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#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "hasdevtcp.h"
#ifdef HASDEVTCP
#include <sys/mkdev.h>
#endif
#include <pwd.h>
#include "strerr.h"
#include "buffer.h"
#include "uint32.h"
#include "taia.h"
#include "str.h"
#include "open.h"
#include "error.h"
#include "exit.h"
#include "auto_home.h"
#include "generic-conf.h"
#define FATAL "dnscache-conf: fatal: "
void usage(void)
{
strerr_die1x(100,"dnscache-conf: usage: dnscache-conf acct logacct /dnscache [ myip ]");
}
int fdrootservers;
char rootserversbuf[64];
buffer ssrootservers;
char *dir;
char *user;
char *loguser;
struct passwd *pw;
const char *myip;
uint32 seed[32];
int seedpos = 0;
void seed_adduint32(uint32 u)
{
int i;
seed[seedpos] += u;
if (++seedpos == 32) {
for (i = 0;i < 32;++i) {
u = ((u ^ seed[i]) + 0x9e3779b9) ^ (u << 7) ^ (u >> 25);
seed[i] = u;
}
seedpos = 0;
}
}
void seed_addtime(void)
{
struct taia t;
char tpack[TAIA_PACK];
int i;
taia_now(&t);
taia_pack(tpack,&t);
for (i = 0;i < TAIA_PACK;++i)
seed_adduint32(tpack[i]);
}
int main(int argc,char **argv)
{
seed_addtime();
seed_adduint32(getpid());
seed_adduint32(getppid());
seed_adduint32(getuid());
seed_adduint32(getgid());
user = argv[1];
if (!user) usage();
loguser = argv[2];
if (!loguser) usage();
dir = argv[3];
if (!dir) usage();
if (dir[0] != '/') usage();
myip = argv[4];
if (!myip) myip = "127.0.0.1";
pw = getpwnam(loguser);
seed_addtime();
if (!pw)
strerr_die3x(111,FATAL,"unknown account ",loguser);
if (chdir(auto_home) == -1)
strerr_die4sys(111,FATAL,"unable to switch to ",auto_home,": ");
fdrootservers = open_read("/etc/dnsroots.local");
if (fdrootservers == -1) {
if (errno != error_noent)
strerr_die2sys(111,FATAL,"unable to open /etc/dnsroots.local: ");
fdrootservers = open_read("/etc/dnsroots.global");
if (fdrootservers == -1)
strerr_die2sys(111,FATAL,"unable to open /etc/dnsroots.global: ");
}
init(dir,FATAL);
seed_addtime(); makedir("log");
seed_addtime(); perm(02755);
seed_addtime(); makedir("log/main");
seed_addtime(); owner(pw->pw_uid,pw->pw_gid);
seed_addtime(); perm(02755);
seed_addtime(); start("log/status"); finish();
seed_addtime(); owner(pw->pw_uid,pw->pw_gid);
seed_addtime(); perm(0644);
seed_addtime(); makedir("env");
seed_addtime(); perm(02755);
seed_addtime(); start("env/ROOT"); outs(dir); outs("/root\n"); finish();
seed_addtime(); perm(0644);
seed_addtime(); start("env/IP"); outs(myip); outs("\n"); finish();
seed_addtime(); perm(0644);
seed_addtime(); start("env/IPSEND"); outs("0.0.0.0\n"); finish();
seed_addtime(); perm(0644);
seed_addtime(); start("env/CACHESIZE"); outs("1000000\n"); finish();
seed_addtime(); perm(0644);
seed_addtime(); start("env/DATALIMIT"); outs("3000000\n"); finish();
seed_addtime(); perm(0644);
seed_addtime(); start("run");
outs("#!/bin/sh\nexec 2>&1\nexec <seed\nexec envdir ./env sh -c '\n exec envuidgid "); outs(user);
outs(" softlimit -o250 -d \"$DATALIMIT\" ");
outs(auto_home); outs("/bin/dnscache\n'\n"); finish();
seed_addtime(); perm(0755);
seed_addtime(); start("log/run");
outs("#!/bin/sh\nexec setuidgid "); outs(loguser);
outs(" multilog t ./main\n"); finish();
seed_addtime(); perm(0755);
seed_addtime(); makedir("root");
seed_addtime(); perm(02755);
seed_addtime(); makedir("root/ip");
seed_addtime(); perm(02755);
seed_addtime(); start("root/ip/127.0.0.1"); finish();
seed_addtime(); perm(0600);
seed_addtime(); makedir("root/servers");
seed_addtime(); perm(02755);
seed_addtime(); start("root/servers/@");
buffer_init(&ssrootservers,buffer_unixread,fdrootservers,rootserversbuf,sizeof rootserversbuf);
copyfrom(&ssrootservers);
finish();
seed_addtime(); perm(0644);
seed_addtime();
start("seed"); out((char *) seed,128); finish();
perm(0600);
#ifdef HASDEVTCP
makedir("root/etc");
perm(02755);
makedir("root/dev");
perm(02755);
start("root/etc/netconfig");
outs("tcp tpi_cots_ord v inet tcp /dev/tcp -\n");
outs("udp tpi_clts v inet udp /dev/udp -\n");
finish();
perm(0645);
umask(000);
if (mknod("root/dev/tcp",S_IFCHR | 0667,makedev(11,42)) == -1)
strerr_die4sys(111,FATAL,"unable to create device ",dir,"/root/dev/tcp: ");
if (mknod("root/dev/udp",S_IFCHR | 0667,makedev(11,41)) == -1)
strerr_die4sys(111,FATAL,"unable to create device ",dir,"/root/dev/udp: ");
umask(022);
#endif
_exit(0);
}
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