/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/calls/calls.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/asan.internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/nt/ipc.h"
#include "libc/sysv/consts/at.h"
#include "libc/sysv/consts/s.h"
#include "libc/sysv/errfuns.h"

#define NT_PIPE_PATH_PREFIX u"\\\\.\\pipe\\"

/**
 * Creates named pipe.
 *
 * @param mode is octal, e.g. 0600 for owner-only read/write
 * @asyncsignalsafe
 */
int mkfifo(const char *pathname, unsigned mode) {
  // TODO(jart): Windows?
  int e, rc;
  if (IsAsan() && !__asan_is_valid_str(pathname)) {
    rc = efault();
  } else {
    e = errno;
    rc = sys_mkfifo(pathname, mode);
    if (rc == -1 && rc == ENOSYS) {
      errno = e;
      rc = sys_mknod(pathname, mode | S_IFIFO, 0);
      if (rc == -1 && rc == ENOSYS) {
        errno = e;
        rc = sys_mknodat(AT_FDCWD, pathname, mode | S_IFIFO, 0);
      }
    }
  }
  STRACE("mkfifo(%#s, %#o) â %d% m", pathname, mode, rc);
  return rc;
}
