1  /* uname -- Report basic information about the system.  Generic version.
       2     Copyright (C) 1991-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <string.h>
      21  #include <sys/utsname.h>
      22  #include <unistd.h>
      23  
      24  /* This file defines UNAME_* to string constants.  */
      25  #include <uname-values.h>
      26  
      27  /* Put information about the system in NAME.  */
      28  int
      29  __uname (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)