libifupdown: add abstract config parser implementation
This commit is contained in:
parent
537a56414a
commit
fafa5ed7f9
3 changed files with 118 additions and 1 deletions
3
Makefile
3
Makefile
|
@ -34,7 +34,8 @@ LIBIFUPDOWN_SRC = \
|
|||
libifupdown/state.c \
|
||||
libifupdown/environment.c \
|
||||
libifupdown/execute.c \
|
||||
libifupdown/lifecycle.c
|
||||
libifupdown/lifecycle.c \
|
||||
libifupdown/config-parser.c
|
||||
|
||||
LIBIFUPDOWN_OBJ = ${LIBIFUPDOWN_SRC:.c=.o}
|
||||
LIBIFUPDOWN_LIB = libifupdown.a
|
||||
|
|
84
libifupdown/config-parser.c
Normal file
84
libifupdown/config-parser.c
Normal file
|
@ -0,0 +1,84 @@
|
|||
/*
|
||||
* libifupdown/config-parser.c
|
||||
* Purpose: config parsing
|
||||
*
|
||||
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
|
||||
*
|
||||
* Permission to use, copy, modify, and/or distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* This software is provided 'as is' and without any warranty, express or
|
||||
* implied. In no event shall the authors be liable for any damages arising
|
||||
* from the use of this software.
|
||||
*/
|
||||
|
||||
#include <errno.h>
|
||||
#include <stddef.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include "libifupdown/config-parser.h"
|
||||
#include "libifupdown/fgetline.h"
|
||||
#include "libifupdown/tokenize.h"
|
||||
|
||||
static int
|
||||
handler_cmp(const void *a, const void *b)
|
||||
{
|
||||
const char *key = a;
|
||||
const struct lif_config_handler *hdl = b;
|
||||
|
||||
return strcmp(key, hdl->key);
|
||||
}
|
||||
|
||||
bool
|
||||
lif_config_parse_file(FILE *fd, const char *filename, struct lif_config_handler *handlers, size_t handler_count)
|
||||
{
|
||||
char linebuf[4096];
|
||||
size_t lineno = 0;
|
||||
|
||||
while (lif_fgetline(linebuf, sizeof linebuf, fd))
|
||||
{
|
||||
char *bufp = linebuf;
|
||||
char *key = lif_next_token(&bufp);
|
||||
char *value = lif_next_token(&bufp);
|
||||
|
||||
lineno++;
|
||||
|
||||
if (!*key || !*value)
|
||||
continue;
|
||||
|
||||
struct lif_config_handler *hdl = bsearch(key, handlers, handler_count, sizeof(*handlers),
|
||||
handler_cmp);
|
||||
|
||||
if (hdl == NULL)
|
||||
{
|
||||
fprintf(stderr, "ifupdown-ng: %s:%zu: warning: unknown config setting %s\n",
|
||||
filename, lineno, key);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!hdl->handle(key, value, hdl->opaque))
|
||||
{
|
||||
fclose(fd);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
fclose(fd);
|
||||
return true;
|
||||
}
|
||||
|
||||
bool
|
||||
lif_config_parse(const char *filename, struct lif_config_handler *handlers, size_t handler_count)
|
||||
{
|
||||
FILE *f = fopen(filename, "r");
|
||||
|
||||
if (f == NULL)
|
||||
{
|
||||
fprintf(stderr, "ifupdown-ng: unable to parse %s: %s\n", filename, strerror(errno));
|
||||
return false;
|
||||
}
|
||||
|
||||
return lif_config_parse_file(f, filename, handlers, handler_count);
|
||||
}
|
32
libifupdown/config-parser.h
Normal file
32
libifupdown/config-parser.h
Normal file
|
@ -0,0 +1,32 @@
|
|||
/*
|
||||
* libifupdown/config-parser.h
|
||||
* Purpose: config parsing
|
||||
*
|
||||
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
|
||||
*
|
||||
* Permission to use, copy, modify, and/or distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* This software is provided 'as is' and without any warranty, express or
|
||||
* implied. In no event shall the authors be liable for any damages arising
|
||||
* from the use of this software.
|
||||
*/
|
||||
|
||||
#ifndef LIBIFUPDOWN__CONFIG_PARSER_H
|
||||
#define LIBIFUPDOWN__CONFIG_PARSER_H
|
||||
|
||||
#include <stdbool.h>
|
||||
#include <stddef.h>
|
||||
#include <stdio.h>
|
||||
|
||||
struct lif_config_handler {
|
||||
const char *key;
|
||||
bool (*handle)(const char *key, const char *value, void *opaque);
|
||||
void *opaque;
|
||||
};
|
||||
|
||||
extern bool lif_config_parse_file(FILE *f, const char *filename, struct lif_config_handler *handlers, size_t handler_count);
|
||||
extern bool lif_config_parse(const char *filename, struct lif_config_handler *handlers, size_t handler_count);
|
||||
|
||||
#endif
|
Loading…
Reference in a new issue