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/* seq_save.c -- 1) synchronize sequences
* -- 2) save public sequences
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include "h/mh.h"
#include "seq_save.h"
#include "context_replace.h"
#include "context_del.h"
#include "seq_list.h"
#include "error.h"
#include <signal.h>
#include "signals.h"
#include "lock_file.h"
#include "m_mktemp.h"
#include "globals.h"
/*
* 1. If sequence is public and folder is readonly,
* then change it to be private
* 2a. If sequence is public, then add it to the sequences file
* in folder (name specified by mh-sequences profile entry).
* 2b. If sequence is private, then add it to the
* context file.
*/
void
seq_save (struct msgs *mp)
{
size_t i;
char flags, *cp, attr[BUFSIZ], seqfile[PATH_MAX];
FILE *fp;
sigset_t set, oset;
/* check if sequence information has changed */
if (!(mp->msgflags & SEQMOD)) {
if (mp->seqhandle) {
lkfclosedata (mp->seqhandle, mp->seqname);
mp->seqhandle = NULL;
free(mp->seqname);
mp->seqname = NULL;
}
return;
}
mp->msgflags &= ~SEQMOD;
fp = NULL;
flags = mp->msgflags; /* record folder flags */
/*
* If no mh-sequences file is defined, or if a mh-sequences file
* is defined but empty (*mh_seq == '\0'), then pretend folder
* is readonly. This will force all sequences to be private.
*/
if (mh_seq == NULL || *mh_seq == '\0')
set_readonly (mp);
else
snprintf (seqfile, sizeof(seqfile), "%s/%s", mp->foldpath, mh_seq);
for (i = 0; i < svector_size (mp->msgattrs); i++) {
snprintf (attr, sizeof(attr), "atr-%s-%s",
svector_at (mp->msgattrs, i), mp->foldpath);
/* get space separated list of sequence ranges */
if (!(cp = seq_list(mp, svector_at (mp->msgattrs, i)))) {
context_del (attr); /* delete sequence from context */
continue;
}
if (is_readonly(mp) || is_seq_private(mp, i)) {
priv:
/*
* sequence is private
*/
context_replace (attr, cp); /* update sequence in context */
} else {
/*
* sequence is public
*/
context_del (attr); /* delete sequence from context */
if (!fp) {
int failed_to_lock = 0;
/*
* Attempt to open file for public sequences.
* If that fails (probably because folder is
* readonly), then make sequence private.
*/
if (mp->seqhandle) {
fp = mp->seqhandle;
mp->seqhandle = NULL;
free(mp->seqname);
mp->seqname = NULL;
rewind(fp);
if (ftruncate(fileno(fp), 0) < 0) {
advise ("sequence file", "ftruncate");
}
} else if ((fp = lkfopendata (seqfile, "w", &failed_to_lock))
== NULL
&& (m_unlink (seqfile) == -1 ||
(fp = lkfopendata (seqfile, "w", &failed_to_lock))
== NULL)) {
if (failed_to_lock) {
admonish (attr, "unable to lock");
} else {
admonish (attr, "unable to write");
}
goto priv;
}
/* block a few signals */
sigemptyset (&set);
sigaddset(&set, SIGHUP);
sigaddset(&set, SIGINT);
sigaddset(&set, SIGQUIT);
sigaddset(&set, SIGTERM);
sigprocmask (SIG_BLOCK, &set, &oset);
}
fprintf (fp, "%s: %s\n", svector_at (mp->msgattrs, i), cp);
}
}
if (fp) {
lkfclosedata (fp, seqfile);
sigprocmask (SIG_SETMASK, &oset, &set); /* reset signal mask */
} else {
/*
* If folder is not readonly, and we didn't save any
* public sequences, then remove that file.
*/
if (!is_readonly(mp))
(void) m_unlink (seqfile);
}
/*
* Reset folder flag, since we may be
* pretending that folder is readonly.
*/
mp->msgflags = flags;
}
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