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