This is m_update.c in view mode; [Download] [Up]
/* m_update.c - update the profile */
#include "../h/mh.h"
#include <stdio.h>
#include <signal.h>
#ifndef sigmask
#define sigmask(s) (1 << ((s) - 1))
#endif not sigmask
static int m_chkids();
void m_update () {
int action;
#ifndef BSD42
TYPESIG (*hstat) (), (*istat) (), (*qstat) (), (*tstat) ();
#else BSD42
int smask;
#endif BSD42
register struct node *np;
FILE * out;
if (!(ctxflags & CTXMOD))
return;
ctxflags &= ~CTXMOD;
if ((action = m_chkids ()) > OK)
return; /* child did it for us */
#ifndef BSD42
hstat = signal (SIGHUP, SIG_IGN);
istat = signal (SIGINT, SIG_IGN);
qstat = signal (SIGQUIT, SIG_IGN);
tstat = signal (SIGTERM, SIG_IGN);
#else BSD42
smask = sigblock (sigmask (SIGHUP) | sigmask (SIGINT)
| sigmask (SIGQUIT) | sigmask (SIGTERM));
#endif BSD42
if ((out = fopen (ctxpath, "w")) == NULL)
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);
(void) fclose (out);
#ifndef BSD42
(void) signal (SIGHUP, hstat);
(void) signal (SIGINT, istat);
(void) signal (SIGQUIT, qstat);
(void) signal (SIGTERM, tstat);
#else BSD42
(void) sigsetmask (smask);
#endif BSD42
if (action == OK)
_exit (0); /* we are child, time to die */
}
/* */
/* This hack brought to you so we can handle set[ug]id MH programs. If we
return NOTOK, then no fork is made, we update .mh_profile normally, and
return to the caller normally. If we return 0, then the child is
executing, .mh_profile is modified after we set our [ug]ids to the norm.
If we return > 0, then the parent is executed and .mh_profile has
already be modified. We can just return to the caller immediately. */
static int m_chkids () {
int i,
child_id;
if (getuid () == geteuid ())
return (NOTOK);
for (i = 0; (child_id = fork ()) == -1 && i < 5; i++)
sleep (5);
switch (child_id) {
case NOTOK:
break;
case OK:
(void) setgid (getgid ());
(void) setuid (getuid ());
break;
default:
(void) pidwait (child_id, NOTOK);
break;
}
return child_id;
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.