| 1 | #include <unistd.h> |
| 2 | #include <sys/types.h> |
| 3 | #include <sys/stat.h> |
| 4 | #include "hasdevtcp.h" |
| 5 | #ifdef HASDEVTCP |
| 6 | #include <sys/mkdev.h> |
| 7 | #endif |
| 8 | #include <pwd.h> |
| 9 | #include "strerr.h" |
| 10 | #include "buffer.h" |
| 11 | #include "uint32.h" |
| 12 | #include "taia.h" |
| 13 | #include "str.h" |
| 14 | #include "open.h" |
| 15 | #include "error.h" |
| 16 | #include "exit.h" |
| 17 | #include "auto_home.h" |
| 18 | #include "generic-conf.h" |
| 19 | |
| 20 | #define FATAL "dnscache-conf: fatal: " |
| 21 | |
| 22 | void usage(void) |
| 23 | { |
| 24 | strerr_die1x(100,"dnscache-conf: usage: dnscache-conf acct logacct /dnscache [ myip ]"); |
| 25 | } |
| 26 | |
| 27 | int fdrootservers; |
| 28 | char rootserversbuf[64]; |
| 29 | buffer ssrootservers; |
| 30 | |
| 31 | char *dir; |
| 32 | char *user; |
| 33 | char *loguser; |
| 34 | struct passwd *pw; |
| 35 | const char *myip; |
| 36 | |
| 37 | uint32 seed[32]; |
| 38 | int seedpos = 0; |
| 39 | |
| 40 | void seed_adduint32(uint32 u) |
| 41 | { |
| 42 | int i; |
| 43 | |
| 44 | seed[seedpos] += u; |
| 45 | if (++seedpos == 32) { |
| 46 | for (i = 0;i < 32;++i) { |
| 47 | u = ((u ^ seed[i]) + 0x9e3779b9) ^ (u << 7) ^ (u >> 25); |
| 48 | seed[i] = u; |
| 49 | } |
| 50 | seedpos = 0; |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | void seed_addtime(void) |
| 55 | { |
| 56 | struct taia t; |
| 57 | char tpack[TAIA_PACK]; |
| 58 | int i; |
| 59 | |
| 60 | taia_now(&t); |
| 61 | taia_pack(tpack,&t); |
| 62 | for (i = 0;i < TAIA_PACK;++i) |
| 63 | seed_adduint32(tpack[i]); |
| 64 | } |
| 65 | |
| 66 | int main(int argc,char **argv) |
| 67 | { |
| 68 | seed_addtime(); |
| 69 | seed_adduint32(getpid()); |
| 70 | seed_adduint32(getppid()); |
| 71 | seed_adduint32(getuid()); |
| 72 | seed_adduint32(getgid()); |
| 73 | |
| 74 | user = argv[1]; |
| 75 | if (!user) usage(); |
| 76 | loguser = argv[2]; |
| 77 | if (!loguser) usage(); |
| 78 | dir = argv[3]; |
| 79 | if (!dir) usage(); |
| 80 | if (dir[0] != '/') usage(); |
| 81 | myip = argv[4]; |
| 82 | if (!myip) myip = "127.0.0.1"; |
| 83 | |
| 84 | pw = getpwnam(loguser); |
| 85 | seed_addtime(); |
| 86 | if (!pw) |
| 87 | strerr_die3x(111,FATAL,"unknown account ",loguser); |
| 88 | |
| 89 | if (chdir(auto_home) == -1) |
| 90 | strerr_die4sys(111,FATAL,"unable to switch to ",auto_home,": "); |
| 91 | |
| 92 | fdrootservers = open_read("/etc/dnsroots.local"); |
| 93 | if (fdrootservers == -1) { |
| 94 | if (errno != error_noent) |
| 95 | strerr_die2sys(111,FATAL,"unable to open /etc/dnsroots.local: "); |
| 96 | fdrootservers = open_read("/etc/dnsroots.global"); |
| 97 | if (fdrootservers == -1) |
| 98 | strerr_die2sys(111,FATAL,"unable to open /etc/dnsroots.global: "); |
| 99 | } |
| 100 | |
| 101 | init(dir,FATAL); |
| 102 | |
| 103 | seed_addtime(); makedir("log"); |
| 104 | seed_addtime(); perm(02755); |
| 105 | seed_addtime(); makedir("log/main"); |
| 106 | seed_addtime(); owner(pw->pw_uid,pw->pw_gid); |
| 107 | seed_addtime(); perm(02755); |
| 108 | seed_addtime(); start("log/status"); finish(); |
| 109 | seed_addtime(); owner(pw->pw_uid,pw->pw_gid); |
| 110 | seed_addtime(); perm(0644); |
| 111 | seed_addtime(); makedir("env"); |
| 112 | seed_addtime(); perm(02755); |
| 113 | seed_addtime(); start("env/ROOT"); outs(dir); outs("/root\n"); finish(); |
| 114 | seed_addtime(); perm(0644); |
| 115 | seed_addtime(); start("env/IP"); outs(myip); outs("\n"); finish(); |
| 116 | seed_addtime(); perm(0644); |
| 117 | seed_addtime(); start("env/IPSEND"); outs("0.0.0.0\n"); finish(); |
| 118 | seed_addtime(); perm(0644); |
| 119 | seed_addtime(); start("env/CACHESIZE"); outs("1000000\n"); finish(); |
| 120 | seed_addtime(); perm(0644); |
| 121 | seed_addtime(); start("env/DATALIMIT"); outs("3000000\n"); finish(); |
| 122 | seed_addtime(); perm(0644); |
| 123 | seed_addtime(); start("run"); |
| 124 | outs("#!/bin/sh\nexec 2>&1\nexec <seed\nexec envdir ./env sh -c '\n exec envuidgid "); outs(user); |
| 125 | outs(" softlimit -o250 -d \"$DATALIMIT\" "); |
| 126 | outs(auto_home); outs("/bin/dnscache\n'\n"); finish(); |
| 127 | seed_addtime(); perm(0755); |
| 128 | seed_addtime(); start("log/run"); |
| 129 | outs("#!/bin/sh\nexec setuidgid "); outs(loguser); |
| 130 | outs(" multilog t ./main\n"); finish(); |
| 131 | seed_addtime(); perm(0755); |
| 132 | seed_addtime(); makedir("root"); |
| 133 | seed_addtime(); perm(02755); |
| 134 | seed_addtime(); makedir("root/ip"); |
| 135 | seed_addtime(); perm(02755); |
| 136 | seed_addtime(); start("root/ip/127.0.0.1"); finish(); |
| 137 | seed_addtime(); perm(0600); |
| 138 | seed_addtime(); makedir("root/servers"); |
| 139 | seed_addtime(); perm(02755); |
| 140 | seed_addtime(); start("root/servers/@"); |
| 141 | buffer_init(&ssrootservers,buffer_unixread,fdrootservers,rootserversbuf,sizeof rootserversbuf); |
| 142 | copyfrom(&ssrootservers); |
| 143 | finish(); |
| 144 | seed_addtime(); perm(0644); |
| 145 | seed_addtime(); |
| 146 | |
| 147 | start("seed"); out((char *) seed,128); finish(); |
| 148 | perm(0600); |
| 149 | |
| 150 | #ifdef HASDEVTCP |
| 151 | makedir("root/etc"); |
| 152 | perm(02755); |
| 153 | makedir("root/dev"); |
| 154 | perm(02755); |
| 155 | start("root/etc/netconfig"); |
| 156 | outs("tcp tpi_cots_ord v inet tcp /dev/tcp -\n"); |
| 157 | outs("udp tpi_clts v inet udp /dev/udp -\n"); |
| 158 | finish(); |
| 159 | perm(0645); |
| 160 | umask(000); |
| 161 | if (mknod("root/dev/tcp",S_IFCHR | 0667,makedev(11,42)) == -1) |
| 162 | strerr_die4sys(111,FATAL,"unable to create device ",dir,"/root/dev/tcp: "); |
| 163 | if (mknod("root/dev/udp",S_IFCHR | 0667,makedev(11,41)) == -1) |
| 164 | strerr_die4sys(111,FATAL,"unable to create device ",dir,"/root/dev/udp: "); |
| 165 | umask(022); |
| 166 | #endif |
| 167 | |
| 168 | _exit(0); |
| 169 | } |