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