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/getarguments.h"
  10 #include "sbr/smatch.h"
  11 #include "sbr/cpydata.h"
  12 #include "sbr/context_find.h"
  13 #include "sbr/ambigsw.h"
  14 #include "sbr/pidstatus.h"
  15 #include "sbr/print_version.h"
  16 #include "sbr/print_help.h"
  17 #include "sbr/arglist.h"
  18 #include "sbr/error.h"
  19 #include "h/fmt_scan.h"
  20 #include "h/rcvmail.h"
  21 #include "h/tws.h"
  22 #include "h/mts.h"
  23 #include "h/done.h"
  24 #include "h/utils.h"
  25 #include "sbr/m_mktemp.h"
  26
  27 #define RCVDIST_SWITCHES \
  28     X("form formfile", 4, FORMSW) \
  29     X("version", 0, VERSIONSW) \
  30     X("help", 0, HELPSW) \
  31
  32 #define X(sw, minchars, id) id,
  33 DEFINE_SWITCH_ENUM(RCVDIST);
  34 #undef X
  35
  36 #define X(sw, minchars, id) { sw, minchars, id },
  37 DEFINE_SWITCH_ARRAY(RCVDIST, switches);
  38 #undef X
  39
  40 static char backup[BUFSIZ] = "";
  41 static char drft[BUFSIZ] = "";
  42 static char tmpfil[BUFSIZ] = "";
  43
  44 /*
  45  * prototypes
  46  */
  47 static void rcvdistout (FILE *, char *, char *);
  48 static void unlink_done (int) NORETURN;
  49
  50
  51 int
  52 main (int argc, char **argv)
  53 {
  54     pid_t child_id;
  55     int vecp;
  56     char *addrs = NULL, *cp, *form = NULL, buf[BUFSIZ], *program;
  57     char **argp, **arguments, **vec;
  58     FILE *fp;
  59     char *tfile = NULL;
  60
  61     if (nmh_init(argv[0], true, false)) { return 1; }
  62
  63     set_done(unlink_done);
  64
  65     /*
  66      * Configure this now, since any unknown switches to rcvdist get
  67      * sent to postproc
  68      */
  69
  70     vec = argsplit(postproc, &program, &vecp);
  71
  72     mts_init ();
  73     arguments = getarguments (invo_name, argc, argv, 1);
  74     argp = arguments;
  75
  76     while ((cp = *argp++)) {
  77         if (*cp == '-') {
  78             switch (smatch (++cp, switches)) {
  79                 case AMBIGSW:
  80                     ambigsw (cp, switches);
  81                     done (1);
  82                 case UNKWNSW:
  83                     vec[vecp++] = --cp;
  84                     continue;
  85
  86                 case HELPSW:
  87                     snprintf (buf, sizeof(buf),
  88                         "%s [switches] [switches for postproc] address ...",
  89                         invo_name);
  90                     print_help (buf, switches, 1);
  91                     done (0);
  92                 case VERSIONSW:
  93                     print_version(invo_name);
  94                     done (0);
  95
  96                 case FORMSW:
  97                     if (!(form = *argp++) || *form == '-')
  98                         die("missing argument to %s", argp[-2]);
  99                     continue;
 100             }
 101         }
 102         addrs = addrs ? add (cp, add (", ", addrs)) : mh_xstrdup(cp);
 103     }
 104
 105     if (addrs == NULL)
 106         die("usage: %s [switches] [switches for postproc] address ...",
 107             invo_name);
 108
 109     umask (~m_gmprot ());
 110
 111     if ((tfile = m_mktemp2(NULL, invo_name, NULL, &fp)) == NULL) {
 112         die("unable to create temporary file in %s", get_temp_dir());
 113     }
 114     strncpy (tmpfil, tfile, sizeof(tmpfil));
 115
 116     cpydata (fileno (stdin), fileno (fp), "message", tmpfil);
 117     fseek (fp, 0L, SEEK_SET);
 118
 119     if ((tfile = m_mktemp2(NULL, invo_name, NULL, NULL)) == NULL) {
 120         die("unable to create temporary file in %s", get_temp_dir());
 121     }
 122     strncpy (drft, tfile, sizeof(tmpfil));
 123
 124     rcvdistout (fp, form, addrs);
 125     fclose (fp);
 126
 127     if (distout (drft, tmpfil, backup) == NOTOK)
 128         done (1);
 129
 130     vec[vecp++] = "-dist";
 131     if ((cp = context_find ("mhlproc"))) {
 132       vec[vecp++] = "-mhlproc";
 133       vec[vecp++] = cp;
 134     }
 135     vec[vecp++] = drft;
 136     vec[vecp] = NULL;
 137
 138     child_id = fork();
 139     switch (child_id) {
 140         case NOTOK:
 141             adios("fork", "failed:");
 142
 143         case OK:
 144             execvp (program, vec);
 145             fprintf (stderr, "unable to exec ");
 146             perror (postproc);
 147             _exit (1);
 148
 149         default:
 150             done (pidXwait(child_id, postproc));
 151     }
 152
 153     return 0;  /* dead code to satisfy the compiler */
 154 }
 155
 156 /* very similar to routine in replsbr.c */
 157
 158 static int outputlinelen = OUTPUTLINELEN;
 159
 160 static struct format *fmt;
 161
 162 static int dat[5];
 163
 164 static char *addrcomps[] = {
 165     "from",
 166     "sender",
 167     "reply-to",
 168     "to",
 169     "cc",
 170     "bcc",
 171     "resent-from",
 172     "resent-sender",
 173     "resent-reply-to",
 174     "resent-to",
 175     "resent-cc",
 176     "resent-bcc",
 177     NULL
 178 };
 179
 180
 181 static void
 182 rcvdistout (FILE *inb, char *form, char *addrs)
 183 {
 184     int char_read = 0, format_len, i, state;
 185     char **ap;
 186     char *cp, name[NAMESZ], tmpbuf[NMH_BUFSIZ];
 187     charstring_t scanl;
 188     struct comp *cptr;
 189     FILE *out;
 190     m_getfld_state_t gstate;
 191
 192     if (!(out = fopen (drft, "w")))
 193         adios (drft, "unable to create");
 194
 195     /* get new format string */
 196     cp = new_fs (form ? form : rcvdistcomps, NULL, NULL);
 197     format_len = strlen (cp);
 198     fmt_compile (cp, &fmt, 1);
 199
 200     for (ap = addrcomps; *ap; ap++) {
 201         cptr = fmt_findcomp (*ap);
 202         if (cptr)
 203             cptr->c_type |= CT_ADDR;
 204     }
 205
 206     cptr = fmt_findcomp ("addresses");
 207     if (cptr)
 208         cptr->c_text = addrs;
 209
 210     gstate = m_getfld_state_init(inb);
 211     for (;;) {
 212         int msg_count = sizeof tmpbuf;
 213         switch (state = m_getfld2(&gstate, name, tmpbuf, &msg_count)) {
 214             case FLD:
 215             case FLDPLUS:
 216                 i = fmt_addcomptext(name, tmpbuf);
 217                 if (i != -1) {
 218                     char_read += msg_count;
 219                     while (state == FLDPLUS) {
 220                         msg_count = sizeof tmpbuf;
 221                         state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 222                         fmt_appendcomp(i, name, tmpbuf);
 223                         char_read += msg_count;
 224                     }
 225                 }
 226
 227                 while (state == FLDPLUS) {
 228                     msg_count = sizeof tmpbuf;
 229                     state = m_getfld2(&gstate, name, tmpbuf, &msg_count);
 230                 }
 231                 break;
 232
 233             case LENERR:
 234             case FMTERR:
 235             case BODY:
 236             case FILEEOF:
 237                 goto finished;
 238
 239             default:
 240                 die("m_getfld2() returned %d", state);
 241         }
 242     }
 243 finished: ;
 244     m_getfld_state_destroy (&gstate);
 245
 246     i = format_len + char_read + 256;
 247     scanl = charstring_create (i + 2);
 248     dat[0] = dat[1] = dat[2] = dat[4] = 0;
 249     dat[3] = outputlinelen;
 250     fmt_scan (fmt, scanl, i, dat, NULL);
 251     fputs (charstring_buffer (scanl), out);
 252
 253     if (ferror (out))
 254         adios (drft, "error writing");
 255     fclose (out);
 256
 257     charstring_free (scanl);
 258     fmt_free(fmt, 1);
 259 }
 260
 261
 262 static void NORETURN
 263 unlink_done (int status)
 264 {
 265     if (backup[0])
 266         (void) m_unlink (backup);
 267     if (drft[0])
 268         (void) m_unlink (drft);
 269     if (tmpfil[0])
 270         (void) m_unlink (tmpfil);
 271
 272     exit (status ? RCV_MBX : RCV_MOK);
 273 }