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Redirect stdin from /dev/null.

This commit is contained in:
hjp 2004-09-06 08:37:03 +00:00
parent a22110e328
commit 002657d522
1 changed files with 9 additions and 2 deletions
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11
obwrap/obwrap.c
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@ -1,5 +1,5 @@
char obwrap_c_rcsid[] = char obwrap_c_rcsid[] =
"$Id: "; "$Id: obwrap.c,v 1.3 2004-09-06 08:37:03 hjp Exp $";
/* obwrap - wrapper for omniback scripts /* obwrap - wrapper for omniback scripts
* *
* Omniback leaves a lot of file descriptors open when executing its * Omniback leaves a lot of file descriptors open when executing its
@ -15,6 +15,8 @@ char obwrap_c_rcsid[] =
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <pwd.h> #include <pwd.h>
#include <grp.h>
#include <fcntl.h>
#include <unistd.h> #include <unistd.h>
#define nonstderr stdout /* Omniback bogosity */ #define nonstderr stdout /* Omniback bogosity */
@ -39,7 +41,6 @@ int main(int argc, char **argv) {
case 'u': { case 'u': {
char *p; char *p;
uid_t uid; uid_t uid;
gid_t gid;
uid = strtol(optarg, &p, 0); uid = strtol(optarg, &p, 0);
if (*p != '\0') { if (*p != '\0') {
@ -79,6 +80,12 @@ int main(int argc, char **argv) {
} }
if (optind == argc) usage(); if (optind == argc) usage();
/* close all filedescriptors except stdout,
* redirect stdin from /dev/null,
* stderr from stdout
*/
close(0);
open("/dev/null", O_RDONLY);
for (i = 2; i < open_max; i++) { for (i = 2; i < open_max; i++) {
close(i); close(i);
} }