14887Schin /***********************************************************************
24887Schin * *
34887Schin * This software is part of the ast package *
4*12068SRoger.Faulkner@Oracle.COM * Copyright (c) 1992-2010 AT&T Intellectual Property *
54887Schin * and is licensed under the *
64887Schin * Common Public License, Version 1.0 *
78462SApril.Chin@Sun.COM * by AT&T Intellectual Property *
84887Schin * *
94887Schin * A copy of the License is available at *
104887Schin * http://www.opensource.org/licenses/cpl1.0.txt *
114887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
124887Schin * *
134887Schin * Information and Software Systems Research *
144887Schin * AT&T Research *
154887Schin * Florham Park NJ *
164887Schin * *
174887Schin * Glenn Fowler <gsf@research.att.com> *
184887Schin * David Korn <dgk@research.att.com> *
194887Schin * *
204887Schin ***********************************************************************/
214887Schin #pragma prototyped
224887Schin /*
234887Schin * David Korn
244887Schin * AT&T Bell Laboratories
254887Schin *
264887Schin * tty
274887Schin */
284887Schin
294887Schin static const char usage[] =
308462SApril.Chin@Sun.COM "[-?\n@(#)$Id: tty (AT&T Research) 2008-03-13 $\n]"
314887Schin USAGE_LICENSE
324887Schin "[+NAME?tty - write the name of the terminal to standard output]"
334887Schin "[+DESCRIPTION?\btty\b writes the name of the terminal that is connected "
344887Schin "to standard input onto standard output. If the standard input is not "
354887Schin "a terminal, \"\bnot a tty\b\" will be written to standard output.]"
364887Schin "[l:line-number?Write the synchronous line number of the terminal on a "
374887Schin "separate line following the terminal name line. If the standard "
384887Schin "input is not a synchronous terminal then "
394887Schin "\"\bnot on an active synchronous line\b\" is written.]"
404887Schin "[s:silent|quiet?Disable the terminal name line. Use \b[[ -t 0 ]]]]\b instead.]"
414887Schin "[+EXIT STATUS?]{"
424887Schin "[+0?Standard input is a tty.]"
434887Schin "[+1?Standard input is not a tty.]"
444887Schin "[+2?Invalid arguments.]"
454887Schin "[+3?A an error occurred.]"
464887Schin "}"
474887Schin ;
484887Schin
494887Schin
504887Schin #include <cmd.h>
514887Schin
524887Schin #if _mac_STWLINE
534887Schin #include <sys/stermio.h>
544887Schin #endif
554887Schin
564887Schin int
b_tty(int argc,char * argv[],void * context)574887Schin b_tty(int argc, char *argv[], void* context)
584887Schin {
594887Schin register int n,sflag=0,lflag=0;
604887Schin register char *tty;
614887Schin
624887Schin cmdinit(argc, argv, context, ERROR_CATALOG, 0);
634887Schin while (n = optget(argv, usage)) switch (n)
644887Schin {
654887Schin case 'l':
664887Schin lflag++;
674887Schin break;
684887Schin case 's':
694887Schin sflag++;
704887Schin break;
714887Schin case ':':
724887Schin error(2, "%s", opt_info.arg);
734887Schin break;
744887Schin case '?':
754887Schin error(ERROR_usage(2), "%s", opt_info.arg);
764887Schin break;
774887Schin }
784887Schin if(error_info.errors)
794887Schin error(ERROR_usage(2), "%s", optusage(NiL));
804887Schin if(!(tty=ttyname(0)))
814887Schin {
824887Schin tty = ERROR_translate(0, 0, 0, "not a tty");
834887Schin error_info.errors++;
844887Schin }
854887Schin if(!sflag)
864887Schin sfputr(sfstdout,tty,'\n');
878462SApril.Chin@Sun.COM if(lflag)
888462SApril.Chin@Sun.COM {
894887Schin #if _mac_STWLINE
908462SApril.Chin@Sun.COM if (n = ioctl(0, STWLINE, 0)) >= 0)
918462SApril.Chin@Sun.COM error(ERROR_OUTPUT, 1, "synchronous line %d", n);
928462SApril.Chin@Sun.COM else
934887Schin #endif
948462SApril.Chin@Sun.COM error(ERROR_OUTPUT, 1, "not on an active synchronous line");
958462SApril.Chin@Sun.COM }
964887Schin return(error_info.errors);
974887Schin }
98