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busybox/coreutils/stty.c
Denys Vlasenko 692eeb81a4 stty: make in NOEXEC 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 20:07:19 +02:00

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/* vi: set sw=4 ts=4: */
/* stty -- change and print terminal line settings
Copyright (C) 1990-1999 Free Software Foundation, Inc.
Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* Usage: stty [-ag] [-F device] [setting...]
Options:
-a Write all current settings to stdout in human-readable form.
-g Write all current settings to stdout in stty-readable form.
-F 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 <djm@gnu.ai.mit.edu>
Special for busybox ported by Vladimir Oleynik <dzo@simtreas.ru> 2001
*/
//config:config STTY
//config: bool "stty (8.6 kb)"
//config: default y
//config: help
//config: stty is used to change and print terminal line settings.
//applet:IF_STTY(APPLET_NOEXEC(stty, stty, BB_DIR_BIN, BB_SUID_DROP, stty))
//kbuild:lib-$(CONFIG_STTY) += stty.o
//usage:#define stty_trivial_usage
//usage: "[-a|g] [-F DEVICE] [SETTING]..."
//usage:#define stty_full_usage "\n\n"
//usage: "Without arguments, prints baud rate, line discipline,\n"
//usage: "and deviations from stty sane\n"
//usage: "\n -F DEVICE Open device instead of stdin"
//usage: "\n -a Print all current settings in human-readable form"
//usage: "\n -g Print in stty-readable form"
//usage: "\n [SETTING] See manpage"
#include "libbb.h"
#include "common_bufsiz.h"
#ifndef _POSIX_VDISABLE
# define _POSIX_VDISABLE ((unsigned char) 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
/* glibc-2.12.1 uses only VSWTC name */
#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
# define CSWTCH CSUSP
#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(__sparc__) && defined(__svr4__)
# 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(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
/* Save us from #ifdef forest plague */
#ifndef BSDLY
# define BSDLY 0
#endif
#ifndef CIBAUD
# define CIBAUD 0
#endif
#ifndef CRDLY
# define CRDLY 0
#endif
#ifndef CRTSCTS
# define CRTSCTS 0
#endif
#ifndef ECHOCTL
# define ECHOCTL 0
#endif
#ifndef ECHOKE
# define ECHOKE 0
#endif
#ifndef ECHOPRT
# define ECHOPRT 0
#endif
#ifndef FFDLY
# define FFDLY 0
#endif
#ifndef IEXTEN
# define IEXTEN 0
#endif
#ifndef IMAXBEL
# define IMAXBEL 0
#endif
#ifndef IUCLC
# define IUCLC 0
#endif
#ifndef IXANY
# define IXANY 0
#endif
#ifndef NLDLY
# define NLDLY 0
#endif
#ifndef OCRNL
# define OCRNL 0
#endif
#ifndef OFDEL
# define OFDEL 0
#endif
#ifndef OFILL
# define OFILL 0
#endif
#ifndef OLCUC
# define OLCUC 0
#endif
#ifndef ONLCR
# define ONLCR 0
#endif
#ifndef ONLRET
# define ONLRET 0
#endif
#ifndef ONOCR
# define ONOCR 0
#endif
#ifndef OXTABS
# define OXTABS 0
#endif
#ifndef TABDLY
# define TABDLY 0
#endif
#ifndef TAB1
# define TAB1 0
#endif
#ifndef TAB2
# define TAB2 0
#endif
#ifndef TOSTOP
# define TOSTOP 0
#endif
#ifndef VDSUSP
# define VDSUSP 0
#endif
#ifndef VEOL2
# define VEOL2 0
#endif
#ifndef VFLUSHO
# define VFLUSHO 0
#endif
#ifndef VLNEXT
# define VLNEXT 0
#endif
#ifndef VREPRINT
# define VREPRINT 0
#endif
#ifndef VSTATUS
# define VSTATUS 0
#endif
#ifndef VSWTCH
# define VSWTCH 0
#endif
#ifndef VTDLY
# define VTDLY 0
#endif
#ifndef VWERASE
# define VWERASE 0
#endif
#ifndef XCASE
# define XCASE 0
#endif
#ifndef IUTF8
# define IUTF8 0
#endif
/* Which speeds to set */
enum speed_setting {
input_speed, output_speed, both_speeds
};
/* Which member(s) of 'struct termios' a mode uses */
enum {
control, input, output, local, combination
};
static tcflag_t *get_ptr_to_tcflag(unsigned type, const struct termios *mode)
{
static const uint8_t tcflag_offsets[] ALIGN1 = {
offsetof(struct termios, c_cflag), /* control */
offsetof(struct termios, c_iflag), /* input */
offsetof(struct termios, c_oflag), /* output */
offsetof(struct termios, c_lflag) /* local */
};
if (type <= local) {
return (tcflag_t*) (((char*)mode) + tcflag_offsets[type]);
}
return NULL;
}
/* 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 */
/* Each mode.
* This structure should be kept as small as humanly possible.
*/
struct mode_info {
const uint8_t type; /* Which structure element to change */
const uint8_t flags; /* Setting and display options */
/* only these values are ever used, so... */
#if (CSIZE | NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY) < 0x100
const uint8_t mask;
#elif (CSIZE | NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY) < 0x10000
const uint16_t mask;
#else
const tcflag_t mask; /* Other bits to turn off for this mode */
#endif
/* was using short here, but ppc32 was unhappy */
const tcflag_t bits; /* Bits to set for this mode */
};
enum {
/* Must match mode_name[] and mode_info[] order! */
IDX_evenp = 0,
IDX_parity,
IDX_oddp,
IDX_nl,
IDX_ek,
IDX_sane,
IDX_cooked,
IDX_raw,
IDX_pass8,
IDX_litout,
IDX_cbreak,
IDX_crt,
IDX_dec,
#if IXANY
IDX_decctlq,
#endif
#if TABDLY || OXTABS
IDX_tabs,
#endif
#if XCASE && IUCLC && OLCUC
IDX_lcase,
IDX_LCASE,
#endif
};
#define MI_ENTRY(N,T,F,B,M) N "\0"
/* Mode names given on command line */
static const char mode_name[] ALIGN1 =
MI_ENTRY("evenp", combination, REV | OMIT, 0, 0 )
MI_ENTRY("parity", combination, REV | OMIT, 0, 0 )
MI_ENTRY("oddp", combination, REV | OMIT, 0, 0 )
MI_ENTRY("nl", combination, REV | OMIT, 0, 0 )
MI_ENTRY("ek", combination, OMIT, 0, 0 )
MI_ENTRY("sane", combination, OMIT, 0, 0 )
MI_ENTRY("cooked", combination, REV | OMIT, 0, 0 )
MI_ENTRY("raw", combination, REV | OMIT, 0, 0 )
MI_ENTRY("pass8", combination, REV | OMIT, 0, 0 )
MI_ENTRY("litout", combination, REV | OMIT, 0, 0 )
MI_ENTRY("cbreak", combination, REV | OMIT, 0, 0 )
MI_ENTRY("crt", combination, OMIT, 0, 0 )
MI_ENTRY("dec", combination, OMIT, 0, 0 )
#if IXANY
MI_ENTRY("decctlq", combination, REV | OMIT, 0, 0 )
#endif
#if TABDLY || OXTABS
MI_ENTRY("tabs", combination, REV | OMIT, 0, 0 )
#endif
#if XCASE && IUCLC && OLCUC
MI_ENTRY("lcase", combination, REV | OMIT, 0, 0 )
MI_ENTRY("LCASE", combination, REV | OMIT, 0, 0 )
#endif
MI_ENTRY("parenb", control, REV, PARENB, 0 )
MI_ENTRY("parodd", control, REV, PARODD, 0 )
MI_ENTRY("cs5", control, 0, CS5, CSIZE)
MI_ENTRY("cs6", control, 0, CS6, CSIZE)
MI_ENTRY("cs7", control, 0, CS7, CSIZE)
MI_ENTRY("cs8", control, 0, CS8, CSIZE)
MI_ENTRY("hupcl", control, REV, HUPCL, 0 )
MI_ENTRY("hup", control, REV | OMIT, HUPCL, 0 )
MI_ENTRY("cstopb", control, REV, CSTOPB, 0 )
MI_ENTRY("cread", control, SANE_SET | REV, CREAD, 0 )
MI_ENTRY("clocal", control, REV, CLOCAL, 0 )
#if CRTSCTS
MI_ENTRY("crtscts", control, REV, CRTSCTS, 0 )
#endif
MI_ENTRY("ignbrk", input, SANE_UNSET | REV, IGNBRK, 0 )
MI_ENTRY("brkint", input, SANE_SET | REV, BRKINT, 0 )
MI_ENTRY("ignpar", input, REV, IGNPAR, 0 )
MI_ENTRY("parmrk", input, REV, PARMRK, 0 )
MI_ENTRY("inpck", input, REV, INPCK, 0 )
MI_ENTRY("istrip", input, REV, ISTRIP, 0 )
MI_ENTRY("inlcr", input, SANE_UNSET | REV, INLCR, 0 )
MI_ENTRY("igncr", input, SANE_UNSET | REV, IGNCR, 0 )
MI_ENTRY("icrnl", input, SANE_SET | REV, ICRNL, 0 )
MI_ENTRY("ixon", input, REV, IXON, 0 )
MI_ENTRY("ixoff", input, SANE_UNSET | REV, IXOFF, 0 )
MI_ENTRY("tandem", input, OMIT | REV, IXOFF, 0 )
#if IUCLC
MI_ENTRY("iuclc", input, SANE_UNSET | REV, IUCLC, 0 )
#endif
#if IXANY
MI_ENTRY("ixany", input, SANE_UNSET | REV, IXANY, 0 )
#endif
#if IMAXBEL
MI_ENTRY("imaxbel", input, SANE_SET | REV, IMAXBEL, 0 )
#endif
#if IUTF8
MI_ENTRY("iutf8", input, SANE_UNSET | REV, IUTF8, 0 )
#endif
MI_ENTRY("opost", output, SANE_SET | REV, OPOST, 0 )
#if OLCUC
MI_ENTRY("olcuc", output, SANE_UNSET | REV, OLCUC, 0 )
#endif
#if OCRNL
MI_ENTRY("ocrnl", output, SANE_UNSET | REV, OCRNL, 0 )
#endif
#if ONLCR
MI_ENTRY("onlcr", output, SANE_SET | REV, ONLCR, 0 )
#endif
#if ONOCR
MI_ENTRY("onocr", output, SANE_UNSET | REV, ONOCR, 0 )
#endif
#if ONLRET
MI_ENTRY("onlret", output, SANE_UNSET | REV, ONLRET, 0 )
#endif
#if OFILL
MI_ENTRY("ofill", output, SANE_UNSET | REV, OFILL, 0 )
#endif
#if OFDEL
MI_ENTRY("ofdel", output, SANE_UNSET | REV, OFDEL, 0 )
#endif
#if NLDLY
MI_ENTRY("nl1", output, SANE_UNSET, NL1, NLDLY)
MI_ENTRY("nl0", output, SANE_SET, NL0, NLDLY)
#endif
#if CRDLY
MI_ENTRY("cr3", output, SANE_UNSET, CR3, CRDLY)
MI_ENTRY("cr2", output, SANE_UNSET, CR2, CRDLY)
MI_ENTRY("cr1", output, SANE_UNSET, CR1, CRDLY)
MI_ENTRY("cr0", output, SANE_SET, CR0, CRDLY)
#endif
#if TABDLY
MI_ENTRY("tab3", output, SANE_UNSET, TAB3, TABDLY)
# if TAB2
MI_ENTRY("tab2", output, SANE_UNSET, TAB2, TABDLY)
# endif
# if TAB1
MI_ENTRY("tab1", output, SANE_UNSET, TAB1, TABDLY)
# endif
MI_ENTRY("tab0", output, SANE_SET, TAB0, TABDLY)
#else
# if OXTABS
MI_ENTRY("tab3", output, SANE_UNSET, OXTABS, 0 )
# endif
#endif
#if BSDLY
MI_ENTRY("bs1", output, SANE_UNSET, BS1, BSDLY)
MI_ENTRY("bs0", output, SANE_SET, BS0, BSDLY)
#endif
#if VTDLY
MI_ENTRY("vt1", output, SANE_UNSET, VT1, VTDLY)
MI_ENTRY("vt0", output, SANE_SET, VT0, VTDLY)
#endif
#if FFDLY
MI_ENTRY("ff1", output, SANE_UNSET, FF1, FFDLY)
MI_ENTRY("ff0", output, SANE_SET, FF0, FFDLY)
#endif
MI_ENTRY("isig", local, SANE_SET | REV, ISIG, 0 )
MI_ENTRY("icanon", local, SANE_SET | REV, ICANON, 0 )
#if IEXTEN
MI_ENTRY("iexten", local, SANE_SET | REV, IEXTEN, 0 )
#endif
MI_ENTRY("echo", local, SANE_SET | REV, ECHO, 0 )
MI_ENTRY("echoe", local, SANE_SET | REV, ECHOE, 0 )
MI_ENTRY("crterase", local, OMIT | REV, ECHOE, 0 )
MI_ENTRY("echok", local, SANE_SET | REV, ECHOK, 0 )
MI_ENTRY("echonl", local, SANE_UNSET | REV, ECHONL, 0 )
MI_ENTRY("noflsh", local, SANE_UNSET | REV, NOFLSH, 0 )
#if XCASE
MI_ENTRY("xcase", local, SANE_UNSET | REV, XCASE, 0 )
#endif
#if TOSTOP
MI_ENTRY("tostop", local, SANE_UNSET | REV, TOSTOP, 0 )
#endif
#if ECHOPRT
MI_ENTRY("echoprt", local, SANE_UNSET | REV, ECHOPRT, 0 )
MI_ENTRY("prterase", local, OMIT | REV, ECHOPRT, 0 )
#endif
#if ECHOCTL
MI_ENTRY("echoctl", local, SANE_SET | REV, ECHOCTL, 0 )
MI_ENTRY("ctlecho", local, OMIT | REV, ECHOCTL, 0 )
#endif
#if ECHOKE
MI_ENTRY("echoke", local, SANE_SET | REV, ECHOKE, 0 )
MI_ENTRY("crtkill", local, OMIT | REV, ECHOKE, 0 )
#endif
;
#undef MI_ENTRY
#define MI_ENTRY(N,T,F,B,M) { T, F, M, B },
static const struct mode_info mode_info[] = {
/* This should be verbatim cut-n-paste copy of the above MI_ENTRYs */
MI_ENTRY("evenp", combination, REV | OMIT, 0, 0 )
MI_ENTRY("parity", combination, REV | OMIT, 0, 0 )
MI_ENTRY("oddp", combination, REV | OMIT, 0, 0 )
MI_ENTRY("nl", combination, REV | OMIT, 0, 0 )
MI_ENTRY("ek", combination, OMIT, 0, 0 )
MI_ENTRY("sane", combination, OMIT, 0, 0 )
MI_ENTRY("cooked", combination, REV | OMIT, 0, 0 )
MI_ENTRY("raw", combination, REV | OMIT, 0, 0 )
MI_ENTRY("pass8", combination, REV | OMIT, 0, 0 )
MI_ENTRY("litout", combination, REV | OMIT, 0, 0 )
MI_ENTRY("cbreak", combination, REV | OMIT, 0, 0 )
MI_ENTRY("crt", combination, OMIT, 0, 0 )
MI_ENTRY("dec", combination, OMIT, 0, 0 )
#if IXANY
MI_ENTRY("decctlq", combination, REV | OMIT, 0, 0 )
#endif
#if TABDLY || OXTABS
MI_ENTRY("tabs", combination, REV | OMIT, 0, 0 )
#endif
#if XCASE && IUCLC && OLCUC
MI_ENTRY("lcase", combination, REV | OMIT, 0, 0 )
MI_ENTRY("LCASE", combination, REV | OMIT, 0, 0 )
#endif
MI_ENTRY("parenb", control, REV, PARENB, 0 )
MI_ENTRY("parodd", control, REV, PARODD, 0 )
MI_ENTRY("cs5", control, 0, CS5, CSIZE)
MI_ENTRY("cs6", control, 0, CS6, CSIZE)
MI_ENTRY("cs7", control, 0, CS7, CSIZE)
MI_ENTRY("cs8", control, 0, CS8, CSIZE)
MI_ENTRY("hupcl", control, REV, HUPCL, 0 )
MI_ENTRY("hup", control, REV | OMIT, HUPCL, 0 )
MI_ENTRY("cstopb", control, REV, CSTOPB, 0 )
MI_ENTRY("cread", control, SANE_SET | REV, CREAD, 0 )
MI_ENTRY("clocal", control, REV, CLOCAL, 0 )
#if CRTSCTS
MI_ENTRY("crtscts", control, REV, CRTSCTS, 0 )
#endif
MI_ENTRY("ignbrk", input, SANE_UNSET | REV, IGNBRK, 0 )
MI_ENTRY("brkint", input, SANE_SET | REV, BRKINT, 0 )
MI_ENTRY("ignpar", input, REV, IGNPAR, 0 )
MI_ENTRY("parmrk", input, REV, PARMRK, 0 )
MI_ENTRY("inpck", input, REV, INPCK, 0 )
MI_ENTRY("istrip", input, REV, ISTRIP, 0 )
MI_ENTRY("inlcr", input, SANE_UNSET | REV, INLCR, 0 )
MI_ENTRY("igncr", input, SANE_UNSET | REV, IGNCR, 0 )
MI_ENTRY("icrnl", input, SANE_SET | REV, ICRNL, 0 )
MI_ENTRY("ixon", input, REV, IXON, 0 )
MI_ENTRY("ixoff", input, SANE_UNSET | REV, IXOFF, 0 )
MI_ENTRY("tandem", input, OMIT | REV, IXOFF, 0 )
#if IUCLC
MI_ENTRY("iuclc", input, SANE_UNSET | REV, IUCLC, 0 )
#endif
#if IXANY
MI_ENTRY("ixany", input, SANE_UNSET | REV, IXANY, 0 )
#endif
#if IMAXBEL
MI_ENTRY("imaxbel", input, SANE_SET | REV, IMAXBEL, 0 )
#endif
#if IUTF8
MI_ENTRY("iutf8", input, SANE_UNSET | REV, IUTF8, 0 )
#endif
MI_ENTRY("opost", output, SANE_SET | REV, OPOST, 0 )
#if OLCUC
MI_ENTRY("olcuc", output, SANE_UNSET | REV, OLCUC, 0 )
#endif
#if OCRNL
MI_ENTRY("ocrnl", output, SANE_UNSET | REV, OCRNL, 0 )
#endif
#if ONLCR
MI_ENTRY("onlcr", output, SANE_SET | REV, ONLCR, 0 )
#endif
#if ONOCR
MI_ENTRY("onocr", output, SANE_UNSET | REV, ONOCR, 0 )
#endif
#if ONLRET
MI_ENTRY("onlret", output, SANE_UNSET | REV, ONLRET, 0 )
#endif
#if OFILL
MI_ENTRY("ofill", output, SANE_UNSET | REV, OFILL, 0 )
#endif
#if OFDEL
MI_ENTRY("ofdel", output, SANE_UNSET | REV, OFDEL, 0 )
#endif
#if NLDLY
MI_ENTRY("nl1", output, SANE_UNSET, NL1, NLDLY)
MI_ENTRY("nl0", output, SANE_SET, NL0, NLDLY)
#endif
#if CRDLY
MI_ENTRY("cr3", output, SANE_UNSET, CR3, CRDLY)
MI_ENTRY("cr2", output, SANE_UNSET, CR2, CRDLY)
MI_ENTRY("cr1", output, SANE_UNSET, CR1, CRDLY)
MI_ENTRY("cr0", output, SANE_SET, CR0, CRDLY)
#endif
#if TABDLY
MI_ENTRY("tab3", output, SANE_UNSET, TAB3, TABDLY)
# if TAB2
MI_ENTRY("tab2", output, SANE_UNSET, TAB2, TABDLY)
# endif
# if TAB1
MI_ENTRY("tab1", output, SANE_UNSET, TAB1, TABDLY)
# endif
MI_ENTRY("tab0", output, SANE_SET, TAB0, TABDLY)
#else
# if OXTABS
MI_ENTRY("tab3", output, SANE_UNSET, OXTABS, 0 )
# endif
#endif
#if BSDLY
MI_ENTRY("bs1", output, SANE_UNSET, BS1, BSDLY)
MI_ENTRY("bs0", output, SANE_SET, BS0, BSDLY)
#endif
#if VTDLY
MI_ENTRY("vt1", output, SANE_UNSET, VT1, VTDLY)
MI_ENTRY("vt0", output, SANE_SET, VT0, VTDLY)
#endif
#if FFDLY
MI_ENTRY("ff1", output, SANE_UNSET, FF1, FFDLY)
MI_ENTRY("ff0", output, SANE_SET, FF0, FFDLY)
#endif
MI_ENTRY("isig", local, SANE_SET | REV, ISIG, 0 )
MI_ENTRY("icanon", local, SANE_SET | REV, ICANON, 0 )
#if IEXTEN
MI_ENTRY("iexten", local, SANE_SET | REV, IEXTEN, 0 )
#endif
MI_ENTRY("echo", local, SANE_SET | REV, ECHO, 0 )
MI_ENTRY("echoe", local, SANE_SET | REV, ECHOE, 0 )
MI_ENTRY("crterase", local, OMIT | REV, ECHOE, 0 )
MI_ENTRY("echok", local, SANE_SET | REV, ECHOK, 0 )
MI_ENTRY("echonl", local, SANE_UNSET | REV, ECHONL, 0 )
MI_ENTRY("noflsh", local, SANE_UNSET | REV, NOFLSH, 0 )
#if XCASE
MI_ENTRY("xcase", local, SANE_UNSET | REV, XCASE, 0 )
#endif
#if TOSTOP
MI_ENTRY("tostop", local, SANE_UNSET | REV, TOSTOP, 0 )
#endif
#if ECHOPRT
MI_ENTRY("echoprt", local, SANE_UNSET | REV, ECHOPRT, 0 )
MI_ENTRY("prterase", local, OMIT | REV, ECHOPRT, 0 )
#endif
#if ECHOCTL
MI_ENTRY("echoctl", local, SANE_SET | REV, ECHOCTL, 0 )
MI_ENTRY("ctlecho", local, OMIT | REV, ECHOCTL, 0 )
#endif
#if ECHOKE
MI_ENTRY("echoke", local, SANE_SET | REV, ECHOKE, 0 )
MI_ENTRY("crtkill", local, OMIT | REV, ECHOKE, 0 )
#endif
};
enum {
NUM_mode_info = ARRAY_SIZE(mode_info)
};
/* Control characters */
struct control_info {
const uint8_t saneval; /* Value to set for 'stty sane' */
const uint8_t offset; /* Offset in c_cc */
};
enum {
/* Must match control_name[] and control_info[] order! */
CIDX_intr = 0,
CIDX_quit,
CIDX_erase,
CIDX_kill,
CIDX_eof,
CIDX_eol,
#if VEOL2
CIDX_eol2,
#endif
#if VSWTCH
CIDX_swtch,
#endif
CIDX_start,
CIDX_stop,
CIDX_susp,
#if VDSUSP
CIDX_dsusp,
#endif
#if VREPRINT
CIDX_rprnt,
#endif
#if VWERASE
CIDX_werase,
#endif
#if VLNEXT
CIDX_lnext,
#endif
#if VFLUSHO
CIDX_flush,
#endif
#if VSTATUS
CIDX_status,
#endif
CIDX_min,
CIDX_time,
};
#define CI_ENTRY(n,s,o) n "\0"
/* Name given on command line */
static const char control_name[] ALIGN1 =
CI_ENTRY("intr", CINTR, VINTR )
CI_ENTRY("quit", CQUIT, VQUIT )
CI_ENTRY("erase", CERASE, VERASE )
CI_ENTRY("kill", CKILL, VKILL )
CI_ENTRY("eof", CEOF, VEOF )
CI_ENTRY("eol", CEOL, VEOL )
#if VEOL2
CI_ENTRY("eol2", CEOL2, VEOL2 )
#endif
#if VSWTCH
CI_ENTRY("swtch", CSWTCH, VSWTCH )
#endif
CI_ENTRY("start", CSTART, VSTART )
CI_ENTRY("stop", CSTOP, VSTOP )
CI_ENTRY("susp", CSUSP, VSUSP )
#if VDSUSP
CI_ENTRY("dsusp", CDSUSP, VDSUSP )
#endif
#if VREPRINT
CI_ENTRY("rprnt", CRPRNT, VREPRINT)
#endif
#if VWERASE
CI_ENTRY("werase", CWERASE, VWERASE )
#endif
#if VLNEXT
CI_ENTRY("lnext", CLNEXT, VLNEXT )
#endif
#if VFLUSHO
CI_ENTRY("flush", CFLUSHO, VFLUSHO )
#endif
#if VSTATUS
CI_ENTRY("status", CSTATUS, VSTATUS )
#endif
/* These must be last because of the display routines */
CI_ENTRY("min", 1, VMIN )
CI_ENTRY("time", 0, VTIME )
;
#undef CI_ENTRY
#define CI_ENTRY(n,s,o) { s, o },
static const struct control_info control_info[] ALIGN2 = {
/* This should be verbatim cut-n-paste copy of the above CI_ENTRYs */
CI_ENTRY("intr", CINTR, VINTR )
CI_ENTRY("quit", CQUIT, VQUIT )
CI_ENTRY("erase", CERASE, VERASE )
CI_ENTRY("kill", CKILL, VKILL )
CI_ENTRY("eof", CEOF, VEOF )
CI_ENTRY("eol", CEOL, VEOL )
#if VEOL2
CI_ENTRY("eol2", CEOL2, VEOL2 )
#endif
#if VSWTCH
CI_ENTRY("swtch", CSWTCH, VSWTCH )
#endif
CI_ENTRY("start", CSTART, VSTART )
CI_ENTRY("stop", CSTOP, VSTOP )
CI_ENTRY("susp", CSUSP, VSUSP )
#if VDSUSP
CI_ENTRY("dsusp", CDSUSP, VDSUSP )
#endif
#if VREPRINT
CI_ENTRY("rprnt", CRPRNT, VREPRINT)
#endif
#if VWERASE
CI_ENTRY("werase", CWERASE, VWERASE )
#endif
#if VLNEXT
CI_ENTRY("lnext", CLNEXT, VLNEXT )
#endif
#if VFLUSHO
CI_ENTRY("flush", CFLUSHO, VFLUSHO )
#endif
#if VSTATUS
CI_ENTRY("status", CSTATUS, VSTATUS )
#endif
/* These must be last because of the display routines */
CI_ENTRY("min", 1, VMIN )
CI_ENTRY("time", 0, VTIME )
};
enum {
NUM_control_info = ARRAY_SIZE(control_info)
};
struct globals {
const char *device_name;
/* The width of the screen, for output wrapping */
unsigned max_col;
/* Current position, to know when to wrap */
unsigned current_col;
char buf[10];
} FIX_ALIASING;
#define G (*(struct globals*)bb_common_bufsiz1)
#define INIT_G() do { \
G.device_name = bb_msg_standard_input; \
G.max_col = 80; \
} while (0)
static void set_speed_or_die(enum speed_setting type, const char *arg,
struct termios *mode)
{
speed_t baud;
baud = tty_value_to_baud(xatou(arg));
if (type != output_speed) { /* either input or both */
cfsetispeed(mode, baud);
}
if (type != input_speed) { /* either output or both */
cfsetospeed(mode, baud);
}
}
static NORETURN void perror_on_device_and_die(const char *fmt)
{
bb_perror_msg_and_die(fmt, G.device_name);
}
static void perror_on_device(const char *fmt)
{
bb_perror_msg(fmt, G.device_name);
}
/* 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, ...)
{
char buf[128];
va_list args;
unsigned buflen;
va_start(args, message);
buflen = vsnprintf(buf, sizeof(buf), message, args);
va_end(args);
/* We seem to be called only with suitable lengths, but check if
somebody failed to adhere to this assumption just to be sure. */
if (!buflen || buflen >= sizeof(buf)) return;
if (G.current_col > 0) {
G.current_col++;
if (buf[0] != '\n') {
if (G.current_col + buflen >= G.max_col) {
bb_putchar('\n');
G.current_col = 0;
} else
bb_putchar(' ');
}
}
fputs(buf, stdout);
G.current_col += buflen;
if (buf[buflen-1] == '\n')
G.current_col = 0;
}
static void newline(void)
{
if (G.current_col != 0)
wrapf("\n");
}
#ifdef TIOCGWINSZ
static void set_window_size(int rows, int cols)
{
struct winsize win = { 0, 0, 0, 0 };
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win)) {
if (errno != EINVAL) {
goto bail;
}
memset(&win, 0, sizeof(win));
}
if (rows >= 0)
win.ws_row = rows;
if (cols >= 0)
win.ws_col = cols;
if (ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win))
bail:
perror_on_device("%s");
}
#endif
static void display_window_size(int fancy)
{
const char *fmt_str = "%s\0%s: no size information for this device";
unsigned width, height;
if (get_terminal_width_height(STDIN_FILENO, &width, &height)) {
if ((errno != EINVAL) || ((fmt_str += 2), !fancy)) {
perror_on_device(fmt_str);
}
} else {
wrapf(fancy ? "rows %u; columns %u;" : "%u %u\n",
height, width);
}
}
static const struct suffix_mult stty_suffixes[] = {
{ "b", 512 },
{ "k", 1024 },
{ "B", 1024 },
{ "", 0 }
};
static const struct mode_info *find_mode(const char *name)
{
int i = index_in_strings(mode_name, name);
return i >= 0 ? &mode_info[i] : NULL;
}
static const struct control_info *find_control(const char *name)
{
int i = index_in_strings(control_name, name);
return i >= 0 ? &control_info[i] : NULL;
}
enum {
param_need_arg = 0x80,
param_line = 1 | 0x80,
param_rows = 2 | 0x80,
param_cols = 3 | 0x80,
param_columns = 4 | 0x80,
param_size = 5,
param_speed = 6,
param_ispeed = 7 | 0x80,
param_ospeed = 8 | 0x80,
};
static int find_param(const char *name)
{
static const char params[] ALIGN1 =
"line\0" /* 1 */
"rows\0" /* 2 */
"cols\0" /* 3 */
"columns\0" /* 4 */
"size\0" /* 5 */
"speed\0" /* 6 */
"ispeed\0"
"ospeed\0";
int i = index_in_strings(params, name) + 1;
if (i == 0)
return 0;
if (i != 5 && i != 6)
i |= 0x80;
return i;
}
static int recover_mode(const char *arg, struct termios *mode)
{
int i, n;
unsigned chr;
unsigned long iflag, oflag, cflag, lflag;
/* Scan into temporaries since it is too much trouble to figure out
the right format for 'tcflag_t' */
if (sscanf(arg, "%lx:%lx:%lx:%lx%n",
&iflag, &oflag, &cflag, &lflag, &n) != 4)
return 0;
mode->c_iflag = iflag;
mode->c_oflag = oflag;
mode->c_cflag = cflag;
mode->c_lflag = lflag;
arg += n;
for (i = 0; i < NCCS; ++i) {
if (sscanf(arg, ":%x%n", &chr, &n) != 1)
return 0;
mode->c_cc[i] = chr;
arg += n;
}
/* Fail if there are too many fields */
if (*arg != '\0')
return 0;
return 1;
}
static void display_recoverable(const struct termios *mode,
int UNUSED_PARAM dummy)
{
int i;
printf("%lx:%lx:%lx:%lx",
(unsigned long) mode->c_iflag, (unsigned long) mode->c_oflag,
(unsigned long) mode->c_cflag, (unsigned long) mode->c_lflag);
for (i = 0; i < NCCS; ++i)
printf(":%x", (unsigned int) mode->c_cc[i]);
bb_putchar('\n');
}
static void display_speed(const struct termios *mode, int fancy)
{
//____________________ 01234567 8 9
const char *fmt_str = "%lu %lu\n\0ispeed %lu baud; ospeed %lu baud;";
unsigned long ispeed, ospeed;
ispeed = cfgetispeed(mode);
ospeed = cfgetospeed(mode);
if (ispeed == 0 || ispeed == ospeed) {
ispeed = ospeed; /* in case ispeed was 0 */
//________ 0123 4 5 6 7 8 9
fmt_str = "%lu\n\0\0\0\0\0speed %lu baud;";
}
if (fancy) fmt_str += 9;
wrapf(fmt_str, tty_baud_to_value(ispeed), tty_baud_to_value(ospeed));
}
static void do_display(const struct termios *mode, int all)
{
int i;
tcflag_t *bitsp;
unsigned long mask;
int prev_type = control;
display_speed(mode, 1);
if (all)
display_window_size(1);
#ifdef __linux__
wrapf("line = %u;\n", mode->c_line);
#else
newline();
#endif
for (i = 0; i != CIDX_min; ++i) {
char ch;
/* If swtch is the same as susp, don't print both */
#if VSWTCH == VSUSP
if (i == CIDX_swtch)
continue;
#endif
/* If eof uses the same slot as min, only print whichever applies */
#if VEOF == VMIN
if (!(mode->c_lflag & ICANON)
&& (i == CIDX_eof || i == CIDX_eol)
) {
continue;
}
#endif
ch = mode->c_cc[control_info[i].offset];
if (ch == _POSIX_VDISABLE)
strcpy(G.buf, "<undef>");
else
visible(ch, G.buf, 0);
wrapf("%s = %s;", nth_string(control_name, i), G.buf);
}
#if VEOF == VMIN
if ((mode->c_lflag & ICANON) == 0)
#endif
wrapf("min = %u; time = %u;", mode->c_cc[VMIN], mode->c_cc[VTIME]);
newline();
for (i = 0; i < NUM_mode_info; ++i) {
if (mode_info[i].flags & OMIT)
continue;
if (mode_info[i].type != prev_type) {
newline();
prev_type = mode_info[i].type;
}
bitsp = get_ptr_to_tcflag(mode_info[i].type, mode);
mask = mode_info[i].mask ? mode_info[i].mask : mode_info[i].bits;
if ((*bitsp & mask) == mode_info[i].bits) {
if (all || (mode_info[i].flags & SANE_UNSET))
wrapf("-%s"+1, nth_string(mode_name, i));
} else {
if ((all && mode_info[i].flags & REV)
|| (!all && (mode_info[i].flags & (SANE_SET | REV)) == (SANE_SET | REV))
) {
wrapf("-%s", nth_string(mode_name, i));
}
}
}
newline();
}
static void sane_mode(struct termios *mode)
{
int i;
for (i = 0; i < NUM_control_info; ++i) {
#if VMIN == VEOF
if (i == CIDX_min)
break;
#endif
mode->c_cc[control_info[i].offset] = control_info[i].saneval;
}
for (i = 0; i < NUM_mode_info; ++i) {
tcflag_t val;
tcflag_t *bitsp = get_ptr_to_tcflag(mode_info[i].type, mode);
if (!bitsp)
continue;
val = *bitsp & ~((unsigned long)mode_info[i].mask);
if (mode_info[i].flags & SANE_SET) {
*bitsp = val | mode_info[i].bits;
} else
if (mode_info[i].flags & SANE_UNSET) {
*bitsp = val & ~mode_info[i].bits;
}
}
}
static void set_mode(const struct mode_info *info, int reversed,
struct termios *mode)
{
tcflag_t *bitsp;
bitsp = get_ptr_to_tcflag(info->type, mode);
if (bitsp) {
tcflag_t val = *bitsp & ~info->mask;
if (reversed)
*bitsp = val & ~info->bits;
else
*bitsp = val | info->bits;
return;
}
/* !bitsp - it's a "combination" mode */
if (info == &mode_info[IDX_evenp] || info == &mode_info[IDX_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 (info == &mode_info[IDX_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 (info == &mode_info[IDX_nl]) {
if (reversed) {
mode->c_iflag = (mode->c_iflag | ICRNL) & ~INLCR & ~IGNCR;
mode->c_oflag = (mode->c_oflag | ONLCR) & ~OCRNL & ~ONLRET;
} else {
mode->c_iflag = mode->c_iflag & ~ICRNL;
if (ONLCR) mode->c_oflag = mode->c_oflag & ~ONLCR;
}
} else if (info == &mode_info[IDX_ek]) {
mode->c_cc[VERASE] = CERASE;
mode->c_cc[VKILL] = CKILL;
} else if (info == &mode_info[IDX_sane]) {
sane_mode(mode);
} else if (info == &mode_info[IDX_cbreak]) {
if (reversed)
mode->c_lflag |= ICANON;
else
mode->c_lflag &= ~ICANON;
} else if (info == &mode_info[IDX_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 (info == &mode_info[IDX_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 (info == &mode_info[IDX_raw] || info == &mode_info[IDX_cooked]) {
if ((info == &mode_info[IDX_raw] && reversed)
|| (info == &mode_info[IDX_cooked] && !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 | XCASE);
mode->c_cc[VMIN] = 1;
mode->c_cc[VTIME] = 0;
}
}
#if IXANY
else if (info == &mode_info[IDX_decctlq]) {
if (reversed)
mode->c_iflag |= IXANY;
else
mode->c_iflag &= ~IXANY;
}
#endif
#if TABDLY
else if (info == &mode_info[IDX_tabs]) {
if (reversed)
mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3;
else
mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0;
}
#endif
#if OXTABS
else if (info == &mode_info[IDX_tabs]) {
if (reversed)
mode->c_oflag |= OXTABS;
else
mode->c_oflag &= ~OXTABS;
}
#endif
#if XCASE && IUCLC && OLCUC
else if (info==&mode_info[IDX_lcase] || info==&mode_info[IDX_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 (info == &mode_info[IDX_crt]) {
mode->c_lflag |= ECHOE | ECHOCTL | ECHOKE;
} else if (info == &mode_info[IDX_dec]) {
mode->c_cc[VINTR] = 3; /* ^C */
mode->c_cc[VERASE] = 127; /* DEL */
mode->c_cc[VKILL] = 21; /* ^U */
mode->c_lflag |= ECHOE | ECHOCTL | ECHOKE;
if (IXANY) mode->c_iflag &= ~IXANY;
}
}
static void set_control_char_or_die(const struct control_info *info,
const char *arg, struct termios *mode)
{
unsigned char value;
if (info == &control_info[CIDX_min] || info == &control_info[CIDX_time])
value = xatoul_range_sfx(arg, 0, 0xff, stty_suffixes);
else if (arg[0] == '\0' || arg[1] == '\0')
value = arg[0];
else if (strcmp(arg, "^-") == 0 || strcmp(arg, "undef") == 0)
value = _POSIX_VDISABLE;
else if (arg[0] == '^') { /* Ignore any trailing junk (^Cjunk) */
value = arg[1] & 0x1f; /* Non-letters get weird results */
if (arg[1] == '?')
value = 127;
} else
value = xatoul_range_sfx(arg, 0, 0xff, stty_suffixes);
mode->c_cc[info->offset] = value;
}
#define STTY_require_set_attr (1 << 0)
#define STTY_speed_was_set (1 << 1)
#define STTY_verbose_output (1 << 2)
#define STTY_recoverable_output (1 << 3)
#define STTY_noargs (1 << 4)
int stty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int stty_main(int argc UNUSED_PARAM, char **argv)
{
struct termios mode;
void (*output_func)(const struct termios *, int);
const char *file_name = NULL;
int display_all = 0;
int stty_state;
int k;
INIT_G();
stty_state = STTY_noargs;
output_func = do_display;
/* First pass: only parse/verify command line params */
k = 0;
while (argv[++k]) {
const struct mode_info *mp;
const struct control_info *cp;
const char *arg = argv[k];
const char *argnext = argv[k+1];
int param;
if (arg[0] == '-') {
int i;
mp = find_mode(arg+1);
if (mp) {
if (!(mp->flags & REV))
goto invalid_argument;
stty_state &= ~STTY_noargs;
continue;
}
/* It is an option - parse it */
i = 0;
while (arg[++i]) {
switch (arg[i]) {
case 'a':
stty_state |= STTY_verbose_output;
output_func = do_display;
display_all = 1;
break;
case 'g':
stty_state |= STTY_recoverable_output;
output_func = display_recoverable;
break;
case 'F':
if (file_name)
bb_error_msg_and_die("only one device may be specified");
file_name = &arg[i+1]; /* "-Fdevice" ? */
if (!file_name[0]) { /* nope, "-F device" */
int p = k+1; /* argv[p] is argnext */
file_name = argnext;
if (!file_name)
bb_error_msg_and_die(bb_msg_requires_arg, "-F");
/* remove -F param from arg[vc] */
while (argv[p]) {
argv[p] = argv[p+1];
++p;
}
}
goto end_option;
default:
goto invalid_argument;
}
}
end_option:
continue;
}
mp = find_mode(arg);
if (mp) {
stty_state &= ~STTY_noargs;
continue;
}
cp = find_control(arg);
if (cp) {
if (!argnext)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
/* called for the side effect of xfunc death only */
set_control_char_or_die(cp, argnext, &mode);
stty_state &= ~STTY_noargs;
++k;
continue;
}
param = find_param(arg);
if (param & param_need_arg) {
if (!argnext)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
++k;
}
switch (param) {
#ifdef __linux__
case param_line:
# ifndef TIOCGWINSZ
xatoul_range_sfx(argnext, 1, INT_MAX, stty_suffixes);
break;
# endif /* else fall-through */
#endif
#ifdef TIOCGWINSZ
case param_rows:
case param_cols:
case param_columns:
xatoul_range_sfx(argnext, 1, INT_MAX, stty_suffixes);
break;
case param_size:
#endif
case param_speed:
break;
case param_ispeed:
/* called for the side effect of xfunc death only */
set_speed_or_die(input_speed, argnext, &mode);
break;
case param_ospeed:
/* called for the side effect of xfunc death only */
set_speed_or_die(output_speed, argnext, &mode);
break;
default:
if (recover_mode(arg, &mode) == 1) break;
if (tty_value_to_baud(xatou(arg)) != (speed_t) -1) break;
invalid_argument:
bb_error_msg_and_die("invalid argument '%s'", arg);
}
stty_state &= ~STTY_noargs;
}
/* Specifying both -a and -g is an error */
if ((stty_state & (STTY_verbose_output | STTY_recoverable_output)) ==
(STTY_verbose_output | STTY_recoverable_output)
) {
bb_error_msg_and_die("-a and -g are mutually exclusive");
}
/* Specifying -a or -g with non-options is an error */
if ((stty_state & (STTY_verbose_output | STTY_recoverable_output))
&& !(stty_state & STTY_noargs)
) {
bb_error_msg_and_die("modes may not be set when -a or -g is used");
}
/* Now it is safe to start doing things */
if (file_name) {
G.device_name = file_name;
xmove_fd(xopen_nonblocking(G.device_name), STDIN_FILENO);
ndelay_off(STDIN_FILENO);
}
/* Initialize to all zeroes so there is no risk memcmp will report a
spurious difference in an uninitialized portion of the structure */
memset(&mode, 0, sizeof(mode));
if (tcgetattr(STDIN_FILENO, &mode))
perror_on_device_and_die("%s");
if (stty_state & (STTY_verbose_output | STTY_recoverable_output | STTY_noargs)) {
G.max_col = get_terminal_width(STDOUT_FILENO);
output_func(&mode, display_all);
return EXIT_SUCCESS;
}
/* Second pass: perform actions */
k = 0;
while (argv[++k]) {
const struct mode_info *mp;
const struct control_info *cp;
const char *arg = argv[k];
const char *argnext = argv[k+1];
int param;
if (arg[0] == '-') {
mp = find_mode(arg+1);
if (mp) {
set_mode(mp, 1 /* reversed */, &mode);
stty_state |= STTY_require_set_attr;
}
/* It is an option - already parsed. Skip it */
continue;
}
mp = find_mode(arg);
if (mp) {
set_mode(mp, 0 /* non-reversed */, &mode);
stty_state |= STTY_require_set_attr;
continue;
}
cp = find_control(arg);
if (cp) {
++k;
set_control_char_or_die(cp, argnext, &mode);
stty_state |= STTY_require_set_attr;
continue;
}
param = find_param(arg);
if (param & param_need_arg) {
++k;
}
switch (param) {
#ifdef __linux__
case param_line:
mode.c_line = xatoul_sfx(argnext, stty_suffixes);
stty_state |= STTY_require_set_attr;
break;
#endif
#ifdef TIOCGWINSZ
case param_cols:
case param_columns:
set_window_size(-1, xatoul_sfx(argnext, stty_suffixes));
break;
case param_size:
display_window_size(0);
break;
case param_rows:
set_window_size(xatoul_sfx(argnext, stty_suffixes), -1);
break;
#endif
case param_speed:
display_speed(&mode, 0);
break;
case param_ispeed:
set_speed_or_die(input_speed, argnext, &mode);
stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
break;
case param_ospeed:
set_speed_or_die(output_speed, argnext, &mode);
stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
break;
default:
if (recover_mode(arg, &mode) == 1)
stty_state |= STTY_require_set_attr;
else /* true: if (tty_value_to_baud(xatou(arg)) != (speed_t) -1) */{
set_speed_or_die(both_speeds, arg, &mode);
stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
} /* else - impossible (caught in the first pass):
bb_error_msg_and_die("invalid argument '%s'", arg); */
}
}
if (stty_state & STTY_require_set_attr) {
struct termios new_mode;
if (tcsetattr(STDIN_FILENO, TCSADRAIN, &mode))
perror_on_device_and_die("%s");
/* 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 */
/* Initialize to all zeroes so there is no risk memcmp will report a
spurious difference in an uninitialized portion of the structure */
memset(&new_mode, 0, sizeof(new_mode));
if (tcgetattr(STDIN_FILENO, &new_mode))
perror_on_device_and_die("%s");
if (memcmp(&mode, &new_mode, sizeof(mode)) != 0) {
/*
* I think the below chunk is not necessary on Linux.
* If you are deleting it, also delete STTY_speed_was_set bit -
* it is only ever checked here.
*/
#if 0 /* was "if 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 ((stty_state & STTY_speed_was_set)
|| memcmp(&mode, &new_mode, sizeof(mode)) != 0)
#endif
perror_on_device_and_die("%s: cannot perform all requested operations");
}
}
return EXIT_SUCCESS;
}
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