mirror of
https://github.com/samba-team/samba.git
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Add tini parser.
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
This commit is contained in:
Volker Lendecke
Jeremy Allison
parent
c6d0e8dadc
commit
63acc8e810
298
lib/util/tini.c
Normal file
298
lib/util/tini.c
Normal file
@ -0,0 +1,298 @@
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/*
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* Trivial smb.conf parsing code
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*
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* Copyright Volker Lendecke <vl@samba.org> 2014
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, and the entire permission notice in its entirety,
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* including the disclaimer of warranties.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* ALTERNATIVELY, this product may be distributed under the terms of
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* the GNU Public License Version 3 or later, in which case the
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* provisions of the GPL are required INSTEAD OF the above restrictions.
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* (This clause is necessary due to a potential bad interaction between the
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* GPL and the restrictions contained in a BSD-style copyright.)
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*
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* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <ctype.h>
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#include <errno.h>
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#include <string.h>
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#include "tini.h"
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static int next_content(FILE *f)
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{
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int c;
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for (c = fgetc(f); c != EOF; c = fgetc(f)) {
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if (!isspace(c)) {
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break;
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}
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if (c == '\n') {
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break;
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}
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}
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return c;
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}
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static int next_end_of_line(FILE *f)
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{
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int c;
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for (c = fgetc(f); c != EOF; c = fgetc(f)) {
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if (c == '\n') {
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break;
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}
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}
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return c;
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}
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static bool make_space(char **buf, size_t *buflen, size_t position)
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{
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char *tmp;
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if (position < *buflen) {
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return true;
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}
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tmp = realloc(*buf, (*buflen) * 2);
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if (tmp == NULL) {
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return false;
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}
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*buf = tmp;
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*buflen *= 2;
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return true;
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}
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/*
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* Get a conf line into *pbuf (which must be a malloc'ed buffer already).
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*
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* Ignores leading spaces
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* Ignores comment lines
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* Ignores empty lines
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* Takes care of continuation lines
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* Zaps multiple spaces into one
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*/
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static int get_line(FILE *f, char **pbuf, size_t *pbuflen)
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{
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int c;
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char *buf;
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size_t buflen, pos;
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buf = *pbuf;
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buflen = *pbuflen;
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pos = 0;
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next_line:
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c = next_content(f);
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if (c == EOF) {
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return ENOENT;
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}
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if ((c == '#') || (c == ';')) {
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/*
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* Line starting with a comment, skip
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*/
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c = next_end_of_line(f);
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if (c == EOF) {
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return ENOENT;
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}
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goto next_line;
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}
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if (c == '\n') {
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/*
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* Blank line, skip
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*/
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goto next_line;
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}
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for ( ; c != EOF ; c = fgetc(f)) {
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if (c == '\n') {
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if ((pos > 0) && (buf[pos-1] == '\\')) {
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/*
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* Line ends in "\". Continuation.
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*/
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pos -= 1;
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continue;
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}
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if ((pos > 1) && (buf[pos-2] == '\\') &&
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isspace(buf[pos-1])) {
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/*
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* Line ends in "\ ". Mind that we zap
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* multiple spaces into one. Continuation.
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*/
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pos -= 2;
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continue;
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}
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/*
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* No continuation, done with the line
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*/
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break;
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}
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if ((pos > 0) && isspace(buf[pos-1]) && isspace(c)) {
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/*
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* Zap multiple spaces to one
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*/
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continue;
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}
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if (!make_space(&buf, &buflen, pos)) {
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return ENOMEM;
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}
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buf[pos++] = c;
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}
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if (!make_space(&buf, &buflen, pos)) {
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return ENOMEM;
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}
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buf[pos++] = '\0';
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*pbuf = buf;
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return 0;
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}
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static bool parse_section(
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char *buf, bool (*sfunc)(const char *section, void *private_data),
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void *private_data)
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{
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char *p, *q;
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p = buf+1; /* skip [ */
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q = strchr(p, ']');
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if (q == NULL) {
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return false;
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}
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*q = '\0';
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return sfunc(p, private_data);
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}
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static char *trim_one_space(char *buf)
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{
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size_t len;
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if (isspace(buf[0])) {
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buf += 1;
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}
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len = strlen(buf);
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if (len == 0) {
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return buf;
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}
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if (isspace(buf[len-1])) {
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buf[len-1] = '\0';
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}
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return buf;
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}
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static bool parse_param(char *buf,
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bool (*pfunc)(const char *name, const char *value,
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void *private_data),
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void *private_data)
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{
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char *equals;
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char *name, *value;
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size_t len;
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equals = strchr(buf, '=');
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if (equals == NULL) {
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return true;
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}
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*equals = '\0';
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name = trim_one_space(buf);
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len = strlen(buf);
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if (len == 0) {
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return false;
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}
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value = trim_one_space(equals+1);
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return pfunc(name, value, private_data);
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}
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bool tini_parse(FILE *f,
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bool (*sfunc)(const char *section, void *private_data),
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bool (*pfunc)(const char *name, const char *value,
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void *private_data),
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void *private_data)
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{
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char *buf;
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size_t buflen;
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buflen = 256;
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buf = malloc(buflen);
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if (buf == NULL) {
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return false;
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}
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while (true) {
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int ret;
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bool ok;
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ret = get_line(f, &buf, &buflen);
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if (ret == ENOENT) {
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/* No lines anymore */
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break;
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}
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if (ret != 0) {
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/* Real error */
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free(buf);
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return false;
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}
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switch(buf[0]) {
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case 0:
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continue;
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break;
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case '[':
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ok = parse_section(buf, sfunc, private_data);
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break;
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default:
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ok = parse_param(buf, pfunc, private_data);
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break;
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}
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if (!ok) {
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free(buf);
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return false;
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}
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}
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free(buf);
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return true;
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}
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44
lib/util/tini.h
Normal file
44
lib/util/tini.h
Normal file
@ -0,0 +1,44 @@
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/*
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* Trivial smb.conf parsing code
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*
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* Copyright Volker Lendecke <vl@samba.org> 2014
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, and the entire permission notice in its entirety,
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* including the disclaimer of warranties.
|
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
|
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* ALTERNATIVELY, this product may be distributed under the terms of
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* the GNU Public License, in which case the provisions of the GPL are
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* required INSTEAD OF the above restrictions. (This clause is
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* necessary due to a potential bad interaction between the GPL and
|
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* the restrictions contained in a BSD-style copyright.)
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*
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* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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bool tini_parse(FILE *f,
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bool (*sfunc)(const char *section, void *private_data),
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bool (*pfunc)(const char *name, const char *value,
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void *private_data),
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void *private_data);
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@ -5,6 +5,11 @@ bld.SAMBA_SUBSYSTEM('time-basic',
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deps='replace',
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local_include=False)
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bld.SAMBA_SUBSYSTEM('tini',
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source='tini.c',
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deps='',
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local_include=False)
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bld.SAMBA_SUBSYSTEM('close-low-fd',
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source='close_low_fd.c',
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deps='replace',
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@ -24,7 +29,7 @@ bld.SAMBA_LIBRARY('samba-util',
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util_str.c util_str_common.c substitute.c ms_fnmatch.c
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server_id.c dprintf.c parmlist.c bitmap.c pidfile.c
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tevent_debug.c util_process.c memcache.c''',
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deps='DYNCONFIG time-basic close-low-fd samba-debug',
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deps='DYNCONFIG time-basic close-low-fd samba-debug tini',
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public_deps='talloc tevent execinfo pthread LIBCRYPTO charset util_setid systemd-daemon',
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public_headers='debug.h attr.h byteorder.h data_blob.h memory.h safe_string.h time.h talloc_stack.h xfile.h dlinklist.h samba_util.h string_wrappers.h',
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header_path= [ ('dlinklist.h samba_util.h', '.'), ('*', 'util') ],
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