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) 2005-2008 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         struct ring_list *curr = 0, *prev = 0, *startlist = 0;
  68         FILE *fp;
  69
  70         /* output was set to 1 after malloc'ing in conky.c */
  71         /* -> beeing able to test it here for catching SIGUSR1 */
  72         if (output[0] == 1) {
  73                 force_rescan = 1;
  74                 output[0] = '\0';
  75         }
  76
  77         if (!args_ok || force_rescan) {
  78
  79                 char *substr = strstr(args, "-n");
  80
  81                 if (substr) {
  82                         if (sscanf(substr, "-n %i", &print_mails) != 1) {
  83                                 print_mails = PRINT_MAILS;
  84                         }
  85                 } else {
  86                         print_mails = PRINT_MAILS;
  87                 }
  88                 if (print_mails < 1) {
  89                         print_mails = 1;
  90                 }
  91
  92                 substr = strstr(args, "-t");
  93                 if (substr) {
  94                         if (sscanf(substr, "-t %i", &time_delay) != 1) {
  95                                 time_delay = TIME_DELAY;
  96                         }
  97                 } else {
  98                         time_delay = TIME_DELAY;
  99                 }
 100
 101                 substr = strstr(args, "-fw");
 102                 if (substr) {
 103                         if (sscanf(substr, "-fw %i", &from_width) != 1) {
 104                                 from_width = FROM_WIDTH;
 105                         }
 106                 } else {
 107                         from_width = FROM_WIDTH;
 108                 }
 109
 110                 substr = strstr(args, "-sw");
 111                 if (substr) {
 112                         if (sscanf(substr, "-sw %i", &subject_width) != 1) {
 113                                 subject_width = SUBJECT_WIDTH;
 114                         }
 115                 } else {
 116                         subject_width = SUBJECT_WIDTH;
 117                 }
 118                 /* encapsulated with "'s find first occurrence of " */
 119                 if (args[strlen(args) - 1] == '"') {
 120                         char *start;
 121                         strncpy(mbox_mail_spool, args, DEFAULT_TEXT_BUFFER_SIZE);
 122                         start = strchr(mbox_mail_spool, '"') + 1;
 123
 124                         start[(long) (strrchr(mbox_mail_spool, '"') - start)] = '\0';
 125                         strncpy(mbox_mail_spool, start, DEFAULT_TEXT_BUFFER_SIZE);
 126                 } else {
 127                         char *copy_args = strndup(args, text_buffer_size);
 128                         char *tmp = strtok(copy_args, " ");
 129                         char *start = tmp;
 130
 131                         while (tmp) {
 132                                 tmp = strtok(NULL, " ");
 133                                 if (tmp) {
 134                                         start = tmp;
 135                                 }
 136                         }
 137                         strncpy(mbox_mail_spool, start, DEFAULT_TEXT_BUFFER_SIZE);
 138                         free(copy_args);
 139                 }
 140                 if (strlen(mbox_mail_spool) < 1) {
 141                         CRIT_ERR("Usage: ${mboxscan [-n <number of messages to print>] "
 142                                 "[-fw <from width>] [-sw <subject width>] "
 143                                 "[-t <delay in sec> mbox]}");
 144                 }
 145
 146                 /* allowing $MAIL in the config */
 147                 if (!strcmp(mbox_mail_spool, "$MAIL")) {
 148                         strcpy(mbox_mail_spool, current_mail_spool);
 149                 }
 150
 151                 if (stat(mbox_mail_spool, &statbuf)) {
 152                         CRIT_ERR("can't stat %s: %s", mbox_mail_spool, strerror(errno));
 153                 }
 154                 args_ok = 1;    /* args-computing necessary only once */
 155         }
 156
 157         /* if time_delay not yet reached, then return */
 158         if (current_update_time - last_update < time_delay && !force_rescan) {
 159                 return;
 160         }
 161
 162         last_update = current_update_time;
 163
 164         /* mbox still exists? and get stat-infos */
 165         if (stat(mbox_mail_spool, &statbuf)) {
 166                 ERR("can't stat %s: %s", mbox_mail_spool, strerror(errno));
 167                 output[0] = '\0';       /* delete any output */
 168                 return;
 169         }
 170
 171         /* modification time has not changed, so skip scanning the box */
 172         if (statbuf.st_ctime == last_ctime && statbuf.st_mtime == last_mtime
 173                         && !force_rescan) {
 174                 return;
 175         }
 176
 177         last_ctime = statbuf.st_ctime;
 178         last_mtime = statbuf.st_mtime;
 179
 180         /* build up double-linked ring-list to hold data, while scanning down the
 181          * mbox */
 182         for (i = 0; i < print_mails; i++) {
 183                 curr = (struct ring_list *) malloc(sizeof(struct ring_list));
 184                 curr->from = (char *) malloc(sizeof(char[from_width + 1]));
 185                 curr->subject = (char *) malloc(sizeof(char[subject_width + 1]));
 186                 curr->from[0] = '\0';
 187                 curr->subject[0] = '\0';
 188
 189                 if (i == 0) {
 190                         startlist = curr;
 191                 }
 192                 if (i > 0) {
 193                         curr->previous = prev;
 194                         prev->next = curr;
 195                 }
 196                 prev = curr;
 197         }
 198
 199         /* connect end to start for an endless loop-ring */
 200         startlist->previous = curr;
 201         curr->next = startlist;
 202
 203         /* mbox */
 204         fp = fopen(mbox_mail_spool, "r");
 205         if (!fp) {
 206                 return;
 207         }
 208
 209         /* first find a "From " to set it to 0 for header-sarchings */
 210         flag = 1;
 211         while (!feof(fp)) {
 212                 if (fgets(buf, text_buffer_size, fp) == NULL) {
 213                         break;
 214                 }
 215
 216                 if (strncmp(buf, "From ", 5) == 0) {
 217                         curr = curr->next;
 218
 219                         /* skip until \n */
 220                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 221                                 fgets(buf, text_buffer_size, fp);
 222                         }
 223
 224                         flag = 0;       /* in the headers now */
 225                         continue;
 226                 }
 227
 228                 if (flag == 1) {        /* in the body, so skip */
 229                         continue;
 230                 }
 231
 232                 if (buf[0] == '\n') {
 233                         /* beyond the headers now (empty line), skip until \n */
 234                         /* then search for new mail ("From ") */
 235
 236                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 237                                 fgets(buf, text_buffer_size, fp);
 238                         }
 239                         flag = 1;       /* in the body now */
 240                         continue;
 241                 }
 242
 243                 if ((strncmp(buf, "X-Status: ", 10) == 0)
 244                                 || (strncmp(buf, "Status: R", 9) == 0)) {
 245
 246                         /* Mail was read or something, so skip that message */
 247                         flag = 1;       /* search for next From */
 248                         curr->subject[0] = '\0';
 249                         curr->from[0] = '\0';
 250                         /* (will get current again on new 'From ' finding) */
 251                         curr = curr->previous;
 252                         /* Skip until \n */
 253                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 254                                 fgets(buf, text_buffer_size, fp);
 255                         }
 256                         continue;
 257                 }
 258
 259                 /* that covers ^From: and ^from: ^From:<tab> */
 260                 if (strncmp(buf + 1, "rom:", 4) == 0) {
 261
 262                         i = 0;
 263                         u = 6;  /* no "From: " string needed, so skip */
 264                         while (1) {
 265
 266                                 if (buf[u] == '"') {    /* no quotes around names */
 267                                         u++;
 268                                         continue;
 269                                 }
 270
 271                                 /* some are: From: <foo@bar.com> */
 272                                 if (buf[u] == '<' && i > 1) {
 273
 274                                         curr->from[i] = '\0';
 275                                         /* skip until \n */
 276                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 277                                                 fgets(buf, text_buffer_size, fp);
 278                                         }
 279                                         break;
 280                                 }
 281
 282                                 if (buf[u] == '\n') {
 283                                         curr->from[i] = '\0';
 284                                         break;
 285                                 }
 286
 287                                 if (buf[u] == '\0') {
 288                                         curr->from[i] = '\0';
 289                                         break;
 290                                 }
 291
 292                                 if (i >= from_width) {
 293                                         curr->from[i] = '\0';
 294                                         /* skip until \n */
 295                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 296                                                 fgets(buf, text_buffer_size, fp);
 297                                         }
 298                                         break;
 299                                 }
 300
 301                                 /* nothing special so just set it */
 302                                 curr->from[i++] = buf[u++];
 303                         }
 304                 }
 305
 306                 /* that covers ^Subject: and ^subject: and ^Subjec:<tab> */
 307                 if (strncmp(buf + 1, "ubject:", 7) == 0) {
 308
 309                         i = 0;
 310                         u = 9;  /* no "Subject: " string needed, so skip */
 311                         while (1) {
 312
 313                                 if (buf[u] == '\n') {
 314                                         curr->subject[i] = '\0';
 315                                         break;
 316                                 }
 317                                 if (buf[u] == '\0') {
 318                                         curr->subject[i] = '\0';
 319                                         break;
 320                                 }
 321                                 if (i >= subject_width) {
 322                                         curr->subject[i] = '\0';
 323
 324                                         /* skip until \n */
 325                                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 326                                                 fgets(buf, text_buffer_size, fp);
 327                                         }
 328                                         break;
 329                                 }
 330
 331                                 /* nothing special so just set it */
 332                                 curr->subject[i++] = buf[u++];
 333                         }
 334                 }
 335         }
 336
 337         fclose(fp);
 338
 339         output[0] = '\0';
 340
 341         i = print_mails;
 342         while (i) {
 343                 struct ring_list *tmp;
 344                 if (curr->from[0] != '\0') {
 345                         if (i != print_mails) {
 346                                 snprintf(buf, text_buffer_size, "\nF: %-*s S: %-*s", from_width,
 347                                         curr->from, subject_width, curr->subject);
 348                         } else {        /* first time - no \n in front */
 349                                 snprintf(buf, text_buffer_size, "F: %-*s S: %-*s", from_width,
 350                                         curr->from, subject_width, curr->subject);
 351                         }
 352                 } else {
 353                         snprintf(buf, text_buffer_size, "\n");
 354                 }
 355                 strncat(output, buf, max_len - strlen(output));
 356
 357                 tmp = curr;
 358                 curr = curr->previous;
 359                 free(tmp->from);
 360                 free(tmp->subject);
 361                 free(tmp);
 362
 363                 i--;
 364         }
 365 }