alpine/init.c

   1 #if !defined(lint) && !defined(DOS)
   2 static char rcsid[] = "$Id: init.c 101 2006-08-10 22:53:04Z mikes@u.washington.edu $";
   3 #endif
   4
   5 /*
   6  * ========================================================================
   7  * Copyright 2006-2007 University of Washington
   8  * Copyright 2013-2020 Eduardo Chappa
   9  *
  10  * Licensed under the Apache License, Version 2.0 (the "License");
  11  * you may not use this file except in compliance with the License.
  12  * You may obtain a copy of the License at
  13  *
  14  *     http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * ========================================================================
  17  */
  18
  19 /*======================================================================
  20      init.c
  21
  22   Session initiation support routines
  23
  24  ====*/
  25
  26
  27 #include "headers.h"
  28
  29 #include "../pith/init.h"
  30 #include "../pith/conf.h"
  31 #include "../pith/status.h"
  32 #include "../pith/folder.h"
  33 #include "../pith/context.h"
  34
  35 #include "init.h"
  36
  37
  38 /* these are used to report folder directory creation problems */
  39 CONF_TXT_T init_md_exists[] =   "The \"%s\" subdirectory already exists, but it is not writable by Alpine so Alpine cannot run.  Please correct the permissions and restart Alpine.";
  40
  41 CONF_TXT_T init_md_file[] =     "Alpine requires a directory called \"%s\" and usually creates it.  You already have a regular file by that name which means Alpine cannot create the directory.  Please move or remove it and start Alpine again.";
  42
  43 CONF_TXT_T init_md_create[] =   "Creating subdirectory \"%s\" where Alpine will store its mail folders.";
  44
  45
  46 /*
  47  * Internal prototypes
  48  */
  49 char    *context_string(char *);
  50 int      prune_folders(CONTEXT_S *, char *, int, char *, unsigned);
  51 int      prune_move_folder(char *, char *, CONTEXT_S *);
  52 void     delete_old_mail(struct sm_folder *, CONTEXT_S *, char *);
  53
  54
  55
  56 /*----------------------------------------------------------------------
  57     Make sure the alpine folders directory exists, with proper folders
  58
  59    Args: ps -- alpine structure to get mail directory and contexts from
  60
  61   Result: returns 0 if it exists or it is created and all is well
  62                   1 if it is missing and can't be created.
  63   ----*/
  64 int
  65 init_mail_dir(struct pine *ps)
  66 {
  67
  68 /* MAIL_LIST: can we use imap4 CREATE? */
  69     /*
  70      * We don't really care if mail_dir exists if it isn't
  71      * part of the first folder collection specified.  If this
  72      * is the case, it must have been created external to us, so
  73      * just move one...
  74      */
  75     if(ps->VAR_FOLDER_SPEC && ps->VAR_FOLDER_SPEC[0]){
  76         char *p  = context_string(ps->VAR_FOLDER_SPEC[0]);
  77         int   rv = strncmp(p, ps->VAR_MAIL_DIRECTORY,
  78                            strlen(ps->VAR_MAIL_DIRECTORY));
  79         fs_give((void **)&p);
  80         if(rv)
  81           return(0);
  82     }
  83
  84     switch(is_writable_dir(ps->folders_dir)){
  85       case 0:
  86         /* --- all is well --- */
  87         return(0);
  88
  89       case 1:
  90         snprintf(tmp_20k_buf, SIZEOF_20KBUF, init_md_exists, ps->folders_dir);
  91         display_init_err(tmp_20k_buf, 1);
  92         return(-1);
  93
  94       case 2:
  95         snprintf(tmp_20k_buf, SIZEOF_20KBUF, init_md_file, ps->folders_dir);
  96         display_init_err(tmp_20k_buf, 1);
  97         return(-1);
  98
  99       case 3:
 100         snprintf(tmp_20k_buf, SIZEOF_20KBUF, init_md_create, ps->folders_dir);
 101         display_init_err(tmp_20k_buf, 0);
 102 #ifndef _WINDOWS
 103         sleep(4);
 104 #endif
 105         if(create_mail_dir(ps->folders_dir) < 0){
 106             snprintf(tmp_20k_buf, SIZEOF_20KBUF, "Error creating subdirectory \"%s\" : %s",
 107                     ps->folders_dir, error_description(errno));
 108             display_init_err(tmp_20k_buf, 1);
 109             return(-1);
 110         }
 111     }
 112
 113     return(0);
 114 }
 115
 116
 117 /*----------------------------------------------------------------------
 118   Make sure the default save folders exist in the default
 119   save context.
 120   ----*/
 121 void
 122 display_init_err(char *s, int err)
 123 {
 124 #ifdef  _WINDOWS
 125     mswin_messagebox(s, err);
 126 #else
 127     int n = 0;
 128
 129     if(err)
 130       fputc(BELL, stdout);
 131
 132     for(; *s; s++)
 133       if(++n > 60 && isspace((unsigned char)*s)){
 134           n = 0;
 135           fputc('\n', stdout);
 136           while(*(s+1) && isspace((unsigned char)*(s+1)))
 137             s++;
 138       }
 139       else
 140         fputc(*s, stdout);
 141
 142     fputc('\n', stdout);
 143 #endif
 144 }
 145
 146
 147 /*
 148  * Return malloc'd string containing only the context specifier given
 149  * a string containing the raw pinerc entry
 150  */
 151 char *
 152 context_string(char *s)
 153 {
 154     CONTEXT_S *t = new_context(s, NULL);
 155     char      *rv = NULL;
 156
 157     if(t){
 158         /*
 159          * Take what we want from context, then free the rest...
 160          */
 161         rv = t->context;
 162         t->context = NULL;                      /* don't free it! */
 163         free_context(&t);
 164     }
 165
 166     return(rv ? rv : cpystr(""));
 167 }
 168
 169
 170
 171 /*----------------------------------------------------------------------
 172       Rename the current sent-mail folder to sent-mail for last month
 173
 174    open up sent-mail and get date of very first message
 175    if date is last month rename and...
 176        if files from 3 months ago exist ask if they should be deleted and...
 177            if files from previous months and yes ask about them, too.
 178   ----------------------------------------------------------------------*/
 179 int
 180 expire_sent_mail(void)
 181 {
 182     int          cur_month, ok = 1;
 183     time_t       now;
 184     char         tmp[50], **p;
 185     struct tm   *tm_now;
 186     CONTEXT_S   *prune_cntxt;
 187
 188     dprint((5, "==== expire_mail called ====\n"));
 189
 190     if(!check_prune_time(&now, &tm_now))
 191       return 0;
 192
 193     cur_month = (1900 + tm_now->tm_year) * 12 + tm_now->tm_mon;
 194     dprint((5, "Current month %d\n", cur_month));
 195
 196     /*
 197      * locate the default save context...
 198      */
 199     if(!(prune_cntxt = default_save_context(ps_global->context_list)))
 200       prune_cntxt = ps_global->context_list;
 201
 202     /*
 203      * Since fcc's and read-mail can be an IMAP mailbox, be sure to only
 204      * try expiring a list if it's an ambiguous name associated with some
 205      * collection...
 206      *
 207      * If sentmail set outside a context, then pruning is up to the
 208      * user...
 209      */
 210     if(prune_cntxt){
 211         if(ps_global->VAR_DEFAULT_FCC && *ps_global->VAR_DEFAULT_FCC
 212            && context_isambig(ps_global->VAR_DEFAULT_FCC))
 213           ok = prune_folders(prune_cntxt, ps_global->VAR_DEFAULT_FCC,
 214                              cur_month, " SENT",
 215                              ps_global->pruning_rule);
 216
 217         if(ok && ps_global->VAR_READ_MESSAGE_FOLDER
 218            && *ps_global->VAR_READ_MESSAGE_FOLDER
 219            && context_isambig(ps_global->VAR_READ_MESSAGE_FOLDER))
 220           ok = prune_folders(prune_cntxt, ps_global->VAR_READ_MESSAGE_FOLDER,
 221                              cur_month, " READ",
 222                              ps_global->pruning_rule);
 223     }
 224
 225     /*
 226      * Within the default prune context,
 227      * prune back the folders with the given name
 228      */
 229     if(ok && prune_cntxt && (p = ps_global->VAR_PRUNED_FOLDERS))
 230       for(; ok && *p; p++)
 231         if(**p && context_isambig(*p))
 232           ok = prune_folders(prune_cntxt, *p, cur_month, "",
 233                              ps_global->pruning_rule);
 234
 235     /*
 236      * Mark that we're done for this month...
 237      */
 238     if(ok){
 239         ps_global->last_expire_year = tm_now->tm_year;
 240         ps_global->last_expire_month = tm_now->tm_mon;
 241         snprintf(tmp, sizeof(tmp), "%d.%d", ps_global->last_expire_year,
 242                 ps_global->last_expire_month + 1);
 243         set_variable(V_LAST_TIME_PRUNE_QUESTION, tmp, 1, 1, Main);
 244     }
 245
 246     return(1);
 247 }
 248
 249
 250 /*----------------------------------------------------------------------
 251      Offer to delete old sent-mail folders
 252
 253   Args: sml -- The list of sent-mail folders
 254
 255   ----*/
 256 int
 257 prune_folders(CONTEXT_S *prune_cntxt, char *folder_base, int cur_month,
 258               char *type, unsigned int pr)
 259 {
 260     char         path2[MAXPATH+1],  prompt[128], tmp[21];
 261     int          month_to_use, exists;
 262     struct sm_folder *mail_list, *sm;
 263
 264     mail_list = get_mail_list(prune_cntxt, folder_base);
 265     free_folder_list(prune_cntxt);
 266
 267 #ifdef  DEBUG
 268     for(sm = mail_list; sm != NULL && sm->name != NULL; sm++)
 269       dprint((5,"Old sent-mail: %5d  %s\n", sm->month_num,
 270              sm->name[0] ? sm->name : "?"));
 271 #endif
 272
 273     for(sm = mail_list; sm != NULL && sm->name != NULL; sm++)
 274       if(sm->month_num == cur_month - 1)
 275         break;  /* matched a month */
 276
 277     month_to_use = (sm == NULL || sm->name == NULL) ? cur_month - 1 : 0;
 278
 279     dprint((5, "Month_to_use : %d\n", month_to_use));
 280
 281     if(month_to_use == 0 || pr == PRUNE_NO_AND_ASK || pr == PRUNE_NO_AND_NO)
 282       goto delete_old;
 283
 284     strncpy(path2, folder_base, sizeof(path2)-1);
 285     path2[sizeof(path2)-1] = '\0';
 286
 287     if(F_ON(F_PRUNE_USES_ISO,ps_global)){             /* sent-mail-yyyy-mm */
 288         snprintf(path2 + strlen(path2), sizeof(path2)-strlen(path2), "-%4.4d-%2.2d", month_to_use/12,
 289                 month_to_use % 12 + 1);
 290     }
 291     else{
 292         strncpy(tmp, month_abbrev((month_to_use % 12)+1), 20);
 293         tmp[sizeof(tmp)-1] = '\0';
 294         lcase((unsigned char *) tmp);
 295 #ifdef  DOS
 296         if(*prune_cntxt->context != '{'){
 297           int i;
 298
 299           i = strlen(path2);
 300           snprintf(path2 + (size_t)((i > 4) ? 4 : i),
 301                    sizeof(path2)- ((i > 4) ? 4 : i),
 302                   "%2.2d%2.2d", (month_to_use % 12) + 1,
 303                   ((month_to_use / 12) - 1900) % 100);
 304         }
 305         else
 306 #endif
 307         snprintf(path2 + strlen(path2), sizeof(path2)-strlen(path2), "-%.20s-%d", tmp, month_to_use/12);
 308     }
 309
 310     Writechar(BELL, 0);
 311     snprintf(prompt, sizeof(prompt), "Move current \"%.50s\" to \"%.50s\"", folder_base, path2);
 312     if((exists = folder_exists(prune_cntxt, folder_base)) == FEX_ERROR){
 313         dprint((5, "prune_folders: Error testing existence\n"));
 314         return(0);
 315     }
 316     else if(exists == FEX_NOENT){       /* doesn't exist */
 317         dprint((5, "prune_folders: nothing to prune <%s %s>\n",
 318                    prune_cntxt->context ? prune_cntxt->context : "?",
 319                    folder_base ? folder_base : "?"));
 320         goto delete_old;
 321     }
 322     else if(!(exists & FEX_ISFILE)
 323             || pr == PRUNE_NO_AND_ASK || pr == PRUNE_NO_AND_NO
 324             || ((pr == PRUNE_ASK_AND_ASK || pr == PRUNE_ASK_AND_NO) &&
 325                 want_to(prompt, 'n', 0, h_wt_expire, WT_FLUSH_IN) == 'n')){
 326         dprint((5, "User declines renaming %s\n",
 327                ps_global->VAR_DEFAULT_FCC ? ps_global->VAR_DEFAULT_FCC : "?"));
 328         goto delete_old;
 329     }
 330
 331     prune_move_folder(folder_base, path2, prune_cntxt);
 332
 333   delete_old:
 334     if(pr == PRUNE_ASK_AND_ASK || pr == PRUNE_YES_AND_ASK
 335        || pr == PRUNE_NO_AND_ASK)
 336       delete_old_mail(mail_list, prune_cntxt, type);
 337
 338     if((sm = mail_list) != NULL){
 339         while(sm->name){
 340             fs_give((void **)&(sm->name));
 341             sm++;
 342         }
 343
 344         fs_give((void **)&mail_list);
 345     }
 346
 347     return(1);
 348 }
 349
 350
 351 /*----------------------------------------------------------------------
 352      Offer to delete old sent-mail folders
 353
 354   Args: sml       -- The list of sent-mail folders
 355         fcc_cntxt -- context to delete list of folders in
 356         type      -- label indicating type of folders being deleted
 357
 358   ----*/
 359 void
 360 delete_old_mail(struct sm_folder *sml, CONTEXT_S *fcc_cntxt, char *type)
 361 {
 362     char  prompt[150];
 363     struct sm_folder *sm;
 364
 365     for(sm = sml; sm != NULL && sm->name != NULL; sm++){
 366         if(sm->name[0] == '\0')         /* can't happen */
 367           continue;
 368
 369         snprintf(prompt, sizeof(prompt),
 370                "To save disk space, delete old%.10s mail folder \"%.30s\" ",
 371                type, sm->name);
 372         if(want_to(prompt, 'n', 0, h_wt_delete_old, WT_FLUSH_IN) == 'y'){
 373
 374             if(!context_delete(fcc_cntxt, NULL, sm->name)){
 375                 q_status_message1(SM_ORDER,
 376                                   3, 3, "Error deleting \"%s\".", sm->name);
 377                 dprint((1, "Error context_deleting %s in %s\n", sm->name,
 378                            (fcc_cntxt && fcc_cntxt->context)
 379                                      ? fcc_cntxt->context : "<null>"));
 380             }
 381             else{
 382                 int index;
 383
 384                 if((index = folder_index(sm->name, fcc_cntxt, FI_FOLDER)) >= 0)
 385                   folder_delete(index, FOLDERS(fcc_cntxt));
 386             }
 387         }else{
 388                 /* break;*/ /* skip out of the whole thing when he says no */
 389                 /* Decided to keep asking anyway */
 390         }
 391     }
 392 }
 393
 394
 395