2 * context_save.c -- write out the updated context file
4 * This code is Copyright (c) 2002, by the authors of nmh. See the
5 * COPYRIGHT file in the root directory of the nmh distribution for
6 * complete copyright information.
10 #include <h/signals.h>
15 static int m_chkids(void);
22 register struct node *np;
26 /* No context in use -- silently ignore any changes! */
30 if (!(ctxflags & CTXMOD))
34 if ((action = m_chkids ()) > 0)
35 return; /* child did it for us */
37 /* block a few signals */
39 sigaddset (&set, SIGHUP);
40 sigaddset (&set, SIGINT);
41 sigaddset (&set, SIGQUIT);
42 sigaddset (&set, SIGTERM);
43 SIGPROCMASK (SIG_BLOCK, &set, &oset);
45 if (!(out = lkfopen (ctxpath, "w")))
46 adios (ctxpath, "unable to write");
47 for (np = m_defs; np; np = np->n_next)
49 fprintf (out, "%s: %s\n", np->n_name, np->n_field);
50 lkfclose (out, ctxpath);
52 SIGPROCMASK (SIG_SETMASK, &oset, &set); /* reset the signal mask */
55 _exit (0); /* we are child, time to die */
59 * This hack brought to you so we can handle set[ug]id MH programs.
60 * If we return -1, then no fork is made, we update .mh_profile
61 * normally, and return to the caller normally. If we return 0,
62 * then the child is executing, .mh_profile is modified after
63 * we set our [ug]ids to the norm. If we return > 0, then the
64 * parent is executed and .mh_profile has already be modified.
65 * We can just return to the caller immediately.
74 if (getuid () == geteuid ())
77 for (i = 0; (pid = fork ()) == -1 && i < 5; i++)