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

   1 #include "sig.h"
   2 #include "readwrite.h"
   3 #include "exit.h"
   4 #include "env.h"
   5 #include "error.h"
   6 #include "fork.h"
   7 #include "wait.h"
   8 #include "seek.h"
   9 #include "qmail.h"
  10 #include "stralloc.h"
  11 #include "subfd.h"
  12 #include "substdio.h"
  13
  14 void die_success() { _exit(0); }
  15 void die_99() { _exit(99); }
  16 void die_perm(s) char *s; { substdio_putsflush(subfderr,s); _exit(100); }
  17 void die_temp(s) char *s; { substdio_putsflush(subfderr,s); _exit(111); }
  18 void die_nomem() { die_temp("condredirect: fatal: out of memory\n"); }
  19
  20 struct qmail qqt;
  21
  22 int mywrite(fd,buf,len) int fd; char *buf; int len;
  23 {
  24  qmail_put(&qqt,buf,len);
  25  return len;
  26 }
  27
  28 substdio ssin;
  29 substdio ssout;
  30 char inbuf[SUBSTDIO_INSIZE];
  31 char outbuf[16];
  32
  33 void main(argc,argv)
  34 int argc;
  35 char **argv;
  36 {
  37  char *sender;
  38  char *dtline;
  39  int pid;
  40  int wstat;
  41
  42  if (!argv[1] || !argv[2])
  43    die_perm("condredirect: usage: condredirect newaddress program arg ...\n");
  44
  45  switch(pid = fork())
  46   {
  47    case -1: die_temp("condredirect: fatal: unable to fork\n");
  48    case 0:
  49      execvp(argv[2],argv + 2);
  50      if (error_temp(errno)) _exit(111);
  51      _exit(100);
  52   }
  53  if (wait_pid(&wstat,pid) != pid)
  54    die_perm("condredirect: fatal: internal bug\n");
  55  if (wait_crashed(wstat)) die_temp("condredirect: fatal: child crashed\n");
  56  switch(wait_exitcode(wstat))
  57   {
  58    case 0: break;
  59    case 111: die_temp("condredirect: fatal: temporary child error\n");
  60    default: die_success();
  61   }
  62
  63  if (seek_begin(0) == -1) die_temp("condredirect: fatal: unable to rewind\n");
  64  sig_pipeignore();
  65
  66  sender = env_get("SENDER");
  67  if (!sender) die_perm("condredirect: fatal: SENDER not set\n");
  68  dtline = env_get("DTLINE");
  69  if (!dtline) die_perm("condredirect: fatal: DTLINE not set\n");
  70
  71  if (qmail_open(&qqt) == -1) die_temp("condredirect: fatal: unable to fork\n");
  72  qmail_puts(&qqt,dtline);
  73  substdio_fdbuf(&ssin,read,0,inbuf,sizeof(inbuf));
  74  substdio_fdbuf(&ssout,mywrite,-1,outbuf,sizeof(outbuf));
  75  if (substdio_copy(&ssout,&ssin) != 0)
  76    die_temp("condredirect: fatal: error while reading message\n");
  77  substdio_flush(&ssout);
  78
  79  qmail_from(&qqt,sender);
  80  qmail_to(&qqt,argv[1]);
  81  switch(qmail_close(&qqt))
  82   {
  83    case 0: die_99();
  84    case QMAIL_TOOLONG: die_perm("condredirect: fatal: permanent qmail-queue error\n");
  85    default: die_temp("condredirect: fatal: temporary qmail-queue error\n");
  86   }
  87 }