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 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     child_id = fork();
 128     switch (child_id) {
 129         case NOTOK:
 130             inform("unable to fork, continuing...");
 131             /* FALLTHRU */
 132         case OK:
 133             execvp (program, vec);
 134             fprintf (stderr, "unable to exec ");
 135             perror (postproc);
 136             _exit (1);
 137
 138         default:
 139             done (pidXwait(child_id, postproc));
 140     }
 141
 142     return 0;  /* dead code to satisfy the compiler */
 143 }
 144
 145 /* very similar to routine in replsbr.c */
 146
 147 static int outputlinelen = OUTPUTLINELEN;
 148
 149 static struct format *fmt;
 150
 151 static int dat[5];
 152
 153 static char *addrcomps[] = {
 154     "from",
 155     "sender",
 156     "reply-to",
 157     "to",
 158     "cc",
 159     "bcc",
 160     "resent-from",
 161     "resent-sender",
 162     "resent-reply-to",
 163     "resent-to",
 164     "resent-cc",
 165     "resent-bcc",
 166     NULL
 167 };
 168
 169
 170 static void
 171 rcvdistout (FILE *inb, char *form, char *addrs)
 172 {
 173     int char_read = 0, format_len, i, state;
 174     char **ap;
 175     char *cp, name[NAMESZ], tmpbuf[NMH_BUFSIZ];
 176     charstring_t scanl;
 177     struct comp *cptr;
 178     FILE *out;
 179     m_getfld_state_t gstate;
 180
 181     if (!(out = fopen (drft, "w")))
 182         adios (drft, "unable to create");
 183
 184     /* get new format string */
 185     cp = new_fs (form ? form : rcvdistcomps, NULL, NULL);
 186     format_len = strlen (cp);
 187     fmt_compile (cp, &fmt, 1);
 188
 189     for (ap = addrcomps; *ap; ap++) {
 190         cptr = fmt_findcomp (*ap);
 191         if (cptr)
 192             cptr->c_type |= CT_ADDR;
 193     }
 194
 195     cptr = fmt_findcomp ("addresses");
 196     if (cptr)
 197         cptr->c_text = addrs;
 198
 199     gstate = m_getfld_state_init(inb);
 200     for (;;) {
 201         int msg_count = sizeof tmpbuf;
 202         switch (state = m_getfld2(&gstate, name, tmpbuf, &msg_count)) {
 203             case FLD:
 204             case FLDPLUS:
 205                 i = fmt_addcomptext(name, tmpbuf);
 206                 if (i != -1) {
 207                     char_read += msg_count;
 208                     while (state == FLDPLUS) {
 209                         msg_count = sizeof tmpbuf;
 210                         state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 211                         fmt_appendcomp(i, name, tmpbuf);
 212                         char_read += msg_count;
 213                     }
 214                 }
 215
 216                 while (state == FLDPLUS) {
 217                     msg_count = sizeof tmpbuf;
 218                     state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 219                 }
 220                 break;
 221
 222             case LENERR:
 223             case FMTERR:
 224             case BODY:
 225             case FILEEOF:
 226                 goto finished;
 227
 228             default:
 229                 adios (NULL, "m_getfld2() returned %d", state);
 230         }
 231     }
 232 finished: ;
 233     m_getfld_state_destroy (&gstate);
 234
 235     i = format_len + char_read + 256;
 236     scanl = charstring_create (i + 2);
 237     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 238     dat[3] = outputlinelen;
 239     fmt_scan (fmt, scanl, i, dat, NULL);
 240     fputs (charstring_buffer (scanl), out);
 241
 242     if (ferror (out))
 243         adios (drft, "error writing");
 244     fclose (out);
 245
 246     charstring_free (scanl);
 247     fmt_free(fmt, 1);
 248 }
 249
 250
 251 static void NORETURN
 252 unlink_done (int status)
 253 {
 254     if (backup[0])
 255         (void) m_unlink (backup);
 256     if (drft[0])
 257         (void) m_unlink (drft);
 258     if (tmpfil[0])
 259         (void) m_unlink (tmpfil);
 260
 261     exit (status ? RCV_MBX : RCV_MOK);
 262 }