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/* context_save.c -- write out the updated context file
*
* 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.
*/
/*
* This function used to support setuid/setgid programs by writing
* the file as the user. But that code, m_chkids(), was removed
* because there no longer are setuid/setgid programs in nmh.
*/
#include "h/mh.h"
#include "context_save.h"
#include "error.h"
#include <signal.h>
#include "signals.h"
#include "lock_file.h"
#include "globals.h"
void
context_save (void)
{
struct node *np;
FILE *out;
sigset_t set, oset;
int failed_to_lock = 0;
/* No context in use -- silently ignore any changes! */
if (!ctxpath)
return;
if (!context_dirty)
return;
context_dirty = false;
/* block a few signals */
sigemptyset (&set);
sigaddset (&set, SIGHUP);
sigaddset (&set, SIGINT);
sigaddset (&set, SIGQUIT);
sigaddset (&set, SIGTERM);
sigprocmask (SIG_BLOCK, &set, &oset);
if (!(out = lkfopendata (ctxpath, "w", &failed_to_lock))) {
if (failed_to_lock)
adios (ctxpath, "failed to lock");
adios (ctxpath, "unable to write");
}
for (np = m_defs; np; np = np->n_next)
if (np->n_context)
fprintf (out, "%s: %s\n", np->n_name, np->n_field);
lkfclosedata (out, ctxpath);
sigprocmask (SIG_SETMASK, &oset, &set); /* reset the signal mask */
}
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