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