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php-src/ext/phar/dirstream.c

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/*
+----------------------------------------------------------------------+
| phar:// stream wrapper support |
+----------------------------------------------------------------------+
| Copyright (c) 2005-2009 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: Gregory Beaver <cellog@php.net> |
| Marcus Boerger <helly@php.net> |
+----------------------------------------------------------------------+
*/
#define PHAR_DIRSTREAM 1
#include "phar_internal.h"
#include "dirstream.h"
BEGIN_EXTERN_C()
void phar_dostat(phar_archive_data *phar, phar_entry_info *data, php_stream_statbuf *ssb, zend_bool is_dir TSRMLS_DC);
END_EXTERN_C()
php_stream_ops phar_dir_ops = {
phar_dir_write, /* write */
phar_dir_read, /* read */
phar_dir_close, /* close */
phar_dir_flush, /* flush */
"phar dir",
phar_dir_seek, /* seek */
NULL, /* cast */
NULL, /* stat */
NULL, /* set option */
};
/**
* Used for closedir($fp) where $fp is an opendir('phar://...') directory handle
*/
static int phar_dir_close(php_stream *stream, int close_handle TSRMLS_DC) /* {{{ */
{
HashTable *data = (HashTable *)stream->abstract;
if (data && data->arBuckets) {
zend_hash_destroy(data);
data->arBuckets = 0;
FREE_HASHTABLE(data);
stream->abstract = NULL;
}
return 0;
}
/* }}} */
/**
* Used for seeking on a phar directory handle
*/
static int phar_dir_seek(php_stream *stream, off_t offset, int whence, off_t *newoffset TSRMLS_DC) /* {{{ */
{
HashTable *data = (HashTable *)stream->abstract;
if (!data) {
return -1;
}
if (whence == SEEK_END) {
whence = SEEK_SET;
offset = zend_hash_num_elements(data) + offset;
}
if (whence == SEEK_SET) {
zend_hash_internal_pointer_reset(data);
}
if (offset < 0) {
return -1;
} else {
*newoffset = 0;
while (*newoffset < offset && zend_hash_move_forward(data) == SUCCESS) {
++(*newoffset);
}
return 0;
}
}
/* }}} */
/**
* Used for readdir() on an opendir()ed phar directory handle
*/
static size_t phar_dir_read(php_stream *stream, char *buf, size_t count TSRMLS_DC) /* {{{ */
{
size_t to_read;
HashTable *data = (HashTable *)stream->abstract;
phar_zstr key;
char *str_key;
uint keylen;
ulong unused;
if (FAILURE == zend_hash_has_more_elements(data)) {
return 0;
}
if (HASH_KEY_NON_EXISTANT == zend_hash_get_current_key_ex(data, &key, &keylen, &unused, 0, NULL)) {
return 0;
}
PHAR_STR(key, str_key);
zend_hash_move_forward(data);
to_read = MIN(keylen, count);
if (to_read == 0 || count < keylen) {
PHAR_STR_FREE(str_key);
return 0;
}
memset(buf, 0, sizeof(php_stream_dirent));
memcpy(((php_stream_dirent *) buf)->d_name, str_key, to_read);
PHAR_STR_FREE(str_key);
((php_stream_dirent *) buf)->d_name[to_read + 1] = '\0';
return sizeof(php_stream_dirent);
}
/* }}} */
/**
* Dummy: Used for writing to a phar directory (i.e. not used)
*/
static size_t phar_dir_write(php_stream *stream, const char *buf, size_t count TSRMLS_DC) /* {{{ */
{
return 0;
}
/* }}} */
/**
* Dummy: Used for flushing writes to a phar directory (i.e. not used)
*/
static int phar_dir_flush(php_stream *stream TSRMLS_DC) /* {{{ */
{
return EOF;
}
/* }}} */
/**
* add an empty element with a char * key to a hash table, avoiding duplicates
*
* This is used to get a unique listing of virtual directories within a phar,
* for iterating over opendir()ed phar directories.
*/
static int phar_add_empty(HashTable *ht, char *arKey, uint nKeyLength) /* {{{ */
{
void *dummy = (char *) 1;
return zend_hash_update(ht, arKey, nKeyLength, (void *) &dummy, sizeof(void *), NULL);
}
/* }}} */
/**
* Used for sorting directories alphabetically
*/
static int phar_compare_dir_name(const void *a, const void *b TSRMLS_DC) /* {{{ */
{
Bucket *f;
Bucket *s;
int result;
f = *((Bucket **) a);
s = *((Bucket **) b);
#if (PHP_MAJOR_VERSION < 6)
result = zend_binary_strcmp(f->arKey, f->nKeyLength, s->arKey, s->nKeyLength);
#else
result = zend_binary_strcmp(f->key.arKey.s, f->nKeyLength, s->key.arKey.s, s->nKeyLength);
#endif
if (result < 0) {
return -1;
} else if (result > 0) {
return 1;
} else {
return 0;
}
}
/* }}} */
/**
* Create a opendir() directory stream handle by iterating over each of the
* files in a phar and retrieving its relative path. From this, construct
* a list of files/directories that are "in" the directory represented by dir
*/
static php_stream *phar_make_dirstream(char *dir, HashTable *manifest TSRMLS_DC) /* {{{ */
{
HashTable *data;
int dirlen = strlen(dir);
phar_zstr key;
char *entry, *found, *save, *str_key;
uint keylen;
ulong unused;
ALLOC_HASHTABLE(data);
zend_hash_init(data, 64, zend_get_hash_value, NULL, 0);
if ((*dir == '/' && dirlen == 1 && (manifest->nNumOfElements == 0)) || (dirlen >= sizeof(".phar")-1 && !memcmp(dir, ".phar", sizeof(".phar")-1))) {
/* make empty root directory for empty phar */
/* make empty directory for .phar magic directory */
efree(dir);
return php_stream_alloc(&phar_dir_ops, data, NULL, "r");
}
zend_hash_internal_pointer_reset(manifest);
while (FAILURE != zend_hash_has_more_elements(manifest)) {
if (HASH_KEY_NON_EXISTANT == zend_hash_get_current_key_ex(manifest, &key, &keylen, &unused, 0, NULL)) {
break;
}
PHAR_STR(key, str_key);
if (keylen <= (uint)dirlen) {
if (keylen < (uint)dirlen || !strncmp(str_key, dir, dirlen)) {
PHAR_STR_FREE(str_key);
if (SUCCESS != zend_hash_move_forward(manifest)) {
break;
}
continue;
}
}
if (*dir == '/') {
/* root directory */
if (keylen >= sizeof(".phar")-1 && !memcmp(str_key, ".phar", sizeof(".phar")-1)) {
PHAR_STR_FREE(str_key);
/* do not add any magic entries to this directory */
if (SUCCESS != zend_hash_move_forward(manifest)) {
break;
}
continue;
}
if (NULL != (found = (char *) memchr(str_key, '/', keylen))) {
/* the entry has a path separator and is a subdirectory */
entry = (char *) safe_emalloc(found - str_key, 1, 1);
memcpy(entry, str_key, found - str_key);
keylen = found - str_key;
entry[keylen] = '\0';
} else {
entry = (char *) safe_emalloc(keylen, 1, 1);
memcpy(entry, str_key, keylen);
entry[keylen] = '\0';
}
PHAR_STR_FREE(str_key);
goto PHAR_ADD_ENTRY;
} else {
if (0 != memcmp(str_key, dir, dirlen)) {
/* entry in directory not found */
PHAR_STR_FREE(str_key);
if (SUCCESS != zend_hash_move_forward(manifest)) {
break;
}
continue;
} else {
if (str_key[dirlen] != '/') {
PHAR_STR_FREE(str_key);
if (SUCCESS != zend_hash_move_forward(manifest)) {
break;
}
continue;
}
}
}
save = str_key;
save += dirlen + 1; /* seek to just past the path separator */
if (NULL != (found = (char *) memchr(save, '/', keylen - dirlen - 1))) {
/* is subdirectory */
save -= dirlen + 1;
entry = (char *) safe_emalloc(found - save + dirlen, 1, 1);
memcpy(entry, save + dirlen + 1, found - save - dirlen - 1);
keylen = found - save - dirlen - 1;
entry[keylen] = '\0';
} else {
/* is file */
save -= dirlen + 1;
entry = (char *) safe_emalloc(keylen - dirlen, 1, 1);
memcpy(entry, save + dirlen + 1, keylen - dirlen - 1);
entry[keylen - dirlen - 1] = '\0';
keylen = keylen - dirlen - 1;
}
PHAR_STR_FREE(str_key);
PHAR_ADD_ENTRY:
if (keylen) {
phar_add_empty(data, entry, keylen);
}
efree(entry);
if (SUCCESS != zend_hash_move_forward(manifest)) {
break;
}
}
if (FAILURE != zend_hash_has_more_elements(data)) {
efree(dir);
if (zend_hash_sort(data, zend_qsort, phar_compare_dir_name, 0 TSRMLS_CC) == FAILURE) {
FREE_HASHTABLE(data);
return NULL;
}
return php_stream_alloc(&phar_dir_ops, data, NULL, "r");
} else {
efree(dir);
return php_stream_alloc(&phar_dir_ops, data, NULL, "r");
}
}
/* }}}*/
/**
* Open a directory handle within a phar archive
*/
php_stream *phar_wrapper_open_dir(php_stream_wrapper *wrapper, char *path, char *mode, int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC) /* {{{ */
{
php_url *resource = NULL;
php_stream *ret;
char *internal_file, *error, *str_key;
phar_zstr key;
uint keylen;
ulong unused;
phar_archive_data *phar;
phar_entry_info *entry = NULL;
uint host_len;
if ((resource = phar_parse_url(wrapper, path, mode, options TSRMLS_CC)) == NULL) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar url \"%s\" is unknown", path);
return NULL;
}
/* we must have at the very least phar://alias.phar/ */
if (!resource->scheme || !resource->host || !resource->path) {
if (resource->host && !resource->path) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: no directory in \"%s\", must have at least phar://%s/ for root directory (always use full path to a new phar)", path, resource->host);
php_url_free(resource);
return NULL;
}
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: invalid url \"%s\", must have at least phar://%s/", path, path);
return NULL;
}
if (strcasecmp("phar", resource->scheme)) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: not a phar url \"%s\"", path);
return NULL;
}
host_len = strlen(resource->host);
phar_request_initialize(TSRMLS_C);
internal_file = resource->path + 1; /* strip leading "/" */
if (FAILURE == phar_get_archive(&phar, resource->host, host_len, NULL, 0, &error TSRMLS_CC)) {
if (error) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "%s", error);
efree(error);
} else {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar file \"%s\" is unknown", resource->host);
}
php_url_free(resource);
return NULL;
}
if (error) {
efree(error);
}
if (*internal_file == '\0') {
/* root directory requested */
internal_file = estrndup(internal_file - 1, 1);
ret = phar_make_dirstream(internal_file, &phar->manifest TSRMLS_CC);
php_url_free(resource);
return ret;
}
if (!phar->manifest.arBuckets) {
php_url_free(resource);
return NULL;
}
if (SUCCESS == zend_hash_find(&phar->manifest, internal_file, strlen(internal_file), (void**)&entry) && !entry->is_dir) {
php_url_free(resource);
return NULL;
} else if (entry && entry->is_dir) {
if (entry->is_mounted) {
php_url_free(resource);
return php_stream_opendir(entry->tmp, options, context);
}
internal_file = estrdup(internal_file);
php_url_free(resource);
return phar_make_dirstream(internal_file, &phar->manifest TSRMLS_CC);
} else {
int i_len = strlen(internal_file);
/* search for directory */
zend_hash_internal_pointer_reset(&phar->manifest);
while (FAILURE != zend_hash_has_more_elements(&phar->manifest)) {
if (HASH_KEY_NON_EXISTANT !=
zend_hash_get_current_key_ex(
&phar->manifest, &key, &keylen, &unused, 0, NULL)) {
PHAR_STR(key, str_key);
if (keylen > (uint)i_len && 0 == memcmp(str_key, internal_file, i_len)) {
PHAR_STR_FREE(str_key);
/* directory found */
internal_file = estrndup(internal_file,
i_len);
php_url_free(resource);
return phar_make_dirstream(internal_file, &phar->manifest TSRMLS_CC);
}
PHAR_STR_FREE(str_key);
}
if (SUCCESS != zend_hash_move_forward(&phar->manifest)) {
break;
}
}
}
php_url_free(resource);
return NULL;
}
/* }}} */
/**
* Make a new directory within a phar archive
*/
int phar_wrapper_mkdir(php_stream_wrapper *wrapper, char *url_from, int mode, int options, php_stream_context *context TSRMLS_DC) /* {{{ */
{
phar_entry_info entry, *e;
phar_archive_data *phar = NULL;
char *error, *arch, *entry2;
int arch_len, entry_len;
php_url *resource = NULL;
uint host_len;
/* pre-readonly check, we need to know if this is a data phar */
if (FAILURE == phar_split_fname(url_from, strlen(url_from), &arch, &arch_len, &entry2, &entry_len, 2, 2 TSRMLS_CC)) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\", no phar archive specified", url_from);
return 0;
}
if (FAILURE == phar_get_archive(&phar, arch, arch_len, NULL, 0, NULL TSRMLS_CC)) {
phar = NULL;
}
efree(arch);
efree(entry2);
if (PHAR_G(readonly) && (!phar || !phar->is_data)) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\", write operations disabled", url_from);
return 0;
}
if ((resource = phar_parse_url(wrapper, url_from, "w", options TSRMLS_CC)) == NULL) {
return 0;
}
/* we must have at the very least phar://alias.phar/internalfile.php */
if (!resource->scheme || !resource->host || !resource->path) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: invalid url \"%s\"", url_from);
return 0;
}
if (strcasecmp("phar", resource->scheme)) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: not a phar stream url \"%s\"", url_from);
return 0;
}
host_len = strlen(resource->host);
if (FAILURE == phar_get_archive(&phar, resource->host, host_len, NULL, 0, &error TSRMLS_CC)) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\" in phar \"%s\", error retrieving phar information: %s", resource->path+1, resource->host, error);
efree(error);
php_url_free(resource);
return 0;
}
if ((e = phar_get_entry_info_dir(phar, resource->path + 1, strlen(resource->path + 1), 2, &error, 1 TSRMLS_CC))) {
/* directory exists, or is a subdirectory of an existing file */
if (e->is_temp_dir) {
efree(e->filename);
efree(e);
}
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\" in phar \"%s\", directory already exists", resource->path+1, resource->host);
php_url_free(resource);
return 0;
}
if (error) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\" in phar \"%s\", %s", resource->path+1, resource->host, error);
efree(error);
php_url_free(resource);
return 0;
}
if ((e = phar_get_entry_info_dir(phar, resource->path + 1, strlen(resource->path + 1), 0, &error, 1 TSRMLS_CC))) {
/* entry exists as a file */
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\" in phar \"%s\", file already exists", resource->path+1, resource->host);
php_url_free(resource);
return 0;
}
if (error) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\" in phar \"%s\", %s", resource->path+1, resource->host, error);
efree(error);
php_url_free(resource);
return 0;
}
memset((void *) &entry, 0, sizeof(phar_entry_info));
/* strip leading "/" */
if (phar->is_zip) {
entry.is_zip = 1;
}
entry.filename = estrdup(resource->path + 1);
if (phar->is_tar) {
entry.is_tar = 1;
entry.tar_type = TAR_DIR;
}
entry.filename_len = strlen(resource->path + 1);
php_url_free(resource);
entry.is_dir = 1;
entry.phar = phar;
entry.is_modified = 1;
entry.is_crc_checked = 1;
entry.flags = PHAR_ENT_PERM_DEF_DIR;
entry.old_flags = PHAR_ENT_PERM_DEF_DIR;
if (SUCCESS != zend_hash_add(&phar->manifest, entry.filename, entry.filename_len, (void*)&entry, sizeof(phar_entry_info), NULL)) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\" in phar \"%s\", adding to manifest failed", entry.filename, phar->fname);
efree(error);
efree(entry.filename);
return 0;
}
phar_flush(phar, 0, 0, 0, &error TSRMLS_CC);
if (error) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot create directory \"%s\" in phar \"%s\", %s", entry.filename, phar->fname, error);
zend_hash_del(&phar->manifest, entry.filename, entry.filename_len);
efree(error);
return 0;
}
phar_add_virtual_dirs(phar, entry.filename, entry.filename_len TSRMLS_CC);
return 1;
}
/* }}} */
/**
* Remove a directory within a phar archive
*/
int phar_wrapper_rmdir(php_stream_wrapper *wrapper, char *url, int options, php_stream_context *context TSRMLS_DC) /* {{{ */
{
phar_entry_info *entry;
phar_archive_data *phar = NULL;
char *error, *arch, *entry2;
int arch_len, entry_len;
php_url *resource = NULL;
uint host_len;
phar_zstr key;
char *str_key;
uint key_len;
ulong unused;
uint path_len;
/* pre-readonly check, we need to know if this is a data phar */
if (FAILURE == phar_split_fname(url, strlen(url), &arch, &arch_len, &entry2, &entry_len, 2, 2 TSRMLS_CC)) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot remove directory \"%s\", no phar archive specified, or phar archive does not exist", url);
return 0;
}
if (FAILURE == phar_get_archive(&phar, arch, arch_len, NULL, 0, NULL TSRMLS_CC)) {
phar = NULL;
}
efree(arch);
efree(entry2);
if (PHAR_G(readonly) && (!phar || !phar->is_data)) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot rmdir directory \"%s\", write operations disabled", url);
return 0;
}
if ((resource = phar_parse_url(wrapper, url, "w", options TSRMLS_CC)) == NULL) {
return 0;
}
/* we must have at the very least phar://alias.phar/internalfile.php */
if (!resource->scheme || !resource->host || !resource->path) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: invalid url \"%s\"", url);
return 0;
}
if (strcasecmp("phar", resource->scheme)) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: not a phar stream url \"%s\"", url);
return 0;
}
host_len = strlen(resource->host);
if (FAILURE == phar_get_archive(&phar, resource->host, host_len, NULL, 0, &error TSRMLS_CC)) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot remove directory \"%s\" in phar \"%s\", error retrieving phar information: %s", resource->path+1, resource->host, error);
efree(error);
php_url_free(resource);
return 0;
}
path_len = strlen(resource->path+1);
if (!(entry = phar_get_entry_info_dir(phar, resource->path + 1, path_len, 2, &error, 1 TSRMLS_CC))) {
if (error) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot remove directory \"%s\" in phar \"%s\", %s", resource->path+1, resource->host, error);
efree(error);
} else {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot remove directory \"%s\" in phar \"%s\", directory does not exist", resource->path+1, resource->host);
}
php_url_free(resource);
return 0;
}
if (!entry->is_deleted) {
for (zend_hash_internal_pointer_reset(&phar->manifest);
HASH_KEY_NON_EXISTANT != zend_hash_get_current_key_ex(&phar->manifest, &key, &key_len, &unused, 0, NULL);
zend_hash_move_forward(&phar->manifest)) {
PHAR_STR(key, str_key);
if (key_len > path_len &&
memcmp(str_key, resource->path+1, path_len) == 0 &&
IS_SLASH(str_key[path_len])) {
PHAR_STR_FREE(str_key);
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: Directory not empty");
if (entry->is_temp_dir) {
efree(entry->filename);
efree(entry);
}
php_url_free(resource);
return 0;
}
PHAR_STR_FREE(str_key);
}
for (zend_hash_internal_pointer_reset(&phar->virtual_dirs);
HASH_KEY_NON_EXISTANT != zend_hash_get_current_key_ex(&phar->virtual_dirs, &key, &key_len, &unused, 0, NULL);
zend_hash_move_forward(&phar->virtual_dirs)) {
PHAR_STR(key, str_key);
if (key_len > path_len &&
memcmp(str_key, resource->path+1, path_len) == 0 &&
IS_SLASH(str_key[path_len])) {
PHAR_STR_FREE(str_key);
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: Directory not empty");
if (entry->is_temp_dir) {
efree(entry->filename);
efree(entry);
}
php_url_free(resource);
return 0;
}
PHAR_STR_FREE(str_key);
}
}
if (entry->is_temp_dir) {
zend_hash_del(&phar->virtual_dirs, resource->path+1, path_len);
efree(entry->filename);
efree(entry);
} else {
entry->is_deleted = 1;
entry->is_modified = 1;
phar_flush(phar, 0, 0, 0, &error TSRMLS_CC);
if (error) {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "phar error: cannot remove directory \"%s\" in phar \"%s\", %s", entry->filename, phar->fname, error);
php_url_free(resource);
efree(error);
return 0;
}
}
php_url_free(resource);
return 1;
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
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