arch/um/kernel/umid.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   4  */
   5
   6 #include <asm/errno.h>
   7 #include <init.h>
   8 #include <kern.h>
   9 #include <os.h>
  10
  11 /* Changed by set_umid_arg */
  12 static int umid_inited = 0;
  13
  14 static int __init set_umid_arg(char *name, int *add)
  15 {
  16         int err;
  17
  18         if (umid_inited) {
  19                 os_warn("umid already set\n");
  20                 return 0;
  21         }
  22
  23         *add = 0;
  24         err = set_umid(name);
  25         if (err == -EEXIST)
  26                 os_warn("umid '%s' already in use\n", name);
  27         else if (!err)
  28                 umid_inited = 1;
  29
  30         return 0;
  31 }
  32
  33 __uml_setup("umid=", set_umid_arg,
  34 "umid=<name>\n"
  35 "    This is used to assign a unique identity to this UML machine and\n"
  36 "    is used for naming the pid file and management console socket.\n\n"
  37 );
  38