uclibc-ng/libc/string/config.c

/* config.c: Config file reader.
 *
 * Copyright 1999 D. Jeff Dionne, <jeff@rt-control.com>
 *
 * This is free software, under the LGPL V2.0
 */

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <cfgfile.h>

/* This is a quick and dirty config file parser.  It reads the file once for
 * each request, there is no cache.  Each line must be less than 128bytes.
 */

static char *args[16];
static char cfgbuf[128];

static char *ws(char **buf)
{
	char *b = *buf;
	char *p;

	/* eat ws */
	while (*b && (*b == ' ' || *b == '\n' || *b == '\t'))
		b++;
	p = b;

	/* find the end */
	while (*p && !(*p == ' ' || *p == '\n' || *p == '\t'))
		p++;
	*p = 0;
	*buf = p + 1;
	return b;
}

char **cfgread(FILE * fp)
{
	char *ebuf;
	char *p;
	int i;

	if (!fp) {
		errno = EIO;
		return (void *) 0;
	}

	while (fgets(cfgbuf, sizeof(cfgbuf), fp)) {

		/* ship comment lines */
		if (cfgbuf[0] == '#')
			continue;

		ebuf = cfgbuf + strlen(cfgbuf);

		p = cfgbuf;
		for (i = 0; i < 16 && p < ebuf; i++) {
			args[i] = ws(&p);
		}
		args[i] = (void *) 0;

		/* return if we found something */
		if (strlen(args[0]))
			return args;
	}
	return (void *) 0;
}

char **cfgfind(FILE * fp, char *var)
{
	char **ret;
	char search[80];

	if (!fp || !var) {
		errno = EIO;
		return (void *) 0;
	}

	strncpy(search, var, sizeof(search));

	fseek(fp, 0, SEEK_SET);
	while ((ret = cfgread(fp))) {
		if (!strcmp(ret[0], search))
			return ret;
	}
	return (void *) 0;
}