mirror of
https://github.com/pygos/init.git
synced 2024-06-02 02:08:44 +02:00
04a23330e4
- Common function for splitting string into argument vector - Preprocess & split command lines while parsing the service file - Specify "before" and "after" dependencies in a single line Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
94 lines
3 KiB
C
94 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
|
|
/*
|
|
* Copyright (C) 2018 - David Oberhollenzer
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef UTIL_H
|
|
#define UTIL_H
|
|
|
|
#include <sys/types.h>
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
|
|
#include "config.h"
|
|
|
|
#ifdef __GNUC__
|
|
#define NORETURN __attribute__((noreturn))
|
|
#endif
|
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
|
|
|
typedef struct {
|
|
const char *name;
|
|
int value;
|
|
} enum_map_t;
|
|
|
|
|
|
/*
|
|
Read from fd until end-of-file or a line feed is encountered.
|
|
|
|
Returns NULL with errno set on failure. Returns NULL with errno
|
|
cleared if end-of-file is reached.
|
|
|
|
The line must be deallocated with free().
|
|
|
|
The following transformations are applied:
|
|
- Space characters are replaced with regular white space characters.
|
|
- Sequences of space characters are truncated to a single space.
|
|
- A '#' sign is interpreted as the start of a comment and removed,
|
|
together with everything that follows.
|
|
- Padding spaces are removed from the line.
|
|
- If a '"' is encounterd, the above rules are disabled, until a
|
|
after the matching '"' is read. A '"' can be escaped by preceeding
|
|
it with a backslash.
|
|
- If a second, coresponding '"' is not found, processing fails with
|
|
errno set to EILSEQ.
|
|
- If a '%' character is encountered, the next character is expected
|
|
to be a single digit index into argv. If it is not a digit or
|
|
outside the bounds set by argc, processing fails and sets errno
|
|
to EINVAL. On success, the argv value is inserted and processed
|
|
as described above.
|
|
- A '%' character can be escaped by writing '%%' or, if inside
|
|
a double quite string, by writing \%.
|
|
- An attempt to use such an indexed argument inside an argument
|
|
expansion, results in failure with errno set to ELOOP.
|
|
*/
|
|
char *rdline(int fd, int argc, const char *const *argv);
|
|
|
|
/*
|
|
Remove double quotes ('"') from a string and substitute escape
|
|
sequences in between double quotes.
|
|
*/
|
|
int unescape(char *src);
|
|
|
|
char **split_argv(char *str);
|
|
|
|
/*
|
|
Search through an array of enum_map_t entries to resolve a string to
|
|
a numeric value. The end of the map is indicated by a sentinel entry
|
|
with the name set to NULL.
|
|
*/
|
|
const enum_map_t *enum_by_name(const enum_map_t *map, const char *name);
|
|
|
|
/*
|
|
Search through an array of enum_map_t entries to resolve a numeric
|
|
value to a string name. The end of the map is indicated by a sentinel
|
|
entry with the name set to NULL.
|
|
*/
|
|
const char *enum_to_name(const enum_map_t *map, int value);
|
|
|
|
#endif /* UTIL_H */
|
|
|