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Redirect stdout and stderr to /dev/null before launching a spawned process

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This commit is contained in:
Andreas Öman 2009-12-08 22:29:30 +00:00
parent 114b641bdd
commit d6b7a8c21e
1 changed files with 15 additions and 2 deletions
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17
src/spawn.c
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@ -25,6 +25,7 @@
#include <errno.h> #include <errno.h>
#include <assert.h> #include <assert.h>
#include <syslog.h> #include <syslog.h>
#include <fcntl.h>
#include "tvhead.h" #include "tvhead.h"
#include "spawn.h" #include "spawn.h"
@ -134,7 +135,7 @@ int
spawn_and_store_stdout(const char *prog, char *const argv[], char **outp) spawn_and_store_stdout(const char *prog, char *const argv[], char **outp)
{ {
pid_t p; pid_t p;
int fd[2], r, totalsize = 0; int fd[2], r, totalsize = 0, f;
char *outbuf; char *outbuf;
struct spawn_output_buf_queue bufs; struct spawn_output_buf_queue bufs;
spawn_output_buf_t *b = NULL; spawn_output_buf_t *b = NULL;
@ -168,10 +169,22 @@ spawn_and_store_stdout(const char *prog, char *const argv[], char **outp)
close(fd[0]); close(fd[0]);
dup2(fd[1], 1); dup2(fd[1], 1);
close(fd[1]); close(fd[1]);
f = open("/dev/null", O_RDWR);
if(f == -1) {
syslog(LOG_ERR,
"spawn: pid %d cannot open /dev/null for redirect %s -- %s",
getpid(), prog, strerror(errno));
exit(1);
}
dup2(f, 0);
dup2(f, 2);
close(f);
execve(prog, argv, environ); execve(prog, argv, environ);
syslog(LOG_ERR, "spawn: pid %d cannot execute %s -- %s", syslog(LOG_ERR, "spawn: pid %d cannot execute %s -- %s",
getpid(), prog, strerror(errno)); getpid(), prog, strerror(errno));
close(1);
exit(1); exit(1);
} }