git.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) 2005-2007 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  * $Id$ */
  27
  28 #include "conky.h"
  29 #include <sys/stat.h>
  30 #include <sys/time.h>
  31 #include <errno.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include "mboxscan.h"
  36
  37 #define FROM_WIDTH 10
  38 #define SUBJECT_WIDTH 22
  39 #define PRINT_MAILS 5
  40 #define TIME_DELAY 5
  41
  42 struct ring_list {
  43         char *from;
  44         char *subject;
  45         struct ring_list *previous;
  46         struct ring_list *next;
  47 };
  48
  49 static time_t last_ctime;       /* needed for mutt at least */
  50 static time_t last_mtime;       /* not sure what to test: testing both now */
  51 static double last_update;
  52
  53 static int args_ok = 0;
  54 static int from_width;
  55 static int subject_width;
  56 static int print_mails;
  57 static int time_delay;
  58
  59 static char mbox_mail_spool[DEFAULT_TEXT_BUFFER_SIZE];
  60
  61 void mbox_scan(char *args, char *output, size_t max_len)
  62 {
  63         int i, u, flag;
  64         int force_rescan = 0;
  65         char buf[text_buffer_size];
  66         struct stat statbuf;
  67
  68         /* output was set to 1 after malloc'ing in conky.c */
  69         /* -> beeing able to test it here for catching SIGUSR1 */
  70         if (output[0] == 1) {
  71                 force_rescan = 1;
  72                 output[0] = '\0';
  73         }
  74
  75         if (!args_ok || force_rescan) {
  76
  77                 char *substr = strstr(args, "-n");
  78
  79                 if (substr) {
  80                         if (sscanf(substr, "-n %i", &print_mails) != 1) {
  81                                 print_mails = PRINT_MAILS;
  82                         }
  83                 } else {
  84                         print_mails = PRINT_MAILS;
  85                 }
  86                 if (print_mails < 1) {
  87                         print_mails = 1;
  88                 }
  89
  90                 substr = strstr(args, "-t");
  91                 if (substr) {
  92                         if (sscanf(substr, "-t %i", &time_delay) != 1) {
  93                                 time_delay = TIME_DELAY;
  94                         }
  95                 } else {
  96                         time_delay = TIME_DELAY;
  97                 }
  98
  99                 substr = strstr(args, "-fw");
 100                 if (substr) {
 101                         if (sscanf(substr, "-fw %i", &from_width) != 1) {
 102                                 from_width = FROM_WIDTH;
 103                         }
 104                 } else {
 105                         from_width = FROM_WIDTH;
 106                 }
 107
 108                 substr = strstr(args, "-sw");
 109                 if (substr) {
 110                         if (sscanf(substr, "-sw %i", &subject_width) != 1) {
 111                                 subject_width = SUBJECT_WIDTH;
 112                         }
 113                 } else {
 114                         subject_width = SUBJECT_WIDTH;
 115                 }
 116                 /* encapsulated with "'s find first occurrence of " */
 117                 if (args[strlen(args) - 1] == '"') {
 118                         strncpy(mbox_mail_spool, args, DEFAULT_TEXT_BUFFER_SIZE);
 119                         char *start = strchr(mbox_mail_spool, '"') + 1;
 120
 121                         start[(long) (strrchr(mbox_mail_spool, '"') - start)] = '\0';
 122                         strncpy(mbox_mail_spool, start, DEFAULT_TEXT_BUFFER_SIZE);
 123                 } else {
 124                         char *copy_args = strdup(args);
 125                         char *tmp = strtok(copy_args, " ");
 126                         char *start = tmp;
 127
 128                         while (tmp) {
 129                                 tmp = strtok(NULL, " ");
 130                                 if (tmp) {
 131                                         start = tmp;
 132                                 }
 133                         }
 134                         strncpy(mbox_mail_spool, start, DEFAULT_TEXT_BUFFER_SIZE);
 135                         free(copy_args);
 136                 }
 137                 if (strlen(mbox_mail_spool) < 1) {
 138                         CRIT_ERR("Usage: ${mboxscan [-n <number of messages to print>] "
 139                                 "[-fw <from width>] [-sw <subject width>] "
 140                                 "[-t <delay in sec> mbox]}");
 141                 }
 142
 143                 /* allowing $MAIL in the config */
 144                 if (!strcmp(mbox_mail_spool, "$MAIL")) {
 145                         strcpy(mbox_mail_spool, current_mail_spool);
 146                 }
 147
 148                 if (stat(mbox_mail_spool, &statbuf)) {
 149                         CRIT_ERR("can't stat %s: %s", mbox_mail_spool, strerror(errno));
 150                 }
 151                 args_ok = 1;    /* args-computing necessary only once */
 152         }
 153
 154         /* if time_delay not yet reached, then return */
 155         if (current_update_time - last_update < time_delay && !force_rescan) {
 156                 return;
 157         }
 158
 159         last_update = current_update_time;
 160
 161         /* mbox still exists? and get stat-infos */
 162         if (stat(mbox_mail_spool, &statbuf)) {
 163                 ERR("can't stat %s: %s", mbox_mail_spool, strerror(errno));
 164                 output[0] = '\0';       /* delete any output */
 165                 return;
 166         }
 167
 168         /* modification time has not changed, so skip scanning the box */
 169         if (statbuf.st_ctime == last_ctime && statbuf.st_mtime == last_mtime
 170                         && !force_rescan) {
 171                 return;
 172         }
 173
 174         last_ctime = statbuf.st_ctime;
 175         last_mtime = statbuf.st_mtime;
 176
 177         /* build up double-linked ring-list to hold data, while scanning down the
 178          * mbox */
 179         struct ring_list *curr = 0, *prev = 0, *startlist = 0;
 180
 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         FILE *fp;
 204
 205         fp = fopen(mbox_mail_spool, "r");
 206         if (!fp) {
 207                 return;
 208         }
 209
 210         /* first find a "From " to set it to 0 for header-sarchings */
 211         flag = 1;
 212         while (!feof(fp)) {
 213                 if (fgets(buf, text_buffer_size, fp) == NULL) {
 214                         break;
 215                 }
 216
 217                 if (strncmp(buf, "From ", 5) == 0) {
 218                         curr = curr->next;
 219
 220                         /* skip until \n */
 221                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 222                                 fgets(buf, text_buffer_size, fp);
 223                         }
 224
 225                         flag = 0;       /* in the headers now */
 226                         continue;
 227                 }
 228
 229                 if (flag == 1) {        /* in the body, so skip */
 230                         continue;
 231                 }
 232
 233                 if (buf[0] == '\n') {
 234                         /* beyond the headers now (empty line), skip until \n */
 235                         /* then search for new mail ("From ") */
 236
 237                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 238                                 fgets(buf, text_buffer_size, fp);
 239                         }
 240                         flag = 1;       /* in the body now */
 241                         continue;
 242                 }
 243
 244                 if ((strncmp(buf, "X-Status: ", 10) == 0)
 245                                 || (strncmp(buf, "Status: R", 9) == 0)) {
 246
 247                         /* Mail was read or something, so skip that message */
 248                         flag = 1;       /* search for next From */
 249                         curr->subject[0] = '\0';
 250                         curr->from[0] = '\0';
 251                         /* (will get current again on new 'From ' finding) */
 252                         curr = curr->previous;
 253                         /* Skip until \n */
 254                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 255                                 fgets(buf, text_buffer_size, fp);
 256                         }
 257                         continue;
 258                 }
 259
 260                 /* that covers ^From: and ^from: ^From:<tab> */
 261                 if (strncmp(buf + 1, "rom:", 4) == 0) {
 262
 263                         i = 0;
 264                         u = 6;  /* no "From: " string needed, so skip */
 265                         while (1) {
 266
 267                                 if (buf[u] == '"') {    /* no quotes around names */
 268                                         u++;
 269                                         continue;
 270                                 }
 271
 272                                 /* some are: From: <foo@bar.com> */
 273                                 if (buf[u] == '<' && i > 1) {
 274
 275                                         curr->from[i] = '\0';
 276                                         /* skip until \n */
 277                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 278                                                 fgets(buf, text_buffer_size, fp);
 279                                         }
 280                                         break;
 281                                 }
 282
 283                                 if (buf[u] == '\n') {
 284                                         curr->from[i] = '\0';
 285                                         break;
 286                                 }
 287
 288                                 if (buf[u] == '\0') {
 289                                         curr->from[i] = '\0';
 290                                         break;
 291                                 }
 292
 293                                 if (i >= from_width) {
 294                                         curr->from[i] = '\0';
 295                                         /* skip until \n */
 296                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 297                                                 fgets(buf, text_buffer_size, fp);
 298                                         }
 299                                         break;
 300                                 }
 301
 302                                 /* nothing special so just set it */
 303                                 curr->from[i++] = buf[u++];
 304                         }
 305                 }
 306
 307                 /* that covers ^Subject: and ^subject: and ^Subjec:<tab> */
 308                 if (strncmp(buf + 1, "ubject:", 7) == 0) {
 309
 310                         i = 0;
 311                         u = 9;  /* no "Subject: " string needed, so skip */
 312                         while (1) {
 313
 314                                 if (buf[u] == '\n') {
 315                                         curr->subject[i] = '\0';
 316                                         break;
 317                                 }
 318                                 if (buf[u] == '\0') {
 319                                         curr->subject[i] = '\0';
 320                                         break;
 321                                 }
 322                                 if (i >= subject_width) {
 323                                         curr->subject[i] = '\0';
 324
 325                                         /* skip until \n */
 326                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 327                                                 fgets(buf, text_buffer_size, fp);
 328                                         }
 329                                         break;
 330                                 }
 331
 332                                 /* nothing special so just set it */
 333                                 curr->subject[i++] = buf[u++];
 334                         }
 335                 }
 336         }
 337
 338         fclose(fp);
 339
 340         output[0] = '\0';
 341         struct ring_list *tmp;
 342
 343         i = print_mails;
 344         while (i) {
 345                 if (curr->from[0] != '\0') {
 346                         if (i != print_mails) {
 347                                 snprintf(buf, text_buffer_size, "\nF: %-*s S: %-*s", from_width,
 348                                         curr->from, subject_width, curr->subject);
 349                         } else {        /* first time - no \n in front */
 350                                 snprintf(buf, text_buffer_size, "F: %-*s S: %-*s", from_width,
 351                                         curr->from, subject_width, curr->subject);
 352                         }
 353                 } else {
 354                         snprintf(buf, text_buffer_size, "\n");
 355                 }
 356                 strncat(output, buf, max_len - strlen(output));
 357
 358                 tmp = curr;
 359                 curr = curr->previous;
 360                 free(tmp->from);
 361                 free(tmp->subject);
 362                 free(tmp);
 363
 364                 i--;
 365         }
 366 }