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 }