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Diffstat (limited to 'coreutils/stty.c')
-rw-r--r-- | coreutils/stty.c | 1439 |
1 files changed, 1439 insertions, 0 deletions
diff --git a/coreutils/stty.c b/coreutils/stty.c new file mode 100644 index 0000000..3605e3c --- /dev/null +++ b/coreutils/stty.c @@ -0,0 +1,1439 @@ +/* vi: set sw=4 ts=4: */ +/* stty -- change and print terminal line settings + Copyright (C) 1990-1999 Free Software Foundation, Inc. + + Licensed under the GPL v2 or later, see the file LICENSE in this tarball. +*/ +/* 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 + + */ + +#include "libbb.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 +/* 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 + +/* Which speeds to set */ +enum speed_setting { + input_speed, output_speed, both_speeds +}; + +/* Which member(s) of 'struct termios' a mode uses */ +enum { + /* Do NOT change the order or values, as mode_type_flag() + * depends on them */ + 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 */ + + +/* 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, +#ifdef IXANY + IDX_decctlq, +#endif +#if defined(TABDLY) || defined(OXTABS) + IDX_tabs, +#endif +#if defined(XCASE) && defined(IUCLC) && defined(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[] = + 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 ) +#ifdef IXANY + MI_ENTRY("decctlq", combination, REV | OMIT, 0, 0 ) +#endif +#if defined(TABDLY) || defined(OXTABS) + MI_ENTRY("tabs", combination, REV | OMIT, 0, 0 ) +#endif +#if defined(XCASE) && defined(IUCLC) && defined(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 ) +#ifdef 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, REV | OMIT, IXOFF, 0 ) +#ifdef IUCLC + MI_ENTRY("iuclc", input, SANE_UNSET | REV, IUCLC, 0 ) +#endif +#ifdef IXANY + MI_ENTRY("ixany", input, SANE_UNSET | REV, IXANY, 0 ) +#endif +#ifdef IMAXBEL + MI_ENTRY("imaxbel", input, SANE_SET | REV, IMAXBEL, 0 ) +#endif + MI_ENTRY("opost", output, SANE_SET | REV, OPOST, 0 ) +#ifdef OLCUC + MI_ENTRY("olcuc", output, SANE_UNSET | REV, OLCUC, 0 ) +#endif +#ifdef OCRNL + MI_ENTRY("ocrnl", output, SANE_UNSET | REV, OCRNL, 0 ) +#endif +#ifdef ONLCR + MI_ENTRY("onlcr", output, SANE_SET | REV, ONLCR, 0 ) +#endif +#ifdef ONOCR + MI_ENTRY("onocr", output, SANE_UNSET | REV, ONOCR, 0 ) +#endif +#ifdef ONLRET + MI_ENTRY("onlret", output, SANE_UNSET | REV, ONLRET, 0 ) +#endif +#ifdef OFILL + MI_ENTRY("ofill", output, SANE_UNSET | REV, OFILL, 0 ) +#endif +#ifdef OFDEL + MI_ENTRY("ofdel", output, SANE_UNSET | REV, OFDEL, 0 ) +#endif +#ifdef NLDLY + MI_ENTRY("nl1", output, SANE_UNSET, NL1, NLDLY) + MI_ENTRY("nl0", output, SANE_SET, NL0, NLDLY) +#endif +#ifdef 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 + +#ifdef TABDLY + MI_ENTRY("tab3", output, SANE_UNSET, TAB3, TABDLY) + MI_ENTRY("tab2", output, SANE_UNSET, TAB2, TABDLY) + MI_ENTRY("tab1", output, SANE_UNSET, TAB1, TABDLY) + MI_ENTRY("tab0", output, SANE_SET, TAB0, TABDLY) +#else +# ifdef OXTABS + MI_ENTRY("tab3", output, SANE_UNSET, OXTABS, 0 ) +# endif +#endif + +#ifdef BSDLY + MI_ENTRY("bs1", output, SANE_UNSET, BS1, BSDLY) + MI_ENTRY("bs0", output, SANE_SET, BS0, BSDLY) +#endif +#ifdef VTDLY + MI_ENTRY("vt1", output, SANE_UNSET, VT1, VTDLY) + MI_ENTRY("vt0", output, SANE_SET, VT0, VTDLY) +#endif +#ifdef 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 ) +#ifdef 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, REV | OMIT, 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 ) +#ifdef XCASE + MI_ENTRY("xcase", local, SANE_UNSET | REV, XCASE, 0 ) +#endif +#ifdef TOSTOP + MI_ENTRY("tostop", local, SANE_UNSET | REV, TOSTOP, 0 ) +#endif +#ifdef ECHOPRT + MI_ENTRY("echoprt", local, SANE_UNSET | REV, ECHOPRT, 0 ) + MI_ENTRY("prterase", local, REV | OMIT, ECHOPRT, 0 ) +#endif +#ifdef ECHOCTL + MI_ENTRY("echoctl", local, SANE_SET | REV, ECHOCTL, 0 ) + MI_ENTRY("ctlecho", local, REV | OMIT, ECHOCTL, 0 ) +#endif +#ifdef ECHOKE + MI_ENTRY("echoke", local, SANE_SET | REV, ECHOKE, 0 ) + MI_ENTRY("crtkill", local, REV | OMIT, 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 ) +#ifdef IXANY + MI_ENTRY("decctlq", combination, REV | OMIT, 0, 0 ) +#endif +#if defined(TABDLY) || defined(OXTABS) + MI_ENTRY("tabs", combination, REV | OMIT, 0, 0 ) +#endif +#if defined(XCASE) && defined(IUCLC) && defined(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 ) +#ifdef 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, REV | OMIT, IXOFF, 0 ) +#ifdef IUCLC + MI_ENTRY("iuclc", input, SANE_UNSET | REV, IUCLC, 0 ) +#endif +#ifdef IXANY + MI_ENTRY("ixany", input, SANE_UNSET | REV, IXANY, 0 ) +#endif +#ifdef IMAXBEL + MI_ENTRY("imaxbel", input, SANE_SET | REV, IMAXBEL, 0 ) +#endif + MI_ENTRY("opost", output, SANE_SET | REV, OPOST, 0 ) +#ifdef OLCUC + MI_ENTRY("olcuc", output, SANE_UNSET | REV, OLCUC, 0 ) +#endif +#ifdef OCRNL + MI_ENTRY("ocrnl", output, SANE_UNSET | REV, OCRNL, 0 ) +#endif +#ifdef ONLCR + MI_ENTRY("onlcr", output, SANE_SET | REV, ONLCR, 0 ) +#endif +#ifdef ONOCR + MI_ENTRY("onocr", output, SANE_UNSET | REV, ONOCR, 0 ) +#endif +#ifdef ONLRET + MI_ENTRY("onlret", output, SANE_UNSET | REV, ONLRET, 0 ) +#endif +#ifdef OFILL + MI_ENTRY("ofill", output, SANE_UNSET | REV, OFILL, 0 ) +#endif +#ifdef OFDEL + MI_ENTRY("ofdel", output, SANE_UNSET | REV, OFDEL, 0 ) +#endif +#ifdef NLDLY + MI_ENTRY("nl1", output, SANE_UNSET, NL1, NLDLY) + MI_ENTRY("nl0", output, SANE_SET, NL0, NLDLY) +#endif +#ifdef 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 + +#ifdef TABDLY + MI_ENTRY("tab3", output, SANE_UNSET, TAB3, TABDLY) + MI_ENTRY("tab2", output, SANE_UNSET, TAB2, TABDLY) + MI_ENTRY("tab1", output, SANE_UNSET, TAB1, TABDLY) + MI_ENTRY("tab0", output, SANE_SET, TAB0, TABDLY) +#else +# ifdef OXTABS + MI_ENTRY("tab3", output, SANE_UNSET, OXTABS, 0 ) +# endif +#endif + +#ifdef BSDLY + MI_ENTRY("bs1", output, SANE_UNSET, BS1, BSDLY) + MI_ENTRY("bs0", output, SANE_SET, BS0, BSDLY) +#endif +#ifdef VTDLY + MI_ENTRY("vt1", output, SANE_UNSET, VT1, VTDLY) + MI_ENTRY("vt0", output, SANE_SET, VT0, VTDLY) +#endif +#ifdef 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 ) +#ifdef 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, REV | OMIT, 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 ) +#ifdef XCASE + MI_ENTRY("xcase", local, SANE_UNSET | REV, XCASE, 0 ) +#endif +#ifdef TOSTOP + MI_ENTRY("tostop", local, SANE_UNSET | REV, TOSTOP, 0 ) +#endif +#ifdef ECHOPRT + MI_ENTRY("echoprt", local, SANE_UNSET | REV, ECHOPRT, 0 ) + MI_ENTRY("prterase", local, REV | OMIT, ECHOPRT, 0 ) +#endif +#ifdef ECHOCTL + MI_ENTRY("echoctl", local, SANE_SET | REV, ECHOCTL, 0 ) + MI_ENTRY("ctlecho", local, REV | OMIT, ECHOCTL, 0 ) +#endif +#ifdef ECHOKE + MI_ENTRY("echoke", local, SANE_SET | REV, ECHOKE, 0 ) + MI_ENTRY("crtkill", local, REV | OMIT, 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, +#ifdef VEOL2 + CIDX_eol2, +#endif +#ifdef VSWTCH + CIDX_swtch, +#endif + CIDX_start, + CIDX_stop, + CIDX_susp, +#ifdef VDSUSP + CIDX_dsusp, +#endif +#ifdef VREPRINT + CIDX_rprnt, +#endif +#ifdef VWERASE + CIDX_werase, +#endif +#ifdef VLNEXT + CIDX_lnext, +#endif +#ifdef VFLUSHO + CIDX_flush, +#endif +#ifdef 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[] = + 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 ) +#ifdef VEOL2 + CI_ENTRY("eol2", CEOL2, VEOL2 ) +#endif +#ifdef VSWTCH + CI_ENTRY("swtch", CSWTCH, VSWTCH ) +#endif + CI_ENTRY("start", CSTART, VSTART ) + CI_ENTRY("stop", CSTOP, VSTOP ) + CI_ENTRY("susp", CSUSP, VSUSP ) +#ifdef VDSUSP + CI_ENTRY("dsusp", CDSUSP, VDSUSP ) +#endif +#ifdef VREPRINT + CI_ENTRY("rprnt", CRPRNT, VREPRINT) +#endif +#ifdef VWERASE + CI_ENTRY("werase", CWERASE, VWERASE ) +#endif +#ifdef VLNEXT + CI_ENTRY("lnext", CLNEXT, VLNEXT ) +#endif +#ifdef VFLUSHO + CI_ENTRY("flush", CFLUSHO, VFLUSHO ) +#endif +#ifdef 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[] = { + /* 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 ) +#ifdef VEOL2 + CI_ENTRY("eol2", CEOL2, VEOL2 ) +#endif +#ifdef VSWTCH + CI_ENTRY("swtch", CSWTCH, VSWTCH ) +#endif + CI_ENTRY("start", CSTART, VSTART ) + CI_ENTRY("stop", CSTOP, VSTOP ) + CI_ENTRY("susp", CSUSP, VSUSP ) +#ifdef VDSUSP + CI_ENTRY("dsusp", CDSUSP, VDSUSP ) +#endif +#ifdef VREPRINT + CI_ENTRY("rprnt", CRPRNT, VREPRINT) +#endif +#ifdef VWERASE + CI_ENTRY("werase", CWERASE, VWERASE ) +#endif +#ifdef VLNEXT + CI_ENTRY("lnext", CLNEXT, VLNEXT ) +#endif +#ifdef VFLUSHO + CI_ENTRY("flush", CFLUSHO, VFLUSHO ) +#endif +#ifdef 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; // = bb_msg_standard_input; + /* The width of the screen, for output wrapping */ + unsigned max_col; // = 80; + /* Current position, to know when to wrap */ + unsigned current_col; + char buf[10]; +}; +#define G (*(struct globals*)&bb_common_bufsiz1) +#define INIT_G() do { \ + G.device_name = bb_msg_standard_input; \ + G.max_col = 80; \ +} while (0) + + +/* Return a string that is the printable representation of character CH */ +/* Adapted from 'cat' by Torbjorn Granlund */ +static const char *visible(unsigned ch) +{ + char *bpout = G.buf; + + if (ch == _POSIX_VDISABLE) + return "<undef>"; + + if (ch >= 128) { + ch -= 128; + *bpout++ = 'M'; + *bpout++ = '-'; + } + + if (ch < 32) { + *bpout++ = '^'; + *bpout++ = ch + 64; + } else if (ch < 127) { + *bpout++ = ch; + } else { + *bpout++ = '^'; + *bpout++ = '?'; + } + + *bpout = '\0'; + return G.buf; +} + +static tcflag_t *mode_type_flag(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; +} + +static void set_speed_or_die(enum speed_setting type, const char *const arg, + struct termios * const 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 set_window_size(const int rows, const 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"); +} + +static void display_window_size(const 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 %d; columns %d;" : "%d %d\n", + height, width); + } +} + +static const struct suffix_mult stty_suffixes[] = { + { "b", 512 }, + { "k", 1024 }, + { "B", 1024 }, + { } +}; + +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 *const 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; + + ospeed = ispeed = cfgetispeed(mode); + if (ispeed == 0 || ispeed == (ospeed = cfgetospeed(mode))) { + 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, const 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 HAVE_C_LINE + wrapf("line = %d;\n", mode->c_line); +#else + wrapf("\n"); +#endif + + for (i = 0; i != CIDX_min; ++i) { + /* 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) == 0 + && (i == CIDX_eof || i == CIDX_eol) + ) { + continue; + } +#endif + wrapf("%s = %s;", nth_string(control_name, i), + visible(mode->c_cc[control_info[i].offset])); + } +#if VEOF == VMIN + if ((mode->c_lflag & ICANON) == 0) +#endif + wrapf("min = %d; time = %d;", mode->c_cc[VMIN], mode->c_cc[VTIME]); + if (G.current_col) wrapf("\n"); + + for (i = 0; i < NUM_mode_info; ++i) { + if (mode_info[i].flags & OMIT) + continue; + if (mode_info[i].type != prev_type) { + /* wrapf("\n"); */ + if (G.current_col) wrapf("\n"); + 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; + 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)); + } + } + } + if (G.current_col) wrapf("\n"); +} + +static void sane_mode(struct termios *mode) +{ + int i; + tcflag_t *bitsp; + + 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) { + if (mode_info[i].flags & SANE_SET) { + bitsp = mode_type_flag(mode_info[i].type, mode); + *bitsp = (*bitsp & ~((unsigned long)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 & ~((unsigned long)mode_info[i].mask) + & ~mode_info[i].bits; + } + } +} + +/* Save set_mode from #ifdef forest plague */ +#ifndef ONLCR +#define ONLCR 0 +#endif +#ifndef OCRNL +#define OCRNL 0 +#endif +#ifndef ONLRET +#define ONLRET 0 +#endif +#ifndef XCASE +#define XCASE 0 +#endif +#ifndef IXANY +#define IXANY 0 +#endif +#ifndef TABDLY +#define TABDLY 0 +#endif +#ifndef OXTABS +#define OXTABS 0 +#endif +#ifndef IUCLC +#define IUCLC 0 +#endif +#ifndef OLCUC +#define OLCUC 0 +#endif +#ifndef ECHOCTL +#define ECHOCTL 0 +#endif +#ifndef ECHOKE +#define ECHOKE 0 +#endif + +static void set_mode(const struct mode_info *info, int reversed, + struct termios *mode) +{ + tcflag_t *bitsp; + + bitsp = mode_type_flag(info->type, mode); + + if (bitsp) { + if (reversed) + *bitsp = *bitsp & ~info->mask & ~info->bits; + else + *bitsp = (*bitsp & ~info->mask) | info->bits; + return; + } + + /* 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; + } + } + else if (IXANY && info == &mode_info[IDX_decctlq]) { + if (reversed) + mode->c_iflag |= IXANY; + else + mode->c_iflag &= ~IXANY; + } + else if (TABDLY && info == &mode_info[IDX_tabs]) { + if (reversed) + mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3; + else + mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0; + } + else if (OXTABS && info == &mode_info[IDX_tabs]) { + if (reversed) + mode->c_oflag |= OXTABS; + else + mode->c_oflag &= ~OXTABS; + } else + if (XCASE && IUCLC && OLCUC + && (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; + } + } 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, "^-") || !strcmp(arg, "undef")) + 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, char **argv) +{ + struct termios mode; + void (*output_func)(const struct termios *, const 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] */ + --argc; + 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 HAVE_C_LINE + 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("verbose and stty-readable output styles are mutually exclusive"); + /* Specifying -a or -g with non-options is an error */ + if (!(stty_state & STTY_noargs) && + (stty_state & (STTY_verbose_output | STTY_recoverable_output))) + bb_error_msg_and_die("modes may not be set when specifying an output style"); + + /* Now it is safe to start doing things */ + if (file_name) { + int fd, fdflags; + G.device_name = file_name; + fd = xopen(G.device_name, O_RDONLY | O_NONBLOCK); + if (fd != STDIN_FILENO) { + dup2(fd, STDIN_FILENO); + close(fd); + } + fdflags = fcntl(STDIN_FILENO, F_GETFL); + if (fdflags < 0 || + fcntl(STDIN_FILENO, F_SETFL, fdflags & ~O_NONBLOCK) < 0) + perror_on_device_and_die("%s: cannot reset non-blocking mode"); + } + + /* 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)) { + get_terminal_width_height(STDOUT_FILENO, &G.max_col, NULL); + 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 HAVE_C_LINE + case param_line: + mode.c_line = xatoul_sfx(argnext, stty_suffixes); + stty_state |= STTY_require_set_attr; + break; +#endif +#ifdef TIOCGWINSZ + case param_cols: + 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) { +#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 ((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; +} |