30fe4a067c
Set adminstrative domain for the process when looking up user's
password or group info and when preparing for execve().
Include strings.h even if string.h exists since they may define
different things. Fixes warnings on AIX and others.
170 lines
3.7 KiB
C
170 lines
3.7 KiB
C
/*
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* Copyright (c) 1999-2005, 2007, 2009, 2010
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* Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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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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#include <sys/time.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_STRING_H
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#include <ctype.h>
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#include <limits.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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#if TIME_WITH_SYS_TIME
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# include <time.h>
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#endif
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#ifndef HAVE_TIMESPEC
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# include <emul/timespec.h>
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#endif
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#include <compat.h>
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#include <missing.h>
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#include <fileops.h>
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#ifndef LINE_MAX
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# define LINE_MAX 2048
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#endif
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/*
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* Update the access and modify times on an fd or file.
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*/
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int
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touch(int fd, char *path, struct timeval *tvp)
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{
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struct timeval times[2];
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if (tvp != NULL) {
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times[0].tv_sec = times[1].tv_sec = tvp->tv_sec;
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times[0].tv_usec = times[1].tv_usec = tvp->tv_usec;
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}
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#if defined(HAVE_FUTIME) || defined(HAVE_FUTIMES)
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if (fd != -1)
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return(futimes(fd, tvp ? times : NULL));
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else
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#endif
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if (path != NULL)
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return(utimes(path, tvp ? times : NULL));
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else
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return(-1);
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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(int fd, 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(int fd, 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(int fd, 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_LOCK) ? F_SETLKW : F_SETLK;
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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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/*
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* Read a line of input, remove comments and strip off leading
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* and trailing spaces. Returns static storage that is reused.
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*/
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char *
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sudo_parseln(FILE *fp)
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{
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size_t len;
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char *cp = NULL;
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static char buf[LINE_MAX];
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if (fgets(buf, sizeof(buf), fp) != NULL) {
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/* Remove comments */
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if ((cp = strchr(buf, '#')) != NULL)
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*cp = '\0';
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/* Trim leading and trailing whitespace/newline */
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len = strlen(buf);
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while (len > 0 && isspace((unsigned char)buf[len - 1]))
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buf[--len] = '\0';
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for (cp = buf; isblank(*cp); cp++)
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continue;
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}
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return(cp);
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}
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