sys/src/cmd/exportfs/exportfs.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <fcall.h>
   4 #define Extern
   5 #include "exportfs.h"
   6
   7 int     srvfd = -1;
   8 int     readonly;
   9
  10 void
  11 usage(void)
  12 {
  13         fprint(2, "usage: %s [-dsR] [-f dbgfile] [-m msize] [-r root] "
  14                 "[-S srvfile] [-P exclusion-file]\n", argv0);
  15         fatal("usage");
  16 }
  17
  18 void
  19 main(int argc, char **argv)
  20 {
  21         char *dbfile, *srv, *srvfdfile;
  22         int n;
  23
  24         dbfile = "/tmp/exportdb";
  25         srv = nil;
  26         srvfd = -1;
  27         srvfdfile = nil;
  28
  29         ARGBEGIN{
  30         case 'd':
  31                 dbg++;
  32                 break;
  33
  34         case 'f':
  35                 dbfile = EARGF(usage());
  36                 break;
  37
  38         case 'm':
  39                 messagesize = strtoul(EARGF(usage()), nil, 0);
  40                 break;
  41
  42         case 'r':
  43                 srv = EARGF(usage());
  44                 break;
  45
  46         case 's':
  47                 srv = "/";
  48                 break;
  49
  50         case 'F':
  51                 /* accepted but ignored, for backwards compatibility */
  52                 break;
  53
  54         case 'P':
  55                 patternfile = EARGF(usage());
  56                 break;
  57
  58         case 'R':
  59                 readonly = 1;
  60                 break;
  61
  62         case 'S':
  63                 if(srvfdfile != nil)
  64                         usage();
  65                 srvfdfile = EARGF(usage());
  66                 break;
  67
  68         default:
  69                 usage();
  70         }ARGEND
  71         USED(argc, argv);
  72
  73         if(srvfdfile != nil){
  74                 if(srv != nil){
  75                         fprint(2, "exportfs: -S cannot be used with -r or -s\n");
  76                         usage();
  77                 }
  78                 if((srvfd = open(srvfdfile, ORDWR)) < 0)
  79                         fatal("open %s: %r", srvfdfile);
  80         } else if(srv == nil)
  81                 usage();
  82
  83         exclusions();
  84
  85         if(dbg) {
  86                 n = create(dbfile, OWRITE|OTRUNC, 0666);
  87                 dup(n, DFD);
  88                 close(n);
  89         }
  90
  91         DEBUG(DFD, "exportfs: started\n");
  92
  93         rfork(RFNOTEG|RFREND);
  94
  95         if(messagesize == 0){
  96                 messagesize = iounit(0);
  97                 if(messagesize == 0)
  98                         messagesize = 8192+IOHDRSZ;
  99         }
 100         fhash = emallocz(sizeof(Fid*)*FHASHSIZE);
 101
 102         fmtinstall('F', fcallfmt);
 103
 104         if(srvfd == -1) {
 105                 if(chdir(srv) < 0) {
 106                         char ebuf[ERRMAX];
 107                         ebuf[0] = '\0';
 108                         errstr(ebuf, sizeof ebuf);
 109                         DEBUG(DFD, "chdir(\"%s\"): %s\n", srv, ebuf);
 110                         mounterror(ebuf);
 111                 }
 112                 DEBUG(DFD, "invoked as server for %s", srv);
 113         }
 114
 115         DEBUG(DFD, "\niniting root\n");
 116         initroot();
 117         io();
 118 }