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     setlocale(LC_ALL, "");
  54     invo_name = r1bindex (argv[0], '/');
  55
  56     /* read user profile/context */
  57     context_read();
  58
  59     /*
  60      * Configure this now, since any unknown switches to rcvdist get
  61      * sent to postproc
  62      */
  63
  64     vec = argsplit(postproc, &program, &vecp);
  65
  66     mts_init (invo_name);
  67     arguments = getarguments (invo_name, argc, argv, 1);
  68     argp = arguments;
  69
  70     while ((cp = *argp++)) {
  71         if (*cp == '-') {
  72             switch (smatch (++cp, switches)) {
  73                 case AMBIGSW:
  74                     ambigsw (cp, switches);
  75                     done (1);
  76                 case UNKWNSW:
  77                     vec[vecp++] = --cp;
  78                     continue;
  79
  80                 case HELPSW:
  81                     snprintf (buf, sizeof(buf),
  82                         "%s [switches] [switches for postproc] address ...",
  83                         invo_name);
  84                     print_help (buf, switches, 1);
  85                     done (0);
  86                 case VERSIONSW:
  87                     print_version(invo_name);
  88                     done (0);
  89
  90                 case FORMSW:
  91                     if (!(form = *argp++) || *form == '-')
  92                         adios (NULL, "missing argument to %s", argp[-2]);
  93                     continue;
  94             }
  95         }
  96         addrs = addrs ? add (cp, add (", ", addrs)) : getcpy (cp);
  97     }
  98
  99     if (addrs == NULL)
 100         adios (NULL, "usage: %s [switches] [switches for postproc] address ...",
 101             invo_name);
 102
 103     umask (~m_gmprot ());
 104
 105     tfile = m_mktemp2(NULL, invo_name, NULL, &fp);
 106     if (tfile == NULL) adios("rcvdist", "unable to create temporary file");
 107     strncpy (tmpfil, tfile, sizeof(tmpfil));
 108
 109     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 110     fseek (fp, 0L, SEEK_SET);
 111
 112     tfile = m_mktemp2(NULL, invo_name, NULL, NULL);
 113     if (tfile == NULL) adios("forw", "unable to create temporary file");
 114     strncpy (drft, tfile, sizeof(tmpfil));
 115
 116     rcvdistout (fp, form, addrs);
 117     fclose (fp);
 118
 119     if (distout (drft, tmpfil, backup) == NOTOK)
 120         done (1);
 121
 122     vec[vecp++] = "-dist";
 123     vec[vecp++] = drft;
 124     if ((cp = context_find ("mhlproc"))) {
 125       vec[vecp++] = "-mhlproc";
 126       vec[vecp++] = cp;
 127     }
 128     vec[vecp] = NULL;
 129
 130     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 131         sleep (5);
 132     switch (child_id) {
 133         case NOTOK:
 134             admonish (NULL, "unable to fork");/* fall */
 135         case OK:
 136             execvp (program, vec);
 137             fprintf (stderr, "unable to exec ");
 138             perror (postproc);
 139             _exit (1);
 140
 141         default:
 142             done (pidXwait(child_id, postproc));
 143     }
 144
 145     return 0;  /* dead code to satisfy the compiler */
 146 }
 147
 148 /* very similar to routine in replsbr.c */
 149
 150 #define SBUFSIZ 256
 151
 152 static int outputlinelen = OUTPUTLINELEN;
 153
 154 static struct format *fmt;
 155
 156 static int dat[5];
 157
 158 static char *addrcomps[] = {
 159     "from",
 160     "sender",
 161     "reply-to",
 162     "to",
 163     "cc",
 164     "bcc",
 165     "resent-from",
 166     "resent-sender",
 167     "resent-reply-to",
 168     "resent-to",
 169     "resent-cc",
 170     "resent-bcc",
 171     NULL
 172 };
 173
 174
 175 static void
 176 rcvdistout (FILE *inb, char *form, char *addrs)
 177 {
 178     register int char_read = 0, format_len, i, state;
 179     register char **ap;
 180     char *cp, *scanl, name[NAMESZ], tmpbuf[SBUFSIZ];
 181     register struct comp *cptr;
 182     FILE *out;
 183     m_getfld_state_t gstate = 0;
 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     for (;;) {
 204         int msg_count = SBUFSIZ;
 205         switch (state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb)) {
 206             case FLD:
 207             case FLDPLUS:
 208                 i = fmt_addcomptext(name, tmpbuf);
 209                 if (i != -1) {
 210                     char_read += msg_count;
 211                     while (state == FLDPLUS) {
 212                         msg_count = SBUFSIZ;
 213                         state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb);
 214                         fmt_appendcomp(i, name, tmpbuf);
 215                         char_read += msg_count;
 216                     }
 217                 }
 218
 219                 while (state == FLDPLUS) {
 220                     msg_count = SBUFSIZ;
 221                     state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb);
 222                 }
 223                 break;
 224
 225             case LENERR:
 226             case FMTERR:
 227             case BODY:
 228             case FILEEOF:
 229                 goto finished;
 230
 231             default:
 232                 adios (NULL, "m_getfld() returned %d", state);
 233         }
 234     }
 235 finished: ;
 236     m_getfld_state_destroy (&gstate);
 237
 238     i = format_len + char_read + 256;
 239     scanl = mh_xmalloc ((size_t) i + 2);
 240     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 241     dat[3] = outputlinelen;
 242     fmt_scan (fmt, scanl, i + 1, i, dat, NULL);
 243     fputs (scanl, out);
 244
 245     if (ferror (out))
 246         adios (drft, "error writing");
 247     fclose (out);
 248
 249     free (scanl);
 250     fmt_free(fmt, 1);
 251 }
 252
 253
 254 static void
 255 unlink_done (int status)
 256 {
 257     if (backup[0])
 258         unlink (backup);
 259     if (drft[0])
 260         unlink (drft);
 261     if (tmpfil[0])
 262         unlink (tmpfil);
 263
 264     exit (status ? RCV_MBX : RCV_MOK);
 265 }