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;
  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 = (char **) calloc ((size_t) (mp->numsel + 2), sizeof(*vec));
  44         if (vec == NULL)
  45             adios (NULL, "unable to allocate exec vector");
  46         vecp = 1;
  47         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
  48             if (is_selected (mp, msgnum) &&
  49                 !(vec[vecp++] = strdup (m_name (msgnum))))
  50                 adios (NULL, "strdup failed");
  51         }
  52         vec[vecp] = NULL;
  53
  54         fflush (stdout);
  55         vec[0] = r1bindex (rmmproc, '/');
  56
  57         switch (pid = vfork()) {
  58         case -1:
  59             advise ("fork", "unable to");
  60             return -1;
  61
  62         case 0:
  63             execvp (rmmproc, vec);
  64             fprintf (stderr, "unable to exec ");
  65             perror (rmmproc);
  66             _exit (-1);
  67
  68         default:
  69             return (pidwait (pid, -1));
  70         }
  71     }
  72
  73     /*
  74      * Either unlink or rename the SELECTED messages
  75      */
  76     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
  77         if (is_selected (mp, msgnum)) {
  78             /* unselect message */
  79             unset_selected (mp, msgnum);
  80             mp->numsel--;
  81
  82             /*
  83              *  Run the external hook on the message if one was specified in the context.
  84              *  All we have is the message number; we have changed to the directory
  85              *  containing the message.  So, we need to extract that directory to form
  86              *  the complete path.  Note that the caller knows the directory, but has
  87              *  no way of passing that to us.
  88              */
  89
  90             if (!nohook) {
  91                     (void)snprintf(msgpath, sizeof (msgpath), "%s/%d", mp->foldpath, msgnum);
  92                     (void)ext_hook("del-hook", msgpath, (char *)0);
  93                 }
  94
  95             dp = m_name (msgnum);
  96
  97             if (unlink_msgs) {
  98                 /* just unlink the messages */
  99                 if (unlink (dp) == -1) {
 100                     admonish (dp, "unable to unlink");
 101                     retval = -1;
 102                     continue;
 103                 }
 104             } else {
 105                 /* or rename messages with standard prefix */
 106                 strncpy (buf, m_backup (dp), sizeof(buf));
 107                 if (rename (dp, buf) == -1) {
 108                     admonish (buf, "unable to rename %s to", dp);
 109                     retval = -1;
 110                     continue;
 111                 }
 112             }
 113
 114             /* If removal was successful, decrement message count */
 115             unset_exists (mp, msgnum);
 116             mp->nummsg--;
 117         }
 118     }
 119
 120     /* Sanity check */
 121     if (mp->numsel != 0)
 122         adios (NULL, "oops, mp->numsel should be 0");
 123
 124     /* Mark that the sequence information has changed */
 125     mp->msgflags |= SEQMOD;
 126
 127     return retval;
 128 }