qmail.c

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#include <unistd.h>
#include "buffer.h"
#include "readwrite.h"
#include "wait.h"
#include "env.h"
#include "str.h"
#include "exit.h"
#include "fd.h"
#include "qmail.h"
#include "auto_qmail.h"
#include "alloc.h"
#include "stralloc.h"
#include "idx.h"
 
#define WHO "qmail"

 
static const char *binqqargs[2] = { PROG_QMAIL_QUEUE, 0 } ;
 
int qmail_open(struct qmail *qq, const stralloc *sa)
{
  int pim[2];
  int pie[2];
  unsigned i,j;
  const char *cp;
  const char **cpp;
 
  qq->msgsize = 0L;
  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);
              if ((cp = env_get("QMAILQUEUE")) != 0)
                binqqargs[0] = cp;
              else if (sa && sa->len) {          /* count args */
                j = 2;                           /* empty sa - qmqpc c control args */
                for (i = 0; i < sa->len; i++) {
                 if (sa->s[i] == '\0') j++;
                }                                /* make space */
                if (!(cpp = (const char **) alloc(j * sizeof (char *)))) _exit(51);
                cpp[0] = PROG_QMAIL_QMQPC;
                cp = sa->s;
                j = 1;
                for (i = 0; i < sa->len; i++) {
                  if (sa->s[i]) continue;
                  cpp[j++] = cp;
                  cp = sa->s + i + 1;
                }
                cpp[j] = (char *) 0;
                execv(*cpp,(char**)cpp);  // FIXME
               _exit(120);
             }
             execv(*binqqargs,(char**)binqqargs);
             _exit(120);
  }
 
  qq->fdm = pim[1]; close(pim[0]);
  qq->fde = pie[1]; close(pie[0]);
  buffer_init(&qq->ss,buffer_unixwrite,qq->fdm,qq->buf,sizeof(qq->buf));
  qq->flagerr = 0;
  return 0;
}
 
unsigned long qmail_qp(struct qmail *qq)
{
  return qq->pid;
}
 
void qmail_fail(struct qmail *qq)
{
  qq->flagerr = 1;
}
 
void qmail_put(struct qmail *qq, const char *s, int len)
{
  if (!qq->flagerr) 
    if (buffer_put(&qq->ss,s,len) == -1) qq->flagerr = 1;
  qq->msgsize += len;
}
 
void qmail_puts(struct qmail *qq, const char *s)
{
  if (!qq->flagerr) {
    int len = str_len(s);
    if (buffer_put(&qq->ss,s,len) == -1) qq->flagerr = 1;
    qq->msgsize += len;
  }
}
 
void qmail_from(struct qmail *qq, const char *s)
{
  if (buffer_flush(&qq->ss) == -1) qq->flagerr = 1;
  close(qq->fdm);
  buffer_init(&qq->ss,buffer_unixwrite,qq->fde,qq->buf,sizeof(qq->buf));
  qmail_put(qq,"F",1);
  qmail_puts(qq,s);
  qmail_put(qq,"",1);
}
 
void qmail_to(struct qmail *qq, const char *s)
{
  qmail_put(qq,"T",1);
  qmail_puts(qq,s);
  qmail_put(qq,"",1);
}
 
const char *qmail_close(struct qmail *qq)
{
  int wstat;
  int exitcode;
 
  qmail_put(qq,"",1);
  if (!qq->flagerr) if (buffer_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) {  // FIXME
    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 115: /* compatibility */
    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)";
  }
}