php-src/ext/phar/stream.h
Nikita Popov d59aac58b3 Report errors from stream read and write operations
The php_stream_read() and php_stream_write() functions now return
an ssize_t value, with negative results indicating failure. Functions
like fread() and fwrite() will return false in that case.

As a special case, EWOULDBLOCK and EAGAIN on non-blocking streams
should not be regarded as error conditions, and be reported as
successful zero-length reads/writes instead. The handling of EINTR
remains unclear and is internally inconsistent (e.g. some code-paths
will automatically retry on EINTR, while some won't).

I'm landing this now to make sure the stream wrapper ops API changes
make it into 7.4 -- however, if the user-facing changes turn out to
be problematic we have the option of clamping negative returns to
zero in php_stream_read() and php_stream_write() to restore the
old behavior in a relatively non-intrusive manner.
2019-07-22 17:17:28 +02:00

37 lines
2.4 KiB
C

/*
+----------------------------------------------------------------------+
| phar php single-file executable PHP extension |
+----------------------------------------------------------------------+
| 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: |
| 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> |
+----------------------------------------------------------------------+
*/
BEGIN_EXTERN_C()
php_url* phar_parse_url(php_stream_wrapper *wrapper, const char *filename, const char *mode, int options);
void phar_entry_remove(phar_entry_data *idata, char **error);
static php_stream* phar_wrapper_open_url(php_stream_wrapper *wrapper, const char *path, const char *mode, int options, zend_string **opened_path, php_stream_context *context STREAMS_DC);
static int phar_wrapper_rename(php_stream_wrapper *wrapper, const char *url_from, const char *url_to, int options, php_stream_context *context);
static int phar_wrapper_unlink(php_stream_wrapper *wrapper, const char *url, int options, php_stream_context *context);
static int phar_wrapper_stat(php_stream_wrapper *wrapper, const char *url, int flags, php_stream_statbuf *ssb, php_stream_context *context);
/* file/stream handlers */
static ssize_t phar_stream_write(php_stream *stream, const char *buf, size_t count);
static ssize_t phar_stream_read( php_stream *stream, char *buf, size_t count);
static int phar_stream_close(php_stream *stream, int close_handle);
static int phar_stream_flush(php_stream *stream);
static int phar_stream_seek( php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffset);
static int phar_stream_stat( php_stream *stream, php_stream_statbuf *ssb);
END_EXTERN_C()