minor fixes to return codes of closedir, telldir

1 files changed, 132 insertions, 0 deletions

diff --git a/tests/dirent/test_readdir.c b/tests/dirent/test_readdir.c
new file mode 100644
index 00000000..9f7b12e8
--- /dev/null
+++ b/tests/dirent/test_readdir.c
@@ -0,0 +1,132 @@
+#include <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+static void create_file(const char *path, const char *buffer, int mode) {
+  int fd = open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
+  assert(fd >= 0);
+
+  int err = write(fd, buffer, sizeof(char) * strlen(buffer));
+  assert(err ==  (sizeof(char) * strlen(buffer)));
+
+  close(fd);
+}
+
+void setup() {
+  mkdir("nocanread", 0111);
+  mkdir("foobar", 0777);
+  create_file("foobar/file.txt", "ride into the danger zone", 0666);
+}
+
+void cleanup() {
+  rmdir("nocanread");
+  unlink("foobar/file.txt");
+  rmdir("foobar");
+}
+
+void test() {
+  int err;
+  int loc;
+  DIR *dir;
+  struct dirent *ent;
+  struct dirent ent_r;
+  struct dirent *result;
+
+  // check bad opendir input
+  dir = opendir("noexist");
+  assert(!dir);
+  assert(errno == ENOENT);
+  dir = opendir("nocanread");
+  assert(!dir);
+  assert(errno == EACCES);
+  dir = opendir("foobar/file.txt");
+  assert(!dir);
+  assert(errno == ENOTDIR);
+
+  // check bad readdir input
+  dir = opendir("foobar");
+  closedir(dir);
+  ent = readdir(dir);
+  assert(!ent);
+  assert(errno == EBADF);
+
+  // check bad readdir_r input
+  dir = opendir("foobar");
+  closedir(dir);
+  err = readdir_r(dir, NULL, &result);
+  assert(err == EBADF);
+  
+  //
+  // do a normal read with readdir
+  //
+  dir = opendir("foobar");
+  assert(dir);
+  ent = readdir(dir);
+  assert(!strcmp(ent->d_name, "."));
+  assert(ent->d_type & DT_DIR);
+  ent = readdir(dir);
+  assert(!strcmp(ent->d_name, ".."));
+  assert(ent->d_type & DT_DIR);
+  ent = readdir(dir);
+  assert(!strcmp(ent->d_name, "file.txt"));
+  assert(ent->d_type & DT_REG);
+  ent = readdir(dir);
+  assert(!ent);
+
+  // test rewinddir
+  rewinddir(dir);
+  ent = readdir(dir);
+  assert(!strcmp(ent->d_name, "."));
+
+  // test seek / tell
+  rewinddir(dir);
+  ent = readdir(dir);
+  assert(!strcmp(ent->d_name, "."));
+  loc = telldir(dir);
+  ent = readdir(dir);
+  assert(!strcmp(ent->d_name, ".."));
+  ent = readdir(dir);
+  assert(!strcmp(ent->d_name, "file.txt"));
+  seekdir(dir, loc);
+  ent = readdir(dir);
+  assert(!strcmp(ent->d_name, ".."));
+
+  //
+  // do a normal read with readdir_r
+  //
+  rewinddir(dir);
+  err = readdir_r(dir, &ent_r, &result);
+  assert(!err);
+  assert(&ent_r == result);
+  assert(!strcmp(ent_r.d_name, "."));
+  err = readdir_r(dir, &ent_r, &result);
+  assert(!err);
+  assert(&ent_r == result);
+  assert(!strcmp(ent_r.d_name, ".."));
+  err = readdir_r(dir, &ent_r, &result);
+  assert(!err);
+  assert(&ent_r == result);
+  assert(!strcmp(ent_r.d_name, "file.txt"));
+  err = readdir_r(dir, &ent_r, &result);
+  assert(!err);
+  assert(!result);
+
+  err = closedir(dir);
+  assert(!err);
+
+  puts("success");
+}
+
+int main() {
+  atexit(cleanup);
+  signal(SIGABRT, cleanup);
+  setup();
+  test();
+  return EXIT_SUCCESS;
+}
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