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- (djm) [openbsd-compat/sigact.c] Avoid NULL derefs in ancient sigaction

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replacement code; patch from ighighi AT gmail.com in bz#1240;
   ok dtucker
This commit is contained in:
Damien Miller 2008-06-15 10:55:34 +10:00
parent 30fd49e606
commit 8b7ab960df
2 changed files with 45 additions and 12 deletions
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7
ChangeLog
View File

@ -1,3 +1,8 @@
20080614
- (djm) [openbsd-compat/sigact.c] Avoid NULL derefs in ancient sigaction
replacement code; patch from ighighi AT gmail.com in bz#1240;
ok dtucker
20080613 20080613
- (dtucker) OpenBSD CVS Sync - (dtucker) OpenBSD CVS Sync
- deraadt@cvs.openbsd.org 2008/06/13 09:44:36 - deraadt@cvs.openbsd.org 2008/06/13 09:44:36
@ -4364,4 +4369,4 @@
OpenServer 6 and add osr5bigcrypt support so when someone migrates OpenServer 6 and add osr5bigcrypt support so when someone migrates
passwords between UnixWare and OpenServer they will still work. OK dtucker@ passwords between UnixWare and OpenServer they will still work. OK dtucker@
$Id: ChangeLog,v 1.5010 2008/06/13 23:14:46 dtucker Exp $ $Id: ChangeLog,v 1.5011 2008/06/15 00:55:34 djm Exp $

50
openbsd-compat/sigact.c
View File

@ -36,6 +36,7 @@
/* OPENBSD ORIGINAL: lib/libcurses/base/sigaction.c */ /* OPENBSD ORIGINAL: lib/libcurses/base/sigaction.c */
#include "includes.h" #include "includes.h"
#include <errno.h>
#include <signal.h> #include <signal.h>
#include "sigact.h" #include "sigact.h"
@ -47,28 +48,39 @@
int int
sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact) sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact)
{ {
return sigvec(sig, &(sigact->sv), &(osigact->sv)); return sigvec(sig, sigact ? &sigact->sv : NULL,
osigact ? &osigact->sv : NULL);
} }
int int
sigemptyset (sigset_t * mask) sigemptyset (sigset_t *mask)
{ {
if (!mask) {
errno = EINVAL;
return -1;
}
*mask = 0; *mask = 0;
return 0; return 0;
} }
int int
sigprocmask (int mode, sigset_t * mask, sigset_t * omask) sigprocmask (int mode, sigset_t *mask, sigset_t *omask)
{ {
sigset_t current = sigsetmask(0); sigset_t current = sigsetmask(0);
if (omask) *omask = current; if (!mask) {
errno = EINVAL;
return -1;
}
if (mode==SIG_BLOCK) if (omask)
*omask = current;
if (mode == SIG_BLOCK)
current |= *mask; current |= *mask;
else if (mode==SIG_UNBLOCK) else if (mode == SIG_UNBLOCK)
current &= ~*mask; current &= ~*mask;
else if (mode==SIG_SETMASK) else if (mode == SIG_SETMASK)
current = *mask; current = *mask;
sigsetmask(current); sigsetmask(current);
@ -76,28 +88,44 @@ sigprocmask (int mode, sigset_t * mask, sigset_t * omask)
} }
int int
sigsuspend (sigset_t * mask) sigsuspend (sigset_t *mask)
{ {
if (!mask) {
errno = EINVAL;
return -1;
}
return sigpause(*mask); return sigpause(*mask);
} }
int int
sigdelset (sigset_t * mask, int sig) sigdelset (sigset_t *mask, int sig)
{ {
if (!mask) {
errno = EINVAL;
return -1;
}
*mask &= ~sigmask(sig); *mask &= ~sigmask(sig);
return 0; return 0;
} }
int int
sigaddset (sigset_t * mask, int sig) sigaddset (sigset_t *mask, int sig)
{ {
if (!mask) {
errno = EINVAL;
return -1;
}
*mask |= sigmask(sig); *mask |= sigmask(sig);
return 0; return 0;
} }
int int
sigismember (sigset_t * mask, int sig) sigismember (sigset_t *mask, int sig)
{ {
if (!mask) {
errno = EINVAL;
return -1;
}
return (*mask & sigmask(sig)) != 0; return (*mask & sigmask(sig)) != 0;
} }