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#include <unistd.h>
#include "alloc.h"
#include "buffer.h"
#include "env.h"
#include "error.h"
#include "exit.h"
#include "getln.h"
#include "open.h"
#include "sig.h"
#include "str.h"
#include "stralloc.h"
#include "headerbody.h"
#include "hfield.h"
#include "qmail.h"
#include "quote.h"
#include "token822.h"
#define WHO "qreceipt"
static void die_noreceipt()
{
_exit(0);
}
static void die()
{
_exit(100);
}
static void die_temp()
{
_exit(111);
}
static void die_nomem()
{
buffer_putsflush(buffer_2, "qreceipt: fatal: out of memory\n");
die_temp();
}
static void die_fork()
{
buffer_putsflush(buffer_2, "qreceipt: fatal: unable to fork\n");
die_temp();
}
static void die_qqperm()
{
buffer_putsflush(buffer_2, "qreceipt: fatal: permanent qmail-queue error\n");
die();
}
static void die_qqtemp()
{
buffer_putsflush(buffer_2, "qreceipt: fatal: temporary qmail-queue error\n");
die_temp();
}
static void die_usage()
{
buffer_putsflush(buffer_2, "qreceipt: usage: qreceipt deliveryaddress\n");
die();
}
static void die_read()
{
if (errno == ENOMEM) die_nomem();
buffer_putsflush(buffer_2, "qreceipt: fatal: read error\n");
die_temp();
}
static void doordie(stralloc *sa, int r)
{
if (r == 1) return;
if (r == -1) die_nomem();
buffer_putsflush(buffer_2, "qreceipt: fatal: unable to parse this: ");
buffer_putflush(buffer_2, sa->s, sa->len);
die();
}
char *target;
int flagreceipt = 0;
char *returnpath;
stralloc messageid = {0};
stralloc sanotice = {0};
static int rwnotice(token822_alloc *addr)
{
token822_reverse(addr);
if (token822_unquote(&sanotice, addr) != 1) die_nomem();
if (sanotice.len == str_len(target))
if (!str_diffn(sanotice.s, target, sanotice.len)) flagreceipt = 1;
token822_reverse(addr);
return 1;
}
struct qmail qqt;
stralloc quoted = {0};
static void finishheader()
{
char *qqx;
if (!flagreceipt) die_noreceipt();
if (str_equal(returnpath, "")) die_noreceipt();
if (str_equal(returnpath, "#@[]")) die_noreceipt();
if (!quote2("ed, returnpath)) die_nomem();
if (qmail_open(&qqt) == -1) die_fork();
qmail_puts(&qqt, "From: DELIVERY NOTICE SYSTEM <");
qmail_put(&qqt, quoted.s, quoted.len);
qmail_puts(&qqt, ">\n");
qmail_puts(&qqt, "To: <");
qmail_put(&qqt, quoted.s, quoted.len);
qmail_puts(&qqt, ">\n");
qmail_puts(
&qqt,
"Subject: success notice\n\n"
"Hi! This is the qreceipt program. Your message was delivered to the\n"
"following address: ");
qmail_puts(&qqt, target);
qmail_puts(&qqt, ". Thanks for asking.\n");
if (messageid.s) {
qmail_puts(&qqt, "Your ");
qmail_put(&qqt, messageid.s, messageid.len);
}
qmail_from(&qqt, "");
qmail_to(&qqt, returnpath);
qqx = qmail_close(&qqt);
if (*qqx) {
if (*qqx == 'D')
die_qqperm();
else
die_qqtemp();
}
}
stralloc hfbuf = {0};
token822_alloc hfin = {0};
token822_alloc hfrewrite = {0};
token822_alloc hfaddr = {0};
static void doheaderfield(stralloc *h)
{
switch (hfield_known(h->s, h->len)) {
case H_MESSAGEID:
if (!stralloc_copy(&messageid, h)) die_nomem();
break;
case H_NOTICEREQUESTEDUPONDELIVERYTO:
doordie(h, token822_parse(&hfin, h, &hfbuf));
doordie(h, token822_addrlist(&hfrewrite, &hfaddr, &hfin, rwnotice));
break;
}
}
static void dobody(stralloc *h) {}
int main(int argc, char **argv)
{
sig_pipeignore();
if (!(target = argv[1])) die_usage();
if (!(returnpath = env_get("SENDER"))) die_usage();
if (headerbody(buffer_0, doheaderfield, finishheader, dobody) == -1) die_read();
die_noreceipt();
}
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