901 lines
20 KiB
C
901 lines
20 KiB
C
/* $NetBSD: dir.c,v 1.22 2003/08/07 09:05:04 agc Exp $ */
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/*-
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* Copyright (c) 1980, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)dir.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: dir.c,v 1.22 2003/08/07 09:05:04 agc Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "csh.h"
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#include "dir.h"
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#include "extern.h"
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/* Directory management. */
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static struct directory *dfind(Char *);
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static Char *dfollow(Char *);
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static void printdirs(void);
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static Char *dgoto(Char *);
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static void skipargs(Char ***, char *);
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static void dnewcwd(struct directory *);
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static void dset(Char *);
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struct directory dhead; /* "head" of loop */
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int printd; /* force name to be printed */
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static int dirflag = 0;
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/*
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* dinit - initialize current working directory
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*/
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void
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dinit(Char *hp)
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{
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static const char emsg[] = "csh: Trying to start from \"%s\"\n";
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char path[MAXPATHLEN];
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struct directory *dp;
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const char *ecp;
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Char *cp;
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/* Don't believe the login shell home, because it may be a symlink */
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ecp = getcwd(path, MAXPATHLEN);
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if (ecp == NULL || *ecp == '\0') {
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(void)fprintf(csherr, "csh: %s\n", strerror(errno));
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if (hp && *hp) {
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ecp = short2str(hp);
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if (chdir(ecp) == -1)
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cp = NULL;
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else
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cp = hp;
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(void)fprintf(csherr, emsg, vis_str(hp));
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}
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else
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cp = NULL;
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if (cp == NULL) {
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(void)fprintf(csherr, emsg, "/");
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if (chdir("/") == -1) {
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/* I am not even try to print an error message! */
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xexit(1);
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}
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cp = SAVE("/");
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}
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}
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else {
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struct stat swd, shp;
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/*
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* See if $HOME is the working directory we got and use that
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*/
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if (hp && *hp &&
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stat(ecp, &swd) != -1 && stat(short2str(hp), &shp) != -1 &&
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swd.st_dev == shp.st_dev && swd.st_ino == shp.st_ino)
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cp = hp;
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else {
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const char *cwd;
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/*
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* use PWD if we have it (for subshells)
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*/
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if ((cwd = getenv("PWD")) != NULL) {
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if (stat(cwd, &shp) != -1 && swd.st_dev == shp.st_dev &&
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swd.st_ino == shp.st_ino)
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ecp = cwd;
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}
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cp = dcanon(SAVE(ecp), STRNULL);
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}
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}
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dp = (struct directory *)xcalloc(1, sizeof(struct directory));
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dp->di_name = Strsave(cp);
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dp->di_count = 0;
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dhead.di_next = dhead.di_prev = dp;
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dp->di_next = dp->di_prev = &dhead;
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printd = 0;
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dnewcwd(dp);
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}
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static void
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dset(Char *dp)
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{
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Char **vec;
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/*
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* Don't call set() directly cause if the directory contains ` or
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* other junk characters glob will fail.
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*/
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vec = (Char **)xmalloc((size_t)(2 * sizeof(Char **)));
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vec[0] = Strsave(dp);
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vec[1] = 0;
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setq(STRcwd, vec, &shvhed);
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Setenv(STRPWD, dp);
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}
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#define DIR_LONG 1
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#define DIR_VERT 2
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#define DIR_LINE 4
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static void
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skipargs(Char ***v, char *str)
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{
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Char **n, *s;
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n = *v;
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dirflag = 0;
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for (n++; *n != NULL && (*n)[0] == '-'; n++)
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for (s = &((*n)[1]); *s; s++)
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switch (*s) {
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case 'l':
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dirflag |= DIR_LONG;
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break;
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case 'n':
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dirflag |= DIR_LINE;
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break;
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case 'v':
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dirflag |= DIR_VERT;
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break;
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default:
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stderror(ERR_DIRUS, vis_str(**v), str);
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/* NOTREACHED */
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}
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*v = n;
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}
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/*
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* dodirs - list all directories in directory loop
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*/
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void
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/*ARGSUSED*/
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dodirs(Char **v, struct command *t)
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{
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skipargs(&v, "");
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if (*v != NULL)
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stderror(ERR_DIRUS, "dirs", "");
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printdirs();
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}
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static void
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printdirs(void)
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{
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struct directory *dp;
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Char *hp, *s;
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int cur, idx, len;
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hp = value(STRhome);
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if (*hp == '\0')
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hp = NULL;
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dp = dcwd;
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idx = 0;
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cur = 0;
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do {
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if (dp == &dhead)
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continue;
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if (dirflag & DIR_VERT) {
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(void)fprintf(cshout, "%d\t", idx++);
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cur = 0;
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}
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if (!(dirflag & DIR_LONG) && hp != NULL && !eq(hp, STRslash) &&
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(len = Strlen(hp), Strncmp(hp, dp->di_name, len) == 0) &&
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(dp->di_name[len] == '\0' || dp->di_name[len] == '/'))
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len = Strlen(s = (dp->di_name + len)) + 2;
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else
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len = Strlen(s = dp->di_name) + 1;
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cur += len;
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if ((dirflag & DIR_LINE) && cur >= 80 - 1 && len < 80) {
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(void)fprintf(cshout, "\n");
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cur = len;
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}
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(void) fprintf(cshout, "%s%s%c", (s != dp->di_name)? "~" : "",
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vis_str(s), (dirflag & DIR_VERT) ? '\n' : ' ');
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} while ((dp = dp->di_prev) != dcwd);
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if (!(dirflag & DIR_VERT))
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(void)fprintf(cshout, "\n");
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}
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void
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dtildepr(Char *home, Char *dir)
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{
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if (!eq(home, STRslash) && prefix(home, dir))
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(void)fprintf(cshout, "~%s", vis_str(dir + Strlen(home)));
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else
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(void)fprintf(cshout, "%s", vis_str(dir));
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}
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void
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dtilde(void)
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{
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struct directory *d;
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d = dcwd;
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do {
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if (d == &dhead)
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continue;
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d->di_name = dcanon(d->di_name, STRNULL);
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} while ((d = d->di_prev) != dcwd);
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dset(dcwd->di_name);
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}
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/* dnormalize():
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* If the name starts with . or .. then we might need to normalize
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* it depending on the symbolic link flags
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*/
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Char *
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dnormalize(Char *cp)
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{
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#define UC (unsigned char)
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#define ISDOT(c) (UC(c)[0] == '.' && ((UC(c)[1] == '\0') || (UC(c)[1] == '/')))
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#define ISDOTDOT(c) (UC(c)[0] == '.' && ISDOT(&((c)[1])))
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if ((unsigned char) cp[0] == '/')
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return (Strsave(cp));
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if (adrof(STRignore_symlinks)) {
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int dotdot = 0;
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Char *dp, *cwd;
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cwd = (Char *)xmalloc((size_t)((Strlen(dcwd->di_name) + 3) *
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sizeof(Char)));
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(void)Strcpy(cwd, dcwd->di_name);
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/*
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* Ignore . and count ..'s
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*/
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while (*cp) {
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if (ISDOT(cp)) {
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if (*++cp)
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cp++;
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}
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else if (ISDOTDOT(cp)) {
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dotdot++;
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cp += 2;
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if (*cp)
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cp++;
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}
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else
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break;
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}
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while (dotdot > 0) {
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dp = Strrchr(cwd, '/');
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if (dp) {
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*dp = '\0';
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dotdot--;
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}
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else
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break;
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}
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if (*cp) {
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cwd[dotdot = Strlen(cwd)] = '/';
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cwd[dotdot + 1] = '\0';
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dp = Strspl(cwd, cp);
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xfree((ptr_t) cwd);
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return dp;
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}
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else {
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if (!*cwd) {
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cwd[0] = '/';
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cwd[1] = '\0';
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}
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return cwd;
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}
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}
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return Strsave(cp);
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}
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/*
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* dochngd - implement chdir command.
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*/
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void
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/*ARGSUSED*/
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dochngd(Char **v, struct command *t)
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{
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struct directory *dp;
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Char *cp;
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skipargs(&v, " [<dir>]");
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printd = 0;
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if (*v == NULL) {
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if ((cp = value(STRhome)) == NULL || *cp == 0)
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stderror(ERR_NAME | ERR_NOHOMEDIR);
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if (chdir(short2str(cp)) < 0)
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stderror(ERR_NAME | ERR_CANTCHANGE);
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cp = Strsave(cp);
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}
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else if (v[1] != NULL)
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stderror(ERR_NAME | ERR_TOOMANY);
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else if ((dp = dfind(*v)) != 0) {
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char *tmp;
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printd = 1;
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if (chdir(tmp = short2str(dp->di_name)) < 0)
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stderror(ERR_SYSTEM, tmp, strerror(errno));
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dcwd->di_prev->di_next = dcwd->di_next;
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dcwd->di_next->di_prev = dcwd->di_prev;
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dfree(dcwd);
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dnewcwd(dp);
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return;
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}
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else
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cp = dfollow(*v);
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dp = (struct directory *)xcalloc(1, sizeof(struct directory));
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dp->di_name = cp;
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dp->di_count = 0;
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dp->di_next = dcwd->di_next;
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dp->di_prev = dcwd->di_prev;
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dp->di_prev->di_next = dp;
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dp->di_next->di_prev = dp;
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dfree(dcwd);
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dnewcwd(dp);
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}
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static Char *
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dgoto(Char *cp)
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{
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Char *dp;
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if (*cp != '/') {
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Char *p, *q;
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int cwdlen;
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for (p = dcwd->di_name; *p++;)
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continue;
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if ((cwdlen = p - dcwd->di_name - 1) == 1) /* root */
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cwdlen = 0;
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for (p = cp; *p++;)
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continue;
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dp = (Char *)xmalloc((size_t)((cwdlen + (p - cp) + 1) * sizeof(Char)));
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for (p = dp, q = dcwd->di_name; (*p++ = *q++) != '\0';)
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continue;
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if (cwdlen)
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p[-1] = '/';
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else
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p--; /* don't add a / after root */
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for (q = cp; (*p++ = *q++) != '\0';)
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continue;
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xfree((ptr_t) cp);
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cp = dp;
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dp += cwdlen;
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}
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else
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dp = cp;
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cp = dcanon(cp, dp);
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return cp;
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}
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/*
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* dfollow - change to arg directory; fall back on cdpath if not valid
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*/
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static Char *
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dfollow(Char *cp)
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{
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char ebuf[MAXPATHLEN];
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struct varent *c;
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Char *dp;
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int serrno;
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cp = globone(cp, G_ERROR);
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/*
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* if we are ignoring symlinks, try to fix relatives now.
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*/
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dp = dnormalize(cp);
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if (chdir(short2str(dp)) >= 0) {
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xfree((ptr_t) cp);
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return dgoto(dp);
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}
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else {
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xfree((ptr_t) dp);
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if (chdir(short2str(cp)) >= 0)
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return dgoto(cp);
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serrno = errno;
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}
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if (cp[0] != '/' && !prefix(STRdotsl, cp) && !prefix(STRdotdotsl, cp)
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&& (c = adrof(STRcdpath))) {
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Char **cdp;
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Char *p;
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Char buf[MAXPATHLEN];
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for (cdp = c->vec; *cdp; cdp++) {
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for (dp = buf, p = *cdp; (*dp++ = *p++) != '\0';)
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continue;
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dp[-1] = '/';
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for (p = cp; (*dp++ = *p++) != '\0';)
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continue;
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if (chdir(short2str(buf)) >= 0) {
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printd = 1;
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xfree((ptr_t) cp);
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cp = Strsave(buf);
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return dgoto(cp);
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}
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}
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}
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dp = value(cp);
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if ((dp[0] == '/' || dp[0] == '.') && chdir(short2str(dp)) >= 0) {
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xfree((ptr_t) cp);
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cp = Strsave(dp);
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printd = 1;
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return dgoto(cp);
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}
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(void)strcpy(ebuf, short2str(cp));
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xfree((ptr_t) cp);
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stderror(ERR_SYSTEM, ebuf, strerror(serrno));
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/* NOTREACHED */
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}
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/*
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* dopushd - push new directory onto directory stack.
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* with no arguments exchange top and second.
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* with numeric argument (+n) bring it to top.
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*/
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void
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/*ARGSUSED*/
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dopushd(Char **v, struct command *t)
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{
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struct directory *dp;
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skipargs(&v, " [<dir>|+<n>]");
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printd = 1;
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if (*v == NULL) {
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char *tmp;
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if ((dp = dcwd->di_prev) == &dhead)
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dp = dhead.di_prev;
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if (dp == dcwd)
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stderror(ERR_NAME | ERR_NODIR);
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if (chdir(tmp = short2str(dp->di_name)) < 0)
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stderror(ERR_SYSTEM, tmp, strerror(errno));
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dp->di_prev->di_next = dp->di_next;
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dp->di_next->di_prev = dp->di_prev;
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dp->di_next = dcwd->di_next;
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dp->di_prev = dcwd;
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dcwd->di_next->di_prev = dp;
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dcwd->di_next = dp;
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}
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else if (v[1] != NULL)
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stderror(ERR_NAME | ERR_TOOMANY);
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else if ((dp = dfind(*v)) != NULL) {
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char *tmp;
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if (chdir(tmp = short2str(dp->di_name)) < 0)
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stderror(ERR_SYSTEM, tmp, strerror(errno));
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}
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else {
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Char *ccp;
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ccp = dfollow(*v);
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dp = (struct directory *)xcalloc(1, sizeof(struct directory));
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dp->di_name = ccp;
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dp->di_count = 0;
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dp->di_prev = dcwd;
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dp->di_next = dcwd->di_next;
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dcwd->di_next = dp;
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dp->di_next->di_prev = dp;
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}
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dnewcwd(dp);
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}
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/*
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* dfind - find a directory if specified by numeric (+n) argument
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*/
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static struct directory *
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dfind(Char *cp)
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{
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struct directory *dp;
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Char *ep;
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int i;
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if (*cp++ != '+')
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return (0);
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for (ep = cp; Isdigit(*ep); ep++)
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continue;
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if (*ep)
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return (0);
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i = getn(cp);
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|
if (i <= 0)
|
|
return (0);
|
|
for (dp = dcwd; i != 0; i--) {
|
|
if ((dp = dp->di_prev) == &dhead)
|
|
dp = dp->di_prev;
|
|
if (dp == dcwd)
|
|
stderror(ERR_NAME | ERR_DEEP);
|
|
}
|
|
return (dp);
|
|
}
|
|
|
|
/*
|
|
* dopopd - pop a directory out of the directory stack
|
|
* with a numeric argument just discard it.
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
dopopd(Char **v, struct command *t)
|
|
{
|
|
struct directory *dp, *p = NULL;
|
|
|
|
skipargs(&v, " [+<n>]");
|
|
printd = 1;
|
|
if (*v == NULL)
|
|
dp = dcwd;
|
|
else if (v[1] != NULL)
|
|
stderror(ERR_NAME | ERR_TOOMANY);
|
|
else if ((dp = dfind(*v)) == 0)
|
|
stderror(ERR_NAME | ERR_BADDIR);
|
|
if (dp->di_prev == &dhead && dp->di_next == &dhead)
|
|
stderror(ERR_NAME | ERR_EMPTY);
|
|
if (dp == dcwd) {
|
|
char *tmp;
|
|
|
|
if ((p = dp->di_prev) == &dhead)
|
|
p = dhead.di_prev;
|
|
if (chdir(tmp = short2str(p->di_name)) < 0)
|
|
stderror(ERR_SYSTEM, tmp, strerror(errno));
|
|
}
|
|
dp->di_prev->di_next = dp->di_next;
|
|
dp->di_next->di_prev = dp->di_prev;
|
|
if (dp == dcwd)
|
|
dnewcwd(p);
|
|
else {
|
|
printdirs();
|
|
}
|
|
dfree(dp);
|
|
}
|
|
|
|
/*
|
|
* dfree - free the directory (or keep it if it still has ref count)
|
|
*/
|
|
void
|
|
dfree(struct directory *dp)
|
|
{
|
|
|
|
if (dp->di_count != 0) {
|
|
dp->di_next = dp->di_prev = 0;
|
|
}
|
|
else {
|
|
xfree((char *) dp->di_name);
|
|
xfree((ptr_t) dp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* dcanon - canonicalize the pathname, removing excess ./ and ../ etc.
|
|
* we are of course assuming that the file system is standardly
|
|
* constructed (always have ..'s, directories have links)
|
|
*/
|
|
Char *
|
|
dcanon(Char *cp, Char *p)
|
|
{
|
|
Char slink[MAXPATHLEN];
|
|
char tlink[MAXPATHLEN];
|
|
Char *newcp, *sp;
|
|
Char *p1, *p2; /* general purpose */
|
|
int cc;
|
|
bool slash;
|
|
|
|
/*
|
|
* christos: if the path given does not start with a slash prepend cwd. If
|
|
* cwd does not start with a path or the result would be too long abort().
|
|
*/
|
|
if (*cp != '/') {
|
|
Char tmpdir[MAXPATHLEN];
|
|
|
|
p1 = value(STRcwd);
|
|
if (p1 == NULL || *p1 != '/')
|
|
abort();
|
|
if (Strlen(p1) + Strlen(cp) + 1 >= MAXPATHLEN)
|
|
abort();
|
|
(void)Strcpy(tmpdir, p1);
|
|
(void)Strcat(tmpdir, STRslash);
|
|
(void)Strcat(tmpdir, cp);
|
|
xfree((ptr_t) cp);
|
|
cp = p = Strsave(tmpdir);
|
|
}
|
|
|
|
while (*p) { /* for each component */
|
|
sp = p; /* save slash address */
|
|
while (*++p == '/') /* flush extra slashes */
|
|
continue;
|
|
if (p != ++sp)
|
|
for (p1 = sp, p2 = p; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
p = sp; /* save start of component */
|
|
slash = 0;
|
|
while (*++p) /* find next slash or end of path */
|
|
if (*p == '/') {
|
|
slash = 1;
|
|
*p = 0;
|
|
break;
|
|
}
|
|
|
|
if (*sp == '\0') { /* if component is null */
|
|
if (--sp == cp) /* if path is one char (i.e. /) */
|
|
break;
|
|
else
|
|
*sp = '\0';
|
|
} else if (sp[0] == '.' && sp[1] == 0) {
|
|
if (slash) {
|
|
for (p1 = sp, p2 = p + 1; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
p = --sp;
|
|
}
|
|
else if (--sp != cp)
|
|
*sp = '\0';
|
|
}
|
|
else if (sp[0] == '.' && sp[1] == '.' && sp[2] == 0) {
|
|
/*
|
|
* We have something like "yyy/xxx/..", where "yyy" can be null or
|
|
* a path starting at /, and "xxx" is a single component. Before
|
|
* compressing "xxx/..", we want to expand "yyy/xxx", if it is a
|
|
* symbolic link.
|
|
*/
|
|
*--sp = 0; /* form the pathname for readlink */
|
|
if (sp != cp && !adrof(STRignore_symlinks) &&
|
|
(cc = readlink(short2str(cp), tlink,
|
|
sizeof(tlink) - 1)) >= 0) {
|
|
(void)Strcpy(slink, str2short(tlink));
|
|
slink[cc] = '\0';
|
|
|
|
if (slash)
|
|
*p = '/';
|
|
/*
|
|
* Point p to the '/' in "/..", and restore the '/'.
|
|
*/
|
|
*(p = sp) = '/';
|
|
/*
|
|
* find length of p
|
|
*/
|
|
for (p1 = p; *p1++;)
|
|
continue;
|
|
if (*slink != '/') {
|
|
/*
|
|
* Relative path, expand it between the "yyy/" and the
|
|
* "/..". First, back sp up to the character past "yyy/".
|
|
*/
|
|
while (*--sp != '/')
|
|
continue;
|
|
sp++;
|
|
*sp = 0;
|
|
/*
|
|
* New length is "yyy/" + slink + "/.." and rest
|
|
*/
|
|
p1 = newcp = (Char *)xmalloc(
|
|
(size_t)(((sp - cp) + cc + (p1 - p)) * sizeof(Char)));
|
|
/*
|
|
* Copy new path into newcp
|
|
*/
|
|
for (p2 = cp; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
for (p1--, p2 = slink; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
for (p1--, p2 = p; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
/*
|
|
* Restart canonicalization at expanded "/xxx".
|
|
*/
|
|
p = sp - cp - 1 + newcp;
|
|
}
|
|
else {
|
|
/*
|
|
* New length is slink + "/.." and rest
|
|
*/
|
|
p1 = newcp = (Char *)xmalloc(
|
|
(size_t)((cc + (p1 - p)) * sizeof(Char)));
|
|
/*
|
|
* Copy new path into newcp
|
|
*/
|
|
for (p2 = slink; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
for (p1--, p2 = p; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
/*
|
|
* Restart canonicalization at beginning
|
|
*/
|
|
p = newcp;
|
|
}
|
|
xfree((ptr_t) cp);
|
|
cp = newcp;
|
|
continue; /* canonicalize the link */
|
|
}
|
|
*sp = '/';
|
|
if (sp != cp)
|
|
while (*--sp != '/')
|
|
continue;
|
|
if (slash) {
|
|
for (p1 = sp + 1, p2 = p + 1; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
p = sp;
|
|
}
|
|
else if (cp == sp)
|
|
*++sp = '\0';
|
|
else
|
|
*sp = '\0';
|
|
}
|
|
else { /* normal dir name (not . or .. or nothing) */
|
|
|
|
if (sp != cp && adrof(STRchase_symlinks) &&
|
|
!adrof(STRignore_symlinks) &&
|
|
(cc = readlink(short2str(cp), tlink, sizeof(tlink)-1)) >= 0) {
|
|
(void)Strcpy(slink, str2short(tlink));
|
|
slink[cc] = '\0';
|
|
|
|
/*
|
|
* restore the '/'.
|
|
*/
|
|
if (slash)
|
|
*p = '/';
|
|
|
|
/*
|
|
* point sp to p (rather than backing up).
|
|
*/
|
|
sp = p;
|
|
|
|
/*
|
|
* find length of p
|
|
*/
|
|
for (p1 = p; *p1++;)
|
|
continue;
|
|
if (*slink != '/') {
|
|
/*
|
|
* Relative path, expand it between the "yyy/" and the
|
|
* remainder. First, back sp up to the character past
|
|
* "yyy/".
|
|
*/
|
|
while (*--sp != '/')
|
|
continue;
|
|
sp++;
|
|
*sp = 0;
|
|
/*
|
|
* New length is "yyy/" + slink + "/.." and rest
|
|
*/
|
|
p1 = newcp = (Char *)xmalloc(
|
|
(size_t)(((sp - cp) + cc + (p1 - p)) * sizeof(Char)));
|
|
/*
|
|
* Copy new path into newcp
|
|
*/
|
|
for (p2 = cp; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
for (p1--, p2 = slink; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
for (p1--, p2 = p; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
/*
|
|
* Restart canonicalization at expanded "/xxx".
|
|
*/
|
|
p = sp - cp - 1 + newcp;
|
|
}
|
|
else {
|
|
/*
|
|
* New length is slink + the rest
|
|
*/
|
|
p1 = newcp = (Char *)xmalloc(
|
|
(size_t)((cc + (p1 - p)) * sizeof(Char)));
|
|
/*
|
|
* Copy new path into newcp
|
|
*/
|
|
for (p2 = slink; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
for (p1--, p2 = p; (*p1++ = *p2++) != '\0';)
|
|
continue;
|
|
/*
|
|
* Restart canonicalization at beginning
|
|
*/
|
|
p = newcp;
|
|
}
|
|
xfree((ptr_t) cp);
|
|
cp = newcp;
|
|
continue; /* canonicalize the link */
|
|
}
|
|
if (slash)
|
|
*p = '/';
|
|
}
|
|
}
|
|
|
|
/*
|
|
* fix home...
|
|
*/
|
|
p1 = value(STRhome);
|
|
cc = Strlen(p1);
|
|
/*
|
|
* See if we're not in a subdir of STRhome
|
|
*/
|
|
if (p1 && *p1 == '/' &&
|
|
(Strncmp(p1, cp, cc) != 0 || (cp[cc] != '/' && cp[cc] != '\0'))) {
|
|
static ino_t home_ino;
|
|
static dev_t home_dev = NODEV;
|
|
static Char *home_ptr = NULL;
|
|
struct stat statbuf;
|
|
|
|
/*
|
|
* Get dev and ino of STRhome
|
|
*/
|
|
if (home_ptr != p1 &&
|
|
stat(short2str(p1), &statbuf) != -1) {
|
|
home_dev = statbuf.st_dev;
|
|
home_ino = statbuf.st_ino;
|
|
home_ptr = p1;
|
|
}
|
|
/*
|
|
* Start comparing dev & ino backwards
|
|
*/
|
|
p2 = Strcpy(slink, cp);
|
|
for (sp = NULL; *p2 && stat(short2str(p2), &statbuf) != -1;) {
|
|
if (statbuf.st_dev == home_dev &&
|
|
statbuf.st_ino == home_ino) {
|
|
sp = (Char *) - 1;
|
|
break;
|
|
}
|
|
if ((sp = Strrchr(p2, '/')) != NULL)
|
|
*sp = '\0';
|
|
}
|
|
/*
|
|
* See if we found it
|
|
*/
|
|
if (*p2 && sp == (Char *) -1) {
|
|
/*
|
|
* Use STRhome to make '~' work
|
|
*/
|
|
newcp = Strspl(p1, cp + Strlen(p2));
|
|
xfree((ptr_t) cp);
|
|
cp = newcp;
|
|
}
|
|
}
|
|
return cp;
|
|
}
|
|
|
|
|
|
/*
|
|
* dnewcwd - make a new directory in the loop the current one
|
|
*/
|
|
static void
|
|
dnewcwd(struct directory *dp)
|
|
{
|
|
dcwd = dp;
|
|
dset(dcwd->di_name);
|
|
if (printd && !(adrof(STRpushdsilent)))
|
|
printdirs();
|
|
}
|