libc-top-half/musl/src/unistd/readlinkat.c

   1 #include <unistd.h>
   2 #include "syscall.h"
   3
   4 ssize_t readlinkat(int fd, const char *restrict path, char *restrict buf, size_t bufsize)
   5 {
   6         char dummy[1];
   7         if (!bufsize) {
   8                 buf = dummy;
   9                 bufsize = 1;
  10         }
  11         int r = __syscall(SYS_readlinkat, fd, path, buf, bufsize);
  12         if (buf == dummy && r > 0) r = 0;
  13         return __syscall_ret(r);
  14 }