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 if (!(ctxflags & CTXMOD))
33 if ((action = m_chkids ()) > 0)
34 return; /* child did it for us */
36 /* block a few signals */
38 sigaddset (&set, SIGHUP);
39 sigaddset (&set, SIGINT);
40 sigaddset (&set, SIGQUIT);
41 sigaddset (&set, SIGTERM);
42 SIGPROCMASK (SIG_BLOCK, &set, &oset);
44 if (!(out = lkfopen (ctxpath, "w")))
45 adios (ctxpath, "unable to write");
46 for (np = m_defs; np; np = np->n_next)
48 fprintf (out, "%s: %s\n", np->n_name, np->n_field);
49 lkfclose (out, ctxpath);
51 SIGPROCMASK (SIG_SETMASK, &oset, &set); /* reset the signal mask */
54 _exit (0); /* we are child, time to die */
58 * This hack brought to you so we can handle set[ug]id MH programs.
59 * If we return -1, then no fork is made, we update .mh_profile
60 * normally, and return to the caller normally. If we return 0,
61 * then the child is executing, .mh_profile is modified after
62 * we set our [ug]ids to the norm. If we return > 0, then the
63 * parent is executed and .mh_profile has already be modified.
64 * We can just return to the caller immediately.
73 if (getuid () == geteuid ())
76 for (i = 0; (pid = fork ()) == -1 && i < 5; i++)