diplodocus.org Git - nmh/blob - sbr/folder_delmsgs.c

   1
   2 /*
   3  * folder_delmsgs.c -- "remove" SELECTED messages from a folder
   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
  12 /*
  13  * 1) If we are using an external rmmproc, then exec it.
  14  * 2) Else if unlink_msgs is non-zero, then unlink the
  15  *    SELECTED messages.
  16  * 3) Else rename SELECTED messages by prefixing name
  17  *    with a standard prefix.
  18  *
  19  * If there is an error, return -1, else return 0.
  20  */
  21
  22 int
  23 folder_delmsgs (struct msgs *mp, int unlink_msgs, int nohook)
  24 {
  25     pid_t pid;
  26     int msgnum, vecp, retval = 0;
  27     char buf[100], *dp, **vec, *prog;
  28     char        msgpath[BUFSIZ];
  29
  30     /*
  31      * If "rmmproc" is defined, exec it to remove messages.
  32      */
  33     if (rmmproc) {
  34         /* Unset the EXISTS flag for each message to be removed */
  35         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
  36             if (is_selected (mp, msgnum))
  37                 unset_exists (mp, msgnum);
  38         }
  39
  40         /* Mark that the sequence information has changed */
  41         mp->msgflags |= SEQMOD;
  42
  43         vec = argsplit(rmmproc, &prog, &vecp);
  44
  45         /*
  46          * argsplit allocates a MAXARGS vector by default,  If we need
  47          * something bigger, allocate it ourselves
  48          */
  49
  50         if (mp->numsel + vecp + 1 > MAXARGS)
  51             vec = (char **) realloc (vec, (size_t) ((mp->numsel + vecp + 1) *
  52                                                      sizeof(*vec)));
  53         if (vec == NULL)
  54             adios (NULL, "unable to allocate exec vector");
  55         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
  56             if (is_selected (mp, msgnum) &&
  57                 !(vec[vecp++] = strdup (m_name (msgnum))))
  58                 adios (NULL, "strdup failed");
  59         }
  60         vec[vecp] = NULL;
  61
  62         fflush (stdout);
  63
  64         switch (pid = fork()) {
  65         case -1:
  66             advise ("fork", "unable to");
  67             return -1;
  68
  69         case 0:
  70             execvp (prog, vec);
  71             fprintf (stderr, "unable to exec ");
  72             perror (rmmproc);
  73             _exit (-1);
  74
  75         default:
  76             arglist_free(prog, vec);
  77             return (pidwait (pid, -1));
  78         }
  79     }
  80
  81     /*
  82      * Either unlink or rename the SELECTED messages
  83      */
  84     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
  85         if (is_selected (mp, msgnum)) {
  86             /* unselect message */
  87             unset_selected (mp, msgnum);
  88             mp->numsel--;
  89
  90             /*
  91              *  Run the external hook on the message if one was specified in the context.
  92              *  All we have is the message number; we have changed to the directory
  93              *  containing the message.  So, we need to extract that directory to form
  94              *  the complete path.  Note that the caller knows the directory, but has
  95              *  no way of passing that to us.
  96              */
  97
  98             if (!nohook) {
  99                     (void)snprintf(msgpath, sizeof (msgpath), "%s/%d", mp->foldpath, msgnum);
 100                     (void)ext_hook("del-hook", msgpath, (char *)0);
 101                 }
 102
 103             dp = m_name (msgnum);
 104
 105             if (unlink_msgs) {
 106                 /* just unlink the messages */
 107                 if (unlink (dp) == -1) {
 108                     admonish (dp, "unable to unlink");
 109                     retval = -1;
 110                     continue;
 111                 }
 112             } else {
 113                 /* or rename messages with standard prefix */
 114                 strncpy (buf, m_backup (dp), sizeof(buf));
 115                 if (rename (dp, buf) == -1) {
 116                     admonish (buf, "unable to rename %s to", dp);
 117                     retval = -1;
 118                     continue;
 119                 }
 120             }
 121
 122             /* If removal was successful, decrement message count */
 123             unset_exists (mp, msgnum);
 124             mp->nummsg--;
 125         }
 126     }
 127
 128     /* Sanity check */
 129     if (mp->numsel != 0)
 130         adios (NULL, "oops, mp->numsel should be 0");
 131
 132     /* Mark that the sequence information has changed */
 133     mp->msgflags |= SEQMOD;
 134
 135     return retval;
 136 }