pith/osdep/hostname.c

   1 #if !defined(lint) && !defined(DOS)
   2 static char rcsid[] = "$Id: hostname.c 1176 2008-09-29 21:16:42Z hubert@u.washington.edu $";
   3 #endif
   4
   5 /*
   6  * ========================================================================
   7  * Copyright 2008 University of Washington
   8  *
   9  * Licensed under the Apache License, Version 2.0 (the "License");
  10  * you may not use this file except in compliance with the License.
  11  * You may obtain a copy of the License at
  12  *
  13  *     http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * ========================================================================
  16  */
  17
  18 #include <system.h>
  19
  20 #if     HAVE_GETHOSTNAME
  21
  22 #elif   HAVE_UNAME
  23
  24 #include <sys/utsname.h>
  25
  26 #elif   defined(SYSTEMID)
  27
  28 #elif   defined(XENIX)
  29
  30 #endif
  31
  32 #include "hostname.h"
  33
  34
  35
  36 /*----------------------------------------------------------------------
  37        Call system gethostname
  38
  39   Args: hostname -- buffer to return host name in
  40         size     -- Size of buffer hostname is to be returned in
  41
  42  Result: returns 0 if the hostname is correctly set,
  43          -1 if not (and errno is set).
  44  ----*/
  45 int
  46 hostname(char *hostname, int size)
  47 {
  48 #if     HAVE_GETHOSTNAME
  49
  50     if (gethostname(hostname, size))
  51       return -1;
  52
  53     /* sanity check of hostname string */
  54     for (*dn = hname; (*dn > 0x20) && (*dn < 0x7f); ++dn)
  55       ;
  56
  57     if (*dn)            /* non-ascii in hostname */
  58       strncpy(hostname, "unknown", size-1);
  59
  60     hostname[size - 1] = '\0';
  61     return 0;
  62
  63 #elif   HAVE_UNAME
  64
  65     /** This routine compliments of Scott McGregor at the HP
  66             Corporate Computing Center **/
  67
  68     int uname(struct utsname *);
  69     struct utsname name;
  70
  71     (void)uname(&name);
  72     (void)strncpy(hostname,name.nodename,size-1);
  73
  74     hostname[size - 1] = '\0';
  75     return 0;
  76
  77 #elif   defined(SYSTEMID)
  78         char    buf[32];
  79         FILE    *fp;
  80         char    *p;
  81
  82         if ((fp = our_fopen("/etc/systemid", "rb")) != 0) {
  83           fgets(buf, sizeof(buf) - 1, fp);
  84           fclose(fp);
  85           if ((p = strindex(buf, '\n')) != NULL)
  86             *p = '\0';
  87           (void) strncpy(hostname, buf, size - 1);
  88           hostname[size - 1] = '\0';
  89           return 0;
  90         }
  91
  92 #elif   defined(XENIX)
  93
  94 #ifdef DOUNAME
  95         /** This routine compliments of Scott McGregor at the HP
  96             Corporate Computing Center **/
  97
  98         int uname();
  99         struct utsname name;
 100
 101         (void) uname(&name);
 102         (void) strncpy(hostname,name.nodename,size-1);
 103 #else
 104         (void) strncpy(hostname, HOSTNAME, size-1);
 105 #endif  /* DOUNAME */
 106
 107         hostname[size - 1] = '\0';
 108         return 0;
 109 #else
 110         /* We shouldn't get here except for the windows
 111          * case, which currently doesn't use this (as
 112          * it appears nothing else does as well)
 113          */
 114         return -1;
 115
 116 #endif
 117 }
 118
 119