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

   1 /* folder_delmsgs.c -- "remove" SELECTED messages from a folder
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include <h/mh.h>
   9 #include <h/utils.h>
  10 #include "m_mktemp.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         /*
  44          * Write out the sequence and context files; this will release
  45          * any locks before the rmmproc is called.
  46          */
  47
  48         seq_save (mp);
  49         context_save ();
  50
  51         vec = argsplit(rmmproc, &prog, &vecp);
  52
  53         /*
  54          * argsplit allocates a MAXARGS vector by default,  If we need
  55          * something bigger, allocate it ourselves
  56          */
  57
  58         if (mp->numsel + vecp + 1 > MAXARGS)
  59             vec = mh_xrealloc(vec, (mp->numsel + vecp + 1) * sizeof *vec);
  60         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
  61             if (is_selected (mp, msgnum) &&
  62                 !(vec[vecp++] = strdup (m_name (msgnum))))
  63                 adios (NULL, "strdup failed");
  64         }
  65         vec[vecp] = NULL;
  66
  67         fflush (stdout);
  68
  69         switch (pid = fork()) {
  70         case -1:
  71             advise ("fork", "unable to");
  72             return -1;
  73
  74         case 0:
  75             execvp (prog, vec);
  76             fprintf (stderr, "unable to exec ");
  77             perror (rmmproc);
  78             _exit(1);
  79
  80         default:
  81             arglist_free(prog, vec);
  82             return pidwait(pid, -1);
  83         }
  84     }
  85
  86     /*
  87      * Either unlink or rename the SELECTED messages
  88      */
  89     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
  90         if (is_selected (mp, msgnum)) {
  91             /* unselect message */
  92             unset_selected (mp, msgnum);
  93             mp->numsel--;
  94
  95             /*
  96              *  Run the external hook on the message if one was specified in the context.
  97              *  All we have is the message number; we have changed to the directory
  98              *  containing the message.  So, we need to extract that directory to form
  99              *  the complete path.  Note that the caller knows the directory, but has
 100              *  no way of passing that to us.
 101              */
 102
 103             if (!nohook) {
 104                     (void)snprintf(msgpath, sizeof (msgpath), "%s/%d", mp->foldpath, msgnum);
 105                     (void)ext_hook("del-hook", msgpath, NULL);
 106                 }
 107
 108             dp = m_name (msgnum);
 109
 110             if (unlink_msgs) {
 111                 /* just unlink the messages */
 112                 if (m_unlink (dp) == -1) {
 113                     admonish (dp, "unable to unlink");
 114                     retval = -1;
 115                     continue;
 116                 }
 117             } else {
 118                 /* or rename messages with standard prefix */
 119                 strncpy (buf, m_backup (dp), sizeof(buf));
 120                 if (rename (dp, buf) == -1) {
 121                     admonish (buf, "unable to rename %s to", dp);
 122                     retval = -1;
 123                     continue;
 124                 }
 125             }
 126
 127             /* If removal was successful, decrement message count */
 128             unset_exists (mp, msgnum);
 129             mp->nummsg--;
 130         }
 131     }
 132
 133     /* Sanity check */
 134     if (mp->numsel != 0)
 135         adios (NULL, "oops, mp->numsel should be 0");
 136
 137     /* Mark that the sequence information has changed */
 138     mp->msgflags |= SEQMOD;
 139
 140     /*
 141      * Write out sequence and context files
 142      */
 143
 144     seq_save (mp);
 145     context_save ();
 146
 147     return retval;
 148 }