diplodocus.org Git - nmh/blob - uip/rcvdist.c

   1 /* rcvdist.c -- asynchronously redistribute messages
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include "h/mh.h"
   9 #include "sbr/print_help.h"
  10 #include "sbr/arglist.h"
  11 #include "sbr/error.h"
  12 #include "h/fmt_scan.h"
  13 #include "h/rcvmail.h"
  14 #include "h/tws.h"
  15 #include "h/mts.h"
  16 #include "h/done.h"
  17 #include "h/utils.h"
  18 #include "sbr/m_mktemp.h"
  19
  20 #define RCVDIST_SWITCHES \
  21     X("form formfile", 4, FORMSW) \
  22     X("version", 0, VERSIONSW) \
  23     X("help", 0, HELPSW) \
  24
  25 #define X(sw, minchars, id) id,
  26 DEFINE_SWITCH_ENUM(RCVDIST);
  27 #undef X
  28
  29 #define X(sw, minchars, id) { sw, minchars, id },
  30 DEFINE_SWITCH_ARRAY(RCVDIST, switches);
  31 #undef X
  32
  33 static char backup[BUFSIZ] = "";
  34 static char drft[BUFSIZ] = "";
  35 static char tmpfil[BUFSIZ] = "";
  36
  37 /*
  38  * prototypes
  39  */
  40 static void rcvdistout (FILE *, char *, char *);
  41 static void unlink_done (int) NORETURN;
  42
  43
  44 int
  45 main (int argc, char **argv)
  46 {
  47     pid_t child_id;
  48     int vecp;
  49     char *addrs = NULL, *cp, *form = NULL, buf[BUFSIZ], *program;
  50     char **argp, **arguments, **vec;
  51     FILE *fp;
  52     char *tfile = NULL;
  53
  54     if (nmh_init(argv[0], true, false)) { return 1; }
  55
  56     set_done(unlink_done);
  57
  58     /*
  59      * Configure this now, since any unknown switches to rcvdist get
  60      * sent to postproc
  61      */
  62
  63     vec = argsplit(postproc, &program, &vecp);
  64
  65     mts_init ();
  66     arguments = getarguments (invo_name, argc, argv, 1);
  67     argp = arguments;
  68
  69     while ((cp = *argp++)) {
  70         if (*cp == '-') {
  71             switch (smatch (++cp, switches)) {
  72                 case AMBIGSW:
  73                     ambigsw (cp, switches);
  74                     done (1);
  75                 case UNKWNSW:
  76                     vec[vecp++] = --cp;
  77                     continue;
  78
  79                 case HELPSW:
  80                     snprintf (buf, sizeof(buf),
  81                         "%s [switches] [switches for postproc] address ...",
  82                         invo_name);
  83                     print_help (buf, switches, 1);
  84                     done (0);
  85                 case VERSIONSW:
  86                     print_version(invo_name);
  87                     done (0);
  88
  89                 case FORMSW:
  90                     if (!(form = *argp++) || *form == '-')
  91                         die("missing argument to %s", argp[-2]);
  92                     continue;
  93             }
  94         }
  95         addrs = addrs ? add (cp, add (", ", addrs)) : mh_xstrdup(cp);
  96     }
  97
  98     if (addrs == NULL)
  99         die("usage: %s [switches] [switches for postproc] address ...",
 100             invo_name);
 101
 102     umask (~m_gmprot ());
 103
 104     if ((tfile = m_mktemp2(NULL, invo_name, NULL, &fp)) == NULL) {
 105         die("unable to create temporary file in %s", get_temp_dir());
 106     }
 107     strncpy (tmpfil, tfile, sizeof(tmpfil));
 108
 109     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 110     fseek (fp, 0L, SEEK_SET);
 111
 112     if ((tfile = m_mktemp2(NULL, invo_name, NULL, NULL)) == NULL) {
 113         die("unable to create temporary file in %s", get_temp_dir());
 114     }
 115     strncpy (drft, tfile, sizeof(tmpfil));
 116
 117     rcvdistout (fp, form, addrs);
 118     fclose (fp);
 119
 120     if (distout (drft, tmpfil, backup) == NOTOK)
 121         done (1);
 122
 123     vec[vecp++] = "-dist";
 124     if ((cp = context_find ("mhlproc"))) {
 125       vec[vecp++] = "-mhlproc";
 126       vec[vecp++] = cp;
 127     }
 128     vec[vecp++] = drft;
 129     vec[vecp] = NULL;
 130
 131     child_id = fork();
 132     switch (child_id) {
 133         case NOTOK:
 134             adios("fork", "failed:");
 135
 136         case OK:
 137             execvp (program, vec);
 138             fprintf (stderr, "unable to exec ");
 139             perror (postproc);
 140             _exit (1);
 141
 142         default:
 143             done (pidXwait(child_id, postproc));
 144     }
 145
 146     return 0;  /* dead code to satisfy the compiler */
 147 }
 148
 149 /* very similar to routine in replsbr.c */
 150
 151 static int outputlinelen = OUTPUTLINELEN;
 152
 153 static struct format *fmt;
 154
 155 static int dat[5];
 156
 157 static char *addrcomps[] = {
 158     "from",
 159     "sender",
 160     "reply-to",
 161     "to",
 162     "cc",
 163     "bcc",
 164     "resent-from",
 165     "resent-sender",
 166     "resent-reply-to",
 167     "resent-to",
 168     "resent-cc",
 169     "resent-bcc",
 170     NULL
 171 };
 172
 173
 174 static void
 175 rcvdistout (FILE *inb, char *form, char *addrs)
 176 {
 177     int char_read = 0, format_len, i, state;
 178     char **ap;
 179     char *cp, name[NAMESZ], tmpbuf[NMH_BUFSIZ];
 180     charstring_t scanl;
 181     struct comp *cptr;
 182     FILE *out;
 183     m_getfld_state_t gstate;
 184
 185     if (!(out = fopen (drft, "w")))
 186         adios (drft, "unable to create");
 187
 188     /* get new format string */
 189     cp = new_fs (form ? form : rcvdistcomps, NULL, NULL);
 190     format_len = strlen (cp);
 191     fmt_compile (cp, &fmt, 1);
 192
 193     for (ap = addrcomps; *ap; ap++) {
 194         cptr = fmt_findcomp (*ap);
 195         if (cptr)
 196             cptr->c_type |= CT_ADDR;
 197     }
 198
 199     cptr = fmt_findcomp ("addresses");
 200     if (cptr)
 201         cptr->c_text = addrs;
 202
 203     gstate = m_getfld_state_init(inb);
 204     for (;;) {
 205         int msg_count = sizeof tmpbuf;
 206         switch (state = m_getfld2(&gstate, name, tmpbuf, &msg_count)) {
 207             case FLD:
 208             case FLDPLUS:
 209                 i = fmt_addcomptext(name, tmpbuf);
 210                 if (i != -1) {
 211                     char_read += msg_count;
 212                     while (state == FLDPLUS) {
 213                         msg_count = sizeof tmpbuf;
 214                         state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 215                         fmt_appendcomp(i, name, tmpbuf);
 216                         char_read += msg_count;
 217                     }
 218                 }
 219
 220                 while (state == FLDPLUS) {
 221                     msg_count = sizeof tmpbuf;
 222                     state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 223                 }
 224                 break;
 225
 226             case LENERR:
 227             case FMTERR:
 228             case BODY:
 229             case FILEEOF:
 230                 goto finished;
 231
 232             default:
 233                 die("m_getfld2() returned %d", state);
 234         }
 235     }
 236 finished: ;
 237     m_getfld_state_destroy (&gstate);
 238
 239     i = format_len + char_read + 256;
 240     scanl = charstring_create (i + 2);
 241     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 242     dat[3] = outputlinelen;
 243     fmt_scan (fmt, scanl, i, dat, NULL);
 244     fputs (charstring_buffer (scanl), out);
 245
 246     if (ferror (out))
 247         adios (drft, "error writing");
 248     fclose (out);
 249
 250     charstring_free (scanl);
 251     fmt_free(fmt, 1);
 252 }
 253
 254
 255 static void NORETURN
 256 unlink_done (int status)
 257 {
 258     if (backup[0])
 259         (void) m_unlink (backup);
 260     if (drft[0])
 261         (void) m_unlink (drft);
 262     if (tmpfil[0])
 263         (void) m_unlink (tmpfil);
 264
 265     exit (status ? RCV_MBX : RCV_MOK);
 266 }