StdLib/BsdSocketLib/gethostname.c

   1 /*
   2  * Copyright (c) 1999, 2000
   3  * Intel Corporation.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without modification,
   7  * are permitted provided that the following conditions are met:
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   9  * 1. Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright notice,
  13  *    this list of conditions and the following disclaimer in the documentation
  14  *    and/or other materials provided with the distribution.
  15  *
  16  * 3. All advertising materials mentioning features or use of this software must
  17  *    display the following acknowledgement:
  18  *
  19  *    This product includes software developed by Intel Corporation and its
  20  *    contributors.
  21  *
  22  * 4. Neither the name of Intel Corporation or its contributors may be used to
  23  *    endorse or promote products derived from this software without specific
  24  *    prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  28  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  29  * DISCLAIMED.  IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR
  30  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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  37  */
  38
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 /*++
  44
  45 Module Name:
  46
  47     gethostname.c
  48
  49 Abstract:
  50
  51     Map FreeBSD gethostname call to EFI Interface
  52
  53
  54 Revision History
  55
  56 --*/
  57
  58 int
  59 gethostname(
  60         char    *name,
  61         size_t          namelen
  62         )
  63 /*++
  64
  65 Routine Description:
  66
  67     Get the hostname for this system.
  68
  69 Arguments:
  70
  71         name            - Pointer to storage for hostname.
  72         namelen         - Length of name
  73
  74 Returns:
  75
  76         0 on success, -1 if not set
  77
  78 --*/
  79 {
  80         char    *pHost;
  81
  82         pHost = getenv ("HOSTNAME");
  83
  84         if ( pHost == NULL ) {
  85                 *name = 0;
  86         } else {
  87                 strncpy (name, pHost, namelen);
  88                 name[namelen-1] = 0;
  89         }
  90
  91         return (0);
  92 }