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/* Test that failing system calls do set errno to the correct value.
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Copyright (C) 2017-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <limits.h>
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#include <grp.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/types.h>
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#include <sys/statfs.h>
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#include <sys/mman.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include <netinet/in.h>
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/* This is not an exhaustive test: only system calls that can be
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persuaded to fail with a consistent error code and no side effects
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are included. Usually these are failures due to invalid arguments,
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with errno code EBADF or EINVAL. The order of argument checks is
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unspecified, so we must take care to provide arguments that only
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allow _one_ failure mode.
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Note that all system calls that can fail with EFAULT are permitted
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to deliver a SIGSEGV signal instead, so we avoid supplying invalid
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pointers in general, and we do not attempt to test system calls
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that can only fail with EFAULT (e.g. gettimeofday, gethostname).
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Also note that root-only system calls (e.g. acct, reboot) may, when
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the test is run as an unprivileged user, fail due to insufficient
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privileges before bothering to do argument checks, so those are not
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tested either.
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Also, system calls that take enum or a set of flags as argument is
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not tested if POSIX doesn't specify exact binary values for all
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flags, and so any value passed to flags may become valid.
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Some tests assume "/bin/sh" names a file that exists and is not a
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directory. */
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#define test_wrp_rv(rtype, prtype, experr, syscall, ...) \
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(__extension__ ({ \
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errno = 0xdead; \
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rtype ret = syscall (__VA_ARGS__); \
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int err = errno; \
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int fail; \
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if (ret == (rtype) -1 && err == experr) \
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fail = 0; \
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else \
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{ \
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fail = 1; \
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if (ret != (rtype) -1) \
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printf ("FAIL: " #syscall ": didn't fail as expected" \
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" (return "prtype")\n", ret); \
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else if (err == 0xdead) \
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puts("FAIL: " #syscall ": didn't update errno\n"); \
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else if (err != experr) \
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printf ("FAIL: " #syscall \
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": errno is: %d (%s) expected: %d (%s)\n", \
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err, strerror (err), experr, strerror (experr)); \
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} \
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fail; \
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}))
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#define test_wrp(experr, syscall, ...) \
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test_wrp_rv(int, "%d", experr, syscall, __VA_ARGS__)
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static int
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do_test (void)
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{
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size_t pagesize = sysconf (_SC_PAGESIZE);
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struct statfs sfs;
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struct sockaddr sa;
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socklen_t sl;
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char buf[1];
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struct iovec iov[1] = { { buf, 1 } };
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struct sockaddr_in sin;
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sin.sin_family = AF_INET;
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sin.sin_port = htons (1026);
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sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
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struct msghdr msg;
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memset(&msg, 0, sizeof msg);
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msg.msg_iov = iov;
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msg.msg_iovlen = 1;
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int fails = 0;
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fails |= test_wrp (EBADF, accept, -1, &sa, &sl);
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fails |= test_wrp (EINVAL, access, "/", -1);
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fails |= test_wrp (EBADF, bind, -1, (struct sockaddr *)&sin, sizeof sin);
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fails |= test_wrp (ENOTDIR, chdir, "/bin/sh");
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fails |= test_wrp (EBADF, close, -1);
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fails |= test_wrp (EBADF, connect, -1, (struct sockaddr *)&sin, sizeof sin);
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fails |= test_wrp (EBADF, dup, -1);
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fails |= test_wrp (EBADF, dup2, -1, -1);
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fails |= test_wrp (EBADF, fchdir, -1);
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fails |= test_wrp (EBADF, fchmod, -1, 0);
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fails |= test_wrp (EBADF, fcntl, -1, 0);
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fails |= test_wrp (EBADF, fstatfs, -1, &sfs;;
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fails |= test_wrp (EBADF, fsync, -1);
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fails |= test_wrp (EBADF, ftruncate, -1, 0);
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fails |= test_wrp (EINVAL, getgroups, -1, 0);
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fails |= test_wrp (EBADF, getpeername, -1, &sa, &sl);
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fails |= test_wrp (EBADF, getsockname, -1, &sa, &sl);
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fails |= test_wrp (EBADF, getsockopt, -1, 0, 0, buf, &sl);
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fails |= test_wrp (EBADF, ioctl, -1, TIOCNOTTY);
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fails |= test_wrp (EBADF, listen, -1, 1);
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fails |= test_wrp (EBADF, lseek, -1, 0, 0);
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fails |= test_wrp (EINVAL, madvise, (void *) -1, -1, 0);
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fails |= test_wrp_rv (void *, "%p", EBADF,
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mmap, 0, pagesize, PROT_READ, MAP_PRIVATE, -1, 0);
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fails |= test_wrp (EINVAL, mprotect, (void *) -1, pagesize, -1);
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fails |= test_wrp (EINVAL, msync, (void *) -1, pagesize, -1);
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fails |= test_wrp (EINVAL, munmap, (void *) -1, 0);
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fails |= test_wrp (EISDIR, open, "/bin", EISDIR, O_WRONLY);
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fails |= test_wrp (EBADF, read, -1, buf, 1);
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fails |= test_wrp (EINVAL, readlink, "/", buf, -1);
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fails |= test_wrp (EBADF, readv, -1, iov, 1);
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fails |= test_wrp (EBADF, recv, -1, buf, 1, 0);
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fails |= test_wrp (EBADF, recvfrom, -1, buf, 1, 0, &sa, &sl);
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fails |= test_wrp (EBADF, recvmsg, -1, &msg, 0);
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fails |= test_wrp (EINVAL, select, -1, 0, 0, 0, 0);
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fails |= test_wrp (EBADF, send, -1, buf, 1, 0);
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fails |= test_wrp (EBADF, sendmsg, -1, &msg, 0);
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fails |= test_wrp (EBADF, sendto, -1, buf, 1, 0, &sa, sl);
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fails |= test_wrp (EBADF, setsockopt, -1, 0, 0, buf, sizeof (*buf));
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fails |= test_wrp (EBADF, shutdown, -1, SHUT_RD);
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fails |= test_wrp (EBADF, write, -1, "Hello", sizeof ("Hello") );
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fails |= test_wrp (EBADF, writev, -1, iov, 1 );
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return fails;
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}
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#include "support/test-driver.c"
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