618 lines
14 KiB
C
618 lines
14 KiB
C
/* $NetBSD: sel_subs.c,v 1.24 2011/08/31 16:24:54 plunky Exp $ */
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/*-
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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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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if !defined(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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#else
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__RCSID("$NetBSD: sel_subs.c,v 1.24 2011/08/31 16:24:54 plunky Exp $");
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#endif
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#endif /* not lint */
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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 <sys/param.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 <ctype.h>
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#include <string.h>
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#include <strings.h>
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#include <time.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <tzfile.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(const 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 the 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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tty_warn(1,
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"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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tty_warn(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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uid = (uid_t)strtoul(str+1, NULL, 10);
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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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tty_warn(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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tty_warn(1,
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"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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tty_warn(1,
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"Cannot determine gid for group name: %s", str);
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return -1;
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}
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gid = (gid_t)gr->gr_gid;
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} else
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gid = (gid_t)strtoul(str+1, NULL, 10);
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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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tty_warn(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 a 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 a 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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tty_warn(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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tty_warn(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 = malloc(sizeof(TIME_RNG))) == NULL) {
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tty_warn(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 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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tty_warn(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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tty_warn(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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tty_warn(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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tty_warn(1,
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"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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tty_warn(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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#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
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static int
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str_sec(const char *p, time_t *tval)
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{
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struct tm *lt;
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const char *dot, *t;
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int yearset, len;
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|
for (t = p, dot = NULL; *t; ++t) {
|
|
if (isdigit((unsigned char)*t))
|
|
continue;
|
|
if (*t == '.' && dot == NULL) {
|
|
dot = t;
|
|
continue;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
lt = localtime(tval);
|
|
|
|
if (dot != NULL) {
|
|
len = strlen(dot);
|
|
if (len != 3)
|
|
return -1;
|
|
++dot;
|
|
lt->tm_sec = ATOI2(dot);
|
|
} else {
|
|
len = 0;
|
|
lt->tm_sec = 0;
|
|
}
|
|
|
|
yearset = 0;
|
|
switch (strlen(p) - len) {
|
|
case 12:
|
|
lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE;
|
|
yearset = 1;
|
|
/* FALLTHROUGH */
|
|
case 10:
|
|
if (yearset) {
|
|
lt->tm_year += ATOI2(p);
|
|
} else {
|
|
yearset = ATOI2(p);
|
|
if (yearset < 69)
|
|
lt->tm_year = yearset + 2000 - TM_YEAR_BASE;
|
|
else
|
|
lt->tm_year = yearset + 1900 - TM_YEAR_BASE;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case 8:
|
|
lt->tm_mon = ATOI2(p);
|
|
--lt->tm_mon;
|
|
/* FALLTHROUGH */
|
|
case 6:
|
|
lt->tm_mday = ATOI2(p);
|
|
/* FALLTHROUGH */
|
|
case 4:
|
|
lt->tm_hour = ATOI2(p);
|
|
/* FALLTHROUGH */
|
|
case 2:
|
|
lt->tm_min = ATOI2(p);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* convert broken-down time to GMT clock time seconds
|
|
*/
|
|
if ((*tval = mktime(lt)) == -1)
|
|
return -1;
|
|
return 0;
|
|
}
|