- Implemented request #26158/bug #53465 (open arbitrary file descript…

…or with fopen)

NEWS

@@ -21,6 +21,9 @@
   . Fixed bug #53515 (property_exists incorrect on ArrayObject null and 0
     values). (Felipe)
 
+- Streams
+  . Implemented FR #26158 (open arbitrary file descriptor with fopen)
+
 09 Dec 2010, PHP 5.3.4
 - Upgraded bundled Sqlite3 to version 3.7.3. (Ilia)
 - Upgraded bundled PCRE to version 8.10. (Ilia)

ext/standard/php_fopen_wrapper.c

@@ -257,6 +257,39 @@ php_stream * php_stream_url_wrap_php(php_stream_wrapper *wrapper, char *path, ch
 		} else {
 			fd = dup(STDERR_FILENO);
 		}
+	} else if (!strncasecmp(path, "fd/", 3)) {
+		char	   *start,
+				   *end;
+		long	   fildes_ori;
+		int		   dtablesize;
+
+		start = &path[3];
+		fildes_ori = strtol(start, &end, 10);
+		if (end == start || (*end != '\0' && *end != '/')) {
+			php_stream_wrapper_log_error(wrapper, options TSRMLS_CC,
+				"php://fd/ stream must be specified in the form php://fd/<orig fd>");
+			return NULL;
+		}
+
+#if HAVE_UNISTD_H
+		dtablesize = getdtablesize();
+#else
+		dtablesize = INT_MAX;
+#endif
+
+		if (fildes_ori < 0 || fildes_ori >= dtablesize) {
+			php_stream_wrapper_log_error(wrapper, options TSRMLS_CC,
+				"The file descriptors must be non-negative numbers smaller than %d", dtablesize);
+			return NULL;
+		}
+
+		fd = dup(fildes_ori);
+		if (fd == -1) {
+			php_stream_wrapper_log_error(wrapper, options TSRMLS_CC,
+				"Error duping file descriptor %d; possibly it doesn't exist: "
+				"[%d]: %s", fildes_ori, errno, strerror(errno));
+			return NULL;
+		}
 	} else if (!strncasecmp(path, "filter/", 7)) {
 		/* Save time/memory when chain isn't specified */
 		if (strchr(mode, 'r') || strchr(mode, '+')) {