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     if (nmh_init(argv[0], 2)) { return 1; }
  52
  53     done=unlink_done;
  54
  55     /*
  56      * Configure this now, since any unknown switches to rcvdist get
  57      * sent to postproc
  58      */
  59
  60     vec = argsplit(postproc, &program, &vecp);
  61
  62     mts_init ();
  63     arguments = getarguments (invo_name, argc, argv, 1);
  64     argp = arguments;
  65
  66     while ((cp = *argp++)) {
  67         if (*cp == '-') {
  68             switch (smatch (++cp, switches)) {
  69                 case AMBIGSW:
  70                     ambigsw (cp, switches);
  71                     done (1);
  72                 case UNKWNSW:
  73                     vec[vecp++] = --cp;
  74                     continue;
  75
  76                 case HELPSW:
  77                     snprintf (buf, sizeof(buf),
  78                         "%s [switches] [switches for postproc] address ...",
  79                         invo_name);
  80                     print_help (buf, switches, 1);
  81                     done (0);
  82                 case VERSIONSW:
  83                     print_version(invo_name);
  84                     done (0);
  85
  86                 case FORMSW:
  87                     if (!(form = *argp++) || *form == '-')
  88                         adios (NULL, "missing argument to %s", argp[-2]);
  89                     continue;
  90             }
  91         }
  92         addrs = addrs ? add (cp, add (", ", addrs)) : getcpy (cp);
  93     }
  94
  95     if (addrs == NULL)
  96         adios (NULL, "usage: %s [switches] [switches for postproc] address ...",
  97             invo_name);
  98
  99     umask (~m_gmprot ());
 100
 101     if ((tfile = m_mktemp2(NULL, invo_name, NULL, &fp)) == NULL) {
 102         adios(NULL, "unable to create temporary file in %s", get_temp_dir());
 103     }
 104     strncpy (tmpfil, tfile, sizeof(tmpfil));
 105
 106     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 107     fseek (fp, 0L, SEEK_SET);
 108
 109     if ((tfile = m_mktemp2(NULL, invo_name, NULL, NULL)) == NULL) {
 110         adios(NULL, "unable to create temporary file in %s", get_temp_dir());
 111     }
 112     strncpy (drft, tfile, sizeof(tmpfil));
 113
 114     rcvdistout (fp, form, addrs);
 115     fclose (fp);
 116
 117     if (distout (drft, tmpfil, backup) == NOTOK)
 118         done (1);
 119
 120     vec[vecp++] = "-dist";
 121     if ((cp = context_find ("mhlproc"))) {
 122       vec[vecp++] = "-mhlproc";
 123       vec[vecp++] = cp;
 124     }
 125     vec[vecp++] = drft;
 126     vec[vecp] = NULL;
 127
 128     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 129         sleep (5);
 130     switch (child_id) {
 131         case NOTOK:
 132             admonish (NULL, "unable to fork");/* fall */
 133         case OK:
 134             execvp (program, vec);
 135             fprintf (stderr, "unable to exec ");
 136             perror (postproc);
 137             _exit (1);
 138
 139         default:
 140             done (pidXwait(child_id, postproc));
 141     }
 142
 143     return 0;  /* dead code to satisfy the compiler */
 144 }
 145
 146 /* very similar to routine in replsbr.c */
 147
 148 #define SBUFSIZ 256
 149
 150 static int outputlinelen = OUTPUTLINELEN;
 151
 152 static struct format *fmt;
 153
 154 static int dat[5];
 155
 156 static char *addrcomps[] = {
 157     "from",
 158     "sender",
 159     "reply-to",
 160     "to",
 161     "cc",
 162     "bcc",
 163     "resent-from",
 164     "resent-sender",
 165     "resent-reply-to",
 166     "resent-to",
 167     "resent-cc",
 168     "resent-bcc",
 169     NULL
 170 };
 171
 172
 173 static void
 174 rcvdistout (FILE *inb, char *form, char *addrs)
 175 {
 176     int char_read = 0, format_len, i, state;
 177     char **ap;
 178     char *cp, name[NAMESZ], tmpbuf[SBUFSIZ];
 179     charstring_t scanl;
 180     struct comp *cptr;
 181     FILE *out;
 182     m_getfld_state_t gstate = 0;
 183
 184     if (!(out = fopen (drft, "w")))
 185         adios (drft, "unable to create");
 186
 187     /* get new format string */
 188     cp = new_fs (form ? form : rcvdistcomps, NULL, NULL);
 189     format_len = strlen (cp);
 190     fmt_compile (cp, &fmt, 1);
 191
 192     for (ap = addrcomps; *ap; ap++) {
 193         cptr = fmt_findcomp (*ap);
 194         if (cptr)
 195             cptr->c_type |= CT_ADDR;
 196     }
 197
 198     cptr = fmt_findcomp ("addresses");
 199     if (cptr)
 200         cptr->c_text = addrs;
 201
 202     for (;;) {
 203         int msg_count = SBUFSIZ;
 204         switch (state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb)) {
 205             case FLD:
 206             case FLDPLUS:
 207                 i = fmt_addcomptext(name, tmpbuf);
 208                 if (i != -1) {
 209                     char_read += msg_count;
 210                     while (state == FLDPLUS) {
 211                         msg_count = SBUFSIZ;
 212                         state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb);
 213                         fmt_appendcomp(i, name, tmpbuf);
 214                         char_read += msg_count;
 215                     }
 216                 }
 217
 218                 while (state == FLDPLUS) {
 219                     msg_count = SBUFSIZ;
 220                     state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb);
 221                 }
 222                 break;
 223
 224             case LENERR:
 225             case FMTERR:
 226             case BODY:
 227             case FILEEOF:
 228                 goto finished;
 229
 230             default:
 231                 adios (NULL, "m_getfld() returned %d", state);
 232         }
 233     }
 234 finished: ;
 235     m_getfld_state_destroy (&gstate);
 236
 237     i = format_len + char_read + 256;
 238     scanl = charstring_create (i + 2);
 239     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 240     dat[3] = outputlinelen;
 241     fmt_scan (fmt, scanl, i, dat, NULL);
 242     fputs (charstring_buffer (scanl), out);
 243
 244     if (ferror (out))
 245         adios (drft, "error writing");
 246     fclose (out);
 247
 248     charstring_free (scanl);
 249     fmt_free(fmt, 1);
 250 }
 251
 252
 253 static void
 254 unlink_done (int status)
 255 {
 256     if (backup[0])
 257         (void) m_unlink (backup);
 258     if (drft[0])
 259         (void) m_unlink (drft);
 260     if (tmpfil[0])
 261         (void) m_unlink (tmpfil);
 262
 263     exit (status ? RCV_MBX : RCV_MOK);
 264 }