#include "sig.h"

#include "readwrite.h"

#include "exit.h"

#include "env.h"

#include "error.h"

#include "fork.h"

#include "wait.h"

#include "seek.h"

#include "qmail.h"

#include "strerr.h"

#include "substdio.h"

#include "fmt.h"

#define FATAL "condredirect: fatal: "

struct qmail qqt;

int mywrite(fd,buf,len) int fd; char *buf; int len;

{

  qmail_put(&qqt,buf,len);

  return len;

}

char inbuf[SUBSTDIO_INSIZE];

char outbuf[1];

substdio ssin = SUBSTDIO_FDBUF(read,0,inbuf,sizeof inbuf);

substdio ssout = SUBSTDIO_FDBUF(mywrite,-1,outbuf,sizeof outbuf);

char num[FMT_ULONG];

void main(argc,argv)

int argc;

char **argv;

{

  char *sender;

  char *dtline;

  int pid;

  int wstat;

  char *qqx;

  if (!argv[1] || !argv[2])

    strerr_die1x(100,"condredirect: usage: condredirect newaddress program [ arg ... ]");

  pid = fork();

  if (pid == -1)

    strerr_die2sys(111,FATAL,"unable to fork: ");

  if (pid == 0) {

    execvp(argv[2],argv + 2);

    if (error_temp(errno)) _exit(111);

    _exit(100);

  }

  if (wait_pid(&wstat,pid) == -1)

    strerr_die2x(111,FATAL,"wait failed");

  if (wait_crashed(wstat))

    strerr_die2x(111,FATAL,"child crashed");

  switch(wait_exitcode(wstat)) {

    case 0: break;

    case 111: strerr_die2x(111,FATAL,"temporary child error");

    default: _exit(0);

  }

  if (seek_begin(0) == -1)

    strerr_die2sys(111,FATAL,"unable to rewind: ");

  sig_pipeignore();

  sender = env_get("SENDER");

  if (!sender) strerr_die2x(100,FATAL,"SENDER not set");

  dtline = env_get("DTLINE");

  if (!dtline) strerr_die2x(100,FATAL,"DTLINE not set");

  if (qmail_open(&qqt) == -1)

    strerr_die2sys(111,FATAL,"unable to fork: ");

  qmail_puts(&qqt,dtline);

  if (substdio_copy(&ssout,&ssin) != 0)

    strerr_die2sys(111,FATAL,"unable to read message: ");

  substdio_flush(&ssout);

  num[fmt_ulong(num,qmail_qp(&qqt))] = 0;

  qmail_from(&qqt,sender);

  qmail_to(&qqt,argv[1]);

  qqx = qmail_close(&qqt);

  if (*qqx) strerr_die2x(*qqx == 'D' ? 100 : 111,FATAL,qqx + 1);

  strerr_die2x(99,"condredirect: qp ",num);

}