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#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 <inttypes.h>
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#include <uchar.h>
#include "string-util.h"
#include "missing.h"
/* What characters are special in the shell? */
/* must be escaped outside and inside double-quotes */
#define SHELL_NEED_ESCAPE "\"\\`$"
/* Those that can be escaped or double-quoted.
*
* Stricly speaking, ! does not need to be escaped, except in interactive
* mode, but let's be extra nice to the user and quote ! in case this
* output is ever used in interactive mode. */
#define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;!"
/* Note that we assume control characters would need to be escaped too in
* addition to the "special" characters listed here, if they appear in the
* string. Current users disallow control characters. Also '"' shall not
* be escaped.
*/
#define SHELL_NEED_ESCAPE_POSIX "\\\'"
typedef enum UnescapeFlags {
UNESCAPE_RELAX = 1,
} UnescapeFlags;
typedef enum EscapeStyle {
ESCAPE_BACKSLASH = 1,
ESCAPE_POSIX = 2,
} EscapeStyle;
char *cescape(const char *s);
char *cescape_length(const char *s, size_t n);
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, char32_t *ret, bool *eight_bit);
char *xescape(const char *s, const char *bad);
#if 0 /// UNNEEDED by elogind
char *octescape(const char *s, size_t len);
char *shell_escape(const char *s, const char *bad);
#endif // 0
char* shell_maybe_quote(const char *s, EscapeStyle style);
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