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/* Tests variant of SYS_execve where the first argument is a file descriptor. */
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/execx.h>
#include <sys/syscall.h>
#include <sys/wait.h>
static void test_EFAULT(void) {
int ret = syscall(SYS_execve, -1, 0, 0, 0);
int error = errno;
if ((ret != -1) || (error != EFAULT))
fprintf(stderr, "Expecting EFAULT\n");
}
static void test_EBADF(void) {
int ret = syscall(SYS_execve, -1, 0, 0, EXEC_DESCRIPTOR);
int error = errno;
if ((ret != -1) || (error != EBADF))
fprintf(stderr, "Expecting EBADF\n");
}
static int test_fexecve(char * const *envp) {
int fd = open("/usr/bin/printf", O_EXEC);
if (fd < 0) {
perror("open");
return 1;
}
pid_t pid = fork();
if (pid == -1) {
perror("fork");
return 1;
} else if (pid > 0) {
/* parent */
} else {
char *argv[] = {"printf", "PASSED\n", NULL};
if (fexecve(fd, argv, envp) < 0) {
perror("fexecve");
_exit(1);
}
}
wait(NULL);
return 0;
}
int main(int argc, const char *argv[], char * const *envp) {
/* First exercise the syscall with some invalid input. */
test_EFAULT();
test_EBADF();
return test_fexecve(envp);
}
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