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