#include "substdio.h"

#include "readwrite.h"

#include "wait.h"

#include "exit.h"

#include "fork.h"

#include "fd.h"

#include "qmail.h"

#include "auto_qmail.h"

static char *binqqargs[2] = { "bin/qmail-queue", 0 } ;

int qmail_open(qq)

struct qmail *qq;

{

  int pim[2];

  int pie[2];

  if (pipe(pim) == -1) return -1;

  if (pipe(pie) == -1) { close(pim[0]); close(pim[1]); return -1; }

  switch(qq->pid = vfork()) {

    case -1:

      close(pim[0]); close(pim[1]);

      close(pie[0]); close(pie[1]);

      return -1;

    case 0:

      close(pim[1]);

      close(pie[1]);

      if (fd_move(0,pim[0]) == -1) _exit(120);

      if (fd_move(1,pie[0]) == -1) _exit(120);

      if (chdir(auto_qmail) == -1) _exit(61);

      execv(*binqqargs,binqqargs);

      _exit(120);

  }

  qq->fdm = pim[1]; close(pim[0]);

  qq->fde = pie[1]; close(pie[0]);

  substdio_fdbuf(&qq->ss,write,qq->fdm,qq->buf,sizeof(qq->buf));

  qq->flagerr = 0;

  return 0;

}

unsigned long qmail_qp(qq) struct qmail *qq;

{

  return qq->pid;

}

void qmail_fail(qq) struct qmail *qq;

{

  qq->flagerr = 1;

}

void qmail_put(qq,s,len) struct qmail *qq; char *s; int len;

{

  if (!qq->flagerr) if (substdio_put(&qq->ss,s,len) == -1) qq->flagerr = 1;

}

void qmail_puts(qq,s) struct qmail *qq; char *s;

{

  if (!qq->flagerr) if (substdio_puts(&qq->ss,s) == -1) qq->flagerr = 1;

}

void qmail_from(qq,s) struct qmail *qq; char *s;

{

  if (substdio_flush(&qq->ss) == -1) qq->flagerr = 1;

  close(qq->fdm);

  substdio_fdbuf(&qq->ss,write,qq->fde,qq->buf,sizeof(qq->buf));

  qmail_put(qq,"F",1);

  qmail_puts(qq,s);

  qmail_put(qq,"",1);

}

void qmail_to(qq,s) struct qmail *qq; char *s;

{

  qmail_put(qq,"T",1);

  qmail_puts(qq,s);

  qmail_put(qq,"",1);

}

char *qmail_close(qq)

struct qmail *qq;

{

  int wstat;

  int exitcode;

  qmail_put(qq,"",1);

  if (!qq->flagerr) if (substdio_flush(&qq->ss) == -1) qq->flagerr = 1;

  close(qq->fde);

  if (wait_pid(&wstat,qq->pid) != qq->pid)

    return "Zqq waitpid surprise (#4.3.0)";

  if (wait_crashed(wstat))

    return "Zqq crashed (#4.3.0)";

  exitcode = wait_exitcode(wstat);

  switch(exitcode) {

    case 115: /* compatibility */

    case 11: return "Denvelope address too long for qq (#5.1.3)";

    case 31: return "Dmail server permanently rejected message (#5.3.0)";

    case 51: return "Zqq out of memory (#4.3.0)";

    case 52: return "Zqq timeout (#4.3.0)";

    case 53: return "Zqq write error or disk full (#4.3.0)";

    case 0: if (!qq->flagerr) return ""; /* fall through */

    case 54: return "Zqq read error (#4.3.0)";

    case 55: return "Zqq unable to read configuration (#4.3.0)";

    case 56: return "Zqq trouble making network connection (#4.3.0)";

    case 61: return "Zqq trouble in home directory (#4.3.0)";

    case 63:

    case 64:

    case 65:

    case 66:

    case 62: return "Zqq trouble creating files in queue (#4.3.0)";

    case 71: return "Zmail server temporarily rejected message (#4.3.0)";

    case 72: return "Zconnection to mail server timed out (#4.4.1)";

    case 73: return "Zconnection to mail server rejected (#4.4.1)";

    case 74: return "Zcommunication with mail server failed (#4.4.2)";

    case 91: /* fall through */

    case 81: return "Zqq internal bug (#4.3.0)";

    case 120: return "Zunable to exec qq (#4.3.0)";

    default:

      if ((exitcode >= 11) && (exitcode <= 40))

	return "Dqq permanent problem (#5.3.0)";

      return "Zqq temporary problem (#4.3.0)";

  }

}