--- /dev/null
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/* dbus-sysdeps.h Wrappers around system/libc features (internal to D-Bus implementation)
+ *
+ * Copyright (C) 2002, 2003 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
+ *
+ */
+
+#ifndef DBUS_SYSDEPS_H
+#define DBUS_SYSDEPS_H
+
+#include <config.h>
+
+#include <dbus/dbus-errors.h>
+
+/* this is perhaps bogus, but strcmp() etc. are faster if we use the
+ * stuff straight out of string.h, so have this here for now.
+ */
+#include <string.h>
+#include <stdarg.h>
+
+
+/* AIX sys/poll.h does #define events reqevents, and other
+ * wonderousness, so must include sys/poll before declaring
+ * DBusPollFD
+ */
+#ifdef HAVE_POLL
+#include <sys/poll.h>
+#endif
+
+DBUS_BEGIN_DECLS
+
+#ifdef DBUS_WIN
+#define _DBUS_PATH_SEPARATOR ";"
+#else
+#define _DBUS_PATH_SEPARATOR ":"
+#endif
+
+/* Forward declarations */
+
+/** An opaque string type */
+typedef struct DBusString DBusString;
+
+/** An opaque list type */
+typedef struct DBusList DBusList;
+
+/** Object that contains a list of credentials such as UNIX or Windows user ID */
+typedef struct DBusCredentials DBusCredentials;
+
+/**
+ * @addtogroup DBusSysdeps
+ *
+ * @{
+ */
+
+/* The idea of this file is to encapsulate everywhere that we're
+ * relying on external libc features, for ease of security
+ * auditing. The idea is from vsftpd. This also gives us a chance to
+ * make things more convenient to use, e.g. by reading into a
+ * DBusString. Operating system headers aren't intended to be used
+ * outside of this file and a limited number of others (such as
+ * dbus-memory.c)
+ */
+
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
+#define _DBUS_GNUC_PRINTF( format_idx, arg_idx ) \
+ __attribute__((__format__ (__printf__, format_idx, arg_idx)))
+#define _DBUS_GNUC_NORETURN \
+ __attribute__((__noreturn__))
+#else /* !__GNUC__ */
+#define _DBUS_GNUC_PRINTF( format_idx, arg_idx )
+#define _DBUS_GNUC_NORETURN
+#endif /* !__GNUC__ */
+
+/** @def _DBUS_GNUC_PRINTF
+ * used to tell gcc about printf format strings
+ */
+/** @def _DBUS_GNUC_NORETURN
+ * used to tell gcc about functions that never return, such as _dbus_abort()
+ */
+
+void _dbus_abort (void) _DBUS_GNUC_NORETURN;
+
+const char* _dbus_getenv (const char *varname);
+dbus_bool_t _dbus_setenv (const char *varname,
+ const char *value);
+dbus_bool_t _dbus_clearenv (void);
+char ** _dbus_get_environment (void);
+
+/** A process ID */
+typedef unsigned long dbus_pid_t;
+/** A user ID */
+typedef unsigned long dbus_uid_t;
+/** A group ID */
+typedef unsigned long dbus_gid_t;
+
+/** an invalid PID used to represent an uninitialized dbus_pid_t field */
+#define DBUS_PID_UNSET ((dbus_pid_t) -1)
+/** an invalid UID used to represent an uninitialized dbus_uid_t field */
+#define DBUS_UID_UNSET ((dbus_uid_t) -1)
+/** an invalid GID used to represent an uninitialized dbus_gid_t field */
+#define DBUS_GID_UNSET ((dbus_gid_t) -1)
+
+/** an appropriate printf format for dbus_pid_t */
+#define DBUS_PID_FORMAT "%lu"
+/** an appropriate printf format for dbus_uid_t */
+#define DBUS_UID_FORMAT "%lu"
+/** an appropriate printf format for dbus_gid_t */
+#define DBUS_GID_FORMAT "%lu"
+
+
+/**
+ * Socket interface
+ *
+ * @todo Use for the file descriptors a struct
+ * - struct DBusSocket{ int d; }; -
+ * instead of int to get type-safety which
+ * will be checked by the compiler.
+ *
+ */
+
+dbus_bool_t _dbus_open_tcp_socket (int *fd,
+ DBusError *error);
+dbus_bool_t _dbus_close_socket (int fd,
+ DBusError *error);
+int _dbus_read_socket (int fd,
+ DBusString *buffer,
+ int count);
+int _dbus_write_socket (int fd,
+ const DBusString *buffer,
+ int start,
+ int len);
+int _dbus_write_socket_two (int fd,
+ const DBusString *buffer1,
+ int start1,
+ int len1,
+ const DBusString *buffer2,
+ int start2,
+ int len2);
+int _dbus_connect_tcp_socket (const char *host,
+ const char *port,
+ const char *family,
+ DBusError *error);
+int _dbus_listen_tcp_socket (const char *host,
+ const char *port,
+ const char *family,
+ DBusString *retport,
+ int **fds_p,
+ DBusError *error);
+int _dbus_accept (int listen_fd);
+
+
+dbus_bool_t _dbus_read_credentials_socket (int client_fd,
+ DBusCredentials *credentials,
+ DBusError *error);
+dbus_bool_t _dbus_send_credentials_socket (int server_fd,
+ DBusError *error);
+
+dbus_bool_t _dbus_credentials_add_from_user (DBusCredentials *credentials,
+ const DBusString *username);
+dbus_bool_t _dbus_credentials_add_from_current_process (DBusCredentials *credentials);
+dbus_bool_t _dbus_append_user_from_current_process (DBusString *str);
+
+dbus_bool_t _dbus_parse_unix_user_from_config (const DBusString *username,
+ dbus_uid_t *uid_p);
+dbus_bool_t _dbus_parse_unix_group_from_config (const DBusString *groupname,
+ dbus_gid_t *gid_p);
+dbus_bool_t _dbus_unix_groups_from_uid (dbus_uid_t uid,
+ dbus_gid_t **group_ids,
+ int *n_group_ids);
+dbus_bool_t _dbus_unix_user_is_at_console (dbus_uid_t uid,
+ DBusError *error);
+dbus_bool_t _dbus_unix_user_is_process_owner (dbus_uid_t uid);
+dbus_bool_t _dbus_windows_user_is_process_owner (const char *windows_sid);
+
+dbus_bool_t _dbus_append_keyring_directory_for_credentials (DBusString *directory,
+ DBusCredentials *credentials);
+
+/** Opaque type representing an atomically-modifiable integer
+ * that can be used from multiple threads.
+ */
+typedef struct DBusAtomic DBusAtomic;
+
+/**
+ * An atomic integer safe to increment or decrement from multiple threads.
+ */
+struct DBusAtomic
+{
+#ifdef DBUS_WIN
+ volatile long value; /**< Value of the atomic integer. */
+#else
+ volatile dbus_int32_t value; /**< Value of the atomic integer. */
+#endif
+};
+
+/* The value we get from autofoo is in the form of a cpp expression;
+ * convert that to a conventional defined/undef switch. (We can't get
+ * the conventional defined/undef because of multiarch builds only running
+ * ./configure once, on Darwin.) */
+#if DBUS_HAVE_ATOMIC_INT_COND
+# define DBUS_HAVE_ATOMIC_INT 1
+#else
+# undef DBUS_HAVE_ATOMIC_INT
+#endif
+
+dbus_int32_t _dbus_atomic_inc (DBusAtomic *atomic);
+dbus_int32_t _dbus_atomic_dec (DBusAtomic *atomic);
+
+
+/* AIX uses different values for poll */
+
+#ifdef _AIX
+/** There is data to read */
+#define _DBUS_POLLIN 0x0001
+/** There is urgent data to read */
+#define _DBUS_POLLPRI 0x0004
+/** Writing now will not block */
+#define _DBUS_POLLOUT 0x0002
+/** Error condition */
+#define _DBUS_POLLERR 0x4000
+/** Hung up */
+#define _DBUS_POLLHUP 0x2000
+/** Invalid request: fd not open */
+#define _DBUS_POLLNVAL 0x8000
+#else
+/** There is data to read */
+#define _DBUS_POLLIN 0x0001
+/** There is urgent data to read */
+#define _DBUS_POLLPRI 0x0002
+/** Writing now will not block */
+#define _DBUS_POLLOUT 0x0004
+/** Error condition */
+#define _DBUS_POLLERR 0x0008
+/** Hung up */
+#define _DBUS_POLLHUP 0x0010
+/** Invalid request: fd not open */
+#define _DBUS_POLLNVAL 0x0020
+#endif
+
+/**
+ * A portable struct pollfd wrapper.
+ */
+typedef struct
+{
+ int fd; /**< File descriptor */
+ short events; /**< Events to poll for */
+ short revents; /**< Events that occurred */
+} DBusPollFD;
+
+int _dbus_poll (DBusPollFD *fds,
+ int n_fds,
+ int timeout_milliseconds);
+
+void _dbus_sleep_milliseconds (int milliseconds);
+
+void _dbus_get_current_time (long *tv_sec,
+ long *tv_usec);
+
+/**
+ * File/directory interface
+ */
+dbus_bool_t _dbus_file_exists (const char *file);
+dbus_bool_t _dbus_file_get_contents (DBusString *str,
+ const DBusString *filename,
+ DBusError *error);
+dbus_bool_t _dbus_string_save_to_file (const DBusString *str,
+ const DBusString *filename,
+ DBusError *error);
+
+dbus_bool_t _dbus_make_file_world_readable (const DBusString *filename,
+ DBusError *error);
+
+dbus_bool_t _dbus_create_file_exclusively (const DBusString *filename,
+ DBusError *error);
+dbus_bool_t _dbus_delete_file (const DBusString *filename,
+ DBusError *error);
+dbus_bool_t _dbus_create_directory (const DBusString *filename,
+ DBusError *error);
+dbus_bool_t _dbus_delete_directory (const DBusString *filename,
+ DBusError *error);
+
+dbus_bool_t _dbus_concat_dir_and_file (DBusString *dir,
+ const DBusString *next_component);
+dbus_bool_t _dbus_string_get_dirname (const DBusString *filename,
+ DBusString *dirname);
+dbus_bool_t _dbus_path_is_absolute (const DBusString *filename);
+
+dbus_bool_t _dbus_get_standard_session_servicedirs (DBusList **dirs);
+dbus_bool_t _dbus_get_standard_system_servicedirs (DBusList **dirs);
+
+dbus_bool_t _dbus_append_system_config_file (DBusString *str);
+dbus_bool_t _dbus_append_session_config_file (DBusString *str);
+
+typedef struct {
+ int fd_or_handle;
+} DBusPipe;
+
+void _dbus_pipe_init (DBusPipe *pipe,
+ int fd);
+void _dbus_pipe_init_stdout (DBusPipe *pipe);
+int _dbus_pipe_write (DBusPipe *pipe,
+ const DBusString *buffer,
+ int start,
+ int len,
+ DBusError *error);
+int _dbus_pipe_close (DBusPipe *pipe,
+ DBusError *error);
+dbus_bool_t _dbus_pipe_is_valid (DBusPipe *pipe);
+void _dbus_pipe_invalidate (DBusPipe *pipe);
+dbus_bool_t _dbus_pipe_is_stdout_or_stderr (DBusPipe *pipe);
+
+
+/** Opaque type for reading a directory listing */
+typedef struct DBusDirIter DBusDirIter;
+
+DBusDirIter* _dbus_directory_open (const DBusString *filename,
+ DBusError *error);
+dbus_bool_t _dbus_directory_get_next_file (DBusDirIter *iter,
+ DBusString *filename,
+ DBusError *error);
+void _dbus_directory_close (DBusDirIter *iter);
+
+dbus_bool_t _dbus_check_dir_is_private_to_user (DBusString *dir,
+ DBusError *error);
+
+void _dbus_fd_set_close_on_exec (int fd);
+
+const char* _dbus_get_tmpdir (void);
+
+/**
+ * Random numbers
+ */
+void _dbus_generate_pseudorandom_bytes_buffer (char *buffer,
+ int n_bytes);
+void _dbus_generate_random_bytes_buffer (char *buffer,
+ int n_bytes);
+dbus_bool_t _dbus_generate_random_bytes (DBusString *str,
+ int n_bytes);
+dbus_bool_t _dbus_generate_random_ascii (DBusString *str,
+ int n_bytes);
+
+const char* _dbus_error_from_errno (int error_number);
+
+void _dbus_set_errno_to_zero (void);
+dbus_bool_t _dbus_get_is_errno_nonzero (void);
+dbus_bool_t _dbus_get_is_errno_eagain_or_ewouldblock (void);
+dbus_bool_t _dbus_get_is_errno_enomem (void);
+dbus_bool_t _dbus_get_is_errno_eintr (void);
+const char* _dbus_strerror_from_errno (void);
+
+void _dbus_disable_sigpipe (void);
+
+
+void _dbus_exit (int code) _DBUS_GNUC_NORETURN;
+
+int _dbus_printf_string_upper_bound (const char *format,
+ va_list args);
+
+
+/**
+ * Portable struct with stat() results
+ */
+typedef struct
+{
+ unsigned long mode; /**< File mode */
+ unsigned long nlink; /**< Number of hard links */
+ dbus_uid_t uid; /**< User owning file */
+ dbus_gid_t gid; /**< Group owning file */
+ unsigned long size; /**< Size of file */
+ unsigned long atime; /**< Access time */
+ unsigned long mtime; /**< Modify time */
+ unsigned long ctime; /**< Creation time */
+} DBusStat;
+
+dbus_bool_t _dbus_stat (const DBusString *filename,
+ DBusStat *statbuf,
+ DBusError *error);
+dbus_bool_t _dbus_full_duplex_pipe (int *fd1,
+ int *fd2,
+ dbus_bool_t blocking,
+ DBusError *error);
+
+void _dbus_print_backtrace (void);
+
+dbus_bool_t _dbus_become_daemon (const DBusString *pidfile,
+ DBusPipe *print_pid_pipe,
+ DBusError *error,
+ dbus_bool_t keep_umask);
+
+dbus_bool_t _dbus_verify_daemon_user (const char *user);
+dbus_bool_t _dbus_change_to_daemon_user (const char *user,
+ DBusError *error);
+
+dbus_bool_t _dbus_write_pid_to_file_and_pipe (const DBusString *pidfile,
+ DBusPipe *print_pid_pipe,
+ dbus_pid_t pid_to_write,
+ DBusError *error);
+
+dbus_bool_t _dbus_command_for_pid (unsigned long pid,
+ DBusString *str,
+ int max_len,
+ DBusError *error);
+
+/** A UNIX signal handler */
+typedef void (* DBusSignalHandler) (int sig);
+
+void _dbus_set_signal_handler (int sig,
+ DBusSignalHandler handler);
+
+dbus_bool_t _dbus_user_at_console (const char *username,
+ DBusError *error);
+
+void _dbus_init_system_log (void);
+void _dbus_log_info (const char *msg, va_list args);
+void _dbus_log_security (const char *msg, va_list args);
+
+/* Define DBUS_VA_COPY() to do the right thing for copying va_list variables.
+ * config.h may have already defined DBUS_VA_COPY as va_copy or __va_copy.
+ */
+#if !defined (DBUS_VA_COPY)
+# if defined (__GNUC__) && defined (__PPC__) && (defined (_CALL_SYSV) || defined (_WIN32))
+# define DBUS_VA_COPY(ap1, ap2) (*(ap1) = *(ap2))
+# elif defined (DBUS_VA_COPY_AS_ARRAY)
+# define DBUS_VA_COPY(ap1, ap2) memcpy ((ap1), (ap2), sizeof (va_list))
+# else /* va_list is a pointer */
+# define DBUS_VA_COPY(ap1, ap2) ((ap1) = (ap2))
+# endif /* va_list is a pointer */
+#endif /* !DBUS_VA_COPY */
+
+
+/**
+ * Casts a primitive C type to a byte array and then indexes
+ * a particular byte of the array.
+ */
+#define _DBUS_BYTE_OF_PRIMITIVE(p, i) \
+ (((const char*)&(p))[(i)])
+/** On x86 there is an 80-bit FPU, and if you do "a == b" it may have a
+ * or b in an 80-bit register, thus failing to compare the two 64-bit
+ * doubles for bitwise equality. So this macro compares the two doubles
+ * bitwise.
+ */
+#define _DBUS_DOUBLES_BITWISE_EQUAL(a, b) \
+ (_DBUS_BYTE_OF_PRIMITIVE (a, 0) == _DBUS_BYTE_OF_PRIMITIVE (b, 0) && \
+ _DBUS_BYTE_OF_PRIMITIVE (a, 1) == _DBUS_BYTE_OF_PRIMITIVE (b, 1) && \
+ _DBUS_BYTE_OF_PRIMITIVE (a, 2) == _DBUS_BYTE_OF_PRIMITIVE (b, 2) && \
+ _DBUS_BYTE_OF_PRIMITIVE (a, 3) == _DBUS_BYTE_OF_PRIMITIVE (b, 3) && \
+ _DBUS_BYTE_OF_PRIMITIVE (a, 4) == _DBUS_BYTE_OF_PRIMITIVE (b, 4) && \
+ _DBUS_BYTE_OF_PRIMITIVE (a, 5) == _DBUS_BYTE_OF_PRIMITIVE (b, 5) && \
+ _DBUS_BYTE_OF_PRIMITIVE (a, 6) == _DBUS_BYTE_OF_PRIMITIVE (b, 6) && \
+ _DBUS_BYTE_OF_PRIMITIVE (a, 7) == _DBUS_BYTE_OF_PRIMITIVE (b, 7))
+
+dbus_bool_t _dbus_get_autolaunch_address (DBusString *address,
+ DBusError *error);
+
+/** Type representing a universally unique ID
+ * @todo rename to UUID instead of GUID
+ */
+typedef union DBusGUID DBusGUID;
+
+dbus_bool_t _dbus_read_local_machine_uuid (DBusGUID *machine_id,
+ dbus_bool_t create_if_not_found,
+ DBusError *error);
+
+/**
+ * Initialize threads as in dbus_threads_init_default(), appropriately
+ * for the platform.
+ * @returns #FALSE if no memory
+ */
+dbus_bool_t _dbus_threads_init_platform_specific (void);
+
+dbus_bool_t _dbus_split_paths_and_append (DBusString *dirs,
+ const char *suffix,
+ DBusList **dir_list);
+
+unsigned long _dbus_pid_for_log (void);
+
+/* FIXME move back to dbus-sysdeps-unix.h probably -
+ * the PID file handling just needs a little more abstraction
+ * in the bus daemon first.
+ */
+dbus_pid_t _dbus_getpid (void);
+
+void _dbus_flush_caches (void);
+
+/** @} */
+
+DBUS_END_DECLS
+
+#endif /* DBUS_SYSDEPS_H */
projects / monky / blobdiff