/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/fmt/fmt.h"
#include "libc/log/check.h"
#include "libc/runtime/runtime.h"
#include "libc/sysv/consts/o.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"

char testlib_enable_tmp_setup_teardown;

void SetUpOnce(void) {
  pledge("stdio rpath wpath cpath fattr proc", 0);
  errno = 0;
}

TEST(lseek, wat) {
  int fd, pid;
  char buf[8] = {0};
  ASSERT_NE(-1, (fd = open("wut", O_RDWR | O_CREAT, 0644)));
  ASSERT_EQ(3, write(fd, "wut", 3));
  ASSERT_NE(-1, lseek(fd, 0, SEEK_SET));
  if (!(pid = fork())) {
    lseek(fd, 1, SEEK_SET);
    _exit(0);
  }
  EXPECT_NE(-1, waitpid(pid, 0, 0));
  EXPECT_EQ(1, read(fd, buf, 1));
  EXPECT_EQ('u', buf[0]); /* wat?! */
  EXPECT_NE(-1, close(fd));
}