83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
|
/* @(#)lxchdir.c 1.1 11/10/21 Copyright 2004-2011 J. Schilling */
|
||
|
|
/*
|
||
|
|
* Long path name aware chdir().
|
||
|
|
*
|
||
|
|
* The code has been adopted from libfind.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2004-2011 J. Schilling
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* The contents of this file are subject to the terms of the
|
||
|
|
* Common Development and Distribution License, Version 1.0 only
|
||
|
|
* (the "License"). You may not use this file except in compliance
|
||
|
|
* with the License.
|
||
|
|
*
|
||
|
|
* See the file CDDL.Schily.txt in this distribution for details.
|
||
|
|
*
|
||
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
||
|
|
* file and include the License file CDDL.Schily.txt from this distribution.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <schily/unistd.h>
|
||
|
|
#include <schily/types.h>
|
||
|
|
#include <schily/fcntl.h>
|
||
|
|
#include <schily/maxpath.h>
|
||
|
|
#include <schily/string.h>
|
||
|
|
#include <schily/errno.h>
|
||
|
|
#include <schily/standard.h>
|
||
|
|
#include <schily/schily.h>
|
||
|
|
#include "at-defs.h"
|
||
|
|
|
||
|
|
#ifndef ENAMETOOLONG
|
||
|
|
#define ENAMETOOLONG EINVAL
|
||
|
|
#endif
|
||
|
|
|
||
|
|
EXPORT int lxchdir __PR((char *p));
|
||
|
|
LOCAL int xchdir __PR((char *p));
|
||
|
|
|
||
|
|
EXPORT int
|
||
|
|
lxchdir(p)
|
||
|
|
char *p;
|
||
|
|
{
|
||
|
|
if (chdir(p) < 0) {
|
||
|
|
if (geterrno() != ENAMETOOLONG)
|
||
|
|
return (-1);
|
||
|
|
|
||
|
|
return (xchdir(p));
|
||
|
|
}
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
LOCAL int
|
||
|
|
xchdir(p)
|
||
|
|
char *p;
|
||
|
|
{
|
||
|
|
char *p2;
|
||
|
|
BOOL first = TRUE;
|
||
|
|
|
||
|
|
while (*p) {
|
||
|
|
if ((p2 = strchr(p, '/')) != NULL)
|
||
|
|
*p2 = '\0';
|
||
|
|
|
||
|
|
if (first && p2 && p[0] == '\0') {
|
||
|
|
if (chdir("/") < 0)
|
||
|
|
return (-1);
|
||
|
|
} else {
|
||
|
|
/*
|
||
|
|
* If this is not the first chdir() and we are doing a
|
||
|
|
* multi hop chdir(), we may be on an undefined
|
||
|
|
* intermediate directory. Mark this case by returning
|
||
|
|
* -2 instead of -1.
|
||
|
|
*/
|
||
|
|
if (chdir(p) < 0)
|
||
|
|
return (first?-1:-2);
|
||
|
|
}
|
||
|
|
if (p2 == NULL)
|
||
|
|
break;
|
||
|
|
*p2 = '/';
|
||
|
|
p = &p2[1];
|
||
|
|
first = FALSE;
|
||
|
|
}
|
||
|
|
return (0);
|
||
|
|
}
|