git.marmaro.de Git - mmh/blob - sbr/seq_save.c

   1 /*
   2 ** seq_save.c -- 1) synchronize sequences
   3 **            -- 2) save public sequences
   4 **
   5 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   6 ** COPYRIGHT file in the root directory of the nmh distribution for
   7 ** complete copyright information.
   8 */
   9
  10 #include <h/mh.h>
  11 #include <h/signals.h>
  12
  13
  14 /*
  15 ** 1.  If sequence is public and folder is readonly,
  16 **     then change it to be private
  17 ** 2a. If sequence is public, then add it to the sequences file
  18 **     in folder (name specified by mh-sequences profile entry).
  19 ** 2b. If sequence is private, then add it to the
  20 **     context file.
  21 */
  22
  23 void
  24 seq_save(struct msgs *mp)
  25 {
  26         int i;
  27         char flags, *cp, attr[BUFSIZ], seqfile[PATH_MAX];
  28         FILE *fp;
  29         sigset_t set, oset;
  30
  31         /* check if sequence information has changed */
  32         if (!(mp->msgflags & SEQMOD))
  33                 return;
  34         mp->msgflags &= ~SEQMOD;
  35
  36         fp = NULL;
  37         flags = mp->msgflags;  /* record folder flags */
  38
  39         /*
  40         ** If no mh-sequences file is defined, or if a mh-sequences file
  41         ** is defined but empty (*mh_seq == '\0'), then pretend folder
  42         ** is readonly.  This will force all sequences to be private.
  43         */
  44         if (mh_seq == NULL || *mh_seq == '\0')
  45                 set_readonly(mp);
  46         else
  47                 snprintf(seqfile, sizeof(seqfile), "%s/%s", mp->foldpath,
  48                                 mh_seq);
  49
  50         for (i = 0; mp->msgattrs[i]; i++) {
  51                 snprintf(attr, sizeof(attr), "atr-%s-%s", mp->msgattrs[i],
  52                                 mp->foldpath);
  53
  54                 /* get space separated list of sequence ranges */
  55                 if (!(cp = seq_list(mp, mp->msgattrs[i]))) {
  56                         context_del(attr);  /* delete sequence from context */
  57                         continue;
  58                 }
  59
  60                 if (is_readonly(mp) || is_seq_private(mp, i)) {
  61 priv:
  62                         /* sequence is private */
  63                         context_replace(attr, cp);  /* update seq in ctx */
  64                 } else {
  65                         /* sequence is public */
  66                         context_del(attr);  /* delete sequence from context */
  67
  68                         if (!fp) {
  69                                 /*
  70                                 ** Attempt to open file for public sequences.
  71                                 ** If that fails (probably because folder is
  72                                 ** readonly), then make sequence private.
  73                                 */
  74                                 if ((fp = lkfopen(seqfile, "w")) == NULL
  75                                                 && (unlink(seqfile) == -1 ||
  76                                                 (fp = lkfopen(seqfile, "w"))
  77                                                 == NULL)) {
  78                                         admonish(attr, "unable to write");
  79                                         goto priv;
  80                                 }
  81
  82                                 /* block a few signals */
  83                                 sigemptyset(&set);
  84                                 sigaddset(&set, SIGHUP);
  85                                 sigaddset(&set, SIGINT);
  86                                 sigaddset(&set, SIGQUIT);
  87                                 sigaddset(&set, SIGTERM);
  88                                 SIGPROCMASK(SIG_BLOCK, &set, &oset);
  89                         }
  90                         fprintf(fp, "%s: %s\n", mp->msgattrs[i], cp);
  91                 }
  92         }
  93
  94         if (fp) {
  95                 lkfclose(fp, seqfile);
  96                 SIGPROCMASK(SIG_SETMASK, &oset, &set);  /* reset signal mask */
  97         } else {
  98                 /*
  99                 ** If folder is not readonly, and we didn't save any
 100                 ** public sequences, then remove that file.
 101                 */
 102                 if (!is_readonly(mp))
 103                         unlink(seqfile);
 104         }
 105
 106         /*
 107         ** Reset folder flag, since we may be
 108         ** pretending that folder is readonly.
 109         */
 110         mp->msgflags = flags;
 111 }