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samba-mirror/lib/util/tini.c
Volker Lendecke af03b5752b lib: Use isspace on unsigned char
Signed-off-by: Volker Lendecke <vl@samba.org>
Bug: https://bugzilla.samba.org/show_bug.cgi?id=11223
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Apr 27 23:54:27 CEST 2015 on sn-devel-104
2015-04-27 23:54:27 +02:00

308 lines
5.8 KiB
C

/*
* Trivial smb.conf parsing code
*
* Copyright Volker Lendecke <vl@samba.org> 2014
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* ALTERNATIVELY, this product may be distributed under the terms of
* the GNU Public License Version 3 or later, in which case the
* provisions of the GPL are required INSTEAD OF the above restrictions.
* (This clause is necessary due to a potential bad interaction between the
* GPL and the restrictions contained in a BSD-style copyright.)
*
* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include "tini.h"
static bool c_isspace(char c)
{
unsigned char uc = c;
if (c != uc) {
return false;
}
return isspace(uc);
}
static int next_content(FILE *f)
{
int c;
for (c = fgetc(f); c != EOF; c = fgetc(f)) {
if (!c_isspace(c)) {
break;
}
if (c == '\n') {
break;
}
}
return c;
}
static int next_end_of_line(FILE *f)
{
int c;
for (c = fgetc(f); c != EOF; c = fgetc(f)) {
if (c == '\n') {
break;
}
}
return c;
}
static bool make_space(char **buf, size_t *buflen, size_t position)
{
char *tmp;
if (position < *buflen) {
return true;
}
tmp = realloc(*buf, (*buflen) * 2);
if (tmp == NULL) {
return false;
}
*buf = tmp;
*buflen *= 2;
return true;
}
/*
* Get a conf line into *pbuf (which must be a malloc'ed buffer already).
*
* Ignores leading spaces
* Ignores comment lines
* Ignores empty lines
* Takes care of continuation lines
* Zaps multiple spaces into one
*/
static int get_line(FILE *f, char **pbuf, size_t *pbuflen)
{
int c;
char *buf;
size_t buflen, pos;
buf = *pbuf;
buflen = *pbuflen;
pos = 0;
next_line:
c = next_content(f);
if (c == EOF) {
return ENOENT;
}
if ((c == '#') || (c == ';')) {
/*
* Line starting with a comment, skip
*/
c = next_end_of_line(f);
if (c == EOF) {
return ENOENT;
}
goto next_line;
}
if (c == '\n') {
/*
* Blank line, skip
*/
goto next_line;
}
for ( ; c != EOF ; c = fgetc(f)) {
if (c == '\n') {
if ((pos > 0) && (buf[pos-1] == '\\')) {
/*
* Line ends in "\". Continuation.
*/
pos -= 1;
continue;
}
if ((pos > 1) && (buf[pos-2] == '\\') &&
c_isspace(buf[pos-1])) {
/*
* Line ends in "\ ". Mind that we zap
* multiple spaces into one. Continuation.
*/
pos -= 2;
continue;
}
/*
* No continuation, done with the line
*/
break;
}
if ((pos > 0) && c_isspace(buf[pos-1]) && c_isspace(c)) {
/*
* Zap multiple spaces to one
*/
continue;
}
if (!make_space(&buf, &buflen, pos)) {
return ENOMEM;
}
buf[pos++] = c;
}
if (!make_space(&buf, &buflen, pos)) {
return ENOMEM;
}
buf[pos++] = '\0';
*pbuf = buf;
return 0;
}
static bool parse_section(
char *buf, bool (*sfunc)(const char *section, void *private_data),
void *private_data)
{
char *p, *q;
p = buf+1; /* skip [ */
q = strchr(p, ']');
if (q == NULL) {
return false;
}
*q = '\0';
return sfunc(p, private_data);
}
static char *trim_one_space(char *buf)
{
size_t len;
if (c_isspace(buf[0])) {
buf += 1;
}
len = strlen(buf);
if (len == 0) {
return buf;
}
if (c_isspace(buf[len-1])) {
buf[len-1] = '\0';
}
return buf;
}
static bool parse_param(char *buf,
bool (*pfunc)(const char *name, const char *value,
void *private_data),
void *private_data)
{
char *equals;
char *name, *value;
size_t len;
equals = strchr(buf, '=');
if (equals == NULL) {
return true;
}
*equals = '\0';
name = trim_one_space(buf);
len = strlen(buf);
if (len == 0) {
return false;
}
value = trim_one_space(equals+1);
return pfunc(name, value, private_data);
}
bool tini_parse(FILE *f,
bool (*sfunc)(const char *section, void *private_data),
bool (*pfunc)(const char *name, const char *value,
void *private_data),
void *private_data)
{
char *buf;
size_t buflen;
buflen = 256;
buf = malloc(buflen);
if (buf == NULL) {
return false;
}
while (true) {
int ret;
bool ok;
ret = get_line(f, &buf, &buflen);
if (ret == ENOENT) {
/* No lines anymore */
break;
}
if (ret != 0) {
/* Real error */
free(buf);
return false;
}
switch(buf[0]) {
case 0:
continue;
break;
case '[':
ok = parse_section(buf, sfunc, private_data);
break;
default:
ok = parse_param(buf, pfunc, private_data);
break;
}
if (!ok) {
free(buf);
return false;
}
}
free(buf);
return true;
}