cde/programs/dtksh/ksh93/src/lib/libcmd/tty.c

   1 /* $XConsortium: tty.c /main/3 1995/11/01 19:08:30 rswiston $ */
   2 /***************************************************************
   3 *                                                              *
   4 *                      AT&T - PROPRIETARY                      *
   5 *                                                              *
   6 *         THIS IS PROPRIETARY SOURCE CODE LICENSED BY          *
   7 *                          AT&T CORP.                          *
   8 *                                                              *
   9 *                Copyright (c) 1995 AT&T Corp.                 *
  10 *                     All Rights Reserved                      *
  11 *                                                              *
  12 *           This software is licensed by AT&T Corp.            *
  13 *       under the terms and conditions of the license in       *
  14 *       http://www.research.att.com/orgs/ssr/book/reuse        *
  15 *                                                              *
  16 *               This software was created by the               *
  17 *           Software Engineering Research Department           *
  18 *                    AT&T Bell Laboratories                    *
  19 *                                                              *
  20 *               For further information contact                *
  21 *                     gsf@research.att.com                     *
  22 *                                                              *
  23 ***************************************************************/
  24
  25 /* : : generated by proto : : */
  26
  27 #if !defined(__PROTO__)
  28 #if defined(__STDC__) || defined(__cplusplus) || defined(_proto) || defined(c_plusplus)
  29 #if defined(__cplusplus)
  30 #define __MANGLE__      "C"
  31 #else
  32 #define __MANGLE__
  33 #endif
  34 #define __STDARG__
  35 #define __PROTO__(x)    x
  36 #define __OTORP__(x)
  37 #define __PARAM__(n,o)  n
  38 #if !defined(__STDC__) && !defined(__cplusplus)
  39 #if !defined(c_plusplus)
  40 #define const
  41 #endif
  42 #define signed
  43 #define void            int
  44 #define volatile
  45 #define __V_            char
  46 #else
  47 #define __V_            void
  48 #endif
  49 #else
  50 #define __PROTO__(x)    ()
  51 #define __OTORP__(x)    x
  52 #define __PARAM__(n,o)  o
  53 #define __MANGLE__
  54 #define __V_            char
  55 #define const
  56 #define signed
  57 #define void            int
  58 #define volatile
  59 #endif
  60 #if defined(__cplusplus) || defined(c_plusplus)
  61 #define __VARARG__      ...
  62 #else
  63 #define __VARARG__
  64 #endif
  65 #if defined(__STDARG__)
  66 #define __VA_START__(p,a)       va_start(p,a)
  67 #else
  68 #define __VA_START__(p,a)       va_start(p)
  69 #endif
  70 #endif
  71 static const char id[] = "\n@(#)tty (AT&T Bell Laboratories) 04/01/92\0\n";
  72
  73 #include <cmdlib.h>
  74
  75 int
  76 b_tty __PARAM__((int argc, char *argv[]), (argc, argv)) __OTORP__(int argc; char *argv[];){
  77         register int n,sflag=0;
  78         register char *tty;
  79
  80         NoP(argc);
  81         NoP(id[0]);
  82         cmdinit(argv);
  83         while (n = optget(argv, "s ")) switch (n)
  84         {
  85         case 's':
  86                 sflag++;
  87                 break;
  88         case ':':
  89                 error(2, opt_info.arg);
  90                 break;
  91         case '?':
  92                 error(ERROR_usage(2), opt_info.arg);
  93                 break;
  94         }
  95         if(error_info.errors)
  96                 error(ERROR_usage(2),optusage(NiL));
  97         if(!(tty=ttyname(0)))
  98         {
  99                 tty = "not a tty";
 100                 error_info.errors++;
 101         }
 102         if(!sflag)
 103                 sfputr(sfstdout,tty,'\n');
 104         return(error_info.errors);
 105 }