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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2015 PALO, Richard.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* UNIX shell
*/
#include "mac.h"
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include "defs.h"
#define DOT '.'
#define NULLCHAR '\0'
#define SLASH '/'
#define PARTLY 2
static void rmslash(unsigned char *string);
#ifdef __STDC__
extern const char longpwd[];
#else
extern char longpwd[];
#endif
extern char *getcwd();
unsigned char cwdname[PATH_MAX+1];
static int didpwd = FALSE;
void
cwd(unsigned char *dir)
{
unsigned char *pcwd;
unsigned char *pdir;
/* First remove extra /'s */
rmslash(dir);
/* Now remove any .'s */
pdir = dir;
if (*dir == SLASH)
pdir++;
while (*pdir) { /* remove /./ by itself */
if ((*pdir == DOT) && (*(pdir+1) == SLASH)) {
movstr(pdir+2, pdir);
continue;
}
pdir++;
while ((*pdir) && (*pdir != SLASH))
pdir++;
if (*pdir)
pdir++;
}
/* take care of trailing /. */
if (*(--pdir) == DOT && pdir > dir && *(--pdir) == SLASH) {
if (pdir > dir) {
*pdir = NULLCHAR;
} else {
*(pdir+1) = NULLCHAR;
}
}
/* Remove extra /'s */
rmslash(dir);
/* Now that the dir is canonicalized, process it */
if (*dir == DOT && *(dir+1) == NULLCHAR) {
return;
}
if (*dir == SLASH) {
/* Absolute path */
pcwd = cwdname;
*pcwd++ = *dir++;
didpwd = PARTLY;
}
else
{
/* Relative path */
if (didpwd == FALSE)
return;
didpwd = PARTLY;
pcwd = cwdname + length(cwdname) - 1;
if (pcwd != cwdname+1)
*pcwd++ = SLASH;
}
while (*dir) {
if (*dir == DOT &&
*(dir+1) == DOT &&
(*(dir+2) == SLASH || *(dir+2) == NULLCHAR)) {
/* Parent directory, so backup one */
if (pcwd > cwdname+2)
--pcwd;
while (*(--pcwd) != SLASH)
;
pcwd++;
dir += 2;
if (*dir == SLASH) {
dir++;
}
continue;
}
if (pcwd >= &cwdname[PATH_MAX+1]) {
didpwd = FALSE;
return;
}
*pcwd++ = *dir++;
while ((*dir) && (*dir != SLASH)) {
if (pcwd >= &cwdname[PATH_MAX+1]) {
didpwd = FALSE;
return;
}
*pcwd++ = *dir++;
}
if (*dir) {
if (pcwd >= &cwdname[PATH_MAX+1]) {
didpwd = FALSE;
return;
}
*pcwd++ = *dir++;
}
}
if (pcwd >= &cwdname[PATH_MAX+1]) {
didpwd = FALSE;
return;
}
*pcwd = NULLCHAR;
--pcwd;
if (pcwd > cwdname && *pcwd == SLASH) {
/* Remove trailing / */
*pcwd = NULLCHAR;
}
}
void
cwd2()
{
struct stat stat1, stat2;
unsigned char *pcwd;
/* check if there are any symbolic links in pathname */
if (didpwd == FALSE)
return;
pcwd = cwdname + 1;
if (didpwd == PARTLY) {
while (*pcwd) {
char c;
do {
c = *pcwd++;
} while (c != SLASH && c != NULLCHAR);
*--pcwd = NULLCHAR;
if (lstat((char *)cwdname, &stat1) == -1 ||
(stat1.st_mode & S_IFMT) == S_IFLNK) {
didpwd = FALSE;
*pcwd = c;
return;
}
*pcwd = c;
if (c)
pcwd++;
}
didpwd = TRUE;
} else
if (stat((char *)cwdname, &stat1) == -1) {
didpwd = FALSE;
return;
}
/*
* check if ino's and dev's match; pathname could
* consist of symbolic links with ".."
*/
if (stat(".", &stat2) == -1 ||
stat1.st_dev != stat2.st_dev ||
stat1.st_ino != stat2.st_ino)
didpwd = FALSE;
}
unsigned char *
cwdget()
{
cwd2();
if (didpwd == FALSE) {
if (getcwd((char *)cwdname, PATH_MAX+1) == NULL)
*cwdname = NULLCHAR;
didpwd = TRUE;
}
return (cwdname);
}
/*
* Print the current working directory.
*/
void
cwdprint(void)
{
unsigned char *cp;
cwd2();
if (didpwd == FALSE) {
if (getcwd((char *)cwdname, PATH_MAX+1) == NULL) {
if (errno && errno != ERANGE)
error(badpwd);
else
error(longpwd);
}
didpwd = TRUE;
}
for (cp = cwdname; *cp; cp++) {
prc_buff(*cp);
}
prc_buff(NL);
}
/*
* This routine will remove repeated slashes from string.
*/
static void
rmslash(unsigned char *string)
{
unsigned char *pstring;
pstring = string;
while (*pstring) {
if (*pstring == SLASH && *(pstring+1) == SLASH) {
/* Remove repeated SLASH's */
movstr(pstring+1, pstring);
continue;
}
pstring++;
}
--pstring;
if (pstring > string && *pstring == SLASH) {
/* Remove trailing / */
*pstring = NULLCHAR;
}
}
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