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Diffstat (limited to 'posix/test-errno.c')
| -rw-r--r-- | posix/test-errno.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/posix/test-errno.c b/posix/test-errno.c new file mode 100644 index 0000000000..98df344911 --- /dev/null +++ b/posix/test-errno.c @@ -0,0 +1,153 @@ +/* Test that failing system calls do set errno to the correct value. + + Copyright (C) 2017 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 <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 (EINVAL, open, "/bin/sh", -1, 0); + 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, sl); + 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" |