| #ifdef HAVE_CONFIG_H |
| # include "config.h" |
| #endif |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <sys/syscall.h> |
| |
| int |
| main(void) |
| { |
| #if defined(__NR_getuid) \ |
| && defined(__NR_setuid) \ |
| && defined(__NR_getresuid) \ |
| && defined(__NR_setreuid) \ |
| && defined(__NR_setresuid) \ |
| && defined(__NR_fchown) \ |
| && defined(__NR_getgroups) |
| int uid; |
| int size; |
| int *list = 0; |
| |
| uid = syscall(__NR_getuid); |
| assert(syscall(__NR_setuid, uid) == 0); |
| { |
| /* |
| * uids returned by getresuid should be ignored |
| * to avoid 16bit vs 32bit issues. |
| */ |
| int r, e, s; |
| assert(syscall(__NR_getresuid, &r, &e, &s) == 0); |
| } |
| assert(syscall(__NR_setreuid, -1, -1L) == 0); |
| assert(syscall(__NR_setresuid, uid, -1, -1L) == 0); |
| assert(syscall(__NR_fchown, 1, -1, -1L) == 0); |
| assert((size = syscall(__NR_getgroups, 0, list)) >= 0); |
| assert(list = calloc(size + 1, sizeof(*list))); |
| assert(syscall(__NR_getgroups, size, list) == size); |
| return 0; |
| #else |
| return 77; |
| #endif |
| } |