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Ignore SIGSYS when issuing pioctl syscall

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Ignore SIGSYS when we issue the pioctl syscall, so we don't dump core
when the kernel module hasn't yet been installed on several platforms.
Also, restore the old SIGSYS signal handler afterwards, so we don't
cause any side-effects.

Reviewed-on: http://gerrit.openafs.org/81
Verified-by: Andrew Deason <adeason@sinenomine.net>
Verified-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Russ Allbery <rra@stanford.edu>
This commit is contained in:
Andrew Deason 2009-07-14 11:29:01 -05:00 committed by Russ Allbery
parent 00e32618c0
commit 4f36dd089a
1 changed files with 8 additions and 3 deletions
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11
src/sys/pioctl.c
View File

@ -16,6 +16,7 @@
#include <afsconfig.h>
#include <afs/param.h>
#include <signal.h>
#include <afs/afs_args.h>
#if defined(AFS_SUN_ENV) && !defined(AFS_SUN5_ENV)
@ -48,10 +49,10 @@ int
lpioctl(char *path, int cmd, char *cmarg, int follow)
{
int errcode, rval;
#if defined(AFS_FBSD_ENV)
#ifndef AFS_LINUX20_ENV
/* As kauth/user.c says, handle smoothly the case where no AFS system call
* exists (yet). Why don't more platforms have trouble here? Matt */
sig_t old = (int (*)())signal(SIGSYS, SIG_IGN);
* exists (yet). */
sig_t old = signal(SIGSYS, SIG_IGN);
#endif
#if defined(AFS_LINUX20_ENV)
@ -70,6 +71,10 @@ lpioctl(char *path, int cmd, char *cmarg, int follow)
errcode = syscall(AFS_SYSCALL, AFSCALL_PIOCTL, path, cmd, cmarg, follow);
#endif
#ifndef AFS_LINUX20_ENV
signal(SIGSYS, old);
#endif
return (errcode);
}