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Use posix_spawn instead of vfork to avoid signal races.

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This commit is contained in:
Roy Marples 2008-02-02 17:28:22 +00:00
parent 091c081bd1
commit 3712922130
1 changed files with 10 additions and 13 deletions
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23
configure.c
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@ -40,6 +40,7 @@
#include <errno.h>
#include <netdb.h>
#include <resolv.h>
#include <spawn.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
@ -56,6 +57,8 @@
#include "logger.h"
#include "socket.h"
extern char **environ;
static int file_in_path (const char *file)
{
char *p = getenv ("PATH");
@ -87,9 +90,9 @@ static int file_in_path (const char *file)
static int exec_cmd (const char *cmd, const char *args, ...)
{
va_list va;
pid_t pid;
char **argv;
int n = 1;
int ret;
va_start (va, args);
while (va_arg (va, char *) != NULL)
@ -105,19 +108,13 @@ static int exec_cmd (const char *cmd, const char *args, ...)
n++;
va_end (va);
if ((pid = vfork ()) == 0) {
if (execvp (cmd, argv) && errno != ENOENT)
logger (LOG_ERR, "error executing \"%s\": %s",
cmd, strerror (errno));
_exit (0);
} else if (pid == -1) {
logger (LOG_ERR, "vfork: %s", strerror (errno));
free (argv);
return (-1);
}
errno = 0;
ret = posix_spawnp (NULL, argv[0], NULL, NULL, argv, environ);
if (ret != 0 || errno != 0)
logger (LOG_ERR, "error executing \"%s\": %s",
cmd, strerror (errno));
free (argv);
return (0);
return (ret);
}
static void exec_script (const char *script, const char *infofile,