2018-11-21 19:41:05 +08:00
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/* Test POSIX lock on an open file (lockf).
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2021-01-03 03:32:25 +08:00
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Copyright (C) 2019-2021 Free Software Foundation, Inc.
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2018-11-21 19:41:05 +08:00
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
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along with this program; if not, see <https://www.gnu.org/licenses/>.
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2018-11-21 19:41:05 +08:00
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*/
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#include <unistd.h>
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#include <stdint.h>
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#include <errno.h>
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#include <stdio.h>
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#include <support/temp_file.h>
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#include <support/capture_subprocess.h>
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#include <support/check.h>
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static char *temp_filename;
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static int temp_fd;
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static void
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do_prepare (int argc, char **argv)
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{
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temp_fd = create_temp_file ("tst-lockfd.", &temp_filename);
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TEST_VERIFY_EXIT (temp_fd != -1);
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}
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#define PREPARE do_prepare
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static void
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do_test_child_lockf (void *closure)
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{
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/* Check if parent has [0, 1024) locked. */
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TEST_COMPARE (lseek (temp_fd, 0, SEEK_SET), 0);
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TEST_COMPARE (lockf (temp_fd, F_TLOCK, 1024), -1);
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TEST_COMPARE (errno, EAGAIN);
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TEST_COMPARE (lockf (temp_fd, F_TEST, 1024), -1);
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TEST_COMPARE (errno, EACCES);
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/* Also Check if parent has last 1024 bytes locked. */
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TEST_COMPARE (lseek (temp_fd, INT32_MAX-1024, SEEK_SET), INT32_MAX-1024);
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TEST_COMPARE (lockf (temp_fd, F_TEST, 1024), -1);
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/* And try to lock [1024, 2048). */
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TEST_COMPARE (lseek (temp_fd, 1024, SEEK_SET), 1024);
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TEST_COMPARE (lockf (temp_fd, F_LOCK, 1024), 0);
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/* Check if non-LFS interface cap access to 32-bif off_t. */
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TEST_COMPARE (lseek64 (temp_fd, (off64_t)INT32_MAX, SEEK_SET),
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(off64_t)INT32_MAX);
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TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), 0);
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}
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static void
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do_test_child_lockf64 (void *closure)
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{
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/* Check if parent has [0, 1024) locked. */
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TEST_COMPARE (lseek64 (temp_fd, 0, SEEK_SET), 0);
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TEST_COMPARE (lockf64 (temp_fd, F_TLOCK, 1024), -1);
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TEST_COMPARE (errno, EAGAIN);
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TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), -1);
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TEST_COMPARE (errno, EACCES);
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/* Also Check if parent has last 1024 bytes locked. */
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TEST_COMPARE (lseek64 (temp_fd, INT32_MAX-1024, SEEK_SET), INT32_MAX-1024);
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TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), -1);
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/* And try to lock [1024, 2048). */
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TEST_COMPARE (lseek64 (temp_fd, 1024, SEEK_SET), 1024);
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TEST_COMPARE (lockf64 (temp_fd, F_LOCK, 1024), 0);
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/* And also [INT32_MAX, INT32_MAX+1024). */
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{
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off64_t off = (off64_t)INT32_MAX;
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TEST_COMPARE (lseek64 (temp_fd, off, SEEK_SET), off);
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TEST_COMPARE (lockf64 (temp_fd, F_LOCK, 1024), 0);
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}
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/* Check if [INT32_MAX+1024, INT64_MAX) is locked. */
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{
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off64_t off = (off64_t)INT32_MAX+1024;
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TEST_COMPARE (lseek64 (temp_fd, off, SEEK_SET), off);
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TEST_COMPARE (lockf64 (temp_fd, F_TLOCK, 1024), -1);
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TEST_COMPARE (errno, EAGAIN);
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TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), -1);
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TEST_COMPARE (errno, EACCES);
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}
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}
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static int
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do_test (void)
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{
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/* Basic tests to check if a lock can be obtained and checked. */
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TEST_COMPARE (lockf (temp_fd, F_LOCK, 1024), 0);
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TEST_COMPARE (lockf (temp_fd, F_LOCK, INT32_MAX), 0);
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TEST_COMPARE (lockf (temp_fd, F_TLOCK, 1024), 0);
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TEST_COMPARE (lockf (temp_fd, F_TEST, 1024), 0);
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TEST_COMPARE (lseek (temp_fd, 1024, SEEK_SET), 1024);
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TEST_COMPARE (lockf (temp_fd, F_ULOCK, 1024), 0);
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/* Parent process should have ([0, 1024), [2048, INT32_MAX)) ranges locked. */
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{
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struct support_capture_subprocess result;
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result = support_capture_subprocess (do_test_child_lockf, NULL);
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support_capture_subprocess_check (&result, "lockf", 0, sc_allow_none);
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}
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if (sizeof (off_t) != sizeof (off64_t))
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{
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/* Check if previously locked regions with LFS symbol. */
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TEST_COMPARE (lseek (temp_fd, 0, SEEK_SET), 0);
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TEST_COMPARE (lockf64 (temp_fd, F_LOCK, 1024), 0);
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TEST_COMPARE (lockf64 (temp_fd, F_TLOCK, 1024), 0);
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TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), 0);
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/* Lock region [INT32_MAX+1024, INT64_MAX). */
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off64_t off = (off64_t)INT32_MAX + 1024;
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TEST_COMPARE (lseek64 (temp_fd, off, SEEK_SET), off);
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TEST_COMPARE (lockf64 (temp_fd, F_LOCK, 1024), 0);
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/* Parent process should have ([0, 1024), [2048, INT32_MAX),
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[INT32_MAX+1024, INT64_MAX)) ranges locked. */
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{
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struct support_capture_subprocess result;
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result = support_capture_subprocess (do_test_child_lockf64, NULL);
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support_capture_subprocess_check (&result, "lockf", 0, sc_allow_none);
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}
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}
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return 0;
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}
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#include <support/test-driver.c>
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