| 1 | #include <unistd.h> |
| 2 | #include <fcntl.h> |
| 3 | #include "syscall.h" |
| 4 | |
| 5 | ssize_t readlink(const char *restrict path, char *restrict buf, size_t bufsize) |
| 6 | { |
| 7 | char dummy[1]; |
| 8 | if (!bufsize) { |
| 9 | buf = dummy; |
| 10 | bufsize = 1; |
| 11 | } |
| 12 | #ifdef SYS_readlink |
| 13 | int r = __syscall(SYS_readlink, path, buf, bufsize); |
| 14 | #else |
| 15 | int r = __syscall(SYS_readlinkat, AT_FDCWD, path, buf, bufsize); |
| 16 | #endif |
| 17 | if (buf == dummy && r > 0) r = 0; |
| 18 | return __syscall_ret(r); |
| 19 | } |