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/*
* System configuration routines
*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the Internet Initiative Japan, Inc. The name of the
* IIJ may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id: systems.c,v 1.16 1997/09/04 00:38:21 brian Exp $
*
* TODO:
*/
#include <sys/param.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mbuf.h"
#include "log.h"
#include "defs.h"
#include "timer.h"
#include "fsm.h"
#include "loadalias.h"
#include "command.h"
#include "ipcp.h"
#include "pathnames.h"
#include "vars.h"
#include "server.h"
#include "systems.h"
static int uid;
static int gid;
static int euid;
static int egid;
static int usermode;
int
OrigUid()
{
return uid;
}
void
GetUid()
{
uid = getuid();
gid = getgid();
euid = geteuid();
egid = getegid();
usermode = 0;
}
static void
SetUserId()
{
if (!usermode) {
if (setreuid(euid, uid) == -1) {
LogPrintf(LogERROR, "unable to setreuid!\n");
ServerClose();
exit(1);
}
if (setregid(egid, gid) == -1) {
LogPrintf(LogERROR, "unable to setregid!\n");
ServerClose();
exit(1);
}
usermode = 1;
}
}
static void
SetPppId()
{
if (usermode) {
if (setreuid(uid, euid) == -1) {
LogPrintf(LogERROR, "unable to setreuid!\n");
ServerClose();
exit(1);
}
if (setregid(gid, egid) == -1) {
LogPrintf(LogERROR, "unable to setregid!\n");
ServerClose();
exit(1);
}
usermode = 0;
}
}
FILE *
OpenSecret(char *file)
{
FILE *fp;
char *cp;
char line[100];
fp = NULL;
cp = getenv("HOME");
if (cp) {
SetUserId();
snprintf(line, sizeof line, "%s/.%s", cp, file);
fp = fopen(line, "r");
}
if (fp == NULL) {
SetPppId();
snprintf(line, sizeof line, "%s/%s", _PATH_PPP, file);
fp = fopen(line, "r");
}
if (fp == NULL) {
LogPrintf(LogWARN, "OpenSecret: Can't open %s.\n", line);
SetPppId();
return (NULL);
}
return (fp);
}
void
CloseSecret(FILE * fp)
{
fclose(fp);
SetPppId();
}
int
SelectSystem(char *name, char *file)
{
FILE *fp;
char *cp, *wp;
int n;
u_char olauth;
char line[200];
char filename[200];
int linenum;
fp = NULL;
cp = getenv("HOME");
if (cp) {
SetUserId();
snprintf(filename, sizeof filename, "%s/.%s", cp, file);
fp = fopen(filename, "r");
}
if (fp == NULL) {
SetPppId(); /* fix from pdp@ark.jr3uom.iijnet.or.jp */
snprintf(filename, sizeof filename, "%s/%s", _PATH_PPP, file);
fp = fopen(filename, "r");
}
if (fp == NULL) {
LogPrintf(LogDEBUG, "SelectSystem: Can't open %s.\n", filename);
SetPppId();
return (-1);
}
LogPrintf(LogDEBUG, "SelectSystem: Checking %s (%s).\n", name, filename);
linenum = 0;
while (fgets(line, sizeof(line), fp)) {
linenum++;
cp = line;
switch (*cp) {
case '#': /* comment */
break;
case ' ':
case '\t':
break;
default:
wp = strpbrk(cp, ":\n");
if (wp == NULL) {
LogPrintf(LogWARN, "Bad rule in %s (line %d) - missing colon.\n",
filename, linenum);
ServerClose();
exit(1);
}
*wp = '\0';
if (strcmp(cp, name) == 0) {
while (fgets(line, sizeof(line), fp)) {
cp = line;
if (*cp == ' ' || *cp == '\t') {
n = strspn(cp, " \t");
cp += n;
LogPrintf(LogCOMMAND, "%s: %s\n", name, cp);
SetPppId();
olauth = VarLocalAuth;
if (VarLocalAuth == LOCAL_NO_AUTH)
VarLocalAuth = LOCAL_AUTH;
DecodeCommand(cp, strlen(cp), 0);
VarLocalAuth = olauth;
SetUserId();
} else if (*cp == '#') {
continue;
} else
break;
}
fclose(fp);
SetPppId();
return (0);
}
break;
}
}
fclose(fp);
SetPppId();
return -1;
}
int
LoadCommand(struct cmdtab const * list, int argc, char **argv)
{
char *name;
if (argc > 0)
name = *argv;
else
name = "default";
if (SelectSystem(name, CONFFILE) < 0) {
LogPrintf(LogWARN, "%s: not found.\n", name);
return -1;
}
return 0;
}
int
SaveCommand(struct cmdtab const *list, int argc, char **argv)
{
LogPrintf(LogWARN, "save command is not implemented (yet).\n");
return 1;
}
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