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/* Functional tests for spawn() syscall invoked indirectly via posix_spawn()
or system(). */
#include <assert.h>
#include <fcntl.h>
#include <spawn.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/wait.h>
#define EXE_NAME "../../../tests/true"
static volatile int sigchld_handled = 0;
static void sigchld_handler(int sig, siginfo_t *sip, void *ucontext) {
assert(sig == SIGCHLD);
sigchld_handled = 1;
}
int main(int argc, char *const argv[], char *const envp[]) {
int ret = system(EXE_NAME);
if (ret != 0)
perror("system");
/* system() */
ret = system(NULL);
if (ret == 0)
fprintf(stderr, "system() succeeded");
/* posix_spawn(), no file actions, no attrs */
char *const argv_exe[] = {"true", NULL};
pid_t child;
ret = posix_spawn(&child, EXE_NAME, NULL, NULL, argv_exe, envp);
if (ret != 0)
perror("posix_spawn");
waitpid(child, NULL, 0);
/* posix_spawn(), file actions, no attrs */
posix_spawn_file_actions_t fa;
ret = posix_spawn_file_actions_init(&fa);
if (ret != 0)
perror("posix_spawn_file_actions_init");
ret = posix_spawn_file_actions_addopen(&fa, 10, "/dev/null", O_RDONLY, 0);
if (ret != 0)
perror("posix_spawn_file_actions_addopen");
ret = posix_spawn(&child, EXE_NAME, &fa, NULL, argv_exe, envp);
if (ret != 0)
perror("posix_spawn");
waitpid(child, NULL, 0);
ret = posix_spawn_file_actions_destroy(&fa);
if (ret != 0)
perror("posix_spawn_file_actions_destroy");
/* posix_spawn(), no file actions, attrs */
posix_spawnattr_t spa;
ret = posix_spawnattr_init(&spa);
if (ret != 0)
perror("posix_spawnattr_init");
ret = posix_spawnattr_setflags(&spa, POSIX_SPAWN_RESETIDS);
if (ret != 0)
perror("posix_spawnattr_setflags");
ret = posix_spawn(&child, EXE_NAME, NULL, &spa, argv_exe, envp);
if (ret != 0)
perror("posix_spawn");
waitpid(child, NULL, 0);
ret = posix_spawnattr_destroy(&spa);
if (ret != 0)
perror("posix_spawnattr_destroy");
/* posix_spawn(), no file actions, no attrs, test SIGCHLD delivery */
struct sigaction act;
bzero(&act, sizeof(act));
act.sa_sigaction = sigchld_handler;
act.sa_flags = SA_SIGINFO;
ret = sigaction(SIGCHLD, &act, NULL);
if (ret != 0)
perror("sigaction");
sigchld_handled = 0;
ret = posix_spawn(&child, EXE_NAME, NULL, NULL, argv_exe, envp);
if (ret != 0)
perror("posix_spawn");
waitpid(child, NULL, 0);
if (sigchld_handled == 1) {
printf("PASS\n");
} else {
printf("FAIL\n");
}
/* posix_spawn(), no file actions, attrs, test *no* SIGCHLD delivery */
ret = posix_spawnattr_init(&spa);
if (ret != 0)
perror("posix_spawnattr_init");
ret = posix_spawnattr_setflags(&spa, POSIX_SPAWN_NOSIGCHLD_NP);
if (ret != 0)
perror("posix_spawnattr_setflags");
sigchld_handled = 0;
ret = posix_spawn(&child, EXE_NAME, NULL, &spa, argv_exe, envp);
if (ret != 0)
perror("posix_spawn");
waitpid(child, NULL, 0);
if (sigchld_handled == 0) {
printf("PASS\n");
} else {
printf("FAIL\n");
}
ret = posix_spawnattr_destroy(&spa);
if (ret != 0)
perror("posix_spawnattr_destroy");
return 0;
}
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