tsrm_virtual_cwd.c 24.4 KB
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/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
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   | Copyright (c) 1997-2005 The PHP Group                                |
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   +----------------------------------------------------------------------+
   | This source file is subject to version 3.0 of the PHP license,       |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_0.txt.                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Andi Gutmans <andi@zend.com>                                |
   |          Sascha Schumann <sascha@schumann.cx>                        |
   +----------------------------------------------------------------------+
*/

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/* $Id: tsrm_virtual_cwd.c,v 1.74 2005/08/03 13:28:14 sniper Exp $ */
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#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <stdio.h>
#include <limits.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
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#include <time.h>
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#include "tsrm_virtual_cwd.h"
#include "tsrm_strtok_r.h"

#ifdef TSRM_WIN32
#include <io.h>
#include "tsrm_win32.h"
# if HAVE_NEWAPIS_H
#  define WANT_GETLONGPATHNAME_WRAPPER
#  define COMPILE_NEWAPIS_STUBS
#  include <NewAPIs.h>
# endif
#endif

#ifdef NETWARE
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#include <fsio.h>
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#endif

#ifndef HAVE_REALPATH
#define realpath(x,y) strcpy(y,x)
#endif

#define VIRTUAL_CWD_DEBUG 0

#include "TSRM.h"

/* Only need mutex for popen() in Windows and NetWare because it doesn't chdir() on UNIX */
#if (defined(TSRM_WIN32) || defined(NETWARE)) && defined(ZTS)
MUTEX_T cwd_mutex;
#endif

#ifdef ZTS
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ts_rsrc_id cwd_globals_id;
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#else
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virtual_cwd_globals cwd_globals;
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#endif

cwd_state main_cwd_state; /* True global */

#ifndef TSRM_WIN32
#include <unistd.h>
#else
#include <direct.h>
#endif

#ifndef S_ISDIR
#define S_ISDIR(mode) ((mode) & _S_IFDIR)
#endif

#ifndef S_ISREG
#define S_ISREG(mode) ((mode) & _S_IFREG)
#endif

#ifdef TSRM_WIN32
#include <tchar.h>
#define tsrm_strtok_r(a,b,c) _tcstok((a),(b))
#define TOKENIZER_STRING "/\\"
	
static int php_check_dots(const char *element, int n) 
{
	while (n-- > 0) if (element[n] != '.') break;

	return (n != -1);
}
	
#define IS_DIRECTORY_UP(element, len) \
	(len >= 2 && !php_check_dots(element, len))

#define IS_DIRECTORY_CURRENT(element, len) \
	(len == 1 && element[0] == '.')

#elif defined(NETWARE)
/* NetWare has strtok() (in LibC) and allows both slashes in paths, like Windows --
   but rest of the stuff is like Unix */
/* strtok() call in LibC is abending when used in a different address space -- hence using
   PHP's version itself for now */
/*#define tsrm_strtok_r(a,b,c) strtok((a),(b))*/
#define TOKENIZER_STRING "/\\"

#else
#define TOKENIZER_STRING "/"
#endif


/* default macros */

#ifndef IS_DIRECTORY_UP
#define IS_DIRECTORY_UP(element, len) \
	(len == 2 && element[0] == '.' && element[1] == '.')
#endif

#ifndef IS_DIRECTORY_CURRENT
#define IS_DIRECTORY_CURRENT(element, len) \
	(len == 1 && element[0] == '.')
#endif

/* define this to check semantics */
#define IS_DIR_OK(s) (1)
	
#ifndef IS_DIR_OK
#define IS_DIR_OK(state) (php_is_dir_ok(state) == 0)
#endif


#define CWD_STATE_COPY(d, s)				\
	(d)->cwd_length = (s)->cwd_length;		\
	(d)->cwd = (char *) malloc((s)->cwd_length+1);	\
	memcpy((d)->cwd, (s)->cwd, (s)->cwd_length+1);

#define CWD_STATE_FREE(s)			\
	free((s)->cwd);
	
static int php_is_dir_ok(const cwd_state *state) 
{
	struct stat buf;

	if (stat(state->cwd, &buf) == 0 && S_ISDIR(buf.st_mode))
		return (0);

	return (1);
}

static int php_is_file_ok(const cwd_state *state) 
{
	struct stat buf;

	if (stat(state->cwd, &buf) == 0 && S_ISREG(buf.st_mode))
		return (0);

	return (1);
}

static void cwd_globals_ctor(virtual_cwd_globals *cwd_globals TSRMLS_DC)
{
	CWD_STATE_COPY(&cwd_globals->cwd, &main_cwd_state);
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#ifdef REALPATH_CACHE
	cwd_globals->realpath_cache_size = 0;
	cwd_globals->realpath_cache_size_limit = REALPATH_CACHE_SIZE;
	cwd_globals->realpath_cache_ttl = REALPATH_CACHE_TTL;
	memset(cwd_globals->realpath_cache, 0, sizeof(cwd_globals->realpath_cache));
#endif
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}

static void cwd_globals_dtor(virtual_cwd_globals *cwd_globals TSRMLS_DC)
{
	CWD_STATE_FREE(&cwd_globals->cwd);
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#ifdef REALPATH_CACHE
	{
		int i;

		for (i = 0; i < sizeof(cwd_globals->realpath_cache)/sizeof(cwd_globals->realpath_cache[0]); i++) {
			realpath_cache_bucket *p = cwd_globals->realpath_cache[i];
			while (p != NULL) {
				realpath_cache_bucket *r = p;
				p = p->next;
				free(r);
			}
		}
	}
#endif
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}

static char *tsrm_strndup(const char *s, size_t length)
{
    char *p;

    p = (char *) malloc(length+1);
    if (!p) {
        return (char *)NULL;
    }
    if (length) {
        memcpy(p,s,length);
    }
    p[length]=0;
    return p;
}

CWD_API void virtual_cwd_startup(void)
{
	char cwd[MAXPATHLEN];
	char *result;

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#ifdef NETWARE
	result = getcwdpath(cwd, NULL, 1);
	if(result)
	{
		char *c=cwd;
		while(c = strchr(c, '\\'))
		{
			*c='/';
			++c;
		}
	}
#else
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	result = getcwd(cwd, sizeof(cwd));	
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#endif
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	if (!result) {
		cwd[0] = '\0';
	}
	main_cwd_state.cwd = strdup(cwd);
	main_cwd_state.cwd_length = strlen(cwd);

#ifdef ZTS
	ts_allocate_id(&cwd_globals_id, sizeof(virtual_cwd_globals), (ts_allocate_ctor) cwd_globals_ctor, (ts_allocate_dtor) cwd_globals_dtor);
#else
	cwd_globals_ctor(&cwd_globals TSRMLS_CC);
#endif

#if (defined(TSRM_WIN32) || defined(NETWARE)) && defined(ZTS)
	cwd_mutex = tsrm_mutex_alloc();
#endif
}

CWD_API void virtual_cwd_shutdown(void)
{
#ifndef ZTS
	cwd_globals_dtor(&cwd_globals TSRMLS_CC);
#endif
#if (defined(TSRM_WIN32) || defined(NETWARE)) && defined(ZTS)
	tsrm_mutex_free(cwd_mutex);
#endif

	free(main_cwd_state.cwd); /* Don't use CWD_STATE_FREE because the non global states will probably use emalloc()/efree() */
}

CWD_API char *virtual_getcwd_ex(size_t *length TSRMLS_DC)
{
	cwd_state *state;

	state = &CWDG(cwd);

	if (state->cwd_length == 0) {
		char *retval;

		*length = 1;
		retval = (char *) malloc(2);
		retval[0] = DEFAULT_SLASH;
		retval[1] = '\0';	
		return retval;
	}

#ifdef TSRM_WIN32
	/* If we have something like C: */
	if (state->cwd_length == 2 && state->cwd[state->cwd_length-1] == ':') {
		char *retval;

		*length = state->cwd_length+1;
		retval = (char *) malloc(*length+1);
		memcpy(retval, state->cwd, *length);
		retval[*length-1] = DEFAULT_SLASH;
		retval[*length] = '\0';
		return retval;
	}
#endif
	*length = state->cwd_length;
	return strdup(state->cwd);
}


/* Same semantics as UNIX getcwd() */
CWD_API char *virtual_getcwd(char *buf, size_t size TSRMLS_DC)
{
	size_t length;
	char *cwd;

	cwd = virtual_getcwd_ex(&length TSRMLS_CC);

	if (buf == NULL) {
		return cwd;
	}
	if (length > size-1) {
		free(cwd);
		errno = ERANGE; /* Is this OK? */
		return NULL;
	}
	memcpy(buf, cwd, length+1);
	free(cwd);
	return buf;
}

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#ifdef REALPATH_CACHE
static inline unsigned long realpath_cache_key(const char *path, int path_len)
{
  register unsigned long h;

  const char *e = path + path_len;
  for (h = 2166136261U; path < e; ) {
    h *= 16777619;
    h ^= *path++;
  }
  return h;
}

static inline void realpath_cache_add(const char *path, int path_len, const char *realpath, int realpath_len, time_t t TSRMLS_DC)
{
	long size = sizeof(realpath_cache_bucket) + path_len + 1 + realpath_len + 1;
	if (CWDG(realpath_cache_size) + size <= CWDG(realpath_cache_size_limit)) {
		realpath_cache_bucket *bucket = malloc(size);
		unsigned long n;
	
		bucket->key = realpath_cache_key(path, path_len);
		bucket->path = (char*)bucket + sizeof(realpath_cache_bucket);
		memcpy(bucket->path, path, path_len+1);
		bucket->path_len = path_len;
		bucket->realpath = bucket->path + (path_len + 1);
		memcpy(bucket->realpath, realpath, realpath_len+1);
		bucket->realpath_len = realpath_len;
		bucket->expires = t + CWDG(realpath_cache_ttl);
		n = bucket->key % (sizeof(CWDG(realpath_cache)) / sizeof(CWDG(realpath_cache)[0]));
		bucket->next = CWDG(realpath_cache)[n];
		CWDG(realpath_cache)[n] = bucket;
	  CWDG(realpath_cache_size) += size;
	}
}

static inline realpath_cache_bucket* realpath_cache_find(const char *path, int path_len, time_t t TSRMLS_DC)
{
	unsigned long key = realpath_cache_key(path, path_len);
	unsigned long n = key % (sizeof(CWDG(realpath_cache)) / sizeof(CWDG(realpath_cache)[0]));
	realpath_cache_bucket **bucket = &CWDG(realpath_cache)[n];

	while (*bucket != NULL) {
		if (CWDG(realpath_cache_ttl) && (*bucket)->expires < t) {
			realpath_cache_bucket *r = *bucket;
		  *bucket = (*bucket)->next;
		  CWDG(realpath_cache_size) -= sizeof(realpath_cache_bucket) + r->path_len + 1 + r->realpath_len + 1;
		  free(r);
		} else if (key == (*bucket)->key && path_len == (*bucket)->path_len &&
		           memcmp(path, (*bucket)->path, path_len) == 0) {
			return *bucket;
		} else {
			*bucket = (*bucket)->next;
		}
	}
	return NULL;
}
#endif


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/* Resolve path relatively to state and put the real path into state */
/* returns 0 for ok, 1 for error */
CWD_API int virtual_file_ex(cwd_state *state, const char *path, verify_path_func verify_path, int use_realpath)
{
	int path_length = strlen(path);
	char *ptr, *path_copy;
	char *tok = NULL;
	int ptr_length;
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	cwd_state old_state;
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	int ret = 0;
	int copy_amount = -1;
	char *free_path;
	unsigned char is_absolute = 0;
#ifndef TSRM_WIN32
	char resolved_path[MAXPATHLEN];
#else
	char *new_path;
#endif
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#ifdef REALPATH_CACHE
	char orig_path[MAXPATHLEN];
	int orig_path_len;
	realpath_cache_bucket *bucket;
	time_t t;
	TSRMLS_FETCH();
#endif
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	if (path_length == 0) 
		return (0);
	if (path_length >= MAXPATHLEN)
		return (1);

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#ifdef REALPATH_CACHE
	if (use_realpath && CWDG(realpath_cache_size_limit)) {
		if (IS_ABSOLUTE_PATH(path, path_length) || (state->cwd_length < 1)) {
			memcpy(orig_path, path, path_length+1);
			orig_path_len = path_length;
		} else {
			orig_path_len = path_length + state->cwd_length + 1;
			if (orig_path_len >= MAXPATHLEN) {
				return 1;
			}
			memcpy(orig_path, state->cwd, state->cwd_length);
			orig_path[state->cwd_length] = DEFAULT_SLASH;
			memcpy(orig_path + state->cwd_length + 1, path, path_length + 1);
		}
		t = CWDG(realpath_cache_ttl)?time(NULL):0;
		if ((bucket = realpath_cache_find(orig_path, orig_path_len, t TSRMLS_CC)) != NULL) {		
			int len = bucket->realpath_len;

			CWD_STATE_COPY(&old_state, state);
			state->cwd = (char *) realloc(state->cwd, len+1);
			memcpy(state->cwd, bucket->realpath, len+1);
			state->cwd_length = len;
			if (verify_path && verify_path(state)) {
				CWD_STATE_FREE(state);
				*state = old_state;
				return 1;
			} else {
				CWD_STATE_FREE(&old_state);
				return 0;
			}
		}
	}
#endif
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#if !defined(TSRM_WIN32) && !defined(NETWARE)
	/* cwd_length can be 0 when getcwd() fails.
	 * This can happen under solaris when a dir does not have read permissions
	 * but *does* have execute permissions */
	if (IS_ABSOLUTE_PATH(path, path_length) || (state->cwd_length < 1)) {
		if (use_realpath) {
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			if (realpath(path, resolved_path)) {  /* Note: Not threadsafe on older *BSD's */
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				path = resolved_path;
				path_length = strlen(path);
			} else {
				/* disable for now
				return 1; */
			}
		}
	} else { /* Concat current directory with relative path and then run realpath() on it */
		char *tmp;
		char *ptr;

		ptr = tmp = (char *) malloc(state->cwd_length+path_length+sizeof("/"));
		if (!tmp) {
			return 1;
		}
		memcpy(ptr, state->cwd, state->cwd_length);
		ptr += state->cwd_length;
		*ptr++ = DEFAULT_SLASH;
		memcpy(ptr, path, path_length);
		ptr += path_length;
		*ptr = '\0';
		if (strlen(tmp) >= MAXPATHLEN) {
			free(tmp);
			return 1;
		}
		if (use_realpath) {
			if (realpath(tmp, resolved_path)) {
				path = resolved_path;
				path_length = strlen(path);
			} else {
				/* disable for now 
				free(tmp);
				return 1; */
			}
		}
		free(tmp);
	}
#endif
#if defined(TSRM_WIN32)
	{
		char *dummy = NULL;
		int new_path_length;
  
		new_path_length = GetLongPathName(path, dummy, 0) + 1;
		if (new_path_length == 0) {
			return 1;
		}
		new_path = (char *) malloc(new_path_length);
		if (!new_path) {
			return 1;
		}
		
		if (GetLongPathName(path, new_path, new_path_length) != 0) {
			path = new_path;
			path_length = new_path_length;
		} else {
			free(new_path);
			new_path = NULL;
		}
	}
#endif
	free_path = path_copy = tsrm_strndup(path, path_length);

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	CWD_STATE_COPY(&old_state, state);
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#if VIRTUAL_CWD_DEBUG
	fprintf(stderr,"cwd = %s path = %s\n", state->cwd, path);
#endif
	if (IS_ABSOLUTE_PATH(path_copy, path_length)) {
        copy_amount = COPY_WHEN_ABSOLUTE(path_copy);
		is_absolute = 1;
#ifdef TSRM_WIN32
	} else if (IS_SLASH(path_copy[0])) {
		copy_amount = 2;
#endif
	}

	if (copy_amount != -1) {
		state->cwd = (char *) realloc(state->cwd, copy_amount + 1);
		if (copy_amount) {
			if (is_absolute) {
				memcpy(state->cwd, path_copy, copy_amount);
				path_copy += copy_amount;
			} else {
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				memcpy(state->cwd, old_state.cwd, copy_amount);
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			}
		}
		state->cwd[copy_amount] = '\0';
		state->cwd_length = copy_amount;
	}


	if (state->cwd_length > 0 || IS_ABSOLUTE_PATH(path, path_length)) {
		ptr = tsrm_strtok_r(path_copy, TOKENIZER_STRING, &tok);
		while (ptr) {
			ptr_length = strlen(ptr);

			if (IS_DIRECTORY_UP(ptr, ptr_length)) {
				char save;

				save = DEFAULT_SLASH;

#define PREVIOUS state->cwd[state->cwd_length - 1]

				while (IS_ABSOLUTE_PATH(state->cwd, state->cwd_length) &&
						!IS_SLASH(PREVIOUS)) {
					save = PREVIOUS;
					PREVIOUS = '\0';
					state->cwd_length--;
				}

				if (!IS_ABSOLUTE_PATH(state->cwd, state->cwd_length)) {
					state->cwd[state->cwd_length++] = save;
					state->cwd[state->cwd_length] = '\0';
				} else {
					PREVIOUS = '\0';
					state->cwd_length--;
				}
			} else if (!IS_DIRECTORY_CURRENT(ptr, ptr_length)) {
				state->cwd = (char *) realloc(state->cwd, state->cwd_length+ptr_length+1+1);
#ifdef TSRM_WIN32
				/* Windows 9x will consider C:\\Foo as a network path. Avoid it. */
				if ((state->cwd[state->cwd_length-1]!='\\' && state->cwd[state->cwd_length-1]!='/') || 
						IsDBCSLeadByte(state->cwd[state->cwd_length-2])) {
					state->cwd[state->cwd_length++] = DEFAULT_SLASH;
				}
#elif defined(NETWARE)
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				/* 
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				Below code keeps appending to state->cwd a File system seperator
				cases where this appending should not happen is given below,
				a) sys: should just be left as it is
				b) sys:system should just be left as it is,
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					Colon is allowed only in the first token as volume names alone can have the : in their names.
					Files and Directories cannot have : in their names
					So the check goes like this,
					For second token and above simply append the DEFAULT_SLASH to the state->cwd.
					For first token check for the existence of : 
					if it exists don't append the DEFAULT_SLASH to the state->cwd.
				*/
				if(((state->cwd_length == 0) && (strchr(ptr, ':') == NULL)) || (state->cwd_length > 0)) {
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					state->cwd[state->cwd_length++] = DEFAULT_SLASH;
				}
#else
				state->cwd[state->cwd_length++] = DEFAULT_SLASH;
#endif
				memcpy(&state->cwd[state->cwd_length], ptr, ptr_length+1);
				state->cwd_length += ptr_length;
			}
			ptr = tsrm_strtok_r(NULL, TOKENIZER_STRING, &tok);
		}

		if (state->cwd_length == COPY_WHEN_ABSOLUTE(state->cwd)) {
			state->cwd = (char *) realloc(state->cwd, state->cwd_length+1+1);
			state->cwd[state->cwd_length] = DEFAULT_SLASH;
			state->cwd[state->cwd_length+1] = '\0';
			state->cwd_length++;
		}
	} else {
		state->cwd = (char *) realloc(state->cwd, path_length+1);
		memcpy(state->cwd, path, path_length+1);
		state->cwd_length = path_length;
	}

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#ifdef TSRM_WIN32
	if (new_path) {
		free(new_path);
	}
#endif
	free(free_path);
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#ifdef REALPATH_CACHE
	if (use_realpath && CWDG(realpath_cache_size_limit)) {
		realpath_cache_add(orig_path, orig_path_len, state->cwd, state->cwd_length, t TSRMLS_CC);
	}
#endif
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	if (verify_path && verify_path(state)) {
		CWD_STATE_FREE(state);
		*state = old_state;
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		ret = 1;
	} else {
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		CWD_STATE_FREE(&old_state);
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		ret = 0;
	}
	
#if VIRTUAL_CWD_DEBUG
	fprintf (stderr, "virtual_file_ex() = %s\n",state->cwd);
#endif
	return (ret);
}

CWD_API int virtual_chdir(const char *path TSRMLS_DC)
{
	return virtual_file_ex(&CWDG(cwd), path, php_is_dir_ok, 1)?-1:0;
}

CWD_API int virtual_chdir_file(const char *path, int (*p_chdir)(const char *path TSRMLS_DC) TSRMLS_DC)
{
	int length = strlen(path);
	char *temp;
	int retval;

	if (length == 0) {
		return 1; /* Can't cd to empty string */
	}	
	while(--length >= 0 && !IS_SLASH(path[length])) {
	}

	if (length == -1) {
		/* No directory only file name */
		errno = ENOENT;
		return -1;
	}

	if (length == COPY_WHEN_ABSOLUTE(path) && IS_ABSOLUTE_PATH(path, length+1)) { /* Also use trailing slash if this is absolute */
		length++;
	}
	temp = (char *) tsrm_do_alloca(length+1);
	memcpy(temp, path, length);
	temp[length] = 0;
#if VIRTUAL_CWD_DEBUG
	fprintf (stderr, "Changing directory to %s\n", temp);
#endif
	retval = p_chdir(temp TSRMLS_CC);
	tsrm_free_alloca(temp);
	return retval;
}

CWD_API char *virtual_realpath(const char *path, char *real_path TSRMLS_DC)
{
	cwd_state new_state;
	char *retval;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	
	if (virtual_file_ex(&new_state, path, NULL, 1)==0) {
		int len = new_state.cwd_length>MAXPATHLEN-1?MAXPATHLEN-1:new_state.cwd_length;

		memcpy(real_path, new_state.cwd, len);
		real_path[len] = '\0';
		retval = real_path;
	} else {
		retval = NULL;
	}

	CWD_STATE_FREE(&new_state);

	return retval;
}

CWD_API int virtual_filepath_ex(const char *path, char **filepath, verify_path_func verify_path TSRMLS_DC)
{
	cwd_state new_state;
	int retval;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	retval = virtual_file_ex(&new_state, path, verify_path, 1);

	*filepath = new_state.cwd;

	return retval;

}

CWD_API int virtual_filepath(const char *path, char **filepath TSRMLS_DC)
{
	return virtual_filepath_ex(path, filepath, php_is_file_ok TSRMLS_CC);
}

CWD_API FILE *virtual_fopen(const char *path, const char *mode TSRMLS_DC)
{
	cwd_state new_state;
	FILE *f;

	if (path[0] == '\0') { /* Fail to open empty path */
		return NULL;
	}

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, path, NULL, 1);

	f = fopen(new_state.cwd, mode);

	CWD_STATE_FREE(&new_state);
	return f;
}

CWD_API int virtual_access(const char *pathname, int mode TSRMLS_DC)
{
	cwd_state new_state;
	int ret;
	
	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, pathname, NULL, 1);

#if defined(TSRM_WIN32)
	ret = tsrm_win32_access(new_state.cwd, mode);
#else
	ret = access(new_state.cwd, mode);
#endif
	
	CWD_STATE_FREE(&new_state);
	
	return ret;
}


#if HAVE_UTIME
CWD_API int virtual_utime(const char *filename, struct utimbuf *buf TSRMLS_DC)
{
	cwd_state new_state;
	int ret;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, filename, NULL, 0);

	ret = utime(new_state.cwd, buf);

	CWD_STATE_FREE(&new_state);
	return ret;
}
#endif

CWD_API int virtual_chmod(const char *filename, mode_t mode TSRMLS_DC)
{
	cwd_state new_state;
	int ret;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, filename, NULL, 1);

	ret = chmod(new_state.cwd, mode);

	CWD_STATE_FREE(&new_state);
	return ret;
}

#if !defined(TSRM_WIN32) && !defined(NETWARE)
CWD_API int virtual_chown(const char *filename, uid_t owner, gid_t group TSRMLS_DC)
{
	cwd_state new_state;
	int ret;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, filename, NULL, 0);

	ret = chown(new_state.cwd, owner, group);

	CWD_STATE_FREE(&new_state);
	return ret;
}
#endif

CWD_API int virtual_open(const char *path TSRMLS_DC, int flags, ...)
{
	cwd_state new_state;
	int f;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, path, NULL, 1);

	if (flags & O_CREAT) {
		mode_t mode;
		va_list arg;

		va_start(arg, flags);
		mode = (mode_t) va_arg(arg, int);
		va_end(arg);

		f = open(new_state.cwd, flags, mode);
	} else {
		f = open(new_state.cwd, flags);
	}	
	CWD_STATE_FREE(&new_state);
	return f;
}

CWD_API int virtual_creat(const char *path, mode_t mode TSRMLS_DC)
{
	cwd_state new_state;
	int f;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, path, NULL, 1);

	f = creat(new_state.cwd,  mode);

	CWD_STATE_FREE(&new_state);
	return f;
}

CWD_API int virtual_rename(char *oldname, char *newname TSRMLS_DC)
{
	cwd_state old_state;
	cwd_state new_state;
	int retval;

	CWD_STATE_COPY(&old_state, &CWDG(cwd));
	virtual_file_ex(&old_state, oldname, NULL, 0);
	oldname = old_state.cwd;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, newname, NULL, 0);
	newname = new_state.cwd;
 
	retval = rename(oldname, newname);

	CWD_STATE_FREE(&old_state);
	CWD_STATE_FREE(&new_state);

	return retval;
}

CWD_API int virtual_stat(const char *path, struct stat *buf TSRMLS_DC)
{
	cwd_state new_state;
	int retval;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, path, NULL, 1);

	retval = stat(new_state.cwd, buf);

	CWD_STATE_FREE(&new_state);
	return retval;
}

867
#if !defined(TSRM_WIN32)
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CWD_API int virtual_lstat(const char *path, struct stat *buf TSRMLS_DC)
{
	cwd_state new_state;
	int retval;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, path, NULL, 0);

	retval = lstat(new_state.cwd, buf);

	CWD_STATE_FREE(&new_state);
	return retval;
}
#endif

CWD_API int virtual_unlink(const char *path TSRMLS_DC)
{
	cwd_state new_state;
	int retval;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, path, NULL, 0);

	retval = unlink(new_state.cwd);

	CWD_STATE_FREE(&new_state);
	return retval;
}

CWD_API int virtual_mkdir(const char *pathname, mode_t mode TSRMLS_DC)
{
	cwd_state new_state;
	int retval;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, pathname, NULL, 1);

#ifdef TSRM_WIN32
	retval = mkdir(new_state.cwd);
#else
	retval = mkdir(new_state.cwd, mode);
#endif
	CWD_STATE_FREE(&new_state);
	return retval;
}

CWD_API int virtual_rmdir(const char *pathname TSRMLS_DC)
{
	cwd_state new_state;
	int retval;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, pathname, NULL, 0);

	retval = rmdir(new_state.cwd);

	CWD_STATE_FREE(&new_state);
	return retval;
}

#ifdef TSRM_WIN32
DIR *opendir(const char *name);
#endif

CWD_API DIR *virtual_opendir(const char *pathname TSRMLS_DC)
{
	cwd_state new_state;
	DIR *retval;

	CWD_STATE_COPY(&new_state, &CWDG(cwd));
	virtual_file_ex(&new_state, pathname, NULL, 1);

	retval = opendir(new_state.cwd);

	CWD_STATE_FREE(&new_state);
	return retval;
}

#ifdef TSRM_WIN32

CWD_API FILE *virtual_popen(const char *command, const char *type TSRMLS_DC)
{
	return popen_ex(command, type, CWDG(cwd).cwd, NULL);
}

#elif defined(NETWARE)

/* On NetWare, the trick of prepending "cd cwd; " doesn't work so we need to perform
   a VCWD_CHDIR() and mutex it
 */
CWD_API FILE *virtual_popen(const char *command, const char *type TSRMLS_DC)
{
	char prev_cwd[MAXPATHLEN];
	char *getcwd_result;
	FILE *retval;

	getcwd_result = VCWD_GETCWD(prev_cwd, MAXPATHLEN);
	if (!getcwd_result) {
		return NULL;
	}

#ifdef ZTS
	tsrm_mutex_lock(cwd_mutex);
#endif

	VCWD_CHDIR(CWDG(cwd).cwd);
	retval = popen(command, type);
	VCWD_CHDIR(prev_cwd);

#ifdef ZTS
	tsrm_mutex_unlock(cwd_mutex);
#endif

	return retval;
}

#else /* Unix */

CWD_API FILE *virtual_popen(const char *command, const char *type TSRMLS_DC)
{
	int command_length;
	int dir_length, extra = 0;
	char *command_line;
	char *ptr, *dir;
	FILE *retval;

	command_length = strlen(command);

	dir_length = CWDG(cwd).cwd_length;
	dir = CWDG(cwd).cwd;
	while (dir_length > 0) {
		if (*dir == '\'') extra+=3;
		dir++;
		dir_length--;
	}
	dir_length = CWDG(cwd).cwd_length;
	dir = CWDG(cwd).cwd;

1006
	ptr = command_line = (char *) malloc(command_length + sizeof("cd '' ; ") + dir_length + extra+1+1);
1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
	if (!command_line) {
		return NULL;
	}
	memcpy(ptr, "cd ", sizeof("cd ")-1);
	ptr += sizeof("cd ")-1;

	if (CWDG(cwd).cwd_length == 0) {
		*ptr++ = DEFAULT_SLASH;
	} else {
		*ptr++ = '\'';
		while (dir_length > 0) {
			switch (*dir) {
			case '\'':
				*ptr++ = '\'';
				*ptr++ = '\\';
				*ptr++ = '\'';
				/* fall-through */
			default:
				*ptr++ = *dir;
			}
			dir++;
			dir_length--;
		}
		*ptr++ = '\'';
	}
	
	*ptr++ = ' ';
	*ptr++ = ';';
	*ptr++ = ' ';

	memcpy(ptr, command, command_length+1);
	retval = popen(command_line, type);

	free(command_line);
	return retval;
}

#endif


/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 */