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 = 1;
  46     char *addrs = NULL, *cp, *form = NULL, buf[BUFSIZ];
  47     char **argp, **arguments, *vec[MAXARGS];
  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     mts_init (invo_name);
  62     arguments = getarguments (invo_name, argc, argv, 1);
  63     argp = arguments;
  64
  65     while ((cp = *argp++)) {
  66         if (*cp == '-') {
  67             switch (smatch (++cp, switches)) {
  68                 case AMBIGSW:
  69                     ambigsw (cp, switches);
  70                     done (1);
  71                 case UNKWNSW:
  72                     vec[vecp++] = --cp;
  73                     continue;
  74
  75                 case HELPSW:
  76                     snprintf (buf, sizeof(buf),
  77                         "%s [switches] [switches for postproc] address ...",
  78                         invo_name);
  79                     print_help (buf, switches, 1);
  80                     done (0);
  81                 case VERSIONSW:
  82                     print_version(invo_name);
  83                     done (0);
  84
  85                 case FORMSW:
  86                     if (!(form = *argp++) || *form == '-')
  87                         adios (NULL, "missing argument to %s", argp[-2]);
  88                     continue;
  89             }
  90         }
  91         addrs = addrs ? add (cp, add (", ", addrs)) : getcpy (cp);
  92     }
  93
  94     if (addrs == NULL)
  95         adios (NULL, "usage: %s [switches] [switches for postproc] address ...",
  96             invo_name);
  97
  98     umask (~m_gmprot ());
  99
 100     tfile = m_mktemp2(NULL, invo_name, NULL, &fp);
 101     if (tfile == NULL) adios("rcvdist", "unable to create temporary file");
 102     strncpy (tmpfil, tfile, sizeof(tmpfil));
 103
 104     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 105     fseek (fp, 0L, SEEK_SET);
 106
 107     tfile = m_mktemp2(NULL, invo_name, NULL, NULL);
 108     if (tfile == NULL) adios("forw", "unable to create temporary file");
 109     strncpy (drft, tfile, sizeof(tmpfil));
 110
 111     rcvdistout (fp, form, addrs);
 112     fclose (fp);
 113
 114     if (distout (drft, tmpfil, backup) == NOTOK)
 115         done (1);
 116
 117     vec[0] = r1bindex (postproc, '/');
 118     vec[vecp++] = "-dist";
 119     vec[vecp++] = drft;
 120     if ((cp = context_find ("mhlproc"))) {
 121       vec[vecp++] = "-mhlproc";
 122       vec[vecp++] = cp;
 123     }
 124     vec[vecp] = NULL;
 125
 126     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 127         sleep (5);
 128     switch (child_id) {
 129         case NOTOK:
 130             admonish (NULL, "unable to fork");/* fall */
 131         case OK:
 132             execvp (postproc, vec);
 133             fprintf (stderr, "unable to exec ");
 134             perror (postproc);
 135             _exit (1);
 136
 137         default:
 138             done (pidXwait(child_id, postproc));
 139     }
 140
 141     return 0;  /* dead code to satisfy the compiler */
 142 }
 143
 144 /* very similar to routine in replsbr.c */
 145
 146 #define SBUFSIZ 256
 147
 148 static int outputlinelen = OUTPUTLINELEN;
 149
 150 static struct format *fmt;
 151
 152 static int dat[5];
 153
 154 static char *addrcomps[] = {
 155     "from",
 156     "sender",
 157     "reply-to",
 158     "to",
 159     "cc",
 160     "bcc",
 161     "resent-from",
 162     "resent-sender",
 163     "resent-reply-to",
 164     "resent-to",
 165     "resent-cc",
 166     "resent-bcc",
 167     NULL
 168 };
 169
 170
 171 static void
 172 rcvdistout (FILE *inb, char *form, char *addrs)
 173 {
 174     register int char_read = 0, format_len, i, state;
 175     register char **ap;
 176     char *cp, *scanl, name[NAMESZ], tmpbuf[SBUFSIZ];
 177     register struct comp *cptr;
 178     FILE *out;
 179     m_getfld_state_t gstate = 0;
 180
 181     if (!(out = fopen (drft, "w")))
 182         adios (drft, "unable to create");
 183
 184     /* get new format string */
 185     cp = new_fs (form ? form : rcvdistcomps, NULL, NULL);
 186     format_len = strlen (cp);
 187     fmt_compile (cp, &fmt, 1);
 188
 189     for (ap = addrcomps; *ap; ap++) {
 190         cptr = fmt_findcomp (*ap);
 191         if (cptr)
 192             cptr->c_type |= CT_ADDR;
 193     }
 194
 195     cptr = fmt_findcomp ("addresses");
 196     if (cptr)
 197         cptr->c_text = addrs;
 198
 199     for (;;) {
 200         int msg_count = SBUFSIZ;
 201         switch (state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb)) {
 202             case FLD:
 203             case FLDPLUS:
 204                 i = fmt_addcomptext(name, tmpbuf);
 205                 if (i != -1) {
 206                     char_read += msg_count;
 207                     while (state == FLDPLUS) {
 208                         msg_count = SBUFSIZ;
 209                         state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb);
 210                         fmt_appendcomp(i, name, tmpbuf);
 211                         char_read += msg_count;
 212                     }
 213                 }
 214
 215                 while (state == FLDPLUS) {
 216                     msg_count = SBUFSIZ;
 217                     state = m_getfld (&gstate, name, tmpbuf, &msg_count, inb);
 218                 }
 219                 break;
 220
 221             case LENERR:
 222             case FMTERR:
 223             case BODY:
 224             case FILEEOF:
 225                 goto finished;
 226
 227             default:
 228                 adios (NULL, "m_getfld() returned %d", state);
 229         }
 230     }
 231 finished: ;
 232     m_getfld_state_destroy (&gstate);
 233
 234     i = format_len + char_read + 256;
 235     scanl = mh_xmalloc ((size_t) i + 2);
 236     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 237     dat[3] = outputlinelen;
 238     fmt_scan (fmt, scanl, i + 1, i, dat);
 239     fputs (scanl, out);
 240
 241     if (ferror (out))
 242         adios (drft, "error writing");
 243     fclose (out);
 244
 245     free (scanl);
 246     fmt_free(fmt, 1);
 247 }
 248
 249
 250 static void
 251 unlink_done (int status)
 252 {
 253     if (backup[0])
 254         unlink (backup);
 255     if (drft[0])
 256         unlink (drft);
 257     if (tmpfil[0])
 258         unlink (tmpfil);
 259
 260     exit (status ? RCV_MBX : RCV_MOK);
 261 }