1da2e3ebdSchin /***********************************************************************
2da2e3ebdSchin * *
3da2e3ebdSchin * This software is part of the ast package *
4*3e14f97fSRoger A. Faulkner * Copyright (c) 1992-2010 AT&T Intellectual Property *
5da2e3ebdSchin * and is licensed under the *
6da2e3ebdSchin * Common Public License, Version 1.0 *
77c2fbfb3SApril Chin * by AT&T Intellectual Property *
8da2e3ebdSchin * *
9da2e3ebdSchin * A copy of the License is available at *
10da2e3ebdSchin * http://www.opensource.org/licenses/cpl1.0.txt *
11da2e3ebdSchin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
12da2e3ebdSchin * *
13da2e3ebdSchin * Information and Software Systems Research *
14da2e3ebdSchin * AT&T Research *
15da2e3ebdSchin * Florham Park NJ *
16da2e3ebdSchin * *
17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> *
18da2e3ebdSchin * David Korn <dgk@research.att.com> *
19da2e3ebdSchin * *
20da2e3ebdSchin ***********************************************************************/
21da2e3ebdSchin #pragma prototyped
22da2e3ebdSchin /*
23da2e3ebdSchin * David Korn
24da2e3ebdSchin * AT&T Bell Laboratories
25da2e3ebdSchin *
26da2e3ebdSchin * tty
27da2e3ebdSchin */
28da2e3ebdSchin
29da2e3ebdSchin static const char usage[] =
307c2fbfb3SApril Chin "[-?\n@(#)$Id: tty (AT&T Research) 2008-03-13 $\n]"
31da2e3ebdSchin USAGE_LICENSE
32da2e3ebdSchin "[+NAME?tty - write the name of the terminal to standard output]"
33da2e3ebdSchin "[+DESCRIPTION?\btty\b writes the name of the terminal that is connected "
34da2e3ebdSchin "to standard input onto standard output. If the standard input is not "
35da2e3ebdSchin "a terminal, \"\bnot a tty\b\" will be written to standard output.]"
36da2e3ebdSchin "[l:line-number?Write the synchronous line number of the terminal on a "
37da2e3ebdSchin "separate line following the terminal name line. If the standard "
38da2e3ebdSchin "input is not a synchronous terminal then "
39da2e3ebdSchin "\"\bnot on an active synchronous line\b\" is written.]"
40da2e3ebdSchin "[s:silent|quiet?Disable the terminal name line. Use \b[[ -t 0 ]]]]\b instead.]"
41da2e3ebdSchin "[+EXIT STATUS?]{"
42da2e3ebdSchin "[+0?Standard input is a tty.]"
43da2e3ebdSchin "[+1?Standard input is not a tty.]"
44da2e3ebdSchin "[+2?Invalid arguments.]"
45da2e3ebdSchin "[+3?A an error occurred.]"
46da2e3ebdSchin "}"
47da2e3ebdSchin ;
48da2e3ebdSchin
49da2e3ebdSchin
50da2e3ebdSchin #include <cmd.h>
51da2e3ebdSchin
52da2e3ebdSchin #if _mac_STWLINE
53da2e3ebdSchin #include <sys/stermio.h>
54da2e3ebdSchin #endif
55da2e3ebdSchin
56da2e3ebdSchin int
b_tty(int argc,char * argv[],void * context)57da2e3ebdSchin b_tty(int argc, char *argv[], void* context)
58da2e3ebdSchin {
59da2e3ebdSchin register int n,sflag=0,lflag=0;
60da2e3ebdSchin register char *tty;
61da2e3ebdSchin
62da2e3ebdSchin cmdinit(argc, argv, context, ERROR_CATALOG, 0);
63da2e3ebdSchin while (n = optget(argv, usage)) switch (n)
64da2e3ebdSchin {
65da2e3ebdSchin case 'l':
66da2e3ebdSchin lflag++;
67da2e3ebdSchin break;
68da2e3ebdSchin case 's':
69da2e3ebdSchin sflag++;
70da2e3ebdSchin break;
71da2e3ebdSchin case ':':
72da2e3ebdSchin error(2, "%s", opt_info.arg);
73da2e3ebdSchin break;
74da2e3ebdSchin case '?':
75da2e3ebdSchin error(ERROR_usage(2), "%s", opt_info.arg);
76da2e3ebdSchin break;
77da2e3ebdSchin }
78da2e3ebdSchin if(error_info.errors)
79da2e3ebdSchin error(ERROR_usage(2), "%s", optusage(NiL));
80da2e3ebdSchin if(!(tty=ttyname(0)))
81da2e3ebdSchin {
82da2e3ebdSchin tty = ERROR_translate(0, 0, 0, "not a tty");
83da2e3ebdSchin error_info.errors++;
84da2e3ebdSchin }
85da2e3ebdSchin if(!sflag)
86da2e3ebdSchin sfputr(sfstdout,tty,'\n');
877c2fbfb3SApril Chin if(lflag)
887c2fbfb3SApril Chin {
89da2e3ebdSchin #if _mac_STWLINE
907c2fbfb3SApril Chin if (n = ioctl(0, STWLINE, 0)) >= 0)
91da2e3ebdSchin error(ERROR_OUTPUT, 1, "synchronous line %d", n);
92da2e3ebdSchin else
93da2e3ebdSchin #endif
94da2e3ebdSchin error(ERROR_OUTPUT, 1, "not on an active synchronous line");
957c2fbfb3SApril Chin }
96da2e3ebdSchin return(error_info.errors);
97da2e3ebdSchin }
98