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367787a3c6
Don't abuse arcname's constness.
1131 lines
28 KiB
C
1131 lines
28 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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* 4. 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[] = "@(#)pat_rep.c 8.2 (Berkeley) 4/18/94";
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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/stat.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#ifdef NET2_REGEX
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#include <regexp.h>
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#else
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#include <regex.h>
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#endif
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#include "pax.h"
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#include "pat_rep.h"
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#include "extern.h"
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/*
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* routines to handle pattern matching, name modification (regular expression
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* substitution and interactive renames), and destination name modification for
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* copy (-rw). Both file name and link names are adjusted as required in these
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* routines.
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*/
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#define MAXSUBEXP 10 /* max subexpressions, DO NOT CHANGE */
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static PATTERN *pathead = NULL; /* file pattern match list head */
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static PATTERN *pattail = NULL; /* file pattern match list tail */
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static REPLACE *rephead = NULL; /* replacement string list head */
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static REPLACE *reptail = NULL; /* replacement string list tail */
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static int rep_name(char *, int *, int);
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static int tty_rename(ARCHD *);
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static int fix_path(char *, int *, char *, int);
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static int fn_match(char *, char *, char **);
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static char * range_match(char *, int);
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#ifdef NET2_REGEX
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static int resub(regexp *, char *, char *, char *);
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#else
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static int resub(regex_t *, regmatch_t *, char *, char *, char *);
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#endif
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/*
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* rep_add()
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* parses the -s replacement string; compiles the regular expression
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* and stores the compiled value and it's replacement string together in
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* replacement string list. Input to this function is of the form:
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* /old/new/pg
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* The first char in the string specifies the delimiter used by this
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* replacement string. "Old" is a regular expression in "ed" format which
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* is compiled by regcomp() and is applied to filenames. "new" is the
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* substitution string; p and g are options flags for printing and global
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* replacement (over the single filename)
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* Return:
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* 0 if a proper replacement string and regular expression was added to
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* the list of replacement patterns; -1 otherwise.
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*/
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int
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rep_add(char *str)
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{
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char *pt1;
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char *pt2;
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REPLACE *rep;
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# ifndef NET2_REGEX
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int res;
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char rebuf[BUFSIZ];
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# endif
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/*
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* throw out the bad parameters
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*/
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if ((str == NULL) || (*str == '\0')) {
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paxwarn(1, "Empty replacement string");
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return(-1);
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}
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/*
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* first character in the string specifies what the delimiter is for
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* this expression
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*/
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if ((pt1 = strchr(str+1, *str)) == NULL) {
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paxwarn(1, "Invalid replacement string %s", str);
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return(-1);
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}
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/*
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* allocate space for the node that handles this replacement pattern
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* and split out the regular expression and try to compile it
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*/
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if ((rep = (REPLACE *)malloc(sizeof(REPLACE))) == NULL) {
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paxwarn(1, "Unable to allocate memory for replacement string");
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return(-1);
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}
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*pt1 = '\0';
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# ifdef NET2_REGEX
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if ((rep->rcmp = regcomp(str+1)) == NULL) {
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# else
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if ((res = regcomp(&(rep->rcmp), str+1, 0)) != 0) {
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regerror(res, &(rep->rcmp), rebuf, sizeof(rebuf));
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paxwarn(1, "%s while compiling regular expression %s", rebuf, str);
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# endif
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free(rep);
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return(-1);
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}
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/*
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* put the delimiter back in case we need an error message and
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* locate the delimiter at the end of the replacement string
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* we then point the node at the new substitution string
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*/
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*pt1++ = *str;
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if ((pt2 = strchr(pt1, *str)) == NULL) {
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# ifdef NET2_REGEX
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free(rep->rcmp);
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# else
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regfree(&rep->rcmp);
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# endif
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free(rep);
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paxwarn(1, "Invalid replacement string %s", str);
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return(-1);
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}
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*pt2 = '\0';
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rep->nstr = pt1;
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pt1 = pt2++;
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rep->flgs = 0;
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/*
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* set the options if any
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*/
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while (*pt2 != '\0') {
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switch(*pt2) {
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case 'g':
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case 'G':
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rep->flgs |= GLOB;
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break;
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case 'p':
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case 'P':
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rep->flgs |= PRNT;
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break;
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default:
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# ifdef NET2_REGEX
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free(rep->rcmp);
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# else
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regfree(&rep->rcmp);
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# endif
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free(rep);
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*pt1 = *str;
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paxwarn(1, "Invalid replacement string option %s", str);
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return(-1);
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}
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++pt2;
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}
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/*
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* all done, link it in at the end
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*/
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rep->fow = NULL;
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if (rephead == NULL) {
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reptail = rephead = rep;
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return(0);
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}
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reptail->fow = rep;
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reptail = rep;
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return(0);
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}
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/*
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* pat_add()
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* add a pattern match to the pattern match list. Pattern matches are used
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* to select which archive members are extracted. (They appear as
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* arguments to pax in the list and read modes). If no patterns are
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* supplied to pax, all members in the archive will be selected (and the
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* pattern match list is empty).
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* Return:
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* 0 if the pattern was added to the list, -1 otherwise
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*/
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int
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pat_add(char *str, char *chdnam)
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{
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PATTERN *pt;
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/*
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* throw out the junk
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*/
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if ((str == NULL) || (*str == '\0')) {
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paxwarn(1, "Empty pattern string");
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return(-1);
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}
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/*
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* allocate space for the pattern and store the pattern. the pattern is
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* part of argv so do not bother to copy it, just point at it. Add the
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* node to the end of the pattern list
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*/
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if ((pt = (PATTERN *)malloc(sizeof(PATTERN))) == NULL) {
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paxwarn(1, "Unable to allocate memory for pattern string");
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return(-1);
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}
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pt->pstr = str;
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pt->pend = NULL;
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pt->plen = strlen(str);
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pt->fow = NULL;
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pt->flgs = 0;
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pt->chdname = chdnam;
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if (pathead == NULL) {
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pattail = pathead = pt;
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return(0);
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}
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pattail->fow = pt;
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pattail = pt;
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return(0);
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}
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/*
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* pat_chk()
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* complain if any the user supplied pattern did not result in a match to
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* a selected archive member.
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*/
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void
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pat_chk(void)
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{
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PATTERN *pt;
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int wban = 0;
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/*
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* walk down the list checking the flags to make sure MTCH was set,
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* if not complain
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*/
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for (pt = pathead; pt != NULL; pt = pt->fow) {
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if (pt->flgs & MTCH)
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continue;
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if (!wban) {
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paxwarn(1, "WARNING! These patterns were not matched:");
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++wban;
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}
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(void)fprintf(stderr, "%s\n", pt->pstr);
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}
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}
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/*
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* pat_sel()
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* the archive member which matches a pattern was selected. Mark the
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* pattern as having selected an archive member. arcn->pat points at the
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* pattern that was matched. arcn->pat is set in pat_match()
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*
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* NOTE: When the -c option is used, we are called when there was no match
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* by pat_match() (that means we did match before the inverted sense of
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* the logic). Now this seems really strange at first, but with -c we
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* need to keep track of those patterns that cause an archive member to NOT
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* be selected (it found an archive member with a specified pattern)
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* Return:
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* 0 if the pattern pointed at by arcn->pat was tagged as creating a
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* match, -1 otherwise.
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*/
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int
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pat_sel(ARCHD *arcn)
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{
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PATTERN *pt;
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PATTERN **ppt;
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int len;
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/*
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* if no patterns just return
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*/
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if ((pathead == NULL) || ((pt = arcn->pat) == NULL))
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return(0);
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/*
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* when we are NOT limited to a single match per pattern mark the
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* pattern and return
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*/
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if (!nflag) {
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pt->flgs |= MTCH;
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return(0);
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}
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/*
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* we reach this point only when we allow a single selected match per
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* pattern, if the pattern matches a directory and we do not have -d
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* (dflag) we are done with this pattern. We may also be handed a file
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* in the subtree of a directory. in that case when we are operating
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* with -d, this pattern was already selected and we are done
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*/
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if (pt->flgs & DIR_MTCH)
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return(0);
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if (!dflag && ((pt->pend != NULL) || (arcn->type == PAX_DIR))) {
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/*
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* ok we matched a directory and we are allowing
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* subtree matches but because of the -n only its children will
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* match. This is tagged as a DIR_MTCH type.
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* WATCH IT, the code assumes that pt->pend points
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* into arcn->name and arcn->name has not been modified.
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* If not we will have a big mess. Yup this is another kludge
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*/
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/*
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* if this was a prefix match, remove trailing part of path
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* so we can copy it. Future matches will be exact prefix match
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*/
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if (pt->pend != NULL)
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*pt->pend = '\0';
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if ((pt->pstr = strdup(arcn->name)) == NULL) {
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paxwarn(1, "Pattern select out of memory");
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if (pt->pend != NULL)
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*pt->pend = '/';
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pt->pend = NULL;
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return(-1);
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}
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/*
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* put the trailing / back in the source string
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*/
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if (pt->pend != NULL) {
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*pt->pend = '/';
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pt->pend = NULL;
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}
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pt->plen = strlen(pt->pstr);
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/*
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* strip off any trailing /, this should really never happen
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*/
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len = pt->plen - 1;
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if (*(pt->pstr + len) == '/') {
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*(pt->pstr + len) = '\0';
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pt->plen = len;
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}
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pt->flgs = DIR_MTCH | MTCH;
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arcn->pat = pt;
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return(0);
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}
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/*
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* we are then done with this pattern, so we delete it from the list
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* because it can never be used for another match.
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* Seems kind of strange to do for a -c, but the pax spec is really
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* vague on the interaction of -c -n and -d. We assume that when -c
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* and the pattern rejects a member (i.e. it matched it) it is done.
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* In effect we place the order of the flags as having -c last.
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*/
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pt = pathead;
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ppt = &pathead;
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while ((pt != NULL) && (pt != arcn->pat)) {
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ppt = &(pt->fow);
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pt = pt->fow;
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}
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if (pt == NULL) {
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/*
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* should never happen....
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*/
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paxwarn(1, "Pattern list inconsistant");
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return(-1);
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}
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*ppt = pt->fow;
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free(pt);
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arcn->pat = NULL;
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return(0);
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}
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/*
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* pat_match()
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* see if this archive member matches any supplied pattern, if a match
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* is found, arcn->pat is set to point at the potential pattern. Later if
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* this archive member is "selected" we process and mark the pattern as
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* one which matched a selected archive member (see pat_sel())
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* Return:
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* 0 if this archive member should be processed, 1 if it should be
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* skipped and -1 if we are done with all patterns (and pax should quit
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* looking for more members)
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*/
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int
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pat_match(ARCHD *arcn)
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{
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PATTERN *pt;
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arcn->pat = NULL;
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/*
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* if there are no more patterns and we have -n (and not -c) we are
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* done. otherwise with no patterns to match, matches all
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*/
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if (pathead == NULL) {
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if (nflag && !cflag)
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return(-1);
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return(0);
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}
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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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*/
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pt = pathead;
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while (pt != NULL) {
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/*
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* check for a file name match unless we have DIR_MTCH set in
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* this pattern then we want a prefix match
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*/
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if (pt->flgs & DIR_MTCH) {
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/*
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* this pattern was matched before to a directory
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* as we must have -n set for this (but not -d). We can
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* only match CHILDREN of that directory so we must use
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* an exact prefix match (no wildcards).
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*/
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if ((arcn->name[pt->plen] == '/') &&
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(strncmp(pt->pstr, arcn->name, pt->plen) == 0))
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break;
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} else if (fn_match(pt->pstr, arcn->name, &pt->pend) == 0)
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break;
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pt = pt->fow;
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}
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/*
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* return the result, remember that cflag (-c) inverts the sense of a
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* match
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*/
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if (pt == NULL)
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return(cflag ? 0 : 1);
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/*
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* We had a match, now when we invert the sense (-c) we reject this
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* member. However we have to tag the pattern a being successful, (in a
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* match, not in selecting an archive member) so we call pat_sel() here.
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*/
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arcn->pat = pt;
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if (!cflag)
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return(0);
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if (pat_sel(arcn) < 0)
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return(-1);
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arcn->pat = NULL;
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return(1);
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}
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|
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/*
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* fn_match()
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* Return:
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* 0 if this archive member should be processed, 1 if it should be
|
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* skipped and -1 if we are done with all patterns (and pax should quit
|
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* looking for more members)
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* Note: *pend may be changed to show where the prefix ends.
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*/
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static int
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fn_match(char *pattern, char *string, char **pend)
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{
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char c;
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char test;
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*pend = NULL;
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for (;;) {
|
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switch (c = *pattern++) {
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case '\0':
|
|
/*
|
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* Ok we found an exact match
|
|
*/
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if (*string == '\0')
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return(0);
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/*
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* Check if it is a prefix match
|
|
*/
|
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if ((dflag == 1) || (*string != '/'))
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return(-1);
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/*
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* It is a prefix match, remember where the trailing
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* / is located
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*/
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*pend = string;
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return(0);
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case '?':
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if ((test = *string++) == '\0')
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return (-1);
|
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break;
|
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case '*':
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c = *pattern;
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/*
|
|
* Collapse multiple *'s.
|
|
*/
|
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while (c == '*')
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c = *++pattern;
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|
|
|
/*
|
|
* Optimized hack for pattern with a * at the end
|
|
*/
|
|
if (c == '\0')
|
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return (0);
|
|
|
|
/*
|
|
* General case, use recursion.
|
|
*/
|
|
while ((test = *string) != '\0') {
|
|
if (!fn_match(pattern, string, pend))
|
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return (0);
|
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++string;
|
|
}
|
|
return (-1);
|
|
case '[':
|
|
/*
|
|
* range match
|
|
*/
|
|
if (((test = *string++) == '\0') ||
|
|
((pattern = range_match(pattern, test)) == NULL))
|
|
return (-1);
|
|
break;
|
|
case '\\':
|
|
default:
|
|
if (c != *string++)
|
|
return (-1);
|
|
break;
|
|
}
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static char *
|
|
range_match(char *pattern, int test)
|
|
{
|
|
char c;
|
|
char c2;
|
|
int negate;
|
|
int ok = 0;
|
|
|
|
if ((negate = (*pattern == '!')) != 0)
|
|
++pattern;
|
|
|
|
while ((c = *pattern++) != ']') {
|
|
/*
|
|
* Illegal pattern
|
|
*/
|
|
if (c == '\0')
|
|
return (NULL);
|
|
|
|
if ((*pattern == '-') && ((c2 = pattern[1]) != '\0') &&
|
|
(c2 != ']')) {
|
|
if ((c <= test) && (test <= c2))
|
|
ok = 1;
|
|
pattern += 2;
|
|
} else if (c == test)
|
|
ok = 1;
|
|
}
|
|
return (ok == negate ? NULL : pattern);
|
|
}
|
|
|
|
/*
|
|
* mod_name()
|
|
* modify a selected file name. first attempt to apply replacement string
|
|
* expressions, then apply interactive file rename. We apply replacement
|
|
* string expressions to both filenames and file links (if we didn't the
|
|
* links would point to the wrong place, and we could never be able to
|
|
* move an archive that has a file link in it). When we rename files
|
|
* interactively, we store that mapping (old name to user input name) so
|
|
* if we spot any file links to the old file name in the future, we will
|
|
* know exactly how to fix the file link.
|
|
* Return:
|
|
* 0 continue to process file, 1 skip this file, -1 pax is finished
|
|
*/
|
|
|
|
int
|
|
mod_name(ARCHD *arcn)
|
|
{
|
|
int res = 0;
|
|
|
|
/*
|
|
* Strip off leading '/' if appropriate.
|
|
* Currently, this option is only set for the tar format.
|
|
*/
|
|
if (rmleadslash && arcn->name[0] == '/') {
|
|
if (arcn->name[1] == '\0') {
|
|
arcn->name[0] = '.';
|
|
} else {
|
|
(void)memmove(arcn->name, &arcn->name[1],
|
|
strlen(arcn->name));
|
|
arcn->nlen--;
|
|
}
|
|
if (rmleadslash < 2) {
|
|
rmleadslash = 2;
|
|
paxwarn(0, "Removing leading / from absolute path names in the archive");
|
|
}
|
|
}
|
|
if (rmleadslash && arcn->ln_name[0] == '/' &&
|
|
(arcn->type == PAX_HLK || arcn->type == PAX_HRG)) {
|
|
if (arcn->ln_name[1] == '\0') {
|
|
arcn->ln_name[0] = '.';
|
|
} else {
|
|
(void)memmove(arcn->ln_name, &arcn->ln_name[1],
|
|
strlen(arcn->ln_name));
|
|
arcn->ln_nlen--;
|
|
}
|
|
if (rmleadslash < 2) {
|
|
rmleadslash = 2;
|
|
paxwarn(0, "Removing leading / from absolute path names in the archive");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* IMPORTANT: We have a problem. what do we do with symlinks?
|
|
* Modifying a hard link name makes sense, as we know the file it
|
|
* points at should have been seen already in the archive (and if it
|
|
* wasn't seen because of a read error or a bad archive, we lose
|
|
* anyway). But there are no such requirements for symlinks. On one
|
|
* hand the symlink that refers to a file in the archive will have to
|
|
* be modified to so it will still work at its new location in the
|
|
* file system. On the other hand a symlink that points elsewhere (and
|
|
* should continue to do so) should not be modified. There is clearly
|
|
* no perfect solution here. So we handle them like hardlinks. Clearly
|
|
* a replacement made by the interactive rename mapping is very likely
|
|
* to be correct since it applies to a single file and is an exact
|
|
* match. The regular expression replacements are a little harder to
|
|
* justify though. We claim that the symlink name is only likely
|
|
* to be replaced when it points within the file tree being moved and
|
|
* in that case it should be modified. what we really need to do is to
|
|
* call an oracle here. :)
|
|
*/
|
|
if (rephead != NULL) {
|
|
/*
|
|
* we have replacement strings, modify the name and the link
|
|
* name if any.
|
|
*/
|
|
if ((res = rep_name(arcn->name, &(arcn->nlen), 1)) != 0)
|
|
return(res);
|
|
|
|
if (((arcn->type == PAX_SLK) || (arcn->type == PAX_HLK) ||
|
|
(arcn->type == PAX_HRG)) &&
|
|
((res = rep_name(arcn->ln_name, &(arcn->ln_nlen), 0)) != 0))
|
|
return(res);
|
|
}
|
|
|
|
if (iflag) {
|
|
/*
|
|
* perform interactive file rename, then map the link if any
|
|
*/
|
|
if ((res = tty_rename(arcn)) != 0)
|
|
return(res);
|
|
if ((arcn->type == PAX_SLK) || (arcn->type == PAX_HLK) ||
|
|
(arcn->type == PAX_HRG))
|
|
sub_name(arcn->ln_name, &(arcn->ln_nlen), sizeof(arcn->ln_name));
|
|
}
|
|
return(res);
|
|
}
|
|
|
|
/*
|
|
* tty_rename()
|
|
* Prompt the user for a replacement file name. A "." keeps the old name,
|
|
* a empty line skips the file, and an EOF on reading the tty, will cause
|
|
* pax to stop processing and exit. Otherwise the file name input, replaces
|
|
* the old one.
|
|
* Return:
|
|
* 0 process this file, 1 skip this file, -1 we need to exit pax
|
|
*/
|
|
|
|
static int
|
|
tty_rename(ARCHD *arcn)
|
|
{
|
|
char tmpname[PAXPATHLEN+2];
|
|
int res;
|
|
|
|
/*
|
|
* prompt user for the replacement name for a file, keep trying until
|
|
* we get some reasonable input. Archives may have more than one file
|
|
* on them with the same name (from updates etc). We print verbose info
|
|
* on the file so the user knows what is up.
|
|
*/
|
|
tty_prnt("\nATTENTION: %s interactive file rename operation.\n", argv0);
|
|
|
|
for (;;) {
|
|
ls_tty(arcn);
|
|
tty_prnt("Input new name, or a \".\" to keep the old name, ");
|
|
tty_prnt("or a \"return\" to skip this file.\n");
|
|
tty_prnt("Input > ");
|
|
if (tty_read(tmpname, sizeof(tmpname)) < 0)
|
|
return(-1);
|
|
if (strcmp(tmpname, "..") == 0) {
|
|
tty_prnt("Try again, illegal file name: ..\n");
|
|
continue;
|
|
}
|
|
if (strlen(tmpname) > PAXPATHLEN) {
|
|
tty_prnt("Try again, file name too long\n");
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* empty file name, skips this file. a "." leaves it alone
|
|
*/
|
|
if (tmpname[0] == '\0') {
|
|
tty_prnt("Skipping file.\n");
|
|
return(1);
|
|
}
|
|
if ((tmpname[0] == '.') && (tmpname[1] == '\0')) {
|
|
tty_prnt("Processing continues, name unchanged.\n");
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* ok the name changed. We may run into links that point at this
|
|
* file later. we have to remember where the user sent the file
|
|
* in order to repair any links.
|
|
*/
|
|
tty_prnt("Processing continues, name changed to: %s\n", tmpname);
|
|
res = add_name(arcn->name, arcn->nlen, tmpname);
|
|
arcn->nlen = l_strncpy(arcn->name, tmpname, sizeof(arcn->name) - 1);
|
|
arcn->name[arcn->nlen] = '\0';
|
|
if (res < 0)
|
|
return(-1);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* set_dest()
|
|
* fix up the file name and the link name (if any) so this file will land
|
|
* in the destination directory (used during copy() -rw).
|
|
* Return:
|
|
* 0 if ok, -1 if failure (name too long)
|
|
*/
|
|
|
|
int
|
|
set_dest(ARCHD *arcn, char *dest_dir, int dir_len)
|
|
{
|
|
if (fix_path(arcn->name, &(arcn->nlen), dest_dir, dir_len) < 0)
|
|
return(-1);
|
|
|
|
/*
|
|
* It is really hard to deal with symlinks here, we cannot be sure
|
|
* if the name they point was moved (or will be moved). It is best to
|
|
* leave them alone.
|
|
*/
|
|
if ((arcn->type != PAX_HLK) && (arcn->type != PAX_HRG))
|
|
return(0);
|
|
|
|
if (fix_path(arcn->ln_name, &(arcn->ln_nlen), dest_dir, dir_len) < 0)
|
|
return(-1);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* fix_path
|
|
* concatenate dir_name and or_name and store the result in or_name (if
|
|
* it fits). This is one ugly function.
|
|
* Return:
|
|
* 0 if ok, -1 if the final name is too long
|
|
*/
|
|
|
|
static int
|
|
fix_path( char *or_name, int *or_len, char *dir_name, int dir_len)
|
|
{
|
|
char *src;
|
|
char *dest;
|
|
char *start;
|
|
int len;
|
|
|
|
/*
|
|
* we shift the or_name to the right enough to tack in the dir_name
|
|
* at the front. We make sure we have enough space for it all before
|
|
* we start. since dest always ends in a slash, we skip of or_name
|
|
* if it also starts with one.
|
|
*/
|
|
start = or_name;
|
|
src = start + *or_len;
|
|
dest = src + dir_len;
|
|
if (*start == '/') {
|
|
++start;
|
|
--dest;
|
|
}
|
|
if ((len = dest - or_name) > PAXPATHLEN) {
|
|
paxwarn(1, "File name %s/%s, too long", dir_name, start);
|
|
return(-1);
|
|
}
|
|
*or_len = len;
|
|
|
|
/*
|
|
* enough space, shift
|
|
*/
|
|
while (src >= start)
|
|
*dest-- = *src--;
|
|
src = dir_name + dir_len - 1;
|
|
|
|
/*
|
|
* splice in the destination directory name
|
|
*/
|
|
while (src >= dir_name)
|
|
*dest-- = *src--;
|
|
|
|
*(or_name + len) = '\0';
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* rep_name()
|
|
* walk down the list of replacement strings applying each one in order.
|
|
* when we find one with a successful substitution, we modify the name
|
|
* as specified. if required, we print the results. if the resulting name
|
|
* is empty, we will skip this archive member. We use the regexp(3)
|
|
* routines (regexp() ought to win a prize as having the most cryptic
|
|
* library function manual page).
|
|
* --Parameters--
|
|
* name is the file name we are going to apply the regular expressions to
|
|
* (and may be modified)
|
|
* nlen is the length of this name (and is modified to hold the length of
|
|
* the final string).
|
|
* prnt is a flag that says whether to print the final result.
|
|
* Return:
|
|
* 0 if substitution was successful, 1 if we are to skip the file (the name
|
|
* ended up empty)
|
|
*/
|
|
|
|
static int
|
|
rep_name(char *name, int *nlen, int prnt)
|
|
{
|
|
REPLACE *pt;
|
|
char *inpt;
|
|
char *outpt;
|
|
char *endpt;
|
|
char *rpt;
|
|
int found = 0;
|
|
int res;
|
|
# ifndef NET2_REGEX
|
|
regmatch_t pm[MAXSUBEXP];
|
|
# endif
|
|
char nname[PAXPATHLEN+1]; /* final result of all replacements */
|
|
char buf1[PAXPATHLEN+1]; /* where we work on the name */
|
|
|
|
/*
|
|
* copy the name into buf1, where we will work on it. We need to keep
|
|
* the orig string around so we can print out the result of the final
|
|
* replacement. We build up the final result in nname. inpt points at
|
|
* the string we apply the regular expression to. prnt is used to
|
|
* suppress printing when we handle replacements on the link field
|
|
* (the user already saw that substitution go by)
|
|
*/
|
|
pt = rephead;
|
|
(void)strcpy(buf1, name);
|
|
inpt = buf1;
|
|
outpt = nname;
|
|
endpt = outpt + PAXPATHLEN;
|
|
|
|
/*
|
|
* try each replacement string in order
|
|
*/
|
|
while (pt != NULL) {
|
|
do {
|
|
/*
|
|
* check for a successful substitution, if not go to
|
|
* the next pattern, or cleanup if we were global
|
|
*/
|
|
# ifdef NET2_REGEX
|
|
if (regexec(pt->rcmp, inpt) == 0)
|
|
# else
|
|
if (regexec(&(pt->rcmp), inpt, MAXSUBEXP, pm, 0) != 0)
|
|
# endif
|
|
break;
|
|
|
|
/*
|
|
* ok we found one. We have three parts, the prefix
|
|
* which did not match, the section that did and the
|
|
* tail (that also did not match). Copy the prefix to
|
|
* the final output buffer (watching to make sure we
|
|
* do not create a string too long).
|
|
*/
|
|
found = 1;
|
|
# ifdef NET2_REGEX
|
|
rpt = pt->rcmp->startp[0];
|
|
# else
|
|
rpt = inpt + pm[0].rm_so;
|
|
# endif
|
|
|
|
while ((inpt < rpt) && (outpt < endpt))
|
|
*outpt++ = *inpt++;
|
|
if (outpt == endpt)
|
|
break;
|
|
|
|
/*
|
|
* for the second part (which matched the regular
|
|
* expression) apply the substitution using the
|
|
* replacement string and place it the prefix in the
|
|
* final output. If we have problems, skip it.
|
|
*/
|
|
# ifdef NET2_REGEX
|
|
if ((res = resub(pt->rcmp,pt->nstr,outpt,endpt)) < 0) {
|
|
# else
|
|
if ((res = resub(&(pt->rcmp),pm,pt->nstr,outpt,endpt))
|
|
< 0) {
|
|
# endif
|
|
if (prnt)
|
|
paxwarn(1, "Replacement name error %s",
|
|
name);
|
|
return(1);
|
|
}
|
|
outpt += res;
|
|
|
|
/*
|
|
* we set up to look again starting at the first
|
|
* character in the tail (of the input string right
|
|
* after the last character matched by the regular
|
|
* expression (inpt always points at the first char in
|
|
* the string to process). If we are not doing a global
|
|
* substitution, we will use inpt to copy the tail to
|
|
* the final result. Make sure we do not overrun the
|
|
* output buffer
|
|
*/
|
|
# ifdef NET2_REGEX
|
|
inpt = pt->rcmp->endp[0];
|
|
# else
|
|
inpt += pm[0].rm_eo - pm[0].rm_so;
|
|
# endif
|
|
|
|
if ((outpt == endpt) || (*inpt == '\0'))
|
|
break;
|
|
|
|
/*
|
|
* if the user wants global we keep trying to
|
|
* substitute until it fails, then we are done.
|
|
*/
|
|
} while (pt->flgs & GLOB);
|
|
|
|
if (found)
|
|
break;
|
|
|
|
/*
|
|
* a successful substitution did NOT occur, try the next one
|
|
*/
|
|
pt = pt->fow;
|
|
}
|
|
|
|
if (found) {
|
|
/*
|
|
* we had a substitution, copy the last tail piece (if there is
|
|
* room) to the final result
|
|
*/
|
|
while ((outpt < endpt) && (*inpt != '\0'))
|
|
*outpt++ = *inpt++;
|
|
|
|
*outpt = '\0';
|
|
if ((outpt == endpt) && (*inpt != '\0')) {
|
|
if (prnt)
|
|
paxwarn(1,"Replacement name too long %s >> %s",
|
|
name, nname);
|
|
return(1);
|
|
}
|
|
|
|
/*
|
|
* inform the user of the result if wanted
|
|
*/
|
|
if (prnt && (pt->flgs & PRNT)) {
|
|
if (*nname == '\0')
|
|
(void)fprintf(stderr,"%s >> <empty string>\n",
|
|
name);
|
|
else
|
|
(void)fprintf(stderr,"%s >> %s\n", name, nname);
|
|
}
|
|
|
|
/*
|
|
* if empty inform the caller this file is to be skipped
|
|
* otherwise copy the new name over the orig name and return
|
|
*/
|
|
if (*nname == '\0')
|
|
return(1);
|
|
*nlen = l_strncpy(name, nname, PAXPATHLEN + 1);
|
|
name[PAXPATHLEN] = '\0';
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
#ifdef NET2_REGEX
|
|
/*
|
|
* resub()
|
|
* apply the replacement to the matched expression. expand out the old
|
|
* style ed(1) subexpression expansion.
|
|
* Return:
|
|
* -1 if error, or the number of characters added to the destination.
|
|
*/
|
|
|
|
static int
|
|
resub(regexp *prog, char *src, char *dest, char *destend)
|
|
{
|
|
char *spt;
|
|
char *dpt;
|
|
char c;
|
|
int no;
|
|
int len;
|
|
|
|
spt = src;
|
|
dpt = dest;
|
|
while ((dpt < destend) && ((c = *spt++) != '\0')) {
|
|
if (c == '&')
|
|
no = 0;
|
|
else if ((c == '\\') && (*spt >= '0') && (*spt <= '9'))
|
|
no = *spt++ - '0';
|
|
else {
|
|
if ((c == '\\') && ((*spt == '\\') || (*spt == '&')))
|
|
c = *spt++;
|
|
*dpt++ = c;
|
|
continue;
|
|
}
|
|
if ((prog->startp[no] == NULL) || (prog->endp[no] == NULL) ||
|
|
((len = prog->endp[no] - prog->startp[no]) <= 0))
|
|
continue;
|
|
|
|
/*
|
|
* copy the subexpression to the destination.
|
|
* fail if we run out of space or the match string is damaged
|
|
*/
|
|
if (len > (destend - dpt))
|
|
len = destend - dpt;
|
|
if (l_strncpy(dpt, prog->startp[no], len) != len)
|
|
return(-1);
|
|
dpt += len;
|
|
}
|
|
return(dpt - dest);
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
* resub()
|
|
* apply the replacement to the matched expression. expand out the old
|
|
* style ed(1) subexpression expansion.
|
|
* Return:
|
|
* -1 if error, or the number of characters added to the destination.
|
|
*/
|
|
|
|
static int
|
|
resub(regex_t *rp, regmatch_t *pm, char *src, char *dest,
|
|
char *destend)
|
|
{
|
|
char *spt;
|
|
char *dpt;
|
|
char c;
|
|
regmatch_t *pmpt;
|
|
int len;
|
|
int subexcnt;
|
|
|
|
spt = src;
|
|
dpt = dest;
|
|
subexcnt = rp->re_nsub;
|
|
while ((dpt < destend) && ((c = *spt++) != '\0')) {
|
|
/*
|
|
* see if we just have an ordinary replacement character
|
|
* or we refer to a subexpression.
|
|
*/
|
|
if (c == '&') {
|
|
pmpt = pm;
|
|
} else if ((c == '\\') && (*spt >= '0') && (*spt <= '9')) {
|
|
/*
|
|
* make sure there is a subexpression as specified
|
|
*/
|
|
if ((len = *spt++ - '0') > subexcnt)
|
|
return(-1);
|
|
pmpt = pm + len;
|
|
} else {
|
|
/*
|
|
* Ordinary character, just copy it
|
|
*/
|
|
if ((c == '\\') && ((*spt == '\\') || (*spt == '&')))
|
|
c = *spt++;
|
|
*dpt++ = c;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* continue if the subexpression is bogus
|
|
*/
|
|
if ((pmpt->rm_so < 0) || (pmpt->rm_eo < 0) ||
|
|
((len = pmpt->rm_eo - pmpt->rm_so) <= 0))
|
|
continue;
|
|
|
|
/*
|
|
* copy the subexpression to the destination.
|
|
* fail if we run out of space or the match string is damaged
|
|
*/
|
|
if (len > (destend - dpt))
|
|
len = destend - dpt;
|
|
if (l_strncpy(dpt, src + pmpt->rm_so, len) != len)
|
|
return(-1);
|
|
dpt += len;
|
|
}
|
|
return(dpt - dest);
|
|
}
|
|
#endif
|