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

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  * vim: ts=4 sw=4 noet ai cindent syntax=c
   3  *
   4  * Conky, a system monitor, based on torsmo
   5  *
   6  * Any original torsmo code is licensed under the BSD license
   7  *
   8  * All code written since the fork of torsmo is licensed under the GPL
   9  *
  10  * Please see COPYING for details
  11  *
  12  * Copyright (c) 2006 Marco Candrian <mac@calmar.ws>
  13  * Copyright (c) 2005-2010 Brenden Matthews, Philip Kovacs, et. al.
  14  *      (see AUTHORS)
  15  * All rights reserved.
  16  *
  17  * This program is free software: you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation, either version 3 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  28  *
  29  */
  30
  31 #include "conky.h"
  32 #include "logging.h"
  33 #include "mail.h"
  34 #include "text_object.h"
  35 #include <sys/stat.h>
  36 #include <sys/time.h>
  37 #include <errno.h>
  38
  39 #define FROM_WIDTH 10
  40 #define SUBJECT_WIDTH 22
  41 #define PRINT_MAILS 5
  42 #define TIME_DELAY 5
  43
  44 struct ring_list {
  45         char *from;
  46         char *subject;
  47         struct ring_list *previous;
  48         struct ring_list *next;
  49 };
  50
  51 static time_t last_ctime;       /* needed for mutt at least */
  52 static time_t last_mtime;       /* not sure what to test: testing both now */
  53 static double last_update;
  54
  55 static int args_ok = 0;
  56 static int from_width;
  57 static int subject_width;
  58 static int print_num_mails;
  59 static int time_delay;
  60
  61 static char mbox_mail_spool[DEFAULT_TEXT_BUFFER_SIZE];
  62
  63 static void mbox_scan(char *args, char *output, size_t max_len)
  64 {
  65         int i, u, flag;
  66         int force_rescan = 0;
  67         char buf[text_buffer_size];
  68         struct stat statbuf;
  69         struct ring_list *curr = 0, *prev = 0, *startlist = 0;
  70         FILE *fp;
  71
  72         /* output was set to 1 after malloc'ing in conky.c */
  73         /* -> beeing able to test it here for catching SIGUSR1 */
  74         if (output[0] == 1) {
  75                 force_rescan = 1;
  76                 output[0] = '\0';
  77         }
  78
  79         if (!args_ok || force_rescan) {
  80
  81                 char *substr = strstr(args, "-n");
  82
  83                 if (substr) {
  84                         if (sscanf(substr, "-n %i", &print_num_mails) != 1) {
  85                                 print_num_mails = PRINT_MAILS;
  86                         }
  87                 } else {
  88                         print_num_mails = PRINT_MAILS;
  89                 }
  90                 if (print_num_mails < 1) {
  91                         print_num_mails = 1;
  92                 }
  93
  94                 substr = strstr(args, "-t");
  95                 if (substr) {
  96                         if (sscanf(substr, "-t %i", &time_delay) != 1) {
  97                                 time_delay = TIME_DELAY;
  98                         }
  99                 } else {
 100                         time_delay = TIME_DELAY;
 101                 }
 102
 103                 substr = strstr(args, "-fw");
 104                 if (substr) {
 105                         if (sscanf(substr, "-fw %i", &from_width) != 1) {
 106                                 from_width = FROM_WIDTH;
 107                         }
 108                 } else {
 109                         from_width = FROM_WIDTH;
 110                 }
 111
 112                 substr = strstr(args, "-sw");
 113                 if (substr) {
 114                         if (sscanf(substr, "-sw %i", &subject_width) != 1) {
 115                                 subject_width = SUBJECT_WIDTH;
 116                         }
 117                 } else {
 118                         subject_width = SUBJECT_WIDTH;
 119                 }
 120                 /* encapsulated with "'s find first occurrence of " */
 121                 if (args[strlen(args) - 1] == '"') {
 122                         char *start;
 123                         strncpy(mbox_mail_spool, args, DEFAULT_TEXT_BUFFER_SIZE);
 124                         start = strchr(mbox_mail_spool, '"') + 1;
 125
 126                         start[(long) (strrchr(mbox_mail_spool, '"') - start)] = '\0';
 127                         strncpy(mbox_mail_spool, start, DEFAULT_TEXT_BUFFER_SIZE);
 128                 } else {
 129                         char *copy_args = strndup(args, text_buffer_size);
 130                         char *tmp = strtok(copy_args, " ");
 131                         char *start = tmp;
 132
 133                         while (tmp) {
 134                                 tmp = strtok(NULL, " ");
 135                                 if (tmp) {
 136                                         start = tmp;
 137                                 }
 138                         }
 139                         strncpy(mbox_mail_spool, start, DEFAULT_TEXT_BUFFER_SIZE);
 140                         free(copy_args);
 141                 }
 142                 if (strlen(mbox_mail_spool) < 1) {
 143                         CRIT_ERR(NULL, NULL, "Usage: ${mboxscan [-n <number of messages to print>] "
 144                                 "[-fw <from width>] [-sw <subject width>] "
 145                                 "[-t <delay in sec> mbox]}");
 146                 }
 147
 148                 /* allowing $MAIL in the config */
 149                 if (!strcmp(mbox_mail_spool, "$MAIL")) {
 150                         strcpy(mbox_mail_spool, current_mail_spool);
 151                 }
 152
 153                 if (stat(mbox_mail_spool, &statbuf)) {
 154                         CRIT_ERR(NULL, NULL, "can't stat %s: %s", mbox_mail_spool, strerror(errno));
 155                 }
 156                 args_ok = 1;    /* args-computing necessary only once */
 157         }
 158
 159         /* if time_delay not yet reached, then return */
 160         if (current_update_time - last_update < time_delay && !force_rescan) {
 161                 return;
 162         }
 163
 164         last_update = current_update_time;
 165
 166         /* mbox still exists? and get stat-infos */
 167         if (stat(mbox_mail_spool, &statbuf)) {
 168                 NORM_ERR("can't stat %s: %s", mbox_mail_spool, strerror(errno));
 169                 output[0] = '\0';       /* delete any output */
 170                 return;
 171         }
 172
 173         /* modification time has not changed, so skip scanning the box */
 174         if (statbuf.st_ctime == last_ctime && statbuf.st_mtime == last_mtime
 175                         && !force_rescan) {
 176                 return;
 177         }
 178
 179         last_ctime = statbuf.st_ctime;
 180         last_mtime = statbuf.st_mtime;
 181
 182         /* build up double-linked ring-list to hold data, while scanning down the
 183          * mbox */
 184         for (i = 0; i < print_num_mails; i++) {
 185                 curr = (struct ring_list *) malloc(sizeof(struct ring_list));
 186                 curr->from = (char *) malloc(sizeof(char[from_width + 1]));
 187                 curr->subject = (char *) malloc(sizeof(char[subject_width + 1]));
 188                 curr->from[0] = '\0';
 189                 curr->subject[0] = '\0';
 190
 191                 if (i == 0) {
 192                         startlist = curr;
 193                 }
 194                 if (i > 0) {
 195                         curr->previous = prev;
 196                         prev->next = curr;
 197                 }
 198                 prev = curr;
 199         }
 200
 201         /* connect end to start for an endless loop-ring */
 202         startlist->previous = curr;
 203         curr->next = startlist;
 204
 205         /* mbox */
 206         fp = fopen(mbox_mail_spool, "r");
 207         if (!fp) {
 208                 return;
 209         }
 210
 211         /* first find a "From " to set it to 0 for header-sarchings */
 212         flag = 1;
 213         while (!feof(fp)) {
 214                 if (fgets(buf, text_buffer_size, fp) == NULL) {
 215                         break;
 216                 }
 217
 218                 if (strncmp(buf, "From ", 5) == 0) {
 219                         curr = curr->next;
 220
 221                         /* skip until \n */
 222                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 223                                 fgets(buf, text_buffer_size, fp);
 224                         }
 225
 226                         flag = 0;       /* in the headers now */
 227                         continue;
 228                 }
 229
 230                 if (flag == 1) {        /* in the body, so skip */
 231                         continue;
 232                 }
 233
 234                 if (buf[0] == '\n') {
 235                         /* beyond the headers now (empty line), skip until \n */
 236                         /* then search for new mail ("From ") */
 237
 238                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 239                                 fgets(buf, text_buffer_size, fp);
 240                         }
 241                         flag = 1;       /* in the body now */
 242                         continue;
 243                 }
 244
 245                 if ((strncmp(buf, "X-Status: ", 10) == 0)
 246                                 || (strncmp(buf, "Status: R", 9) == 0)) {
 247
 248                         /* Mail was read or something, so skip that message */
 249                         flag = 1;       /* search for next From */
 250                         curr->subject[0] = '\0';
 251                         curr->from[0] = '\0';
 252                         /* (will get current again on new 'From ' finding) */
 253                         curr = curr->previous;
 254                         /* Skip until \n */
 255                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 256                                 fgets(buf, text_buffer_size, fp);
 257                         }
 258                         continue;
 259                 }
 260
 261                 /* that covers ^From: and ^from: ^From:<tab> */
 262                 if (strncmp(buf + 1, "rom:", 4) == 0) {
 263
 264                         i = 0;
 265                         u = 6;  /* no "From: " string needed, so skip */
 266                         while (1) {
 267
 268                                 if (buf[u] == '"') {    /* no quotes around names */
 269                                         u++;
 270                                         continue;
 271                                 }
 272
 273                                 /* some are: From: <foo@bar.com> */
 274                                 if (buf[u] == '<' && i > 1) {
 275
 276                                         curr->from[i] = '\0';
 277                                         /* skip until \n */
 278                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 279                                                 fgets(buf, text_buffer_size, fp);
 280                                         }
 281                                         break;
 282                                 }
 283
 284                                 if (buf[u] == '\n') {
 285                                         curr->from[i] = '\0';
 286                                         break;
 287                                 }
 288
 289                                 if (buf[u] == '\0') {
 290                                         curr->from[i] = '\0';
 291                                         break;
 292                                 }
 293
 294                                 if (i >= from_width) {
 295                                         curr->from[i] = '\0';
 296                                         /* skip until \n */
 297                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 298                                                 fgets(buf, text_buffer_size, fp);
 299                                         }
 300                                         break;
 301                                 }
 302
 303                                 /* nothing special so just set it */
 304                                 curr->from[i++] = buf[u++];
 305                         }
 306                 }
 307
 308                 /* that covers ^Subject: and ^subject: and ^Subjec:<tab> */
 309                 if (strncmp(buf + 1, "ubject:", 7) == 0) {
 310
 311                         i = 0;
 312                         u = 9;  /* no "Subject: " string needed, so skip */
 313                         while (1) {
 314
 315                                 if (buf[u] == '\n') {
 316                                         curr->subject[i] = '\0';
 317                                         break;
 318                                 }
 319                                 if (buf[u] == '\0') {
 320                                         curr->subject[i] = '\0';
 321                                         break;
 322                                 }
 323                                 if (i >= subject_width) {
 324                                         curr->subject[i] = '\0';
 325
 326                                         /* skip until \n */
 327                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 328                                                 fgets(buf, text_buffer_size, fp);
 329                                         }
 330                                         break;
 331                                 }
 332
 333                                 /* nothing special so just set it */
 334                                 curr->subject[i++] = buf[u++];
 335                         }
 336                 }
 337         }
 338
 339         fclose(fp);
 340
 341         output[0] = '\0';
 342
 343         i = print_num_mails;
 344         while (i) {
 345                 struct ring_list *tmp;
 346                 if (curr->from[0] != '\0') {
 347                         if (i != print_num_mails) {
 348                                 snprintf(buf, text_buffer_size, "\nF: %-*s S: %-*s", from_width,
 349                                         curr->from, subject_width, curr->subject);
 350                         } else {        /* first time - no \n in front */
 351                                 snprintf(buf, text_buffer_size, "F: %-*s S: %-*s", from_width,
 352                                         curr->from, subject_width, curr->subject);
 353                         }
 354                 } else {
 355                         snprintf(buf, text_buffer_size, "\n");
 356                 }
 357                 strncat(output, buf, max_len - strlen(output));
 358
 359                 tmp = curr;
 360                 curr = curr->previous;
 361                 free(tmp->from);
 362                 free(tmp->subject);
 363                 free(tmp);
 364
 365                 i--;
 366         }
 367 }
 368
 369 struct mboxscan_data {
 370         char *args;
 371         char *output;
 372 };
 373
 374 void parse_mboxscan_arg(struct text_object *obj, const char *arg)
 375 {
 376         struct mboxscan_data *msd;
 377
 378         msd = malloc(sizeof(struct mboxscan_data));
 379         memset(msd, 0, sizeof(struct mboxscan_data));
 380
 381         msd->args = strndup(arg, text_buffer_size);
 382         msd->output = (char *) malloc(text_buffer_size);
 383         /* if '1' (in mboxscan.c) then there was SIGUSR1, hmm */
 384         msd->output[0] = 1;
 385
 386         obj->data.opaque = msd;
 387 }
 388
 389 void print_mboxscan(struct text_object *obj, char *p, int p_max_size)
 390 {
 391         struct mboxscan_data *msd = obj->data.opaque;
 392
 393         if (!msd)
 394                 return;
 395
 396         mbox_scan(msd->args, msd->output, text_buffer_size);
 397         snprintf(p, p_max_size, "%s", msd->output);
 398 }
 399
 400 void free_mboxscan(struct text_object *obj)
 401 {
 402         struct mboxscan_data *msd = obj->data.opaque;
 403
 404         if (!msd)
 405                 return;
 406         if (msd->args)
 407                 free(msd->args);
 408         if (msd->output)
 409                 free(msd->output);
 410         free(obj->data.opaque);
 411         obj->data.opaque = NULL;
 412 }
 413