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

   1
   2 /*
   3  * rcvdist.c -- asynchronously redistribute messages
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/fmt_scan.h>
  12 #include <h/rcvmail.h>
  13 #include <h/tws.h>
  14 #include <h/mts.h>
  15 #include <h/utils.h>
  16
  17 #define RCVDIST_SWITCHES \
  18     X("form formfile", 4, FORMSW) \
  19     X("version", 0, VERSIONSW) \
  20     X("help", 0, HELPSW) \
  21
  22 #define X(sw, minchars, id) id,
  23 DEFINE_SWITCH_ENUM(RCVDIST);
  24 #undef X
  25
  26 #define X(sw, minchars, id) { sw, minchars, id },
  27 DEFINE_SWITCH_ARRAY(RCVDIST, switches);
  28 #undef X
  29
  30 static char backup[BUFSIZ] = "";
  31 static char drft[BUFSIZ] = "";
  32 static char tmpfil[BUFSIZ] = "";
  33
  34 /*
  35  * prototypes
  36  */
  37 static void rcvdistout (FILE *, char *, char *);
  38 static void unlink_done (int) NORETURN;
  39
  40
  41 int
  42 main (int argc, char **argv)
  43 {
  44     pid_t child_id;
  45     int i, vecp;
  46     char *addrs = NULL, *cp, *form = NULL, buf[BUFSIZ], *program;
  47     char **argp, **arguments, **vec;
  48     FILE *fp;
  49     char *tfile = NULL;
  50
  51     done=unlink_done;
  52
  53 #ifdef LOCALE
  54     setlocale(LC_ALL, "");
  55 #endif
  56     invo_name = r1bindex (argv[0], '/');
  57
  58     /* read user profile/context */
  59     context_read();
  60
  61     /*
  62      * Configure this now, since any unknown switches to rcvdist get
  63      * sent to postproc
  64      */
  65
  66     vec = argsplit(postproc, &program, &vecp);
  67
  68     mts_init (invo_name);
  69     arguments = getarguments (invo_name, argc, argv, 1);
  70     argp = arguments;
  71
  72     while ((cp = *argp++)) {
  73         if (*cp == '-') {
  74             switch (smatch (++cp, switches)) {
  75                 case AMBIGSW:
  76                     ambigsw (cp, switches);
  77                     done (1);
  78                 case UNKWNSW:
  79                     vec[vecp++] = --cp;
  80                     continue;
  81
  82                 case HELPSW:
  83                     snprintf (buf, sizeof(buf),
  84                         "%s [switches] [switches for postproc] address ...",
  85                         invo_name);
  86                     print_help (buf, switches, 1);
  87                     done (0);
  88                 case VERSIONSW:
  89                     print_version(invo_name);
  90                     done (0);
  91
  92                 case FORMSW:
  93                     if (!(form = *argp++) || *form == '-')
  94                         adios (NULL, "missing argument to %s", argp[-2]);
  95                     continue;
  96             }
  97         }
  98         addrs = addrs ? add (cp, add (", ", addrs)) : getcpy (cp);
  99     }
 100
 101     if (addrs == NULL)
 102         adios (NULL, "usage: %s [switches] [switches for postproc] address ...",
 103             invo_name);
 104
 105     umask (~m_gmprot ());
 106
 107     tfile = m_mktemp2(NULL, invo_name, NULL, &fp);
 108     if (tfile == NULL) adios("rcvdist", "unable to create temporary file");
 109     strncpy (tmpfil, tfile, sizeof(tmpfil));
 110
 111     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 112     fseek (fp, 0L, SEEK_SET);
 113
 114     tfile = m_mktemp2(NULL, invo_name, NULL, NULL);
 115     if (tfile == NULL) adios("forw", "unable to create temporary file");
 116     strncpy (drft, tfile, sizeof(tmpfil));
 117
 118     rcvdistout (fp, form, addrs);
 119     fclose (fp);
 120
 121     if (distout (drft, tmpfil, backup) == NOTOK)
 122         done (1);
 123
 124     vec[vecp++] = "-dist";
 125     vec[vecp++] = drft;
 126     if ((cp = context_find ("mhlproc"))) {
 127       vec[vecp++] = "-mhlproc";
 128       vec[vecp++] = cp;
 129     }
 130     vec[vecp] = NULL;
 131
 132     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 133         sleep (5);
 134     switch (child_id) {
 135         case NOTOK:
 136             admonish (NULL, "unable to fork");/* fall */
 137         case OK:
 138             execvp (program, vec);
 139             fprintf (stderr, "unable to exec ");
 140             perror (postproc);
 141             _exit (1);
 142
 143         default:
 144             done (pidXwait(child_id, postproc));
 145     }
 146
 147     return 0;  /* dead code to satisfy the compiler */
 148 }
 149
 150 /* very similar to routine in replsbr.c */
 151
 152 #define SBUFSIZ 256
 153
 154 static int outputlinelen = OUTPUTLINELEN;
 155
 156 static struct format *fmt;
 157
 158 static int dat[5];
 159
 160 static char *addrcomps[] = {
 161     "from",
 162     "sender",
 163     "reply-to",
 164     "to",
 165     "cc",
 166     "bcc",
 167     "resent-from",
 168     "resent-sender",
 169     "resent-reply-to",
 170     "resent-to",
 171     "resent-cc",
 172     "resent-bcc",
 173     NULL
 174 };
 175
 176
 177 static void
 178 rcvdistout (FILE *inb, char *form, char *addrs)
 179 {
 180     register int char_read = 0, format_len, i, state;
 181     register char **ap;
 182     char *cp, *scanl, name[NAMESZ], tmpbuf[SBUFSIZ];
 183     register struct comp *cptr;
 184     FILE *out;
 185     m_getfld_state_t gstate = 0;
 186
 187     if (!(out = fopen (drft, "w")))
 188         adios (drft, "unable to create");
 189
 190     /* get new format string */
 191     cp = new_fs (form ? form : rcvdistcomps, NULL, NULL);
 192     format_len = strlen (cp);
 193     fmt_compile (cp, &fmt, 1);
 194
 195     for (ap = addrcomps; *ap; ap++) {
 196         cptr = fmt_findcomp (*ap);
 197         if (cptr)
 198             cptr->c_type |= CT_ADDR;
 199     }
 200
 201     cptr = fmt_findcomp ("addresses");
 202     if (cptr)
 203         cptr->c_text = addrs;
 204
 205     for (;;) {
 206         int msg_count = SBUFSIZ;
 207         switch (state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb)) {
 208             case FLD:
 209             case FLDPLUS:
 210                 i = fmt_addcomptext(name, tmpbuf);
 211                 if (i != -1) {
 212                     char_read += msg_count;
 213                     while (state == FLDPLUS) {
 214                         msg_count = SBUFSIZ;
 215                         state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb);
 216                         fmt_appendcomp(i, name, tmpbuf);
 217                         char_read += msg_count;
 218                     }
 219                 }
 220
 221                 while (state == FLDPLUS) {
 222                     msg_count = SBUFSIZ;
 223                     state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb);
 224                 }
 225                 break;
 226
 227             case LENERR:
 228             case FMTERR:
 229             case BODY:
 230             case FILEEOF:
 231                 goto finished;
 232
 233             default:
 234                 adios (NULL, "m_getfld() returned %d", state);
 235         }
 236     }
 237 finished: ;
 238     m_getfld_state_destroy (&gstate);
 239
 240     i = format_len + char_read + 256;
 241     scanl = mh_xmalloc ((size_t) i + 2);
 242     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 243     dat[3] = outputlinelen;
 244     fmt_scan (fmt, scanl, i + 1, i, dat, NULL);
 245     fputs (scanl, out);
 246
 247     if (ferror (out))
 248         adios (drft, "error writing");
 249     fclose (out);
 250
 251     free (scanl);
 252     fmt_free(fmt, 1);
 253 }
 254
 255
 256 static void
 257 unlink_done (int status)
 258 {
 259     if (backup[0])
 260         unlink (backup);
 261     if (drft[0])
 262         unlink (drft);
 263     if (tmpfil[0])
 264         unlink (tmpfil);
 265
 266     exit (status ? RCV_MBX : RCV_MOK);
 267 }