1 /* Tests variant of SYS_execve where the first argument is a file descriptor. */
2
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <stdio.h>
6 #include <unistd.h>
7 #include <sys/execx.h>
8 #include <sys/syscall.h>
9 #include <sys/wait.h>
10
test_EFAULT(void)11 static void test_EFAULT(void) {
12 int ret = syscall(SYS_execve, -1, 0, 0, 0);
13 int error = errno;
14 if ((ret != -1) || (error != EFAULT))
15 fprintf(stderr, "Expecting EFAULT\n");
16 }
17
test_EBADF(void)18 static void test_EBADF(void) {
19 int ret = syscall(SYS_execve, -1, 0, 0, EXEC_DESCRIPTOR);
20 int error = errno;
21 if ((ret != -1) || (error != EBADF))
22 fprintf(stderr, "Expecting EBADF\n");
23 }
24
test_fexecve(char * const * envp)25 static int test_fexecve(char * const *envp) {
26 int fd = open("/usr/bin/printf", O_EXEC);
27 if (fd < 0) {
28 perror("open");
29 return 1;
30 }
31
32 pid_t pid = fork();
33 if (pid == -1) {
34 perror("fork");
35 return 1;
36 } else if (pid > 0) {
37 /* parent */
38 } else {
39 char *argv[] = {"printf", "PASSED\n", NULL};
40
41 if (fexecve(fd, argv, envp) < 0) {
42 perror("fexecve");
43 _exit(1);
44 }
45
46 }
47
48 wait(NULL);
49 return 0;
50 }
51
main(int argc,const char * argv[],char * const * envp)52 int main(int argc, const char *argv[], char * const *envp) {
53 /* First exercise the syscall with some invalid input. */
54 test_EFAULT();
55 test_EBADF();
56
57 return test_fexecve(envp);
58 }
59