/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et 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/calls/struct/stat.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/kprintf.h"
#include "libc/log/check.h"
#include "libc/nt/runtime.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/f.h"
#include "libc/sysv/consts/fd.h"
#include "libc/sysv/consts/o.h"
#include "libc/testlib/testlib.h"
#include "libc/x/xspawn.h"

__static_yoink("zipos");
__static_yoink("libc/testlib/hyperion.txt");

void SetUpOnce(void) {
  testlib_enable_tmp_setup_teardown();
}

__attribute__((__constructor__)) static textstartup void TestInit(int argc,
                                                                  char **argv) {
  int fd;
  if (argc == 2 && !strcmp(argv[1], "boop")) {
    if ((fd = open("/dev/null", O_RDWR | O_CLOEXEC)) == 3) {
      _exit(72);
    } else {
      _exit(fd + 1);
    }
  }
}

TEST(dup, ebadf) {
  ASSERT_SYS(EBADF, -1, dup(-1));
  ASSERT_SYS(EBADF, -1, dup2(-1, 0));
  ASSERT_SYS(EBADF, -1, dup2(0, -1));
  ASSERT_SYS(EBADF, -1, dup3(0, -1, 0));
  ASSERT_SYS(EBADF, -1, dup3(10, 0, 0));
}

TEST(dup, sameNumber) {
  ASSERT_SYS(0, 0, dup2(0, 0));
  ASSERT_SYS(EINVAL, -1, dup3(0, 0, 0));
  EXPECT_SYS(EBADF, -1, dup2(-1, -1));
  EXPECT_SYS(EINVAL, -1, dup3(-1, -1, 0));
  ASSERT_SYS(EBADF, -1, dup2(3, 3));
  ASSERT_SYS(EBADF, -1, dup2(0, -1));
}

TEST(dup, bigNumber) {
  ASSERT_SYS(0, 100, dup2(0, 100));
  ASSERT_SYS(0, 0, close(100));
}

TEST(dup2, ziposdest) {
  ASSERT_SYS(0, 3, creat("real", 0644));
  ASSERT_SYS(0, 4, open("/zip/libc/testlib/hyperion.txt", O_RDONLY));
  ASSERT_SYS(0, 2, write(3, "hi", 2));
  ASSERT_SYS(EBADF, -1, write(4, "hi", 2));
  ASSERT_SYS(0, 4, dup2(3, 4));
  ASSERT_SYS(0, 2, write(4, "hi", 2));
  ASSERT_SYS(0, 0, close(4));
  ASSERT_SYS(0, 0, close(3));
}

TEST(dup2, zipossrc) {
  char b[8];
  ASSERT_SYS(0, 3, open("/zip/libc/testlib/hyperion.txt", O_RDONLY));
  ASSERT_SYS(0, 4, dup2(3, 4));
  ASSERT_SYS(0, 8, read(4, b, 8));
  ASSERT_SYS(0, 0, close(4));
  ASSERT_SYS(0, 0, close(3));
}

#ifdef __x86_64__
TEST(dup, clearsCloexecFlag) {
  static bool once;
  int ws;
  ASSERT_FALSE(once);
  once = true;
  ASSERT_SYS(0, 0, close(creat("file", 0644)));
  ASSERT_SYS(0, 3, open("file", O_RDWR | O_CLOEXEC));
  ASSERT_NE(-1, (ws = xspawn(0)));
  if (ws == -2) {
    dup2(3, 0);
    execv(GetProgramExecutableName(),
          (char *const[]){GetProgramExecutableName(), "boop", 0});
    _exit(127);
  }
  ASSERT_EQ(72 << 8, ws);
  ASSERT_SYS(0, 0, close(3));
}
#endif