/* * Copyright (c) 1999, 2001 Todd C. Miller <Todd.Miller@courtesan.com> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 4. Products derived from this software may not be called "Sudo" nor * may "Sudo" appear in their names without specific prior written * permission from the author. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Sponsored in part by the Defense Advanced Research Projects * Agency (DARPA) and Air Force Research Laboratory, Air Force * Materiel Command, USAF, under agreement number F39502-99-1-0512. */ #include "config.h" #include <sys/types.h> #include <sys/param.h> #ifdef HAVE_FLOCK # include <sys/file.h> #endif /* HAVE_FLOCK */ #include <stdio.h> #ifdef HAVE_UNISTD_H # include <unistd.h> #endif /* HAVE_UNISTD_H */ #include <fcntl.h> #include <time.h> #ifdef HAVE_UTIME # ifdef HAVE_UTIME_H # include <utime.h> # endif /* HAVE_UTIME_H */ #else # include "emul/utime.h" #endif /* HAVE_UTIME */ #include "sudo.h" #ifndef lint static const char rcsid[] = "$Sudo: fileops.c,v 1.4 2003/04/16 00:42:10 millert Exp $"; #endif /* lint */ /* * Update the access and modify times on a file. */ int touch(path, when) char *path; time_t when; { #ifdef HAVE_UTIME_POSIX struct utimbuf ut, *utp; ut.actime = ut.modtime = when; utp = &ut; #else /* BSD <= 4.3 has no struct utimbuf */ time_t utp[2]; utp[0] = utp[1] = when; #endif /* HAVE_UTIME_POSIX */ return(utime(path, utp)); } /* * Lock/unlock a file. */ #ifdef HAVE_LOCKF int lock_file(fd, lockit) int fd; int lockit; { int op = 0; switch (lockit) { case SUDO_LOCK: op = F_LOCK; break; case SUDO_TLOCK: op = F_TLOCK; break; case SUDO_UNLOCK: op = F_ULOCK; break; } return(lockf(fd, op, 0) == 0); } #elif HAVE_FLOCK int lock_file(fd, lockit) int fd; int lockit; { int op = 0; switch (lockit) { case SUDO_LOCK: op = LOCK_EX; break; case SUDO_TLOCK: op = LOCK_EX | LOCK_NB; break; case SUDO_UNLOCK: op = LOCK_UN; break; } return(flock(fd, op) == 0); } #else int lock_file(fd, lockit) int fd; int lockit; { #ifdef F_SETLK int func; struct flock lock; lock.l_start = 0; lock.l_len = 0; lock.l_pid = getpid(); lock.l_type = (lockit == SUDO_UNLOCK) ? F_UNLCK : F_WRLCK; lock.l_whence = SEEK_SET; func = (lockit == SUDO_TLOCK) ? F_SETLK : F_SETLKW; return(fcntl(fd, func, &lock) == 0); #else return(TRUE); #endif } #endif