/* stty -- change and print terminal line settings
Copyright (C) 1990-2016 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see . */
/* Usage: stty [-ag] [--all] [--save] [-F device] [--file=device] [setting...]
Options:
-a, --all Write all current settings to stdout in human-readable form.
-g, --save Write all current settings to stdout in stty-readable form.
-F, --file Open and use the specified device instead of stdin
If no args are given, write to stdout the baud rate and settings that
have been changed from their defaults. Mode reading and changes
are done on the specified device, or stdin if none was specified.
David MacKenzie */
#include
#ifdef TERMIOS_NEEDS_XOPEN_SOURCE
# define _XOPEN_SOURCE
#endif
#include
#include
#include
#if HAVE_STROPTS_H
# include
#endif
#include
#ifdef WINSIZE_IN_PTEM
# include
# include
#endif
#ifdef GWINSZ_IN_SYS_PTY
# include
# include
#endif
#include
#include
#include
#include "system.h"
#include "error.h"
#include "fd-reopen.h"
#include "quote.h"
#include "xdectoint.h"
#include "xstrtol.h"
/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "stty"
#define AUTHORS proper_name ("David MacKenzie")
#ifndef _POSIX_VDISABLE
# define _POSIX_VDISABLE 0
#endif
#define Control(c) ((c) & 0x1f)
/* Canonical values for control characters. */
#ifndef CINTR
# define CINTR Control ('c')
#endif
#ifndef CQUIT
# define CQUIT 28
#endif
#ifndef CERASE
# define CERASE 127
#endif
#ifndef CKILL
# define CKILL Control ('u')
#endif
#ifndef CEOF
# define CEOF Control ('d')
#endif
#ifndef CEOL
# define CEOL _POSIX_VDISABLE
#endif
#ifndef CSTART
# define CSTART Control ('q')
#endif
#ifndef CSTOP
# define CSTOP Control ('s')
#endif
#ifndef CSUSP
# define CSUSP Control ('z')
#endif
#if defined VEOL2 && !defined CEOL2
# define CEOL2 _POSIX_VDISABLE
#endif
/* Some platforms have VSWTC, others VSWTCH. In both cases, this control
character is initialized by CSWTCH, if present. */
#if defined VSWTC && !defined VSWTCH
# define VSWTCH VSWTC
#endif
/* ISC renamed swtch to susp for termios, but we'll accept either name. */
#if defined VSUSP && !defined VSWTCH
# define VSWTCH VSUSP
# if defined CSUSP && !defined CSWTCH
# define CSWTCH CSUSP
# endif
#endif
#if defined VSWTCH && !defined CSWTCH
# define CSWTCH _POSIX_VDISABLE
#endif
/* SunOS >= 5.3 loses (^Z doesn't work) if 'swtch' is the same as 'susp'.
So the default is to disable 'swtch.' */
#if defined __sun
# undef CSWTCH
# define CSWTCH _POSIX_VDISABLE
#endif
#if defined VWERSE && !defined VWERASE /* AIX-3.2.5 */
# define VWERASE VWERSE
#endif
#if defined VDSUSP && !defined CDSUSP
# define CDSUSP Control ('y')
#endif
#if !defined VREPRINT && defined VRPRNT /* Irix 4.0.5 */
# define VREPRINT VRPRNT
#endif
#if defined VREPRINT && !defined CRPRNT
# define CRPRNT Control ('r')
#endif
#if defined CREPRINT && !defined CRPRNT
# define CRPRNT Control ('r')
#endif
#if defined VWERASE && !defined CWERASE
# define CWERASE Control ('w')
#endif
#if defined VLNEXT && !defined CLNEXT
# define CLNEXT Control ('v')
#endif
#if defined VDISCARD && !defined VFLUSHO
# define VFLUSHO VDISCARD
#endif
#if defined VFLUSH && !defined VFLUSHO /* Ultrix 4.2 */
# define VFLUSHO VFLUSH
#endif
#if defined CTLECH && !defined ECHOCTL /* Ultrix 4.3 */
# define ECHOCTL CTLECH
#endif
#if defined TCTLECH && !defined ECHOCTL /* Ultrix 4.2 */
# define ECHOCTL TCTLECH
#endif
#if defined CRTKIL && !defined ECHOKE /* Ultrix 4.2 and 4.3 */
# define ECHOKE CRTKIL
#endif
#if defined VFLUSHO && !defined CFLUSHO
# define CFLUSHO Control ('o')
#endif
#if defined VSTATUS && !defined CSTATUS
# define CSTATUS Control ('t')
#endif
/* Which speeds to set. */
enum speed_setting
{
input_speed, output_speed, both_speeds
};
/* What to output and how. */
enum output_type
{
changed, all, recoverable /* Default, -a, -g. */
};
/* Which member(s) of 'struct termios' a mode uses. */
enum mode_type
{
control, input, output, local, combination
};
/* Flags for 'struct mode_info'. */
#define SANE_SET 1 /* Set in 'sane' mode. */
#define SANE_UNSET 2 /* Unset in 'sane' mode. */
#define REV 4 /* Can be turned off by prepending '-'. */
#define OMIT 8 /* Don't display value. */
#define NO_SETATTR 16 /* tcsetattr not used to set mode bits. */
/* Each mode. */
struct mode_info
{
const char *name; /* Name given on command line. */
enum mode_type type; /* Which structure element to change. */
char flags; /* Setting and display options. */
unsigned long bits; /* Bits to set for this mode. */
unsigned long mask; /* Other bits to turn off for this mode. */
};
static struct mode_info const mode_info[] =
{
{"parenb", control, REV, PARENB, 0},
{"parodd", control, REV, PARODD, 0},
#ifdef CMSPAR
{"cmspar", control, REV, CMSPAR, 0},
#endif
{"cs5", control, 0, CS5, CSIZE},
{"cs6", control, 0, CS6, CSIZE},
{"cs7", control, 0, CS7, CSIZE},
{"cs8", control, 0, CS8, CSIZE},
{"hupcl", control, REV, HUPCL, 0},
{"hup", control, REV | OMIT, HUPCL, 0},
{"cstopb", control, REV, CSTOPB, 0},
{"cread", control, SANE_SET | REV, CREAD, 0},
{"clocal", control, REV, CLOCAL, 0},
#ifdef CRTSCTS
{"crtscts", control, REV, CRTSCTS, 0},
#endif
#ifdef CDTRDSR
{"cdtrdsr", control, REV, CDTRDSR, 0},
#endif
{"ignbrk", input, SANE_UNSET | REV, IGNBRK, 0},
{"brkint", input, SANE_SET | REV, BRKINT, 0},
{"ignpar", input, REV, IGNPAR, 0},
{"parmrk", input, REV, PARMRK, 0},
{"inpck", input, REV, INPCK, 0},
{"istrip", input, REV, ISTRIP, 0},
{"inlcr", input, SANE_UNSET | REV, INLCR, 0},
{"igncr", input, SANE_UNSET | REV, IGNCR, 0},
{"icrnl", input, SANE_SET | REV, ICRNL, 0},
{"ixon", input, REV, IXON, 0},
{"ixoff", input, SANE_UNSET | REV, IXOFF, 0},
{"tandem", input, REV | OMIT, IXOFF, 0},
#ifdef IUCLC
{"iuclc", input, SANE_UNSET | REV, IUCLC, 0},
#endif
#ifdef IXANY
{"ixany", input, SANE_UNSET | REV, IXANY, 0},
#endif
#ifdef IMAXBEL
{"imaxbel", input, SANE_SET | REV, IMAXBEL, 0},
#endif
#ifdef IUTF8
{"iutf8", input, SANE_UNSET | REV, IUTF8, 0},
#endif
{"opost", output, SANE_SET | REV, OPOST, 0},
#ifdef OLCUC
{"olcuc", output, SANE_UNSET | REV, OLCUC, 0},
#endif
#ifdef OCRNL
{"ocrnl", output, SANE_UNSET | REV, OCRNL, 0},
#endif
#ifdef ONLCR
{"onlcr", output, SANE_SET | REV, ONLCR, 0},
#endif
#ifdef ONOCR
{"onocr", output, SANE_UNSET | REV, ONOCR, 0},
#endif
#ifdef ONLRET
{"onlret", output, SANE_UNSET | REV, ONLRET, 0},
#endif
#ifdef OFILL
{"ofill", output, SANE_UNSET | REV, OFILL, 0},
#endif
#ifdef OFDEL
{"ofdel", output, SANE_UNSET | REV, OFDEL, 0},
#endif
#ifdef NLDLY
{"nl1", output, SANE_UNSET, NL1, NLDLY},
{"nl0", output, SANE_SET, NL0, NLDLY},
#endif
#ifdef CRDLY
{"cr3", output, SANE_UNSET, CR3, CRDLY},
{"cr2", output, SANE_UNSET, CR2, CRDLY},
{"cr1", output, SANE_UNSET, CR1, CRDLY},
{"cr0", output, SANE_SET, CR0, CRDLY},
#endif
#ifdef TABDLY
# ifdef TAB3
{"tab3", output, SANE_UNSET, TAB3, TABDLY},
# endif
# ifdef TAB2
{"tab2", output, SANE_UNSET, TAB2, TABDLY},
# endif
# ifdef TAB1
{"tab1", output, SANE_UNSET, TAB1, TABDLY},
# endif
# ifdef TAB0
{"tab0", output, SANE_SET, TAB0, TABDLY},
# endif
#else
# ifdef OXTABS
{"tab3", output, SANE_UNSET, OXTABS, 0},
# endif
#endif
#ifdef BSDLY
{"bs1", output, SANE_UNSET, BS1, BSDLY},
{"bs0", output, SANE_SET, BS0, BSDLY},
#endif
#ifdef VTDLY
{"vt1", output, SANE_UNSET, VT1, VTDLY},
{"vt0", output, SANE_SET, VT0, VTDLY},
#endif
#ifdef FFDLY
{"ff1", output, SANE_UNSET, FF1, FFDLY},
{"ff0", output, SANE_SET, FF0, FFDLY},
#endif
{"isig", local, SANE_SET | REV, ISIG, 0},
{"icanon", local, SANE_SET | REV, ICANON, 0},
#ifdef IEXTEN
{"iexten", local, SANE_SET | REV, IEXTEN, 0},
#endif
{"echo", local, SANE_SET | REV, ECHO, 0},
{"echoe", local, SANE_SET | REV, ECHOE, 0},
{"crterase", local, REV | OMIT, ECHOE, 0},
{"echok", local, SANE_SET | REV, ECHOK, 0},
{"echonl", local, SANE_UNSET | REV, ECHONL, 0},
{"noflsh", local, SANE_UNSET | REV, NOFLSH, 0},
#ifdef XCASE
{"xcase", local, SANE_UNSET | REV, XCASE, 0},
#endif
#ifdef TOSTOP
{"tostop", local, SANE_UNSET | REV, TOSTOP, 0},
#endif
#ifdef ECHOPRT
{"echoprt", local, SANE_UNSET | REV, ECHOPRT, 0},
{"prterase", local, REV | OMIT, ECHOPRT, 0},
#endif
#ifdef ECHOCTL
{"echoctl", local, SANE_SET | REV, ECHOCTL, 0},
{"ctlecho", local, REV | OMIT, ECHOCTL, 0},
#endif
#ifdef ECHOKE
{"echoke", local, SANE_SET | REV, ECHOKE, 0},
{"crtkill", local, REV | OMIT, ECHOKE, 0},
#endif
#ifdef FLUSHO
{"flusho", local, SANE_UNSET | REV, FLUSHO, 0},
#endif
#if defined TIOCEXT
{"extproc", local, SANE_UNSET | REV | NO_SETATTR, EXTPROC, 0},
#elif defined EXTPROC
{"extproc", local, SANE_UNSET | REV, EXTPROC, 0},
#endif
{"evenp", combination, REV | OMIT, 0, 0},
{"parity", combination, REV | OMIT, 0, 0},
{"oddp", combination, REV | OMIT, 0, 0},
{"nl", combination, REV | OMIT, 0, 0},
{"ek", combination, OMIT, 0, 0},
{"sane", combination, OMIT, 0, 0},
{"cooked", combination, REV | OMIT, 0, 0},
{"raw", combination, REV | OMIT, 0, 0},
{"pass8", combination, REV | OMIT, 0, 0},
{"litout", combination, REV | OMIT, 0, 0},
{"cbreak", combination, REV | OMIT, 0, 0},
#ifdef IXANY
{"decctlq", combination, REV | OMIT, 0, 0},
#endif
#if defined TABDLY || defined OXTABS
{"tabs", combination, REV | OMIT, 0, 0},
#endif
#if defined XCASE && defined IUCLC && defined OLCUC
{"lcase", combination, REV | OMIT, 0, 0},
{"LCASE", combination, REV | OMIT, 0, 0},
#endif
{"crt", combination, OMIT, 0, 0},
{"dec", combination, OMIT, 0, 0},
{NULL, control, 0, 0, 0}
};
/* Control character settings. */
struct control_info
{
const char *name; /* Name given on command line. */
cc_t saneval; /* Value to set for 'stty sane'. */
size_t offset; /* Offset in c_cc. */
};
/* Control characters. */
static struct control_info const control_info[] =
{
{"intr", CINTR, VINTR},
{"quit", CQUIT, VQUIT},
{"erase", CERASE, VERASE},
{"kill", CKILL, VKILL},
{"eof", CEOF, VEOF},
{"eol", CEOL, VEOL},
#ifdef VEOL2
{"eol2", CEOL2, VEOL2},
#endif
#ifdef VSWTCH
{"swtch", CSWTCH, VSWTCH},
#endif
{"start", CSTART, VSTART},
{"stop", CSTOP, VSTOP},
{"susp", CSUSP, VSUSP},
#ifdef VDSUSP
{"dsusp", CDSUSP, VDSUSP},
#endif
#ifdef VREPRINT
{"rprnt", CRPRNT, VREPRINT},
#else
# ifdef CREPRINT /* HPUX 10.20 needs this */
{"rprnt", CRPRNT, CREPRINT},
# endif
#endif
#ifdef VWERASE
{"werase", CWERASE, VWERASE},
#endif
#ifdef VLNEXT
{"lnext", CLNEXT, VLNEXT},
#endif
#ifdef VFLUSHO
{"flush", CFLUSHO, VFLUSHO}, /* deprecated compat option. */
{"discard", CFLUSHO, VFLUSHO},
#endif
#ifdef VSTATUS
{"status", CSTATUS, VSTATUS},
#endif
/* These must be last because of the display routines. */
{"min", 1, VMIN},
{"time", 0, VTIME},
{NULL, 0, 0}
};
static char const *visible (cc_t ch);
static unsigned long int baud_to_value (speed_t speed);
static bool recover_mode (char const *arg, struct termios *mode);
static int screen_columns (void);
static bool set_mode (struct mode_info const *info, bool reversed,
struct termios *mode);
static unsigned long int integer_arg (const char *s, unsigned long int max);
static speed_t string_to_baud (const char *arg);
static tcflag_t *mode_type_flag (enum mode_type type, struct termios *mode);
static void display_all (struct termios *mode, char const *device_name);
static void display_changed (struct termios *mode);
static void display_recoverable (struct termios *mode);
static void display_settings (enum output_type output_type,
struct termios *mode,
const char *device_name);
static void display_speed (struct termios *mode, bool fancy);
static void display_window_size (bool fancy, char const *device_name);
static void sane_mode (struct termios *mode);
static void set_control_char (struct control_info const *info,
const char *arg,
struct termios *mode);
static void set_speed (enum speed_setting type, const char *arg,
struct termios *mode);
static void set_window_size (int rows, int cols, char const *device_name);
/* The width of the screen, for output wrapping. */
static int max_col;
/* Current position, to know when to wrap. */
static int current_col;
/* Default "drain" mode for tcsetattr. */
static int tcsetattr_options = TCSADRAIN;
static struct option const longopts[] =
{
{"all", no_argument, NULL, 'a'},
{"save", no_argument, NULL, 'g'},
{"file", required_argument, NULL, 'F'},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{NULL, 0, NULL, 0}
};
static void wrapf (const char *message, ...)
__attribute__ ((__format__ (__printf__, 1, 2)));
/* Print format string MESSAGE and optional args.
Wrap to next line first if it won't fit.
Print a space first unless MESSAGE will start a new line. */
static void
wrapf (const char *message,...)
{
va_list args;
char *buf;
int buflen;
va_start (args, message);
buflen = vasprintf (&buf, message, args);
va_end (args);
if (buflen < 0)
xalloc_die ();
if (0 < current_col)
{
if (max_col - current_col < buflen)
{
putchar ('\n');
current_col = 0;
}
else
{
putchar (' ');
current_col++;
}
}
fputs (buf, stdout);
free (buf);
current_col += buflen;
}
void
usage (int status)
{
if (status != EXIT_SUCCESS)
emit_try_help ();
else
{
printf (_("\
Usage: %s [-F DEVICE | --file=DEVICE] [SETTING]...\n\
or: %s [-F DEVICE | --file=DEVICE] [-a|--all]\n\
or: %s [-F DEVICE | --file=DEVICE] [-g|--save]\n\
"),
program_name, program_name, program_name);
fputs (_("\
Print or change terminal characteristics.\n\
"), stdout);
emit_mandatory_arg_note ();
fputs (_("\
-a, --all print all current settings in human-readable form\n\
-g, --save print all current settings in a stty-readable form\n\
-F, --file=DEVICE open and use the specified DEVICE instead of stdin\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
fputs (VERSION_OPTION_DESCRIPTION, stdout);
fputs (_("\
\n\
Optional - before SETTING indicates negation. An * marks non-POSIX\n\
settings. The underlying system defines which settings are available.\n\
"), stdout);
fputs (_("\
\n\
Special characters:\n"), stdout);
#ifdef VFLUSHO
fputs (_("\
* discard CHAR CHAR will toggle discarding of output\n\
"), stdout);
#endif
#ifdef VDSUSP
fputs (_("\
* dsusp CHAR CHAR will send a terminal stop signal once input flushed\n\
"), stdout);
#endif
fputs (_("\
eof CHAR CHAR will send an end of file (terminate the input)\n\
eol CHAR CHAR will end the line\n\
"), stdout);
#ifdef VEOL2
fputs (_("\
* eol2 CHAR alternate CHAR for ending the line\n\
"), stdout);
#endif
fputs (_("\
erase CHAR CHAR will erase the last character typed\n\
intr CHAR CHAR will send an interrupt signal\n\
kill CHAR CHAR will erase the current line\n\
"), stdout);
#ifdef VLNEXT
fputs (_("\
* lnext CHAR CHAR will enter the next character quoted\n\
"), stdout);
#endif
#ifdef VSTATUS
fputs (_("\
* status CHAR CHAR will send an info signal\n\
"), stdout);
#endif
fputs (_("\
quit CHAR CHAR will send a quit signal\n\
"), stdout);
#if defined CREPRINT || defined VREPRINT
fputs (_("\
* rprnt CHAR CHAR will redraw the current line\n\
"), stdout);
#endif
fputs (_("\
start CHAR CHAR will restart the output after stopping it\n\
stop CHAR CHAR will stop the output\n\
susp CHAR CHAR will send a terminal stop signal\n\
"), stdout);
#ifdef VSWTCH
fputs (_("\
* swtch CHAR CHAR will switch to a different shell layer\n\
"), stdout);
#endif
#ifdef VWERASE
fputs (_("\
* werase CHAR CHAR will erase the last word typed\n\
"), stdout);
#endif
fputs (_("\
\n\
Special settings:\n\
N set the input and output speeds to N bauds\n\
"), stdout);
#ifdef TIOCGWINSZ
fputs (_("\
* cols N tell the kernel that the terminal has N columns\n\
* columns N same as cols N\n\
"), stdout);
#endif
printf (_("\
* [-]drain wait for transmission before applying settings (%s by default)\
\n"), tcsetattr_options == TCSADRAIN ? _("on") : _("off"));
fputs (_("\
ispeed N set the input speed to N\n\
"), stdout);
#ifdef HAVE_C_LINE
fputs (_("\
* line N use line discipline N\n\
"), stdout);
#endif
fputs (_("\
min N with -icanon, set N characters minimum for a completed read\n\
ospeed N set the output speed to N\n\
"), stdout);
#ifdef TIOCGWINSZ
fputs (_("\
* rows N tell the kernel that the terminal has N rows\n\
* size print the number of rows and columns according to the kernel\n\
"), stdout);
#endif
fputs (_("\
speed print the terminal speed\n\
time N with -icanon, set read timeout of N tenths of a second\n\
"), stdout);
fputs (_("\
\n\
Control settings:\n\
[-]clocal disable modem control signals\n\
[-]cread allow input to be received\n\
"), stdout);
#ifdef CRTSCTS
fputs (_("\
* [-]crtscts enable RTS/CTS handshaking\n\
"), stdout);
#endif
#ifdef CDTRDSR
fputs (_("\
* [-]cdtrdsr enable DTR/DSR handshaking\n\
"), stdout);
#endif
fputs (_("\
csN set character size to N bits, N in [5..8]\n\
"), stdout);
fputs (_("\
[-]cstopb use two stop bits per character (one with '-')\n\
[-]hup send a hangup signal when the last process closes the tty\n\
[-]hupcl same as [-]hup\n\
[-]parenb generate parity bit in output and expect parity bit in input\n\
[-]parodd set odd parity (or even parity with '-')\n\
"), stdout);
#ifdef CMSPAR
fputs (_("\
* [-]cmspar use \"stick\" (mark/space) parity\n\
"), stdout);
#endif
fputs (_("\
\n\
Input settings:\n\
[-]brkint breaks cause an interrupt signal\n\
[-]icrnl translate carriage return to newline\n\
[-]ignbrk ignore break characters\n\
[-]igncr ignore carriage return\n\
[-]ignpar ignore characters with parity errors\n\
"), stdout);
#ifdef IMAXBEL
fputs (_("\
* [-]imaxbel beep and do not flush a full input buffer on a character\n\
"), stdout);
#endif
fputs (_("\
[-]inlcr translate newline to carriage return\n\
[-]inpck enable input parity checking\n\
[-]istrip clear high (8th) bit of input characters\n\
"), stdout);
#ifdef IUTF8
fputs (_("\
* [-]iutf8 assume input characters are UTF-8 encoded\n\
"), stdout);
#endif
#ifdef IUCLC
fputs (_("\
* [-]iuclc translate uppercase characters to lowercase\n\
"), stdout);
#endif
#ifdef IXANY
fputs (_("\
* [-]ixany let any character restart output, not only start character\n\
"), stdout);
#endif
fputs (_("\
[-]ixoff enable sending of start/stop characters\n\
[-]ixon enable XON/XOFF flow control\n\
[-]parmrk mark parity errors (with a 255-0-character sequence)\n\
[-]tandem same as [-]ixoff\n\
"), stdout);
fputs (_("\
\n\
Output settings:\n\
"), stdout);
#ifdef BSDLY
fputs (_("\
* bsN backspace delay style, N in [0..1]\n\
"), stdout);
#endif
#ifdef CRDLY
fputs (_("\
* crN carriage return delay style, N in [0..3]\n\
"), stdout);
#endif
#ifdef FFDLY
fputs (_("\
* ffN form feed delay style, N in [0..1]\n\
"), stdout);
#endif
#ifdef NLDLY
fputs (_("\
* nlN newline delay style, N in [0..1]\n\
"), stdout);
#endif
#ifdef OCRNL
fputs (_("\
* [-]ocrnl translate carriage return to newline\n\
"), stdout);
#endif
#ifdef OFDEL
fputs (_("\
* [-]ofdel use delete characters for fill instead of NUL characters\n\
"), stdout);
#endif
#ifdef OFILL
fputs (_("\
* [-]ofill use fill (padding) characters instead of timing for delays\n\
"), stdout);
#endif
#ifdef OLCUC
fputs (_("\
* [-]olcuc translate lowercase characters to uppercase\n\
"), stdout);
#endif
#ifdef ONLCR
fputs (_("\
* [-]onlcr translate newline to carriage return-newline\n\
"), stdout);
#endif
#ifdef ONLRET
fputs (_("\
* [-]onlret newline performs a carriage return\n\
"), stdout);
#endif
#ifdef ONOCR
fputs (_("\
* [-]onocr do not print carriage returns in the first column\n\
"), stdout);
#endif
fputs (_("\
[-]opost postprocess output\n\
"), stdout);
#if defined TABDLY || defined OXTABS
fputs (_("\
* tabN horizontal tab delay style, N in [0..3]\n\
* tabs same as tab0\n\
* -tabs same as tab3\n\
"), stdout);
#endif
#ifdef VTDLY
fputs (_("\
* vtN vertical tab delay style, N in [0..1]\n\
"), stdout);
#endif
fputs (_("\
\n\
Local settings:\n\
[-]crterase echo erase characters as backspace-space-backspace\n\
"), stdout);
#ifdef ECHOKE
fputs (_("\
* crtkill kill all line by obeying the echoprt and echoe settings\n\
* -crtkill kill all line by obeying the echoctl and echok settings\n\
"), stdout);
#endif
#ifdef ECHOCTL
fputs (_("\
* [-]ctlecho echo control characters in hat notation ('^c')\n\
"), stdout);
#endif
fputs (_("\
[-]echo echo input characters\n\
"), stdout);
#ifdef ECHOCTL
fputs (_("\
* [-]echoctl same as [-]ctlecho\n\
"), stdout);
#endif
fputs (_("\
[-]echoe same as [-]crterase\n\
[-]echok echo a newline after a kill character\n\
"), stdout);
#ifdef ECHOKE
fputs (_("\
* [-]echoke same as [-]crtkill\n\
"), stdout);
#endif
fputs (_("\
[-]echonl echo newline even if not echoing other characters\n\
"), stdout);
#ifdef ECHOPRT
fputs (_("\
* [-]echoprt echo erased characters backward, between '\\' and '/'\n\
"), stdout);
#endif
#if defined EXTPROC || defined TIOCEXT
fputs (_("\
* [-]extproc enable \"LINEMODE\"; useful with high latency links\n\
"), stdout);
#endif
#if defined FLUSHO
fputs (_("\
* [-]flusho discard output\n\
"), stdout);
#endif
printf (_("\
[-]icanon enable special characters: %s\n\
[-]iexten enable non-POSIX special characters\n\
"), "erase, kill"
#ifdef VWERASE
", werase"
#endif
#if defined CREPRINT || defined VREPRINT
", rprnt"
#endif
);
fputs (_("\
[-]isig enable interrupt, quit, and suspend special characters\n\
[-]noflsh disable flushing after interrupt and quit special characters\n\
"), stdout);
#ifdef ECHOPRT
fputs (_("\
* [-]prterase same as [-]echoprt\n\
"), stdout);
#endif
#ifdef TOSTOP
fputs (_("\
* [-]tostop stop background jobs that try to write to the terminal\n\
"), stdout);
#endif
#ifdef XCASE
fputs (_("\
* [-]xcase with icanon, escape with '\\' for uppercase characters\n\
"), stdout);
#endif
fputs (_("\
\n\
Combination settings:\n\
"), stdout);
#if defined XCASE && defined IUCLC && defined OLCUC
fputs (_("\
* [-]LCASE same as [-]lcase\n\
"), stdout);
#endif
fputs (_("\
cbreak same as -icanon\n\
-cbreak same as icanon\n\
"), stdout);
fputs (_("\
cooked same as brkint ignpar istrip icrnl ixon opost isig\n\
icanon, eof and eol characters to their default values\n\
-cooked same as raw\n\
"), stdout);
printf (_("\
crt same as %s\n\
"), "echoe"
#ifdef ECHOCTL
" echoctl"
#endif
#ifdef ECHOKE
" echoke"
#endif
);
printf (_("\
dec same as %s intr ^c erase 0177\n\
kill ^u\n\
"), "echoe"
#ifdef ECHOCTL
" echoctl"
#endif
#ifdef ECHOKE
" echoke"
#endif
#ifdef IXANY
" -ixany"
#endif
);
#ifdef IXANY
fputs (_("\
* [-]decctlq same as [-]ixany\n\
"), stdout);
#endif
fputs (_("\
ek erase and kill characters to their default values\n\
evenp same as parenb -parodd cs7\n\
-evenp same as -parenb cs8\n\
"), stdout);
#if defined XCASE && defined IUCLC && defined OLCUC
fputs (_("\
* [-]lcase same as xcase iuclc olcuc\n\
"), stdout);
#endif
fputs (_("\
litout same as -parenb -istrip -opost cs8\n\
-litout same as parenb istrip opost cs7\n\
"), stdout);
printf (_("\
nl same as %s\n\
-nl same as %s\n\
"), "-icrnl"
#ifdef ONLCR
" -onlcr"
#endif
, "icrnl -inlcr -igncr"
#ifdef ONLCR
" onlcr"
#endif
#ifdef OCRNL
" -ocrnl"
#endif
#ifdef ONLRET
" -onlret"
#endif
);
fputs (_("\
oddp same as parenb parodd cs7\n\
-oddp same as -parenb cs8\n\
[-]parity same as [-]evenp\n\
pass8 same as -parenb -istrip cs8\n\
-pass8 same as parenb istrip cs7\n\
"), stdout);
printf (_("\
raw same as -ignbrk -brkint -ignpar -parmrk -inpck -istrip\n\
-inlcr -igncr -icrnl -ixon -ixoff -icanon -opost\n\
-isig%s min 1 time 0\n\
-raw same as cooked\n\
"),
#ifdef IUCLC
" -iuclc"
#endif
#ifdef IXANY
" -ixany"
#endif
#ifdef IMAXBEL
" -imaxbel"
#endif
#ifdef XCASE
" -xcase"
#endif
);
printf (_("\
sane same as cread -ignbrk brkint -inlcr -igncr icrnl\n\
icanon iexten echo echoe echok -echonl -noflsh\n\
%s\n\
%s\n\
%s,\n\
all special characters to their default values\n\
"),
"-ixoff"
#ifdef IUTF8
" -iutf8"
#endif
#ifdef IUCLC
" -iuclc"
#endif
#ifdef IXANY
" -ixany"
#endif
#ifdef IMAXBEL
" imaxbel"
#endif
#ifdef XCASE
" -xcase"
#endif
#ifdef OLCUC
" -olcuc"
#endif
#ifdef OCRNL
" -ocrnl"
#endif
, "opost"
#ifdef OFILL
" -ofill"
#endif
#ifdef ONLCR
" onlcr"
#endif
#ifdef ONOCR
" -onocr"
#endif
#ifdef ONLRET
" -onlret"
#endif
#ifdef NLDLY
" nl0"
#endif
#ifdef CRDLY
" cr0"
#endif
#ifdef TAB0
" tab0"
#endif
#ifdef BSDLY
" bs0"
#endif
#ifdef VTDLY
" vt0"
#endif
#ifdef FFDLY
" ff0"
#endif
, "isig"
#ifdef TOSTOP
" -tostop"
#endif
#ifdef OFDEL
" -ofdel"
#endif
#ifdef ECHOPRT
" -echoprt"
#endif
#ifdef ECHOCTL
" echoctl"
#endif
#ifdef ECHOKE
" echoke"
#endif
#ifdef EXTPROC
" -extproc"
#endif
#ifdef FLUSHO
" -flusho"
#endif
);
fputs (_("\
\n\
Handle the tty line connected to standard input. Without arguments,\n\
prints baud rate, line discipline, and deviations from stty sane. In\n\
settings, CHAR is taken literally, or coded as in ^c, 0x37, 0177 or\n\
127; special values ^- or undef used to disable special characters.\n\
"), stdout);
emit_ancillary_info (PROGRAM_NAME);
}
exit (status);
}
int
main (int argc, char **argv)
{
/* Initialize to all zeroes so there is no risk memcmp will report a
spurious difference in an uninitialized portion of the structure. */
static struct termios mode;
enum output_type output_type;
int optc;
int argi = 0;
int opti = 1;
bool require_set_attr;
bool speed_was_set _GL_UNUSED;
bool verbose_output;
bool recoverable_output;
int k;
bool noargs = true;
char *file_name = NULL;
const char *device_name;
initialize_main (&argc, &argv);
set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
output_type = changed;
verbose_output = false;
recoverable_output = false;
/* Don't print error messages for unrecognized options. */
opterr = 0;
/* If any new options are ever added to stty, the short options MUST
NOT allow any ambiguity with the stty settings. For example, the
stty setting "-gagFork" would not be feasible, since it will be
parsed as "-g -a -g -F ork". If you change anything about how
stty parses options, be sure it still works with combinations of
short and long options, --, POSIXLY_CORRECT, etc. */
while ((optc = getopt_long (argc - argi, argv + argi, "-agF:",
longopts, NULL))
!= -1)
{
switch (optc)
{
case 'a':
verbose_output = true;
output_type = all;
break;
case 'g':
recoverable_output = true;
output_type = recoverable;
break;
case 'F':
if (file_name)
error (EXIT_FAILURE, 0, _("only one device may be specified"));
file_name = optarg;
break;
case_GETOPT_HELP_CHAR;
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
default:
/* Consider "drain" as an option rather than a setting,
to support: alias stty='stty -drain' etc. */
if (! STREQ (argv[argi + opti], "-drain")
&& ! STREQ (argv[argi + opti], "drain"))
noargs = false;
/* Skip the argument containing this unrecognized option;
the 2nd pass will analyze it. */
argi += opti;
/* Restart getopt_long from the first unskipped argument. */
opti = 1;
optind = 0;
break;
}
/* Clear fully-parsed arguments, so they don't confuse the 2nd pass. */
while (opti < optind)
argv[argi + opti++] = NULL;
}
/* Specifying both -a and -g gets an error. */
if (verbose_output && recoverable_output)
error (EXIT_FAILURE, 0,
_("the options for verbose and stty-readable output styles are\n"
"mutually exclusive"));
/* Specifying any other arguments with -a or -g gets an error. */
if (!noargs && (verbose_output || recoverable_output))
error (EXIT_FAILURE, 0,
_("when specifying an output style, modes may not be set"));
/* FIXME: it'd be better not to open the file until we've verified
that all arguments are valid. Otherwise, we could end up doing
only some of the requested operations and then failing, probably
leaving things in an undesirable state. */
if (file_name)
{
int fdflags;
device_name = file_name;
if (fd_reopen (STDIN_FILENO, device_name, O_RDONLY | O_NONBLOCK, 0) < 0)
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
if ((fdflags = fcntl (STDIN_FILENO, F_GETFL)) == -1
|| fcntl (STDIN_FILENO, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
error (EXIT_FAILURE, errno, _("%s: couldn't reset non-blocking mode"),
quotef (device_name));
}
else
device_name = _("standard input");
if (tcgetattr (STDIN_FILENO, &mode))
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
if (verbose_output || recoverable_output || noargs)
{
max_col = screen_columns ();
current_col = 0;
display_settings (output_type, &mode, device_name);
return EXIT_SUCCESS;
}
speed_was_set = false;
require_set_attr = false;
for (k = 1; k < argc; k++)
{
char const *arg = argv[k];
bool match_found = false;
bool not_set_attr = false;
bool reversed = false;
int i;
if (! arg)
continue;
if (arg[0] == '-')
{
++arg;
reversed = true;
}
if (STREQ (arg, "drain"))
{
tcsetattr_options = reversed ? TCSANOW : TCSADRAIN;
continue;
}
for (i = 0; mode_info[i].name != NULL; ++i)
{
if (STREQ (arg, mode_info[i].name))
{
if ((mode_info[i].flags & NO_SETATTR) == 0)
{
match_found = set_mode (&mode_info[i], reversed, &mode);
require_set_attr = true;
}
else
match_found = not_set_attr = true;
break;
}
}
if (!match_found && reversed)
{
error (0, 0, _("invalid argument %s"), quote (arg - 1));
usage (EXIT_FAILURE);
}
if (!match_found)
{
for (i = 0; control_info[i].name != NULL; ++i)
{
if (STREQ (arg, control_info[i].name))
{
if (k == argc - 1)
{
error (0, 0, _("missing argument to %s"), quote (arg));
usage (EXIT_FAILURE);
}
match_found = true;
++k;
set_control_char (&control_info[i], argv[k], &mode);
require_set_attr = true;
break;
}
}
}
if (!match_found || not_set_attr)
{
if (STREQ (arg, "ispeed"))
{
if (k == argc - 1)
{
error (0, 0, _("missing argument to %s"), quote (arg));
usage (EXIT_FAILURE);
}
++k;
set_speed (input_speed, argv[k], &mode);
speed_was_set = true;
require_set_attr = true;
}
else if (STREQ (arg, "ospeed"))
{
if (k == argc - 1)
{
error (0, 0, _("missing argument to %s"), quote (arg));
usage (EXIT_FAILURE);
}
++k;
set_speed (output_speed, argv[k], &mode);
speed_was_set = true;
require_set_attr = true;
}
#ifdef TIOCEXT
/* This is the BSD interface to "extproc".
Even though it's an lflag, an ioctl is used to set it. */
else if (STREQ (arg, "extproc"))
{
int val = ! reversed;
if (ioctl (STDIN_FILENO, TIOCEXT, &val) != 0)
{
error (EXIT_FAILURE, errno, _("%s: error setting %s"),
quotef_n (0, device_name), quote_n (1, arg));
}
}
#endif
#ifdef TIOCGWINSZ
else if (STREQ (arg, "rows"))
{
if (k == argc - 1)
{
error (0, 0, _("missing argument to %s"), quote (arg));
usage (EXIT_FAILURE);
}
++k;
set_window_size (integer_arg (argv[k], INT_MAX), -1,
device_name);
}
else if (STREQ (arg, "cols")
|| STREQ (arg, "columns"))
{
if (k == argc - 1)
{
error (0, 0, _("missing argument to %s"), quote (arg));
usage (EXIT_FAILURE);
}
++k;
set_window_size (-1, integer_arg (argv[k], INT_MAX),
device_name);
}
else if (STREQ (arg, "size"))
{
max_col = screen_columns ();
current_col = 0;
display_window_size (false, device_name);
}
#endif
#ifdef HAVE_C_LINE
else if (STREQ (arg, "line"))
{
unsigned long int value;
if (k == argc - 1)
{
error (0, 0, _("missing argument to %s"), quote (arg));
usage (EXIT_FAILURE);
}
++k;
mode.c_line = value = integer_arg (argv[k], ULONG_MAX);
if (mode.c_line != value)
error (0, 0, _("invalid line discipline %s"), quote (argv[k]));
require_set_attr = true;
}
#endif
else if (STREQ (arg, "speed"))
{
max_col = screen_columns ();
display_speed (&mode, false);
}
else if (string_to_baud (arg) != (speed_t) -1)
{
set_speed (both_speeds, arg, &mode);
speed_was_set = true;
require_set_attr = true;
}
else
{
if (! recover_mode (arg, &mode))
{
error (0, 0, _("invalid argument %s"), quote (arg));
usage (EXIT_FAILURE);
}
require_set_attr = true;
}
}
}
if (require_set_attr)
{
/* Initialize to all zeroes so there is no risk memcmp will report a
spurious difference in an uninitialized portion of the structure. */
static struct termios new_mode;
if (tcsetattr (STDIN_FILENO, tcsetattr_options, &mode))
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
/* POSIX (according to Zlotnick's book) tcsetattr returns zero if
it performs *any* of the requested operations. This means it
can report 'success' when it has actually failed to perform
some proper subset of the requested operations. To detect
this partial failure, get the current terminal attributes and
compare them to the requested ones. */
if (tcgetattr (STDIN_FILENO, &new_mode))
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
/* Normally, one shouldn't use memcmp to compare structures that
may have 'holes' containing uninitialized data, but we have been
careful to initialize the storage of these two variables to all
zeroes. One might think it more efficient simply to compare the
modified fields, but that would require enumerating those fields --
and not all systems have the same fields in this structure. */
if (memcmp (&mode, &new_mode, sizeof (mode)) != 0)
{
#ifdef CIBAUD
/* SunOS 4.1.3 (at least) has the problem that after this sequence,
tcgetattr (&m1); tcsetattr (&m1); tcgetattr (&m2);
sometimes (m1 != m2). The only difference is in the four bits
of the c_cflag field corresponding to the baud rate. To save
Sun users a little confusion, don't report an error if this
happens. But suppress the error only if we haven't tried to
set the baud rate explicitly -- otherwise we'd never give an
error for a true failure to set the baud rate. */
new_mode.c_cflag &= (~CIBAUD);
if (speed_was_set || memcmp (&mode, &new_mode, sizeof (mode)) != 0)
#endif
{
error (EXIT_FAILURE, 0,
_("%s: unable to perform all requested operations"),
quotef (device_name));
#ifdef TESTING
{
size_t i;
printf ("new_mode: mode\n");
for (i = 0; i < sizeof (new_mode); i++)
printf ("0x%02x: 0x%02x\n",
*(((unsigned char *) &new_mode) + i),
*(((unsigned char *) &mode) + i));
}
#endif
}
}
}
return EXIT_SUCCESS;
}
/* Return false if not applied because not reversible; otherwise
return true. */
static bool
set_mode (struct mode_info const *info, bool reversed, struct termios *mode)
{
tcflag_t *bitsp;
if (reversed && (info->flags & REV) == 0)
return false;
bitsp = mode_type_flag (info->type, mode);
if (bitsp == NULL)
{
/* Combination mode. */
if (STREQ (info->name, "evenp") || STREQ (info->name, "parity"))
{
if (reversed)
mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
else
mode->c_cflag = (mode->c_cflag & ~PARODD & ~CSIZE) | PARENB | CS7;
}
else if (STREQ (info->name, "oddp"))
{
if (reversed)
mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
else
mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARODD | PARENB;
}
else if (STREQ (info->name, "nl"))
{
if (reversed)
{
mode->c_iflag = (mode->c_iflag | ICRNL) & ~INLCR & ~IGNCR;
mode->c_oflag = (mode->c_oflag
#ifdef ONLCR
| ONLCR
#endif
)
#ifdef OCRNL
& ~OCRNL
#endif
#ifdef ONLRET
& ~ONLRET
#endif
;
}
else
{
mode->c_iflag = mode->c_iflag & ~ICRNL;
#ifdef ONLCR
mode->c_oflag = mode->c_oflag & ~ONLCR;
#endif
}
}
else if (STREQ (info->name, "ek"))
{
mode->c_cc[VERASE] = CERASE;
mode->c_cc[VKILL] = CKILL;
}
else if (STREQ (info->name, "sane"))
sane_mode (mode);
else if (STREQ (info->name, "cbreak"))
{
if (reversed)
mode->c_lflag |= ICANON;
else
mode->c_lflag &= ~ICANON;
}
else if (STREQ (info->name, "pass8"))
{
if (reversed)
{
mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
mode->c_iflag |= ISTRIP;
}
else
{
mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
mode->c_iflag &= ~ISTRIP;
}
}
else if (STREQ (info->name, "litout"))
{
if (reversed)
{
mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
mode->c_iflag |= ISTRIP;
mode->c_oflag |= OPOST;
}
else
{
mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
mode->c_iflag &= ~ISTRIP;
mode->c_oflag &= ~OPOST;
}
}
else if (STREQ (info->name, "raw") || STREQ (info->name, "cooked"))
{
if ((info->name[0] == 'r' && reversed)
|| (info->name[0] == 'c' && !reversed))
{
/* Cooked mode. */
mode->c_iflag |= BRKINT | IGNPAR | ISTRIP | ICRNL | IXON;
mode->c_oflag |= OPOST;
mode->c_lflag |= ISIG | ICANON;
#if VMIN == VEOF
mode->c_cc[VEOF] = CEOF;
#endif
#if VTIME == VEOL
mode->c_cc[VEOL] = CEOL;
#endif
}
else
{
/* Raw mode. */
mode->c_iflag = 0;
mode->c_oflag &= ~OPOST;
mode->c_lflag &= ~(ISIG | ICANON
#ifdef XCASE
| XCASE
#endif
);
mode->c_cc[VMIN] = 1;
mode->c_cc[VTIME] = 0;
}
}
#ifdef IXANY
else if (STREQ (info->name, "decctlq"))
{
if (reversed)
mode->c_iflag |= IXANY;
else
mode->c_iflag &= ~IXANY;
}
#endif
#ifdef TABDLY
else if (STREQ (info->name, "tabs"))
{
if (reversed)
mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3;
else
mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0;
}
#else
# ifdef OXTABS
else if (STREQ (info->name, "tabs"))
{
if (reversed)
mode->c_oflag = mode->c_oflag | OXTABS;
else
mode->c_oflag = mode->c_oflag & ~OXTABS;
}
# endif
#endif
#if defined XCASE && defined IUCLC && defined OLCUC
else if (STREQ (info->name, "lcase")
|| STREQ (info->name, "LCASE"))
{
if (reversed)
{
mode->c_lflag &= ~XCASE;
mode->c_iflag &= ~IUCLC;
mode->c_oflag &= ~OLCUC;
}
else
{
mode->c_lflag |= XCASE;
mode->c_iflag |= IUCLC;
mode->c_oflag |= OLCUC;
}
}
#endif
else if (STREQ (info->name, "crt"))
mode->c_lflag |= ECHOE
#ifdef ECHOCTL
| ECHOCTL
#endif
#ifdef ECHOKE
| ECHOKE
#endif
;
else if (STREQ (info->name, "dec"))
{
mode->c_cc[VINTR] = 3; /* ^C */
mode->c_cc[VERASE] = 127; /* DEL */
mode->c_cc[VKILL] = 21; /* ^U */
mode->c_lflag |= ECHOE
#ifdef ECHOCTL
| ECHOCTL
#endif
#ifdef ECHOKE
| ECHOKE
#endif
;
#ifdef IXANY
mode->c_iflag &= ~IXANY;
#endif
}
}
else if (reversed)
*bitsp = *bitsp & ~info->mask & ~info->bits;
else
*bitsp = (*bitsp & ~info->mask) | info->bits;
return true;
}
static void
set_control_char (struct control_info const *info, const char *arg,
struct termios *mode)
{
unsigned long int value;
if (STREQ (info->name, "min") || STREQ (info->name, "time"))
value = integer_arg (arg, TYPE_MAXIMUM (cc_t));
else if (arg[0] == '\0' || arg[1] == '\0')
value = to_uchar (arg[0]);
else if (STREQ (arg, "^-") || STREQ (arg, "undef"))
value = _POSIX_VDISABLE;
else if (arg[0] == '^' && arg[1] != '\0') /* Ignore any trailing junk. */
{
if (arg[1] == '?')
value = 127;
else
value = to_uchar (arg[1]) & ~0140; /* Non-letters get weird results. */
}
else
value = integer_arg (arg, TYPE_MAXIMUM (cc_t));
mode->c_cc[info->offset] = value;
}
static void
set_speed (enum speed_setting type, const char *arg, struct termios *mode)
{
speed_t baud;
baud = string_to_baud (arg);
if (type == input_speed || type == both_speeds)
cfsetispeed (mode, baud);
if (type == output_speed || type == both_speeds)
cfsetospeed (mode, baud);
}
#ifdef TIOCGWINSZ
static int
get_win_size (int fd, struct winsize *win)
{
int err = ioctl (fd, TIOCGWINSZ, (char *) win);
return err;
}
static void
set_window_size (int rows, int cols, char const *device_name)
{
struct winsize win;
if (get_win_size (STDIN_FILENO, &win))
{
if (errno != EINVAL)
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
memset (&win, 0, sizeof (win));
}
if (rows >= 0)
win.ws_row = rows;
if (cols >= 0)
win.ws_col = cols;
# ifdef TIOCSSIZE
/* Alexander Dupuy wrote:
The following code deals with a bug in the SunOS 4.x (and 3.x?) kernel.
This comment from sys/ttold.h describes Sun's twisted logic - a better
test would have been (ts_lines > 64k || ts_cols > 64k || ts_cols == 0).
At any rate, the problem is gone in Solaris 2.x.
Unfortunately, the old TIOCSSIZE code does collide with TIOCSWINSZ,
but they can be disambiguated by checking whether a "struct ttysize"
structure's "ts_lines" field is greater than 64K or not. If so,
it's almost certainly a "struct winsize" instead.
At any rate, the bug manifests itself when ws_row == 0; the symptom is
that ws_row is set to ws_col, and ws_col is set to (ws_xpixel<<16)
+ ws_ypixel. Since GNU stty sets rows and columns separately, this bug
caused "stty rows 0 cols 0" to set rows to cols and cols to 0, while
"stty cols 0 rows 0" would do the right thing. On a little-endian
machine like the sun386i, the problem is the same, but for ws_col == 0.
The workaround is to do the ioctl once with row and col = 1 to set the
pixel info, and then do it again using a TIOCSSIZE to set rows/cols. */
if (win.ws_row == 0 || win.ws_col == 0)
{
struct ttysize ttysz;
ttysz.ts_lines = win.ws_row;
ttysz.ts_cols = win.ws_col;
win.ws_row = 1;
win.ws_col = 1;
if (ioctl (STDIN_FILENO, TIOCSWINSZ, (char *) &win))
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
if (ioctl (STDIN_FILENO, TIOCSSIZE, (char *) &ttysz))
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
return;
}
# endif
if (ioctl (STDIN_FILENO, TIOCSWINSZ, (char *) &win))
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
}
static void
display_window_size (bool fancy, char const *device_name)
{
struct winsize win;
if (get_win_size (STDIN_FILENO, &win))
{
if (errno != EINVAL)
error (EXIT_FAILURE, errno, "%s", quotef (device_name));
if (!fancy)
error (EXIT_FAILURE, 0,
_("%s: no size information for this device"),
quotef (device_name));
}
else
{
wrapf (fancy ? "rows %d; columns %d;" : "%d %d\n",
win.ws_row, win.ws_col);
if (!fancy)
current_col = 0;
}
}
#endif
static int
screen_columns (void)
{
#ifdef TIOCGWINSZ
struct winsize win;
/* With Solaris 2.[123], this ioctl fails and errno is set to
EINVAL for telnet (but not rlogin) sessions.
On ISC 3.0, it fails for the console and the serial port
(but it works for ptys).
It can also fail on any system when stdout isn't a tty.
In case of any failure, just use the default. */
if (get_win_size (STDOUT_FILENO, &win) == 0 && 0 < win.ws_col)
return win.ws_col;
#endif
{
/* Use $COLUMNS if it's in [1..INT_MAX]. */
char *col_string = getenv ("COLUMNS");
long int n_columns;
if (!(col_string != NULL
&& xstrtol (col_string, NULL, 0, &n_columns, "") == LONGINT_OK
&& 0 < n_columns
&& n_columns <= INT_MAX))
n_columns = 80;
return n_columns;
}
}
static tcflag_t * _GL_ATTRIBUTE_PURE
mode_type_flag (enum mode_type type, struct termios *mode)
{
switch (type)
{
case control:
return &mode->c_cflag;
case input:
return &mode->c_iflag;
case output:
return &mode->c_oflag;
case local:
return &mode->c_lflag;
case combination:
return NULL;
default:
abort ();
}
}
static void
display_settings (enum output_type output_type, struct termios *mode,
char const *device_name)
{
switch (output_type)
{
case changed:
display_changed (mode);
break;
case all:
display_all (mode, device_name);
break;
case recoverable:
display_recoverable (mode);
break;
}
}
static void
display_changed (struct termios *mode)
{
int i;
bool empty_line;
tcflag_t *bitsp;
unsigned long mask;
enum mode_type prev_type = control;
display_speed (mode, true);
#ifdef HAVE_C_LINE
wrapf ("line = %d;", mode->c_line);
#endif
putchar ('\n');
current_col = 0;
empty_line = true;
for (i = 0; !STREQ (control_info[i].name, "min"); ++i)
{
if (mode->c_cc[control_info[i].offset] == control_info[i].saneval)
continue;
#ifdef VFLUSHO
/* 'flush' is the deprecated equivalent of 'discard'. */
if (STREQ (control_info[i].name, "flush"))
continue;
#endif
/* If swtch is the same as susp, don't print both. */
#if VSWTCH == VSUSP
if (STREQ (control_info[i].name, "swtch"))
continue;
#endif
/* If eof uses the same slot as min, only print whichever applies. */
#if VEOF == VMIN
if ((mode->c_lflag & ICANON) == 0
&& (STREQ (control_info[i].name, "eof")
|| STREQ (control_info[i].name, "eol")))
continue;
#endif
empty_line = false;
wrapf ("%s = %s;", control_info[i].name,
visible (mode->c_cc[control_info[i].offset]));
}
if ((mode->c_lflag & ICANON) == 0)
{
wrapf ("min = %lu; time = %lu;\n",
(unsigned long int) mode->c_cc[VMIN],
(unsigned long int) mode->c_cc[VTIME]);
}
else if (!empty_line)
putchar ('\n');
current_col = 0;
empty_line = true;
for (i = 0; mode_info[i].name != NULL; ++i)
{
if (mode_info[i].flags & OMIT)
continue;
if (mode_info[i].type != prev_type)
{
if (!empty_line)
{
putchar ('\n');
current_col = 0;
empty_line = true;
}
prev_type = mode_info[i].type;
}
bitsp = mode_type_flag (mode_info[i].type, mode);
mask = mode_info[i].mask ? mode_info[i].mask : mode_info[i].bits;
/* bitsp would be NULL only for "combination" modes, yet those
are filtered out above via the OMIT flag. Tell static analysis
tools that it's ok to dereference bitsp here. */
assert (bitsp);
if ((*bitsp & mask) == mode_info[i].bits)
{
if (mode_info[i].flags & SANE_UNSET)
{
wrapf ("%s", mode_info[i].name);
empty_line = false;
}
}
else if ((mode_info[i].flags & (SANE_SET | REV)) == (SANE_SET | REV))
{
wrapf ("-%s", mode_info[i].name);
empty_line = false;
}
}
if (!empty_line)
putchar ('\n');
current_col = 0;
}
static void
display_all (struct termios *mode, char const *device_name)
{
int i;
tcflag_t *bitsp;
unsigned long mask;
enum mode_type prev_type = control;
display_speed (mode, true);
#ifdef TIOCGWINSZ
display_window_size (true, device_name);
#endif
#ifdef HAVE_C_LINE
wrapf ("line = %d;", mode->c_line);
#endif
putchar ('\n');
current_col = 0;
for (i = 0; ! STREQ (control_info[i].name, "min"); ++i)
{
#ifdef VFLUSHO
/* 'flush' is the deprecated equivalent of 'discard'. */
if (STREQ (control_info[i].name, "flush"))
continue;
#endif
/* If swtch is the same as susp, don't print both. */
#if VSWTCH == VSUSP
if (STREQ (control_info[i].name, "swtch"))
continue;
#endif
/* If eof uses the same slot as min, only print whichever applies. */
#if VEOF == VMIN
if ((mode->c_lflag & ICANON) == 0
&& (STREQ (control_info[i].name, "eof")
|| STREQ (control_info[i].name, "eol")))
continue;
#endif
wrapf ("%s = %s;", control_info[i].name,
visible (mode->c_cc[control_info[i].offset]));
}
#if VEOF == VMIN
if ((mode->c_lflag & ICANON) == 0)
#endif
wrapf ("min = %lu; time = %lu;",
(unsigned long int) mode->c_cc[VMIN],
(unsigned long int) mode->c_cc[VTIME]);
if (current_col != 0)
putchar ('\n');
current_col = 0;
for (i = 0; mode_info[i].name != NULL; ++i)
{
if (mode_info[i].flags & OMIT)
continue;
if (mode_info[i].type != prev_type)
{
putchar ('\n');
current_col = 0;
prev_type = mode_info[i].type;
}
bitsp = mode_type_flag (mode_info[i].type, mode);
mask = mode_info[i].mask ? mode_info[i].mask : mode_info[i].bits;
assert (bitsp); /* See the identical assertion and comment above. */
if ((*bitsp & mask) == mode_info[i].bits)
wrapf ("%s", mode_info[i].name);
else if (mode_info[i].flags & REV)
wrapf ("-%s", mode_info[i].name);
}
putchar ('\n');
current_col = 0;
}
static void
display_speed (struct termios *mode, bool fancy)
{
if (cfgetispeed (mode) == 0 || cfgetispeed (mode) == cfgetospeed (mode))
wrapf (fancy ? "speed %lu baud;" : "%lu\n",
baud_to_value (cfgetospeed (mode)));
else
wrapf (fancy ? "ispeed %lu baud; ospeed %lu baud;" : "%lu %lu\n",
baud_to_value (cfgetispeed (mode)),
baud_to_value (cfgetospeed (mode)));
if (!fancy)
current_col = 0;
}
static void
display_recoverable (struct termios *mode)
{
size_t i;
printf ("%lx:%lx:%lx:%lx",
(unsigned long int) mode->c_iflag,
(unsigned long int) mode->c_oflag,
(unsigned long int) mode->c_cflag,
(unsigned long int) mode->c_lflag);
for (i = 0; i < NCCS; ++i)
printf (":%lx", (unsigned long int) mode->c_cc[i]);
putchar ('\n');
}
/* NOTE: identical to below, modulo use of tcflag_t */
static int
strtoul_tcflag_t (char const *s, int base, char **p, tcflag_t *result,
char delim)
{
unsigned long ul;
errno = 0;
ul = strtoul (s, p, base);
if (errno || **p != delim || *p == s || (tcflag_t) ul != ul)
return -1;
*result = ul;
return 0;
}
/* NOTE: identical to above, modulo use of cc_t */
static int
strtoul_cc_t (char const *s, int base, char **p, cc_t *result, char delim)
{
unsigned long ul;
errno = 0;
ul = strtoul (s, p, base);
if (errno || **p != delim || *p == s || (cc_t) ul != ul)
return -1;
*result = ul;
return 0;
}
/* Parse the output of display_recoverable.
Return false if any part of it is invalid. */
static bool
recover_mode (char const *arg, struct termios *mode)
{
tcflag_t flag[4];
char const *s = arg;
size_t i;
for (i = 0; i < 4; i++)
{
char *p;
if (strtoul_tcflag_t (s, 16, &p, flag + i, ':') != 0)
return false;
s = p + 1;
}
mode->c_iflag = flag[0];
mode->c_oflag = flag[1];
mode->c_cflag = flag[2];
mode->c_lflag = flag[3];
for (i = 0; i < NCCS; ++i)
{
char *p;
char delim = i < NCCS - 1 ? ':' : '\0';
if (strtoul_cc_t (s, 16, &p, mode->c_cc + i, delim) != 0)
return false;
s = p + 1;
}
return true;
}
struct speed_map
{
const char *string; /* ASCII representation. */
speed_t speed; /* Internal form. */
unsigned long int value; /* Numeric value. */
};
static struct speed_map const speeds[] =
{
{"0", B0, 0},
{"50", B50, 50},
{"75", B75, 75},
{"110", B110, 110},
{"134", B134, 134},
{"134.5", B134, 134},
{"150", B150, 150},
{"200", B200, 200},
{"300", B300, 300},
{"600", B600, 600},
{"1200", B1200, 1200},
{"1800", B1800, 1800},
{"2400", B2400, 2400},
{"4800", B4800, 4800},
{"9600", B9600, 9600},
{"19200", B19200, 19200},
{"38400", B38400, 38400},
{"exta", B19200, 19200},
{"extb", B38400, 38400},
#ifdef B57600
{"57600", B57600, 57600},
#endif
#ifdef B115200
{"115200", B115200, 115200},
#endif
#ifdef B230400
{"230400", B230400, 230400},
#endif
#ifdef B460800
{"460800", B460800, 460800},
#endif
#ifdef B500000
{"500000", B500000, 500000},
#endif
#ifdef B576000
{"576000", B576000, 576000},
#endif
#ifdef B921600
{"921600", B921600, 921600},
#endif
#ifdef B1000000
{"1000000", B1000000, 1000000},
#endif
#ifdef B1152000
{"1152000", B1152000, 1152000},
#endif
#ifdef B1500000
{"1500000", B1500000, 1500000},
#endif
#ifdef B2000000
{"2000000", B2000000, 2000000},
#endif
#ifdef B2500000
{"2500000", B2500000, 2500000},
#endif
#ifdef B3000000
{"3000000", B3000000, 3000000},
#endif
#ifdef B3500000
{"3500000", B3500000, 3500000},
#endif
#ifdef B4000000
{"4000000", B4000000, 4000000},
#endif
{NULL, 0, 0}
};
static speed_t _GL_ATTRIBUTE_PURE
string_to_baud (const char *arg)
{
int i;
for (i = 0; speeds[i].string != NULL; ++i)
if (STREQ (arg, speeds[i].string))
return speeds[i].speed;
return (speed_t) -1;
}
static unsigned long int _GL_ATTRIBUTE_PURE
baud_to_value (speed_t speed)
{
int i;
for (i = 0; speeds[i].string != NULL; ++i)
if (speed == speeds[i].speed)
return speeds[i].value;
return 0;
}
static void
sane_mode (struct termios *mode)
{
int i;
tcflag_t *bitsp;
for (i = 0; control_info[i].name; ++i)
{
#if VMIN == VEOF
if (STREQ (control_info[i].name, "min"))
break;
#endif
mode->c_cc[control_info[i].offset] = control_info[i].saneval;
}
for (i = 0; mode_info[i].name != NULL; ++i)
{
if (mode_info[i].flags & NO_SETATTR)
continue;
if (mode_info[i].flags & SANE_SET)
{
bitsp = mode_type_flag (mode_info[i].type, mode);
*bitsp = (*bitsp & ~mode_info[i].mask) | mode_info[i].bits;
}
else if (mode_info[i].flags & SANE_UNSET)
{
bitsp = mode_type_flag (mode_info[i].type, mode);
*bitsp = *bitsp & ~mode_info[i].mask & ~mode_info[i].bits;
}
}
}
/* Return a string that is the printable representation of character CH. */
/* Adapted from 'cat' by Torbjorn Granlund. */
static const char *
visible (cc_t ch)
{
static char buf[10];
char *bpout = buf;
if (ch == _POSIX_VDISABLE)
return "";
if (ch >= 32)
{
if (ch < 127)
*bpout++ = ch;
else if (ch == 127)
{
*bpout++ = '^';
*bpout++ = '?';
}
else
{
*bpout++ = 'M';
*bpout++ = '-';
if (ch >= 128 + 32)
{
if (ch < 128 + 127)
*bpout++ = ch - 128;
else
{
*bpout++ = '^';
*bpout++ = '?';
}
}
else
{
*bpout++ = '^';
*bpout++ = ch - 128 + 64;
}
}
}
else
{
*bpout++ = '^';
*bpout++ = ch + 64;
}
*bpout = '\0';
return (const char *) buf;
}
/* Parse string S as an integer, using decimal radix by default,
but allowing octal and hex numbers as in C. Reject values
larger than MAXVAL. */
static unsigned long int
integer_arg (const char *s, unsigned long int maxval)
{
return xnumtoumax (s, 0, 0, maxval, "bB", _("invalid integer argument"), 0);
}