/* Test that failing system calls do set errno to the correct value.

   Copyright (C) 2017-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <limits.h>

#include <grp.h>

#include <fcntl.h>

#include <stdio.h>

#include <string.h>

#include <sys/ioctl.h>

#include <sys/socket.h>

#include <sys/stat.h>

#include <sys/time.h>

#include <sys/resource.h>

#include <sys/types.h>

#include <sys/statfs.h>

#include <sys/mman.h>

#include <sys/uio.h>

#include <unistd.h>

#include <netinet/in.h>

/* This is not an exhaustive test: only system calls that can be

   persuaded to fail with a consistent error code and no side effects

   are included.  Usually these are failures due to invalid arguments,

   with errno code EBADF or EINVAL.  The order of argument checks is

   unspecified, so we must take care to provide arguments that only

   allow _one_ failure mode.

   Note that all system calls that can fail with EFAULT are permitted

   to deliver a SIGSEGV signal instead, so we avoid supplying invalid

   pointers in general, and we do not attempt to test system calls

   that can only fail with EFAULT (e.g. gettimeofday, gethostname).

   Also note that root-only system calls (e.g. acct, reboot) may, when

   the test is run as an unprivileged user, fail due to insufficient

   privileges before bothering to do argument checks, so those are not

   tested either.

   Also, system calls that take enum or a set of flags as argument is

   not tested if POSIX doesn't specify exact binary values for all

   flags, and so any value passed to flags may become valid.

   Some tests assume "/bin/sh" names a file that exists and is not a

   directory.  */

#define test_wrp_rv(rtype, prtype, experr, syscall, ...)	\

  (__extension__ ({						\

    errno = 0xdead;						\

    rtype ret = syscall (__VA_ARGS__);				\

    int err = errno;						\

    int fail;							\

    if (ret == (rtype) -1 && err == experr)			\

      fail = 0;							\

    else							\

      {								\

        fail = 1;						\

        if (ret != (rtype) -1)					\

          printf ("FAIL: " #syscall ": didn't fail as expected"	\

               " (return "prtype")\n", ret);			\

        else if (err == 0xdead)					\

          puts("FAIL: " #syscall ": didn't update errno\n");	\

        else if (err != experr)					\

          printf ("FAIL: " #syscall				\

               ": errno is: %d (%s) expected: %d (%s)\n",	\

               err, strerror (err), experr, strerror (experr));	\

      }								\

    fail;							\

  }))

#define test_wrp(experr, syscall, ...)				\

  test_wrp_rv(int, "%d", experr, syscall, __VA_ARGS__)

static int

do_test (void)

{

  size_t pagesize = sysconf (_SC_PAGESIZE);

  struct statfs sfs;

  struct sockaddr sa;

  socklen_t sl;

  char buf[1];

  struct iovec iov[1] = { { buf, 1 } };

  struct sockaddr_in sin;

  sin.sin_family = AF_INET;

  sin.sin_port = htons (1026);

  sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK);

  struct msghdr msg;

  memset(&msg, 0, sizeof msg);

  msg.msg_iov = iov;

  msg.msg_iovlen = 1;

  int fails = 0;

  fails |= test_wrp (EBADF, accept, -1, &sa, &sl);

  fails |= test_wrp (EINVAL, access, "/", -1);

  fails |= test_wrp (EBADF, bind, -1, (struct sockaddr *)&sin, sizeof sin);

  fails |= test_wrp (ENOTDIR, chdir, "/bin/sh");

  fails |= test_wrp (EBADF, close, -1);

  fails |= test_wrp (EBADF, connect, -1, (struct sockaddr *)&sin, sizeof sin);

  fails |= test_wrp (EBADF, dup, -1);

  fails |= test_wrp (EBADF, dup2, -1, -1);

  fails |= test_wrp (EBADF, fchdir, -1);

  fails |= test_wrp (EBADF, fchmod, -1, 0);

  fails |= test_wrp (EBADF, fcntl, -1, 0);

  fails |= test_wrp (EBADF, fstatfs, -1, &sfs;;

  fails |= test_wrp (EBADF, fsync, -1);

  fails |= test_wrp (EBADF, ftruncate, -1, 0);

  fails |= test_wrp (EINVAL, getgroups, -1, 0);

  fails |= test_wrp (EBADF, getpeername, -1, &sa, &sl);

  fails |= test_wrp (EBADF, getsockname, -1, &sa, &sl);

  fails |= test_wrp (EBADF, getsockopt, -1, 0, 0, buf, &sl);

  fails |= test_wrp (EBADF, ioctl, -1, TIOCNOTTY);

  fails |= test_wrp (EBADF, listen, -1, 1);

  fails |= test_wrp (EBADF, lseek, -1, 0, 0);

  fails |= test_wrp (EINVAL, madvise, (void *) -1, -1, 0);

  fails |= test_wrp_rv (void *, "%p", EBADF,

                        mmap, 0, pagesize, PROT_READ, MAP_PRIVATE, -1, 0);

  fails |= test_wrp (EINVAL, mprotect, (void *) -1, pagesize, -1);

  fails |= test_wrp (EINVAL, msync, (void *) -1, pagesize, -1);

  fails |= test_wrp (EINVAL, munmap, (void *) -1, 0);

  fails |= test_wrp (EISDIR, open, "/bin", EISDIR, O_WRONLY);

  fails |= test_wrp (EBADF, read, -1, buf, 1);

  fails |= test_wrp (EINVAL, readlink, "/", buf, -1);

  fails |= test_wrp (EBADF, readv, -1, iov, 1);

  fails |= test_wrp (EBADF, recv, -1, buf, 1, 0);

  fails |= test_wrp (EBADF, recvfrom, -1, buf, 1, 0, &sa, &sl);

  fails |= test_wrp (EBADF, recvmsg, -1, &msg, 0);

  fails |= test_wrp (EINVAL, select, -1, 0, 0, 0, 0);

  fails |= test_wrp (EBADF, send, -1, buf, 1, 0);

  fails |= test_wrp (EBADF, sendmsg, -1, &msg, 0);

  fails |= test_wrp (EBADF, sendto, -1, buf, 1, 0, &sa, sl);

  fails |= test_wrp (EBADF, setsockopt, -1, 0, 0, buf, sizeof (*buf));

  fails |= test_wrp (EBADF, shutdown, -1, SHUT_RD);

  fails |= test_wrp (EBADF, write, -1, "Hello", sizeof ("Hello") );

  fails |= test_wrp (EBADF, writev, -1, iov, 1 );

  return fails;

}

#include "support/test-driver.c"