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file.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) 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: |
| https://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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <[email protected]> |
| Stig Bakken <[email protected]> |
| Andi Gutmans <[email protected]> |
| Zeev Suraski <[email protected]> |
| PHP 4.0 patches by Thies C. Arntzen ([email protected]) |
| PHP streams by Wez Furlong ([email protected]) |
+----------------------------------------------------------------------+
*/
/* {{{ includes */
#include "php.h"
#include "php_globals.h"
#include "ext/standard/flock_compat.h"
#include "ext/standard/exec.h"
#include "ext/standard/php_filestat.h"
#include "php_open_temporary_file.h"
#include "ext/standard/basic_functions.h"
#include "php_ini.h"
#include "zend_smart_str.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <wchar.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef PHP_WIN32
# include <io.h>
# define O_RDONLY _O_RDONLY
# include "win32/param.h"
# include "win32/winutil.h"
# include "win32/fnmatch.h"
# include "win32/ioutil.h"
#else
# if HAVE_SYS_PARAM_H
# include <sys/param.h>
# endif
# if HAVE_SYS_SELECT_H
# include <sys/select.h>
# endif
# include <sys/socket.h>
# include <netinet/in.h>
# include <netdb.h>
# if HAVE_ARPA_INET_H
# include <arpa/inet.h>
# endif
#endif
#include "ext/standard/head.h"
#include "php_string.h"
#include "file.h"
#ifdef HAVE_PWD_H
# ifdef PHP_WIN32
# include "win32/pwd.h"
# else
# include <pwd.h>
# endif
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include "fsock.h"
#include "fopen_wrappers.h"
#include "streamsfuncs.h"
#include "php_globals.h"
#ifdef HAVE_SYS_FILE_H
# include <sys/file.h>
#endif
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#include "scanf.h"
#include "zend_API.h"
#ifdef ZTS
int file_globals_id;
#else
php_file_globals file_globals;
#endif
#if defined(HAVE_FNMATCH) && !defined(PHP_WIN32)
# ifndef _GNU_SOURCE
# define _GNU_SOURCE
# endif
# include <fnmatch.h>
#endif
#include "file_arginfo.h"
/* }}} */
#define PHP_STREAM_FROM_ZVAL(stream, arg) \
ZEND_ASSERT(Z_TYPE_P(arg) == IS_RESOURCE); \
php_stream_from_res(stream, Z_RES_P(arg));
/* {{{ ZTS-stuff / Globals / Prototypes */
/* sharing globals is *evil* */
static int le_stream_context = FAILURE;
PHPAPI int php_le_stream_context(void)
{
return le_stream_context;
}
/* }}} */
/* {{{ Module-Stuff */
static ZEND_RSRC_DTOR_FUNC(file_context_dtor)
{
php_stream_context *context = (php_stream_context*)res->ptr;
if (Z_TYPE(context->options) != IS_UNDEF) {
zval_ptr_dtor(&context->options);
ZVAL_UNDEF(&context->options);
}
php_stream_context_free(context);
}
static void file_globals_ctor(php_file_globals *file_globals_p)
{
memset(file_globals_p, 0, sizeof(php_file_globals));
file_globals_p->def_chunk_size = PHP_SOCK_CHUNK_SIZE;
}
static void file_globals_dtor(php_file_globals *file_globals_p)
{
#if defined(HAVE_GETHOSTBYNAME_R)
if (file_globals_p->tmp_host_buf) {
free(file_globals_p->tmp_host_buf);
}
#endif
}
static PHP_INI_MH(OnUpdateAutoDetectLineEndings)
{
if (zend_ini_parse_bool(new_value)) {
zend_error(E_DEPRECATED, "auto_detect_line_endings is deprecated");
}
return OnUpdateBool(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
}
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("user_agent", NULL, PHP_INI_ALL, OnUpdateString, user_agent, php_file_globals, file_globals)
STD_PHP_INI_ENTRY("from", NULL, PHP_INI_ALL, OnUpdateString, from_address, php_file_globals, file_globals)
STD_PHP_INI_ENTRY("default_socket_timeout", "60", PHP_INI_ALL, OnUpdateLong, default_socket_timeout, php_file_globals, file_globals)
STD_PHP_INI_BOOLEAN("auto_detect_line_endings", "0", PHP_INI_ALL, OnUpdateAutoDetectLineEndings, auto_detect_line_endings, php_file_globals, file_globals)
PHP_INI_END()
PHP_MINIT_FUNCTION(file)
{
le_stream_context = zend_register_list_destructors_ex(file_context_dtor, NULL, "stream-context", module_number);
#ifdef ZTS
ts_allocate_id(&file_globals_id, sizeof(php_file_globals), (ts_allocate_ctor) file_globals_ctor, (ts_allocate_dtor) file_globals_dtor);
#else
file_globals_ctor(&file_globals);
#endif
REGISTER_INI_ENTRIES();
register_file_symbols(module_number);
return SUCCESS;
}
/* }}} */
PHP_MSHUTDOWN_FUNCTION(file) /* {{{ */
{
#ifndef ZTS
file_globals_dtor(&file_globals);
#endif
return SUCCESS;
}
/* }}} */
PHPAPI void php_flock_common(php_stream *stream, zend_long operation,
uint32_t operation_arg_num, zval *wouldblock, zval *return_value)
{
int flock_values[] = { LOCK_SH, LOCK_EX, LOCK_UN };
int act;
act = operation & PHP_LOCK_UN;
if (act < 1 || act > 3) {
zend_argument_value_error(operation_arg_num, "must be one of LOCK_SH, LOCK_EX, or LOCK_UN");
RETURN_THROWS();
}
if (wouldblock) {
ZEND_TRY_ASSIGN_REF_LONG(wouldblock, 0);
}
/* flock_values contains all possible actions if (operation & PHP_LOCK_NB) we won't block on the lock */
act = flock_values[act - 1] | (operation & PHP_LOCK_NB ? LOCK_NB : 0);
if (php_stream_lock(stream, act)) {
if (operation && errno == EWOULDBLOCK && wouldblock) {
ZEND_TRY_ASSIGN_REF_LONG(wouldblock, 1);
}
RETURN_FALSE;
}
RETURN_TRUE;
}
/* {{{ Portable file locking */
PHP_FUNCTION(flock)
{
zval *res, *wouldblock = NULL;
php_stream *stream;
zend_long operation = 0;
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_RESOURCE(res)
Z_PARAM_LONG(operation)
Z_PARAM_OPTIONAL
Z_PARAM_ZVAL(wouldblock)
ZEND_PARSE_PARAMETERS_END();
PHP_STREAM_FROM_ZVAL(stream, res);
php_flock_common(stream, operation, 2, wouldblock, return_value);
}
/* }}} */
#define PHP_META_UNSAFE ".\\+*?[^]$() "
/* {{{ Extracts all meta tag content attributes from a file and returns an array */
PHP_FUNCTION(get_meta_tags)
{
char *filename;
size_t filename_len;
bool use_include_path = 0;
int in_tag = 0, done = 0;
int looking_for_val = 0, have_name = 0, have_content = 0;
int saw_name = 0, saw_content = 0;
char *name = NULL, *value = NULL, *temp = NULL;
php_meta_tags_token tok, tok_last;
php_meta_tags_data md;
/* Initialize our structure */
memset(&md, 0, sizeof(md));
/* Parse arguments */
ZEND_PARSE_PARAMETERS_START(1, 2)
Z_PARAM_PATH(filename, filename_len)
Z_PARAM_OPTIONAL
Z_PARAM_BOOL(use_include_path)
ZEND_PARSE_PARAMETERS_END();
md.stream = php_stream_open_wrapper(filename, "rb",
(use_include_path ? USE_PATH : 0) | REPORT_ERRORS,
NULL);
if (!md.stream) {
RETURN_FALSE;
}
array_init(return_value);
tok_last = TOK_EOF;
while (!done && (tok = php_next_meta_token(&md)) != TOK_EOF) {
if (tok == TOK_ID) {
if (tok_last == TOK_OPENTAG) {
md.in_meta = !strcasecmp("meta", md.token_data);
} else if (tok_last == TOK_SLASH && in_tag) {
if (strcasecmp("head", md.token_data) == 0) {
/* We are done here! */
done = 1;
}
} else if (tok_last == TOK_EQUAL && looking_for_val) {
if (saw_name) {
if (name) efree(name);
/* Get the NAME attr (Single word attr, non-quoted) */
temp = name = estrndup(md.token_data, md.token_len);
while (temp && *temp) {
if (strchr(PHP_META_UNSAFE, *temp)) {
*temp = '_';
}
temp++;
}
have_name = 1;
} else if (saw_content) {
if (value) efree(value);
value = estrndup(md.token_data, md.token_len);
have_content = 1;
}
looking_for_val = 0;
} else {
if (md.in_meta) {
if (strcasecmp("name", md.token_data) == 0) {
saw_name = 1;
saw_content = 0;
looking_for_val = 1;
} else if (strcasecmp("content", md.token_data) == 0) {
saw_name = 0;
saw_content = 1;
looking_for_val = 1;
}
}
}
} else if (tok == TOK_STRING && tok_last == TOK_EQUAL && looking_for_val) {
if (saw_name) {
if (name) efree(name);
/* Get the NAME attr (Quoted single/double) */
temp = name = estrndup(md.token_data, md.token_len);
while (temp && *temp) {
if (strchr(PHP_META_UNSAFE, *temp)) {
*temp = '_';
}
temp++;
}
have_name = 1;
} else if (saw_content) {
if (value) efree(value);
value = estrndup(md.token_data, md.token_len);
have_content = 1;
}
looking_for_val = 0;
} else if (tok == TOK_OPENTAG) {
if (looking_for_val) {
looking_for_val = 0;
have_name = saw_name = 0;
have_content = saw_content = 0;
}
in_tag = 1;
} else if (tok == TOK_CLOSETAG) {
if (have_name) {
/* For BC */
zend_str_tolower(name, strlen(name));
if (have_content) {
add_assoc_string(return_value, name, value);
} else {
add_assoc_string(return_value, name, "");
}
efree(name);
if (value) efree(value);
} else if (have_content) {
efree(value);
}
name = value = NULL;
/* Reset all of our flags */
in_tag = looking_for_val = 0;
have_name = saw_name = 0;
have_content = saw_content = 0;
md.in_meta = 0;
}
tok_last = tok;
if (md.token_data)
efree(md.token_data);
md.token_data = NULL;
}
if (value) efree(value);
if (name) efree(name);
php_stream_close(md.stream);
}
/* }}} */
/* {{{ Read the entire file into a string */
PHP_FUNCTION(file_get_contents)
{
char *filename;
size_t filename_len;
bool use_include_path = 0;
php_stream *stream;
zend_long offset = 0;
zend_long maxlen;
bool maxlen_is_null = 1;
zval *zcontext = NULL;
php_stream_context *context = NULL;
zend_string *contents;
/* Parse arguments */
ZEND_PARSE_PARAMETERS_START(1, 5)
Z_PARAM_PATH(filename, filename_len)
Z_PARAM_OPTIONAL
Z_PARAM_BOOL(use_include_path)
Z_PARAM_RESOURCE_OR_NULL(zcontext)
Z_PARAM_LONG(offset)
Z_PARAM_LONG_OR_NULL(maxlen, maxlen_is_null)
ZEND_PARSE_PARAMETERS_END();
if (maxlen_is_null) {
maxlen = (ssize_t) PHP_STREAM_COPY_ALL;
} else if (maxlen < 0) {
zend_argument_value_error(5, "must be greater than or equal to 0");
RETURN_THROWS();
}
context = php_stream_context_from_zval(zcontext, 0);
stream = php_stream_open_wrapper_ex(filename, "rb",
(use_include_path ? USE_PATH : 0) | REPORT_ERRORS,
NULL, context);
if (!stream) {
RETURN_FALSE;
}
/* disabling the read buffer allows doing the whole transfer
in just one read() system call */
if (php_stream_is(stream, PHP_STREAM_IS_STDIO)) {
php_stream_set_option(stream, PHP_STREAM_OPTION_READ_BUFFER, PHP_STREAM_BUFFER_NONE, NULL);
}
if (offset != 0 && php_stream_seek(stream, offset, ((offset > 0) ? SEEK_SET : SEEK_END)) < 0) {
php_error_docref(NULL, E_WARNING, "Failed to seek to position " ZEND_LONG_FMT " in the stream", offset);
php_stream_close(stream);
RETURN_FALSE;
}
if ((contents = php_stream_copy_to_mem(stream, maxlen, 0)) != NULL) {
RETVAL_STR(contents);
} else {
RETVAL_EMPTY_STRING();
}
php_stream_close(stream);
}
/* }}} */
/* {{{ Write/Create a file with contents data and return the number of bytes written */
PHP_FUNCTION(file_put_contents)
{
php_stream *stream;
char *filename;
size_t filename_len;
zval *data;
ssize_t numbytes = 0;
zend_long flags = 0;
zval *zcontext = NULL;
php_stream_context *context = NULL;
php_stream *srcstream = NULL;
char mode[3] = "wb";
ZEND_PARSE_PARAMETERS_START(2, 4)
Z_PARAM_PATH(filename, filename_len)
Z_PARAM_ZVAL(data)
Z_PARAM_OPTIONAL
Z_PARAM_LONG(flags)
Z_PARAM_RESOURCE_OR_NULL(zcontext)
ZEND_PARSE_PARAMETERS_END();
if (Z_TYPE_P(data) == IS_RESOURCE) {
php_stream_from_zval(srcstream, data);
}
context = php_stream_context_from_zval(zcontext, flags & PHP_FILE_NO_DEFAULT_CONTEXT);
if (flags & PHP_FILE_APPEND) {
mode[0] = 'a';
} else if (flags & LOCK_EX) {
/* check to make sure we are dealing with a regular file */
if (php_memnstr(filename, "://", sizeof("://") - 1, filename + filename_len)) {
if (strncasecmp(filename, "file://", sizeof("file://") - 1)) {
php_error_docref(NULL, E_WARNING, "Exclusive locks may only be set for regular files");
RETURN_FALSE;
}
}
mode[0] = 'c';
}
mode[2] = '\0';
stream = php_stream_open_wrapper_ex(filename, mode, ((flags & PHP_FILE_USE_INCLUDE_PATH) ? USE_PATH : 0) | REPORT_ERRORS, NULL, context);
if (stream == NULL) {
RETURN_FALSE;
}
if ((flags & LOCK_EX) && (!php_stream_supports_lock(stream) || php_stream_lock(stream, LOCK_EX))) {
php_stream_close(stream);
php_error_docref(NULL, E_WARNING, "Exclusive locks are not supported for this stream");
RETURN_FALSE;
}
if (mode[0] == 'c') {
php_stream_truncate_set_size(stream, 0);
}
switch (Z_TYPE_P(data)) {
case IS_RESOURCE: {
size_t len;
if (php_stream_copy_to_stream_ex(srcstream, stream, PHP_STREAM_COPY_ALL, &len) != SUCCESS) {
numbytes = -1;
} else {
if (len > ZEND_LONG_MAX) {
php_error_docref(NULL, E_WARNING, "content truncated from %zu to " ZEND_LONG_FMT " bytes", len, ZEND_LONG_MAX);
len = ZEND_LONG_MAX;
}
numbytes = len;
}
break;
}
case IS_NULL:
case IS_LONG:
case IS_DOUBLE:
case IS_FALSE:
case IS_TRUE:
convert_to_string(data);
ZEND_FALLTHROUGH;
case IS_STRING:
if (Z_STRLEN_P(data)) {
numbytes = php_stream_write(stream, Z_STRVAL_P(data), Z_STRLEN_P(data));
if (numbytes != -1 && numbytes != Z_STRLEN_P(data)) {
php_error_docref(NULL, E_WARNING, "Only %zd of %zd bytes written, possibly out of free disk space", numbytes, Z_STRLEN_P(data));
numbytes = -1;
}
}
break;
case IS_ARRAY:
if (zend_hash_num_elements(Z_ARRVAL_P(data))) {
ssize_t bytes_written;
zval *tmp;
ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(data), tmp) {
zend_string *t;
zend_string *str = zval_get_tmp_string(tmp, &t);
if (ZSTR_LEN(str)) {
numbytes += ZSTR_LEN(str);
bytes_written = php_stream_write(stream, ZSTR_VAL(str), ZSTR_LEN(str));
if (bytes_written != ZSTR_LEN(str)) {
php_error_docref(NULL, E_WARNING, "Failed to write %zd bytes to %s", ZSTR_LEN(str), filename);
zend_tmp_string_release(t);
numbytes = -1;
break;
}
}
zend_tmp_string_release(t);
} ZEND_HASH_FOREACH_END();
}
break;
case IS_OBJECT:
if (Z_OBJ_HT_P(data) != NULL) {
zval out;
if (zend_std_cast_object_tostring(Z_OBJ_P(data), &out, IS_STRING) == SUCCESS) {
numbytes = php_stream_write(stream, Z_STRVAL(out), Z_STRLEN(out));
if (numbytes != -1 && numbytes != Z_STRLEN(out)) {
php_error_docref(NULL, E_WARNING, "Only %zd of %zd bytes written, possibly out of free disk space", numbytes, Z_STRLEN(out));
numbytes = -1;
}
zval_ptr_dtor_str(&out);
break;
}
}
ZEND_FALLTHROUGH;
default:
numbytes = -1;
break;
}
php_stream_close(stream);
if (numbytes < 0) {
RETURN_FALSE;
}
RETURN_LONG(numbytes);
}
/* }}} */
#define PHP_FILE_BUF_SIZE 80
/* {{{ Read entire file into an array */
PHP_FUNCTION(file)
{
char *filename;
size_t filename_len;
char *p, *s, *e;
int i = 0;
char eol_marker = '\n';
zend_long flags = 0;
bool use_include_path;
bool include_new_line;
bool skip_blank_lines;
php_stream *stream;
zval *zcontext = NULL;
php_stream_context *context = NULL;
zend_string *target_buf;
/* Parse arguments */
ZEND_PARSE_PARAMETERS_START(1, 3)
Z_PARAM_PATH(filename, filename_len)
Z_PARAM_OPTIONAL
Z_PARAM_LONG(flags)
Z_PARAM_RESOURCE_OR_NULL(zcontext)
ZEND_PARSE_PARAMETERS_END();
if ((flags & ~(PHP_FILE_USE_INCLUDE_PATH | PHP_FILE_IGNORE_NEW_LINES | PHP_FILE_SKIP_EMPTY_LINES | PHP_FILE_NO_DEFAULT_CONTEXT)) != 0) {
zend_argument_value_error(2, "must be a valid flag value");
RETURN_THROWS();
}
use_include_path = flags & PHP_FILE_USE_INCLUDE_PATH;
include_new_line = !(flags & PHP_FILE_IGNORE_NEW_LINES);
skip_blank_lines = flags & PHP_FILE_SKIP_EMPTY_LINES;
context = php_stream_context_from_zval(zcontext, flags & PHP_FILE_NO_DEFAULT_CONTEXT);
stream = php_stream_open_wrapper_ex(filename, "rb", (use_include_path ? USE_PATH : 0) | REPORT_ERRORS, NULL, context);
if (!stream) {
RETURN_FALSE;
}
/* Initialize return array */
array_init(return_value);
if ((target_buf = php_stream_copy_to_mem(stream, PHP_STREAM_COPY_ALL, 0)) != NULL) {
s = ZSTR_VAL(target_buf);
e = ZSTR_VAL(target_buf) + ZSTR_LEN(target_buf);
if (!(p = (char*)php_stream_locate_eol(stream, target_buf))) {
p = e;
goto parse_eol;
}
if (stream->flags & PHP_STREAM_FLAG_EOL_MAC) {
eol_marker = '\r';
}
/* for performance reasons the code is duplicated, so that the if (include_new_line)
* will not need to be done for every single line in the file. */
if (include_new_line) {
do {
p++;
parse_eol:
add_index_stringl(return_value, i++, s, p-s);
s = p;
} while ((p = memchr(p, eol_marker, (e-p))));
} else {
do {
int windows_eol = 0;
if (p != ZSTR_VAL(target_buf) && eol_marker == '\n' && *(p - 1) == '\r') {
windows_eol++;
}
if (skip_blank_lines && !(p-s-windows_eol)) {
s = ++p;
continue;
}
add_index_stringl(return_value, i++, s, p-s-windows_eol);
s = ++p;
} while ((p = memchr(p, eol_marker, (e-p))));
}
/* handle any leftovers of files without new lines */
if (s != e) {
p = e;
goto parse_eol;
}
}
if (target_buf) {
zend_string_free(target_buf);
}
php_stream_close(stream);
}
/* }}} */
/* {{{ Create a unique filename in a directory */
PHP_FUNCTION(tempnam)
{
char *dir, *prefix;
size_t dir_len, prefix_len;
zend_string *opened_path;
int fd;
zend_string *p;
ZEND_PARSE_PARAMETERS_START(2, 2)
Z_PARAM_PATH(dir, dir_len)
Z_PARAM_PATH(prefix, prefix_len)
ZEND_PARSE_PARAMETERS_END();
p = php_basename(prefix, prefix_len, NULL, 0);
if (ZSTR_LEN(p) >= 64) {
ZSTR_VAL(p)[63] = '\0';
}
RETVAL_FALSE;
if ((fd = php_open_temporary_fd_ex(dir, ZSTR_VAL(p), &opened_path, PHP_TMP_FILE_OPEN_BASEDIR_CHECK_ALWAYS)) >= 0) {
close(fd);
RETVAL_STR(opened_path);
}
zend_string_release_ex(p, 0);
}
/* }}} */
/* {{{ Create a temporary file that will be deleted automatically after use */
PHP_FUNCTION(tmpfile)
{
php_stream *stream;
ZEND_PARSE_PARAMETERS_NONE();
stream = php_stream_fopen_tmpfile();
if (stream) {
php_stream_to_zval(stream, return_value);
} else {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ Open a file or a URL and return a file pointer */
PHP_FUNCTION(fopen)
{
char *filename, *mode;
size_t filename_len, mode_len;
bool use_include_path = 0;
zval *zcontext = NULL;
php_stream *stream;
php_stream_context *context = NULL;
ZEND_PARSE_PARAMETERS_START(2, 4)
Z_PARAM_PATH(filename, filename_len)
Z_PARAM_STRING(mode, mode_len)
Z_PARAM_OPTIONAL
Z_PARAM_BOOL(use_include_path)
Z_PARAM_RESOURCE_OR_NULL(zcontext)
ZEND_PARSE_PARAMETERS_END();
context = php_stream_context_from_zval(zcontext, 0);
stream = php_stream_open_wrapper_ex(filename, mode, (use_include_path ? USE_PATH : 0) | REPORT_ERRORS, NULL, context);
if (stream == NULL) {
RETURN_FALSE;
}
php_stream_to_zval(stream, return_value);
}
/* }}} */
/* {{{ Close an open file pointer */
PHPAPI PHP_FUNCTION(fclose)
{
zval *res;
php_stream *stream;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_RESOURCE(res)
ZEND_PARSE_PARAMETERS_END();
PHP_STREAM_FROM_ZVAL(stream, res);
if ((stream->flags & PHP_STREAM_FLAG_NO_FCLOSE) != 0) {
php_error_docref(NULL, E_WARNING, ZEND_LONG_FMT " is not a valid stream resource", stream->res->handle);
RETURN_FALSE;
}
php_stream_free(stream,
PHP_STREAM_FREE_KEEP_RSRC |
(stream->is_persistent ? PHP_STREAM_FREE_CLOSE_PERSISTENT : PHP_STREAM_FREE_CLOSE));
RETURN_TRUE;
}
/* }}} */
/* {{{ Execute a command and open either a read or a write pipe to it */
PHP_FUNCTION(popen)
{
char *command, *mode;
size_t command_len, mode_len;
FILE *fp;
php_stream *stream;
char *posix_mode;
ZEND_PARSE_PARAMETERS_START(2, 2)
Z_PARAM_PATH(command, command_len)
Z_PARAM_STRING(mode, mode_len)
ZEND_PARSE_PARAMETERS_END();
posix_mode = estrndup(mode, mode_len);
#ifndef PHP_WIN32
{
char *z = memchr(posix_mode, 'b', mode_len);
if (z) {
memmove(z, z + 1, mode_len - (z - posix_mode));
mode_len--;
}
}
#endif
/* Musl only partially validates the mode. Manually check it to ensure consistent behavior. */
if (mode_len > 2 ||
(mode_len == 1 && (*posix_mode != 'r' && *posix_mode != 'w')) ||
(mode_len == 2 && (memcmp(posix_mode, "rb", 2) && memcmp(posix_mode, "wb", 2)))
) {
zend_argument_value_error(2, "must be one of \"r\", \"rb\", \"w\", or \"wb\"");
efree(posix_mode);
RETURN_THROWS();
}
fp = VCWD_POPEN(command, posix_mode);
if (!fp) {
php_error_docref2(NULL, command, posix_mode, E_WARNING, "%s", strerror(errno));
efree(posix_mode);
RETURN_FALSE;
}
stream = php_stream_fopen_from_pipe(fp, mode);
if (stream == NULL) {
php_error_docref2(NULL, command, mode, E_WARNING, "%s", strerror(errno));
RETVAL_FALSE;
} else {
php_stream_to_zval(stream, return_value);
}
efree(posix_mode);
}
/* }}} */
/* {{{ Close a file pointer opened by popen() */
PHP_FUNCTION(pclose)
{
zval *res;
php_stream *stream;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_RESOURCE(res)
ZEND_PARSE_PARAMETERS_END();
PHP_STREAM_FROM_ZVAL(stream, res);
FG(pclose_wait) = 1;
zend_list_close(stream->res);
FG(pclose_wait) = 0;
RETURN_LONG(FG(pclose_ret));
}
/* }}} */
/* {{{ Test for end-of-file on a file pointer */
PHPAPI PHP_FUNCTION(feof)
{
zval *res;
php_stream *stream;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_RESOURCE(res)
ZEND_PARSE_PARAMETERS_END();
PHP_STREAM_FROM_ZVAL(stream, res);
if (php_stream_eof(stream)) {
RETURN_TRUE;
} else {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ Get a line from file pointer */
PHPAPI PHP_FUNCTION(fgets)
{
zval *res;
zend_long len = 1024;
bool len_is_null = 1;
char *buf = NULL;
size_t line_len = 0;
zend_string *str;
php_stream *stream;
ZEND_PARSE_PARAMETERS_START(1, 2)
Z_PARAM_RESOURCE(res)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(len, len_is_null)
ZEND_PARSE_PARAMETERS_END();
PHP_STREAM_FROM_ZVAL(stream, res);
if (len_is_null) {
/* ask streams to give us a buffer of an appropriate size */
buf = php_stream_get_line(stream, NULL, 0, &line_len);
if (buf == NULL) {
RETURN_FALSE;
}
// TODO: avoid reallocation ???
RETVAL_STRINGL(buf, line_len);
efree(buf);
} else {
if (len <= 0) {
zend_argument_value_error(2, "must be greater than 0");
RETURN_THROWS();
}
str = zend_string_alloc(len, 0);
if (php_stream_get_line(stream, ZSTR_VAL(str), len, &line_len) == NULL) {
zend_string_efree(str);
RETURN_FALSE;
}
/* resize buffer if it's much larger than the result.
* Only needed if the user requested a buffer size. */
if (line_len < (size_t)len / 2) {
str = zend_string_truncate(str, line_len, 0);
} else {
ZSTR_LEN(str) = line_len;
}
RETURN_NEW_STR(str);
}
}
/* }}} */
/* {{{ Get a character from file pointer */
PHPAPI PHP_FUNCTION(fgetc)
{
zval *res;
php_stream *stream;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_RESOURCE(res)
ZEND_PARSE_PARAMETERS_END();
PHP_STREAM_FROM_ZVAL(stream, res);
int result = php_stream_getc(stream);
if (result == EOF) {
RETVAL_FALSE;
} else {
RETURN_CHAR(result);
}
}
/* }}} */
/* {{{ Implements a mostly ANSI compatible fscanf() */
PHP_FUNCTION(fscanf)
{
int result, argc = 0;
size_t format_len;
zval *args = NULL;
zval *file_handle;
char *buf, *format;
size_t len;
void *what;
ZEND_PARSE_PARAMETERS_START(2, -1)
Z_PARAM_RESOURCE(file_handle)
Z_PARAM_STRING(format, format_len)
Z_PARAM_VARIADIC('*', args, argc)
ZEND_PARSE_PARAMETERS_END();
what = zend_fetch_resource2(Z_RES_P(file_handle), "File-Handle", php_file_le_stream(), php_file_le_pstream());
/* we can't do a ZEND_VERIFY_RESOURCE(what), otherwise we end up
* with a leak if we have an invalid filehandle. This needs changing
* if the code behind ZEND_VERIFY_RESOURCE changed. - cc */
if (!what) {
RETURN_THROWS();
}
buf = php_stream_get_line((php_stream *) what, NULL, 0, &len);
if (buf == NULL) {
RETURN_FALSE;
}
result = php_sscanf_internal(buf, format, argc, args, 0, return_value);
efree(buf);
if (SCAN_ERROR_WRONG_PARAM_COUNT == result) {
WRONG_PARAM_COUNT;
}
}
/* }}} */
/* {{{ Binary-safe file write */
PHPAPI PHP_FUNCTION(fwrite)
{
zval *res;