937a200089
This is actually a fully functional build except: * All internal shared libraries are static linked to make sure there is no interference with ports (and to reduce build time). * It does not have the python/perl/etc plugin or API support. * By default, it installs as "svnlite" rather than "svn". * If WITH_SVN added in make.conf, you get "svn". * If WITHOUT_SVNLITE is in make.conf, this is completely disabled. To be absolutely clear, this is not intended for any use other than checking out freebsd source and committing, like we once did with cvs. It should be usable for small scale local repositories that don't need the python/perl plugin architecture.
121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "apr_arch_file_io.h"
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#if APR_HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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APR_DECLARE(apr_status_t) apr_file_lock(apr_file_t *thefile, int type)
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{
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int rc;
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#if defined(HAVE_FCNTL_H)
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{
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struct flock l = { 0 };
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int fc;
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l.l_whence = SEEK_SET; /* lock from current point */
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l.l_start = 0; /* begin lock at this offset */
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l.l_len = 0; /* lock to end of file */
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if ((type & APR_FLOCK_TYPEMASK) == APR_FLOCK_SHARED)
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l.l_type = F_RDLCK;
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else
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l.l_type = F_WRLCK;
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fc = (type & APR_FLOCK_NONBLOCK) ? F_SETLK : F_SETLKW;
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/* keep trying if fcntl() gets interrupted (by a signal) */
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while ((rc = fcntl(thefile->filedes, fc, &l)) < 0 && errno == EINTR)
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continue;
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if (rc == -1) {
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/* on some Unix boxes (e.g., Tru64), we get EACCES instead
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* of EAGAIN; we don't want APR_STATUS_IS_EAGAIN() matching EACCES
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* since that breaks other things, so fix up the retcode here
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*/
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if (errno == EACCES) {
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return EAGAIN;
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}
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return errno;
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}
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}
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#elif defined(HAVE_SYS_FILE_H)
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{
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int ltype;
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if ((type & APR_FLOCK_TYPEMASK) == APR_FLOCK_SHARED)
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ltype = LOCK_SH;
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else
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ltype = LOCK_EX;
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if ((type & APR_FLOCK_NONBLOCK) != 0)
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ltype |= LOCK_NB;
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/* keep trying if flock() gets interrupted (by a signal) */
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while ((rc = flock(thefile->filedes, ltype)) < 0 && errno == EINTR)
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continue;
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if (rc == -1)
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return errno;
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}
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#else
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#error No file locking mechanism is available.
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#endif
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_file_unlock(apr_file_t *thefile)
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{
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int rc;
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#if defined(HAVE_FCNTL_H)
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{
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struct flock l = { 0 };
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l.l_whence = SEEK_SET; /* lock from current point */
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l.l_start = 0; /* begin lock at this offset */
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l.l_len = 0; /* lock to end of file */
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l.l_type = F_UNLCK;
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/* keep trying if fcntl() gets interrupted (by a signal) */
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while ((rc = fcntl(thefile->filedes, F_SETLKW, &l)) < 0
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&& errno == EINTR)
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continue;
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if (rc == -1)
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return errno;
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}
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#elif defined(HAVE_SYS_FILE_H)
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{
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/* keep trying if flock() gets interrupted (by a signal) */
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while ((rc = flock(thefile->filedes, LOCK_UN)) < 0 && errno == EINTR)
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continue;
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if (rc == -1)
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return errno;
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}
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#else
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#error No file locking mechanism is available.
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#endif
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return APR_SUCCESS;
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}
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