vcs.maemo.org Git - monky/blob - src/mboxscan.c

   1 /* Conky, a system monitor, based on torsmo
   2  *
   3  * Any original torsmo code is licensed under the BSD license
   4  *
   5  * All code written since the fork of torsmo is licensed under the GPL
   6  *
   7  * Please see COPYING for details
   8  *
   9  * Copyright (c) 2006 Marco Candrian <mac@calmar.ws>
  10  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  11  *      (see AUTHORS)
  12  * All rights reserved.
  13  *
  14  * This program is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation, either version 3 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  *
  26  */
  27
  28 #include "conky.h"
  29 #include "logging.h"
  30 #include "mail.h"
  31 #include <sys/stat.h>
  32 #include <sys/time.h>
  33 #include <errno.h>
  34 #include "mboxscan.h"
  35
  36 #define FROM_WIDTH 10
  37 #define SUBJECT_WIDTH 22
  38 #define PRINT_MAILS 5
  39 #define TIME_DELAY 5
  40
  41 struct ring_list {
  42         char *from;
  43         char *subject;
  44         struct ring_list *previous;
  45         struct ring_list *next;
  46 };
  47
  48 static time_t last_ctime;       /* needed for mutt at least */
  49 static time_t last_mtime;       /* not sure what to test: testing both now */
  50 static double last_update;
  51
  52 static int args_ok = 0;
  53 static int from_width;
  54 static int subject_width;
  55 static int print_mails;
  56 static int time_delay;
  57
  58 static char mbox_mail_spool[DEFAULT_TEXT_BUFFER_SIZE];
  59
  60 void mbox_scan(char *args, char *output, size_t max_len)
  61 {
  62         int i, u, flag;
  63         int force_rescan = 0;
  64         char buf[text_buffer_size];
  65         struct stat statbuf;
  66         struct ring_list *curr = 0, *prev = 0, *startlist = 0;
  67         FILE *fp;
  68
  69         /* output was set to 1 after malloc'ing in conky.c */
  70         /* -> beeing able to test it here for catching SIGUSR1 */
  71         if (output[0] == 1) {
  72                 force_rescan = 1;
  73                 output[0] = '\0';
  74         }
  75
  76         if (!args_ok || force_rescan) {
  77
  78                 char *substr = strstr(args, "-n");
  79
  80                 if (substr) {
  81                         if (sscanf(substr, "-n %i", &print_mails) != 1) {
  82                                 print_mails = PRINT_MAILS;
  83                         }
  84                 } else {
  85                         print_mails = PRINT_MAILS;
  86                 }
  87                 if (print_mails < 1) {
  88                         print_mails = 1;
  89                 }
  90
  91                 substr = strstr(args, "-t");
  92                 if (substr) {
  93                         if (sscanf(substr, "-t %i", &time_delay) != 1) {
  94                                 time_delay = TIME_DELAY;
  95                         }
  96                 } else {
  97                         time_delay = TIME_DELAY;
  98                 }
  99
 100                 substr = strstr(args, "-fw");
 101                 if (substr) {
 102                         if (sscanf(substr, "-fw %i", &from_width) != 1) {
 103                                 from_width = FROM_WIDTH;
 104                         }
 105                 } else {
 106                         from_width = FROM_WIDTH;
 107                 }
 108
 109                 substr = strstr(args, "-sw");
 110                 if (substr) {
 111                         if (sscanf(substr, "-sw %i", &subject_width) != 1) {
 112                                 subject_width = SUBJECT_WIDTH;
 113                         }
 114                 } else {
 115                         subject_width = SUBJECT_WIDTH;
 116                 }
 117                 /* encapsulated with "'s find first occurrence of " */
 118                 if (args[strlen(args) - 1] == '"') {
 119                         char *start;
 120                         strncpy(mbox_mail_spool, args, DEFAULT_TEXT_BUFFER_SIZE);
 121                         start = strchr(mbox_mail_spool, '"') + 1;
 122
 123                         start[(long) (strrchr(mbox_mail_spool, '"') - start)] = '\0';
 124                         strncpy(mbox_mail_spool, start, DEFAULT_TEXT_BUFFER_SIZE);
 125                 } else {
 126                         char *copy_args = strndup(args, text_buffer_size);
 127                         char *tmp = strtok(copy_args, " ");
 128                         char *start = tmp;
 129
 130                         while (tmp) {
 131                                 tmp = strtok(NULL, " ");
 132                                 if (tmp) {
 133                                         start = tmp;
 134                                 }
 135                         }
 136                         strncpy(mbox_mail_spool, start, DEFAULT_TEXT_BUFFER_SIZE);
 137                         free(copy_args);
 138                 }
 139                 if (strlen(mbox_mail_spool) < 1) {
 140                         CRIT_ERR(NULL, NULL, "Usage: ${mboxscan [-n <number of messages to print>] "
 141                                 "[-fw <from width>] [-sw <subject width>] "
 142                                 "[-t <delay in sec> mbox]}");
 143                 }
 144
 145                 /* allowing $MAIL in the config */
 146                 if (!strcmp(mbox_mail_spool, "$MAIL")) {
 147                         strcpy(mbox_mail_spool, current_mail_spool);
 148                 }
 149
 150                 if (stat(mbox_mail_spool, &statbuf)) {
 151                         CRIT_ERR(NULL, NULL, "can't stat %s: %s", mbox_mail_spool, strerror(errno));
 152                 }
 153                 args_ok = 1;    /* args-computing necessary only once */
 154         }
 155
 156         /* if time_delay not yet reached, then return */
 157         if (current_update_time - last_update < time_delay && !force_rescan) {
 158                 return;
 159         }
 160
 161         last_update = current_update_time;
 162
 163         /* mbox still exists? and get stat-infos */
 164         if (stat(mbox_mail_spool, &statbuf)) {
 165                 ERR("can't stat %s: %s", mbox_mail_spool, strerror(errno));
 166                 output[0] = '\0';       /* delete any output */
 167                 return;
 168         }
 169
 170         /* modification time has not changed, so skip scanning the box */
 171         if (statbuf.st_ctime == last_ctime && statbuf.st_mtime == last_mtime
 172                         && !force_rescan) {
 173                 return;
 174         }
 175
 176         last_ctime = statbuf.st_ctime;
 177         last_mtime = statbuf.st_mtime;
 178
 179         /* build up double-linked ring-list to hold data, while scanning down the
 180          * mbox */
 181         for (i = 0; i < print_mails; i++) {
 182                 curr = (struct ring_list *) malloc(sizeof(struct ring_list));
 183                 curr->from = (char *) malloc(sizeof(char[from_width + 1]));
 184                 curr->subject = (char *) malloc(sizeof(char[subject_width + 1]));
 185                 curr->from[0] = '\0';
 186                 curr->subject[0] = '\0';
 187
 188                 if (i == 0) {
 189                         startlist = curr;
 190                 }
 191                 if (i > 0) {
 192                         curr->previous = prev;
 193                         prev->next = curr;
 194                 }
 195                 prev = curr;
 196         }
 197
 198         /* connect end to start for an endless loop-ring */
 199         startlist->previous = curr;
 200         curr->next = startlist;
 201
 202         /* mbox */
 203         fp = fopen(mbox_mail_spool, "r");
 204         if (!fp) {
 205                 return;
 206         }
 207
 208         /* first find a "From " to set it to 0 for header-sarchings */
 209         flag = 1;
 210         while (!feof(fp)) {
 211                 if (fgets(buf, text_buffer_size, fp) == NULL) {
 212                         break;
 213                 }
 214
 215                 if (strncmp(buf, "From ", 5) == 0) {
 216                         curr = curr->next;
 217
 218                         /* skip until \n */
 219                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 220                                 fgets(buf, text_buffer_size, fp);
 221                         }
 222
 223                         flag = 0;       /* in the headers now */
 224                         continue;
 225                 }
 226
 227                 if (flag == 1) {        /* in the body, so skip */
 228                         continue;
 229                 }
 230
 231                 if (buf[0] == '\n') {
 232                         /* beyond the headers now (empty line), skip until \n */
 233                         /* then search for new mail ("From ") */
 234
 235                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 236                                 fgets(buf, text_buffer_size, fp);
 237                         }
 238                         flag = 1;       /* in the body now */
 239                         continue;
 240                 }
 241
 242                 if ((strncmp(buf, "X-Status: ", 10) == 0)
 243                                 || (strncmp(buf, "Status: R", 9) == 0)) {
 244
 245                         /* Mail was read or something, so skip that message */
 246                         flag = 1;       /* search for next From */
 247                         curr->subject[0] = '\0';
 248                         curr->from[0] = '\0';
 249                         /* (will get current again on new 'From ' finding) */
 250                         curr = curr->previous;
 251                         /* Skip until \n */
 252                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 253                                 fgets(buf, text_buffer_size, fp);
 254                         }
 255                         continue;
 256                 }
 257
 258                 /* that covers ^From: and ^from: ^From:<tab> */
 259                 if (strncmp(buf + 1, "rom:", 4) == 0) {
 260
 261                         i = 0;
 262                         u = 6;  /* no "From: " string needed, so skip */
 263                         while (1) {
 264
 265                                 if (buf[u] == '"') {    /* no quotes around names */
 266                                         u++;
 267                                         continue;
 268                                 }
 269
 270                                 /* some are: From: <foo@bar.com> */
 271                                 if (buf[u] == '<' && i > 1) {
 272
 273                                         curr->from[i] = '\0';
 274                                         /* skip until \n */
 275                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 276                                                 fgets(buf, text_buffer_size, fp);
 277                                         }
 278                                         break;
 279                                 }
 280
 281                                 if (buf[u] == '\n') {
 282                                         curr->from[i] = '\0';
 283                                         break;
 284                                 }
 285
 286                                 if (buf[u] == '\0') {
 287                                         curr->from[i] = '\0';
 288                                         break;
 289                                 }
 290
 291                                 if (i >= from_width) {
 292                                         curr->from[i] = '\0';
 293                                         /* skip until \n */
 294                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 295                                                 fgets(buf, text_buffer_size, fp);
 296                                         }
 297                                         break;
 298                                 }
 299
 300                                 /* nothing special so just set it */
 301                                 curr->from[i++] = buf[u++];
 302                         }
 303                 }
 304
 305                 /* that covers ^Subject: and ^subject: and ^Subjec:<tab> */
 306                 if (strncmp(buf + 1, "ubject:", 7) == 0) {
 307
 308                         i = 0;
 309                         u = 9;  /* no "Subject: " string needed, so skip */
 310                         while (1) {
 311
 312                                 if (buf[u] == '\n') {
 313                                         curr->subject[i] = '\0';
 314                                         break;
 315                                 }
 316                                 if (buf[u] == '\0') {
 317                                         curr->subject[i] = '\0';
 318                                         break;
 319                                 }
 320                                 if (i >= subject_width) {
 321                                         curr->subject[i] = '\0';
 322
 323                                         /* skip until \n */
 324                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 325                                                 fgets(buf, text_buffer_size, fp);
 326                                         }
 327                                         break;
 328                                 }
 329
 330                                 /* nothing special so just set it */
 331                                 curr->subject[i++] = buf[u++];
 332                         }
 333                 }
 334         }
 335
 336         fclose(fp);
 337
 338         output[0] = '\0';
 339
 340         i = print_mails;
 341         while (i) {
 342                 struct ring_list *tmp;
 343                 if (curr->from[0] != '\0') {
 344                         if (i != print_mails) {
 345                                 snprintf(buf, text_buffer_size, "\nF: %-*s S: %-*s", from_width,
 346                                         curr->from, subject_width, curr->subject);
 347                         } else {        /* first time - no \n in front */
 348                                 snprintf(buf, text_buffer_size, "F: %-*s S: %-*s", from_width,
 349                                         curr->from, subject_width, curr->subject);
 350                         }
 351                 } else {
 352                         snprintf(buf, text_buffer_size, "\n");
 353                 }
 354                 strncat(output, buf, max_len - strlen(output));
 355
 356                 tmp = curr;
 357                 curr = curr->previous;
 358                 free(tmp->from);
 359                 free(tmp->subject);
 360                 free(tmp);
 361
 362                 i--;
 363         }
 364 }