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

   1 /*$Id: ezmlm-gate.c,v 1.18 1999/10/09 16:49:56 lindberg Exp $*/
   2 /*$Name: ezmlm-idx-040 $*/
   3
   4 #include "stralloc.h"
   5 #include "strerr.h"
   6 #include "error.h"
   7 #include "env.h"
   8 #include "sig.h"
   9 #include "str.h"
  10 #include "seek.h"
  11 #include "fork.h"
  12 #include "wait.h"
  13 #include "exit.h"
  14 #include "getconf.h"
  15 #include "auto_bin.h"
  16 #include "sgetopt.h"
  17 #include "errtxt.h"
  18 #include "idx.h"
  19 #include "subscribe.h"
  20
  21 #define FATAL "ezmlm-gate: fatal: "
  22
  23 void die_usage()
  24 {
  25   strerr_die1x(100,"ezmlm-gate: usage: ezmlm-gate [-cCmMpPqrRsSvV] "
  26                         "dir [moddir [...]]");
  27 }
  28 void die_nomem() { strerr_die2x(111,FATAL,ERR_NOMEM); }
  29
  30 stralloc line = {0};
  31 stralloc cmds = {0};
  32 stralloc send = {0};
  33 stralloc sendopt = {0};
  34 stralloc storeopt = {0};
  35 void *psql = (void *) 0;
  36
  37 char szchar[2] = "-";
  38   char *sendargs[4];
  39   int child;
  40   int wstat;
  41   char *pmod;
  42
  43 int mailprog(s)
  44   char *s;
  45 {
  46     int r;
  47
  48     sendargs[0] = "/bin/sh";    /* 100 perm error, 111 temp, 99 dom ok */
  49     sendargs[1] = "-c";         /* 0 rec ok, others bounce */
  50     sendargs[2] = s;
  51     sendargs[3] = (char *)0;
  52     switch(child = fork()) {
  53       case -1:
  54         strerr_die2sys(111,FATAL,ERR_FORK);
  55       case 0:
  56         execv(*sendargs,sendargs);
  57         if (errno == error_txtbsy || errno == error_nomem ||
  58           errno == error_io)
  59                 strerr_die5sys(111,FATAL,ERR_EXECUTE,
  60                   "/bin/sh -c ",sendargs[2],": ");
  61         else
  62                 strerr_die5sys(100,FATAL,ERR_EXECUTE,
  63                   "/bin/sh -c ",sendargs[2],": ");
  64     }
  65          /* parent */
  66     wait_pid(&wstat,child);
  67     if (wait_crashed(wstat))
  68         strerr_die2x(111,FATAL,ERR_CHILD_CRASHED);
  69     switch((r = wait_exitcode(wstat))) {
  70       case 0: case 99: case 100: break;
  71       case 111:                                 /* temp error */
  72         strerr_die2x(111,FATAL,ERR_CHILD_TEMP);
  73       default:
  74         strerr_die2x(100,FATAL,ERR_REJECT);     /* other errors => bounce */
  75     }
  76     if (seek_begin(0) == -1)                    /* rewind */
  77       strerr_die2sys(111,FATAL,ERR_SEEK_INPUT);
  78     return r;
  79 }
  80
  81 void main(argc,argv)
  82 int argc;
  83 char **argv;
  84 {
  85   char *dir;
  86   char *sender;
  87   char *moddir;
  88   char *queryext = (char *) 0;
  89   int opt;
  90   int ret = 0;
  91   unsigned int i,j,k;
  92
  93   umask(022);
  94   sig_pipeignore();
  95         /* storeopts to ezmlm-store only. Others to both (ezmlm-store may */
  96         /* pass them on to ezmlm-send. */
  97   if (!stralloc_copys(&sendopt," -")) die_nomem();
  98   if (!stralloc_copys(&storeopt," -")) die_nomem();
  99
 100   while ((opt = getopt(argc,argv,
 101       "cCmMpPq:Q:sSrRt:T:vV")) != opteof)
 102     switch(opt) {       /* pass on unrecognized options */
 103       case 'c':                 /* ezmlm-send flags */
 104       case 'C':
 105       case 'r':
 106       case 'R':
 107         szchar[0] = opt;
 108         if (!stralloc_append(&sendopt,szchar)) die_nomem();
 109         break;
 110       case 'm':                 /* ezmlm-store flags */
 111       case 'M':
 112       case 'p':
 113       case 'P':
 114       case 's':
 115       case 'S':
 116         szchar[0] = opt;
 117         if (!stralloc_append(&storeopt,szchar)) die_nomem();
 118         break;
 119       case 'q':                 /* allow both qQ to be nice */
 120       case 'Q': if (optarg) queryext = optarg; break;
 121       case 'v':
 122       case 'V': strerr_die2x(0,"ezmlm-gate version: ",EZIDX_VERSION);
 123       default:                  /* ezmlm-store flags */
 124         die_usage();
 125     }
 126
 127   dir = argv[optind++];
 128   if (!dir) die_usage();
 129   if (chdir(dir) == -1)
 130     strerr_die4sys(111,FATAL,ERR_SWITCH,dir,": ");
 131
 132   sender = env_get("SENDER");
 133
 134   pmod = (char *) 0;
 135
 136   if (queryext) {
 137     getconf(&cmds,queryext,1,FATAL,dir);
 138     i = 0;
 139     for (j = 0;j < cmds.len; ++j)
 140       if (!cmds.s[j]) {
 141         switch (cmds.s[i]) {
 142           case '\0': case '#': break;   /* ignore blank/comment */
 143           case '|':
 144                 ret = mailprog(cmds.s + i + 1); break;
 145           default:
 146                 ret = mailprog(cmds.s + i); break;
 147         }
 148         if (ret) break;
 149         i = j + 1;
 150     }
 151     if (!ret || ret == 99)              /* 111 => temp error */
 152       pmod = "";                        /* 0, 99 => post */
 153                                         /* other => moderate */
 154   }
 155   moddir = argv[optind++];
 156   if (moddir && !ret) {                 /* if exit 0 and moddir, add issub */
 157     pmod = (char *) 0;
 158     while (moddir && !pmod && sender) {
 159       pmod = issub(moddir,sender,(char *) 0,FATAL);
 160       closesql();
 161       moddir = argv[optind++];
 162     }
 163   }
 164
 165   sendargs[0] = "sh";
 166   sendargs[1] = "-c";
 167   if (!stralloc_copys(&send,auto_bin)) die_nomem();
 168   if (pmod) {
 169     if (!stralloc_cats(&send,"/ezmlm-send")) die_nomem();
 170     if (sendopt.len > 2)
 171       if (!stralloc_cat(&send,&sendopt)) die_nomem();
 172
 173   } else {
 174     if (!stralloc_cats(&send,"/ezmlm-store")) die_nomem();
 175     if (storeopt.len > 2)
 176       if (!stralloc_cat(&send,&storeopt)) die_nomem();
 177     if (sendopt.len > 2)
 178       if (!stralloc_cat(&send,&sendopt)) die_nomem();
 179   }
 180   if (!stralloc_cats(&send," '")) die_nomem();
 181   if (!stralloc_cats(&send,dir)) die_nomem();
 182   if (!stralloc_cats(&send,"'")) die_nomem();
 183   if (!stralloc_0(&send)) die_nomem();
 184   sendargs[2] = send.s;
 185   sendargs[3] = 0;
 186
 187   switch(child = fork()) {
 188     case -1:
 189       strerr_die2sys(111,FATAL,ERR_FORK);
 190     case 0:
 191       execvp(*sendargs,sendargs);
 192       if (errno == error_txtbsy || errno == error_nomem ||
 193           errno == error_io)
 194         strerr_die4sys(111,FATAL,ERR_EXECUTE,sendargs[2],": ");
 195       else
 196         strerr_die4sys(100,FATAL,ERR_EXECUTE,sendargs[2],": ");
 197    }
 198          /* parent */
 199    wait_pid(&wstat,child);
 200    if (wait_crashed(wstat))
 201      strerr_die2x(111,FATAL,ERR_CHILD_CRASHED);
 202    switch(wait_exitcode(wstat)) {
 203      case 100:
 204        strerr_die2x(100,FATAL,ERR_CHILD_FATAL);
 205      case 111:
 206         strerr_die2x(111,FATAL,ERR_CHILD_TEMP);
 207      case 0:
 208        _exit(0);
 209      default:
 210        strerr_die2x(111,FATAL,ERR_CHILD_UNKNOWN);
 211    }
 212 }
 213