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