14887Schin /*********************************************************************** 24887Schin * * 34887Schin * This software is part of the ast package * 4*8462SApril.Chin@Sun.COM * Copyright (c) 1992-2008 AT&T Intellectual Property * 54887Schin * and is licensed under the * 64887Schin * Common Public License, Version 1.0 * 7*8462SApril.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[] = 30*8462SApril.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 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'); 87*8462SApril.Chin@Sun.COM if(lflag) 88*8462SApril.Chin@Sun.COM { 894887Schin #if _mac_STWLINE 90*8462SApril.Chin@Sun.COM if (n = ioctl(0, STWLINE, 0)) >= 0) 91*8462SApril.Chin@Sun.COM error(ERROR_OUTPUT, 1, "synchronous line %d", n); 92*8462SApril.Chin@Sun.COM else 934887Schin #endif 94*8462SApril.Chin@Sun.COM error(ERROR_OUTPUT, 1, "not on an active synchronous line"); 95*8462SApril.Chin@Sun.COM } 964887Schin return(error_info.errors); 974887Schin } 98