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/fmt_new.h"
  10 #include "distsbr.h"
  11 #include "sbr/m_gmprot.h"
  12 #include "sbr/m_getfld.h"
  13 #include "sbr/getarguments.h"
  14 #include "sbr/smatch.h"
  15 #include "sbr/cpydata.h"
  16 #include "sbr/context_find.h"
  17 #include "sbr/ambigsw.h"
  18 #include "sbr/pidstatus.h"
  19 #include "sbr/print_version.h"
  20 #include "sbr/print_help.h"
  21 #include "sbr/arglist.h"
  22 #include "sbr/error.h"
  23 #include "h/fmt_scan.h"
  24 #include "h/tws.h"
  25 #include "h/mts.h"
  26 #include "h/done.h"
  27 #include "h/utils.h"
  28 #include "sbr/m_mktemp.h"
  29
  30 #define RCVDIST_SWITCHES \
  31     X("form formfile", 4, FORMSW) \
  32     X("version", 0, VERSIONSW) \
  33     X("help", 0, HELPSW) \
  34
  35 #define X(sw, minchars, id) id,
  36 DEFINE_SWITCH_ENUM(RCVDIST);
  37 #undef X
  38
  39 #define X(sw, minchars, id) { sw, minchars, id },
  40 DEFINE_SWITCH_ARRAY(RCVDIST, switches);
  41 #undef X
  42
  43 static char backup[BUFSIZ] = "";
  44 static char drft[BUFSIZ] = "";
  45 static char tmpfil[BUFSIZ] = "";
  46
  47 /*
  48  * prototypes
  49  */
  50 static void rcvdistout (FILE *, char *, char *);
  51 static void unlink_done (int) NORETURN;
  52
  53
  54 int
  55 main (int argc, char **argv)
  56 {
  57     pid_t child_id;
  58     int vecp;
  59     char *addrs = NULL, *cp, *form = NULL, buf[BUFSIZ], *program;
  60     char **argp, **arguments, **vec;
  61     FILE *fp;
  62     char *tfile = NULL;
  63
  64     if (nmh_init(argv[0], true, false)) { return 1; }
  65
  66     set_done(unlink_done);
  67
  68     /*
  69      * Configure this now, since any unknown switches to rcvdist get
  70      * sent to postproc
  71      */
  72
  73     vec = argsplit(postproc, &program, &vecp);
  74
  75     mts_init ();
  76     arguments = getarguments (invo_name, argc, argv, 1);
  77     argp = arguments;
  78
  79     while ((cp = *argp++)) {
  80         if (*cp == '-') {
  81             switch (smatch (++cp, switches)) {
  82                 case AMBIGSW:
  83                     ambigsw (cp, switches);
  84                     done (1);
  85                 case UNKWNSW:
  86                     vec[vecp++] = --cp;
  87                     continue;
  88
  89                 case HELPSW:
  90                     snprintf (buf, sizeof(buf),
  91                         "%s [switches] [switches for postproc] address ...",
  92                         invo_name);
  93                     print_help (buf, switches, 1);
  94                     done (0);
  95                 case VERSIONSW:
  96                     print_version(invo_name);
  97                     done (0);
  98
  99                 case FORMSW:
 100                     if (!(form = *argp++) || *form == '-')
 101                         die("missing argument to %s", argp[-2]);
 102                     continue;
 103             }
 104         }
 105         addrs = addrs ? add (cp, add (", ", addrs)) : mh_xstrdup(cp);
 106     }
 107
 108     if (addrs == NULL)
 109         die("usage: %s [switches] [switches for postproc] address ...",
 110             invo_name);
 111
 112     umask (~m_gmprot ());
 113
 114     if ((tfile = m_mktemp2(NULL, invo_name, NULL, &fp)) == NULL) {
 115         die("unable to create temporary file in %s", get_temp_dir());
 116     }
 117     strncpy (tmpfil, tfile, sizeof(tmpfil));
 118
 119     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 120     fseek (fp, 0L, SEEK_SET);
 121
 122     if ((tfile = m_mktemp2(NULL, invo_name, NULL, NULL)) == NULL) {
 123         die("unable to create temporary file in %s", get_temp_dir());
 124     }
 125     strncpy (drft, tfile, sizeof(tmpfil));
 126
 127     rcvdistout (fp, form, addrs);
 128     fclose (fp);
 129
 130     if (distout (drft, tmpfil, backup) == NOTOK)
 131         done (1);
 132
 133     vec[vecp++] = "-dist";
 134     if ((cp = context_find ("mhlproc"))) {
 135       vec[vecp++] = "-mhlproc";
 136       vec[vecp++] = cp;
 137     }
 138     vec[vecp++] = drft;
 139     vec[vecp] = NULL;
 140
 141     child_id = fork();
 142     switch (child_id) {
 143         case NOTOK:
 144             adios("fork", "failed:");
 145
 146         case OK:
 147             execvp (program, vec);
 148             fprintf (stderr, "unable to exec ");
 149             perror (postproc);
 150             _exit (1);
 151
 152         default:
 153             done (pidXwait(child_id, postproc));
 154     }
 155
 156     return 0;  /* dead code to satisfy the compiler */
 157 }
 158
 159 /* very similar to routine in replsbr.c */
 160
 161 static int outputlinelen = OUTPUTLINELEN;
 162
 163 static struct format *fmt;
 164
 165 static int dat[5];
 166
 167 static char *addrcomps[] = {
 168     "from",
 169     "sender",
 170     "reply-to",
 171     "to",
 172     "cc",
 173     "bcc",
 174     "resent-from",
 175     "resent-sender",
 176     "resent-reply-to",
 177     "resent-to",
 178     "resent-cc",
 179     "resent-bcc",
 180     NULL
 181 };
 182
 183
 184 static void
 185 rcvdistout (FILE *inb, char *form, char *addrs)
 186 {
 187     int char_read = 0, format_len, i, state;
 188     char **ap;
 189     char *cp, name[NAMESZ], tmpbuf[NMH_BUFSIZ];
 190     charstring_t scanl;
 191     struct comp *cptr;
 192     FILE *out;
 193     m_getfld_state_t gstate;
 194
 195     if (!(out = fopen (drft, "w")))
 196         adios (drft, "unable to create");
 197
 198     /* get new format string */
 199     cp = new_fs (form ? form : rcvdistcomps, NULL, NULL);
 200     format_len = strlen (cp);
 201     fmt_compile (cp, &fmt, 1);
 202
 203     for (ap = addrcomps; *ap; ap++) {
 204         cptr = fmt_findcomp (*ap);
 205         if (cptr)
 206             cptr->c_type |= CT_ADDR;
 207     }
 208
 209     cptr = fmt_findcomp ("addresses");
 210     if (cptr)
 211         cptr->c_text = addrs;
 212
 213     gstate = m_getfld_state_init(inb);
 214     for (;;) {
 215         int msg_count = sizeof tmpbuf;
 216         switch (state = m_getfld2(&gstate, name, tmpbuf, &msg_count)) {
 217             case FLD:
 218             case FLDPLUS:
 219                 i = fmt_addcomptext(name, tmpbuf);
 220                 if (i != -1) {
 221                     char_read += msg_count;
 222                     while (state == FLDPLUS) {
 223                         msg_count = sizeof tmpbuf;
 224                         state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 225                         fmt_appendcomp(i, name, tmpbuf);
 226                         char_read += msg_count;
 227                     }
 228                 }
 229
 230                 while (state == FLDPLUS) {
 231                     msg_count = sizeof tmpbuf;
 232                     state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 233                 }
 234                 break;
 235
 236             case LENERR:
 237             case FMTERR:
 238             case BODY:
 239             case FILEEOF:
 240                 goto finished;
 241
 242             default:
 243                 die("m_getfld2() returned %d", state);
 244         }
 245     }
 246 finished: ;
 247     m_getfld_state_destroy (&gstate);
 248
 249     i = format_len + char_read + 256;
 250     scanl = charstring_create (i + 2);
 251     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 252     dat[3] = outputlinelen;
 253     fmt_scan (fmt, scanl, i, dat, NULL);
 254     fputs (charstring_buffer (scanl), out);
 255
 256     if (ferror (out))
 257         adios (drft, "error writing");
 258     fclose (out);
 259
 260     charstring_free (scanl);
 261     fmt_free(fmt, 1);
 262 }
 263
 264
 265 static void NORETURN
 266 unlink_done (int status)
 267 {
 268     if (backup[0])
 269         (void) m_unlink (backup);
 270     if (drft[0])
 271         (void) m_unlink (drft);
 272     if (tmpfil[0])
 273         (void) m_unlink (tmpfil);
 274
 275     exit(status ? 1 : 0);
 276 }