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 "sbr/arglist.h"
  10 #include "sbr/error.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/done.h"
  16 #include "h/utils.h"
  17 #include "sbr/m_mktemp.h"
  18
  19 #define RCVDIST_SWITCHES \
  20     X("form formfile", 4, FORMSW) \
  21     X("version", 0, VERSIONSW) \
  22     X("help", 0, HELPSW) \
  23
  24 #define X(sw, minchars, id) id,
  25 DEFINE_SWITCH_ENUM(RCVDIST);
  26 #undef X
  27
  28 #define X(sw, minchars, id) { sw, minchars, id },
  29 DEFINE_SWITCH_ARRAY(RCVDIST, switches);
  30 #undef X
  31
  32 static char backup[BUFSIZ] = "";
  33 static char drft[BUFSIZ] = "";
  34 static char tmpfil[BUFSIZ] = "";
  35
  36 /*
  37  * prototypes
  38  */
  39 static void rcvdistout (FILE *, char *, char *);
  40 static void unlink_done (int) NORETURN;
  41
  42
  43 int
  44 main (int argc, char **argv)
  45 {
  46     pid_t child_id;
  47     int vecp;
  48     char *addrs = NULL, *cp, *form = NULL, buf[BUFSIZ], *program;
  49     char **argp, **arguments, **vec;
  50     FILE *fp;
  51     char *tfile = NULL;
  52
  53     if (nmh_init(argv[0], true, false)) { return 1; }
  54
  55     set_done(unlink_done);
  56
  57     /*
  58      * Configure this now, since any unknown switches to rcvdist get
  59      * sent to postproc
  60      */
  61
  62     vec = argsplit(postproc, &program, &vecp);
  63
  64     mts_init ();
  65     arguments = getarguments (invo_name, argc, argv, 1);
  66     argp = arguments;
  67
  68     while ((cp = *argp++)) {
  69         if (*cp == '-') {
  70             switch (smatch (++cp, switches)) {
  71                 case AMBIGSW:
  72                     ambigsw (cp, switches);
  73                     done (1);
  74                 case UNKWNSW:
  75                     vec[vecp++] = --cp;
  76                     continue;
  77
  78                 case HELPSW:
  79                     snprintf (buf, sizeof(buf),
  80                         "%s [switches] [switches for postproc] address ...",
  81                         invo_name);
  82                     print_help (buf, switches, 1);
  83                     done (0);
  84                 case VERSIONSW:
  85                     print_version(invo_name);
  86                     done (0);
  87
  88                 case FORMSW:
  89                     if (!(form = *argp++) || *form == '-')
  90                         die("missing argument to %s", argp[-2]);
  91                     continue;
  92             }
  93         }
  94         addrs = addrs ? add (cp, add (", ", addrs)) : mh_xstrdup(cp);
  95     }
  96
  97     if (addrs == NULL)
  98         die("usage: %s [switches] [switches for postproc] address ...",
  99             invo_name);
 100
 101     umask (~m_gmprot ());
 102
 103     if ((tfile = m_mktemp2(NULL, invo_name, NULL, &fp)) == NULL) {
 104         die("unable to create temporary file in %s", get_temp_dir());
 105     }
 106     strncpy (tmpfil, tfile, sizeof(tmpfil));
 107
 108     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 109     fseek (fp, 0L, SEEK_SET);
 110
 111     if ((tfile = m_mktemp2(NULL, invo_name, NULL, NULL)) == NULL) {
 112         die("unable to create temporary file in %s", get_temp_dir());
 113     }
 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     if ((cp = context_find ("mhlproc"))) {
 124       vec[vecp++] = "-mhlproc";
 125       vec[vecp++] = cp;
 126     }
 127     vec[vecp++] = drft;
 128     vec[vecp] = NULL;
 129
 130     child_id = fork();
 131     switch (child_id) {
 132         case NOTOK:
 133             adios("fork", "failed:");
 134
 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 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[NMH_BUFSIZ];
 179     charstring_t scanl;
 180     struct comp *cptr;
 181     FILE *out;
 182     m_getfld_state_t gstate;
 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     gstate = m_getfld_state_init(inb);
 203     for (;;) {
 204         int msg_count = sizeof tmpbuf;
 205         switch (state = m_getfld2(&gstate, name, tmpbuf, &msg_count)) {
 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 = sizeof tmpbuf;
 213                         state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 214                         fmt_appendcomp(i, name, tmpbuf);
 215                         char_read += msg_count;
 216                     }
 217                 }
 218
 219                 while (state == FLDPLUS) {
 220                     msg_count = sizeof tmpbuf;
 221                     state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 222                 }
 223                 break;
 224
 225             case LENERR:
 226             case FMTERR:
 227             case BODY:
 228             case FILEEOF:
 229                 goto finished;
 230
 231             default:
 232                 die("m_getfld2() returned %d", state);
 233         }
 234     }
 235 finished: ;
 236     m_getfld_state_destroy (&gstate);
 237
 238     i = format_len + char_read + 256;
 239     scanl = charstring_create (i + 2);
 240     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 241     dat[3] = outputlinelen;
 242     fmt_scan (fmt, scanl, i, dat, NULL);
 243     fputs (charstring_buffer (scanl), out);
 244
 245     if (ferror (out))
 246         adios (drft, "error writing");
 247     fclose (out);
 248
 249     charstring_free (scanl);
 250     fmt_free(fmt, 1);
 251 }
 252
 253
 254 static void NORETURN
 255 unlink_done (int status)
 256 {
 257     if (backup[0])
 258         (void) m_unlink (backup);
 259     if (drft[0])
 260         (void) m_unlink (drft);
 261     if (tmpfil[0])
 262         (void) m_unlink (tmpfil);
 263
 264     exit (status ? RCV_MBX : RCV_MOK);
 265 }