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tsrm_virtual_cwd.c
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tsrm_virtual_cwd.c
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2010 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 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_01.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> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#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>
#include <time.h>
#include "tsrm_virtual_cwd.h"
#include "tsrm_strtok_r.h"
#ifdef TSRM_WIN32
#include <io.h>
#include "tsrm_win32.h"
#endif
#ifdef NETWARE
#include <fsio.h>
#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
ts_rsrc_id cwd_globals_id;
#else
virtual_cwd_globals cwd_globals;
#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);
#ifdef TSRM_WIN32
CWD_API int php_sys_stat(const char *path, struct stat *buf) /* {{{ */
{
WIN32_FILE_ATTRIBUTE_DATA data;
__int64 t;
if (!GetFileAttributesEx(path, GetFileExInfoStandard, &data)) {
return stat(path, buf);
}
if (path[1] == ':') {
if (path[0] >= 'A' && path[0] <= 'Z') {
buf->st_dev = buf->st_rdev = path[0] - 'A';
} else {
buf->st_dev = buf->st_rdev = path[0] - 'a';
}
} else {
char cur_path[MAXPATHLEN+1];
DWORD len = sizeof(cur_path);
char *tmp = cur_path;
while(1) {
DWORD r = GetCurrentDirectory(len, tmp);
if (r < len) {
if (tmp[1] == ':') {
if (path[0] >= 'A' && path[0] <= 'Z') {
buf->st_dev = buf->st_rdev = path[0] - 'A';
} else {
buf->st_dev = buf->st_rdev = path[0] - 'a';
}
} else {
buf->st_dev = buf->st_rdev = -1;
}
break;
} else if (!r) {
buf->st_dev = buf->st_rdev = -1;
break;
} else {
len = r+1;
tmp = (char*)malloc(len);
}
}
if (tmp != cur_path) {
free(tmp);
}
}
buf->st_uid = buf->st_gid = buf->st_ino = 0;
buf->st_mode = (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? (S_IFDIR|S_IEXEC|(S_IEXEC>>3)|(S_IEXEC>>6)) : S_IFREG;
buf->st_mode |= (data.dwFileAttributes & FILE_ATTRIBUTE_READONLY) ? (S_IREAD|(S_IREAD>>3)|(S_IREAD>>6)) : (S_IREAD|(S_IREAD>>3)|(S_IREAD>>6)|S_IWRITE|(S_IWRITE>>3)|(S_IWRITE>>6));
if ((data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0) {
int len = strlen(path);
if (path[len-4] == '.') {
if (_memicmp(path+len-3, "exe", 3) == 0 ||
_memicmp(path+len-3, "com", 3) == 0 ||
_memicmp(path+len-3, "bat", 3) == 0 ||
_memicmp(path+len-3, "cmd", 3) == 0) {
buf->st_mode |= (S_IEXEC|(S_IEXEC>>3)|(S_IEXEC>>6));
}
}
}
buf->st_nlink = 1;
t = data.nFileSizeHigh;
t = t << 32;
t |= data.nFileSizeLow;
buf->st_size = t;
t = data.ftLastAccessTime.dwHighDateTime;
t = t << 32;
t |= data.ftLastAccessTime.dwLowDateTime;
buf->st_atime = (unsigned long)((t / 10000000) - 11644473600);
t = data.ftCreationTime.dwHighDateTime;
t = t << 32;
t |= data.ftCreationTime.dwLowDateTime;
buf->st_ctime = (unsigned long)((t / 10000000) - 11644473600);
t = data.ftLastWriteTime.dwHighDateTime;
t = t << 32;
t |= data.ftLastWriteTime.dwLowDateTime;
buf->st_mtime = (unsigned long)((t / 10000000) - 11644473600);
return 0;
}
/* }}} */
#endif
static int php_is_dir_ok(const cwd_state *state) /* {{{ */
{
struct stat buf;
if (php_sys_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 (php_sys_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);
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));
}
/* }}} */
static void cwd_globals_dtor(virtual_cwd_globals *cwd_globals TSRMLS_DC) /* {{{ */
{
CWD_STATE_FREE(&cwd_globals->cwd);
realpath_cache_clean(TSRMLS_C);
}
/* }}} */
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;
#ifdef NETWARE
result = getcwdpath(cwd, NULL, 1);
if(result)
{
char *c=cwd;
while(c = strchr(c, '\\'))
{
*c='/';
++c;
}
}
#else
result = getcwd(cwd, sizeof(cwd));
#endif
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;
}
/* }}} */
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;
}
/* }}} */
CWD_API void realpath_cache_clean(TSRMLS_D) /* {{{ */
{
int i;
for (i = 0; i < sizeof(CWDG(realpath_cache))/sizeof(CWDG(realpath_cache)[0]); i++) {
realpath_cache_bucket *p = CWDG(realpath_cache)[i];
while (p != NULL) {
realpath_cache_bucket *r = p;
p = p->next;
free(r);
}
CWDG(realpath_cache)[i] = NULL;
}
CWDG(realpath_cache_size) = 0;
}
/* }}} */
CWD_API void realpath_cache_del(const char *path, int path_len 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 (key == (*bucket)->key && path_len == (*bucket)->path_len &&
memcmp(path, (*bucket)->path, path_len) == 0) {
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);
return;
} else {
bucket = &(*bucket)->next;
}
}
}
/* }}} */
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;
}
/* }}} */
/* 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);
cwd_state old_state;
char orig_path[MAXPATHLEN];
realpath_cache_bucket *bucket;
time_t t = 0;
int ret;
int use_cache;
int use_relative_path = 0;
#ifdef TSRM_WIN32
int is_unc;
int exists;
#endif
TSRMLS_FETCH();
use_cache = ((use_realpath != CWD_EXPAND) && CWDG(realpath_cache_size_limit));
if (path_length == 0)
return (1);
if (path_length >= MAXPATHLEN)
return (1);
#if VIRTUAL_CWD_DEBUG
fprintf(stderr,"cwd = %s path = %s\n", state->cwd, path);
#endif
/* 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)) {
if (state->cwd_length == 0) {
use_cache = 0;
use_relative_path = 1;
} else {
int orig_path_len;
int state_cwd_length = state->cwd_length;
#ifdef TSRM_WIN32
if (IS_SLASH(path[0])) {
state_cwd_length = 2;
}
#endif
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);
path = orig_path;
path_length = orig_path_len;
}
}
if (use_cache) {
t = CWDG(realpath_cache_ttl)?time(0):0;
if ((bucket = realpath_cache_find(path, path_length, 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;
}
}
}
if (use_realpath != CWD_EXPAND) {
#if !defined(TSRM_WIN32) && !defined(NETWARE)
char resolved_path[MAXPATHLEN];
if (!realpath(path, resolved_path)) { /* Note: Not threadsafe on older *BSD's */
if (use_realpath == CWD_REALPATH) {
return 1;
}
goto no_realpath;
}
use_realpath = CWD_REALPATH;
CWD_STATE_COPY(&old_state, state);
state->cwd_length = strlen(resolved_path);
state->cwd = (char *) realloc(state->cwd, state->cwd_length+1);
memcpy(state->cwd, resolved_path, state->cwd_length+1);
#else
goto no_realpath;
#endif
} else {
char *ptr, *path_copy, *free_path;
char *tok;
int ptr_length;
no_realpath:
#ifdef TSRM_WIN32
if (memchr(path, '*', path_length) ||
memchr(path, '?', path_length)) {
return 1;
}
#endif
free_path = path_copy = tsrm_strndup(path, path_length);
CWD_STATE_COPY(&old_state, state);
#ifdef TSRM_WIN32
exists = (use_realpath != CWD_EXPAND);
ret = 0;
is_unc = 0;
if (path_length >= 2 && path[1] == ':') {
state->cwd = (char *) realloc(state->cwd, 2 + 1);
state->cwd[0] = toupper(path[0]);
state->cwd[1] = ':';
state->cwd[2] = '\0';
state->cwd_length = 2;
path_copy += 2;
} else if (IS_UNC_PATH(path, path_length)) {
state->cwd = (char *) realloc(state->cwd, 1 + 1);
state->cwd[0] = DEFAULT_SLASH;
state->cwd[1] = '\0';
state->cwd_length = 1;
path_copy += 2;
is_unc = 2;
} else {
#endif
state->cwd = (char *) realloc(state->cwd, 1);
state->cwd[0] = '\0';
state->cwd_length = 0;
#ifdef TSRM_WIN32
}
#endif
tok = NULL;
ptr = tsrm_strtok_r(path_copy, TOKENIZER_STRING, &tok);
while (ptr) {
ptr_length = strlen(ptr);
if (IS_DIRECTORY_UP(ptr, ptr_length)) {
char save;
if (use_relative_path) {
CWD_STATE_FREE(state);
*state = old_state;
return 1;
}
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)) {
if (use_relative_path) {
state->cwd = (char *) realloc(state->cwd, state->cwd_length+ptr_length+1);
use_relative_path = 0;
} else {
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_length < 2 ||
(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)
/*
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,
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)) {
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);
#ifdef TSRM_WIN32
if (use_realpath != CWD_EXPAND) {
WIN32_FIND_DATA data;
HANDLE hFind;
if ((hFind = FindFirstFile(state->cwd, &data)) != INVALID_HANDLE_VALUE) {
int length = strlen(data.cFileName);
if (length != ptr_length) {
state->cwd = (char *) realloc(state->cwd, state->cwd_length+length+1);
}
memcpy(&state->cwd[state->cwd_length], data.cFileName, length+1);
ptr_length = length;
FindClose(hFind);
ret = 0;
} else {
if (is_unc) {
/* skip share name */
is_unc--;
ret = 0;
} else {
exists = 0;
if (use_realpath == CWD_REALPATH) {
ret = 1;
}
}
}
}
#endif
state->cwd_length += ptr_length;
}
ptr = tsrm_strtok_r(NULL, TOKENIZER_STRING, &tok);
}
free(free_path);
if (use_realpath == CWD_REALPATH) {
if (ret) {
CWD_STATE_FREE(state);
*state = old_state;
return 1;
}
} else {
#if defined(TSRM_WIN32) || defined(NETWARE)
if (path[path_length-1] == '\\' || path[path_length-1] == '/') {
#else
if (path[path_length-1] == '/') {
#endif
state->cwd = (char*)realloc(state->cwd, state->cwd_length + 2);
state->cwd[state->cwd_length++] = DEFAULT_SLASH;
state->cwd[state->cwd_length] = 0;
}
}
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++;
}
}
/* Store existent file in realpath cache. */
#ifdef TSRM_WIN32
if (use_cache && !is_unc && exists) {
#else
if (use_cache && (use_realpath == CWD_REALPATH)) {
#endif
realpath_cache_add(path, path_length, state->cwd, state->cwd_length, t TSRMLS_CC);
}
if (verify_path && verify_path(state)) {
CWD_STATE_FREE(state);
*state = old_state;
ret = 1;
} else {
CWD_STATE_FREE(&old_state);
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, CWD_REALPATH)?-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;
char cwd[MAXPATHLEN];
/* realpath("") returns CWD */
if (!*path) {
new_state.cwd = (char*)malloc(1);
new_state.cwd[0] = '\0';
new_state.cwd_length = 0;
if (VCWD_GETCWD(cwd, MAXPATHLEN)) {
path = cwd;
}
} else if (!IS_ABSOLUTE_PATH(path, strlen(path))) {
CWD_STATE_COPY(&new_state, &CWDG(cwd));
} else {
new_state.cwd = (char*)malloc(1);
new_state.cwd[0] = '\0';
new_state.cwd_length = 0;
}
if (virtual_file_ex(&new_state, path, NULL, CWD_REALPATH)==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, CWD_FILEPATH);
*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));
if (virtual_file_ex(&new_state, path, NULL, CWD_FILEPATH)) {
CWD_STATE_FREE(&new_state);
return NULL;
}
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));
if (virtual_file_ex(&new_state, pathname, NULL, CWD_REALPATH)) {
CWD_STATE_FREE(&new_state);
return -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));
if (virtual_file_ex(&new_state, filename, NULL, CWD_REALPATH)) {
CWD_STATE_FREE(&new_state);
return -1;
}
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));
if (virtual_file_ex(&new_state, filename, NULL, CWD_REALPATH)) {
CWD_STATE_FREE(&new_state);
return -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, int link TSRMLS_DC) /* {{{ */
{
cwd_state new_state;
int ret;
CWD_STATE_COPY(&new_state, &CWDG(cwd));
if (virtual_file_ex(&new_state, filename, NULL, CWD_REALPATH)) {
CWD_STATE_FREE(&new_state);
return -1;
}
if (link) {
#if HAVE_LCHOWN
ret = lchown(new_state.cwd, owner, group);
#else
ret = -1;
#endif
} else {
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));
if (virtual_file_ex(&new_state, path, NULL, CWD_FILEPATH)) {
CWD_STATE_FREE(&new_state);
return -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);