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/*
clsync - file tree sync utility based on inotify/kqueue/bsm/gio
Copyright (C) 2013-2014 Dmitry Yu Okunev <dyokunev@ut.mephi.ru> 0x8E30679C
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef __FreeBSD__
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#define __POSIX_HACKS_C
int reserved_fd[FOPEN_MAX + 1] = { -1};
int reserved_fd_used;
static inline int reserve_fdpair ( int idx )
{
int pipe_fds[2];
if ( pipe2 ( pipe_fds, O_CLOEXEC | O_NONBLOCK ) )
return errno;
reserved_fd[ idx ] = pipe_fds[0];
reserved_fd[ idx + 1 ] = pipe_fds[1];
return 0;
}
int posixhacks_init()
{
int i;
// Reserving file descriptors from start to bypass FOPEN_MAX limit on fopen()/fdopen()
i = 0;
while ( i < ( FOPEN_MAX + 1 ) / 2 ) {
if ( reserve_fdpair ( i << 1 ) )
return errno;
i++;
}
reserved_fd_used = 0;
return 0;
}
FILE *posixhacks_fopen ( const char *path, const char *mode )
{
close ( reserved_fd[reserved_fd_used++] );
return fopen ( path, mode );
}
int posixhacks_fclose ( FILE *fp )
{
int rc;
int pipe_fds[2];
rc = fclose ( fp );
// reserving the file descriptor
if ( ! ( reserved_fd_used & 1 ) )
close ( reserved_fd[reserved_fd_used++] );
reserved_fd_used -= 2;
if ( reserve_fdpair ( reserved_fd_used ) )
return errno;
return rc;
}
int posixhacks_deinit()
{
int i;
i = 0;
while ( i < ( FOPEN_MAX + 1 ) / 2 ) {
close ( reserved_fd[ ( i << 1 ) ] );
close ( reserved_fd[ ( i << 1 ) + 1 ] );
i++;
}
return 0;
}
#endif
extern int make_iso_compilers_happy; // anti-warning
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