| 1 | #include <unistd.h> |
| 2 | #include <errno.h> |
| 3 | #include <string.h> |
| 4 | #include "lock.h" |
| 5 | |
| 6 | char *__wasilibc_cwd = "/"; |
| 7 | |
| 8 | #ifdef _REENTRANT |
| 9 | static volatile int lock[1]; |
| 10 | void __wasilibc_cwd_lock(void) { LOCK(lock); } |
| 11 | void __wasilibc_cwd_unlock(void) { UNLOCK(lock); } |
| 12 | #else |
| 13 | #define __wasilibc_cwd_lock() (void)0 |
| 14 | #define __wasilibc_cwd_unlock() (void)0 |
| 15 | #endif |
| 16 | |
| 17 | char *getcwd(char *buf, size_t size) |
| 18 | { |
| 19 | __wasilibc_cwd_lock(); |
| 20 | if (!buf) { |
| 21 | buf = strdup(__wasilibc_cwd); |
| 22 | if (!buf) { |
| 23 | errno = ENOMEM; |
| 24 | __wasilibc_cwd_unlock(); |
| 25 | return NULL; |
| 26 | } |
| 27 | } else { |
| 28 | size_t len = strlen(__wasilibc_cwd); |
| 29 | if (size < len + 1) { |
| 30 | errno = ERANGE; |
| 31 | __wasilibc_cwd_unlock(); |
| 32 | return NULL; |
| 33 | } |
| 34 | strcpy(buf, __wasilibc_cwd); |
| 35 | } |
| 36 | __wasilibc_cwd_unlock(); |
| 37 | return buf; |
| 38 | } |
| 39 | |