mdw@git.distorted.org.uk Git - qmail/blob - qmail-start.c

   1 #include "fd.h"
   2 #include "prot.h"
   3 #include "exit.h"
   4 #include "fork.h"
   5 #include "auto_uids.h"
   6
   7 char *(qsargs[]) = { "qmail-send", 0 };
   8 char *(qcargs[]) = { "qmail-clean", 0 };
   9 char *(qlargs[]) = { "qmail-lspawn", "./Mailbox", 0 };
  10 char *(qrargs[]) = { "qmail-rspawn", 0 };
  11
  12 void die() { _exit(111); }
  13
  14 int pi0[2];
  15 int pi1[2];
  16 int pi2[2];
  17 int pi3[2];
  18 int pi4[2];
  19 int pi5[2];
  20 int pi6[2];
  21
  22 void close23456() { close(2); close(3); close(4); close(5); close(6); }
  23
  24 void closepipes() {
  25   close(pi1[0]); close(pi1[1]); close(pi2[0]); close(pi2[1]);
  26   close(pi3[0]); close(pi3[1]); close(pi4[0]); close(pi4[1]);
  27   close(pi5[0]); close(pi5[1]); close(pi6[0]); close(pi6[1]);
  28 }
  29
  30 void main(argc,argv)
  31 int argc;
  32 char **argv;
  33 {
  34   if (chdir("/") == -1) die();
  35   umask(077);
  36   if (prot_gid(auto_gidq) == -1) die();
  37
  38   if (fd_copy(2,0) == -1) die();
  39   if (fd_copy(3,0) == -1) die();
  40   if (fd_copy(4,0) == -1) die();
  41   if (fd_copy(5,0) == -1) die();
  42   if (fd_copy(6,0) == -1) die();
  43
  44   if (argv[1]) {
  45     qlargs[1] = argv[1];
  46     ++argv;
  47   }
  48
  49   if (argv[1]) {
  50     if (pipe(pi0) == -1) die();
  51     switch(fork()) {
  52       case -1:
  53         die();
  54       case 0:
  55         if (prot_gid(auto_gidn) == -1) die();
  56         if (prot_uid(auto_uidl) == -1) die();
  57         close(pi0[1]);
  58         if (fd_move(0,pi0[0]) == -1) die();
  59         close23456();
  60         execvp(argv[1],argv + 1);
  61         die();
  62     }
  63     close(pi0[0]);
  64     if (fd_move(1,pi0[1]) == -1) die();
  65   }
  66
  67   if (pipe(pi1) == -1) die();
  68   if (pipe(pi2) == -1) die();
  69   if (pipe(pi3) == -1) die();
  70   if (pipe(pi4) == -1) die();
  71   if (pipe(pi5) == -1) die();
  72   if (pipe(pi6) == -1) die();
  73
  74   switch(fork()) {
  75     case -1: die();
  76     case 0:
  77       if (fd_copy(0,pi1[0]) == -1) die();
  78       if (fd_copy(1,pi2[1]) == -1) die();
  79       close23456();
  80       closepipes();
  81       execvp(*qlargs,qlargs);
  82       die();
  83   }
  84
  85   switch(fork()) {
  86     case -1: die();
  87     case 0:
  88       if (prot_uid(auto_uidr) == -1) die();
  89       if (fd_copy(0,pi3[0]) == -1) die();
  90       if (fd_copy(1,pi4[1]) == -1) die();
  91       close23456();
  92       closepipes();
  93       execvp(*qrargs,qrargs);
  94       die();
  95   }
  96
  97   switch(fork()) {
  98     case -1: die();
  99     case 0:
 100       if (prot_uid(auto_uidq) == -1) die();
 101       if (fd_copy(0,pi5[0]) == -1) die();
 102       if (fd_copy(1,pi6[1]) == -1) die();
 103       close23456();
 104       closepipes();
 105       execvp(*qcargs,qcargs);
 106       die();
 107   }
 108
 109   if (prot_uid(auto_uids) == -1) die();
 110   if (fd_copy(0,1) == -1) die();
 111   if (fd_copy(1,pi1[1]) == -1) die();
 112   if (fd_copy(2,pi2[0]) == -1) die();
 113   if (fd_copy(3,pi3[1]) == -1) die();
 114   if (fd_copy(4,pi4[0]) == -1) die();
 115   if (fd_copy(5,pi5[1]) == -1) die();
 116   if (fd_copy(6,pi6[0]) == -1) die();
 117   closepipes();
 118   execvp(*qsargs,qsargs);
 119   die();
 120 }