support/nfs/nfssvc.c

   1 /*
   2  * support/nfs/nfssvc.c
   3  *
   4  * Run an NFS daemon.
   5  *
   6  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <config.h>
  11 #endif
  12
  13 #include <unistd.h>
  14 #include <fcntl.h>
  15
  16 #include "nfslib.h"
  17
  18 int
  19 nfssvc(int port, int nrservs)
  20 {
  21         struct nfsctl_arg       arg;
  22         int fd;
  23
  24         fd = open("/proc/fs/nfsd/threads", O_WRONLY);
  25         if (fd < 0)
  26                 fd = open("/proc/fs/nfs/threads", O_WRONLY);
  27         if (fd >= 0) {
  28                 /* 2.5+ kernel with nfsd filesystem mounted.
  29                  * Just write the number in.
  30                  * Cannot handle port number yet, but does anyone care?
  31                  */
  32                 char buf[20];
  33                 int n;
  34                 snprintf(buf, 20,"%d\n", nrservs);
  35                 n = write(fd, buf, strlen(buf));
  36                 close(fd);
  37                 if (n != strlen(buf))
  38                         return -1;
  39                 else
  40                         return 0;
  41         }
  42
  43         arg.ca_version = NFSCTL_VERSION;
  44         arg.ca_svc.svc_nthreads = nrservs;
  45         arg.ca_svc.svc_port = port;
  46         return nfsctl(NFSCTL_SVC, &arg, NULL);
  47 }