util: split out escaping code into escape.[ch]

This really deserves its own file, given how much code this is now.

1 files changed, 48 insertions, 0 deletions

diff --git a/src/basic/escape.h b/src/basic/escape.h
new file mode 100644
index 0000000000..85ba909081
--- /dev/null
+++ b/src/basic/escape.h
@@ -0,0 +1,48 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/types.h>
+#include <inttypes.h>
+
+/* What characters are special in the shell? */
+/* must be escaped outside and inside double-quotes */
+#define SHELL_NEED_ESCAPE "\"\\`$"
+/* can be escaped or double-quoted */
+#define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
+
+typedef enum UnescapeFlags {
+        UNESCAPE_RELAX = 1,
+} UnescapeFlags;
+
+char *cescape(const char *s);
+size_t cescape_char(char c, char *buf);
+
+int cunescape(const char *s, UnescapeFlags flags, char **ret);
+int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
+int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
+int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode);
+
+char *xescape(const char *s, const char *bad);
+
+char *shell_escape(const char *s, const char *bad);
+char *shell_maybe_quote(const char *s);