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/*
* Copyright (c) 1999-2005, 2007 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* 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>
#include <sys/time.h>
#ifdef HAVE_FLOCK
# include <sys/file.h>
#endif /* HAVE_FLOCK */
#include <stdio.h>
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif /* HAVE_STRING_H */
#include <ctype.h>
#include <limits.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <fcntl.h>
#if TIME_WITH_SYS_TIME
# include <time.h>
#endif
#ifndef HAVE_TIMESPEC
# include <emul/timespec.h>
#endif
#include "sudo.h"
#ifndef LINE_MAX
# define LINE_MAX 2048
#endif
#ifndef lint
__unused static const char rcsid[] = "$Sudo: fileops.c,v 1.16 2008/11/09 14:13:12 millert Exp $";
#endif /* lint */
/*
* Update the access and modify times on an fd or file.
*/
int
touch(fd, path, tsp)
int fd;
char *path;
struct timespec *tsp;
{
struct timeval times[2];
if (tsp != NULL) {
times[0].tv_sec = times[1].tv_sec = tsp->tv_sec;
times[0].tv_usec = times[1].tv_usec = tsp->tv_nsec / 1000;
}
#if defined(HAVE_FUTIME) || defined(HAVE_FUTIMES)
if (fd != -1)
return(futimes(fd, tsp ? times : NULL));
else
#endif
if (path != NULL)
return(utimes(path, tsp ? times : NULL));
else
return(-1);
}
/*
* 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
/*
* Read a line of input, remove comments and strip off leading
* and trailing spaces. Returns static storage that is reused.
*/
char *
sudo_parseln(fp)
FILE *fp;
{
size_t len;
char *cp = NULL;
static char buf[LINE_MAX];
if (fgets(buf, sizeof(buf), fp) != NULL) {
/* Remove comments */
if ((cp = strchr(buf, '#')) != NULL)
*cp = '\0';
/* Trim leading and trailing whitespace/newline */
len = strlen(buf);
while (len > 0 && isspace(buf[len - 1]))
buf[--len] = '\0';
for (cp = buf; isblank(*cp); cp++)
continue;
}
return(cp);
}
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