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