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 <h/fmt_scan.h>
  10 #include <h/rcvmail.h>
  11 #include <h/tws.h>
  12 #include <h/mts.h>
  13 #include <h/utils.h>
  14
  15 #define RCVDIST_SWITCHES \
  16     X("form formfile", 4, FORMSW) \
  17     X("version", 0, VERSIONSW) \
  18     X("help", 0, HELPSW) \
  19
  20 #define X(sw, minchars, id) id,
  21 DEFINE_SWITCH_ENUM(RCVDIST);
  22 #undef X
  23
  24 #define X(sw, minchars, id) { sw, minchars, id },
  25 DEFINE_SWITCH_ARRAY(RCVDIST, switches);
  26 #undef X
  27
  28 static char backup[BUFSIZ] = "";
  29 static char drft[BUFSIZ] = "";
  30 static char tmpfil[BUFSIZ] = "";
  31
  32 /*
  33  * prototypes
  34  */
  35 static void rcvdistout (FILE *, char *, char *);
  36 static void unlink_done (int) NORETURN;
  37
  38
  39 int
  40 main (int argc, char **argv)
  41 {
  42     pid_t child_id;
  43     int i, vecp;
  44     char *addrs = NULL, *cp, *form = NULL, buf[BUFSIZ], *program;
  45     char **argp, **arguments, **vec;
  46     FILE *fp;
  47     char *tfile = NULL;
  48
  49     if (nmh_init(argv[0], 2)) { return 1; }
  50
  51     done=unlink_done;
  52
  53     /*
  54      * Configure this now, since any unknown switches to rcvdist get
  55      * sent to postproc
  56      */
  57
  58     vec = argsplit(postproc, &program, &vecp);
  59
  60     mts_init ();
  61     arguments = getarguments (invo_name, argc, argv, 1);
  62     argp = arguments;
  63
  64     while ((cp = *argp++)) {
  65         if (*cp == '-') {
  66             switch (smatch (++cp, switches)) {
  67                 case AMBIGSW:
  68                     ambigsw (cp, switches);
  69                     done (1);
  70                 case UNKWNSW:
  71                     vec[vecp++] = --cp;
  72                     continue;
  73
  74                 case HELPSW:
  75                     snprintf (buf, sizeof(buf),
  76                         "%s [switches] [switches for postproc] address ...",
  77                         invo_name);
  78                     print_help (buf, switches, 1);
  79                     done (0);
  80                 case VERSIONSW:
  81                     print_version(invo_name);
  82                     done (0);
  83
  84                 case FORMSW:
  85                     if (!(form = *argp++) || *form == '-')
  86                         adios (NULL, "missing argument to %s", argp[-2]);
  87                     continue;
  88             }
  89         }
  90         addrs = addrs ? add (cp, add (", ", addrs)) : mh_xstrdup(cp);
  91     }
  92
  93     if (addrs == NULL)
  94         adios (NULL, "usage: %s [switches] [switches for postproc] address ...",
  95             invo_name);
  96
  97     umask (~m_gmprot ());
  98
  99     if ((tfile = m_mktemp2(NULL, invo_name, NULL, &fp)) == NULL) {
 100         adios(NULL, "unable to create temporary file in %s", get_temp_dir());
 101     }
 102     strncpy (tmpfil, tfile, sizeof(tmpfil));
 103
 104     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 105     fseek (fp, 0L, SEEK_SET);
 106
 107     if ((tfile = m_mktemp2(NULL, invo_name, NULL, NULL)) == NULL) {
 108         adios(NULL, "unable to create temporary file in %s", get_temp_dir());
 109     }
 110     strncpy (drft, tfile, sizeof(tmpfil));
 111
 112     rcvdistout (fp, form, addrs);
 113     fclose (fp);
 114
 115     if (distout (drft, tmpfil, backup) == NOTOK)
 116         done (1);
 117
 118     vec[vecp++] = "-dist";
 119     if ((cp = context_find ("mhlproc"))) {
 120       vec[vecp++] = "-mhlproc";
 121       vec[vecp++] = cp;
 122     }
 123     vec[vecp++] = drft;
 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             inform("unable to fork, continuing...");
 131             /* FALLTHRU */
 132         case OK:
 133             execvp (program, vec);
 134             fprintf (stderr, "unable to exec ");
 135             perror (postproc);
 136             _exit (1);
 137
 138         default:
 139             done (pidXwait(child_id, postproc));
 140     }
 141
 142     return 0;  /* dead code to satisfy the compiler */
 143 }
 144
 145 /* very similar to routine in replsbr.c */
 146
 147 static int outputlinelen = OUTPUTLINELEN;
 148
 149 static struct format *fmt;
 150
 151 static int dat[5];
 152
 153 static char *addrcomps[] = {
 154     "from",
 155     "sender",
 156     "reply-to",
 157     "to",
 158     "cc",
 159     "bcc",
 160     "resent-from",
 161     "resent-sender",
 162     "resent-reply-to",
 163     "resent-to",
 164     "resent-cc",
 165     "resent-bcc",
 166     NULL
 167 };
 168
 169
 170 static void
 171 rcvdistout (FILE *inb, char *form, char *addrs)
 172 {
 173     int char_read = 0, format_len, i, state;
 174     char **ap;
 175     char *cp, name[NAMESZ], tmpbuf[NMH_BUFSIZ];
 176     charstring_t scanl;
 177     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 = sizeof tmpbuf;
 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 = sizeof tmpbuf;
 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 = sizeof tmpbuf;
 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 = charstring_create (i + 2);
 236     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 237     dat[3] = outputlinelen;
 238     fmt_scan (fmt, scanl, i, dat, NULL);
 239     fputs (charstring_buffer (scanl), out);
 240
 241     if (ferror (out))
 242         adios (drft, "error writing");
 243     fclose (out);
 244
 245     charstring_free (scanl);
 246     fmt_free(fmt, 1);
 247 }
 248
 249
 250 static void
 251 unlink_done (int status)
 252 {
 253     if (backup[0])
 254         (void) m_unlink (backup);
 255     if (drft[0])
 256         (void) m_unlink (drft);
 257     if (tmpfil[0])
 258         (void) m_unlink (tmpfil);
 259
 260     exit (status ? RCV_MBX : RCV_MOK);
 261 }