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