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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <inttypes.h>
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#include <uchar.h>
#include "string-util.h"
#include "missing_type.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 << 0,
UNESCAPE_ACCEPT_NUL = 1 << 1,
} UnescapeFlags;
typedef enum EscapeStyle {
ESCAPE_BACKSLASH = 1, /* Add shell quotes ("") so the shell will consider this a single
argument, possibly multiline. Tabs and newlines are not escaped. */
ESCAPE_BACKSLASH_ONELINE = 2, /* Similar to ESCAPE_BACKSLASH, but always produces a single-line
string instead. Shell escape sequences are produced for tabs and
newlines. */
ESCAPE_POSIX = 3, /* Similar to ESCAPE_BACKSLASH_ONELINE, but uses POSIX shell escape
* syntax (a string enclosed in $'') instead of plain quotes. */
} EscapeStyle;
char* cescape(const char *s);
char* cescape_length(const char *s, size_t n);
int cescape_char(char c, char *buf);
int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
static inline int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret) {
return cunescape_length_with_prefix(s, length, NULL, flags, ret);
}
static inline int cunescape(const char *s, UnescapeFlags flags, char **ret) {
return cunescape_length(s, strlen(s), flags, ret);
}
int cunescape_one(const char *p, size_t length, char32_t *ret, bool *eight_bit, bool accept_nul);
char* xescape_full(const char *s, const char *bad, size_t console_width, bool eight_bits);
static inline char* xescape(const char *s, const char *bad) {
return xescape_full(s, bad, SIZE_MAX, false);
}
char* octescape(const char *s, size_t len);
char* escape_non_printable_full(const char *str, size_t console_width, bool eight_bit);
char* shell_escape(const char *s, const char *bad);
char* shell_maybe_quote(const char *s, EscapeStyle style);
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