posix/uname.c

   1 /* Copyright (C) 1991-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <string.h>
  20 #include <sys/utsname.h>
  21 #include <unistd.h>
  22
  23 /* This file is created by the configuration process, and defines UNAME_*.  */
  24 #include <config-name.h>
  25
  26 /* Put information about the system in NAME.  */
  27 int
  28 __uname (name)
  29      struct utsname *name;
  30 {
  31   int save;
  32
  33   if (name == NULL)
  34     {
  35       __set_errno (EINVAL);
  36       return -1;
  37     }
  38
  39   save = errno;
  40   if (__gethostname (name->nodename, sizeof (name->nodename)) < 0)
  41     {
  42       if (errno == ENOSYS)
  43         {
  44           /* Hostname is meaningless for this machine.  */
  45           name->nodename[0] = '\0';
  46           __set_errno (save);
  47         }
  48 #ifdef  ENAMETOOLONG
  49       else if (errno == ENAMETOOLONG)
  50         /* The name was truncated.  */
  51         __set_errno (save);
  52 #endif
  53       else
  54         return -1;
  55     }
  56   strncpy (name->sysname, UNAME_SYSNAME, sizeof (name->sysname));
  57   strncpy (name->release, UNAME_RELEASE, sizeof (name->release));
  58   strncpy (name->version, UNAME_VERSION, sizeof (name->version));
  59   strncpy (name->machine, UNAME_MACHINE, sizeof (name->machine));
  60
  61   return 0;
  62 }
  63 weak_alias (__uname, uname)
  64 libc_hidden_def (__uname)
  65 libc_hidden_def (uname)