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ncursesw-morphos/progs/tset.c
Thomas E. Dickey 4782c5a046 ncurses 6.3 - patch 20211204 
+ improve configure check for getttynam (report by Werner Fink).
2021-12-06 21:34:05 +00:00

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/****************************************************************************
* Copyright 2020,2021 Thomas E. Dickey *
* Copyright 1998-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996-on *
****************************************************************************/
/*
* Notes:
* The initial adaptation from 4.4BSD Lite sources in September 1995 used 686
* lines from that version, and made changes/additions for 150 lines. There
* was no reformatting, so with/without ignoring whitespace, the amount of
* change is the same.
*
* Comparing with current (2009) source, excluding this comment:
* a) 209 lines match identically to the 4.4BSD Lite sources, with 771 lines
* changed/added.
* a) Ignoring whitespace, the current version still uses 516 lines from the
* 4.4BSD Lite sources, with 402 lines changed/added.
*
* Raymond's original comment on this follows...
*/
/*
* tset.c - terminal initialization utility
*
* This code was mostly swiped from 4.4BSD tset, with some obsolescent
* cruft removed and substantial portions rewritten. A Regents of the
* University of California copyright applies to some portions of the
* code, and is reproduced below:
*/
/*-
* Copyright (c) 1980, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <reset_cmd.h>
#include <termcap.h>
#include <transform.h>
#include <tty_settings.h>
#if HAVE_GETTTYNAM
#include <ttyent.h>
#endif
#ifdef NeXT
char *ttyname(int fd);
#endif
MODULE_ID("$Id: tset.c,v 1.131 2021/12/04 23:02:13 tom Exp $")
#ifndef environ
extern char **environ;
#endif
const char *_nc_progname = "tset";
#define LOWERCASE(c) ((isalpha(UChar(c)) && isupper(UChar(c))) ? tolower(UChar(c)) : (c))
static GCC_NORETURN void exit_error(void);
static int
CaselessCmp(const char *a, const char *b)
{ /* strcasecmp isn't portable */
while (*a && *b) {
int cmp = LOWERCASE(*a) - LOWERCASE(*b);
if (cmp != 0)
break;
a++, b++;
}
return LOWERCASE(*a) - LOWERCASE(*b);
}
static GCC_NORETURN void
exit_error(void)
{
restore_tty_settings();
(void) fprintf(stderr, "\n");
fflush(stderr);
ExitProgram(EXIT_FAILURE);
/* NOTREACHED */
}
static GCC_NORETURN void
err(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void) fprintf(stderr, "%s: ", _nc_progname);
(void) vfprintf(stderr, fmt, ap);
va_end(ap);
exit_error();
/* NOTREACHED */
}
static GCC_NORETURN void
failed(const char *msg)
{
char temp[BUFSIZ];
size_t len = strlen(_nc_progname) + 2;
if ((int) len < (int) sizeof(temp) - 12) {
_nc_STRCPY(temp, _nc_progname, sizeof(temp));
_nc_STRCAT(temp, ": ", sizeof(temp));
} else {
_nc_STRCPY(temp, "tset: ", sizeof(temp));
}
_nc_STRNCAT(temp, msg, sizeof(temp), sizeof(temp) - strlen(temp) - 2);
perror(temp);
exit_error();
/* NOTREACHED */
}
/* Prompt the user for a terminal type. */
static const char *
askuser(const char *dflt)
{
static char answer[256];
/* We can get recalled; if so, don't continue uselessly. */
clearerr(stdin);
if (feof(stdin) || ferror(stdin)) {
(void) fprintf(stderr, "\n");
exit_error();
/* NOTREACHED */
}
for (;;) {
char *p;
if (dflt)
(void) fprintf(stderr, "Terminal type? [%s] ", dflt);
else
(void) fprintf(stderr, "Terminal type? ");
(void) fflush(stderr);
if (fgets(answer, sizeof(answer), stdin) == 0) {
if (dflt == 0) {
exit_error();
/* NOTREACHED */
}
return (dflt);
}
if ((p = strchr(answer, '\n')) != 0)
*p = '\0';
if (answer[0])
return (answer);
if (dflt != 0)
return (dflt);
}
}
/**************************************************************************
*
* Mapping logic begins here
*
**************************************************************************/
/* Baud rate conditionals for mapping. */
#define GT 0x01
#define EQ 0x02
#define LT 0x04
#define NOT 0x08
#define GE (GT | EQ)
#define LE (LT | EQ)
typedef struct map {
struct map *next; /* Linked list of maps. */
const char *porttype; /* Port type, or "" for any. */
const char *type; /* Terminal type to select. */
int conditional; /* Baud rate conditionals bitmask. */
int speed; /* Baud rate to compare against. */
} MAP;
static MAP *cur, *maplist;
#define DATA(name,value) { { name }, value }
typedef struct speeds {
const char string[8];
int speed;
} SPEEDS;
#if defined(EXP_WIN32_DRIVER)
static const SPEEDS speeds[] =
{
{"0", 0}
};
#else
static const SPEEDS speeds[] =
{
DATA("0", B0),
DATA("50", B50),
DATA("75", B75),
DATA("110", B110),
DATA("134", B134),
DATA("134.5", B134),
DATA("150", B150),
DATA("200", B200),
DATA("300", B300),
DATA("600", B600),
DATA("1200", B1200),
DATA("1800", B1800),
DATA("2400", B2400),
DATA("4800", B4800),
DATA("9600", B9600),
/* sgttyb may define up to this point */
#ifdef B19200
DATA("19200", B19200),
#endif
#ifdef B38400
DATA("38400", B38400),
#endif
#ifdef B19200
DATA("19200", B19200),
#endif
#ifdef B38400
DATA("38400", B38400),
#endif
#ifdef B19200
DATA("19200", B19200),
#else
#ifdef EXTA
DATA("19200", EXTA),
#endif
#endif
#ifdef B38400
DATA("38400", B38400),
#else
#ifdef EXTB
DATA("38400", EXTB),
#endif
#endif
#ifdef B57600
DATA("57600", B57600),
#endif
#ifdef B76800
DATA("76800", B57600),
#endif
#ifdef B115200
DATA("115200", B115200),
#endif
#ifdef B153600
DATA("153600", B153600),
#endif
#ifdef B230400
DATA("230400", B230400),
#endif
#ifdef B307200
DATA("307200", B307200),
#endif
#ifdef B460800
DATA("460800", B460800),
#endif
#ifdef B500000
DATA("500000", B500000),
#endif
#ifdef B576000
DATA("576000", B576000),
#endif
#ifdef B921600
DATA("921600", B921600),
#endif
#ifdef B1000000
DATA("1000000", B1000000),
#endif
#ifdef B1152000
DATA("1152000", B1152000),
#endif
#ifdef B1500000
DATA("1500000", B1500000),
#endif
#ifdef B2000000
DATA("2000000", B2000000),
#endif
#ifdef B2500000
DATA("2500000", B2500000),
#endif
#ifdef B3000000
DATA("3000000", B3000000),
#endif
#ifdef B3500000
DATA("3500000", B3500000),
#endif
#ifdef B4000000
DATA("4000000", B4000000),
#endif
};
#undef DATA
#endif
static int
tbaudrate(char *rate)
{
const SPEEDS *sp = 0;
size_t n;
/* The baudrate number can be preceded by a 'B', which is ignored. */
if (*rate == 'B')
++rate;
for (n = 0; n < SIZEOF(speeds); ++n) {
if (n > 0 && (speeds[n].speed <= speeds[n - 1].speed)) {
/* if the speeds are not increasing, likely a numeric overflow */
break;
}
if (!CaselessCmp(rate, speeds[n].string)) {
sp = speeds + n;
break;
}
}
if (sp == 0)
err("unknown baud rate %s", rate);
return (sp->speed);
}
/*
* Syntax for -m:
* [port-type][test baudrate]:terminal-type
* The baud rate tests are: >, <, @, =, !
*/
static void
add_mapping(const char *port, char *arg)
{
MAP *mapp;
char *copy, *p;
const char *termp;
char *base = 0;
copy = strdup(arg);
mapp = typeMalloc(MAP, 1);
if (copy == 0 || mapp == 0)
failed("malloc");
assert(copy != 0);
assert(mapp != 0);
mapp->next = 0;
if (maplist == 0)
cur = maplist = mapp;
else {
cur->next = mapp;
cur = mapp;
}
mapp->porttype = arg;
mapp->conditional = 0;
arg = strpbrk(arg, "><@=!:");
if (arg == 0) { /* [?]term */
mapp->type = mapp->porttype;
mapp->porttype = 0;
goto done;
}
if (arg == mapp->porttype) /* [><@=! baud]:term */
termp = mapp->porttype = 0;
else
termp = base = arg;
for (;; ++arg) { /* Optional conditionals. */
switch (*arg) {
case '<':
if (mapp->conditional & GT)
goto badmopt;
mapp->conditional |= LT;
break;
case '>':
if (mapp->conditional & LT)
goto badmopt;
mapp->conditional |= GT;
break;
case '@':
case '=': /* Not documented. */
mapp->conditional |= EQ;
break;
case '!':
mapp->conditional |= NOT;
break;
default:
goto next;
}
}
next:
if (*arg == ':') {
if (mapp->conditional)
goto badmopt;
++arg;
} else { /* Optional baudrate. */
arg = strchr(p = arg, ':');
if (arg == 0)
goto badmopt;
*arg++ = '\0';
mapp->speed = tbaudrate(p);
}
mapp->type = arg;
/* Terminate porttype, if specified. */
if (termp != 0)
*base = '\0';
/* If a NOT conditional, reverse the test. */
if (mapp->conditional & NOT)
mapp->conditional = ~mapp->conditional & (EQ | GT | LT);
/* If user specified a port with an option flag, set it. */
done:
if (port) {
if (mapp->porttype) {
badmopt:
err("illegal -m option format: %s", copy);
}
mapp->porttype = port;
}
free(copy);
#ifdef MAPDEBUG
(void) printf("port: %s\n", mapp->porttype ? mapp->porttype : "ANY");
(void) printf("type: %s\n", mapp->type);
(void) printf("conditional: ");
p = "";
if (mapp->conditional & GT) {
(void) printf("GT");
p = "/";
}
if (mapp->conditional & EQ) {
(void) printf("%sEQ", p);
p = "/";
}
if (mapp->conditional & LT)
(void) printf("%sLT", p);
(void) printf("\nspeed: %d\n", mapp->speed);
#endif
}
/*
* Return the type of terminal to use for a port of type 'type', as specified
* by the first applicable mapping in 'map'. If no mappings apply, return
* 'type'.
*/
static const char *
mapped(const char *type)
{
MAP *mapp;
int match;
for (mapp = maplist; mapp; mapp = mapp->next)
if (mapp->porttype == 0 || !strcmp(mapp->porttype, type)) {
switch (mapp->conditional) {
case 0: /* No test specified. */
match = TRUE;
break;
case EQ:
match = ((int) ospeed == mapp->speed);
break;
case GE:
match = ((int) ospeed >= mapp->speed);
break;
case GT:
match = ((int) ospeed > mapp->speed);
break;
case LE:
match = ((int) ospeed <= mapp->speed);
break;
case LT:
match = ((int) ospeed < mapp->speed);
break;
default:
match = FALSE;
}
if (match)
return (mapp->type);
}
/* No match found; return given type. */
return (type);
}
/**************************************************************************
*
* Entry fetching
*
**************************************************************************/
/*
* Figure out what kind of terminal we're dealing with, and then read in
* its termcap entry.
*/
static const char *
get_termcap_entry(int fd, char *userarg)
{
int errret;
char *p;
const char *ttype;
#if HAVE_PATH_TTYS
#if HAVE_GETTTYNAM
struct ttyent *t;
#else
FILE *fp;
#endif
char *ttypath;
#endif /* HAVE_PATH_TTYS */
(void) fd;
if (userarg) {
ttype = userarg;
goto found;
}
/* Try the environment. */
if ((ttype = getenv("TERM")) != 0)
goto map;
#if HAVE_PATH_TTYS
if ((ttypath = ttyname(fd)) != 0) {
p = _nc_basename(ttypath);
#if HAVE_GETTTYNAM
/*
* We have the 4.3BSD library call getttynam(3); that means
* there's an /etc/ttys to look up device-to-type mappings in.
* Try ttyname(3); check for dialup or other mapping.
*/
if ((t = getttynam(p))) {
ttype = t->ty_type;
goto map;
}
#else
if ((fp = fopen("/etc/ttytype", "r")) != 0
|| (fp = fopen("/etc/ttys", "r")) != 0) {
char buffer[BUFSIZ];
char *s, *t, *d;
while (fgets(buffer, sizeof(buffer) - 1, fp) != 0) {
for (s = buffer, t = d = 0; *s; s++) {
if (isspace(UChar(*s)))
*s = '\0';
else if (t == 0)
t = s;
else if (d == 0 && s != buffer && s[-1] == '\0')
d = s;
}
if (t != 0 && d != 0 && !strcmp(d, p)) {
ttype = strdup(t);
fclose(fp);
goto map;
}
}
fclose(fp);
}
#endif /* HAVE_GETTTYNAM */
}
#endif /* HAVE_PATH_TTYS */
/* If still undefined, use "unknown". */
ttype = "unknown";
map:ttype = mapped(ttype);
/*
* If not a path, remove TERMCAP from the environment so we get a
* real entry from /etc/termcap. This prevents us from being fooled
* by out of date stuff in the environment.
*/
found:
if ((p = getenv("TERMCAP")) != 0 && !_nc_is_abs_path(p)) {
/* 'unsetenv("TERMCAP")' is not portable.
* The 'environ' array is better.
*/
int n;
for (n = 0; environ[n] != 0; n++) {
if (!strncmp("TERMCAP=", environ[n], (size_t) 8)) {
while ((environ[n] = environ[n + 1]) != 0) {
n++;
}
break;
}
}
}
/*
* ttype now contains a pointer to the type of the terminal.
* If the first character is '?', ask the user.
*/
if (ttype[0] == '?') {
if (ttype[1] != '\0')
ttype = askuser(ttype + 1);
else
ttype = askuser(0);
}
/* Find the terminfo entry. If it doesn't exist, ask the user. */
while (setupterm((NCURSES_CONST char *) ttype, fd, &errret)
!= OK) {
if (errret == 0) {
(void) fprintf(stderr, "%s: unknown terminal type %s\n",
_nc_progname, ttype);
ttype = 0;
} else {
(void) fprintf(stderr,
"%s: can't initialize terminal type %s (error %d)\n",
_nc_progname, ttype, errret);
ttype = 0;
}
ttype = askuser(ttype);
}
#if BROKEN_LINKER
tgetflag("am"); /* force lib_termcap.o to be linked for 'ospeed' */
#endif
return (ttype);
}
/**************************************************************************
*
* Main sequence
*
**************************************************************************/
/*
* Convert the obsolete argument forms into something that getopt can handle.
* This means that -e, -i and -k get default arguments supplied for them.
*/
static void
obsolete(char **argv)
{
for (; *argv; ++argv) {
char *parm = argv[0];
if (parm[0] == '-' && parm[1] == '\0') {
argv[0] = strdup("-q");
continue;
}
if ((parm[0] != '-')
|| (argv[1] && argv[1][0] != '-')
|| (parm[1] != 'e' && parm[1] != 'i' && parm[1] != 'k')
|| (parm[2] != '\0'))
continue;
switch (argv[0][1]) {
case 'e':
argv[0] = strdup("-e^H");
break;
case 'i':
argv[0] = strdup("-i^C");
break;
case 'k':
argv[0] = strdup("-k^U");
break;
}
}
}
static void
print_shell_commands(const char *ttype)
{
const char *p;
int len;
char *var;
char *leaf;
/*
* Figure out what shell we're using. A hack, we look for an
* environmental variable SHELL ending in "csh".
*/
if ((var = getenv("SHELL")) != 0
&& ((len = (int) strlen(leaf = _nc_basename(var))) >= 3)
&& !strcmp(leaf + len - 3, "csh"))
p = "set noglob;\nsetenv TERM %s;\nunset noglob;\n";
else
p = "TERM=%s;\n";
(void) printf(p, ttype);
}
static void
usage(void)
{
#define SKIP(s) /* nothing */
#define KEEP(s) s "\n"
static const char msg[] =
{
KEEP("")
KEEP("Options:")
SKIP(" -a arpanet (obsolete)")
KEEP(" -c set control characters")
SKIP(" -d dialup (obsolete)")
KEEP(" -e ch erase character")
KEEP(" -I no initialization strings")
KEEP(" -i ch interrupt character")
KEEP(" -k ch kill character")
KEEP(" -m mapping map identifier to type")
SKIP(" -p plugboard (obsolete)")
KEEP(" -Q do not output control key settings")
KEEP(" -q display term only, do no changes")
KEEP(" -r display term on stderr")
SKIP(" -S (obsolete)")
KEEP(" -s output TERM set command")
KEEP(" -V print curses-version")
KEEP(" -w set window-size")
KEEP("")
KEEP("If neither -c/-w are given, both are assumed.")
};
#undef KEEP
#undef SKIP
(void) fprintf(stderr, "Usage: %s [options] [terminal]\n", _nc_progname);
fputs(msg, stderr);
ExitProgram(EXIT_FAILURE);
/* NOTREACHED */
}
static char
arg_to_char(void)
{
return (char) ((optarg[0] == '^' && optarg[1] != '\0')
? ((optarg[1] == '?') ? '\177' : CTRL(optarg[1]))
: optarg[0]);
}
int
main(int argc, char **argv)
{
int ch, noinit, noset, quiet, Sflag, sflag, showterm;
const char *ttype;
int terasechar = -1; /* new erase character */
int intrchar = -1; /* new interrupt character */
int tkillchar = -1; /* new kill character */
int my_fd;
bool opt_c = FALSE; /* set control-chars */
bool opt_w = FALSE; /* set window-size */
TTY mode, oldmode;
_nc_progname = _nc_rootname(*argv);
obsolete(argv);
noinit = noset = quiet = Sflag = sflag = showterm = 0;
while ((ch = getopt(argc, argv, "a:cd:e:Ii:k:m:p:qQrSsVw")) != -1) {
switch (ch) {
case 'c': /* set control-chars */
opt_c = TRUE;
break;
case 'a': /* OBSOLETE: map identifier to type */
add_mapping("arpanet", optarg);
break;
case 'd': /* OBSOLETE: map identifier to type */
add_mapping("dialup", optarg);
break;
case 'e': /* erase character */
terasechar = arg_to_char();
break;
case 'I': /* no initialization strings */
noinit = 1;
break;
case 'i': /* interrupt character */
intrchar = arg_to_char();
break;
case 'k': /* kill character */
tkillchar = arg_to_char();
break;
case 'm': /* map identifier to type */
add_mapping(0, optarg);
break;
case 'p': /* OBSOLETE: map identifier to type */
add_mapping("plugboard", optarg);
break;
case 'Q': /* don't output control key settings */
quiet = 1;
break;
case 'q': /* display term only */
noset = 1;
break;
case 'r': /* display term on stderr */
showterm = 1;
break;
case 'S': /* OBSOLETE: output TERM & TERMCAP */
Sflag = 1;
break;
case 's': /* output TERM set command */
sflag = 1;
break;
case 'V': /* print curses-version */
puts(curses_version());
ExitProgram(EXIT_SUCCESS);
case 'w': /* set window-size */
opt_w = TRUE;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc > 1)
usage();
if (!opt_c && !opt_w)
opt_c = opt_w = TRUE;
my_fd = save_tty_settings(&mode, TRUE);
oldmode = mode;
#ifdef TERMIOS
ospeed = (NCURSES_OSPEED) cfgetospeed(&mode);
#elif defined(EXP_WIN32_DRIVER)
ospeed = 0;
#else
ospeed = (NCURSES_OSPEED) mode.sg_ospeed;
#endif
if (same_program(_nc_progname, PROG_RESET)) {
reset_start(stderr, TRUE, FALSE);
reset_tty_settings(my_fd, &mode, noset);
} else {
reset_start(stderr, FALSE, TRUE);
}
ttype = get_termcap_entry(my_fd, *argv);
if (!noset) {
#if HAVE_SIZECHANGE
if (opt_w) {
set_window_size(my_fd, &lines, &columns);
}
#endif
if (opt_c) {
set_control_chars(&mode, terasechar, intrchar, tkillchar);
set_conversions(&mode);
if (!noinit) {
if (send_init_strings(my_fd, &oldmode)) {
(void) putc('\r', stderr);
(void) fflush(stderr);
(void) napms(1000); /* Settle the terminal. */
}
}
update_tty_settings(&oldmode, &mode);
}
}
if (noset) {
(void) printf("%s\n", ttype);
} else {
if (showterm)
(void) fprintf(stderr, "Terminal type is %s.\n", ttype);
/*
* If erase, kill and interrupt characters could have been
* modified and not -Q, display the changes.
*/
if (!quiet) {
print_tty_chars(&oldmode, &mode);
}
}
if (Sflag)
err("The -S option is not supported under terminfo.");
if (sflag) {
print_shell_commands(ttype);
}
ExitProgram(EXIT_SUCCESS);
}
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