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