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