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

   1 #include <sys/types.h>
   2 #include <sys/stat.h>
   3 #include "direntry.h"
   4 #include "readwrite.h"
   5 #include "getln.h"
   6 #include "substdio.h"
   7 #include "stralloc.h"
   8 #include "slurp.h"
   9 #include "getconf.h"
  10 #include "byte.h"
  11 #include "error.h"
  12 #include "str.h"
  13 #include "strerr.h"
  14 #include "sig.h"
  15 #include "now.h"
  16 #include "datetime.h"
  17 #include "date822fmt.h"
  18 #include "fmt.h"
  19 #include "cookie.h"
  20 #include "qmail.h"
  21
  22 #define FATAL "ezmlm-warn: fatal: "
  23 void die_usage() { strerr_die1x(100,"ezmlm-warn: usage: ezmlm-warn dir"); }
  24 void die_nomem() { strerr_die2x(111,FATAL,"out of memory"); }
  25
  26 stralloc key = {0};
  27 stralloc outhost = {0};
  28 stralloc outlocal = {0};
  29 stralloc mailinglist = {0};
  30
  31 unsigned long when;
  32 char *dir;
  33 stralloc fn = {0};
  34 struct stat st;
  35
  36 void die_read() { strerr_die6sys(111,FATAL,"unable to read ",dir,"/",fn.s,": "); }
  37
  38 char inbuf[1024];
  39 substdio ssin;
  40 char textbuf[1024];
  41 substdio sstext;
  42
  43 stralloc addr = {0};
  44 char strnum[FMT_ULONG];
  45 char hash[COOKIE];
  46 stralloc fnhash = {0};
  47 stralloc quoted = {0};
  48 stralloc line = {0};
  49
  50 struct qmail qq;
  51 int qqwrite(fd,buf,len) int fd; char *buf; unsigned int len;
  52 {
  53   qmail_put(&qq,buf,len);
  54   return len;
  55 }
  56 char qqbuf[1];
  57 substdio ssqq = SUBSTDIO_FDBUF(qqwrite,-1,qqbuf,sizeof(qqbuf));
  58 struct datetime dt;
  59 char date[DATE822FMT];
  60
  61 void copy(fn)
  62 char *fn;
  63 {
  64   int fd;
  65   int match;
  66
  67   fd = open_read(fn);
  68   if (fd == -1)
  69     strerr_die4sys(111,FATAL,"unable to open ",fn,": ");
  70
  71   substdio_fdbuf(&sstext,read,fd,textbuf,sizeof(textbuf));
  72   for (;;) {
  73     if (getln(&sstext,&line,&match,'\n') == -1)
  74       strerr_die4sys(111,FATAL,"unable to read ",fn,": ");
  75     if (!match)
  76       break;
  77     qmail_put(&qq,line.s,line.len);
  78   }
  79
  80   close(fd);
  81 }
  82
  83 void doit(flagw)
  84 int flagw;
  85 {
  86   int i;
  87   int fd;
  88   int match;
  89   int fdhash;
  90   datetime_sec msgwhen;
  91
  92   fd = open_read(fn.s);
  93   if (fd == -1) die_read();
  94   substdio_fdbuf(&ssin,read,fd,inbuf,sizeof(inbuf));
  95
  96   if (getln(&ssin,&addr,&match,'\0') == -1) die_read();
  97   if (!match) { close(fd); return; }
  98
  99   if (!issub(addr.s)) { close(fd); /*XXX*/unlink(fn.s); return; }
 100
 101   cookie(hash,"",0,"",addr.s,"");
 102   if (!stralloc_copys(&fnhash,"bounce/h")) die_nomem();
 103   if (!stralloc_catb(&fnhash,hash,COOKIE)) die_nomem();
 104   if (!stralloc_0(&fnhash)) die_nomem();
 105
 106   if (qmail_open(&qq) == -1)
 107     strerr_die2sys(111,FATAL,"unable to run qmail-queue: ");
 108
 109   msgwhen = now();
 110   qmail_puts(&qq,"Mailing-List: ");
 111   qmail_put(&qq,mailinglist.s,mailinglist.len);
 112   qmail_puts(&qq,"\nDate: ");
 113   datetime_tai(&dt,msgwhen);
 114   qmail_put(&qq,date,date822fmt(date,&dt));
 115   qmail_puts(&qq,"Message-ID: <");
 116   qmail_put(&qq,strnum,fmt_ulong(strnum,(unsigned long) msgwhen));
 117   qmail_puts(&qq,".");
 118   qmail_put(&qq,strnum,fmt_ulong(strnum,(unsigned long) getpid()));
 119   qmail_puts(&qq,".ezmlm-warn@");
 120   qmail_put(&qq,outhost.s,outhost.len);
 121   qmail_puts(&qq,">\nFrom: ");
 122   if (!quote(&quoted,&outlocal)) die_nomem();
 123   qmail_put(&qq,quoted.s,quoted.len);
 124   qmail_puts(&qq,"-help@");
 125   qmail_put(&qq,outhost.s,outhost.len);
 126   qmail_puts(&qq,"\nTo: ");
 127   if (!quote2(&quoted,addr.s)) die_nomem();
 128   qmail_put(&qq,quoted.s,quoted.len);
 129   qmail_puts(&qq,flagw ? "\nSubject: ezmlm probe\n\n" : "\nSubject: ezmlm warning\n\n");
 130
 131   copy("text/top");
 132   copy(flagw ? "text/bounce-probe" : "text/bounce-warn");
 133
 134   if (!flagw) {
 135     fdhash = open_read(fnhash.s);
 136     if (fdhash == -1) {
 137       if (errno != error_noent)
 138         strerr_die6sys(111,FATAL,"unable to open ",dir,"/",fnhash.s,": ");
 139     }
 140     else {
 141       copy("text/bounce-num");
 142       substdio_fdbuf(&sstext,read,fdhash,textbuf,sizeof(textbuf));
 143       if (substdio_copy(&ssqq,&sstext) < 0)
 144         strerr_die6sys(111,FATAL,"unable to read ",dir,"/",fnhash.s,": ");
 145       close(fdhash);
 146     }
 147   }
 148
 149   copy("text/bounce-bottom");
 150   if (substdio_copy(&ssqq,&ssin) < 0) die_read();
 151   close(fd);
 152
 153   strnum[fmt_ulong(strnum,when)] = 0;
 154   cookie(hash,key.s,key.len,strnum,addr.s,flagw ? "P" : "W");
 155   if (!stralloc_copy(&line,&outlocal)) die_nomem();
 156   if (!stralloc_cats(&line,flagw ? "-return-probe-" : "-return-warn-")) die_nomem();
 157   if (!stralloc_cats(&line,strnum)) die_nomem();
 158   if (!stralloc_cats(&line,".")) die_nomem();
 159   if (!stralloc_catb(&line,hash,COOKIE)) die_nomem();
 160   if (!stralloc_cats(&line,"-")) die_nomem();
 161   i = str_chr(addr.s,'@');
 162   if (!stralloc_catb(&line,addr.s,i)) die_nomem();
 163   if (addr.s[i]) {
 164     if (!stralloc_cats(&line,"=")) die_nomem();
 165     if (!stralloc_cats(&line,addr.s + i + 1)) die_nomem();
 166   }
 167   if (!stralloc_cats(&line,"@")) die_nomem();
 168   if (!stralloc_cat(&line,&outhost)) die_nomem();
 169   if (!stralloc_0(&line)) die_nomem();
 170   qmail_from(&qq,line.s);
 171
 172   qmail_to(&qq,addr.s);
 173   if (qmail_close(&qq) != 0)
 174     strerr_die2x(111,FATAL,"temporary qmail-queue error");
 175
 176   strnum[fmt_ulong(strnum,qmail_qp(&qq))] = 0;
 177   strerr_warn2("ezmlm-warn: info: qp ",strnum,0);
 178
 179   if (!flagw) {
 180     if (unlink(fnhash.s) == -1)
 181       if (errno != error_noent)
 182         strerr_die6sys(111,FATAL,"unable to remove ",dir,"/",fnhash.s,": ");
 183   }
 184   if (unlink(fn.s) == -1)
 185     strerr_die6sys(111,FATAL,"unable to remove ",dir,"/",fn.s,": ");
 186 }
 187
 188 void main(argc,argv)
 189 int argc;
 190 char **argv;
 191 {
 192   DIR *bouncedir;
 193   direntry *d;
 194   unsigned long bouncedate;
 195   int fdlock;
 196
 197   umask(022);
 198   sig_pipeignore();
 199   when = (unsigned long) now();
 200
 201   dir = argv[1];
 202   if (!dir) die_usage();
 203
 204   if (chdir(dir) == -1)
 205     strerr_die4sys(111,FATAL,"unable to switch to ",dir,": ");
 206
 207   switch(slurp("key",&key,32)) {
 208     case -1:
 209       strerr_die4sys(111,FATAL,"unable to read ",dir,"/key: ");
 210     case 0:
 211       strerr_die3x(100,FATAL,dir,"/key does not exist");
 212   }
 213   getconf_line(&outhost,"outhost",1,FATAL,dir);
 214   getconf_line(&outlocal,"outlocal",1,FATAL,dir);
 215   getconf_line(&mailinglist,"mailinglist",1,FATAL,dir);
 216
 217   fdlock = open_append("lockbounce");
 218   if (fdlock == -1)
 219     strerr_die4sys(111,FATAL,"unable to open ",dir,"/lockbounce: ");
 220   if (lock_ex(fdlock) == -1)
 221     strerr_die4sys(111,FATAL,"unable to lock ",dir,"/lockbounce: ");
 222
 223   bouncedir = opendir("bounce");
 224   if (!bouncedir)
 225     strerr_die4sys(111,FATAL,"unable to open ",dir,"/bounce: ");
 226
 227   while (d = readdir(bouncedir)) {
 228     if (str_equal(d->d_name,".")) continue;
 229     if (str_equal(d->d_name,"..")) continue;
 230
 231     if (!stralloc_copys(&fn,"bounce/")) die_nomem();
 232     if (!stralloc_cats(&fn,d->d_name)) die_nomem();
 233     if (!stralloc_0(&fn)) die_nomem();
 234
 235     if (stat(fn.s,&st) == -1) {
 236       if (errno == error_noent) continue;
 237       strerr_die6sys(111,FATAL,"unable to stat ",dir,"/",fn.s,": ");
 238     }
 239
 240     if (when > st.st_mtime + 3000000)
 241       if (unlink(fn.s) == -1)
 242         strerr_die6sys(111,FATAL,"unable to remove ",dir,"/",fn.s,": ");
 243
 244     if ((d->d_name[0] == 'd') || (d->d_name[0] == 'w')) {
 245       scan_ulong(d->d_name + 1,&bouncedate);
 246       if (when > bouncedate + 1000000)
 247         doit(d->d_name[0] == 'w');
 248     }
 249   }
 250
 251   closedir(bouncedir);
 252
 253   _exit(0);
 254 }