fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
607 lines
13 KiB
C
607 lines
13 KiB
C
/*-
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* Copyright (c) 1992 Keith Muller.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego.
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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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* 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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* 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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)sel_subs.c 8.1 (Berkeley) 5/31/93";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <pwd.h>
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#include <grp.h>
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#include <stdio.h>
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#include <string.h>
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#include <strings.h>
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#include <stdlib.h>
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#include "pax.h"
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#include "sel_subs.h"
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#include "extern.h"
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static int str_sec(char *, time_t *);
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static int usr_match(ARCHD *);
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static int grp_match(ARCHD *);
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static int trng_match(ARCHD *);
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static TIME_RNG *trhead = NULL; /* time range list head */
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static TIME_RNG *trtail = NULL; /* time range list tail */
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static USRT **usrtb = NULL; /* user selection table */
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static GRPT **grptb = NULL; /* group selection table */
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/*
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* Routines for selection of archive members
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*/
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/*
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* sel_chk()
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* check if this file matches a specified uid, gid or time range
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* Return:
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* 0 if this archive member should be processed, 1 if it should be skipped
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*/
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int
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sel_chk(ARCHD *arcn)
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{
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if (((usrtb != NULL) && usr_match(arcn)) ||
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((grptb != NULL) && grp_match(arcn)) ||
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((trhead != NULL) && trng_match(arcn)))
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return(1);
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return(0);
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}
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/*
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* User/group selection routines
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*
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* Routines to handle user selection of files based on the file uid/gid. To
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* add an entry, the user supplies either then name or the uid/gid starting with
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* a # on the command line. A \# will escape the #.
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*/
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/*
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* usr_add()
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* add a user match to the user match hash table
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* Return:
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* 0 if added ok, -1 otherwise;
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*/
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int
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usr_add(char *str)
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{
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u_int indx;
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USRT *pt;
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struct passwd *pw;
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uid_t uid;
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/*
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* create the table if it doesn't exist
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*/
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if ((str == NULL) || (*str == '\0'))
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return(-1);
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if ((usrtb == NULL) &&
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((usrtb = (USRT **)calloc(USR_TB_SZ, sizeof(USRT *))) == NULL)) {
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paxwarn(1, "Unable to allocate memory for user selection table");
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return(-1);
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}
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/*
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* figure out user spec
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*/
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if (str[0] != '#') {
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/*
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* it is a user name, \# escapes # as first char in user name
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*/
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if ((str[0] == '\\') && (str[1] == '#'))
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++str;
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if ((pw = getpwnam(str)) == NULL) {
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paxwarn(1, "Unable to find uid for user: %s", str);
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return(-1);
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}
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uid = (uid_t)pw->pw_uid;
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} else
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# ifdef NET2_STAT
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uid = (uid_t)atoi(str+1);
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# else
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uid = (uid_t)strtoul(str+1, NULL, 10);
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# endif
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endpwent();
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/*
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* hash it and go down the hash chain (if any) looking for it
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*/
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indx = ((unsigned)uid) % USR_TB_SZ;
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if ((pt = usrtb[indx]) != NULL) {
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while (pt != NULL) {
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if (pt->uid == uid)
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return(0);
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pt = pt->fow;
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}
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}
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/*
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* uid is not yet in the table, add it to the front of the chain
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*/
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if ((pt = (USRT *)malloc(sizeof(USRT))) != NULL) {
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pt->uid = uid;
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pt->fow = usrtb[indx];
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usrtb[indx] = pt;
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return(0);
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}
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paxwarn(1, "User selection table out of memory");
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return(-1);
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}
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/*
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* usr_match()
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* check if this files uid matches a selected uid.
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* Return:
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* 0 if this archive member should be processed, 1 if it should be skipped
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*/
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static int
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usr_match(ARCHD *arcn)
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{
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USRT *pt;
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/*
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* hash and look for it in the table
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*/
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pt = usrtb[((unsigned)arcn->sb.st_uid) % USR_TB_SZ];
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while (pt != NULL) {
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if (pt->uid == arcn->sb.st_uid)
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return(0);
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pt = pt->fow;
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}
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/*
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* not found
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*/
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return(1);
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}
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/*
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* grp_add()
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* add a group match to the group match hash table
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* Return:
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* 0 if added ok, -1 otherwise;
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*/
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int
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grp_add(char *str)
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{
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u_int indx;
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GRPT *pt;
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struct group *gr;
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gid_t gid;
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/*
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* create the table if it doesn't exist
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*/
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if ((str == NULL) || (*str == '\0'))
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return(-1);
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if ((grptb == NULL) &&
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((grptb = (GRPT **)calloc(GRP_TB_SZ, sizeof(GRPT *))) == NULL)) {
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paxwarn(1, "Unable to allocate memory fo group selection table");
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return(-1);
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}
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/*
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* figure out user spec
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*/
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if (str[0] != '#') {
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/*
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* it is a group name, \# escapes # as first char in group name
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*/
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if ((str[0] == '\\') && (str[1] == '#'))
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++str;
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if ((gr = getgrnam(str)) == NULL) {
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paxwarn(1,"Cannot determine gid for group name: %s", str);
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return(-1);
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}
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gid = gr->gr_gid;
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} else
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# ifdef NET2_STAT
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gid = (gid_t)atoi(str+1);
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# else
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gid = (gid_t)strtoul(str+1, NULL, 10);
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# endif
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endgrent();
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/*
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* hash it and go down the hash chain (if any) looking for it
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*/
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indx = ((unsigned)gid) % GRP_TB_SZ;
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if ((pt = grptb[indx]) != NULL) {
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while (pt != NULL) {
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if (pt->gid == gid)
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return(0);
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pt = pt->fow;
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}
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}
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/*
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* gid not in the table, add it to the front of the chain
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*/
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if ((pt = (GRPT *)malloc(sizeof(GRPT))) != NULL) {
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pt->gid = gid;
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pt->fow = grptb[indx];
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grptb[indx] = pt;
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return(0);
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}
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paxwarn(1, "Group selection table out of memory");
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return(-1);
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}
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/*
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* grp_match()
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* check if this files gid matches a selected gid.
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* Return:
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* 0 if this archive member should be processed, 1 if it should be skipped
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*/
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static int
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grp_match(ARCHD *arcn)
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{
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GRPT *pt;
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/*
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* hash and look for it in the table
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*/
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pt = grptb[((unsigned)arcn->sb.st_gid) % GRP_TB_SZ];
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while (pt != NULL) {
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if (pt->gid == arcn->sb.st_gid)
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return(0);
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pt = pt->fow;
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}
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/*
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* not found
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*/
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return(1);
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}
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/*
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* Time range selection routines
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*
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* Routines to handle user selection of files based on the modification and/or
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* inode change time falling within a specified time range (the non-standard
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* -T flag). The user may specify any number of different file time ranges.
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* Time ranges are checked one at a time until a match is found (if at all).
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* If the file has a mtime (and/or ctime) which lies within one of the time
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* ranges, the file is selected. Time ranges may have a lower and/or an upper
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* value. These ranges are inclusive. When no time ranges are supplied to pax
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* with the -T option, all members in the archive will be selected by the time
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* range routines. When only a lower range is supplied, only files with a
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* mtime (and/or ctime) equal to or younger are selected. When only an upper
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* range is supplied, only files with a mtime (and/or ctime) equal to or older
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* are selected. When the lower time range is equal to the upper time range,
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* only files with a mtime (or ctime) of exactly that time are selected.
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*/
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/*
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* trng_add()
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* add a time range match to the time range list.
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* This is a non-standard pax option. Lower and upper ranges are in the
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* format: [yy[mm[dd[hh]]]]mm[.ss] and are comma separated.
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* Time ranges are based on current time, so 1234 would specify a time of
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* 12:34 today.
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* Return:
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* 0 if the time range was added to the list, -1 otherwise
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*/
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int
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trng_add(char *str)
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{
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TIME_RNG *pt;
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char *up_pt = NULL;
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char *stpt;
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char *flgpt;
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int dot = 0;
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/*
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* throw out the badly formed time ranges
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*/
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if ((str == NULL) || (*str == '\0')) {
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paxwarn(1, "Empty time range string");
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return(-1);
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}
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/*
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* locate optional flags suffix /{cm}.
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*/
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if ((flgpt = strrchr(str, '/')) != NULL)
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*flgpt++ = '\0';
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for (stpt = str; *stpt != '\0'; ++stpt) {
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if ((*stpt >= '0') && (*stpt <= '9'))
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continue;
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if ((*stpt == ',') && (up_pt == NULL)) {
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*stpt = '\0';
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up_pt = stpt + 1;
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dot = 0;
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continue;
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}
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/*
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* allow only one dot per range (secs)
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*/
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if ((*stpt == '.') && (!dot)) {
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++dot;
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continue;
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}
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paxwarn(1, "Improperly specified time range: %s", str);
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goto out;
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}
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/*
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* allocate space for the time range and store the limits
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*/
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if ((pt = (TIME_RNG *)malloc(sizeof(TIME_RNG))) == NULL) {
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paxwarn(1, "Unable to allocate memory for time range");
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return(-1);
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}
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/*
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* by default we only will check file mtime, but the user can specify
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* mtime, ctime (inode change time) or both.
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*/
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if ((flgpt == NULL) || (*flgpt == '\0'))
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pt->flgs = CMPMTME;
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else {
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pt->flgs = 0;
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while (*flgpt != '\0') {
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switch(*flgpt) {
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case 'M':
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case 'm':
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pt->flgs |= CMPMTME;
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break;
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case 'C':
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case 'c':
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pt->flgs |= CMPCTME;
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break;
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default:
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paxwarn(1, "Bad option %c with time range %s",
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*flgpt, str);
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free(pt);
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goto out;
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}
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++flgpt;
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}
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}
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/*
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* start off with the current time
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*/
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pt->low_time = pt->high_time = time(NULL);
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if (*str != '\0') {
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/*
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* add lower limit
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*/
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if (str_sec(str, &(pt->low_time)) < 0) {
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paxwarn(1, "Illegal lower time range %s", str);
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free(pt);
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goto out;
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}
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pt->flgs |= HASLOW;
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}
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if ((up_pt != NULL) && (*up_pt != '\0')) {
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/*
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* add upper limit
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*/
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if (str_sec(up_pt, &(pt->high_time)) < 0) {
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paxwarn(1, "Illegal upper time range %s", up_pt);
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free(pt);
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goto out;
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}
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pt->flgs |= HASHIGH;
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/*
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* check that the upper and lower do not overlap
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*/
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if (pt->flgs & HASLOW) {
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if (pt->low_time > pt->high_time) {
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paxwarn(1, "Upper %s and lower %s time overlap",
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up_pt, str);
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free(pt);
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return(-1);
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}
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}
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}
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pt->fow = NULL;
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if (trhead == NULL) {
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trtail = trhead = pt;
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return(0);
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}
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trtail->fow = pt;
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trtail = pt;
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return(0);
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out:
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paxwarn(1, "Time range format is: [yy[mm[dd[hh]]]]mm[.ss][/[c][m]]");
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return(-1);
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}
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/*
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* trng_match()
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* check if this files mtime/ctime falls within any supplied time range.
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* Return:
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* 0 if this archive member should be processed, 1 if it should be skipped
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*/
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static int
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trng_match(ARCHD *arcn)
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{
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TIME_RNG *pt;
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/*
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* have to search down the list one at a time looking for a match.
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* remember time range limits are inclusive.
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*/
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pt = trhead;
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while (pt != NULL) {
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switch(pt->flgs & CMPBOTH) {
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case CMPBOTH:
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/*
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* user wants both mtime and ctime checked for this
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* time range
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*/
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if (((pt->flgs & HASLOW) &&
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(arcn->sb.st_mtime < pt->low_time) &&
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(arcn->sb.st_ctime < pt->low_time)) ||
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((pt->flgs & HASHIGH) &&
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(arcn->sb.st_mtime > pt->high_time) &&
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(arcn->sb.st_ctime > pt->high_time))) {
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pt = pt->fow;
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continue;
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}
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break;
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case CMPCTME:
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/*
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* user wants only ctime checked for this time range
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*/
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if (((pt->flgs & HASLOW) &&
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(arcn->sb.st_ctime < pt->low_time)) ||
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((pt->flgs & HASHIGH) &&
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(arcn->sb.st_ctime > pt->high_time))) {
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pt = pt->fow;
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continue;
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}
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break;
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case CMPMTME:
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default:
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/*
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* user wants only mtime checked for this time range
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*/
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if (((pt->flgs & HASLOW) &&
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(arcn->sb.st_mtime < pt->low_time)) ||
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((pt->flgs & HASHIGH) &&
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(arcn->sb.st_mtime > pt->high_time))) {
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pt = pt->fow;
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continue;
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}
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break;
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}
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break;
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}
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if (pt == NULL)
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return(1);
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return(0);
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}
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/*
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* str_sec()
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* Convert a time string in the format of [yy[mm[dd[hh]]]]mm[.ss] to gmt
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* seconds. Tval already has current time loaded into it at entry.
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* Return:
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* 0 if converted ok, -1 otherwise
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*/
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static int
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str_sec(char *str, time_t *tval)
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{
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struct tm *lt;
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char *dot = NULL;
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lt = localtime(tval);
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if ((dot = strchr(str, '.')) != NULL) {
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/*
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* seconds (.ss)
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*/
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*dot++ = '\0';
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if (strlen(dot) != 2)
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return(-1);
|
|
if ((lt->tm_sec = ATOI2(dot)) > 61)
|
|
return(-1);
|
|
} else
|
|
lt->tm_sec = 0;
|
|
|
|
switch (strlen(str)) {
|
|
case 10:
|
|
/*
|
|
* year (yy)
|
|
* watch out for year 2000
|
|
*/
|
|
if ((lt->tm_year = ATOI2(str)) < 69)
|
|
lt->tm_year += 100;
|
|
str += 2;
|
|
/* FALLTHROUGH */
|
|
case 8:
|
|
/*
|
|
* month (mm)
|
|
* watch out months are from 0 - 11 internally
|
|
*/
|
|
if ((lt->tm_mon = ATOI2(str)) > 12)
|
|
return(-1);
|
|
--lt->tm_mon;
|
|
str += 2;
|
|
/* FALLTHROUGH */
|
|
case 6:
|
|
/*
|
|
* day (dd)
|
|
*/
|
|
if ((lt->tm_mday = ATOI2(str)) > 31)
|
|
return(-1);
|
|
str += 2;
|
|
/* FALLTHROUGH */
|
|
case 4:
|
|
/*
|
|
* hour (hh)
|
|
*/
|
|
if ((lt->tm_hour = ATOI2(str)) > 23)
|
|
return(-1);
|
|
str += 2;
|
|
/* FALLTHROUGH */
|
|
case 2:
|
|
/*
|
|
* minute (mm)
|
|
*/
|
|
if ((lt->tm_min = ATOI2(str)) > 59)
|
|
return(-1);
|
|
break;
|
|
default:
|
|
return(-1);
|
|
}
|
|
/*
|
|
* convert broken-down time to GMT clock time seconds
|
|
*/
|
|
if ((*tval = mktime(lt)) == -1)
|
|
return(-1);
|
|
return(0);
|
|
}
|