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