1*b30d1939SAndy Fiddaman /***********************************************************************
2*b30d1939SAndy Fiddaman * *
3*b30d1939SAndy Fiddaman * This software is part of the ast package *
4*b30d1939SAndy Fiddaman * Copyright (c) 1992-2012 AT&T Intellectual Property *
5*b30d1939SAndy Fiddaman * and is licensed under the *
6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 *
7*b30d1939SAndy Fiddaman * by AT&T Intellectual Property *
8*b30d1939SAndy Fiddaman * *
9*b30d1939SAndy Fiddaman * A copy of the License is available at *
10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html *
11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12*b30d1939SAndy Fiddaman * *
13*b30d1939SAndy Fiddaman * Information and Software Systems Research *
14*b30d1939SAndy Fiddaman * AT&T Research *
15*b30d1939SAndy Fiddaman * Florham Park NJ *
16*b30d1939SAndy Fiddaman * *
17*b30d1939SAndy Fiddaman * Glenn Fowler <gsf@research.att.com> *
18*b30d1939SAndy Fiddaman * David Korn <dgk@research.att.com> *
19*b30d1939SAndy Fiddaman * *
20*b30d1939SAndy Fiddaman ***********************************************************************/
21*b30d1939SAndy Fiddaman #pragma prototyped
22*b30d1939SAndy Fiddaman /*
23*b30d1939SAndy Fiddaman * David Korn
24*b30d1939SAndy Fiddaman * AT&T Bell Laboratories
25*b30d1939SAndy Fiddaman *
26*b30d1939SAndy Fiddaman * tty
27*b30d1939SAndy Fiddaman */
28*b30d1939SAndy Fiddaman
29*b30d1939SAndy Fiddaman static const char usage[] =
30*b30d1939SAndy Fiddaman "[-?\n@(#)$Id: tty (AT&T Research) 2008-03-13 $\n]"
31*b30d1939SAndy Fiddaman USAGE_LICENSE
32*b30d1939SAndy Fiddaman "[+NAME?tty - write the name of the terminal to standard output]"
33*b30d1939SAndy Fiddaman "[+DESCRIPTION?\btty\b writes the name of the terminal that is connected "
34*b30d1939SAndy Fiddaman "to standard input onto standard output. If the standard input is not "
35*b30d1939SAndy Fiddaman "a terminal, \"\bnot a tty\b\" will be written to standard output.]"
36*b30d1939SAndy Fiddaman "[l:line-number?Write the synchronous line number of the terminal on a "
37*b30d1939SAndy Fiddaman "separate line following the terminal name line. If the standard "
38*b30d1939SAndy Fiddaman "input is not a synchronous terminal then "
39*b30d1939SAndy Fiddaman "\"\bnot on an active synchronous line\b\" is written.]"
40*b30d1939SAndy Fiddaman "[s:silent|quiet?Disable the terminal name line. Use \b[[ -t 0 ]]]]\b instead.]"
41*b30d1939SAndy Fiddaman "[+EXIT STATUS?]{"
42*b30d1939SAndy Fiddaman "[+0?Standard input is a tty.]"
43*b30d1939SAndy Fiddaman "[+1?Standard input is not a tty.]"
44*b30d1939SAndy Fiddaman "[+2?Invalid arguments.]"
45*b30d1939SAndy Fiddaman "[+3?A an error occurred.]"
46*b30d1939SAndy Fiddaman "}"
47*b30d1939SAndy Fiddaman ;
48*b30d1939SAndy Fiddaman
49*b30d1939SAndy Fiddaman
50*b30d1939SAndy Fiddaman #include <cmd.h>
51*b30d1939SAndy Fiddaman
52*b30d1939SAndy Fiddaman #if _mac_STWLINE
53*b30d1939SAndy Fiddaman #include <sys/stermio.h>
54*b30d1939SAndy Fiddaman #endif
55*b30d1939SAndy Fiddaman
56*b30d1939SAndy Fiddaman int
b_tty(int argc,char ** argv,Shbltin_t * context)57*b30d1939SAndy Fiddaman b_tty(int argc, char** argv, Shbltin_t* context)
58*b30d1939SAndy Fiddaman {
59*b30d1939SAndy Fiddaman register int sflag = 0;
60*b30d1939SAndy Fiddaman register int lflag = 0;
61*b30d1939SAndy Fiddaman register char* tty;
62*b30d1939SAndy Fiddaman #if _mac_STWLINE
63*b30d1939SAndy Fiddaman int n;
64*b30d1939SAndy Fiddaman #endif
65*b30d1939SAndy Fiddaman
66*b30d1939SAndy Fiddaman cmdinit(argc, argv, context, ERROR_CATALOG, 0);
67*b30d1939SAndy Fiddaman for (;;)
68*b30d1939SAndy Fiddaman {
69*b30d1939SAndy Fiddaman switch (optget(argv, usage))
70*b30d1939SAndy Fiddaman {
71*b30d1939SAndy Fiddaman case 'l':
72*b30d1939SAndy Fiddaman lflag++;
73*b30d1939SAndy Fiddaman continue;
74*b30d1939SAndy Fiddaman case 's':
75*b30d1939SAndy Fiddaman sflag++;
76*b30d1939SAndy Fiddaman continue;
77*b30d1939SAndy Fiddaman case ':':
78*b30d1939SAndy Fiddaman error(2, "%s", opt_info.arg);
79*b30d1939SAndy Fiddaman break;
80*b30d1939SAndy Fiddaman case '?':
81*b30d1939SAndy Fiddaman error(ERROR_usage(2), "%s", opt_info.arg);
82*b30d1939SAndy Fiddaman break;
83*b30d1939SAndy Fiddaman }
84*b30d1939SAndy Fiddaman break;
85*b30d1939SAndy Fiddaman }
86*b30d1939SAndy Fiddaman if(error_info.errors)
87*b30d1939SAndy Fiddaman error(ERROR_usage(2), "%s", optusage(NiL));
88*b30d1939SAndy Fiddaman if(!(tty=ttyname(0)))
89*b30d1939SAndy Fiddaman {
90*b30d1939SAndy Fiddaman tty = ERROR_translate(0, 0, 0, "not a tty");
91*b30d1939SAndy Fiddaman error_info.errors++;
92*b30d1939SAndy Fiddaman }
93*b30d1939SAndy Fiddaman if(!sflag)
94*b30d1939SAndy Fiddaman sfputr(sfstdout,tty,'\n');
95*b30d1939SAndy Fiddaman if(lflag)
96*b30d1939SAndy Fiddaman {
97*b30d1939SAndy Fiddaman #if _mac_STWLINE
98*b30d1939SAndy Fiddaman if ((n = ioctl(0, STWLINE, 0)) >= 0)
99*b30d1939SAndy Fiddaman error(ERROR_OUTPUT, 1, "synchronous line %d", n);
100*b30d1939SAndy Fiddaman else
101*b30d1939SAndy Fiddaman #endif
102*b30d1939SAndy Fiddaman error(ERROR_OUTPUT, 1, "not on an active synchronous line");
103*b30d1939SAndy Fiddaman }
104*b30d1939SAndy Fiddaman return(error_info.errors);
105*b30d1939SAndy Fiddaman }
106