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

   1 /*$Id: ezmlm-store.c,v 1.52 1999/10/09 16:49:56 lindberg Exp $*/
   2 /*$Name: ezmlm-idx-040 $*/
   3
   4 #include <sys/types.h>
   5 #include <sys/stat.h>
   6 #include "stralloc.h"
   7 #include "subfd.h"
   8 #include "strerr.h"
   9 #include "error.h"
  10 #include "qmail.h"
  11 #include "env.h"
  12 #include "lock.h"
  13 #include "sig.h"
  14 #include "open.h"
  15 #include "getln.h"
  16 #include "str.h"
  17 #include "fmt.h"
  18 #include "readwrite.h"
  19 #include "auto_bin.h"
  20 #include "fork.h"
  21 #include "wait.h"
  22 #include "exit.h"
  23 #include "substdio.h"
  24 #include "getconf.h"
  25 #include "datetime.h"
  26 #include "now.h"
  27 #include "date822fmt.h"
  28 #include "cookie.h"
  29 #include "sgetopt.h"
  30 #include "errtxt.h"
  31 #include "idx.h"
  32 #include "copy.h"
  33 #include "subscribe.h"
  34 #include "mime.h"
  35
  36 int flagmime = MOD_MIME;        /* default is message as attachment */
  37 int flagpublic = 1;             /* default anyone can post */
  38                                 /* =0 for only moderators can */
  39 int flagself = 0;               /* `modpost` mods approve own posts */
  40                                 /* but mod/ is used for moderators */
  41                                 /* of other posts. Def=no=0 */
  42 char flagcd = '\0';             /* default: don't use quoted-printable */
  43 int flagbody = 1;               /* body of message enclosed with mod request */
  44                                 /* 0 => headers only */
  45
  46 #define FATAL "ezmlm-store: fatal: "
  47
  48 void die_usage()
  49 {
  50   strerr_die1x(100,"ezmlm-store: usage: ezmlm-store [-cCmMpPrRsSvV] dir");
  51 }
  52 void die_nomem() { strerr_die2x(111,FATAL,ERR_NOMEM); }
  53
  54 stralloc fnmsg = {0};
  55
  56 void die_msg() { strerr_die4sys(111,FATAL,ERR_WRITE,fnmsg.s,": "); }
  57
  58 int fdmsg;
  59 int fdmod;
  60 int pid;
  61 int match;
  62
  63 char strnum[FMT_ULONG];
  64 char date[DATE822FMT];
  65 char hash[COOKIE];
  66 char boundary[COOKIE];
  67 datetime_sec when;
  68 struct datetime dt;
  69 struct stat st;
  70
  71 void *psql = (void *) 0;
  72
  73 stralloc fnbase = {0};
  74 stralloc line = {0};
  75 stralloc mailinglist = {0};
  76 stralloc outlocal = {0};
  77 stralloc outhost = {0};
  78 stralloc mydtline = {0};
  79 stralloc returnpath = {0};
  80 stralloc accept = {0};
  81 stralloc action = {0};
  82 stralloc reject = {0};
  83 stralloc quoted = {0};
  84 stralloc key = {0};
  85 stralloc subject = {0};
  86 stralloc moderators = {0};
  87 stralloc charset = {0};
  88 stralloc sendopt = {0};
  89
  90 struct qmail qq;
  91 int qqwrite(fd,buf,len) int fd; char *buf; unsigned int len;
  92 {
  93   qmail_put(&qq,buf,len);
  94   return len;
  95 }
  96
  97 int subto(s,l)
  98 char *s;
  99 unsigned int l;
 100 {
 101   qmail_put(&qq,"T",1);
 102   qmail_put(&qq,s,l);
 103   qmail_put(&qq,"",1);
 104   return (int) l;
 105 }
 106
 107 char qqbuf[1];
 108 substdio ssqq = SUBSTDIO_FDBUF(qqwrite,-1,qqbuf,sizeof(qqbuf));
 109
 110 substdio ssin;
 111 char inbuf[1024];
 112
 113 substdio ssmsg;
 114 char msgbuf[1024];
 115
 116 substdio sstext;
 117 char textbuf[512];
 118
 119 substdio sssub;
 120 char subbuf[512];
 121
 122 void transferenc()
 123 {
 124         if (flagcd) {
 125           qmail_puts(&qq,"\nContent-Transfer-Encoding: ");
 126           if (flagcd == 'Q')
 127             qmail_puts(&qq,"Quoted-Printable\n\n");
 128           else
 129             qmail_puts(&qq,"base64\n\n");
 130         } else
 131           qmail_puts(&qq,"\n\n");
 132 }
 133
 134 void makehash(act)
 135 stralloc *act;                                  /* has to be 0-terminated  */
 136 /* act is expected to be -reject-ddddd.ttttt or -accept-ddddd.ttttt        */
 137 /* The routine will add .hash@outhost to act. act will NOT be 0-terminated */
 138 {
 139   int d;
 140
 141   d = 2 + str_chr(act->s + 1,'-');
 142   cookie(hash,key.s,key.len,act->s + d,"","a");
 143   *(act->s + act->len - 1) = '.';       /* we put a '.' Bad, but works */
 144   if (!stralloc_catb(act,hash,COOKIE)) die_nomem();
 145   if (!stralloc_cats(act,"@")) die_nomem();
 146   if (!stralloc_cat(act,&outhost)) die_nomem();
 147 }
 148
 149 void main(argc,argv)
 150 int argc;
 151 char **argv;
 152 {
 153   char *dir;
 154   int fdlock;
 155   char *sender;
 156   int match;
 157   int flaginheader;
 158   int flagmodpost;
 159   int flagremote;
 160   char *pmod;
 161   char *err;
 162   int opt;
 163   unsigned int i;
 164   char szchar[2] = "-";
 165   char *sendargs[4];
 166   int child,wstat;
 167
 168   (void) umask(022);
 169   sig_pipeignore();
 170
 171   if (!stralloc_copys(&sendopt," -")) die_nomem();
 172   while ((opt = getopt(argc,argv,"bBcCmMpPrRsSvV")) != opteof)
 173     switch(opt) {
 174       case 'b': flagbody = 1; break;
 175       case 'B': flagbody = 0; break;
 176       case 'm': flagmime = 1; break;
 177       case 'M': flagmime = 0; break;
 178       case 'p': flagpublic = 1; break;  /* anyone can post (still moderated)*/
 179       case 'P': flagpublic = 0; break;  /* only moderators can post */
 180       case 's': flagself = 1; break;    /* modpost and DIR/mod diff fxns */
 181       case 'S': flagself = 0; break;    /* same fxn */
 182       case 'c':                         /* ezmlm-send flags */
 183       case 'C':
 184       case 'r':
 185       case 'R':
 186         szchar[0] = (char) opt & 0xff;
 187         if (!stralloc_append(&sendopt,szchar)) die_nomem();
 188         break;
 189       case 'v':
 190       case 'V': strerr_die2x(0,"ezmlm-store version: ",EZIDX_VERSION);
 191       default:
 192         die_usage();
 193     }
 194
 195   sender = env_get("SENDER");
 196
 197   if (sender) {
 198     if (!*sender || str_equal(sender,"#@[]"))
 199       strerr_die2x(100,FATAL,ERR_BOUNCE);
 200   }
 201
 202   dir = argv[optind];
 203   if (!dir) die_usage();
 204
 205   if (chdir(dir) == -1)
 206     strerr_die4sys(111,FATAL,ERR_SWITCH,dir,": ");
 207
 208   flagmodpost = getconf_line(&moderators,"modpost",0,FATAL,dir);
 209   flagremote = getconf_line(&line,"remote",0,FATAL,dir);
 210   if (!flagmodpost) {                   /* not msg-mod. Pipe to ezmlm-send */
 211     sendargs[0] = "/bin/sh";
 212     sendargs[1] = "-c";
 213     if (!stralloc_copys(&line,auto_bin)) die_nomem();
 214     if (!stralloc_cats(&line,"/ezmlm-send")) die_nomem();
 215     if (sendopt.len > 2)
 216       if (!stralloc_cat(&line,&sendopt)) die_nomem();
 217     if (!stralloc_cats(&line," '")) die_nomem();
 218     if (!stralloc_cats(&line,dir)) die_nomem();
 219     if (!stralloc_cats(&line,"'")) die_nomem();
 220     if (!stralloc_0(&line)) die_nomem();
 221     sendargs[2] = line.s;
 222     sendargs[3] = 0;
 223     switch(child = fork()) {
 224       case -1:
 225         strerr_die2sys(111,FATAL,ERR_FORK);
 226       case 0:
 227         execvp(*sendargs,sendargs);
 228         if (errno == error_txtbsy || errno == error_nomem ||
 229             errno == error_io)
 230           strerr_die5sys(111,FATAL,ERR_EXECUTE,"/bin/sh -c ",sendargs[2],": ");
 231         else
 232           strerr_die5sys(100,FATAL,ERR_EXECUTE,"/bin/sh -c ",sendargs[2],": ");
 233     }
 234          /* parent */
 235     wait_pid(&wstat,child);
 236     if (wait_crashed(wstat))
 237       strerr_die2x(111,FATAL,ERR_CHILD_CRASHED);
 238     switch(wait_exitcode(wstat)) {
 239       case 100:
 240         strerr_die2x(100,FATAL,"Fatal error from child");
 241       case 111:
 242          strerr_die2x(111,FATAL,"Temporary error from child");
 243       case 0:
 244         _exit(0);
 245       default:
 246         strerr_die2x(111,FATAL,"Unknown temporary error from child");
 247     }
 248   }
 249
 250   if (!moderators.len || !(moderators.s[0] == '/')) {
 251     if (!stralloc_copys(&moderators,dir)) die_nomem();
 252     if (!stralloc_cats(&moderators,"/mod")) die_nomem();
 253   }
 254   if (!stralloc_0(&moderators)) die_nomem();
 255
 256   if (sender) {
 257       pmod = issub(moderators.s,sender,(char *) 0,FATAL);
 258       closesql();
 259                                 /* sender = moderator? */
 260   } else
 261     pmod = 0;
 262
 263   if (!pmod && !flagpublic)
 264     strerr_die2x(100,FATAL,ERR_NO_POST);
 265
 266   switch(slurp("key",&key,32)) {
 267     case -1:
 268       strerr_die4sys(111,FATAL,ERR_READ,dir,"/key: ");
 269     case 0:
 270       strerr_die4x(100,FATAL,dir,"/key",ERR_NOEXIST);
 271   }
 272
 273   getconf_line(&outhost,"outhost",1,FATAL,dir);
 274   getconf_line(&outlocal,"outlocal",1,FATAL,dir);
 275   getconf_line(&mailinglist,"mailinglist",1,FATAL,dir);
 276
 277   fdlock = open_append("mod/lock");
 278   if (fdlock == -1)
 279     strerr_die4sys(111,FATAL,ERR_OPEN,dir,"/mod/lock: ");
 280   if (lock_ex(fdlock) == -1)
 281     strerr_die4sys(111,FATAL,ERR_OBTAIN,dir,"/mod/lock: ");
 282
 283   if (!stralloc_copys(&mydtline,"Delivered-To: moderator for ")) die_nomem();
 284   if (!stralloc_catb(&mydtline,outlocal.s,outlocal.len)) die_nomem();
 285   if (!stralloc_append(&mydtline,"@")) die_nomem();
 286   if (!stralloc_catb(&mydtline,outhost.s,outhost.len)) die_nomem();
 287   if (!stralloc_cats(&mydtline,"\n")) die_nomem();
 288
 289   if (!stralloc_copys(&returnpath,"Return-Path: <")) die_nomem();
 290   if (sender) {
 291     if (!stralloc_cats(&returnpath,sender)) die_nomem();
 292     for (i = 14; i < returnpath.len;++i)
 293       if (returnpath.s[i] == '\n' || !returnpath.s[i] )
 294         returnpath.s[i] = '_';
 295                 /* NUL and '\n' are bad, but we don't quote since this is */
 296                 /* only for ezmlm-moderate, NOT for SMTP */
 297   }
 298   if (!stralloc_cats(&returnpath,">\n")) die_nomem();
 299
 300  pid = getpid();                /* unique file name */
 301  for (i = 0;;++i)               /* got lock - nobody else can add files */
 302   {
 303    when = now();                /* when is also used later for date! */
 304    if (!stralloc_copys(&fnmsg,"mod/pending/")) die_nomem();
 305    if (!stralloc_copyb(&fnbase,strnum,fmt_ulong(strnum,when))) die_nomem();
 306    if (!stralloc_append(&fnbase,".")) die_nomem();
 307    if (!stralloc_catb(&fnbase,strnum,fmt_ulong(strnum,pid))) die_nomem();
 308    if (!stralloc_cat(&fnmsg,&fnbase)) die_nomem();
 309    if (!stralloc_0(&fnmsg)) die_nomem();
 310    if (stat(fnmsg.s,&st) == -1) if (errno == error_noent) break;
 311    /* really should never get to this point */
 312    if (i == 2)
 313      strerr_die2x(111,FATAL,ERR_UNIQUE);
 314    sleep(2);
 315   }
 316
 317   if (!stralloc_copys(&action,"-")) die_nomem();
 318   if (!stralloc_cats(&action,ACTION_REJECT)) die_nomem();
 319   if (!stralloc_cat(&action,&fnbase)) die_nomem();
 320   if (!stralloc_0(&action)) die_nomem();
 321   makehash(&action);
 322   if (!quote(&quoted,&outlocal)) die_nomem();
 323   if (!stralloc_copy(&reject,&quoted)) die_nomem();
 324   if (!stralloc_cat(&reject,&action)) die_nomem();
 325   if (!stralloc_0(&reject)) die_nomem();
 326
 327   if (!stralloc_copys(&action,"-")) die_nomem();
 328   if (!stralloc_cats(&action,ACTION_ACCEPT)) die_nomem();
 329   if (!stralloc_cat(&action,&fnbase)) die_nomem();
 330   if (!stralloc_0(&action)) die_nomem();
 331   makehash(&action);
 332   if (!stralloc_copy(&accept,&quoted)) die_nomem();
 333   if (!stralloc_cat(&accept,&action)) die_nomem();
 334   if (!stralloc_0(&accept)) die_nomem();
 335
 336   set_cpoutlocal(&outlocal);
 337   set_cpouthost(&outhost);
 338   set_cptarget(accept.s);       /* for copy () */
 339   set_cpconfirm(reject.s);
 340
 341   fdmsg = open_trunc(fnmsg.s);
 342   if (fdmsg == -1)
 343     strerr_die6sys(111,FATAL,ERR_WRITE,dir,"/",fnmsg.s,": ");
 344   substdio_fdbuf(&ssmsg,write,fdmsg,msgbuf,sizeof(msgbuf));
 345
 346   if (qmail_open(&qq, (stralloc *) 0) == -1)            /* Open mailer */
 347     strerr_die2sys(111,FATAL,ERR_QMAIL_QUEUE);
 348
 349   qmail_puts(&qq,"Mailing-List: ");
 350   qmail_put(&qq,mailinglist.s,mailinglist.len);
 351   if (getconf_line(&line,"listid",0,FATAL,dir)) {
 352     qmail_puts(&qq,"List-ID: ");
 353     qmail_put(&qq,line.s,line.len);
 354   }
 355   qmail_puts(&qq,"\nDate: ");
 356   datetime_tai(&dt,when);
 357   qmail_put(&qq,date,date822fmt(date,&dt));
 358   qmail_puts(&qq,"Message-ID: <");
 359   if (!stralloc_copyb(&line,strnum,fmt_ulong(strnum,(unsigned long) when)))
 360      die_nomem();
 361   if (!stralloc_append(&line,".")) die_nomem();
 362   if (!stralloc_catb(&line,strnum,
 363                 fmt_ulong(strnum,(unsigned long) getpid()))) die_nomem();
 364   if (!stralloc_cats(&line,".ezmlm@")) die_nomem();
 365   if (!stralloc_cat(&line,&outhost)) die_nomem();
 366   if (!stralloc_0(&line)) die_nomem();
 367   qmail_puts(&qq,line.s);
 368                 /* "unique" MIME boundary as hash of messageid */
 369   cookie(boundary,"",0,"",line.s,"");
 370   qmail_puts(&qq,">\nFrom: ");
 371   qmail_puts(&qq,reject.s);
 372   qmail_puts(&qq,"\nReply-To: ");
 373   qmail_puts(&qq,accept.s);
 374   if (!pmod && flagremote) {    /* if remote admin add -allow- address */
 375     qmail_puts(&qq,"\nCc: ");   /* for ezmlm-gate users */
 376     strnum[fmt_ulong(strnum,(unsigned long) when)] = 0;
 377     cookie(hash,key.s,key.len-FLD_ALLOW,strnum,sender,"t");
 378     if (!stralloc_copy(&line,&outlocal)) die_nomem();
 379     if (!stralloc_cats(&line,"-allow-tc.")) die_nomem();
 380     if (!stralloc_cats(&line,strnum)) die_nomem();
 381     if (!stralloc_append(&line,".")) die_nomem();
 382     if (!stralloc_catb(&line,hash,COOKIE)) die_nomem();
 383     if (!stralloc_append(&line,"-")) die_nomem();
 384     i = str_rchr(sender,'@');
 385     if (!stralloc_catb(&line,sender,i)) die_nomem();
 386     if (sender[i]) {
 387       if (!stralloc_append(&line,"=")) die_nomem();
 388       if (!stralloc_cats(&line,sender + i + 1)) die_nomem();
 389     }
 390     qmail_put(&qq,line.s,line.len);
 391     qmail_puts(&qq,"@");
 392     qmail_put(&qq,outhost.s,outhost.len);
 393   }
 394   qmail_puts(&qq,"\nTo: Recipient list not shown: ;");
 395   if (!stralloc_copys(&subject,"\nSubject: ")) die_nomem();
 396   if (!stralloc_cats(&subject,TXT_MODERATE)) die_nomem();
 397   if (!quote(&quoted,&outlocal)) die_nomem();
 398   if (!stralloc_cat(&subject,&quoted)) die_nomem();
 399   if (!stralloc_append(&subject,"@")) die_nomem();
 400   if (!stralloc_cat(&subject,&outhost)) die_nomem();
 401   if (flagmime) {
 402     if (getconf_line(&charset,"charset",0,FATAL,dir)) {
 403       if (charset.len >= 2 && charset.s[charset.len - 2] == ':') {
 404         if (charset.s[charset.len - 1] == 'B' ||
 405                 charset.s[charset.len - 1] == 'Q') {
 406           flagcd = charset.s[charset.len - 1];
 407           charset.s[charset.len - 2] = '\0';
 408         }
 409       }
 410     } else
 411       if (!stralloc_copys(&charset,TXT_DEF_CHARSET)) die_nomem();
 412     if (!stralloc_0(&charset)) die_nomem();
 413     qmail_puts(&qq,"\nMIME-Version: 1.0\n");
 414     qmail_puts(&qq,"Content-Type: multipart/mixed;\n\tboundary=");
 415     qmail_put(&qq,boundary,COOKIE);
 416     qmail_put(&qq,subject.s,subject.len);
 417     qmail_puts(&qq,"\n\n--");
 418     qmail_put(&qq,boundary,COOKIE);
 419     qmail_puts(&qq,"\nContent-Type: text/plain; charset=");
 420     qmail_puts(&qq,charset.s);
 421     transferenc();
 422   } else {
 423     qmail_put(&qq,subject.s,subject.len);
 424     qmail_puts(&qq,"\n\n");
 425   }
 426   copy(&qq,"text/mod-request",flagcd,FATAL);
 427   if (flagcd == 'B') {
 428     encodeB("",0,&line,2,FATAL);
 429     qmail_put(&qq,line.s,line.len);
 430   }
 431   if (substdio_put(&ssmsg,returnpath.s,returnpath.len) == -1) die_msg();
 432   if (substdio_put(&ssmsg,mydtline.s,mydtline.len) == -1) die_msg();
 433   substdio_fdbuf(&ssin,read,0,inbuf,sizeof(inbuf));
 434
 435   if (flagmime) {
 436     qmail_puts(&qq,"\n--");
 437     qmail_put(&qq,boundary,COOKIE);
 438     qmail_puts(&qq,"\nContent-Type: message/rfc822\n\n");
 439   }
 440
 441   qmail_put(&qq,returnpath.s,returnpath.len);
 442   qmail_put(&qq,mydtline.s,mydtline.len);
 443   flaginheader = 1;
 444   for (;;) {
 445     if (getln(&ssin,&line,&match,'\n') == -1)
 446       strerr_die2sys(111,FATAL,ERR_READ_INPUT);
 447     if (!match) break;
 448     if (line.len == 1) flaginheader = 0;
 449     if (flaginheader) {
 450       if ((line.len == mydtline.len) &&
 451                 !byte_diff(line.s,line.len,mydtline.s)) {
 452         close(fdmsg);                   /* be nice - clean up */
 453         unlink(fnmsg.s);
 454         strerr_die2x(100,FATAL,ERR_LOOPING);
 455       }
 456       if (case_startb(line.s,line.len,"mailing-list:")) {
 457         close(fdmsg);                   /* be nice - clean up */
 458         unlink(fnmsg.s);
 459         strerr_die2x(100,FATAL,ERR_MAILING_LIST);
 460       }
 461     }
 462
 463     if (flagbody || flaginheader)       /* skip body if !flagbody */
 464       qmail_put(&qq,line.s,line.len);
 465     if (substdio_put(&ssmsg,line.s,line.len) == -1) die_msg();
 466   }
 467
 468   if (flagmime) {
 469     qmail_puts(&qq,"\n--");
 470     qmail_put(&qq,boundary,COOKIE);
 471     qmail_puts(&qq,"--\n");
 472   }
 473
 474 /* close archive before qmail. Loss of qmail will result in re-run, and   */
 475 /* worst case this results in a duplicate msg sitting orphaned until it's */
 476 /* cleaned out.                                                           */
 477
 478   if (substdio_flush(&ssmsg) == -1) die_msg();
 479   if (fsync(fdmsg) == -1) die_msg();
 480   if (fchmod(fdmsg,MODE_MOD_MSG | 0700) == -1) die_msg();
 481   if (close(fdmsg) == -1) die_msg(); /* NFS stupidity */
 482
 483   close(fdlock);
 484
 485   if (!stralloc_copy(&line,&outlocal)) die_nomem();
 486   if (!stralloc_cats(&line,"-return-@")) die_nomem();
 487   if (!stralloc_cat(&line,&outhost)) die_nomem();
 488   if (!stralloc_0(&line)) die_nomem();
 489   qmail_from(&qq,line.s);                       /* envelope sender */
 490   if (pmod)                                     /* to moderator only */
 491     qmail_to(&qq,pmod);
 492   else {
 493     if (flagself) {                             /* to all moderators */
 494       if (!stralloc_copys(&moderators,dir)) die_nomem();
 495       if (!stralloc_cats(&moderators,"/mod")) die_nomem();
 496       if (!stralloc_0(&moderators)) die_nomem();
 497     }
 498     putsubs(moderators.s,0,52,subto,1,FATAL);
 499   }
 500
 501   if (*(err = qmail_close(&qq)) == '\0') {
 502       strnum[fmt_ulong(strnum,qmail_qp(&qq))] = 0;
 503       strerr_die2x(0,"ezmlm-store: info: qp ",strnum);
 504   } else
 505       strerr_die3x(111,FATAL,ERR_TMP_QMAIL_QUEUE,err+1);
 506 }