-
/*
* context_save.c -- write out the updated context file
*
- * $Id$
- *
* 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.
void
context_save (void)
{
- int action;
- register struct node *np;
- FILE *out;
- sigset_t set, oset;
-
- if (!(ctxflags & CTXMOD))
- return;
- ctxflags &= ~CTXMOD;
-
- if ((action = m_chkids ()) > 0)
- return; /* child did it for us */
-
- /* 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 = lkfopen (ctxpath, "w")))
- 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);
- lkfclose (out, ctxpath);
-
- SIGPROCMASK (SIG_SETMASK, &oset, &set); /* reset the signal mask */
-
- if (action == 0)
- _exit (0); /* we are child, time to die */
+ int action;
+ register struct node *np;
+ FILE *out;
+ sigset_t set, oset;
+
+ /* No context in use -- silently ignore any changes! */
+ if (!ctxpath)
+ return;
+
+ if (!(ctxflags & CTXMOD))
+ return;
+ ctxflags &= ~CTXMOD;
+
+ if ((action = m_chkids ()) > 0)
+ return; /* child did it for us */
+
+ /* 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 = lkfopen (ctxpath, "w")))
+ 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);
+ lkfclose (out, ctxpath);
+
+ SIGPROCMASK (SIG_SETMASK, &oset, &set); /* reset the signal mask */
+
+ if (action == 0)
+ _exit (0); /* we are child, time to die */
}
/*
static int
m_chkids (void)
{
- int i;
- pid_t pid;
+ int i;
+ pid_t pid;
- if (getuid () == geteuid ())
- return (-1);
+ if (getuid () == geteuid ())
+ return (-1);
- for (i = 0; (pid = fork ()) == -1 && i < 5; i++)
- sleep (5);
+ for (i = 0; (pid = fork ()) == -1 && i < 5; i++)
+ sleep (5);
- switch (pid) {
- case -1:
- break;
+ switch (pid) {
+ case -1:
+ break;
- case 0:
- setgid (getgid ());
- setuid (getuid ());
- break;
+ case 0:
+ setgid (getgid ());
+ setuid (getuid ());
+ break;
- default:
- pidwait (pid, -1);
- break;
- }
+ default:
+ pidwait (pid, -1);
+ break;
+ }
- return pid;
+ return pid;
}