mdw@git.distorted.org.uk Git - ezmlm/blob - ezmlm-receipt.c

   1 /*$Id: ezmlm-receipt.c,v 1.10 1999/02/05 04:57:44 lindberg Exp $*/
   2 /*$Name: ezmlm-idx-0324 $*/
   3 /* Handles receipts and bounces from sublists at the main list */
   4 /* Set up instead of ezmlm-return in DIR/bouncer of main list */
   5
   6 #include <sys/types.h>
   7 #include "direntry.h"
   8 #include "stralloc.h"
   9 #include "str.h"
  10 #include "env.h"
  11 #include "slurp.h"
  12 #include "getconf.h"
  13 #include "strerr.h"
  14 #include "byte.h"
  15 #include "case.h"
  16 #include "quote.h"
  17 #include "getln.h"
  18 #include "substdio.h"
  19 #include "error.h"
  20 #include "readwrite.h"
  21 #include "fmt.h"
  22 #include "now.h"
  23 #include "seek.h"
  24 #include "idx.h"
  25 #include "errtxt.h"
  26
  27 #define FATAL "ezmlm-receipt: fatal: "
  28 #define INFO "ezmlm-receipt: info: "
  29
  30 void die_usage()
  31 {
  32   strerr_die1x(100,"ezmlm-receipt: usage: ezmlm-receipt [-dD] dir");
  33 }
  34
  35 void die_nomem() { strerr_die2x(111,FATAL,ERR_NOMEM); }
  36
  37 void die_badaddr()
  38 {
  39   strerr_die2x(100,FATAL,ERR_BAD_ADDRESS);
  40 }
  41 void die_trash()
  42 {
  43   strerr_die2x(0,INFO,"trash address");
  44 }
  45
  46 stralloc line = {0};
  47 stralloc quoted = {0};
  48 stralloc intro = {0};
  49 stralloc bounce = {0};
  50 stralloc header = {0};
  51 stralloc failure = {0};
  52 stralloc paragraph = {0};
  53 stralloc ddir = {0};
  54 stralloc outhost = {0};
  55 stralloc outlocal = {0};
  56 stralloc inlocal = {0};
  57 stralloc tagline = {0};
  58 stralloc listaddr = {0};
  59 stralloc fndate = {0};
  60 stralloc fndir = {0};
  61 stralloc fndatenew = {0};
  62
  63 void die_datenew()
  64 { strerr_die4sys(111,FATAL,ERR_WRITE,fndatenew.s,": "); }
  65 void die_msgin()
  66 { strerr_die2sys(111,FATAL,ERR_READ_INPUT); }
  67
  68 char strnum[FMT_ULONG];
  69 char inbuf[1024];
  70 substdio ssin;
  71
  72 char outbuf[256];       /* small - rarely used */
  73 substdio ssout;
  74
  75 unsigned long when;
  76 unsigned long addrno = 0L;
  77
  78 char *sender;
  79 char *dir;
  80 char *workdir;
  81 void **psql = (void **) 0;
  82 stralloc listno = {0};
  83
  84
  85 void doit(addr,msgnum,when,bounce)
  86 /* Just stores address\0nsgnum\0 followed by bounce. File name is          */
  87 /* dttt.ppp[.n], where 'ttt' is a time stamp, 'ppp' the pid, and 'n' the   */
  88 /* number when there are more than 1 addresses in a pre-VERP bounce. In    */
  89 /* this case, the first one is just dttt.ppp, the decond dttt.ppp.2, etc.  */
  90 /* For a main list, bounces come from sublists. They are rare and serious. */
  91 char *addr;
  92 unsigned long msgnum;
  93 unsigned long when;
  94 stralloc *bounce;
  95 {
  96   int fd;
  97   unsigned int pos;
  98   DIR *bouncedir;
  99   direntry *d;
 100   unsigned int no;
 101
 102   if (!stralloc_copys(&fndir,workdir)) die_nomem();
 103   if (!stralloc_cats(&fndir,"/bounce")) die_nomem();
 104   if (!stralloc_0(&fndir)) die_nomem();
 105   bouncedir = opendir(fndir.s);
 106   if (!bouncedir)
 107     if (errno != error_noent)
 108       strerr_die4sys(111,FATAL,ERR_OPEN,line.s,": ");
 109     else
 110       strerr_die3x(111,FATAL,fndir.s,ERR_NOEXIST);
 111
 112   no = MAX_MAIN_BOUNCES;        /* no more than this many allowed */
 113   while (no && (d = readdir(bouncedir))) {
 114     if (str_equal(d->d_name,".")) continue;
 115     if (str_equal(d->d_name,"..")) continue;
 116     --no;
 117   }
 118   closedir(bouncedir);
 119   if (!no)                      /* max no of bounces exceeded */
 120     strerr_die2x(0,INFO,ERR_MAX_BOUNCE);
 121                                 /* save bounce */
 122   if (!stralloc_copys(&fndate,workdir)) die_nomem();
 123   if (!stralloc_cats(&fndate,"/bounce/d")) die_nomem();
 124   pos = fndate.len - 1;
 125   if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,when))) die_nomem();
 126   if (!stralloc_cats(&fndate,".")) die_nomem();
 127   if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,(unsigned long) getpid())))
 128          die_nomem();
 129   if (addrno) { /* so that pre-VERP bounces make a d... file per address */
 130                 /* for the first one we use the std-style fname */
 131     if (!stralloc_cats(&fndate,".")) die_nomem();
 132     if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,addrno))) die_nomem();
 133   }
 134   addrno++;     /* get ready for next */
 135   if (!stralloc_0(&fndate)) die_nomem();
 136   if (!stralloc_copy(&fndatenew,&fndate)) die_nomem();
 137   fndatenew.s[pos] = 'D';
 138
 139   fd = open_trunc(fndatenew.s);
 140   if (fd == -1) die_datenew();
 141   substdio_fdbuf(&ssout,write,fd,outbuf,sizeof(outbuf));
 142   if (substdio_puts(&ssout,addr) == -1) die_datenew();
 143   if (substdio_put(&ssout,"",1) == -1) die_datenew();
 144   if (substdio_put(&ssout,strnum,fmt_ulong(strnum,msgnum)) == -1)
 145         die_datenew();
 146   if (substdio_put(&ssout,"",1) == -1) die_datenew();
 147
 148   if (substdio_puts(&ssout,"Return-Path: <") == -1) die_datenew();
 149   if (!quote2(&quoted,sender)) die_nomem();
 150   if (substdio_put(&ssout,quoted.s,quoted.len) == -1) die_datenew();
 151   if (substdio_puts(&ssout,">\n") == -1) die_datenew();
 152   if (substdio_put(&ssout,bounce->s,bounce->len) == -1) die_datenew();
 153   if (substdio_flush(&ssout) == -1) die_datenew();
 154   if (fsync(fd) == -1) die_datenew();
 155   if (close(fd) == -1) die_datenew(); /* NFS stupidity */
 156   if (rename(fndatenew.s,fndate.s) == -1)
 157     strerr_die6sys(111,FATAL,ERR_MOVE,fndatenew.s," to ",fndate.s,": ");
 158 }
 159
 160 void main(argc,argv)
 161 int argc;
 162 char **argv;
 163 {
 164   char *local;
 165   char *host;
 166   char *action;
 167   char *def;
 168   int flagdig = 1;
 169   int flaghaveintro;
 170   int flaghaveheader;
 171   int match;
 172   unsigned long msgnum;
 173   unsigned int i;
 174   unsigned int len;
 175   char *cp;
 176
 177   umask(022);
 178   sig_pipeignore();
 179
 180   when = (unsigned long) now();
 181
 182   dir = argv[1];
 183   if (!dir) die_usage();
 184   if (*dir == '-') {
 185     if (dir[1] == 'd') {
 186       flagdig = 2;
 187     } else if (dir[1] == 'D') {
 188       flagdig = 0;
 189     } else
 190       die_usage();
 191     dir = argv[2];
 192     if (!dir) die_usage();
 193   }
 194   if (chdir(dir) == -1)
 195     strerr_die4sys(111,FATAL,ERR_SWITCH,dir,": ");
 196
 197   sender = env_get("SENDER");
 198   def = env_get("DEFAULT");
 199   local = env_get("LOCAL");
 200
 201   getconf_line(&outhost,"outhost",1,FATAL,dir);
 202   getconf_line(&outlocal,"outlocal",1,FATAL,dir);
 203   workdir = dir;
 204   if (def) {                            /* qmail>=1.02 */
 205     action = def;                       /* now see if -digest-return- */
 206     if (flagdig == 1) {
 207       flagdig = 0;
 208       if (str_len(local) >= str_len(def) + 14)
 209         if (str_start(local + str_len(local) - 14 - str_len(def),"digest-"))
 210           flagdig = 2;
 211     }
 212   } else {                              /* older version of qmail */
 213     getconf_line(&inlocal,"inlocal",1,FATAL,dir);
 214     if (inlocal.len > str_len(local)) die_badaddr();
 215     if (case_diffb(inlocal.s,inlocal.len,local)) die_badaddr();
 216     action = local + inlocal.len;
 217     if (flagdig == 1) {
 218       flagdig = 0;
 219       if (str_start(action,"-digest")) {
 220         flagdig = 2;
 221         action += 7;
 222       }
 223     }
 224     if (!str_start(action,"-return-")) die_badaddr();
 225     action += 8;
 226   }
 227   if (flagdig) {
 228     if (!stralloc_copys(&ddir,dir)) die_nomem();
 229     if (!stralloc_cats(&ddir,"/digest")) die_nomem();
 230     if (!stralloc_0(&ddir)) die_nomem();
 231     workdir = ddir.s;
 232     if (!stralloc_cats(&outlocal,"-digest")) die_nomem();
 233   }
 234   if (!*action) die_trash();
 235
 236   substdio_fdbuf(&ssin,read,0,inbuf,sizeof(inbuf));
 237
 238   if (!case_diffs(action,"receipt")) {
 239     host = sender + str_rchr(sender,'@');
 240     if (*host)
 241       *(host++) = '\0';
 242     cp = sender;
 243                                 /* check recipient in case it's a bounce*/
 244     while (*(cp++)) {           /* decode sender */
 245       cp += str_chr(cp,'-');
 246       if (case_starts(cp,"-return-")) {
 247         if (!scan_ulong(cp + 8,&msgnum))
 248           strerr_die2x(100,FATAL,"bad VERP format for receipt");
 249          *cp = '\0';
 250         if (!stralloc_copys(&listaddr,sender)) die_nomem();
 251         if (!stralloc_append(&listaddr,"@")) die_nomem();
 252         if (!stralloc_cats(&listaddr,host)) die_nomem();
 253         if (!stralloc_0(&listaddr)) die_nomem();
 254         break;
 255       }
 256     }
 257     for(;;) {                                           /* Get X-tag from hdr*/
 258       if (getln(&ssin,&line,&match,'\n') == -1) die_msgin();
 259       if (!match)
 260         break;
 261
 262       if (line.len == 1) break;
 263       if (case_startb(line.s,line.len,TXT_TAG)) {
 264         len = str_len(TXT_TAG);
 265         if (!stralloc_catb(&tagline,line.s +len,line.len - len -1)) die_nomem();
 266                 /* NOTE: tagline is dirty! We quote it for sql and rely on */
 267                 /* std log clean for maillog */
 268         break;
 269       }
 270     }
 271                 /* feedback ok even if not sub. Will be filtered by subreceipt*/
 272                 /* For instance, main list feedback is ok, but !issub. */
 273     subreceipt(workdir,msgnum,&tagline,listaddr.s,2,INFO,FATAL);
 274     closesql();
 275     _exit(0);
 276   }
 277                                 /* not receipt - maybe bounce */
 278                                 /* no need to lock. dttt.pid can be assumed */
 279                                 /* to be unique and if not would be over- */
 280                                 /* written even with lock */
 281   action += scan_ulong(action,&msgnum);
 282   if (*action != '-') die_badaddr();
 283   ++action;
 284                 /* scan bounce for tag. It'll be in the BODY! */
 285   for (;;) {
 286     if (getln(&ssin,&line,&match,'\n') == -1)
 287       strerr_die2sys(111,FATAL,ERR_READ_INPUT);
 288     if (!match) break;
 289     if (case_startb(line.s,line.len,TXT_TAG)) {
 290       len = str_len(TXT_TAG);
 291       if (!stralloc_catb(&tagline,line.s +len,line.len - len -1)) die_nomem();
 292                 /* NOTE: tagline is dirty! We quote it for sql and rely on */
 293                 /* std log clean for maillog */
 294       break;
 295     }
 296   }
 297   if (seek_begin(0) == -1)
 298     strerr_die2sys(111,FATAL,ERR_SEEK_INPUT);
 299   substdio_fdbuf(&ssin,read,0,inbuf,sizeof(inbuf));
 300
 301   if (*action) {        /* normal bounce */
 302
 303     if (slurpclose(0,&bounce,1024) == -1) die_msgin();
 304     i = str_rchr(action,'=');
 305     if (!stralloc_copyb(&listaddr,action,i)) die_nomem();
 306     if (action[i]) {
 307       if (!stralloc_cats(&listaddr,"@")) die_nomem();
 308       if (!stralloc_cats(&listaddr,action + i + 1)) die_nomem();
 309     }
 310     if (!stralloc_0(&listaddr)) die_nomem();
 311                 /* don't check for sub, since issub() doesn't see sublists */
 312     switch (subreceipt(workdir,msgnum,&tagline,listaddr.s,-1,INFO,FATAL)) {
 313         case -1: strerr_die2x(0,INFO,ERR_COOKIE);
 314         case -2: strerr_die2x(0,INFO,ERR_NOT_ACTIVE);
 315         default: doit(listaddr.s,msgnum,when,&bounce);
 316     }
 317     closesql();
 318     _exit(0);
 319   }                     /* pre-VERP bounce, in QSBMF format */
 320
 321   flaghaveheader = 0;
 322   flaghaveintro = 0;
 323
 324   for (;;) {
 325     if (!stralloc_copys(&paragraph,"")) die_nomem();
 326     for (;;) {
 327       if (getln(&ssin,&line,&match,'\n') == -1)
 328         strerr_die2sys(111,FATAL,ERR_READ_INPUT);
 329       if (!match) die_trash();
 330       if (!stralloc_cat(&paragraph,&line)) die_nomem();
 331       if (line.len <= 1) break;
 332     }
 333
 334     if (!flaghaveheader) {
 335       if (!stralloc_copy(&header,&paragraph)) die_nomem();
 336       flaghaveheader = 1;
 337       continue;
 338     }
 339
 340     if (!flaghaveintro) {
 341       if (paragraph.s[0] == '-' && paragraph.s[1] == '-')
 342         continue;               /* skip MIME boundary if it exists */
 343       if (paragraph.len < 15) die_trash();
 344       if (str_diffn(paragraph.s,"Hi. This is the",15)) die_trash();
 345       if (!stralloc_copy(&intro,&paragraph)) die_nomem();
 346       flaghaveintro = 1;
 347       continue;
 348     }
 349
 350     if (paragraph.s[0] == '-')
 351       break;
 352
 353     if (paragraph.s[0] == '<') {        /* find address */
 354       if (!stralloc_copy(&failure,&paragraph)) die_nomem();
 355
 356       if (!stralloc_copy(&bounce,&header)) die_nomem();
 357       if (!stralloc_cat(&bounce,&intro)) die_nomem();
 358       if (!stralloc_cat(&bounce,&failure)) die_nomem();
 359
 360       i = byte_chr(failure.s,failure.len,'\n');
 361       if (i < 3) die_trash();
 362
 363       if (!stralloc_copyb(&listaddr,failure.s + 1,i - 3)) die_nomem();
 364       if (byte_chr(listaddr.s,listaddr.len,'\0') == listaddr.len) {
 365         if (!stralloc_0(&listaddr)) die_nomem();
 366         if (subreceipt(workdir,msgnum,&tagline,listaddr.s,-1,INFO,FATAL) == 0)
 367           doit(listaddr.s,msgnum,when,&bounce);
 368       }
 369     }
 370   }
 371   closesql();
 372   _exit(0);
 373 }
 374