workbench/network/common/C/whoami.c

   1 /* $Id$
   2 /*
   3  * whoami.c ---
   4  *
   5  * Author: ppessi <Pekka.Pessi@hut.fi>
   6  *         Pavel Fedin <sonic_amiga@rambler.ru>
   7  *
   8  * Copyright © 1994 AmiTCP/IP Group, <amitcp-group@hut.fi>,
   9  *                  Helsinki University of Technology, Finland.
  10  *                  All rights reserved.
  11  * Copyright © 2005 Pavel Fedin
  12  *
  13  * Created      : Wed Jan 12 01:40:38 1994 ppessi
  14  * Last modified: Thu Sep 29 22:29:20 2005 sonic
  15  */
  16
  17 //#include "whoami_rev.h"
  18
  19 static const char version[] = "$VER: whoami 1.3 (29.09.2005)\n"
  20   "Copyright © 1994 AmiTCP/IP Group, <amitcp-group@hut.fi>\n"
  21   "Helsinki University of Technology, Finland.\n"
  22   "Copyright © 2005 Pavel Fedin\n";
  23
  24 /****** utilities/whoami ***************************************************
  25
  26    NAME
  27         whoami - prints effective current user id
  28
  29    VERSION
  30         $Id$
  31
  32    TEMPLATE
  33         whoami
  34
  35    FUNCTION
  36         Whoami prints your effective user id.  It works even if you are
  37         su'd.
  38
  39    RETURN VALUE
  40         Whoami return WARN, if the user id has got no user name associated.
  41
  42    SEE ALSO
  43         id
  44
  45 *****************************************************************************
  46 *
  47 */
  48
  49 #define USE_INLINE_STDARG
  50
  51 #include <exec/types.h>
  52 #include <exec/ports.h>
  53 #include <exec/semaphores.h>
  54 #include <exec/memory.h>
  55 #include <exec/execbase.h>
  56
  57 #include <dos/dos.h>
  58 #include <dos/dosextens.h>
  59
  60 #ifdef __SASC
  61 #include <clib/exec_protos.h>
  62 extern struct ExecBase* SysBase;
  63 #include <pragmas/exec_sysbase_pragmas.h>
  64 #else
  65 #include <proto/exec.h>
  66 #endif
  67 #include <proto/dos.h>
  68 #include <proto/usergroup.h>
  69 #include <libraries/usergroup.h>
  70
  71 #include <devices/sana2.h>
  72 #include <net/sana2errno.h>
  73 #include <string.h>
  74
  75 #define USERGROUPVERSION 1      /* minimum version to use */
  76
  77 #ifndef MAXLINELENGTH
  78 #define MAXLINELENGTH 1024
  79 #endif
  80
  81 #ifdef __MORPHOS__
  82 ULONG __abox__ = 1;
  83 #endif
  84
  85 LONG whoami(void)
  86 {
  87   LONG retval = 128;
  88   struct DosLibrary *DOSBase;
  89   struct ExecBase *SysBase;
  90
  91   SysBase = *(struct ExecBase**)4;
  92   DOSBase = (struct DosLibrary *)OpenLibrary("dos.library", 37L);
  93
  94   if (DOSBase) {
  95     struct Library *UserGroupBase =
  96       OpenLibrary("usergroup.library", USERGROUPVERSION);
  97
  98     if (UserGroupBase != NULL) {
  99       uid_t uid = geteuid();
 100       struct passwd *pw = getpwuid(uid);
 101
 102       if (pw != NULL) {
 103         Printf("%s\n", (ULONG)pw->pw_name);
 104         retval = RETURN_OK;
 105       } else {
 106         Printf("whoami: no login associated with uid %lu.\n", uid);
 107         retval = RETURN_WARN;
 108       }
 109
 110 //      CloseLibrary(UserGroupBase);
 111     } else {
 112       Printf("whoami: cannot open usergroup.library\n");
 113     }
 114
 115     CloseLibrary((struct Library *)DOSBase);
 116   }
 117
 118   return retval;
 119 }