ed5c24e27d
.//dir as /dir. Rather strip it only for the purpose of checking if the directory path should be printed. PR: 88813 Submitted by: Josh Elsasser Patch from: NetBSD (cd.c rev 1.38) MFC after: 2 weeks
385 lines
8.2 KiB
C
385 lines
8.2 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Kenneth Almquist.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)cd.c 8.2 (Berkeley) 5/4/95";
|
|
#endif
|
|
#endif /* not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
|
|
/*
|
|
* The cd and pwd commands.
|
|
*/
|
|
|
|
#include "shell.h"
|
|
#include "var.h"
|
|
#include "nodes.h" /* for jobs.h */
|
|
#include "jobs.h"
|
|
#include "options.h"
|
|
#include "output.h"
|
|
#include "memalloc.h"
|
|
#include "error.h"
|
|
#include "exec.h"
|
|
#include "redir.h"
|
|
#include "mystring.h"
|
|
#include "show.h"
|
|
#include "cd.h"
|
|
|
|
STATIC int cdlogical(char *);
|
|
STATIC int cdphysical(char *);
|
|
STATIC int docd(char *, int, int);
|
|
STATIC char *getcomponent(void);
|
|
STATIC int updatepwd(char *);
|
|
|
|
STATIC char *curdir = NULL; /* current working directory */
|
|
STATIC char *prevdir; /* previous working directory */
|
|
STATIC char *cdcomppath;
|
|
|
|
int
|
|
cdcmd(int argc, char **argv)
|
|
{
|
|
char *dest;
|
|
char *path;
|
|
char *p;
|
|
struct stat statb;
|
|
int ch, phys, print = 0;
|
|
|
|
optreset = 1; optind = 1; opterr = 0; /* initialize getopt */
|
|
phys = Pflag;
|
|
while ((ch = getopt(argc, argv, "LP")) != -1) {
|
|
switch (ch) {
|
|
case 'L':
|
|
phys = 0;
|
|
break;
|
|
case 'P':
|
|
phys = 1;
|
|
break;
|
|
default:
|
|
error("unknown option: -%c", optopt);
|
|
break;
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc > 1)
|
|
error("too many arguments");
|
|
|
|
if ((dest = *argv) == NULL && (dest = bltinlookup("HOME", 1)) == NULL)
|
|
error("HOME not set");
|
|
if (*dest == '\0')
|
|
dest = ".";
|
|
if (dest[0] == '-' && dest[1] == '\0') {
|
|
dest = prevdir ? prevdir : curdir;
|
|
if (dest)
|
|
print = 1;
|
|
else
|
|
dest = ".";
|
|
}
|
|
if (*dest == '/' || (path = bltinlookup("CDPATH", 1)) == NULL)
|
|
path = nullstr;
|
|
while ((p = padvance(&path, dest)) != NULL) {
|
|
if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
|
|
if (!print) {
|
|
/*
|
|
* XXX - rethink
|
|
*/
|
|
if (p[0] == '.' && p[1] == '/' && p[2] != '\0')
|
|
print = strcmp(p + 2, dest);
|
|
else
|
|
print = strcmp(p, dest);
|
|
}
|
|
if (docd(p, print, phys) >= 0)
|
|
return 0;
|
|
}
|
|
}
|
|
error("can't cd to %s", dest);
|
|
/*NOTREACHED*/
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Actually change the directory. In an interactive shell, print the
|
|
* directory name if "print" is nonzero.
|
|
*/
|
|
STATIC int
|
|
docd(char *dest, int print, int phys)
|
|
{
|
|
|
|
TRACE(("docd(\"%s\", %d, %d) called\n", dest, print, phys));
|
|
|
|
/* If logical cd fails, fall back to physical. */
|
|
if ((phys || cdlogical(dest) < 0) && cdphysical(dest) < 0)
|
|
return (-1);
|
|
|
|
if (print && iflag && curdir)
|
|
out1fmt("%s\n", curdir);
|
|
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
cdlogical(char *dest)
|
|
{
|
|
char *p;
|
|
char *q;
|
|
char *component;
|
|
struct stat statb;
|
|
int first;
|
|
int badstat;
|
|
|
|
/*
|
|
* Check each component of the path. If we find a symlink or
|
|
* something we can't stat, clear curdir to force a getcwd()
|
|
* next time we get the value of the current directory.
|
|
*/
|
|
badstat = 0;
|
|
cdcomppath = stalloc(strlen(dest) + 1);
|
|
scopy(dest, cdcomppath);
|
|
STARTSTACKSTR(p);
|
|
if (*dest == '/') {
|
|
STPUTC('/', p);
|
|
cdcomppath++;
|
|
}
|
|
first = 1;
|
|
while ((q = getcomponent()) != NULL) {
|
|
if (q[0] == '\0' || (q[0] == '.' && q[1] == '\0'))
|
|
continue;
|
|
if (! first)
|
|
STPUTC('/', p);
|
|
first = 0;
|
|
component = q;
|
|
while (*q)
|
|
STPUTC(*q++, p);
|
|
if (equal(component, ".."))
|
|
continue;
|
|
STACKSTRNUL(p);
|
|
if (lstat(stackblock(), &statb) < 0) {
|
|
badstat = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
INTOFF;
|
|
if (updatepwd(badstat ? NULL : dest) < 0 || chdir(curdir) < 0) {
|
|
INTON;
|
|
return (-1);
|
|
}
|
|
INTON;
|
|
return (0);
|
|
}
|
|
|
|
STATIC int
|
|
cdphysical(char *dest)
|
|
{
|
|
|
|
INTOFF;
|
|
if (chdir(dest) < 0 || updatepwd(NULL) < 0) {
|
|
INTON;
|
|
return (-1);
|
|
}
|
|
INTON;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Get the next component of the path name pointed to by cdcomppath.
|
|
* This routine overwrites the string pointed to by cdcomppath.
|
|
*/
|
|
STATIC char *
|
|
getcomponent(void)
|
|
{
|
|
char *p;
|
|
char *start;
|
|
|
|
if ((p = cdcomppath) == NULL)
|
|
return NULL;
|
|
start = cdcomppath;
|
|
while (*p != '/' && *p != '\0')
|
|
p++;
|
|
if (*p == '\0') {
|
|
cdcomppath = NULL;
|
|
} else {
|
|
*p++ = '\0';
|
|
cdcomppath = p;
|
|
}
|
|
return start;
|
|
}
|
|
|
|
|
|
/*
|
|
* Update curdir (the name of the current directory) in response to a
|
|
* cd command. We also call hashcd to let the routines in exec.c know
|
|
* that the current directory has changed.
|
|
*/
|
|
STATIC int
|
|
updatepwd(char *dir)
|
|
{
|
|
char *new;
|
|
char *p;
|
|
|
|
hashcd(); /* update command hash table */
|
|
|
|
/*
|
|
* If our argument is NULL, we don't know the current directory
|
|
* any more because we traversed a symbolic link or something
|
|
* we couldn't stat().
|
|
*/
|
|
if (dir == NULL || curdir == NULL) {
|
|
if (prevdir)
|
|
ckfree(prevdir);
|
|
INTOFF;
|
|
prevdir = curdir;
|
|
curdir = NULL;
|
|
if (getpwd() == NULL) {
|
|
INTON;
|
|
return (-1);
|
|
}
|
|
setvar("PWD", curdir, VEXPORT);
|
|
setvar("OLDPWD", prevdir, VEXPORT);
|
|
INTON;
|
|
return (0);
|
|
}
|
|
cdcomppath = stalloc(strlen(dir) + 1);
|
|
scopy(dir, cdcomppath);
|
|
STARTSTACKSTR(new);
|
|
if (*dir != '/') {
|
|
p = curdir;
|
|
while (*p)
|
|
STPUTC(*p++, new);
|
|
if (p[-1] == '/')
|
|
STUNPUTC(new);
|
|
}
|
|
while ((p = getcomponent()) != NULL) {
|
|
if (equal(p, "..")) {
|
|
while (new > stackblock() && (STUNPUTC(new), *new) != '/');
|
|
} else if (*p != '\0' && ! equal(p, ".")) {
|
|
STPUTC('/', new);
|
|
while (*p)
|
|
STPUTC(*p++, new);
|
|
}
|
|
}
|
|
if (new == stackblock())
|
|
STPUTC('/', new);
|
|
STACKSTRNUL(new);
|
|
INTOFF;
|
|
if (prevdir)
|
|
ckfree(prevdir);
|
|
prevdir = curdir;
|
|
curdir = savestr(stackblock());
|
|
setvar("PWD", curdir, VEXPORT);
|
|
setvar("OLDPWD", prevdir, VEXPORT);
|
|
INTON;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
pwdcmd(int argc, char **argv)
|
|
{
|
|
char buf[PATH_MAX];
|
|
int ch, phys;
|
|
|
|
optreset = 1; optind = 1; opterr = 0; /* initialize getopt */
|
|
phys = Pflag;
|
|
while ((ch = getopt(argc, argv, "LP")) != -1) {
|
|
switch (ch) {
|
|
case 'L':
|
|
phys = 0;
|
|
break;
|
|
case 'P':
|
|
phys = 1;
|
|
break;
|
|
default:
|
|
error("unknown option: -%c", optopt);
|
|
break;
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc != 0)
|
|
error("too many arguments");
|
|
|
|
if (!phys && getpwd()) {
|
|
out1str(curdir);
|
|
out1c('\n');
|
|
} else {
|
|
if (getcwd(buf, sizeof(buf)) == NULL)
|
|
error(".: %s", strerror(errno));
|
|
out1str(buf);
|
|
out1c('\n');
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Find out what the current directory is. If we already know the current
|
|
* directory, this routine returns immediately.
|
|
*/
|
|
char *
|
|
getpwd(void)
|
|
{
|
|
char buf[PATH_MAX];
|
|
|
|
if (curdir)
|
|
return curdir;
|
|
if (getcwd(buf, sizeof(buf)) == NULL) {
|
|
char *pwd = getenv("PWD");
|
|
struct stat stdot, stpwd;
|
|
|
|
if (pwd && *pwd == '/' && stat(".", &stdot) != -1 &&
|
|
stat(pwd, &stpwd) != -1 &&
|
|
stdot.st_dev == stpwd.st_dev &&
|
|
stdot.st_ino == stpwd.st_ino) {
|
|
curdir = savestr(pwd);
|
|
return curdir;
|
|
}
|
|
return NULL;
|
|
}
|
|
curdir = savestr(buf);
|
|
|
|
return curdir;
|
|
}
|