diff options
Diffstat (limited to 'src/unistd/readlink.c')
| -rw-r--r-- | src/unistd/readlink.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/unistd/readlink.c b/src/unistd/readlink.c index a152d524..32f4537f 100644 --- a/src/unistd/readlink.c +++ b/src/unistd/readlink.c @@ -4,9 +4,16 @@ ssize_t readlink(const char *restrict path, char *restrict buf, size_t bufsize) { + char dummy[1]; + if (!bufsize) { + buf = dummy; + bufsize = 1; + } #ifdef SYS_readlink - return syscall(SYS_readlink, path, buf, bufsize); + int r = __syscall(SYS_readlink, path, buf, bufsize); #else - return syscall(SYS_readlinkat, AT_FDCWD, path, buf, bufsize); + int r = __syscall(SYS_readlinkat, AT_FDCWD, path, buf, bufsize); #endif + if (buf == dummy && r > 0) r = 0; + return __syscall_ret(r); } |