+ * Get STDERR output from a child process
+ *
+ * This is designed to be used with processes that were
+ * opened with sq_popen(), and will return any output
+ * that may be available from STDERR of the child process
+ * at the current time.
+ *
+ * If a value is given for $timeout_seconds, this function
+ * will wait that long for output in case there is none
+ * right now.
+ *
+ * In PHP environments that do not support proc_open(),
+ * an empty string will always be returned.
+ *
+ * @param resource $handle The handle to the child process,
+ * as returned from sq_popen().
+ * @param int $timeout_seconds The number of seconds to wait
+ * for output if there is none
+ * available immediately (OPTIONAL;
+ * default is not to wait)
+ * @param boolean $quiet When TRUE, errors are silently
+ * ignored (OPTIONAL; default is TRUE).
+ *
+ * @return string Any STDERR output that may have been found.
+ *
+ * @since 1.5.2
+ *
+ */
+function sq_get_pipe_stderr($handle, $timeout_seconds=0, $quiet=TRUE) {
+
+ // yes, we are testing for proc_OPEN
+ // because we need to know how the
+ // handle was actually OPENED
+ //
+ if (!function_exists('proc_open'))
+ return '';
+
+
+ // get our process out of the process store
+ //
+ global $processes;
+ if (!is_array($processes) || !isset($processes[$handle])) {
+ if (!quiet) {
+ plain_error_message(_("Failed to find corresponding open process handle"));
+ }
+ return '';
+ }
+ $proc = $processes[$handle];
+
+
+ // get all we can from stderr, don't wait longer
+ // than our timeout for input
+ //
+ $contents = '';
+ $read = array($proc[1][2]);
+ $write = NULL;
+ $except = NULL;
+ if (stream_select($read, $write, $except, $timeout_seconds))
+ while (!feof($proc[1][2])) $contents .= fread($proc[1][2], 8192);
+ return $contents;
+
+}
+
+
+/**
+ * Get STDOUT output from a child process
+ *
+ * This is designed to be used with processes that were
+ * opened with sq_popen(), and will return any output
+ * that may be available from STDOUT of the child process
+ * at the current time.
+ *
+ * If a value is given for $timeout_seconds, this function
+ * will wait that long for output in case there is none
+ * right now.
+ *
+ * In PHP environments that do not support proc_open(),
+ * an empty string will always be returned.
+ *
+ * @param resource $handle The handle to the child process,
+ * as returned from sq_popen().
+ * @param int $timeout_seconds The number of seconds to wait
+ * for output if there is none
+ * available immediately (OPTIONAL;
+ * default is not to wait)
+ * @param boolean $quiet When TRUE, errors are silently
+ * ignored (OPTIONAL; default is TRUE).
+ *
+ * @return string Any STDOUT output that may have been found.
+ *
+ * @since 1.5.2
+ *
+ */
+function sq_get_pipe_stdout($handle, $timeout_seconds=0, $quiet=TRUE) {
+
+ // yes, we are testing for proc_OPEN
+ // because we need to know how the
+ // handle was actually OPENED
+ //
+ if (!function_exists('proc_open'))
+ return '';
+
+
+ // get our process out of the process store
+ //
+ global $processes;
+ if (!is_array($processes) || !isset($processes[$handle])) {
+ if (!quiet) {
+ plain_error_message(_("Failed to find corresponding open process handle"));
+ }
+ return '';
+ }
+ $proc = $processes[$handle];
+
+
+ // get all we can from stdout, don't wait longer
+ // than our timeout for input
+ //
+ $contents = '';
+ $read = array($proc[1][1]);
+ $write = NULL;
+ $except = NULL;
+ if (stream_select($read, $write, $except, $timeout_seconds))
+ while (!feof($proc[1][1])) $contents .= fread($proc[1][1], 8192);
+ return $contents;
+
+}
+
+
+/**
+ * SquirrelMail wrapper for pclose()/proc_close()
+ *
+ * This is designed to be used with processes that were
+ * opened with sq_popen(), and will correctly close
+ * all pipes/handles that were opened as well as the
+ * child process itself.
+ *
+ * @param resource $handle The handle to the child process,
+ * as returned from sq_popen().
+ * @param boolean $quiet When TRUE, errors are silently
+ * ignored (OPTIONAL; default is TRUE).
+ *
+ * @return int The termination status of the child process.
+ *
+ * @since 1.5.2
+ *
+ */
+function sq_pclose($handle, $quiet=TRUE) {
+
+ // yes, we are testing for proc_OPEN
+ // because we need to know how the
+ // handle was actually OPENED
+ //
+ if (!function_exists('proc_open'))
+ return pclose($handle);
+
+
+ // get our process out of the process store
+ //
+ global $processes;
+ if (!is_array($processes) || !isset($processes[$handle])) {
+ if (!quiet) {
+ plain_error_message(_("Failed to find corresponding open process handle"));
+ }
+ return 127;