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

   1 /*$Id: ezmlm-return.c,v 1.26 1999/08/07 20:50:52 lindberg Exp $*/
   2 /*$Name: ezmlm-idx-040 $*/
   3 #include <sys/types.h>
   4 #include "direntry.h"
   5 #include "stralloc.h"
   6 #include "str.h"
   7 #include "env.h"
   8 #include "sig.h"
   9 #include "slurp.h"
  10 #include "getconf.h"
  11 #include "strerr.h"
  12 #include "byte.h"
  13 #include "case.h"
  14 #include "getln.h"
  15 #include "substdio.h"
  16 #include "error.h"
  17 #include "quote.h"
  18 #include "readwrite.h"
  19 #include "fmt.h"
  20 #include "now.h"
  21 #include "cookie.h"
  22 #include "subscribe.h"
  23 #include "errtxt.h"
  24 #include "idx.h"
  25
  26 #define FATAL "ezmlm-return: fatal: "
  27 #define INFO "ezmlm-return: info: "
  28 void die_usage()
  29 { strerr_die1x(100,"ezmlm-return: usage: ezmlm-return [-dD] dir"); }
  30 void die_nomem() { strerr_die2x(111,FATAL,ERR_NOMEM); }
  31 void die_badaddr()
  32 {
  33   strerr_die2x(100,FATAL,ERR_BAD_RETURN_ADDRESS);
  34 }
  35 void die_trash()
  36 {
  37   strerr_die2x(99,INFO,"trash address");
  38 }
  39
  40 char outbuf[1024];
  41 substdio ssout;
  42 char inbuf[1024];
  43 substdio ssin;
  44
  45 char strnum[FMT_ULONG];
  46 char hash[COOKIE];
  47 char hashcopy[COOKIE];
  48 char *hashp = (char *) 0;
  49 unsigned long cookiedate;
  50 unsigned long addrno = 0L;
  51 unsigned long addrno1 = 0L;
  52 stralloc fndir = {0};
  53 stralloc fndate = {0};
  54 stralloc fndatenew = {0};
  55 stralloc fnhash = {0};
  56 stralloc fnhashnew = {0};
  57 void *psql = (void *) 0;
  58
  59 stralloc quoted = {0};
  60 stralloc ddir = {0};
  61 char *sender;
  62 char *dir;
  63 char *workdir;
  64
  65 void die_hashnew()
  66 { strerr_die4sys(111,FATAL,ERR_WRITE,fnhashnew.s,": "); }
  67 void die_datenew()
  68 { strerr_die4sys(111,FATAL,ERR_WRITE,fndatenew.s,": "); }
  69 void die_msgin()
  70 { strerr_die2sys(111,FATAL,ERR_READ_INPUT); }
  71
  72 void makedir(s)
  73 char *s;
  74 {
  75   if (mkdir(s,0755) == -1)
  76     if (errno != error_exist)
  77       strerr_die4x(111,FATAL,ERR_CREATE,s,": ");
  78 }
  79
  80 void dowit(addr,when,bounce)
  81 char *addr;
  82 unsigned long when;
  83 stralloc *bounce;
  84 {
  85   int fd;
  86   unsigned int wpos;
  87   unsigned long wdir,wfile;
  88
  89   if (!issub(workdir,addr,(char *) 0,FATAL)) return;
  90
  91   if (!stralloc_copys(&fndate,workdir)) die_nomem();
  92   if (!stralloc_cats(&fndate,"/bounce/d")) die_nomem();
  93   if (!stralloc_0(&fndate)) die_nomem();
  94   fndate.s[fndate.len - 1] = '/';       /* replace '\0' */
  95   wpos = fndate.len - 1;
  96   wdir = when / 10000;
  97   wfile = when - 10000 * wdir;
  98   if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,wdir))) die_nomem();
  99   if (!stralloc_0(&fndate)) die_nomem();
 100   makedir(fndate.s);
 101   --fndate.len;                         /* remove terminal '\0' */
 102   if (!stralloc_cats(&fndate,"/w")) die_nomem();
 103   wpos = fndate.len - 1;
 104   if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,wfile))) die_nomem();
 105   if (!stralloc_cats(&fndate,".")) die_nomem();
 106   if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,(unsigned long) getpid())))
 107         die_nomem();
 108   if (!stralloc_0(&fndate)) die_nomem();
 109   if (!stralloc_copy(&fndatenew,&fndate)) die_nomem();
 110   fndatenew.s[wpos] = 'W';
 111
 112   fd = open_trunc(fndatenew.s);
 113   if (fd == -1) die_datenew();
 114   substdio_fdbuf(&ssout,write,fd,outbuf,sizeof(outbuf));
 115   if (substdio_puts(&ssout,addr) == -1) die_datenew();
 116   if (substdio_put(&ssout,"",1) == -1) die_datenew();
 117   if (substdio_puts(&ssout,"Return-Path: <") == -1) die_datenew();
 118   if (!quote2(&quoted,sender)) die_nomem();
 119   if (substdio_put(&ssout,quoted.s,quoted.len) == -1) die_datenew();
 120   if (substdio_puts(&ssout,">\n") == -1) die_datenew();
 121   if (substdio_put(&ssout,bounce->s,bounce->len) == -1) die_datenew();
 122   if (substdio_flush(&ssout) == -1) die_datenew();
 123   if (fsync(fd) == -1) die_datenew();
 124   if (close(fd) == -1) die_datenew(); /* NFS stupidity */
 125
 126   if (rename(fndatenew.s,fndate.s) == -1)
 127     strerr_die6sys(111,FATAL,ERR_MOVE,fndatenew.s," to ",fndate.s,": ");
 128 }
 129
 130 void doit(addr,msgnum,when,bounce)
 131 char *addr;
 132 unsigned long msgnum;
 133 unsigned long when;
 134 stralloc *bounce;
 135 {
 136   int fd;
 137   int fdnew;
 138   unsigned int pos;
 139   unsigned long ddir,dfile;
 140
 141   if (!issub(workdir,addr,(char *) 0,FATAL)) return;
 142
 143   if (!stralloc_copys(&fndate,workdir)) die_nomem();
 144   if (!stralloc_cats(&fndate,"/bounce/d")) die_nomem();
 145   if (!stralloc_0(&fndate)) die_nomem();
 146   makedir(fndate.s);
 147   fndate.s[fndate.len-1] = '/';         /* replace terminal '\0' */
 148   ddir = when / 10000;
 149   dfile = when - 10000 * ddir;
 150   if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,ddir))) die_nomem();
 151   if (!stralloc_copy(&fndir,&fndate)) die_nomem();
 152   if (!stralloc_0(&fndir)) die_nomem(); /* make later if necessary (new addr)*/
 153   if (!stralloc_cats(&fndate,"/d")) die_nomem();
 154   pos = fndate.len - 2;
 155   if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,dfile))) die_nomem();
 156   if (!stralloc_cats(&fndate,".")) die_nomem();
 157   if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,(unsigned long) getpid())))
 158          die_nomem();
 159   if (addrno) { /* so that pre-VERP bounces make a d... file per address */
 160                 /* for the first one we use the std-style fname */
 161     if (!stralloc_cats(&fndate,".")) die_nomem();
 162     if (!stralloc_catb(&fndate,strnum,fmt_ulong(strnum,addrno))) die_nomem();
 163   }
 164   addrno++;     /* get ready for next */
 165   if (!stralloc_0(&fndate)) die_nomem();
 166   if (!stralloc_copy(&fndatenew,&fndate)) die_nomem();
 167   fndatenew.s[pos] = '_';       /* fndate = bounce/d/nnnn/dmmmmmm */
 168                                 /* fndatenew = bounce/d/nnnn_dmmmmmm */
 169
 170   fd = open_trunc(fndatenew.s);
 171   if (fd == -1) die_datenew();
 172   substdio_fdbuf(&ssout,write,fd,outbuf,sizeof(outbuf));
 173   if (substdio_puts(&ssout,addr) == -1) die_datenew();
 174   if (substdio_put(&ssout,"",1) == -1) die_datenew();
 175   if (substdio_puts(&ssout,"Return-Path: <") == -1) die_datenew();
 176   if (!quote2(&quoted,sender)) die_nomem();
 177   if (substdio_put(&ssout,quoted.s,quoted.len) == -1) die_datenew();
 178   if (substdio_puts(&ssout,">\n") == -1) die_datenew();
 179   if (substdio_put(&ssout,bounce->s,bounce->len) == -1) die_datenew();
 180   if (substdio_flush(&ssout) == -1) die_datenew();
 181   if (fsync(fd) == -1) die_datenew();
 182   if (close(fd) == -1) die_datenew(); /* NFS stupidity */
 183
 184   cookie(hash,"",0,"",addr,"");
 185   if (!stralloc_copys(&fnhash,workdir)) die_nomem();
 186   if (!stralloc_cats(&fnhash,"/bounce/h")) die_nomem();
 187   if (!stralloc_0(&fnhash)) die_nomem();
 188   makedir(fnhash.s);
 189   fnhash.s[fnhash.len - 1] = '/';               /* replace terminal '\0' */
 190   if (!stralloc_catb(&fnhash,hash,1)) die_nomem();
 191   if (!stralloc_0(&fnhash)) die_nomem();
 192   makedir(fnhash.s);
 193   --fnhash.len;                                 /* remove terminal '\0' */
 194   if (!stralloc_cats(&fnhash,"/h")) die_nomem();
 195   pos = fnhash.len - 1;
 196   if (!stralloc_catb(&fnhash,hash+1,COOKIE-1)) die_nomem();
 197   if (!stralloc_0(&fnhash)) die_nomem();
 198   if (!stralloc_copy(&fnhashnew,&fnhash)) die_nomem();
 199   fnhashnew.s[pos] = 'H';
 200
 201   fdnew = open_trunc(fnhashnew.s);
 202   if (fdnew == -1) die_hashnew();
 203   substdio_fdbuf(&ssout,write,fdnew,outbuf,sizeof(outbuf));
 204
 205   fd = open_read(fnhash.s);
 206   if (fd == -1) {
 207     if (errno != error_noent)
 208       strerr_die4sys(111,FATAL,ERR_READ,fnhash.s,": ");
 209     makedir(fndir.s);
 210     if (rename(fndatenew.s,fndate.s) == -1)
 211       strerr_die6sys(111,FATAL,ERR_MOVE,fndatenew.s," to ",fndate.s,": ");
 212   }
 213   else {
 214     substdio_fdbuf(&ssin,read,fd,inbuf,sizeof(inbuf));
 215     switch(substdio_copy(&ssout,&ssin)) {
 216       case -2: die_msgin();
 217       case -3: die_hashnew();
 218     }
 219     close(fd);
 220     if (unlink(fndatenew.s) == -1)
 221       strerr_die4sys(111,FATAL,ERR_DELETE,fndatenew.s,": ");
 222   }
 223   if (substdio_puts(&ssout,"   ") == -1) die_hashnew();
 224   if (substdio_put(&ssout,strnum,fmt_ulong(strnum,msgnum)) == -1) die_hashnew();
 225   if (substdio_puts(&ssout,"\n") == -1) die_hashnew();
 226   if (substdio_flush(&ssout) == -1) die_hashnew();
 227   if (fsync(fdnew) == -1) die_hashnew();
 228   if (close(fdnew) == -1) die_hashnew(); /* NFS stupidity */
 229
 230   if (rename(fnhashnew.s,fnhash.s) == -1)
 231     strerr_die6sys(111,FATAL,ERR_MOVE,fnhashnew.s," to ",fnhash.s,": ");
 232 }
 233
 234 stralloc bounce = {0};
 235 stralloc line = {0};
 236 stralloc header = {0};
 237 stralloc intro = {0};
 238 stralloc failure = {0};
 239 stralloc paragraph = {0};
 240 int flagmasterbounce = 0;
 241 int flaghaveheader;
 242 int flaghaveintro;
 243
 244 stralloc key = {0};
 245
 246 char msginbuf[1024];
 247 substdio ssmsgin;
 248
 249 void main(argc,argv)
 250 int argc;
 251 char **argv;
 252 {
 253   char *local;
 254   char *action;
 255   char *def;
 256   char *ret;
 257   char *cp;
 258   unsigned long msgnum;
 259   unsigned long cookiedate;
 260   unsigned long when;
 261   unsigned long listno = 0L;
 262   int match;
 263   unsigned int i;
 264   int flagdig = 0;
 265   int flagmaster = 0;
 266   int flagreceipt = 0;
 267   int fdlock;
 268   register char ch;
 269
 270   umask(022);
 271   sig_pipeignore();
 272   when = (unsigned long) now();
 273
 274   dir = argv[1];
 275   if (!dir) die_usage();
 276   if (*dir == '-') {                    /* for normal use */
 277     if (dir[1] == 'd') {
 278       flagdig = 1;
 279     } else if (dir[1] == 'D') {
 280       flagdig = 0;
 281     } else
 282       die_usage();
 283     dir = argv[2];
 284     if (!dir) die_usage();
 285   }
 286
 287   sender = env_get("SENDER");
 288   if (!sender) strerr_die2x(100,FATAL,ERR_NOSENDER);
 289   local = env_get("LOCAL");
 290   if (!local) strerr_die2x(100,FATAL,ERR_NOLOCAL);
 291   def = env_get("DEFAULT");             /* qmail-1.02 */
 292
 293   if (chdir(dir) == -1)
 294     strerr_die4sys(111,FATAL,ERR_SWITCH,dir,": ");
 295
 296   switch(slurp("key",&key,32)) {
 297     case -1:
 298       strerr_die4sys(111,FATAL,ERR_READ,dir,"/key: ");
 299     case 0:
 300       strerr_die4x(100,FATAL,dir,"/key",ERR_NOEXIST);
 301   }
 302   workdir = dir;
 303   action = def;
 304
 305     if (str_start(action,"receipt-")) {
 306       flagreceipt = 1;
 307       action += 8;
 308     }
 309     ch = *action;               /* -d -digest, -m -master, -g -getmaster */
 310     if (ch && action[1] == '-') {
 311       switch (ch) {
 312         case 'g': flagmaster = 1; flagdig = 1; action += 2; break;
 313         case 'm': flagmaster = 1; action += 2; break;
 314         default: break;
 315       }
 316     }
 317   if (flagdig) {
 318     if (!stralloc_copys(&ddir,dir)) die_nomem();
 319     if (!stralloc_cats(&ddir,"/digest")) die_nomem();
 320     if (!stralloc_0(&ddir)) die_nomem();
 321     workdir = ddir.s;
 322   }
 323
 324   if (!*action) die_trash();
 325
 326   if (flagreceipt || flagmaster)                        /* check cookie */
 327     if (str_chr(action,'-') == COOKIE) {
 328       action[COOKIE] = '\0';
 329       hashp = action;
 330       action += COOKIE + 1;
 331   }
 332
 333   if (!flagreceipt) {
 334     if (!flagmaster && str_start(action,"probe-")) {
 335       action += 6;
 336       action += scan_ulong(action,&cookiedate);
 337       if (now() - cookiedate > 3000000) die_trash();
 338       if (*action++ != '.') die_trash();
 339       i = str_chr(action,'-');
 340       if (i != COOKIE) die_trash();
 341       byte_copy(hashcopy,COOKIE,action);
 342       action += COOKIE;
 343       if (*action++ != '-') die_trash();
 344       i = str_rchr(action,'=');
 345       if (!stralloc_copyb(&line,action,i)) die_nomem();
 346       if (action[i]) {
 347         if (!stralloc_cats(&line,"@")) die_nomem();
 348         if (!stralloc_cats(&line,action + i + 1)) die_nomem();
 349       }
 350       if (!stralloc_0(&line)) die_nomem();
 351       strnum[fmt_ulong(strnum,cookiedate)] = 0;
 352       cookie(hash,key.s,key.len,strnum,line.s,"P");
 353       if (byte_diff(hash,COOKIE,hashcopy)) die_trash();
 354
 355       (void) subscribe(workdir,line.s,0,"","-probe",1,-1,(char *) 0,FATAL);
 356       _exit(99);
 357     }
 358
 359     if (!stralloc_copys(&line,workdir)) die_nomem();
 360     if (!stralloc_cats(&line,"/lockbounce")) die_nomem();
 361     if (!stralloc_0(&line)) die_nomem();
 362
 363     fdlock = open_append(line.s);
 364     if (fdlock == -1)
 365       strerr_die4sys(111,FATAL,ERR_OPEN,line.s,": ");
 366     if (lock_ex(fdlock) == -1)
 367       strerr_die4sys(111,FATAL,ERR_OBTAIN,line.s,": ");
 368
 369     if (!flagmaster && str_start(action,"warn-")) {
 370       action += 5;
 371       action += scan_ulong(action,&cookiedate);
 372       if (now() - cookiedate > 3000000) die_trash();
 373       if (*action++ != '.') die_trash();
 374       i = str_chr(action,'-');
 375       if (i != COOKIE) die_trash();
 376       byte_copy(hashcopy,COOKIE,action);
 377       action += COOKIE;
 378       if (*action++ != '-') die_trash();
 379       i = str_rchr(action,'=');
 380       if (!stralloc_copyb(&line,action,i)) die_nomem();
 381       if (action[i]) {
 382         if (!stralloc_cats(&line,"@")) die_nomem();
 383         if (!stralloc_cats(&line,action + i + 1)) die_nomem();
 384       }
 385       if (!stralloc_0(&line)) die_nomem();
 386       strnum[fmt_ulong(strnum,cookiedate)] = 0;
 387       cookie(hash,key.s,key.len,strnum,line.s,"W");
 388       if (byte_diff(hash,COOKIE,hashcopy)) die_trash();
 389
 390       if (slurpclose(0,&bounce,1024) == -1) die_msgin();
 391       dowit(line.s,when,&bounce);
 392       _exit(99);
 393     }
 394   }
 395   action += scan_ulong(action,&msgnum);
 396   if (*action++ != '-') die_badaddr();
 397   cp = action;
 398   if (*action >= '0' && *action <= '9') {               /* listno */
 399     action += scan_ulong(action,&listno);
 400     listno++;                                   /* logging is 1-53, not 0-52 */
 401   }
 402
 403   if (hashp) {          /* scrap bad cookies */
 404       if ((ret = checktag(workdir,msgnum,0L,"x",(char *) 0,hashp))) {
 405         if (*ret)
 406           strerr_die2x(111,FATAL,*ret);
 407         else
 408           die_trash();
 409       } else if (flagreceipt) {
 410         if (!(ret = logmsg(dir,msgnum,listno,0L,5))) {
 411           closesql();
 412           strerr_die6x(99,INFO,"receipt:",cp," [",hashp,"]");
 413         }
 414         if (*ret) strerr_die2x(111,FATAL,ret);
 415         else strerr_die2x(0,INFO,ERR_DONE);
 416       } else if (*action) {     /* post VERP master bounce */
 417         if ((ret = logmsg(dir,msgnum,listno,0L,-1))) {
 418           closesql();
 419           strerr_die4x(0,INFO,"bounce [",hashp,"]");
 420         }
 421         if (*ret) strerr_die2x(111,FATAL,ret);
 422         else strerr_die2x(99,INFO,ERR_DONE);
 423       }
 424    } else if (flagreceipt || flagmaster)
 425         die_badaddr();
 426
 427   if (*action) {
 428     i = str_rchr(action,'=');
 429     if (!stralloc_copyb(&line,action,i)) die_nomem();
 430     if (action[i]) {
 431       if (!stralloc_cats(&line,"@")) die_nomem();
 432       if (!stralloc_cats(&line,action + i + 1)) die_nomem();
 433     }
 434     if (!stralloc_0(&line)) die_nomem();
 435     if (slurpclose(0,&bounce,1024) == -1) die_msgin();
 436     doit(line.s,msgnum,when,&bounce);
 437     _exit(99);
 438   }
 439
 440   /* pre-VERP bounce, in QSBMF format. Receipts are never pre-VERP */
 441
 442   substdio_fdbuf(&ssmsgin,read,0,msginbuf,sizeof(msginbuf));
 443
 444   flaghaveheader = 0;
 445   flaghaveintro = 0;
 446
 447   for (;;) {
 448     if (!stralloc_copys(&paragraph,"")) die_nomem();
 449     for (;;) {
 450       if (getln(&ssmsgin,&line,&match,'\n') == -1) die_msgin();
 451       if (!match) die_trash();
 452       if (!stralloc_cat(&paragraph,&line)) die_nomem();
 453       if (line.len <= 1) break;
 454     }
 455
 456     if (!flaghaveheader) {
 457       if (!stralloc_copy(&header,&paragraph)) die_nomem();
 458       flaghaveheader = 1;
 459       continue;
 460     }
 461
 462     if (!flaghaveintro) {
 463       if (paragraph.s[0] == '-' && paragraph.s[1] == '-')
 464         continue;               /* skip MIME boundary if it exists */
 465       if (paragraph.len < 15) die_trash();
 466       if (str_diffn(paragraph.s,"Hi. This is the",15)) die_trash();
 467       if (!stralloc_copy(&intro,&paragraph)) die_nomem();
 468       flaghaveintro = 1;
 469       continue;
 470     }
 471
 472     if (paragraph.s[0] == '-')
 473       break;
 474
 475     if (paragraph.s[0] == '<') {
 476       if (!stralloc_copy(&failure,&paragraph)) die_nomem();
 477
 478       if (!stralloc_copy(&bounce,&header)) die_nomem();
 479       if (!stralloc_cat(&bounce,&intro)) die_nomem();
 480       if (!stralloc_cat(&bounce,&failure)) die_nomem();
 481
 482       i = byte_chr(failure.s,failure.len,'\n');
 483       if (i < 3) die_trash();
 484
 485       if (!stralloc_copyb(&line,failure.s + 1,i - 3)) die_nomem();
 486       if (byte_chr(line.s,line.len,'\0') == line.len) {
 487         if (!stralloc_0(&line)) die_nomem();
 488         if (flagmaster) {                               /* bounced msg slave! */
 489           if ((i = str_rchr(line.s,'@')) >= 5) {        /* 00_52@host */
 490             line.s[i] = '\0';                           /* 00_52 */
 491             (void) scan_ulong(line.s + i - 5,&listno);
 492               if ((ret = logmsg(dir,msgnum,listno + 1,0L,-1)) && *ret)
 493                 strerr_die2x(111,FATAL,ret);
 494             strerr_warn3(INFO,"bounce ",line.s + i - 5,(struct strerr *) 0);
 495             flagmasterbounce = 1;
 496           }
 497         } else
 498           doit(line.s,msgnum,when,&bounce);
 499       }
 500     }
 501   }
 502   closesql();
 503   if (flagmasterbounce)
 504     strerr_die3x(0,"[",hashp,"]");
 505   else
 506     _exit(99);
 507 }