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[people/pmueller/ipfire-2.x.git] / src / misc-progs / rebuildhosts.c

/* IPCop helper program - rebuildhosts\r
 *\r
 * This program is distributed under the terms of the GNU General Public\r
 * Licence.  See the file COPYING for details.\r
 *\r
 * (c) Alan Hourihane, 2003\r
 * \r
 *\r
 * $Id: rebuildhosts.c,v 1.3.2.6 2005/07/11 10:56:47 franck78 Exp $\r
 *\r
 */\r
\r
#include "libsmooth.h"\r
#include <stdio.h>\r
#include <stdlib.h>\r
#include <unistd.h>\r
#include <fcntl.h>\r
#include <string.h>\r
#include <sys/types.h>\r
#include <sys/stat.h>\r
#include <signal.h>\r
#include "setuid.h"\r
\r
FILE *fd = NULL;\r
FILE *hosts = NULL;\r
struct keyvalue *kv = NULL;\r
\r
void exithandler(void)\r
{\r
	if (kv)\r
		freekeyvalues(kv);\r
	if (fd)\r
		fclose(fd);\r
	if (hosts)\r
		fclose(hosts);\r
}\r
\r
int main(int argc, char *argv[])\r
{\r
	int fdpid; \r
	char hostname[STRING_SIZE];\r
	char domainname[STRING_SIZE] = "";\r
	char buffer[STRING_SIZE];\r
	char address[STRING_SIZE];\r
	char *active, *ip, *host, *domain;\r
	int pid;\r
\r
	if (!(initsetuid()))\r
		exit(1);\r
\r
	atexit(exithandler);\r
\r
	memset(buffer, 0, STRING_SIZE);\r
\r
	kv = initkeyvalues();\r
	if (!(readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")))\r
	{\r
		fprintf(stderr, "Couldn't read ethernet settings\n");\r
		exit(1);\r
	}\r
	findkey(kv, "GREEN_ADDRESS", address);\r
	freekeyvalues(kv);\r
\r
	kv = initkeyvalues();\r
	if (!(readkeyvalues(kv, CONFIG_ROOT "/main/settings")))\r
	{\r
		fprintf(stderr, "Couldn't read main settings\n");\r
		exit(1);\r
	}\r
	strcpy(hostname, SNAME ); \r
	findkey(kv, "HOSTNAME", hostname);\r
	findkey(kv, "DOMAINNAME", domainname);\r
	freekeyvalues(kv);\r
	kv = NULL;\r
\r
	if (!(fd = fopen(CONFIG_ROOT "/main/hosts", "r")))\r
	{\r
		fprintf(stderr, "Couldn't open main hosts file\n");\r
		exit(1);\r
	}\r
	if (!(hosts = fopen("/etc/hosts", "w")))\r
	{\r
		fprintf(stderr, "Couldn't open /etc/hosts file\n");\r
    		fclose(fd);\r
		fd = NULL;\r
		exit(1);\r
	}\r
	fprintf(hosts, "127.0.0.1\tlocalhost\n");\r
	if (strlen(domainname))\r
		fprintf(hosts, "%s\t%s.%s\t%s\n",address,hostname,domainname,hostname);\r
	else\r
		fprintf(hosts, "%s\t%s\n",address,hostname);\r
	while (fgets(buffer, STRING_SIZE, fd))\r
	{\r
		buffer[strlen(buffer) - 1] = 0;\r
		if (buffer[0]==',') continue;		/* disabled if empty field	*/\r
		active = strtok(buffer, ",");\r
		if (strcmp(active, "off")==0) continue; /* or 'off'			*/\r
		\r
		ip = strtok(NULL, ",");\r
		host = strtok(NULL, ",");\r
		domain = strtok(NULL, ",");\r
\r
		if (!(ip && host))\r
			continue;	// bad line ? skip\r
\r
		if (!VALID_IP(ip))\r
		{\r
			fprintf(stderr, "Bad IP: %s\n", ip);\r
			continue;       /*  bad ip, skip */\r
		}\r
\r
		if (strspn(host, LETTERS_NUMBERS "-") != strlen(host))\r
		{\r
			fprintf(stderr, "Bad Host: %s\n", host);\r
			continue;       /*  bad name, skip */\r
		}\r
\r
		if (domain)\r
			fprintf(hosts, "%s\t%s.%s\t%s\n",ip,host,domain,host);\r
		else\r
			fprintf(hosts, "%s\t%s\n",ip,host);\r
	}\r
	fclose(fd);\r
	fd = NULL;\r
	fclose(hosts);\r
	hosts = NULL;\r
\r
	if ((fdpid = open("/var/run/dnsmasq.pid", O_RDONLY)) == -1)\r
	{\r
		fprintf(stderr, "Couldn't open pid file\n");\r
		exit(1);\r
	}\r
	if (read(fdpid, buffer, STRING_SIZE - 1) == -1)\r
	{\r
		fprintf(stderr, "Couldn't read from pid file\n");\r
		close(fdpid);\r
		exit(1);\r
	}\r
	close(fdpid);\r
	pid = atoi(buffer);\r
	if (pid <= 1)\r
	{\r
		fprintf(stderr, "Bad pid value\n");\r
		exit(1);\r
	}\r
	if (kill(pid, SIGHUP) == -1)\r
	{\r
		fprintf(stderr, "Unable to send SIGHUP\n");\r
		exit(1);\r
	}\r
\r
	return 0;\r
}\r