85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
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/*
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* libifupdown/config-parser.c
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* Purpose: config parsing
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*
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* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#include <errno.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libifupdown/config-parser.h"
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#include "libifupdown/fgetline.h"
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#include "libifupdown/tokenize.h"
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static int
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handler_cmp(const void *a, const void *b)
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{
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const char *key = a;
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const struct lif_config_handler *hdl = b;
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return strcmp(key, hdl->key);
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}
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bool
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lif_config_parse_file(FILE *fd, const char *filename, struct lif_config_handler *handlers, size_t handler_count)
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{
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char linebuf[4096];
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size_t lineno = 0;
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while (lif_fgetline(linebuf, sizeof linebuf, fd))
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{
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char *bufp = linebuf;
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char *key = lif_next_token(&bufp);
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char *value = lif_next_token(&bufp);
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lineno++;
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if (!*key || !*value)
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continue;
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struct lif_config_handler *hdl = bsearch(key, handlers, handler_count, sizeof(*handlers),
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handler_cmp);
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if (hdl == NULL)
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{
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fprintf(stderr, "ifupdown-ng: %s:%zu: warning: unknown config setting %s\n",
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filename, lineno, key);
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continue;
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}
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if (!hdl->handle(key, value, hdl->opaque))
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{
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fclose(fd);
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return false;
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}
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}
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fclose(fd);
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return true;
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}
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bool
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lif_config_parse(const char *filename, struct lif_config_handler *handlers, size_t handler_count)
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{
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FILE *f = fopen(filename, "r");
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if (f == NULL)
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{
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fprintf(stderr, "ifupdown-ng: unable to parse %s: %s\n", filename, strerror(errno));
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return false;
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}
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return lif_config_parse_file(f, filename, handlers, handler_count);
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}
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