uefi/linaro-edk2/StdLib/BsdSocketLib/sethostname.c

/*
 * Copyright (c) 1999, 2000
 * Intel Corporation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. All advertising materials mentioning features or use of this software must
 *    display the following acknowledgement:
 *
 *    This product includes software developed by Intel Corporation and its
 *    contributors.
 *
 * 4. Neither the name of Intel Corporation or its contributors may be used to
 *    endorse or promote products derived from this software without specific
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 *
 * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 */

#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <Uefi.h>
#include <unistd.h>
#include <wchar.h>

/*++

Module Name:

    sethostname.c

Abstract:

    Map FreeBSD sethostname call to EFI Interface


Revision History

--*/

int
sethostname(
  const char * name,
  size_t namelen
  )
/*++

Routine Description:

    Set the hostname for this system.

Arguments:

  name    - Pointer to hostname.
  namelen   - Length of name

Returns:

  0 on success, -1 if not set

--*/
{
  int SetStatus;
  char * pName;

  //
  //  Allocate a new buffer for name since the input value
  //  does not need to be zero terminated
  //
  pName = malloc ( namelen + 1 );
  if ( NULL == pName ) {
    errno = ENOMEM;
    SetStatus = -1;
  }
  else {
    //
    //  Create a zero terminated string for name
    //
    memcpy ( pName, name, namelen );
    pName[ namelen ] = 0;
  
    //
    //  Set the environment variable
    //
    SetStatus = setenv ("HOSTNAME", pName, TRUE);

    //
    //  Free the temporary buffer
    //
    free ( pName );
  }

  //
  //  Return the results
  //
  return SetStatus;
}