diff options
Diffstat (limited to 'dnscache-conf.c')
| -rw-r--r-- | dnscache-conf.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/dnscache-conf.c b/dnscache-conf.c new file mode 100644 index 0000000..e8c12be --- /dev/null +++ b/dnscache-conf.c @@ -0,0 +1,169 @@ +#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); +} |