--- /dev/null
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/* dbus-sysdeps-unix.c Wrappers around UNIX system/libc features (internal to D-Bus implementation)
+ *
+ * Copyright (C) 2002, 2003, 2006 Red Hat, Inc.
+ * Copyright (C) 2003 CodeFactory AB
+ *
+ * Licensed under the Academic Free License version 2.1
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#define _GNU_SOURCE
+
+#include "dbus-internals.h"
+#include "dbus-sysdeps.h"
+#include "dbus-sysdeps-unix.h"
+#include "dbus-threads.h"
+#include "dbus-protocol.h"
+#include "dbus-transport.h"
+#include "dbus-string.h"
+#include "dbus-userdb.h"
+#include "dbus-list.h"
+#include "dbus-credentials.h"
+
+#include <sys/types.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <dirent.h>
+#include <sys/un.h>
+#include <pwd.h>
+#include <time.h>
+#include <locale.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <grp.h>
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_WRITEV
+#include <sys/uio.h>
+#endif
+#ifdef HAVE_POLL
+#include <sys/poll.h>
+#endif
+#ifdef HAVE_BACKTRACE
+#include <execinfo.h>
+#endif
+#ifdef HAVE_GETPEERUCRED
+#include <ucred.h>
+#endif
+
+#ifdef HAVE_ADT
+#include <bsm/adt.h>
+#endif
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#ifndef AI_ADDRCONFIG
+#define AI_ADDRCONFIG 0
+#endif
+
+#ifndef HAVE_SOCKLEN_T
+#define socklen_t int
+#endif
+
+static dbus_bool_t
+_dbus_open_socket (int *fd_p,
+ int domain,
+ int type,
+ int protocol,
+ DBusError *error)
+{
+ *fd_p = socket (domain, type, protocol);
+ if (*fd_p >= 0)
+ {
+ _dbus_verbose ("socket fd %d opened\n", *fd_p);
+ return TRUE;
+ }
+ else
+ {
+ dbus_set_error(error,
+ _dbus_error_from_errno (errno),
+ "Failed to open socket: %s",
+ _dbus_strerror (errno));
+ return FALSE;
+ }
+}
+
+dbus_bool_t
+_dbus_open_tcp_socket (int *fd,
+ DBusError *error)
+{
+ return _dbus_open_socket(fd, AF_INET, SOCK_STREAM, 0, error);
+}
+
+/**
+ * Opens a UNIX domain socket (as in the socket() call).
+ * Does not bind the socket.
+ * @param fd return location for socket descriptor
+ * @param error return location for an error
+ * @returns #FALSE if error is set
+ */
+dbus_bool_t
+_dbus_open_unix_socket (int *fd,
+ DBusError *error)
+{
+ return _dbus_open_socket(fd, PF_UNIX, SOCK_STREAM, 0, error);
+}
+
+/**
+ * Closes a socket. Should not be used on non-socket
+ * file descriptors or handles.
+ *
+ * @param fd the socket
+ * @param error return location for an error
+ * @returns #FALSE if error is set
+ */
+dbus_bool_t
+_dbus_close_socket (int fd,
+ DBusError *error)
+{
+ return _dbus_close (fd, error);
+}
+
+/**
+ * Like _dbus_read(), but only works on sockets so is
+ * available on Windows.
+ *
+ * @param fd the socket
+ * @param buffer string to append data to
+ * @param count max amount of data to read
+ * @returns number of bytes appended to the string
+ */
+int
+_dbus_read_socket (int fd,
+ DBusString *buffer,
+ int count)
+{
+ return _dbus_read (fd, buffer, count);
+}
+
+/**
+ * Like _dbus_write(), but only supports sockets
+ * and is thus available on Windows.
+ *
+ * @param fd the file descriptor to write
+ * @param buffer the buffer to write data from
+ * @param start the first byte in the buffer to write
+ * @param len the number of bytes to try to write
+ * @returns the number of bytes written or -1 on error
+ */
+int
+_dbus_write_socket (int fd,
+ const DBusString *buffer,
+ int start,
+ int len)
+{
+ return _dbus_write (fd, buffer, start, len);
+}
+
+/**
+ * write data to a pipe.
+ *
+ * @param pipe the pipe instance
+ * @param buffer the buffer to write data from
+ * @param start the first byte in the buffer to write
+ * @param len the number of bytes to try to write
+ * @param error error return
+ * @returns the number of bytes written or -1 on error
+ */
+int
+_dbus_pipe_write (DBusPipe *pipe,
+ const DBusString *buffer,
+ int start,
+ int len,
+ DBusError *error)
+{
+ int written;
+
+ written = _dbus_write (pipe->fd_or_handle, buffer, start, len);
+ if (written < 0)
+ {
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "Writing to pipe: %s\n",
+ _dbus_strerror (errno));
+ }
+ return written;
+}
+
+/**
+ * close a pipe.
+ *
+ * @param pipe the pipe instance
+ * @param error return location for an error
+ * @returns #FALSE if error is set
+ */
+int
+_dbus_pipe_close (DBusPipe *pipe,
+ DBusError *error)
+{
+ if (_dbus_close (pipe->fd_or_handle, error) < 0)
+ {
+ return -1;
+ }
+ else
+ {
+ _dbus_pipe_invalidate (pipe);
+ return 0;
+ }
+}
+
+/**
+ * Like _dbus_write_two() but only works on sockets and is thus
+ * available on Windows.
+ *
+ * @param fd the file descriptor
+ * @param buffer1 first buffer
+ * @param start1 first byte to write in first buffer
+ * @param len1 number of bytes to write from first buffer
+ * @param buffer2 second buffer, or #NULL
+ * @param start2 first byte to write in second buffer
+ * @param len2 number of bytes to write in second buffer
+ * @returns total bytes written from both buffers, or -1 on error
+ */
+int
+_dbus_write_socket_two (int fd,
+ const DBusString *buffer1,
+ int start1,
+ int len1,
+ const DBusString *buffer2,
+ int start2,
+ int len2)
+{
+ return _dbus_write_two (fd, buffer1, start1, len1,
+ buffer2, start2, len2);
+}
+
+
+/**
+ * Thin wrapper around the read() system call that appends
+ * the data it reads to the DBusString buffer. It appends
+ * up to the given count, and returns the same value
+ * and same errno as read(). The only exception is that
+ * _dbus_read() handles EINTR for you. Also, _dbus_read() can
+ * return ENOMEM, even though regular UNIX read doesn't.
+ *
+ * Unlike _dbus_read_socket(), _dbus_read() is not available
+ * on Windows.
+ *
+ * @param fd the file descriptor to read from
+ * @param buffer the buffer to append data to
+ * @param count the amount of data to read
+ * @returns the number of bytes read or -1
+ */
+int
+_dbus_read (int fd,
+ DBusString *buffer,
+ int count)
+{
+ int bytes_read;
+ int start;
+ char *data;
+
+ _dbus_assert (count >= 0);
+
+ start = _dbus_string_get_length (buffer);
+
+ if (!_dbus_string_lengthen (buffer, count))
+ {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ data = _dbus_string_get_data_len (buffer, start, count);
+
+ again:
+
+ bytes_read = read (fd, data, count);
+
+ if (bytes_read < 0)
+ {
+ if (errno == EINTR)
+ goto again;
+ else
+ {
+ /* put length back (note that this doesn't actually realloc anything) */
+ _dbus_string_set_length (buffer, start);
+ return -1;
+ }
+ }
+ else
+ {
+ /* put length back (doesn't actually realloc) */
+ _dbus_string_set_length (buffer, start + bytes_read);
+
+#if 0
+ if (bytes_read > 0)
+ _dbus_verbose_bytes_of_string (buffer, start, bytes_read);
+#endif
+
+ return bytes_read;
+ }
+}
+
+/**
+ * Thin wrapper around the write() system call that writes a part of a
+ * DBusString and handles EINTR for you.
+ *
+ * @param fd the file descriptor to write
+ * @param buffer the buffer to write data from
+ * @param start the first byte in the buffer to write
+ * @param len the number of bytes to try to write
+ * @returns the number of bytes written or -1 on error
+ */
+int
+_dbus_write (int fd,
+ const DBusString *buffer,
+ int start,
+ int len)
+{
+ const char *data;
+ int bytes_written;
+
+ data = _dbus_string_get_const_data_len (buffer, start, len);
+
+ again:
+
+ bytes_written = write (fd, data, len);
+
+ if (bytes_written < 0 && errno == EINTR)
+ goto again;
+
+#if 0
+ if (bytes_written > 0)
+ _dbus_verbose_bytes_of_string (buffer, start, bytes_written);
+#endif
+
+ return bytes_written;
+}
+
+/**
+ * Like _dbus_write() but will use writev() if possible
+ * to write both buffers in sequence. The return value
+ * is the number of bytes written in the first buffer,
+ * plus the number written in the second. If the first
+ * buffer is written successfully and an error occurs
+ * writing the second, the number of bytes in the first
+ * is returned (i.e. the error is ignored), on systems that
+ * don't have writev. Handles EINTR for you.
+ * The second buffer may be #NULL.
+ *
+ * @param fd the file descriptor
+ * @param buffer1 first buffer
+ * @param start1 first byte to write in first buffer
+ * @param len1 number of bytes to write from first buffer
+ * @param buffer2 second buffer, or #NULL
+ * @param start2 first byte to write in second buffer
+ * @param len2 number of bytes to write in second buffer
+ * @returns total bytes written from both buffers, or -1 on error
+ */
+int
+_dbus_write_two (int fd,
+ const DBusString *buffer1,
+ int start1,
+ int len1,
+ const DBusString *buffer2,
+ int start2,
+ int len2)
+{
+ _dbus_assert (buffer1 != NULL);
+ _dbus_assert (start1 >= 0);
+ _dbus_assert (start2 >= 0);
+ _dbus_assert (len1 >= 0);
+ _dbus_assert (len2 >= 0);
+
+#ifdef HAVE_WRITEV
+ {
+ struct iovec vectors[2];
+ const char *data1;
+ const char *data2;
+ int bytes_written;
+
+ data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
+
+ if (buffer2 != NULL)
+ data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
+ else
+ {
+ data2 = NULL;
+ start2 = 0;
+ len2 = 0;
+ }
+
+ vectors[0].iov_base = (char*) data1;
+ vectors[0].iov_len = len1;
+ vectors[1].iov_base = (char*) data2;
+ vectors[1].iov_len = len2;
+
+ again:
+
+ bytes_written = writev (fd,
+ vectors,
+ data2 ? 2 : 1);
+
+ if (bytes_written < 0 && errno == EINTR)
+ goto again;
+
+ return bytes_written;
+ }
+#else /* HAVE_WRITEV */
+ {
+ int ret1;
+
+ ret1 = _dbus_write (fd, buffer1, start1, len1);
+ if (ret1 == len1 && buffer2 != NULL)
+ {
+ ret2 = _dbus_write (fd, buffer2, start2, len2);
+ if (ret2 < 0)
+ ret2 = 0; /* we can't report an error as the first write was OK */
+
+ return ret1 + ret2;
+ }
+ else
+ return ret1;
+ }
+#endif /* !HAVE_WRITEV */
+}
+
+#define _DBUS_MAX_SUN_PATH_LENGTH 99
+
+/**
+ * @def _DBUS_MAX_SUN_PATH_LENGTH
+ *
+ * Maximum length of the path to a UNIX domain socket,
+ * sockaddr_un::sun_path member. POSIX requires that all systems
+ * support at least 100 bytes here, including the nul termination.
+ * We use 99 for the max value to allow for the nul.
+ *
+ * We could probably also do sizeof (addr.sun_path)
+ * but this way we are the same on all platforms
+ * which is probably a good idea.
+ */
+
+/**
+ * Creates a socket and connects it to the UNIX domain socket at the
+ * given path. The connection fd is returned, and is set up as
+ * nonblocking.
+ *
+ * Uses abstract sockets instead of filesystem-linked sockets if
+ * requested (it's possible only on Linux; see "man 7 unix" on Linux).
+ * On non-Linux abstract socket usage always fails.
+ *
+ * @param path the path to UNIX domain socket
+ * @param abstract #TRUE to use abstract namespace
+ * @param error return location for error code
+ * @returns connection file descriptor or -1 on error
+ */
+int
+_dbus_connect_unix_socket (const char *path,
+ dbus_bool_t abstract,
+ DBusError *error)
+{
+ int fd;
+ size_t path_len;
+ struct sockaddr_un addr;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ _dbus_verbose ("connecting to unix socket %s abstract=%d\n",
+ path, abstract);
+
+
+ if (!_dbus_open_unix_socket (&fd, error))
+ {
+ _DBUS_ASSERT_ERROR_IS_SET(error);
+ return -1;
+ }
+ _DBUS_ASSERT_ERROR_IS_CLEAR(error);
+
+ _DBUS_ZERO (addr);
+ addr.sun_family = AF_UNIX;
+ path_len = strlen (path);
+
+ if (abstract)
+ {
+#ifdef HAVE_ABSTRACT_SOCKETS
+ addr.sun_path[0] = '\0'; /* this is what says "use abstract" */
+ path_len++; /* Account for the extra nul byte added to the start of sun_path */
+
+ if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
+ {
+ dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
+ "Abstract socket name too long\n");
+ _dbus_close (fd, NULL);
+ return -1;
+ }
+
+ strncpy (&addr.sun_path[1], path, path_len);
+ /* _dbus_verbose_bytes (addr.sun_path, sizeof (addr.sun_path)); */
+#else /* HAVE_ABSTRACT_SOCKETS */
+ dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
+ "Operating system does not support abstract socket namespace\n");
+ _dbus_close (fd, NULL);
+ return -1;
+#endif /* ! HAVE_ABSTRACT_SOCKETS */
+ }
+ else
+ {
+ if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
+ {
+ dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
+ "Socket name too long\n");
+ _dbus_close (fd, NULL);
+ return -1;
+ }
+
+ strncpy (addr.sun_path, path, path_len);
+ }
+
+ if (connect (fd, (struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (struct sockaddr_un, sun_path) + path_len) < 0)
+ {
+ dbus_set_error (error,
+ _dbus_error_from_errno (errno),
+ "Failed to connect to socket %s: %s",
+ path, _dbus_strerror (errno));
+
+ _dbus_close (fd, NULL);
+ fd = -1;
+
+ return -1;
+ }
+
+ if (!_dbus_set_fd_nonblocking (fd, error))
+ {
+ _DBUS_ASSERT_ERROR_IS_SET (error);
+
+ _dbus_close (fd, NULL);
+ fd = -1;
+
+ return -1;
+ }
+
+ return fd;
+}
+
+/**
+ * Enables or disables the reception of credentials on the given socket during
+ * the next message transmission. This is only effective if the #LOCAL_CREDS
+ * system feature exists, in which case the other side of the connection does
+ * not have to do anything special to send the credentials.
+ *
+ * @param fd socket on which to change the #LOCAL_CREDS flag.
+ * @param on whether to enable or disable the #LOCAL_CREDS flag.
+ */
+static dbus_bool_t
+_dbus_set_local_creds (int fd, dbus_bool_t on)
+{
+ dbus_bool_t retval = TRUE;
+
+#if defined(HAVE_CMSGCRED)
+ /* NOOP just to make sure only one codepath is used
+ * and to prefer CMSGCRED
+ */
+#elif defined(LOCAL_CREDS)
+ int val = on ? 1 : 0;
+ if (setsockopt (fd, 0, LOCAL_CREDS, &val, sizeof (val)) < 0)
+ {
+ _dbus_verbose ("Unable to set LOCAL_CREDS socket option on fd %d\n", fd);
+ retval = FALSE;
+ }
+ else
+ _dbus_verbose ("LOCAL_CREDS %s for further messages on fd %d\n",
+ on ? "enabled" : "disabled", fd);
+#endif
+
+ return retval;
+}
+
+/**
+ * Creates a socket and binds it to the given path,
+ * then listens on the socket. The socket is
+ * set to be nonblocking.
+ *
+ * Uses abstract sockets instead of filesystem-linked
+ * sockets if requested (it's possible only on Linux;
+ * see "man 7 unix" on Linux).
+ * On non-Linux abstract socket usage always fails.
+ *
+ * @param path the socket name
+ * @param abstract #TRUE to use abstract namespace
+ * @param error return location for errors
+ * @returns the listening file descriptor or -1 on error
+ */
+int
+_dbus_listen_unix_socket (const char *path,
+ dbus_bool_t abstract,
+ DBusError *error)
+{
+ int listen_fd;
+ struct sockaddr_un addr;
+ size_t path_len;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ _dbus_verbose ("listening on unix socket %s abstract=%d\n",
+ path, abstract);
+
+ if (!_dbus_open_unix_socket (&listen_fd, error))
+ {
+ _DBUS_ASSERT_ERROR_IS_SET(error);
+ return -1;
+ }
+ _DBUS_ASSERT_ERROR_IS_CLEAR(error);
+
+ _DBUS_ZERO (addr);
+ addr.sun_family = AF_UNIX;
+ path_len = strlen (path);
+
+ if (abstract)
+ {
+#ifdef HAVE_ABSTRACT_SOCKETS
+ /* remember that abstract names aren't nul-terminated so we rely
+ * on sun_path being filled in with zeroes above.
+ */
+ addr.sun_path[0] = '\0'; /* this is what says "use abstract" */
+ path_len++; /* Account for the extra nul byte added to the start of sun_path */
+
+ if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
+ {
+ dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
+ "Abstract socket name too long\n");
+ _dbus_close (listen_fd, NULL);
+ return -1;
+ }
+
+ strncpy (&addr.sun_path[1], path, path_len);
+ /* _dbus_verbose_bytes (addr.sun_path, sizeof (addr.sun_path)); */
+#else /* HAVE_ABSTRACT_SOCKETS */
+ dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
+ "Operating system does not support abstract socket namespace\n");
+ _dbus_close (listen_fd, NULL);
+ return -1;
+#endif /* ! HAVE_ABSTRACT_SOCKETS */
+ }
+ else
+ {
+ /* Discussed security implications of this with Nalin,
+ * and we couldn't think of where it would kick our ass, but
+ * it still seems a bit sucky. It also has non-security suckage;
+ * really we'd prefer to exit if the socket is already in use.
+ * But there doesn't seem to be a good way to do this.
+ *
+ * Just to be extra careful, I threw in the stat() - clearly
+ * the stat() can't *fix* any security issue, but it at least
+ * avoids inadvertent/accidental data loss.
+ */
+ {
+ struct stat sb;
+
+ if (stat (path, &sb) == 0 &&
+ S_ISSOCK (sb.st_mode))
+ unlink (path);
+ }
+
+ if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
+ {
+ dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
+ "Abstract socket name too long\n");
+ _dbus_close (listen_fd, NULL);
+ return -1;
+ }
+
+ strncpy (addr.sun_path, path, path_len);
+ }
+
+ if (bind (listen_fd, (struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (struct sockaddr_un, sun_path) + path_len) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to bind socket \"%s\": %s",
+ path, _dbus_strerror (errno));
+ _dbus_close (listen_fd, NULL);
+ return -1;
+ }
+
+ if (listen (listen_fd, 30 /* backlog */) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to listen on socket \"%s\": %s",
+ path, _dbus_strerror (errno));
+ _dbus_close (listen_fd, NULL);
+ return -1;
+ }
+
+ if (!_dbus_set_local_creds (listen_fd, TRUE))
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to enable LOCAL_CREDS on socket \"%s\": %s",
+ path, _dbus_strerror (errno));
+ close (listen_fd);
+ return -1;
+ }
+
+ if (!_dbus_set_fd_nonblocking (listen_fd, error))
+ {
+ _DBUS_ASSERT_ERROR_IS_SET (error);
+ _dbus_close (listen_fd, NULL);
+ return -1;
+ }
+
+ /* Try opening up the permissions, but if we can't, just go ahead
+ * and continue, maybe it will be good enough.
+ */
+ if (!abstract && chmod (path, 0777) < 0)
+ _dbus_warn ("Could not set mode 0777 on socket %s\n",
+ path);
+
+ return listen_fd;
+}
+
+/**
+ * Creates a socket and connects to a socket at the given host
+ * and port. The connection fd is returned, and is set up as
+ * nonblocking.
+ *
+ * @param host the host name to connect to
+ * @param port the port to connect to
+ * @param family the address family to listen on, NULL for all
+ * @param error return location for error code
+ * @returns connection file descriptor or -1 on error
+ */
+int
+_dbus_connect_tcp_socket (const char *host,
+ const char *port,
+ const char *family,
+ DBusError *error)
+{
+ int fd = -1, res;
+ struct addrinfo hints;
+ struct addrinfo *ai, *tmp;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ if (!_dbus_open_tcp_socket (&fd, error))
+ {
+ _DBUS_ASSERT_ERROR_IS_SET(error);
+ return -1;
+ }
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR(error);
+
+ _DBUS_ZERO (hints);
+
+ if (!family)
+ hints.ai_family = AF_UNSPEC;
+ else if (!strcmp(family, "ipv4"))
+ hints.ai_family = AF_INET;
+ else if (!strcmp(family, "ipv6"))
+ hints.ai_family = AF_INET6;
+ else
+ {
+ dbus_set_error (error,
+ _dbus_error_from_errno (errno),
+ "Unknown address family %s", family);
+ return -1;
+ }
+ hints.ai_protocol = IPPROTO_TCP;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_ADDRCONFIG;
+
+ if ((res = getaddrinfo(host, port, &hints, &ai)) != 0)
+ {
+ dbus_set_error (error,
+ _dbus_error_from_errno (errno),
+ "Failed to lookup host/port: \"%s:%s\": %s (%d)",
+ host, port, gai_strerror(res), res);
+ _dbus_close (fd, NULL);
+ return -1;
+ }
+
+ tmp = ai;
+ while (tmp)
+ {
+ if (!_dbus_open_socket (&fd, tmp->ai_family, SOCK_STREAM, 0, error))
+ {
+ freeaddrinfo(ai);
+ _DBUS_ASSERT_ERROR_IS_SET(error);
+ return -1;
+ }
+ _DBUS_ASSERT_ERROR_IS_CLEAR(error);
+
+ if (connect (fd, (struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
+ {
+ _dbus_close(fd, NULL);
+ fd = -1;
+ tmp = tmp->ai_next;
+ continue;
+ }
+
+ break;
+ }
+ freeaddrinfo(ai);
+
+ if (fd == -1)
+ {
+ dbus_set_error (error,
+ _dbus_error_from_errno (errno),
+ "Failed to connect to socket \"%s:%s\" %s",
+ host, port, _dbus_strerror(errno));
+ return -1;
+ }
+
+
+ if (!_dbus_set_fd_nonblocking (fd, error))
+ {
+ _dbus_close (fd, NULL);
+ fd = -1;
+
+ return -1;
+ }
+
+ return fd;
+}
+
+/**
+ * Creates a socket and binds it to the given path, then listens on
+ * the socket. The socket is set to be nonblocking. In case of port=0
+ * a random free port is used and returned in the port parameter.
+ * If inaddr_any is specified, the hostname is ignored.
+ *
+ * @param host the host name to listen on
+ * @param port the port to listen on, if zero a free port will be used
+ * @param family the address family to listen on, NULL for all
+ * @param retport string to return the actual port listened on
+ * @param fds_p location to store returned file descriptors
+ * @param error return location for errors
+ * @returns the number of listening file descriptors or -1 on error
+ */
+int
+_dbus_listen_tcp_socket (const char *host,
+ const char *port,
+ const char *family,
+ DBusString *retport,
+ int **fds_p,
+ DBusError *error)
+{
+ int nlisten_fd = 0, *listen_fd = NULL, res, i;
+ struct addrinfo hints;
+ struct addrinfo *ai, *tmp;
+
+ *fds_p = NULL;
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ _DBUS_ZERO (hints);
+
+ if (!family)
+ hints.ai_family = AF_UNSPEC;
+ else if (!strcmp(family, "ipv4"))
+ hints.ai_family = AF_INET;
+ else if (!strcmp(family, "ipv6"))
+ hints.ai_family = AF_INET6;
+ else
+ {
+ dbus_set_error (error,
+ _dbus_error_from_errno (errno),
+ "Unknown address family %s", family);
+ return -1;
+ }
+
+ hints.ai_protocol = IPPROTO_TCP;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
+
+ redo_lookup_with_port:
+ if ((res = getaddrinfo(host, port, &hints, &ai)) != 0 || !ai)
+ {
+ dbus_set_error (error,
+ _dbus_error_from_errno (errno),
+ "Failed to lookup host/port: \"%s:%s\": %s (%d)",
+ host ? host : "*", port, gai_strerror(res), res);
+ return -1;
+ }
+
+ tmp = ai;
+ while (tmp)
+ {
+ int fd = -1, *newlisten_fd;
+ if (!_dbus_open_socket (&fd, tmp->ai_family, SOCK_STREAM, 0, error))
+ {
+ _DBUS_ASSERT_ERROR_IS_SET(error);
+ goto failed;
+ }
+ _DBUS_ASSERT_ERROR_IS_CLEAR(error);
+
+ if (bind (fd, (struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
+ {
+ _dbus_close(fd, NULL);
+ if (errno == EADDRINUSE)
+ {
+ /* Depending on kernel policy, it may or may not
+ be neccessary to bind to both IPv4 & 6 addresses
+ so ignore EADDRINUSE here */
+ tmp = tmp->ai_next;
+ continue;
+ }
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to bind socket \"%s:%s\": %s",
+ host ? host : "*", port, _dbus_strerror (errno));
+ goto failed;
+ }
+
+ if (listen (fd, 30 /* backlog */) < 0)
+ {
+ _dbus_close (fd, NULL);
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to listen on socket \"%s:%s\": %s",
+ host ? host : "*", port, _dbus_strerror (errno));
+ goto failed;
+ }
+
+ newlisten_fd = dbus_realloc(listen_fd, sizeof(int)*(nlisten_fd+1));
+ if (!newlisten_fd)
+ {
+ _dbus_close (fd, NULL);
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to allocate file handle array: %s",
+ _dbus_strerror (errno));
+ goto failed;
+ }
+ listen_fd = newlisten_fd;
+ listen_fd[nlisten_fd] = fd;
+ nlisten_fd++;
+
+ if (!_dbus_string_get_length(retport))
+ {
+ /* If the user didn't specify a port, or used 0, then
+ the kernel chooses a port. After the first address
+ is bound to, we need to force all remaining addresses
+ to use the same port */
+ if (!port || !strcmp(port, "0"))
+ {
+ struct sockaddr_storage addr;
+ socklen_t addrlen;
+ char portbuf[50];
+
+ addrlen = sizeof(addr);
+ getsockname(fd, (struct sockaddr*) &addr, &addrlen);
+
+ if ((res = getnameinfo((struct sockaddr*)&addr, addrlen, NULL, 0,
+ portbuf, sizeof(portbuf),
+ NI_NUMERICHOST)) != 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to resolve port \"%s:%s\": %s (%s)",
+ host ? host : "*", port, gai_strerror(res), res);
+ goto failed;
+ }
+ if (!_dbus_string_append(retport, portbuf))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto failed;
+ }
+
+ /* Release current address list & redo lookup */
+ port = _dbus_string_get_const_data(retport);
+ freeaddrinfo(ai);
+ goto redo_lookup_with_port;
+ }
+ else
+ {
+ if (!_dbus_string_append(retport, port))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto failed;
+ }
+ }
+ }
+
+ tmp = tmp->ai_next;
+ }
+ freeaddrinfo(ai);
+ ai = NULL;
+
+ if (!nlisten_fd)
+ {
+ errno = EADDRINUSE;
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to bind socket \"%s:%s\": %s",
+ host ? host : "*", port, _dbus_strerror (errno));
+ return -1;
+ }
+
+ for (i = 0 ; i < nlisten_fd ; i++)
+ {
+ if (!_dbus_set_fd_nonblocking (listen_fd[i], error))
+ {
+ goto failed;
+ }
+ }
+
+ *fds_p = listen_fd;
+
+ return nlisten_fd;
+
+ failed:
+ if (ai)
+ freeaddrinfo(ai);
+ for (i = 0 ; i < nlisten_fd ; i++)
+ _dbus_close(listen_fd[i], NULL);
+ dbus_free(listen_fd);
+ return -1;
+}
+
+static dbus_bool_t
+write_credentials_byte (int server_fd,
+ DBusError *error)
+{
+ int bytes_written;
+ char buf[1] = { '\0' };
+#if defined(HAVE_CMSGCRED)
+ struct {
+ struct cmsghdr hdr;
+ struct cmsgcred cred;
+ } cmsg;
+ struct iovec iov;
+ struct msghdr msg;
+ iov.iov_base = buf;
+ iov.iov_len = 1;
+
+ memset (&msg, 0, sizeof (msg));
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ msg.msg_control = &cmsg;
+ msg.msg_controllen = sizeof (cmsg);
+ memset (&cmsg, 0, sizeof (cmsg));
+ cmsg.hdr.cmsg_len = sizeof (cmsg);
+ cmsg.hdr.cmsg_level = SOL_SOCKET;
+ cmsg.hdr.cmsg_type = SCM_CREDS;
+#endif
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ again:
+
+#if defined(HAVE_CMSGCRED)
+ bytes_written = sendmsg (server_fd, &msg, 0);
+#else
+ bytes_written = write (server_fd, buf, 1);
+#endif
+
+ if (bytes_written < 0 && errno == EINTR)
+ goto again;
+
+ if (bytes_written < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to write credentials byte: %s",
+ _dbus_strerror (errno));
+ return FALSE;
+ }
+ else if (bytes_written == 0)
+ {
+ dbus_set_error (error, DBUS_ERROR_IO_ERROR,
+ "wrote zero bytes writing credentials byte");
+ return FALSE;
+ }
+ else
+ {
+ _dbus_assert (bytes_written == 1);
+ _dbus_verbose ("wrote credentials byte\n");
+ return TRUE;
+ }
+}
+
+/**
+ * Reads a single byte which must be nul (an error occurs otherwise),
+ * and reads unix credentials if available. Clears the credentials
+ * object, then adds pid/uid if available, so any previous credentials
+ * stored in the object are lost.
+ *
+ * Return value indicates whether a byte was read, not whether
+ * we got valid credentials. On some systems, such as Linux,
+ * reading/writing the byte isn't actually required, but we do it
+ * anyway just to avoid multiple codepaths.
+ *
+ * Fails if no byte is available, so you must select() first.
+ *
+ * The point of the byte is that on some systems we have to
+ * use sendmsg()/recvmsg() to transmit credentials.
+ *
+ * @param client_fd the client file descriptor
+ * @param credentials object to add client credentials to
+ * @param error location to store error code
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+_dbus_read_credentials_socket (int client_fd,
+ DBusCredentials *credentials,
+ DBusError *error)
+{
+ struct msghdr msg;
+ struct iovec iov;
+ char buf;
+ dbus_uid_t uid_read;
+ dbus_pid_t pid_read;
+ int bytes_read;
+
+ uid_read = DBUS_UID_UNSET;
+ pid_read = DBUS_PID_UNSET;
+
+#ifdef HAVE_CMSGCRED
+ struct {
+ struct cmsghdr hdr;
+ struct cmsgcred cred;
+ } cmsg;
+
+#elif defined(LOCAL_CREDS)
+ struct {
+ struct cmsghdr hdr;
+ struct sockcred cred;
+ } cmsg;
+#endif
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ /* The POSIX spec certainly doesn't promise this, but
+ * we need these assertions to fail as soon as we're wrong about
+ * it so we can do the porting fixups
+ */
+ _dbus_assert (sizeof (pid_t) <= sizeof (dbus_pid_t));
+ _dbus_assert (sizeof (uid_t) <= sizeof (dbus_uid_t));
+ _dbus_assert (sizeof (gid_t) <= sizeof (dbus_gid_t));
+
+ _dbus_credentials_clear (credentials);
+
+ /* Systems supporting LOCAL_CREDS are configured to have this feature
+ * enabled (if it does not conflict with HAVE_CMSGCRED) prior accepting
+ * the connection. Therefore, the received message must carry the
+ * credentials information without doing anything special.
+ */
+
+ iov.iov_base = &buf;
+ iov.iov_len = 1;
+
+ memset (&msg, 0, sizeof (msg));
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+#if defined(HAVE_CMSGCRED) || defined(LOCAL_CREDS)
+ memset (&cmsg, 0, sizeof (cmsg));
+ msg.msg_control = &cmsg;
+ msg.msg_controllen = sizeof (cmsg);
+#endif
+
+ again:
+ bytes_read = recvmsg (client_fd, &msg, 0);
+
+ if (bytes_read < 0)
+ {
+ if (errno == EINTR)
+ goto again;
+
+ /* EAGAIN or EWOULDBLOCK would be unexpected here since we would
+ * normally only call read_credentials if the socket was ready
+ * for reading
+ */
+
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to read credentials byte: %s",
+ _dbus_strerror (errno));
+ return FALSE;
+ }
+ else if (bytes_read == 0)
+ {
+ /* this should not happen unless we are using recvmsg wrong,
+ * so is essentially here for paranoia
+ */
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "Failed to read credentials byte (zero-length read)");
+ return FALSE;
+ }
+ else if (buf != '\0')
+ {
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "Credentials byte was not nul");
+ return FALSE;
+ }
+
+#if defined(HAVE_CMSGCRED) || defined(LOCAL_CREDS)
+ if (cmsg.hdr.cmsg_len < sizeof (cmsg) || cmsg.hdr.cmsg_type != SCM_CREDS)
+ {
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "Message from recvmsg() was not SCM_CREDS");
+ return FALSE;
+ }
+#endif
+
+ _dbus_verbose ("read credentials byte\n");
+
+ {
+#ifdef SO_PEERCRED
+ struct ucred cr;
+ int cr_len = sizeof (cr);
+
+ if (getsockopt (client_fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len) == 0 &&
+ cr_len == sizeof (cr))
+ {
+ pid_read = cr.pid;
+ uid_read = cr.uid;
+ }
+ else
+ {
+ _dbus_verbose ("Failed to getsockopt() credentials, returned len %d/%d: %s\n",
+ cr_len, (int) sizeof (cr), _dbus_strerror (errno));
+ }
+#elif defined(HAVE_CMSGCRED)
+ pid_read = cmsg.cred.cmcred_pid;
+ uid_read = cmsg.cred.cmcred_euid;
+#elif defined(LOCAL_CREDS)
+ pid_read = DBUS_PID_UNSET;
+ uid_read = cmsg.cred.sc_uid;
+ /* Since we have already got the credentials from this socket, we can
+ * disable its LOCAL_CREDS flag if it was ever set. */
+ _dbus_set_local_creds (client_fd, FALSE);
+#elif defined(HAVE_GETPEEREID)
+ uid_t euid;
+ gid_t egid;
+ if (getpeereid (client_fd, &euid, &egid) == 0)
+ {
+ uid_read = euid;
+ }
+ else
+ {
+ _dbus_verbose ("Failed to getpeereid() credentials: %s\n", _dbus_strerror (errno));
+ }
+#elif defined(HAVE_GETPEERUCRED)
+ ucred_t * ucred = NULL;
+ if (getpeerucred (client_fd, &ucred) == 0)
+ {
+ pid_read = ucred_getpid (ucred);
+ uid_read = ucred_geteuid (ucred);
+#ifdef HAVE_ADT
+ /* generate audit session data based on socket ucred */
+ adt_session_data_t *adth = NULL;
+ adt_export_data_t *data = NULL;
+ size_t size = 0;
+ if (adt_start_session (&adth, NULL, 0) || (adth == NULL))
+ {
+ _dbus_verbose ("Failed to adt_start_session(): %s\n", _dbus_strerror (errno));
+ }
+ else
+ {
+ if (adt_set_from_ucred (adth, ucred, ADT_NEW))
+ {
+ _dbus_verbose ("Failed to adt_set_from_ucred(): %s\n", _dbus_strerror (errno));
+ }
+ else
+ {
+ size = adt_export_session_data (adth, &data);
+ if (size <= 0)
+ {
+ _dbus_verbose ("Failed to adt_export_session_data(): %s\n", _dbus_strerror (errno));
+ }
+ else
+ {
+ _dbus_credentials_add_adt_audit_data (credentials, data, size);
+ free (data);
+ }
+ }
+ (void) adt_end_session (adth);
+ }
+#endif /* HAVE_ADT */
+ }
+ else
+ {
+ _dbus_verbose ("Failed to getpeerucred() credentials: %s\n", _dbus_strerror (errno));
+ }
+ if (ucred != NULL)
+ ucred_free (ucred);
+#else /* !SO_PEERCRED && !HAVE_CMSGCRED && !HAVE_GETPEEREID && !HAVE_GETPEERUCRED */
+ _dbus_verbose ("Socket credentials not supported on this OS\n");
+#endif
+ }
+
+ _dbus_verbose ("Credentials:"
+ " pid "DBUS_PID_FORMAT
+ " uid "DBUS_UID_FORMAT
+ "\n",
+ pid_read,
+ uid_read);
+
+ if (pid_read != DBUS_PID_UNSET)
+ {
+ if (!_dbus_credentials_add_unix_pid (credentials, pid_read))
+ {
+ _DBUS_SET_OOM (error);
+ return FALSE;
+ }
+ }
+
+ if (uid_read != DBUS_UID_UNSET)
+ {
+ if (!_dbus_credentials_add_unix_uid (credentials, uid_read))
+ {
+ _DBUS_SET_OOM (error);
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+/**
+ * Sends a single nul byte with our UNIX credentials as ancillary
+ * data. Returns #TRUE if the data was successfully written. On
+ * systems that don't support sending credentials, just writes a byte,
+ * doesn't send any credentials. On some systems, such as Linux,
+ * reading/writing the byte isn't actually required, but we do it
+ * anyway just to avoid multiple codepaths.
+ *
+ * Fails if no byte can be written, so you must select() first.
+ *
+ * The point of the byte is that on some systems we have to
+ * use sendmsg()/recvmsg() to transmit credentials.
+ *
+ * @param server_fd file descriptor for connection to server
+ * @param error return location for error code
+ * @returns #TRUE if the byte was sent
+ */
+dbus_bool_t
+_dbus_send_credentials_socket (int server_fd,
+ DBusError *error)
+{
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ if (write_credentials_byte (server_fd, error))
+ return TRUE;
+ else
+ return FALSE;
+}
+
+/**
+ * Accepts a connection on a listening socket.
+ * Handles EINTR for you.
+ *
+ * @param listen_fd the listen file descriptor
+ * @returns the connection fd of the client, or -1 on error
+ */
+int
+_dbus_accept (int listen_fd)
+{
+ int client_fd;
+ struct sockaddr addr;
+ socklen_t addrlen;
+
+ addrlen = sizeof (addr);
+
+ retry:
+ client_fd = accept (listen_fd, &addr, &addrlen);
+
+ if (client_fd < 0)
+ {
+ if (errno == EINTR)
+ goto retry;
+ }
+
+ _dbus_verbose ("client fd %d accepted\n", client_fd);
+
+ return client_fd;
+}
+
+/**
+ * Checks to make sure the given directory is
+ * private to the user
+ *
+ * @param dir the name of the directory
+ * @param error error return
+ * @returns #FALSE on failure
+ **/
+dbus_bool_t
+_dbus_check_dir_is_private_to_user (DBusString *dir, DBusError *error)
+{
+ const char *directory;
+ struct stat sb;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ directory = _dbus_string_get_const_data (dir);
+
+ if (stat (directory, &sb) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "%s", _dbus_strerror (errno));
+
+ return FALSE;
+ }
+
+ if ((S_IROTH & sb.st_mode) || (S_IWOTH & sb.st_mode) ||
+ (S_IRGRP & sb.st_mode) || (S_IWGRP & sb.st_mode))
+ {
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "%s directory is not private to the user", directory);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static dbus_bool_t
+fill_user_info_from_passwd (struct passwd *p,
+ DBusUserInfo *info,
+ DBusError *error)
+{
+ _dbus_assert (p->pw_name != NULL);
+ _dbus_assert (p->pw_dir != NULL);
+
+ info->uid = p->pw_uid;
+ info->primary_gid = p->pw_gid;
+ info->username = _dbus_strdup (p->pw_name);
+ info->homedir = _dbus_strdup (p->pw_dir);
+
+ if (info->username == NULL ||
+ info->homedir == NULL)
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static dbus_bool_t
+fill_user_info (DBusUserInfo *info,
+ dbus_uid_t uid,
+ const DBusString *username,
+ DBusError *error)
+{
+ const char *username_c;
+
+ /* exactly one of username/uid provided */
+ _dbus_assert (username != NULL || uid != DBUS_UID_UNSET);
+ _dbus_assert (username == NULL || uid == DBUS_UID_UNSET);
+
+ info->uid = DBUS_UID_UNSET;
+ info->primary_gid = DBUS_GID_UNSET;
+ info->group_ids = NULL;
+ info->n_group_ids = 0;
+ info->username = NULL;
+ info->homedir = NULL;
+
+ if (username != NULL)
+ username_c = _dbus_string_get_const_data (username);
+ else
+ username_c = NULL;
+
+ /* For now assuming that the getpwnam() and getpwuid() flavors
+ * are always symmetrical, if not we have to add more configure
+ * checks
+ */
+
+#if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)
+ {
+ struct passwd *p;
+ int result;
+ size_t buflen;
+ char *buf;
+ struct passwd p_str;
+
+ /* retrieve maximum needed size for buf */
+ buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
+
+ /* sysconf actually returns a long, but everything else expects size_t,
+ * so just recast here.
+ * https://bugs.freedesktop.org/show_bug.cgi?id=17061
+ */
+ if ((long) buflen <= 0)
+ buflen = 1024;
+
+ result = -1;
+ while (1)
+ {
+ buf = dbus_malloc (buflen);
+ if (buf == NULL)
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ return FALSE;
+ }
+
+ p = NULL;
+#ifdef HAVE_POSIX_GETPWNAM_R
+ if (uid != DBUS_UID_UNSET)
+ result = getpwuid_r (uid, &p_str, buf, buflen,
+ &p);
+ else
+ result = getpwnam_r (username_c, &p_str, buf, buflen,
+ &p);
+#else
+ if (uid != DBUS_UID_UNSET)
+ p = getpwuid_r (uid, &p_str, buf, buflen);
+ else
+ p = getpwnam_r (username_c, &p_str, buf, buflen);
+ result = 0;
+#endif /* !HAVE_POSIX_GETPWNAM_R */
+ //Try a bigger buffer if ERANGE was returned
+ if (result == ERANGE && buflen < 512 * 1024)
+ {
+ dbus_free (buf);
+ buflen *= 2;
+ }
+ else
+ {
+ break;
+ }
+ }
+ if (result == 0 && p == &p_str)
+ {
+ if (!fill_user_info_from_passwd (p, info, error))
+ {
+ dbus_free (buf);
+ return FALSE;
+ }
+ dbus_free (buf);
+ }
+ else
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "User \"%s\" unknown or no memory to allocate password entry\n",
+ username_c ? username_c : "???");
+ _dbus_verbose ("User %s unknown\n", username_c ? username_c : "???");
+ dbus_free (buf);
+ return FALSE;
+ }
+ }
+#else /* ! HAVE_GETPWNAM_R */
+ {
+ /* I guess we're screwed on thread safety here */
+ struct passwd *p;
+
+ if (uid != DBUS_UID_UNSET)
+ p = getpwuid (uid);
+ else
+ p = getpwnam (username_c);
+
+ if (p != NULL)
+ {
+ if (!fill_user_info_from_passwd (p, info, error))
+ {
+ return FALSE;
+ }
+ }
+ else
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "User \"%s\" unknown or no memory to allocate password entry\n",
+ username_c ? username_c : "???");
+ _dbus_verbose ("User %s unknown\n", username_c ? username_c : "???");
+ return FALSE;
+ }
+ }
+#endif /* ! HAVE_GETPWNAM_R */
+
+ /* Fill this in so we can use it to get groups */
+ username_c = info->username;
+
+#ifdef HAVE_GETGROUPLIST
+ {
+ gid_t *buf;
+ int buf_count;
+ int i;
+
+ buf_count = 17;
+ buf = dbus_new (gid_t, buf_count);
+ if (buf == NULL)
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto failed;
+ }
+
+ if (getgrouplist (username_c,
+ info->primary_gid,
+ buf, &buf_count) < 0)
+ {
+ gid_t *new = dbus_realloc (buf, buf_count * sizeof (buf[0]));
+ if (new == NULL)
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ dbus_free (buf);
+ goto failed;
+ }
+
+ buf = new;
+
+ errno = 0;
+ if (getgrouplist (username_c, info->primary_gid, buf, &buf_count) < 0)
+ {
+ dbus_set_error (error,
+ _dbus_error_from_errno (errno),
+ "Failed to get groups for username \"%s\" primary GID "
+ DBUS_GID_FORMAT ": %s\n",
+ username_c, info->primary_gid,
+ _dbus_strerror (errno));
+ dbus_free (buf);
+ goto failed;
+ }
+ }
+
+ info->group_ids = dbus_new (dbus_gid_t, buf_count);
+ if (info->group_ids == NULL)
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ dbus_free (buf);
+ goto failed;
+ }
+
+ for (i = 0; i < buf_count; ++i)
+ info->group_ids[i] = buf[i];
+
+ info->n_group_ids = buf_count;
+
+ dbus_free (buf);
+ }
+#else /* HAVE_GETGROUPLIST */
+ {
+ /* We just get the one group ID */
+ info->group_ids = dbus_new (dbus_gid_t, 1);
+ if (info->group_ids == NULL)
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto failed;
+ }
+
+ info->n_group_ids = 1;
+
+ (info->group_ids)[0] = info->primary_gid;
+ }
+#endif /* HAVE_GETGROUPLIST */
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ return TRUE;
+
+ failed:
+ _DBUS_ASSERT_ERROR_IS_SET (error);
+ return FALSE;
+}
+
+/**
+ * Gets user info for the given username.
+ *
+ * @param info user info object to initialize
+ * @param username the username
+ * @param error error return
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+_dbus_user_info_fill (DBusUserInfo *info,
+ const DBusString *username,
+ DBusError *error)
+{
+ return fill_user_info (info, DBUS_UID_UNSET,
+ username, error);
+}
+
+/**
+ * Gets user info for the given user ID.
+ *
+ * @param info user info object to initialize
+ * @param uid the user ID
+ * @param error error return
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+_dbus_user_info_fill_uid (DBusUserInfo *info,
+ dbus_uid_t uid,
+ DBusError *error)
+{
+ return fill_user_info (info, uid,
+ NULL, error);
+}
+
+/**
+ * Adds the credentials of the current process to the
+ * passed-in credentials object.
+ *
+ * @param credentials credentials to add to
+ * @returns #FALSE if no memory; does not properly roll back on failure, so only some credentials may have been added
+ */
+dbus_bool_t
+_dbus_credentials_add_from_current_process (DBusCredentials *credentials)
+{
+ /* The POSIX spec certainly doesn't promise this, but
+ * we need these assertions to fail as soon as we're wrong about
+ * it so we can do the porting fixups
+ */
+ _dbus_assert (sizeof (pid_t) <= sizeof (dbus_pid_t));
+ _dbus_assert (sizeof (uid_t) <= sizeof (dbus_uid_t));
+ _dbus_assert (sizeof (gid_t) <= sizeof (dbus_gid_t));
+
+ if (!_dbus_credentials_add_unix_pid(credentials, _dbus_getpid()))
+ return FALSE;
+ if (!_dbus_credentials_add_unix_uid(credentials, _dbus_geteuid()))
+ return FALSE;
+
+ return TRUE;
+}
+
+/**
+ * Append to the string the identity we would like to have when we
+ * authenticate, on UNIX this is the current process UID and on
+ * Windows something else, probably a Windows SID string. No escaping
+ * is required, that is done in dbus-auth.c. The username here
+ * need not be anything human-readable, it can be the machine-readable
+ * form i.e. a user id.
+ *
+ * @param str the string to append to
+ * @returns #FALSE on no memory
+ */
+dbus_bool_t
+_dbus_append_user_from_current_process (DBusString *str)
+{
+ return _dbus_string_append_uint (str,
+ _dbus_geteuid ());
+}
+
+/**
+ * Gets our process ID
+ * @returns process ID
+ */
+dbus_pid_t
+_dbus_getpid (void)
+{
+ return getpid ();
+}
+
+/** Gets our UID
+ * @returns process UID
+ */
+dbus_uid_t
+_dbus_getuid (void)
+{
+ return getuid ();
+}
+
+/** Gets our effective UID
+ * @returns process effective UID
+ */
+dbus_uid_t
+_dbus_geteuid (void)
+{
+ return geteuid ();
+}
+
+/**
+ * The only reason this is separate from _dbus_getpid() is to allow it
+ * on Windows for logging but not for other purposes.
+ *
+ * @returns process ID to put in log messages
+ */
+unsigned long
+_dbus_pid_for_log (void)
+{
+ return getpid ();
+}
+
+/**
+ * Gets a UID from a UID string.
+ *
+ * @param uid_str the UID in string form
+ * @param uid UID to fill in
+ * @returns #TRUE if successfully filled in UID
+ */
+dbus_bool_t
+_dbus_parse_uid (const DBusString *uid_str,
+ dbus_uid_t *uid)
+{
+ int end;
+ long val;
+
+ if (_dbus_string_get_length (uid_str) == 0)
+ {
+ _dbus_verbose ("UID string was zero length\n");
+ return FALSE;
+ }
+
+ val = -1;
+ end = 0;
+ if (!_dbus_string_parse_int (uid_str, 0, &val,
+ &end))
+ {
+ _dbus_verbose ("could not parse string as a UID\n");
+ return FALSE;
+ }
+
+ if (end != _dbus_string_get_length (uid_str))
+ {
+ _dbus_verbose ("string contained trailing stuff after UID\n");
+ return FALSE;
+ }
+
+ *uid = val;
+
+ return TRUE;
+}
+
+
+_DBUS_DEFINE_GLOBAL_LOCK (atomic);
+
+#if DBUS_USE_ATOMIC_INT_486_COND
+/* Taken from CVS version 1.7 of glibc's sysdeps/i386/i486/atomicity.h */
+/* Since the asm stuff here is gcc-specific we go ahead and use "inline" also */
+static inline dbus_int32_t
+atomic_exchange_and_add (DBusAtomic *atomic,
+ volatile dbus_int32_t val)
+{
+ register dbus_int32_t result;
+
+ __asm__ __volatile__ ("lock; xaddl %0,%1"
+ : "=r" (result), "=m" (atomic->value)
+ : "0" (val), "m" (atomic->value));
+ return result;
+}
+#endif
+
+/**
+ * Atomically increments an integer
+ *
+ * @param atomic pointer to the integer to increment
+ * @returns the value before incrementing
+ *
+ * @todo implement arch-specific faster atomic ops
+ */
+dbus_int32_t
+_dbus_atomic_inc (DBusAtomic *atomic)
+{
+#if DBUS_USE_ATOMIC_INT_486_COND
+ return atomic_exchange_and_add (atomic, 1);
+#else
+ dbus_int32_t res;
+ _DBUS_LOCK (atomic);
+ res = atomic->value;
+ atomic->value += 1;
+ _DBUS_UNLOCK (atomic);
+ return res;
+#endif
+}
+
+/**
+ * Atomically decrement an integer
+ *
+ * @param atomic pointer to the integer to decrement
+ * @returns the value before decrementing
+ *
+ * @todo implement arch-specific faster atomic ops
+ */
+dbus_int32_t
+_dbus_atomic_dec (DBusAtomic *atomic)
+{
+#if DBUS_USE_ATOMIC_INT_486_COND
+ return atomic_exchange_and_add (atomic, -1);
+#else
+ dbus_int32_t res;
+
+ _DBUS_LOCK (atomic);
+ res = atomic->value;
+ atomic->value -= 1;
+ _DBUS_UNLOCK (atomic);
+ return res;
+#endif
+}
+
+#ifdef DBUS_BUILD_TESTS
+/** Gets our GID
+ * @returns process GID
+ */
+dbus_gid_t
+_dbus_getgid (void)
+{
+ return getgid ();
+}
+#endif
+
+/**
+ * Wrapper for poll().
+ *
+ * @param fds the file descriptors to poll
+ * @param n_fds number of descriptors in the array
+ * @param timeout_milliseconds timeout or -1 for infinite
+ * @returns numbers of fds with revents, or <0 on error
+ */
+int
+_dbus_poll (DBusPollFD *fds,
+ int n_fds,
+ int timeout_milliseconds)
+{
+#if defined(HAVE_POLL) && !defined(BROKEN_POLL)
+ /* This big thing is a constant expression and should get optimized
+ * out of existence. So it's more robust than a configure check at
+ * no cost.
+ */
+ if (_DBUS_POLLIN == POLLIN &&
+ _DBUS_POLLPRI == POLLPRI &&
+ _DBUS_POLLOUT == POLLOUT &&
+ _DBUS_POLLERR == POLLERR &&
+ _DBUS_POLLHUP == POLLHUP &&
+ _DBUS_POLLNVAL == POLLNVAL &&
+ sizeof (DBusPollFD) == sizeof (struct pollfd) &&
+ _DBUS_STRUCT_OFFSET (DBusPollFD, fd) ==
+ _DBUS_STRUCT_OFFSET (struct pollfd, fd) &&
+ _DBUS_STRUCT_OFFSET (DBusPollFD, events) ==
+ _DBUS_STRUCT_OFFSET (struct pollfd, events) &&
+ _DBUS_STRUCT_OFFSET (DBusPollFD, revents) ==
+ _DBUS_STRUCT_OFFSET (struct pollfd, revents))
+ {
+ return poll ((struct pollfd*) fds,
+ n_fds,
+ timeout_milliseconds);
+ }
+ else
+ {
+ /* We have to convert the DBusPollFD to an array of
+ * struct pollfd, poll, and convert back.
+ */
+ _dbus_warn ("didn't implement poll() properly for this system yet\n");
+ return -1;
+ }
+#else /* ! HAVE_POLL */
+
+ fd_set read_set, write_set, err_set;
+ int max_fd = 0;
+ int i;
+ struct timeval tv;
+ int ready;
+
+ FD_ZERO (&read_set);
+ FD_ZERO (&write_set);
+ FD_ZERO (&err_set);
+
+ for (i = 0; i < n_fds; i++)
+ {
+ DBusPollFD *fdp = &fds[i];
+
+ if (fdp->events & _DBUS_POLLIN)
+ FD_SET (fdp->fd, &read_set);
+
+ if (fdp->events & _DBUS_POLLOUT)
+ FD_SET (fdp->fd, &write_set);
+
+ FD_SET (fdp->fd, &err_set);
+
+ max_fd = MAX (max_fd, fdp->fd);
+ }
+
+ tv.tv_sec = timeout_milliseconds / 1000;
+ tv.tv_usec = (timeout_milliseconds % 1000) * 1000;
+
+ ready = select (max_fd + 1, &read_set, &write_set, &err_set,
+ timeout_milliseconds < 0 ? NULL : &tv);
+
+ if (ready > 0)
+ {
+ for (i = 0; i < n_fds; i++)
+ {
+ DBusPollFD *fdp = &fds[i];
+
+ fdp->revents = 0;
+
+ if (FD_ISSET (fdp->fd, &read_set))
+ fdp->revents |= _DBUS_POLLIN;
+
+ if (FD_ISSET (fdp->fd, &write_set))
+ fdp->revents |= _DBUS_POLLOUT;
+
+ if (FD_ISSET (fdp->fd, &err_set))
+ fdp->revents |= _DBUS_POLLERR;
+ }
+ }
+
+ return ready;
+#endif
+}
+
+/**
+ * Get current time, as in gettimeofday().
+ *
+ * @param tv_sec return location for number of seconds
+ * @param tv_usec return location for number of microseconds (thousandths)
+ */
+void
+_dbus_get_current_time (long *tv_sec,
+ long *tv_usec)
+{
+ struct timeval t;
+
+ gettimeofday (&t, NULL);
+
+ if (tv_sec)
+ *tv_sec = t.tv_sec;
+ if (tv_usec)
+ *tv_usec = t.tv_usec;
+}
+
+/**
+ * Appends the contents of the given file to the string,
+ * returning error code. At the moment, won't open a file
+ * more than a megabyte in size.
+ *
+ * @param str the string to append to
+ * @param filename filename to load
+ * @param error place to set an error
+ * @returns #FALSE if error was set
+ */
+dbus_bool_t
+_dbus_file_get_contents (DBusString *str,
+ const DBusString *filename,
+ DBusError *error)
+{
+ int fd;
+ struct stat sb;
+ int orig_len;
+ int total;
+ const char *filename_c;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ filename_c = _dbus_string_get_const_data (filename);
+
+ /* O_BINARY useful on Cygwin */
+ fd = open (filename_c, O_RDONLY | O_BINARY);
+ if (fd < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to open \"%s\": %s",
+ filename_c,
+ _dbus_strerror (errno));
+ return FALSE;
+ }
+
+ _dbus_verbose ("file fd %d opened\n", fd);
+
+ if (fstat (fd, &sb) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to stat \"%s\": %s",
+ filename_c,
+ _dbus_strerror (errno));
+
+ _dbus_verbose ("fstat() failed: %s",
+ _dbus_strerror (errno));
+
+ _dbus_close (fd, NULL);
+
+ return FALSE;
+ }
+
+ if (sb.st_size > _DBUS_ONE_MEGABYTE)
+ {
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "File size %lu of \"%s\" is too large.",
+ (unsigned long) sb.st_size, filename_c);
+ _dbus_close (fd, NULL);
+ return FALSE;
+ }
+
+ total = 0;
+ orig_len = _dbus_string_get_length (str);
+ if (sb.st_size > 0 && S_ISREG (sb.st_mode))
+ {
+ int bytes_read;
+
+ while (total < (int) sb.st_size)
+ {
+ bytes_read = _dbus_read (fd, str,
+ sb.st_size - total);
+ if (bytes_read <= 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Error reading \"%s\": %s",
+ filename_c,
+ _dbus_strerror (errno));
+
+ _dbus_verbose ("read() failed: %s",
+ _dbus_strerror (errno));
+
+ _dbus_close (fd, NULL);
+ _dbus_string_set_length (str, orig_len);
+ return FALSE;
+ }
+ else
+ total += bytes_read;
+ }
+
+ _dbus_close (fd, NULL);
+ return TRUE;
+ }
+ else if (sb.st_size != 0)
+ {
+ _dbus_verbose ("Can only open regular files at the moment.\n");
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "\"%s\" is not a regular file",
+ filename_c);
+ _dbus_close (fd, NULL);
+ return FALSE;
+ }
+ else
+ {
+ _dbus_close (fd, NULL);
+ return TRUE;
+ }
+}
+
+/**
+ * Writes a string out to a file. If the file exists,
+ * it will be atomically overwritten by the new data.
+ *
+ * @param str the string to write out
+ * @param filename the file to save string to
+ * @param error error to be filled in on failure
+ * @returns #FALSE on failure
+ */
+dbus_bool_t
+_dbus_string_save_to_file (const DBusString *str,
+ const DBusString *filename,
+ DBusError *error)
+{
+ int fd;
+ int bytes_to_write;
+ const char *filename_c;
+ DBusString tmp_filename;
+ const char *tmp_filename_c;
+ int total;
+ dbus_bool_t need_unlink;
+ dbus_bool_t retval;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ fd = -1;
+ retval = FALSE;
+ need_unlink = FALSE;
+
+ if (!_dbus_string_init (&tmp_filename))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ return FALSE;
+ }
+
+ if (!_dbus_string_copy (filename, 0, &tmp_filename, 0))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ _dbus_string_free (&tmp_filename);
+ return FALSE;
+ }
+
+ if (!_dbus_string_append (&tmp_filename, "."))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ _dbus_string_free (&tmp_filename);
+ return FALSE;
+ }
+
+#define N_TMP_FILENAME_RANDOM_BYTES 8
+ if (!_dbus_generate_random_ascii (&tmp_filename, N_TMP_FILENAME_RANDOM_BYTES))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ _dbus_string_free (&tmp_filename);
+ return FALSE;
+ }
+
+ filename_c = _dbus_string_get_const_data (filename);
+ tmp_filename_c = _dbus_string_get_const_data (&tmp_filename);
+
+ fd = open (tmp_filename_c, O_WRONLY | O_BINARY | O_EXCL | O_CREAT,
+ 0600);
+ if (fd < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Could not create %s: %s", tmp_filename_c,
+ _dbus_strerror (errno));
+ goto out;
+ }
+
+ _dbus_verbose ("tmp file fd %d opened\n", fd);
+
+ need_unlink = TRUE;
+
+ total = 0;
+ bytes_to_write = _dbus_string_get_length (str);
+
+ while (total < bytes_to_write)
+ {
+ int bytes_written;
+
+ bytes_written = _dbus_write (fd, str, total,
+ bytes_to_write - total);
+
+ if (bytes_written <= 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Could not write to %s: %s", tmp_filename_c,
+ _dbus_strerror (errno));
+
+ goto out;
+ }
+
+ total += bytes_written;
+ }
+
+ if (fsync(fd))
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Could not synchronize file %s: %s",
+ tmp_filename_c, _dbus_strerror (errno));
+
+ goto out;
+ }
+
+ if (!_dbus_close (fd, NULL))
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Could not close file %s: %s",
+ tmp_filename_c, _dbus_strerror (errno));
+
+ goto out;
+ }
+
+ fd = -1;
+
+ if (rename (tmp_filename_c, filename_c) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Could not rename %s to %s: %s",
+ tmp_filename_c, filename_c,
+ _dbus_strerror (errno));
+
+ goto out;
+ }
+
+ need_unlink = FALSE;
+
+ retval = TRUE;
+
+ out:
+ /* close first, then unlink, to prevent ".nfs34234235" garbage
+ * files
+ */
+
+ if (fd >= 0)
+ _dbus_close (fd, NULL);
+
+ if (need_unlink && unlink (tmp_filename_c) < 0)
+ _dbus_verbose ("Failed to unlink temp file %s: %s\n",
+ tmp_filename_c, _dbus_strerror (errno));
+
+ _dbus_string_free (&tmp_filename);
+
+ if (!retval)
+ _DBUS_ASSERT_ERROR_IS_SET (error);
+
+ return retval;
+}
+
+/** Makes the file readable by every user in the system.
+ *
+ * @param filename the filename
+ * @param error error location
+ * @returns #TRUE if the file's permissions could be changed.
+ */
+dbus_bool_t
+_dbus_make_file_world_readable(const DBusString *filename,
+ DBusError *error)
+{
+ const char *filename_c;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ filename_c = _dbus_string_get_const_data (filename);
+ if (chmod (filename_c, 0644) == -1)
+ {
+ dbus_set_error (error,
+ DBUS_ERROR_FAILED,
+ "Could not change permissions of file %s: %s\n",
+ filename_c,
+ _dbus_strerror (errno));
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/** Creates the given file, failing if the file already exists.
+ *
+ * @param filename the filename
+ * @param error error location
+ * @returns #TRUE if we created the file and it didn't exist
+ */
+dbus_bool_t
+_dbus_create_file_exclusively (const DBusString *filename,
+ DBusError *error)
+{
+ int fd;
+ const char *filename_c;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ filename_c = _dbus_string_get_const_data (filename);
+
+ fd = open (filename_c, O_WRONLY | O_BINARY | O_EXCL | O_CREAT,
+ 0600);
+ if (fd < 0)
+ {
+ dbus_set_error (error,
+ DBUS_ERROR_FAILED,
+ "Could not create file %s: %s\n",
+ filename_c,
+ _dbus_strerror (errno));
+ return FALSE;
+ }
+
+ _dbus_verbose ("exclusive file fd %d opened\n", fd);
+
+ if (!_dbus_close (fd, NULL))
+ {
+ dbus_set_error (error,
+ DBUS_ERROR_FAILED,
+ "Could not close file %s: %s\n",
+ filename_c,
+ _dbus_strerror (errno));
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Deletes the given file.
+ *
+ * @param filename the filename
+ * @param error error location
+ *
+ * @returns #TRUE if unlink() succeeded
+ */
+dbus_bool_t
+_dbus_delete_file (const DBusString *filename,
+ DBusError *error)
+{
+ const char *filename_c;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ filename_c = _dbus_string_get_const_data (filename);
+
+ if (unlink (filename_c) < 0)
+ {
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "Failed to delete file %s: %s\n",
+ filename_c, _dbus_strerror (errno));
+ return FALSE;
+ }
+ else
+ return TRUE;
+}
+
+/**
+ * Creates a directory; succeeds if the directory
+ * is created or already existed.
+ *
+ * @param filename directory filename
+ * @param error initialized error object
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+_dbus_create_directory (const DBusString *filename,
+ DBusError *error)
+{
+ const char *filename_c;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ filename_c = _dbus_string_get_const_data (filename);
+
+ if (mkdir (filename_c, 0700) < 0)
+ {
+ if (errno == EEXIST)
+ return TRUE;
+
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "Failed to create directory %s: %s\n",
+ filename_c, _dbus_strerror (errno));
+ return FALSE;
+ }
+ else
+ return TRUE;
+}
+
+/**
+ * Appends the given filename to the given directory.
+ *
+ * @todo it might be cute to collapse multiple '/' such as "foo//"
+ * concat "//bar"
+ *
+ * @param dir the directory name
+ * @param next_component the filename
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+_dbus_concat_dir_and_file (DBusString *dir,
+ const DBusString *next_component)
+{
+ dbus_bool_t dir_ends_in_slash;
+ dbus_bool_t file_starts_with_slash;
+
+ if (_dbus_string_get_length (dir) == 0 ||
+ _dbus_string_get_length (next_component) == 0)
+ return TRUE;
+
+ dir_ends_in_slash = '/' == _dbus_string_get_byte (dir,
+ _dbus_string_get_length (dir) - 1);
+
+ file_starts_with_slash = '/' == _dbus_string_get_byte (next_component, 0);
+
+ if (dir_ends_in_slash && file_starts_with_slash)
+ {
+ _dbus_string_shorten (dir, 1);
+ }
+ else if (!(dir_ends_in_slash || file_starts_with_slash))
+ {
+ if (!_dbus_string_append_byte (dir, '/'))
+ return FALSE;
+ }
+
+ return _dbus_string_copy (next_component, 0, dir,
+ _dbus_string_get_length (dir));
+}
+
+/** nanoseconds in a second */
+#define NANOSECONDS_PER_SECOND 1000000000
+/** microseconds in a second */
+#define MICROSECONDS_PER_SECOND 1000000
+/** milliseconds in a second */
+#define MILLISECONDS_PER_SECOND 1000
+/** nanoseconds in a millisecond */
+#define NANOSECONDS_PER_MILLISECOND 1000000
+/** microseconds in a millisecond */
+#define MICROSECONDS_PER_MILLISECOND 1000
+
+/**
+ * Sleeps the given number of milliseconds.
+ * @param milliseconds number of milliseconds
+ */
+void
+_dbus_sleep_milliseconds (int milliseconds)
+{
+#ifdef HAVE_NANOSLEEP
+ struct timespec req;
+ struct timespec rem;
+
+ req.tv_sec = milliseconds / MILLISECONDS_PER_SECOND;
+ req.tv_nsec = (milliseconds % MILLISECONDS_PER_SECOND) * NANOSECONDS_PER_MILLISECOND;
+ rem.tv_sec = 0;
+ rem.tv_nsec = 0;
+
+ while (nanosleep (&req, &rem) < 0 && errno == EINTR)
+ req = rem;
+#elif defined (HAVE_USLEEP)
+ usleep (milliseconds * MICROSECONDS_PER_MILLISECOND);
+#else /* ! HAVE_USLEEP */
+ sleep (MAX (milliseconds / 1000, 1));
+#endif
+}
+
+static dbus_bool_t
+_dbus_generate_pseudorandom_bytes (DBusString *str,
+ int n_bytes)
+{
+ int old_len;
+ char *p;
+
+ old_len = _dbus_string_get_length (str);
+
+ if (!_dbus_string_lengthen (str, n_bytes))
+ return FALSE;
+
+ p = _dbus_string_get_data_len (str, old_len, n_bytes);
+
+ _dbus_generate_pseudorandom_bytes_buffer (p, n_bytes);
+
+ return TRUE;
+}
+
+/**
+ * Generates the given number of random bytes,
+ * using the best mechanism we can come up with.
+ *
+ * @param str the string
+ * @param n_bytes the number of random bytes to append to string
+ * @returns #TRUE on success, #FALSE if no memory
+ */
+dbus_bool_t
+_dbus_generate_random_bytes (DBusString *str,
+ int n_bytes)
+{
+ int old_len;
+ int fd;
+
+ /* FALSE return means "no memory", if it could
+ * mean something else then we'd need to return
+ * a DBusError. So we always fall back to pseudorandom
+ * if the I/O fails.
+ */
+
+ old_len = _dbus_string_get_length (str);
+ fd = -1;
+
+ /* note, urandom on linux will fall back to pseudorandom */
+ fd = open ("/dev/urandom", O_RDONLY);
+ if (fd < 0)
+ return _dbus_generate_pseudorandom_bytes (str, n_bytes);
+
+ _dbus_verbose ("/dev/urandom fd %d opened\n", fd);
+
+ if (_dbus_read (fd, str, n_bytes) != n_bytes)
+ {
+ _dbus_close (fd, NULL);
+ _dbus_string_set_length (str, old_len);
+ return _dbus_generate_pseudorandom_bytes (str, n_bytes);
+ }
+
+ _dbus_verbose ("Read %d bytes from /dev/urandom\n",
+ n_bytes);
+
+ _dbus_close (fd, NULL);
+
+ return TRUE;
+}
+
+/**
+ * Exit the process, returning the given value.
+ *
+ * @param code the exit code
+ */
+void
+_dbus_exit (int code)
+{
+ _exit (code);
+}
+
+/**
+ * A wrapper around strerror() because some platforms
+ * may be lame and not have strerror(). Also, never
+ * returns NULL.
+ *
+ * @param error_number errno.
+ * @returns error description.
+ */
+const char*
+_dbus_strerror (int error_number)
+{
+ const char *msg;
+
+ msg = strerror (error_number);
+ if (msg == NULL)
+ msg = "unknown";
+
+ return msg;
+}
+
+/**
+ * signal (SIGPIPE, SIG_IGN);
+ */
+void
+_dbus_disable_sigpipe (void)
+{
+ signal (SIGPIPE, SIG_IGN);
+}
+
+/**
+ * Sets the file descriptor to be close
+ * on exec. Should be called for all file
+ * descriptors in D-Bus code.
+ *
+ * @param fd the file descriptor
+ */
+void
+_dbus_fd_set_close_on_exec (int fd)
+{
+ int val;
+
+ val = fcntl (fd, F_GETFD, 0);
+
+ if (val < 0)
+ return;
+
+ val |= FD_CLOEXEC;
+
+ fcntl (fd, F_SETFD, val);
+}
+
+/**
+ * Closes a file descriptor.
+ *
+ * @param fd the file descriptor
+ * @param error error object
+ * @returns #FALSE if error set
+ */
+dbus_bool_t
+_dbus_close (int fd,
+ DBusError *error)
+{
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ again:
+ if (close (fd) < 0)
+ {
+ if (errno == EINTR)
+ goto again;
+
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Could not close fd %d", fd);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Sets a file descriptor to be nonblocking.
+ *
+ * @param fd the file descriptor.
+ * @param error address of error location.
+ * @returns #TRUE on success.
+ */
+dbus_bool_t
+_dbus_set_fd_nonblocking (int fd,
+ DBusError *error)
+{
+ int val;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ val = fcntl (fd, F_GETFL, 0);
+ if (val < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to get flags from file descriptor %d: %s",
+ fd, _dbus_strerror (errno));
+ _dbus_verbose ("Failed to get flags for fd %d: %s\n", fd,
+ _dbus_strerror (errno));
+ return FALSE;
+ }
+
+ if (fcntl (fd, F_SETFL, val | O_NONBLOCK) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to set nonblocking flag of file descriptor %d: %s",
+ fd, _dbus_strerror (errno));
+ _dbus_verbose ("Failed to set fd %d nonblocking: %s\n",
+ fd, _dbus_strerror (errno));
+
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * On GNU libc systems, print a crude backtrace to stderr. On other
+ * systems, print "no backtrace support" and block for possible gdb
+ * attachment if an appropriate environment variable is set.
+ */
+void
+_dbus_print_backtrace (void)
+{
+#if defined (HAVE_BACKTRACE) && defined (DBUS_BUILT_R_DYNAMIC)
+ void *bt[500];
+ int bt_size;
+ int i;
+ char **syms;
+
+ bt_size = backtrace (bt, 500);
+
+ syms = backtrace_symbols (bt, bt_size);
+
+ i = 0;
+ while (i < bt_size)
+ {
+ /* don't use dbus_warn since it can _dbus_abort() */
+ fprintf (stderr, " %s\n", syms[i]);
+ ++i;
+ }
+ fflush (stderr);
+
+ free (syms);
+#elif defined (HAVE_BACKTRACE) && ! defined (DBUS_BUILT_R_DYNAMIC)
+ fprintf (stderr, " D-Bus not built with -rdynamic so unable to print a backtrace\n");
+#else
+ fprintf (stderr, " D-Bus not compiled with backtrace support so unable to print a backtrace\n");
+#endif
+}
+
+/**
+ * Creates a full-duplex pipe (as in socketpair()).
+ * Sets both ends of the pipe nonblocking.
+ *
+ * @todo libdbus only uses this for the debug-pipe server, so in
+ * principle it could be in dbus-sysdeps-util.c, except that
+ * dbus-sysdeps-util.c isn't in libdbus when tests are enabled and the
+ * debug-pipe server is used.
+ *
+ * @param fd1 return location for one end
+ * @param fd2 return location for the other end
+ * @param blocking #TRUE if pipe should be blocking
+ * @param error error return
+ * @returns #FALSE on failure (if error is set)
+ */
+dbus_bool_t
+_dbus_full_duplex_pipe (int *fd1,
+ int *fd2,
+ dbus_bool_t blocking,
+ DBusError *error)
+{
+#ifdef HAVE_SOCKETPAIR
+ int fds[2];
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ if (socketpair (AF_UNIX, SOCK_STREAM, 0, fds) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Could not create full-duplex pipe");
+ return FALSE;
+ }
+
+ if (!blocking &&
+ (!_dbus_set_fd_nonblocking (fds[0], NULL) ||
+ !_dbus_set_fd_nonblocking (fds[1], NULL)))
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Could not set full-duplex pipe nonblocking");
+
+ _dbus_close (fds[0], NULL);
+ _dbus_close (fds[1], NULL);
+
+ return FALSE;
+ }
+
+ *fd1 = fds[0];
+ *fd2 = fds[1];
+
+ _dbus_verbose ("full-duplex pipe %d <-> %d\n",
+ *fd1, *fd2);
+
+ return TRUE;
+#else
+ _dbus_warn ("_dbus_full_duplex_pipe() not implemented on this OS\n");
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "_dbus_full_duplex_pipe() not implemented on this OS");
+ return FALSE;
+#endif
+}
+
+/**
+ * Measure the length of the given format string and arguments,
+ * not including the terminating nul.
+ *
+ * @param format a printf-style format string
+ * @param args arguments for the format string
+ * @returns length of the given format string and args
+ */
+int
+_dbus_printf_string_upper_bound (const char *format,
+ va_list args)
+{
+ char c;
+ return vsnprintf (&c, 1, format, args);
+}
+
+/**
+ * Gets the temporary files directory by inspecting the environment variables
+ * TMPDIR, TMP, and TEMP in that order. If none of those are set "/tmp" is returned
+ *
+ * @returns location of temp directory
+ */
+const char*
+_dbus_get_tmpdir(void)
+{
+ static const char* tmpdir = NULL;
+
+ if (tmpdir == NULL)
+ {
+ /* TMPDIR is what glibc uses, then
+ * glibc falls back to the P_tmpdir macro which
+ * just expands to "/tmp"
+ */
+ if (tmpdir == NULL)
+ tmpdir = getenv("TMPDIR");
+
+ /* These two env variables are probably
+ * broken, but maybe some OS uses them?
+ */
+ if (tmpdir == NULL)
+ tmpdir = getenv("TMP");
+ if (tmpdir == NULL)
+ tmpdir = getenv("TEMP");
+
+ /* And this is the sane fallback. */
+ if (tmpdir == NULL)
+ tmpdir = "/tmp";
+ }
+
+ _dbus_assert(tmpdir != NULL);
+
+ return tmpdir;
+}
+
+/**
+ * Determines the address of the session bus by querying a
+ * platform-specific method.
+ *
+ * If successful, returns #TRUE and appends the address to @p
+ * address. If a failure happens, returns #FALSE and
+ * sets an error in @p error.
+ *
+ * @param address a DBusString where the address can be stored
+ * @param error a DBusError to store the error in case of failure
+ * @returns #TRUE on success, #FALSE if an error happened
+ */
+dbus_bool_t
+_dbus_get_autolaunch_address (DBusString *address,
+ DBusError *error)
+{
+ static char *argv[6];
+ int address_pipe[2] = { -1, -1 };
+ int errors_pipe[2] = { -1, -1 };
+ pid_t pid;
+ int ret;
+ int status;
+ int orig_len;
+ int i;
+ DBusString uuid;
+ dbus_bool_t retval;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+ retval = FALSE;
+
+ if (!_dbus_string_init (&uuid))
+ {
+ _DBUS_SET_OOM (error);
+ return FALSE;
+ }
+
+ if (!_dbus_get_local_machine_uuid_encoded (&uuid))
+ {
+ _DBUS_SET_OOM (error);
+ goto out;
+ }
+
+ i = 0;
+ argv[i] = "dbus-launch";
+ ++i;
+ argv[i] = "--autolaunch";
+ ++i;
+ argv[i] = _dbus_string_get_data (&uuid);
+ ++i;
+ argv[i] = "--binary-syntax";
+ ++i;
+ argv[i] = "--close-stderr";
+ ++i;
+ argv[i] = NULL;
+ ++i;
+
+ _dbus_assert (i == _DBUS_N_ELEMENTS (argv));
+
+ orig_len = _dbus_string_get_length (address);
+
+#define READ_END 0
+#define WRITE_END 1
+ if (pipe (address_pipe) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to create a pipe: %s",
+ _dbus_strerror (errno));
+ _dbus_verbose ("Failed to create a pipe to call dbus-launch: %s\n",
+ _dbus_strerror (errno));
+ goto out;
+ }
+ if (pipe (errors_pipe) < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to create a pipe: %s",
+ _dbus_strerror (errno));
+ _dbus_verbose ("Failed to create a pipe to call dbus-launch: %s\n",
+ _dbus_strerror (errno));
+ goto out;
+ }
+
+ pid = fork ();
+ if (pid < 0)
+ {
+ dbus_set_error (error, _dbus_error_from_errno (errno),
+ "Failed to fork(): %s",
+ _dbus_strerror (errno));
+ _dbus_verbose ("Failed to fork() to call dbus-launch: %s\n",
+ _dbus_strerror (errno));
+ goto out;
+ }
+
+ if (pid == 0)
+ {
+ /* child process */
+ int maxfds;
+ int fd;
+
+ fd = open ("/dev/null", O_RDWR);
+ if (fd == -1)
+ /* huh?! can't open /dev/null? */
+ _exit (1);
+
+ _dbus_verbose ("/dev/null fd %d opened\n", fd);
+
+ /* set-up stdXXX */
+ close (address_pipe[READ_END]);
+ close (errors_pipe[READ_END]);
+ close (0); /* close stdin */
+ close (1); /* close stdout */
+ close (2); /* close stderr */
+
+ if (dup2 (fd, 0) == -1)
+ _exit (1);
+ if (dup2 (address_pipe[WRITE_END], 1) == -1)
+ _exit (1);
+ if (dup2 (errors_pipe[WRITE_END], 2) == -1)
+ _exit (1);
+
+ maxfds = sysconf (_SC_OPEN_MAX);
+ /* Pick something reasonable if for some reason sysconf
+ * says unlimited.
+ */
+ if (maxfds < 0)
+ maxfds = 1024;
+ /* close all inherited fds */
+ for (i = 3; i < maxfds; i++)
+ close (i);
+
+ execv (DBUS_BINDIR "/dbus-launch", argv);
+
+ /* failed, try searching PATH */
+ execvp ("dbus-launch", argv);
+
+ /* still nothing, we failed */
+ _exit (1);
+ }
+
+ /* parent process */
+ close (address_pipe[WRITE_END]);
+ close (errors_pipe[WRITE_END]);
+ address_pipe[WRITE_END] = -1;
+ errors_pipe[WRITE_END] = -1;
+
+ ret = 0;
+ do
+ {
+ ret = _dbus_read (address_pipe[READ_END], address, 1024);
+ }
+ while (ret > 0);
+
+ /* reap the child process to avoid it lingering as zombie */
+ do
+ {
+ ret = waitpid (pid, &status, 0);
+ }
+ while (ret == -1 && errno == EINTR);
+
+ /* We succeeded if the process exited with status 0 and
+ anything was read */
+ if (!WIFEXITED (status) || WEXITSTATUS (status) != 0 ||
+ _dbus_string_get_length (address) == orig_len)
+ {
+ /* The process ended with error */
+ DBusString error_message;
+ _dbus_string_init (&error_message);
+ ret = 0;
+ do
+ {
+ ret = _dbus_read (errors_pipe[READ_END], &error_message, 1024);
+ }
+ while (ret > 0);
+
+ _dbus_string_set_length (address, orig_len);
+ if (_dbus_string_get_length (&error_message) > 0)
+ dbus_set_error (error, DBUS_ERROR_SPAWN_EXEC_FAILED,
+ "dbus-launch failed to autolaunch D-Bus session: %s",
+ _dbus_string_get_data (&error_message));
+ else
+ dbus_set_error (error, DBUS_ERROR_SPAWN_EXEC_FAILED,
+ "Failed to execute dbus-launch to autolaunch D-Bus session");
+ goto out;
+ }
+
+ retval = TRUE;
+
+ out:
+ if (retval)
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+ else
+ _DBUS_ASSERT_ERROR_IS_SET (error);
+
+ if (address_pipe[0] != -1)
+ close (address_pipe[0]);
+ if (address_pipe[1] != -1)
+ close (address_pipe[1]);
+ if (errors_pipe[0] != -1)
+ close (errors_pipe[0]);
+ if (errors_pipe[1] != -1)
+ close (errors_pipe[1]);
+
+ _dbus_string_free (&uuid);
+ return retval;
+}
+
+/**
+ * Reads the uuid of the machine we're running on from
+ * the dbus configuration. Optionally try to create it
+ * (only root can do this usually).
+ *
+ * On UNIX, reads a file that gets created by dbus-uuidgen
+ * in a post-install script. On Windows, if there's a standard
+ * machine uuid we could just use that, but I can't find one
+ * with the right properties (the hardware profile guid can change
+ * without rebooting I believe). If there's no standard one
+ * we might want to use the registry instead of a file for
+ * this, and I'm not sure how we'd ensure the uuid gets created.
+ *
+ * @param machine_id guid to init with the machine's uuid
+ * @param create_if_not_found try to create the uuid if it doesn't exist
+ * @param error the error return
+ * @returns #FALSE if the error is set
+ */
+dbus_bool_t
+_dbus_read_local_machine_uuid (DBusGUID *machine_id,
+ dbus_bool_t create_if_not_found,
+ DBusError *error)
+{
+ DBusString filename;
+ _dbus_string_init_const (&filename, DBUS_MACHINE_UUID_FILE);
+ return _dbus_read_uuid_file (&filename, machine_id, create_if_not_found, error);
+}
+
+#define DBUS_UNIX_STANDARD_SESSION_SERVICEDIR "/dbus-1/services"
+#define DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR "/dbus-1/system-services"
+
+
+/**
+ * Returns the standard directories for a session bus to look for service
+ * activation files
+ *
+ * On UNIX this should be the standard xdg freedesktop.org data directories:
+ *
+ * XDG_DATA_HOME=${XDG_DATA_HOME-$HOME/.local/share}
+ * XDG_DATA_DIRS=${XDG_DATA_DIRS-/usr/local/share:/usr/share}
+ *
+ * and
+ *
+ * DBUS_DATADIR
+ *
+ * @param dirs the directory list we are returning
+ * @returns #FALSE on OOM
+ */
+
+dbus_bool_t
+_dbus_get_standard_session_servicedirs (DBusList **dirs)
+{
+ const char *xdg_data_home;
+ const char *xdg_data_dirs;
+ DBusString servicedir_path;
+
+ if (!_dbus_string_init (&servicedir_path))
+ return FALSE;
+
+ xdg_data_home = _dbus_getenv ("XDG_DATA_HOME");
+ xdg_data_dirs = _dbus_getenv ("XDG_DATA_DIRS");
+
+ if (xdg_data_dirs != NULL)
+ {
+ if (!_dbus_string_append (&servicedir_path, xdg_data_dirs))
+ goto oom;
+
+ if (!_dbus_string_append (&servicedir_path, ":"))
+ goto oom;
+ }
+ else
+ {
+ if (!_dbus_string_append (&servicedir_path, "/usr/local/share:/usr/share:"))
+ goto oom;
+ }
+
+ /*
+ * add configured datadir to defaults
+ * this may be the same as an xdg dir
+ * however the config parser should take
+ * care of duplicates
+ */
+ if (!_dbus_string_append (&servicedir_path, DBUS_DATADIR":"))
+ goto oom;
+
+ if (xdg_data_home != NULL)
+ {
+ if (!_dbus_string_append (&servicedir_path, xdg_data_home))
+ goto oom;
+ }
+ else
+ {
+ const DBusString *homedir;
+ DBusString local_share;
+
+ if (!_dbus_homedir_from_current_process (&homedir))
+ goto oom;
+
+ if (!_dbus_string_append (&servicedir_path, _dbus_string_get_const_data (homedir)))
+ goto oom;
+
+ _dbus_string_init_const (&local_share, "/.local/share");
+ if (!_dbus_concat_dir_and_file (&servicedir_path, &local_share))
+ goto oom;
+ }
+
+ if (!_dbus_split_paths_and_append (&servicedir_path,
+ DBUS_UNIX_STANDARD_SESSION_SERVICEDIR,
+ dirs))
+ goto oom;
+
+ _dbus_string_free (&servicedir_path);
+ return TRUE;
+
+ oom:
+ _dbus_string_free (&servicedir_path);
+ return FALSE;
+}
+
+
+/**
+ * Returns the standard directories for a system bus to look for service
+ * activation files
+ *
+ * On UNIX this should be the standard xdg freedesktop.org data directories:
+ *
+ * XDG_DATA_DIRS=${XDG_DATA_DIRS-/usr/local/share:/usr/share}
+ *
+ * and
+ *
+ * DBUS_DATADIR
+ *
+ * On Windows there is no system bus and this function can return nothing.
+ *
+ * @param dirs the directory list we are returning
+ * @returns #FALSE on OOM
+ */
+
+dbus_bool_t
+_dbus_get_standard_system_servicedirs (DBusList **dirs)
+{
+ const char *xdg_data_dirs;
+ DBusString servicedir_path;
+
+ if (!_dbus_string_init (&servicedir_path))
+ return FALSE;
+
+ xdg_data_dirs = _dbus_getenv ("XDG_DATA_DIRS");
+
+ if (xdg_data_dirs != NULL)
+ {
+ if (!_dbus_string_append (&servicedir_path, xdg_data_dirs))
+ goto oom;
+
+ if (!_dbus_string_append (&servicedir_path, ":"))
+ goto oom;
+ }
+ else
+ {
+ if (!_dbus_string_append (&servicedir_path, "/usr/local/share:/usr/share:"))
+ goto oom;
+ }
+
+ /*
+ * add configured datadir to defaults
+ * this may be the same as an xdg dir
+ * however the config parser should take
+ * care of duplicates
+ */
+ if (!_dbus_string_append (&servicedir_path, DBUS_DATADIR":"))
+ goto oom;
+
+ if (!_dbus_split_paths_and_append (&servicedir_path,
+ DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR,
+ dirs))
+ goto oom;
+
+ _dbus_string_free (&servicedir_path);
+ return TRUE;
+
+ oom:
+ _dbus_string_free (&servicedir_path);
+ return FALSE;
+}
+
+/**
+ * Append the absolute path of the system.conf file
+ * (there is no system bus on Windows so this can just
+ * return FALSE and print a warning or something)
+ *
+ * @param str the string to append to
+ * @returns #FALSE if no memory
+ */
+dbus_bool_t
+_dbus_append_system_config_file (DBusString *str)
+{
+ return _dbus_string_append (str, DBUS_SYSTEM_CONFIG_FILE);
+}
+
+/**
+ * Append the absolute path of the session.conf file.
+ *
+ * @param str the string to append to
+ * @returns #FALSE if no memory
+ */
+dbus_bool_t
+_dbus_append_session_config_file (DBusString *str)
+{
+ return _dbus_string_append (str, DBUS_SESSION_CONFIG_FILE);
+}
+
+/**
+ * Called when the bus daemon is signaled to reload its configuration; any
+ * caches should be nuked. Of course any caches that need explicit reload
+ * are probably broken, but c'est la vie.
+ *
+ *
+ */
+void
+_dbus_flush_caches (void)
+{
+ _dbus_user_database_flush_system ();
+}
+
+/**
+ * Appends the directory in which a keyring for the given credentials
+ * should be stored. The credentials should have either a Windows or
+ * UNIX user in them. The directory should be an absolute path.
+ *
+ * On UNIX the directory is ~/.dbus-keyrings while on Windows it should probably
+ * be something else, since the dotfile convention is not normal on Windows.
+ *
+ * @param directory string to append directory to
+ * @param credentials credentials the directory should be for
+ *
+ * @returns #FALSE on no memory
+ */
+dbus_bool_t
+_dbus_append_keyring_directory_for_credentials (DBusString *directory,
+ DBusCredentials *credentials)
+{
+ DBusString homedir;
+ DBusString dotdir;
+ dbus_uid_t uid;
+
+ _dbus_assert (credentials != NULL);
+ _dbus_assert (!_dbus_credentials_are_anonymous (credentials));
+
+ if (!_dbus_string_init (&homedir))
+ return FALSE;
+
+ uid = _dbus_credentials_get_unix_uid (credentials);
+ _dbus_assert (uid != DBUS_UID_UNSET);
+
+ if (!_dbus_homedir_from_uid (uid, &homedir))
+ goto failed;
+
+#ifdef DBUS_BUILD_TESTS
+ {
+ const char *override;
+
+ override = _dbus_getenv ("DBUS_TEST_HOMEDIR");
+ if (override != NULL && *override != '\0')
+ {
+ _dbus_string_set_length (&homedir, 0);
+ if (!_dbus_string_append (&homedir, override))
+ goto failed;
+
+ _dbus_verbose ("Using fake homedir for testing: %s\n",
+ _dbus_string_get_const_data (&homedir));
+ }
+ else
+ {
+ static dbus_bool_t already_warned = FALSE;
+ if (!already_warned)
+ {
+ _dbus_warn ("Using your real home directory for testing, set DBUS_TEST_HOMEDIR to avoid\n");
+ already_warned = TRUE;
+ }
+ }
+ }
+#endif
+
+ _dbus_string_init_const (&dotdir, ".dbus-keyrings");
+ if (!_dbus_concat_dir_and_file (&homedir,
+ &dotdir))
+ goto failed;
+
+ if (!_dbus_string_copy (&homedir, 0,
+ directory, _dbus_string_get_length (directory))) {
+ goto failed;
+ }
+
+ _dbus_string_free (&homedir);
+ return TRUE;
+
+ failed:
+ _dbus_string_free (&homedir);
+ return FALSE;
+}
+
+
+/**
+ * See if errno is EAGAIN or EWOULDBLOCK (this has to be done differently
+ * for Winsock so is abstracted)
+ *
+ * @returns #TRUE if errno == EAGAIN or errno == EWOULDBLOCK
+ */
+dbus_bool_t
+_dbus_get_is_errno_eagain_or_ewouldblock (void)
+{
+ return errno == EAGAIN || errno == EWOULDBLOCK;
+}
+
+/* tests in dbus-sysdeps-util.c */
projects / monky / blobdiff