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aisparser.c
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/*
* Copyright (c) 2006 Red Hat, Inc.
*
* All rights reserved.
*
* Author: Patrick Caulfield (pcaulfie@redhat.com)
*
* This software licensed under BSD license, the text of which follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - 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.
* - Neither the name of the MontaVista Software, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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 <sys/types.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include "../lcr/lcr_comp.h"
#include "objdb.h"
#include "config.h"
#include "mempool.h"
static int read_config_file_into_objdb(
struct objdb_iface_ver0 *objdb,
char **error_string);
static char error_string_response[512];
static int aisparser_readconfig (struct objdb_iface_ver0 *objdb, char **error_string)
{
if (read_config_file_into_objdb(objdb, error_string)) {
return -1;
}
return 0;
}
char *remove_whitespace(char *string)
{
char *start = string+strspn(string, " \t");
char *end = start+(strlen(start))-1;
while ((*end == ' ' || *end == '\t' || *end == ':' || *end == '{') && end > start)
end--;
if (end != start)
*(end+1) = '\0';
return start;
}
char *strstr_rs (const char *haystack, const char *needle)
{
char *end_address;
char *new_needle;
new_needle = (char *)mempool_strdup (needle);
new_needle[strlen(new_needle) - 1] = '\0';
end_address = strstr (haystack, new_needle);
if (end_address) {
end_address += strlen (new_needle);
end_address = strstr (end_address, needle + strlen (new_needle));
}
if (end_address) {
end_address += 1; /* skip past { or = */
do {
if (*end_address == '\t' || *end_address == ' ') {
end_address++;
} else {
break;
}
} while (*end_address != '\0');
}
mempool_free (new_needle);
return (end_address);
}
static int parse_section(FILE *fp,
struct objdb_iface_ver0 *objdb,
unsigned int parent_handle,
char **error_string)
{
char line[512];
int i;
char *loc;
while (fgets (line, 255, fp)) {
line[strlen(line) - 1] = '\0';
/*
* Clear out white space and tabs
*/
for (i = strlen (line) - 1; i > -1; i--) {
if (line[i] == '\t' || line[i] == ' ') {
line[i] = '\0';
} else {
break;
}
}
/*
* Clear out comments and empty lines
*/
if (line[0] == '#' || line[0] == '\0') {
continue;
}
/* New section ? */
if ((loc = strstr_rs (line, "{"))) {
unsigned int new_parent;
char *section = remove_whitespace(line);
loc--;
*loc = '\0';
printf ("creating object %d %s\n", parent_handle, section);
objdb->object_create (parent_handle, &new_parent,
section, strlen (section));
if (parse_section(fp, objdb, new_parent, error_string))
return -1;
}
/* New key/value */
if ((loc = strstr_rs (line, ":"))) {
char *key;
char *value;
*(loc-1) = '\0';
key = remove_whitespace(line);
value = remove_whitespace(loc);
objdb->object_key_create (parent_handle, key,
strlen (key),
value, strlen (value) + 1);
}
if ((loc = strstr_rs (line, "}"))) {
return 0;
}
}
if (parent_handle != OBJECT_PARENT_HANDLE) {
*error_string = "Missing closing brace";
return -1;
}
return 0;
}
/* Read config file and load into objdb */
static int read_config_file_into_objdb(
struct objdb_iface_ver0 *objdb,
char **error_string)
{
FILE *fp;
char *error_reason = error_string_response;
int res;
fp = fopen (OPENAIS_CONFDIR "/openais.conf", "r");
if (fp == 0) {
sprintf (error_reason, "Can't read file %s/openais.conf reason = (%s)\n",
OPENAIS_CONFDIR, strerror (errno));
*error_string = error_reason;
return -1;
}
res = parse_section(fp, objdb, OBJECT_PARENT_HANDLE, error_string);
fclose(fp);
return res;
}
/*
* Dynamic Loader definition
*/
struct config_iface_ver0 aisparser_iface_ver0 = {
.config_readconfig = aisparser_readconfig
};
struct lcr_iface openais_aisparser_ver0[1] = {
{
.name = "aisparser",
.version = 0,
.versions_replace = 0,
.versions_replace_count = 0,
.dependencies = 0,
.dependency_count = 0,
.constructor = NULL,
.destructor = NULL,
.interfaces = NULL,
}
};
struct openais_service_handler *aisparser_get_handler_ver0 (void);
struct lcr_comp aisparser_comp_ver0 = {
.iface_count = 1,
.ifaces = openais_aisparser_ver0
};
__attribute__ ((constructor)) static void aisparser_comp_register (void) {
lcr_interfaces_set (&openais_aisparser_ver0[0], &aisparser_iface_ver0);
lcr_component_register (&aisparser_comp_ver0);
}

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