compiler-rt/test/sanitizer_common/TestCases/Posix/readlink.c

   1 // RUN: %clang -O0 %s -o %t && %run %t
   2
   3 #include <assert.h>
   4 #include <fcntl.h>
   5 #include <limits.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <sys/types.h>
   9 #include <unistd.h>
  10
  11 int main(int argc, char **argv) {
  12   char symlink_path[PATH_MAX];
  13   snprintf(symlink_path, sizeof(symlink_path), "%s_%d.symlink", argv[0],
  14            getpid());
  15   remove(symlink_path);
  16   int res = symlink(argv[0], symlink_path);
  17   assert(!res);
  18
  19   char readlink_path[PATH_MAX];
  20   ssize_t res2 = readlink(symlink_path, readlink_path, sizeof(readlink_path));
  21   assert(res2 >= 0);
  22   readlink_path[res2] = '\0';
  23   assert(!strcmp(readlink_path, argv[0]));
  24
  25   return 0;
  26 }