157 lines
3.7 KiB
C
157 lines
3.7 KiB
C
/*
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* Copyright (c) 1999, 2001 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* 4. Products derived from this software may not be called "Sudo" nor
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* may "Sudo" appear in their names without specific prior written
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* permission from the author.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#ifdef HAVE_FLOCK
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# include <sys/file.h>
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#endif /* HAVE_FLOCK */
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include <fcntl.h>
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#include <time.h>
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#ifdef HAVE_UTIME
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# ifdef HAVE_UTIME_H
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# include <utime.h>
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# endif /* HAVE_UTIME_H */
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#else
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# include "emul/utime.h"
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#endif /* HAVE_UTIME */
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#include "sudo.h"
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#ifndef lint
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static const char rcsid[] = "$Sudo$";
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#endif /* lint */
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/*
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* Update the access and modify times on a file.
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*/
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int
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touch(path, when)
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char *path;
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time_t when;
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{
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#ifdef HAVE_UTIME_POSIX
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struct utimbuf ut, *utp;
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ut.actime = ut.modtime = when;
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utp = &ut;
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#else
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/* BSD <= 4.3 has no struct utimbuf */
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time_t utp[2];
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utp[0] = utp[1] = when;
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#endif /* HAVE_UTIME_POSIX */
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return(utime(path, utp));
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}
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/*
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* Lock/unlock a file.
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*/
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#ifdef HAVE_LOCKF
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int
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lock_file(fd, lockit)
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int fd;
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int lockit;
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{
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int op = 0;
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switch (lockit) {
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case SUDO_LOCK:
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op = F_LOCK;
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break;
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case SUDO_TLOCK:
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op = F_TLOCK;
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break;
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case SUDO_UNLOCK:
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op = F_ULOCK;
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break;
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}
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return(lockf(fd, op, 0) == 0);
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}
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#elif HAVE_FLOCK
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int
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lock_file(fd, lockit)
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int fd;
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int lockit;
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{
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int op = 0;
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switch (lockit) {
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case SUDO_LOCK:
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op = LOCK_EX;
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break;
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case SUDO_TLOCK:
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op = LOCK_EX | LOCK_NB;
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break;
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case SUDO_UNLOCK:
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op = LOCK_UN;
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break;
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}
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return(flock(fd, op) == 0);
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}
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#else
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int
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lock_file(fd, lockit)
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int fd;
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int lockit;
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{
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#ifdef F_SETLK
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int func;
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struct flock lock;
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lock.l_start = 0;
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lock.l_len = 0;
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lock.l_pid = getpid();
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lock.l_type = (lockit == SUDO_UNLOCK) ? F_UNLCK : F_WRLCK;
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lock.l_whence = SEEK_SET;
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func = (lockit == SUDO_TLOCK) ? F_SETLK : F_SETLKW;
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return(fcntl(fd, func, &lock) == 0);
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#else
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return(TRUE);
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#endif
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}
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#endif
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