[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /* stty -- change and print terminal line settings
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| 3 | Copyright (C) 1990-1999 Free Software Foundation, Inc.
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| 4 |
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| 5 | Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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| 6 | */
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| 7 | /* Usage: stty [-ag] [-F device] [setting...]
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| 8 |
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| 9 | Options:
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| 10 | -a Write all current settings to stdout in human-readable form.
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| 11 | -g Write all current settings to stdout in stty-readable form.
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| 12 | -F Open and use the specified device instead of stdin
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| 13 |
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| 14 | If no args are given, write to stdout the baud rate and settings that
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| 15 | have been changed from their defaults. Mode reading and changes
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| 16 | are done on the specified device, or stdin if none was specified.
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| 17 |
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| 18 | David MacKenzie <djm@gnu.ai.mit.edu>
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| 19 |
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| 20 | Special for busybox ported by Vladimir Oleynik <dzo@simtreas.ru> 2001
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| 21 |
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| 22 | */
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| 23 |
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[1765] | 24 | #include "libbb.h"
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[821] | 25 |
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| 26 | #ifndef _POSIX_VDISABLE
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| 27 | # define _POSIX_VDISABLE ((unsigned char) 0)
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| 28 | #endif
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| 29 |
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| 30 | #define Control(c) ((c) & 0x1f)
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[1765] | 31 | /* Canonical values for control characters */
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[821] | 32 | #ifndef CINTR
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[1765] | 33 | # define CINTR Control('c')
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[821] | 34 | #endif
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| 35 | #ifndef CQUIT
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| 36 | # define CQUIT 28
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| 37 | #endif
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| 38 | #ifndef CERASE
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| 39 | # define CERASE 127
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| 40 | #endif
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| 41 | #ifndef CKILL
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[1765] | 42 | # define CKILL Control('u')
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[821] | 43 | #endif
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| 44 | #ifndef CEOF
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[1765] | 45 | # define CEOF Control('d')
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[821] | 46 | #endif
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| 47 | #ifndef CEOL
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| 48 | # define CEOL _POSIX_VDISABLE
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| 49 | #endif
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| 50 | #ifndef CSTART
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[1765] | 51 | # define CSTART Control('q')
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[821] | 52 | #endif
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| 53 | #ifndef CSTOP
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[1765] | 54 | # define CSTOP Control('s')
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[821] | 55 | #endif
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| 56 | #ifndef CSUSP
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[1765] | 57 | # define CSUSP Control('z')
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[821] | 58 | #endif
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| 59 | #if defined(VEOL2) && !defined(CEOL2)
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| 60 | # define CEOL2 _POSIX_VDISABLE
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| 61 | #endif
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[1765] | 62 | /* ISC renamed swtch to susp for termios, but we'll accept either name */
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[821] | 63 | #if defined(VSUSP) && !defined(VSWTCH)
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| 64 | # define VSWTCH VSUSP
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| 65 | # define CSWTCH CSUSP
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| 66 | #endif
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| 67 | #if defined(VSWTCH) && !defined(CSWTCH)
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| 68 | # define CSWTCH _POSIX_VDISABLE
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| 69 | #endif
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| 70 |
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[1765] | 71 | /* SunOS 5.3 loses (^Z doesn't work) if 'swtch' is the same as 'susp'.
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| 72 | So the default is to disable 'swtch.' */
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| 73 | #if defined(__sparc__) && defined(__svr4__)
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[821] | 74 | # undef CSWTCH
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| 75 | # define CSWTCH _POSIX_VDISABLE
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| 76 | #endif
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| 77 |
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[1765] | 78 | #if defined(VWERSE) && !defined(VWERASE) /* AIX-3.2.5 */
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[821] | 79 | # define VWERASE VWERSE
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| 80 | #endif
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[1765] | 81 | #if defined(VDSUSP) && !defined(CDSUSP)
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| 82 | # define CDSUSP Control('y')
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[821] | 83 | #endif
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| 84 | #if !defined(VREPRINT) && defined(VRPRNT) /* Irix 4.0.5 */
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| 85 | # define VREPRINT VRPRNT
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| 86 | #endif
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| 87 | #if defined(VREPRINT) && !defined(CRPRNT)
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[1765] | 88 | # define CRPRNT Control('r')
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[821] | 89 | #endif
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| 90 | #if defined(VWERASE) && !defined(CWERASE)
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[1765] | 91 | # define CWERASE Control('w')
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[821] | 92 | #endif
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| 93 | #if defined(VLNEXT) && !defined(CLNEXT)
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[1765] | 94 | # define CLNEXT Control('v')
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[821] | 95 | #endif
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| 96 | #if defined(VDISCARD) && !defined(VFLUSHO)
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| 97 | # define VFLUSHO VDISCARD
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| 98 | #endif
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| 99 | #if defined(VFLUSH) && !defined(VFLUSHO) /* Ultrix 4.2 */
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| 100 | # define VFLUSHO VFLUSH
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| 101 | #endif
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| 102 | #if defined(CTLECH) && !defined(ECHOCTL) /* Ultrix 4.3 */
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| 103 | # define ECHOCTL CTLECH
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| 104 | #endif
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| 105 | #if defined(TCTLECH) && !defined(ECHOCTL) /* Ultrix 4.2 */
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| 106 | # define ECHOCTL TCTLECH
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| 107 | #endif
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| 108 | #if defined(CRTKIL) && !defined(ECHOKE) /* Ultrix 4.2 and 4.3 */
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| 109 | # define ECHOKE CRTKIL
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| 110 | #endif
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| 111 | #if defined(VFLUSHO) && !defined(CFLUSHO)
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[1765] | 112 | # define CFLUSHO Control('o')
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[821] | 113 | #endif
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| 114 | #if defined(VSTATUS) && !defined(CSTATUS)
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[1765] | 115 | # define CSTATUS Control('t')
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[821] | 116 | #endif
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| 117 |
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[1765] | 118 | /* Which speeds to set */
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[821] | 119 | enum speed_setting {
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| 120 | input_speed, output_speed, both_speeds
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| 121 | };
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| 122 |
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[1765] | 123 | /* Which member(s) of 'struct termios' a mode uses */
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| 124 | enum {
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[821] | 125 | /* Do NOT change the order or values, as mode_type_flag()
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[1765] | 126 | * depends on them */
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[821] | 127 | control, input, output, local, combination
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| 128 | };
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| 129 |
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[1765] | 130 | static const char evenp [] ALIGN1 = "evenp";
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| 131 | static const char raw [] ALIGN1 = "raw";
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| 132 | static const char stty_min [] ALIGN1 = "min";
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| 133 | static const char stty_time [] ALIGN1 = "time";
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| 134 | static const char stty_swtch[] ALIGN1 = "swtch";
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| 135 | static const char stty_eol [] ALIGN1 = "eol";
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| 136 | static const char stty_eof [] ALIGN1 = "eof";
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| 137 | static const char parity [] ALIGN1 = "parity";
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| 138 | static const char stty_oddp [] ALIGN1 = "oddp";
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| 139 | static const char stty_nl [] ALIGN1 = "nl";
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| 140 | static const char stty_ek [] ALIGN1 = "ek";
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| 141 | static const char stty_sane [] ALIGN1 = "sane";
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| 142 | static const char cbreak [] ALIGN1 = "cbreak";
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| 143 | static const char stty_pass8[] ALIGN1 = "pass8";
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| 144 | static const char litout [] ALIGN1 = "litout";
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| 145 | static const char cooked [] ALIGN1 = "cooked";
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| 146 | static const char decctlq [] ALIGN1 = "decctlq";
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| 147 | static const char stty_tabs [] ALIGN1 = "tabs";
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| 148 | static const char stty_lcase[] ALIGN1 = "lcase";
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| 149 | static const char stty_LCASE[] ALIGN1 = "LCASE";
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| 150 | static const char stty_crt [] ALIGN1 = "crt";
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| 151 | static const char stty_dec [] ALIGN1 = "dec";
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[821] | 152 |
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[1765] | 153 | /* Flags for 'struct mode_info' */
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| 154 | #define SANE_SET 1 /* Set in 'sane' mode */
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| 155 | #define SANE_UNSET 2 /* Unset in 'sane' mode */
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| 156 | #define REV 4 /* Can be turned off by prepending '-' */
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| 157 | #define OMIT 8 /* Don't display value */
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[821] | 158 |
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[1765] | 159 | /* Each mode */
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[821] | 160 | struct mode_info {
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[1765] | 161 | const char *const name; /* Name given on command line */
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| 162 | const unsigned char type; /* Which structure element to change */
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| 163 | const unsigned char flags; /* Setting and display options */
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| 164 | /* were using short here, but ppc32 was unhappy: */
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| 165 | const tcflag_t mask; /* Other bits to turn off for this mode */
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| 166 | const tcflag_t bits; /* Bits to set for this mode */
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[821] | 167 | };
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| 168 |
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[1765] | 169 | /* We can optimize it further by using name[8] instead of char *name */
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| 170 | /* but beware of "if (info->name == evenp)" checks! */
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| 171 | /* Need to replace them with "if (info == &mode_info[EVENP_INDX])" */
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| 172 |
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[821] | 173 | #define MI_ENTRY(N,T,F,B,M) { N, T, F, M, B }
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| 174 |
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[1765] | 175 | static const struct mode_info mode_info[] = {
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[821] | 176 | MI_ENTRY("parenb", control, REV, PARENB, 0 ),
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| 177 | MI_ENTRY("parodd", control, REV, PARODD, 0 ),
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| 178 | MI_ENTRY("cs5", control, 0, CS5, CSIZE),
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| 179 | MI_ENTRY("cs6", control, 0, CS6, CSIZE),
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| 180 | MI_ENTRY("cs7", control, 0, CS7, CSIZE),
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| 181 | MI_ENTRY("cs8", control, 0, CS8, CSIZE),
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| 182 | MI_ENTRY("hupcl", control, REV, HUPCL, 0 ),
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| 183 | MI_ENTRY("hup", control, REV | OMIT, HUPCL, 0 ),
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| 184 | MI_ENTRY("cstopb", control, REV, CSTOPB, 0 ),
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| 185 | MI_ENTRY("cread", control, SANE_SET | REV, CREAD, 0 ),
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| 186 | MI_ENTRY("clocal", control, REV, CLOCAL, 0 ),
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| 187 | #ifdef CRTSCTS
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| 188 | MI_ENTRY("crtscts", control, REV, CRTSCTS, 0 ),
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| 189 | #endif
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| 190 | MI_ENTRY("ignbrk", input, SANE_UNSET | REV, IGNBRK, 0 ),
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| 191 | MI_ENTRY("brkint", input, SANE_SET | REV, BRKINT, 0 ),
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| 192 | MI_ENTRY("ignpar", input, REV, IGNPAR, 0 ),
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| 193 | MI_ENTRY("parmrk", input, REV, PARMRK, 0 ),
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| 194 | MI_ENTRY("inpck", input, REV, INPCK, 0 ),
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| 195 | MI_ENTRY("istrip", input, REV, ISTRIP, 0 ),
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| 196 | MI_ENTRY("inlcr", input, SANE_UNSET | REV, INLCR, 0 ),
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| 197 | MI_ENTRY("igncr", input, SANE_UNSET | REV, IGNCR, 0 ),
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| 198 | MI_ENTRY("icrnl", input, SANE_SET | REV, ICRNL, 0 ),
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| 199 | MI_ENTRY("ixon", input, REV, IXON, 0 ),
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| 200 | MI_ENTRY("ixoff", input, SANE_UNSET | REV, IXOFF, 0 ),
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| 201 | MI_ENTRY("tandem", input, REV | OMIT, IXOFF, 0 ),
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| 202 | #ifdef IUCLC
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| 203 | MI_ENTRY("iuclc", input, SANE_UNSET | REV, IUCLC, 0 ),
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| 204 | #endif
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| 205 | #ifdef IXANY
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| 206 | MI_ENTRY("ixany", input, SANE_UNSET | REV, IXANY, 0 ),
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| 207 | #endif
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| 208 | #ifdef IMAXBEL
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| 209 | MI_ENTRY("imaxbel", input, SANE_SET | REV, IMAXBEL, 0 ),
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| 210 | #endif
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| 211 | MI_ENTRY("opost", output, SANE_SET | REV, OPOST, 0 ),
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| 212 | #ifdef OLCUC
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| 213 | MI_ENTRY("olcuc", output, SANE_UNSET | REV, OLCUC, 0 ),
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| 214 | #endif
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| 215 | #ifdef OCRNL
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| 216 | MI_ENTRY("ocrnl", output, SANE_UNSET | REV, OCRNL, 0 ),
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| 217 | #endif
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| 218 | #ifdef ONLCR
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| 219 | MI_ENTRY("onlcr", output, SANE_SET | REV, ONLCR, 0 ),
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| 220 | #endif
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| 221 | #ifdef ONOCR
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| 222 | MI_ENTRY("onocr", output, SANE_UNSET | REV, ONOCR, 0 ),
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| 223 | #endif
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| 224 | #ifdef ONLRET
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| 225 | MI_ENTRY("onlret", output, SANE_UNSET | REV, ONLRET, 0 ),
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| 226 | #endif
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| 227 | #ifdef OFILL
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| 228 | MI_ENTRY("ofill", output, SANE_UNSET | REV, OFILL, 0 ),
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| 229 | #endif
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| 230 | #ifdef OFDEL
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| 231 | MI_ENTRY("ofdel", output, SANE_UNSET | REV, OFDEL, 0 ),
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| 232 | #endif
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| 233 | #ifdef NLDLY
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| 234 | MI_ENTRY("nl1", output, SANE_UNSET, NL1, NLDLY),
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| 235 | MI_ENTRY("nl0", output, SANE_SET, NL0, NLDLY),
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| 236 | #endif
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| 237 | #ifdef CRDLY
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| 238 | MI_ENTRY("cr3", output, SANE_UNSET, CR3, CRDLY),
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| 239 | MI_ENTRY("cr2", output, SANE_UNSET, CR2, CRDLY),
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| 240 | MI_ENTRY("cr1", output, SANE_UNSET, CR1, CRDLY),
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| 241 | MI_ENTRY("cr0", output, SANE_SET, CR0, CRDLY),
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| 242 | #endif
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| 243 |
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| 244 | #ifdef TABDLY
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| 245 | MI_ENTRY("tab3", output, SANE_UNSET, TAB3, TABDLY),
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| 246 | MI_ENTRY("tab2", output, SANE_UNSET, TAB2, TABDLY),
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| 247 | MI_ENTRY("tab1", output, SANE_UNSET, TAB1, TABDLY),
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| 248 | MI_ENTRY("tab0", output, SANE_SET, TAB0, TABDLY),
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| 249 | #else
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| 250 | # ifdef OXTABS
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| 251 | MI_ENTRY("tab3", output, SANE_UNSET, OXTABS, 0 ),
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| 252 | # endif
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| 253 | #endif
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| 254 |
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| 255 | #ifdef BSDLY
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| 256 | MI_ENTRY("bs1", output, SANE_UNSET, BS1, BSDLY),
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| 257 | MI_ENTRY("bs0", output, SANE_SET, BS0, BSDLY),
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| 258 | #endif
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| 259 | #ifdef VTDLY
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| 260 | MI_ENTRY("vt1", output, SANE_UNSET, VT1, VTDLY),
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| 261 | MI_ENTRY("vt0", output, SANE_SET, VT0, VTDLY),
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| 262 | #endif
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| 263 | #ifdef FFDLY
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| 264 | MI_ENTRY("ff1", output, SANE_UNSET, FF1, FFDLY),
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| 265 | MI_ENTRY("ff0", output, SANE_SET, FF0, FFDLY),
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| 266 | #endif
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| 267 | MI_ENTRY("isig", local, SANE_SET | REV, ISIG, 0 ),
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| 268 | MI_ENTRY("icanon", local, SANE_SET | REV, ICANON, 0 ),
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| 269 | #ifdef IEXTEN
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| 270 | MI_ENTRY("iexten", local, SANE_SET | REV, IEXTEN, 0 ),
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| 271 | #endif
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| 272 | MI_ENTRY("echo", local, SANE_SET | REV, ECHO, 0 ),
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| 273 | MI_ENTRY("echoe", local, SANE_SET | REV, ECHOE, 0 ),
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| 274 | MI_ENTRY("crterase", local, REV | OMIT, ECHOE, 0 ),
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| 275 | MI_ENTRY("echok", local, SANE_SET | REV, ECHOK, 0 ),
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| 276 | MI_ENTRY("echonl", local, SANE_UNSET | REV, ECHONL, 0 ),
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| 277 | MI_ENTRY("noflsh", local, SANE_UNSET | REV, NOFLSH, 0 ),
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| 278 | #ifdef XCASE
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| 279 | MI_ENTRY("xcase", local, SANE_UNSET | REV, XCASE, 0 ),
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| 280 | #endif
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| 281 | #ifdef TOSTOP
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| 282 | MI_ENTRY("tostop", local, SANE_UNSET | REV, TOSTOP, 0 ),
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| 283 | #endif
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| 284 | #ifdef ECHOPRT
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| 285 | MI_ENTRY("echoprt", local, SANE_UNSET | REV, ECHOPRT, 0 ),
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| 286 | MI_ENTRY("prterase", local, REV | OMIT, ECHOPRT, 0 ),
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| 287 | #endif
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| 288 | #ifdef ECHOCTL
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| 289 | MI_ENTRY("echoctl", local, SANE_SET | REV, ECHOCTL, 0 ),
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| 290 | MI_ENTRY("ctlecho", local, REV | OMIT, ECHOCTL, 0 ),
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| 291 | #endif
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| 292 | #ifdef ECHOKE
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| 293 | MI_ENTRY("echoke", local, SANE_SET | REV, ECHOKE, 0 ),
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| 294 | MI_ENTRY("crtkill", local, REV | OMIT, ECHOKE, 0 ),
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| 295 | #endif
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| 296 | MI_ENTRY(evenp, combination, REV | OMIT, 0, 0 ),
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| 297 | MI_ENTRY(parity, combination, REV | OMIT, 0, 0 ),
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| 298 | MI_ENTRY(stty_oddp, combination, REV | OMIT, 0, 0 ),
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| 299 | MI_ENTRY(stty_nl, combination, REV | OMIT, 0, 0 ),
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| 300 | MI_ENTRY(stty_ek, combination, OMIT, 0, 0 ),
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| 301 | MI_ENTRY(stty_sane, combination, OMIT, 0, 0 ),
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| 302 | MI_ENTRY(cooked, combination, REV | OMIT, 0, 0 ),
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| 303 | MI_ENTRY(raw, combination, REV | OMIT, 0, 0 ),
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| 304 | MI_ENTRY(stty_pass8, combination, REV | OMIT, 0, 0 ),
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| 305 | MI_ENTRY(litout, combination, REV | OMIT, 0, 0 ),
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| 306 | MI_ENTRY(cbreak, combination, REV | OMIT, 0, 0 ),
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| 307 | #ifdef IXANY
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| 308 | MI_ENTRY(decctlq, combination, REV | OMIT, 0, 0 ),
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| 309 | #endif
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[1765] | 310 | #if defined(TABDLY) || defined(OXTABS)
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[821] | 311 | MI_ENTRY(stty_tabs, combination, REV | OMIT, 0, 0 ),
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| 312 | #endif
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| 313 | #if defined(XCASE) && defined(IUCLC) && defined(OLCUC)
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| 314 | MI_ENTRY(stty_lcase, combination, REV | OMIT, 0, 0 ),
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| 315 | MI_ENTRY(stty_LCASE, combination, REV | OMIT, 0, 0 ),
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| 316 | #endif
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| 317 | MI_ENTRY(stty_crt, combination, OMIT, 0, 0 ),
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| 318 | MI_ENTRY(stty_dec, combination, OMIT, 0, 0 ),
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| 319 | };
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| 320 |
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| 321 | enum {
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[1765] | 322 | NUM_mode_info = ARRAY_SIZE(mode_info)
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[821] | 323 | };
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| 324 |
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[1765] | 325 | /* Control character settings */
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[821] | 326 | struct control_info {
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[1765] | 327 | const char *const name; /* Name given on command line */
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| 328 | const unsigned char saneval; /* Value to set for 'stty sane' */
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| 329 | const unsigned char offset; /* Offset in c_cc */
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[821] | 330 | };
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| 331 |
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[1765] | 332 | /* Control characters */
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[821] | 333 |
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[1765] | 334 | static const struct control_info control_info[] = {
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[821] | 335 | {"intr", CINTR, VINTR},
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| 336 | {"quit", CQUIT, VQUIT},
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| 337 | {"erase", CERASE, VERASE},
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| 338 | {"kill", CKILL, VKILL},
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| 339 | {stty_eof, CEOF, VEOF},
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| 340 | {stty_eol, CEOL, VEOL},
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| 341 | #ifdef VEOL2
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| 342 | {"eol2", CEOL2, VEOL2},
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| 343 | #endif
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| 344 | #ifdef VSWTCH
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| 345 | {stty_swtch, CSWTCH, VSWTCH},
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| 346 | #endif
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| 347 | {"start", CSTART, VSTART},
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| 348 | {"stop", CSTOP, VSTOP},
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| 349 | {"susp", CSUSP, VSUSP},
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| 350 | #ifdef VDSUSP
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| 351 | {"dsusp", CDSUSP, VDSUSP},
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| 352 | #endif
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| 353 | #ifdef VREPRINT
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| 354 | {"rprnt", CRPRNT, VREPRINT},
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| 355 | #endif
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| 356 | #ifdef VWERASE
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| 357 | {"werase", CWERASE, VWERASE},
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| 358 | #endif
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| 359 | #ifdef VLNEXT
|
---|
| 360 | {"lnext", CLNEXT, VLNEXT},
|
---|
| 361 | #endif
|
---|
| 362 | #ifdef VFLUSHO
|
---|
| 363 | {"flush", CFLUSHO, VFLUSHO},
|
---|
| 364 | #endif
|
---|
| 365 | #ifdef VSTATUS
|
---|
| 366 | {"status", CSTATUS, VSTATUS},
|
---|
| 367 | #endif
|
---|
[1765] | 368 | /* These must be last because of the display routines */
|
---|
[821] | 369 | {stty_min, 1, VMIN},
|
---|
| 370 | {stty_time, 0, VTIME},
|
---|
| 371 | };
|
---|
| 372 |
|
---|
| 373 | enum {
|
---|
[1765] | 374 | NUM_control_info = ARRAY_SIZE(control_info)
|
---|
[821] | 375 | };
|
---|
| 376 |
|
---|
[1765] | 377 | /* The width of the screen, for output wrapping */
|
---|
| 378 | unsigned max_col = 80; /* default */
|
---|
[821] | 379 |
|
---|
[1765] | 380 | struct globals {
|
---|
| 381 | /* Current position, to know when to wrap */
|
---|
| 382 | unsigned current_col;
|
---|
| 383 | char buf[10];
|
---|
| 384 | };
|
---|
| 385 | #define G (*(struct globals*)&bb_common_bufsiz1)
|
---|
[821] | 386 |
|
---|
[1765] | 387 | static const char *device_name = bb_msg_standard_input;
|
---|
[821] | 388 |
|
---|
[1765] | 389 | /* Return a string that is the printable representation of character CH */
|
---|
| 390 | /* Adapted from 'cat' by Torbjorn Granlund */
|
---|
| 391 | static const char *visible(unsigned ch)
|
---|
[821] | 392 | {
|
---|
[1765] | 393 | char *bpout = G.buf;
|
---|
[821] | 394 |
|
---|
[1765] | 395 | if (ch == _POSIX_VDISABLE)
|
---|
| 396 | return "<undef>";
|
---|
[821] | 397 |
|
---|
[1765] | 398 | if (ch >= 128) {
|
---|
| 399 | ch -= 128;
|
---|
| 400 | *bpout++ = 'M';
|
---|
| 401 | *bpout++ = '-';
|
---|
[821] | 402 | }
|
---|
| 403 |
|
---|
[1765] | 404 | if (ch < 32) {
|
---|
| 405 | *bpout++ = '^';
|
---|
| 406 | *bpout++ = ch + 64;
|
---|
| 407 | } else if (ch < 127) {
|
---|
| 408 | *bpout++ = ch;
|
---|
[821] | 409 | } else {
|
---|
[1765] | 410 | *bpout++ = '^';
|
---|
| 411 | *bpout++ = '?';
|
---|
[821] | 412 | }
|
---|
| 413 |
|
---|
[1765] | 414 | *bpout = '\0';
|
---|
| 415 | return G.buf;
|
---|
[821] | 416 | }
|
---|
| 417 |
|
---|
[1765] | 418 | static tcflag_t *mode_type_flag(unsigned type, const struct termios *mode)
|
---|
[821] | 419 | {
|
---|
[1765] | 420 | static const unsigned char tcflag_offsets[] ALIGN1 = {
|
---|
| 421 | offsetof(struct termios, c_cflag), /* control */
|
---|
| 422 | offsetof(struct termios, c_iflag), /* input */
|
---|
| 423 | offsetof(struct termios, c_oflag), /* output */
|
---|
| 424 | offsetof(struct termios, c_lflag) /* local */
|
---|
| 425 | };
|
---|
[821] | 426 |
|
---|
[1765] | 427 | if (type <= local) {
|
---|
| 428 | return (tcflag_t*) (((char*)mode) + tcflag_offsets[type]);
|
---|
| 429 | }
|
---|
| 430 | return NULL;
|
---|
[821] | 431 | }
|
---|
| 432 |
|
---|
[1765] | 433 | static void set_speed_or_die(enum speed_setting type, const char *const arg,
|
---|
| 434 | struct termios * const mode)
|
---|
[821] | 435 | {
|
---|
| 436 | speed_t baud;
|
---|
| 437 |
|
---|
[1765] | 438 | baud = tty_value_to_baud(xatou(arg));
|
---|
[821] | 439 |
|
---|
| 440 | if (type != output_speed) { /* either input or both */
|
---|
| 441 | cfsetispeed(mode, baud);
|
---|
| 442 | }
|
---|
| 443 | if (type != input_speed) { /* either output or both */
|
---|
| 444 | cfsetospeed(mode, baud);
|
---|
| 445 | }
|
---|
| 446 | }
|
---|
| 447 |
|
---|
[1765] | 448 | static ATTRIBUTE_NORETURN void perror_on_device_and_die(const char *fmt)
|
---|
| 449 | {
|
---|
| 450 | bb_perror_msg_and_die(fmt, device_name);
|
---|
| 451 | }
|
---|
[821] | 452 |
|
---|
[1765] | 453 | static void perror_on_device(const char *fmt)
|
---|
[821] | 454 | {
|
---|
[1765] | 455 | bb_perror_msg(fmt, device_name);
|
---|
| 456 | }
|
---|
[821] | 457 |
|
---|
[1765] | 458 | /* Print format string MESSAGE and optional args.
|
---|
| 459 | Wrap to next line first if it won't fit.
|
---|
| 460 | Print a space first unless MESSAGE will start a new line */
|
---|
| 461 | static void wrapf(const char *message, ...)
|
---|
| 462 | {
|
---|
| 463 | char buf[128];
|
---|
| 464 | va_list args;
|
---|
| 465 | int buflen;
|
---|
| 466 |
|
---|
| 467 | va_start(args, message);
|
---|
| 468 | buflen = vsnprintf(buf, sizeof(buf), message, args);
|
---|
| 469 | va_end(args);
|
---|
| 470 | /* We seem to be called only with suitable lengths, but check if
|
---|
| 471 | somebody failed to adhere to this assumption just to be sure. */
|
---|
| 472 | if (!buflen || buflen >= sizeof(buf)) return;
|
---|
| 473 |
|
---|
| 474 | if (G.current_col > 0) {
|
---|
| 475 | G.current_col++;
|
---|
| 476 | if (buf[0] != '\n') {
|
---|
| 477 | if (G.current_col + buflen >= max_col) {
|
---|
| 478 | putchar('\n');
|
---|
| 479 | G.current_col = 0;
|
---|
| 480 | } else
|
---|
| 481 | putchar(' ');
|
---|
| 482 | }
|
---|
| 483 | }
|
---|
| 484 | fputs(buf, stdout);
|
---|
| 485 | G.current_col += buflen;
|
---|
| 486 | if (buf[buflen-1] == '\n')
|
---|
| 487 | G.current_col = 0;
|
---|
[821] | 488 | }
|
---|
| 489 |
|
---|
[1765] | 490 | static void set_window_size(const int rows, const int cols)
|
---|
[821] | 491 | {
|
---|
[1765] | 492 | struct winsize win = { 0, 0, 0, 0};
|
---|
[821] | 493 |
|
---|
[1765] | 494 | if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win)) {
|
---|
| 495 | if (errno != EINVAL) {
|
---|
| 496 | goto bail;
|
---|
| 497 | }
|
---|
[821] | 498 | memset(&win, 0, sizeof(win));
|
---|
| 499 | }
|
---|
| 500 |
|
---|
| 501 | if (rows >= 0)
|
---|
| 502 | win.ws_row = rows;
|
---|
| 503 | if (cols >= 0)
|
---|
| 504 | win.ws_col = cols;
|
---|
| 505 |
|
---|
| 506 | if (ioctl(STDIN_FILENO, TIOCSWINSZ, (char *) &win))
|
---|
[1765] | 507 | bail:
|
---|
[821] | 508 | perror_on_device("%s");
|
---|
| 509 | }
|
---|
| 510 |
|
---|
[1765] | 511 | static void display_window_size(const int fancy)
|
---|
[821] | 512 | {
|
---|
[1765] | 513 | const char *fmt_str = "%s\0%s: no size information for this device";
|
---|
| 514 | unsigned width, height;
|
---|
[821] | 515 |
|
---|
[1765] | 516 | if (get_terminal_width_height(STDIN_FILENO, &width, &height)) {
|
---|
[821] | 517 | if ((errno != EINVAL) || ((fmt_str += 2), !fancy)) {
|
---|
| 518 | perror_on_device(fmt_str);
|
---|
| 519 | }
|
---|
| 520 | } else {
|
---|
| 521 | wrapf(fancy ? "rows %d; columns %d;" : "%d %d\n",
|
---|
[1765] | 522 | height, width);
|
---|
[821] | 523 | }
|
---|
| 524 | }
|
---|
| 525 |
|
---|
[1765] | 526 | static const struct suffix_mult stty_suffixes[] = {
|
---|
| 527 | { "b", 512 },
|
---|
| 528 | { "k", 1024 },
|
---|
| 529 | { "B", 1024 },
|
---|
| 530 | { }
|
---|
| 531 | };
|
---|
| 532 |
|
---|
| 533 | static const struct mode_info *find_mode(const char *name)
|
---|
[821] | 534 | {
|
---|
[1765] | 535 | int i;
|
---|
| 536 | for (i = 0; i < NUM_mode_info; ++i)
|
---|
| 537 | if (!strcmp(name, mode_info[i].name))
|
---|
| 538 | return &mode_info[i];
|
---|
| 539 | return 0;
|
---|
| 540 | }
|
---|
[821] | 541 |
|
---|
[1765] | 542 | static const struct control_info *find_control(const char *name)
|
---|
| 543 | {
|
---|
| 544 | int i;
|
---|
| 545 | for (i = 0; i < NUM_control_info; ++i)
|
---|
| 546 | if (!strcmp(name, control_info[i].name))
|
---|
| 547 | return &control_info[i];
|
---|
| 548 | return 0;
|
---|
| 549 | }
|
---|
[821] | 550 |
|
---|
[1765] | 551 | enum {
|
---|
| 552 | param_need_arg = 0x80,
|
---|
| 553 | param_line = 1 | 0x80,
|
---|
| 554 | param_rows = 2 | 0x80,
|
---|
| 555 | param_cols = 3 | 0x80,
|
---|
| 556 | param_columns = 4 | 0x80,
|
---|
| 557 | param_size = 5,
|
---|
| 558 | param_speed = 6,
|
---|
| 559 | param_ispeed = 7 | 0x80,
|
---|
| 560 | param_ospeed = 8 | 0x80,
|
---|
| 561 | };
|
---|
[821] | 562 |
|
---|
[1765] | 563 | static int find_param(const char *const name)
|
---|
| 564 | {
|
---|
| 565 | static const char params[] ALIGN1 =
|
---|
| 566 | "line\0" /* 1 */
|
---|
| 567 | "rows\0" /* 2 */
|
---|
| 568 | "cols\0" /* 3 */
|
---|
| 569 | "columns\0" /* 4 */
|
---|
| 570 | "size\0" /* 5 */
|
---|
| 571 | "speed\0" /* 6 */
|
---|
| 572 | "ispeed\0"
|
---|
| 573 | "ospeed\0";
|
---|
| 574 | int i = index_in_strings(params, name) + 1;
|
---|
| 575 | if (i == 0)
|
---|
| 576 | return 0;
|
---|
| 577 | if (i != 5 && i != 6)
|
---|
| 578 | i |= 0x80;
|
---|
| 579 | return i;
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | static int recover_mode(const char *arg, struct termios *mode)
|
---|
| 583 | {
|
---|
| 584 | int i, n;
|
---|
| 585 | unsigned chr;
|
---|
| 586 | unsigned long iflag, oflag, cflag, lflag;
|
---|
| 587 |
|
---|
| 588 | /* Scan into temporaries since it is too much trouble to figure out
|
---|
| 589 | the right format for 'tcflag_t' */
|
---|
| 590 | if (sscanf(arg, "%lx:%lx:%lx:%lx%n",
|
---|
| 591 | &iflag, &oflag, &cflag, &lflag, &n) != 4)
|
---|
| 592 | return 0;
|
---|
| 593 | mode->c_iflag = iflag;
|
---|
| 594 | mode->c_oflag = oflag;
|
---|
| 595 | mode->c_cflag = cflag;
|
---|
| 596 | mode->c_lflag = lflag;
|
---|
| 597 | arg += n;
|
---|
| 598 | for (i = 0; i < NCCS; ++i) {
|
---|
| 599 | if (sscanf(arg, ":%x%n", &chr, &n) != 1)
|
---|
| 600 | return 0;
|
---|
| 601 | mode->c_cc[i] = chr;
|
---|
| 602 | arg += n;
|
---|
[821] | 603 | }
|
---|
[1765] | 604 |
|
---|
| 605 | /* Fail if there are too many fields */
|
---|
| 606 | if (*arg != '\0')
|
---|
| 607 | return 0;
|
---|
| 608 |
|
---|
| 609 | return 1;
|
---|
[821] | 610 | }
|
---|
| 611 |
|
---|
[1765] | 612 | static void display_recoverable(const struct termios *mode,
|
---|
| 613 | int ATTRIBUTE_UNUSED dummy)
|
---|
[821] | 614 | {
|
---|
[1765] | 615 | int i;
|
---|
| 616 | printf("%lx:%lx:%lx:%lx",
|
---|
| 617 | (unsigned long) mode->c_iflag, (unsigned long) mode->c_oflag,
|
---|
| 618 | (unsigned long) mode->c_cflag, (unsigned long) mode->c_lflag);
|
---|
| 619 | for (i = 0; i < NCCS; ++i)
|
---|
| 620 | printf(":%x", (unsigned int) mode->c_cc[i]);
|
---|
| 621 | putchar('\n');
|
---|
| 622 | }
|
---|
[821] | 623 |
|
---|
[1765] | 624 | static void display_speed(const struct termios *mode, int fancy)
|
---|
| 625 | {
|
---|
| 626 | //01234567 8 9
|
---|
| 627 | const char *fmt_str = "%lu %lu\n\0ispeed %lu baud; ospeed %lu baud;";
|
---|
| 628 | unsigned long ispeed, ospeed;
|
---|
| 629 |
|
---|
| 630 | ospeed = ispeed = cfgetispeed(mode);
|
---|
| 631 | if (ispeed == 0 || ispeed == (ospeed = cfgetospeed(mode))) {
|
---|
| 632 | ispeed = ospeed; /* in case ispeed was 0 */
|
---|
| 633 | //0123 4 5 6 7 8 9
|
---|
| 634 | fmt_str = "%lu\n\0\0\0\0\0speed %lu baud;";
|
---|
[821] | 635 | }
|
---|
[1765] | 636 | if (fancy) fmt_str += 9;
|
---|
| 637 | wrapf(fmt_str, tty_baud_to_value(ispeed), tty_baud_to_value(ospeed));
|
---|
[821] | 638 | }
|
---|
| 639 |
|
---|
[1765] | 640 | static void do_display(const struct termios *mode, const int all)
|
---|
[821] | 641 | {
|
---|
| 642 | int i;
|
---|
| 643 | tcflag_t *bitsp;
|
---|
| 644 | unsigned long mask;
|
---|
[1765] | 645 | int prev_type = control;
|
---|
[821] | 646 |
|
---|
| 647 | display_speed(mode, 1);
|
---|
[1765] | 648 | if (all)
|
---|
| 649 | display_window_size(1);
|
---|
[821] | 650 | #ifdef HAVE_C_LINE
|
---|
[1765] | 651 | wrapf("line = %d;\n", mode->c_line);
|
---|
| 652 | #else
|
---|
| 653 | wrapf("\n");
|
---|
[821] | 654 | #endif
|
---|
| 655 |
|
---|
| 656 | for (i = 0; control_info[i].name != stty_min; ++i) {
|
---|
[1765] | 657 | /* If swtch is the same as susp, don't print both */
|
---|
[821] | 658 | #if VSWTCH == VSUSP
|
---|
| 659 | if (control_info[i].name == stty_swtch)
|
---|
| 660 | continue;
|
---|
| 661 | #endif
|
---|
[1765] | 662 | /* If eof uses the same slot as min, only print whichever applies */
|
---|
[821] | 663 | #if VEOF == VMIN
|
---|
| 664 | if ((mode->c_lflag & ICANON) == 0
|
---|
| 665 | && (control_info[i].name == stty_eof
|
---|
| 666 | || control_info[i].name == stty_eol)) continue;
|
---|
| 667 | #endif
|
---|
| 668 | wrapf("%s = %s;", control_info[i].name,
|
---|
| 669 | visible(mode->c_cc[control_info[i].offset]));
|
---|
| 670 | }
|
---|
[1765] | 671 | #if VEOF == VMIN
|
---|
| 672 | if ((mode->c_lflag & ICANON) == 0)
|
---|
| 673 | #endif
|
---|
| 674 | wrapf("min = %d; time = %d;", mode->c_cc[VMIN], mode->c_cc[VTIME]);
|
---|
| 675 | if (G.current_col) wrapf("\n");
|
---|
[821] | 676 |
|
---|
| 677 | for (i = 0; i < NUM_mode_info; ++i) {
|
---|
| 678 | if (mode_info[i].flags & OMIT)
|
---|
| 679 | continue;
|
---|
[1765] | 680 | if (mode_info[i].type != prev_type) {
|
---|
| 681 | /* wrapf("\n"); */
|
---|
| 682 | if (G.current_col) wrapf("\n");
|
---|
| 683 | prev_type = mode_info[i].type;
|
---|
[821] | 684 | }
|
---|
| 685 |
|
---|
[1765] | 686 | bitsp = mode_type_flag(mode_info[i].type, mode);
|
---|
[821] | 687 | mask = mode_info[i].mask ? mode_info[i].mask : mode_info[i].bits;
|
---|
| 688 | if ((*bitsp & mask) == mode_info[i].bits) {
|
---|
[1765] | 689 | if (all || (mode_info[i].flags & SANE_UNSET))
|
---|
[821] | 690 | wrapf("%s", mode_info[i].name);
|
---|
[1765] | 691 | } else {
|
---|
| 692 | if ((all && mode_info[i].flags & REV) ||
|
---|
| 693 | (!all &&
|
---|
| 694 | (mode_info[i].flags & (SANE_SET | REV)) == (SANE_SET | REV)))
|
---|
| 695 | wrapf("-%s", mode_info[i].name);
|
---|
[821] | 696 | }
|
---|
| 697 | }
|
---|
[1765] | 698 | if (G.current_col) wrapf("\n");
|
---|
[821] | 699 | }
|
---|
| 700 |
|
---|
[1765] | 701 | static void sane_mode(struct termios *mode)
|
---|
[821] | 702 | {
|
---|
| 703 | int i;
|
---|
| 704 | tcflag_t *bitsp;
|
---|
| 705 |
|
---|
[1765] | 706 | for (i = 0; i < NUM_control_info; ++i) {
|
---|
| 707 | #if VMIN == VEOF
|
---|
| 708 | if (control_info[i].name == stty_min)
|
---|
| 709 | break;
|
---|
[821] | 710 | #endif
|
---|
[1765] | 711 | mode->c_cc[control_info[i].offset] = control_info[i].saneval;
|
---|
[821] | 712 | }
|
---|
| 713 |
|
---|
| 714 | for (i = 0; i < NUM_mode_info; ++i) {
|
---|
[1765] | 715 | if (mode_info[i].flags & SANE_SET) {
|
---|
| 716 | bitsp = mode_type_flag(mode_info[i].type, mode);
|
---|
| 717 | *bitsp = (*bitsp & ~((unsigned long)mode_info[i].mask))
|
---|
| 718 | | mode_info[i].bits;
|
---|
| 719 | } else if (mode_info[i].flags & SANE_UNSET) {
|
---|
| 720 | bitsp = mode_type_flag(mode_info[i].type, mode);
|
---|
| 721 | *bitsp = *bitsp & ~((unsigned long)mode_info[i].mask)
|
---|
| 722 | & ~mode_info[i].bits;
|
---|
[821] | 723 | }
|
---|
| 724 | }
|
---|
| 725 | }
|
---|
| 726 |
|
---|
[1765] | 727 | /* Save set_mode from #ifdef forest plague */
|
---|
| 728 | #ifndef ONLCR
|
---|
| 729 | #define ONLCR 0
|
---|
| 730 | #endif
|
---|
| 731 | #ifndef OCRNL
|
---|
| 732 | #define OCRNL 0
|
---|
| 733 | #endif
|
---|
| 734 | #ifndef ONLRET
|
---|
| 735 | #define ONLRET 0
|
---|
| 736 | #endif
|
---|
| 737 | #ifndef XCASE
|
---|
| 738 | #define XCASE 0
|
---|
| 739 | #endif
|
---|
| 740 | #ifndef IXANY
|
---|
| 741 | #define IXANY 0
|
---|
| 742 | #endif
|
---|
| 743 | #ifndef TABDLY
|
---|
| 744 | #define TABDLY 0
|
---|
| 745 | #endif
|
---|
| 746 | #ifndef OXTABS
|
---|
| 747 | #define OXTABS 0
|
---|
| 748 | #endif
|
---|
| 749 | #ifndef IUCLC
|
---|
| 750 | #define IUCLC 0
|
---|
| 751 | #endif
|
---|
| 752 | #ifndef OLCUC
|
---|
| 753 | #define OLCUC 0
|
---|
| 754 | #endif
|
---|
| 755 | #ifndef ECHOCTL
|
---|
| 756 | #define ECHOCTL 0
|
---|
| 757 | #endif
|
---|
| 758 | #ifndef ECHOKE
|
---|
| 759 | #define ECHOKE 0
|
---|
| 760 | #endif
|
---|
| 761 |
|
---|
| 762 | static void set_mode(const struct mode_info *info, int reversed,
|
---|
| 763 | struct termios *mode)
|
---|
[821] | 764 | {
|
---|
[1765] | 765 | tcflag_t *bitsp;
|
---|
[821] | 766 |
|
---|
[1765] | 767 | bitsp = mode_type_flag(info->type, mode);
|
---|
| 768 |
|
---|
| 769 | if (bitsp) {
|
---|
| 770 | if (reversed)
|
---|
| 771 | *bitsp = *bitsp & ~info->mask & ~info->bits;
|
---|
| 772 | else
|
---|
| 773 | *bitsp = (*bitsp & ~info->mask) | info->bits;
|
---|
| 774 | return;
|
---|
[821] | 775 | }
|
---|
[1765] | 776 |
|
---|
| 777 | /* Combination mode */
|
---|
| 778 | if (info->name == evenp || info->name == parity) {
|
---|
| 779 | if (reversed)
|
---|
| 780 | mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
|
---|
| 781 | else
|
---|
| 782 | mode->c_cflag = (mode->c_cflag & ~PARODD & ~CSIZE) | PARENB | CS7;
|
---|
| 783 | } else if (info->name == stty_oddp) {
|
---|
| 784 | if (reversed)
|
---|
| 785 | mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
|
---|
| 786 | else
|
---|
| 787 | mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARODD | PARENB;
|
---|
| 788 | } else if (info->name == stty_nl) {
|
---|
| 789 | if (reversed) {
|
---|
| 790 | mode->c_iflag = (mode->c_iflag | ICRNL) & ~INLCR & ~IGNCR;
|
---|
| 791 | mode->c_oflag = (mode->c_oflag | ONLCR) & ~OCRNL & ~ONLRET;
|
---|
| 792 | } else {
|
---|
| 793 | mode->c_iflag = mode->c_iflag & ~ICRNL;
|
---|
| 794 | if (ONLCR) mode->c_oflag = mode->c_oflag & ~ONLCR;
|
---|
| 795 | }
|
---|
| 796 | } else if (info->name == stty_ek) {
|
---|
| 797 | mode->c_cc[VERASE] = CERASE;
|
---|
| 798 | mode->c_cc[VKILL] = CKILL;
|
---|
| 799 | } else if (info->name == stty_sane) {
|
---|
| 800 | sane_mode(mode);
|
---|
[821] | 801 | }
|
---|
[1765] | 802 | else if (info->name == cbreak) {
|
---|
| 803 | if (reversed)
|
---|
| 804 | mode->c_lflag |= ICANON;
|
---|
| 805 | else
|
---|
| 806 | mode->c_lflag &= ~ICANON;
|
---|
| 807 | } else if (info->name == stty_pass8) {
|
---|
| 808 | if (reversed) {
|
---|
| 809 | mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
|
---|
| 810 | mode->c_iflag |= ISTRIP;
|
---|
| 811 | } else {
|
---|
| 812 | mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
|
---|
| 813 | mode->c_iflag &= ~ISTRIP;
|
---|
| 814 | }
|
---|
| 815 | } else if (info->name == litout) {
|
---|
| 816 | if (reversed) {
|
---|
| 817 | mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
|
---|
| 818 | mode->c_iflag |= ISTRIP;
|
---|
| 819 | mode->c_oflag |= OPOST;
|
---|
| 820 | } else {
|
---|
| 821 | mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
|
---|
| 822 | mode->c_iflag &= ~ISTRIP;
|
---|
| 823 | mode->c_oflag &= ~OPOST;
|
---|
| 824 | }
|
---|
| 825 | } else if (info->name == raw || info->name == cooked) {
|
---|
| 826 | if ((info->name[0] == 'r' && reversed)
|
---|
| 827 | || (info->name[0] == 'c' && !reversed)) {
|
---|
| 828 | /* Cooked mode */
|
---|
| 829 | mode->c_iflag |= BRKINT | IGNPAR | ISTRIP | ICRNL | IXON;
|
---|
| 830 | mode->c_oflag |= OPOST;
|
---|
| 831 | mode->c_lflag |= ISIG | ICANON;
|
---|
| 832 | #if VMIN == VEOF
|
---|
| 833 | mode->c_cc[VEOF] = CEOF;
|
---|
| 834 | #endif
|
---|
| 835 | #if VTIME == VEOL
|
---|
| 836 | mode->c_cc[VEOL] = CEOL;
|
---|
| 837 | #endif
|
---|
| 838 | } else {
|
---|
| 839 | /* Raw mode */
|
---|
| 840 | mode->c_iflag = 0;
|
---|
| 841 | mode->c_oflag &= ~OPOST;
|
---|
| 842 | mode->c_lflag &= ~(ISIG | ICANON | XCASE);
|
---|
| 843 | mode->c_cc[VMIN] = 1;
|
---|
| 844 | mode->c_cc[VTIME] = 0;
|
---|
| 845 | }
|
---|
| 846 | }
|
---|
| 847 | else if (IXANY && info->name == decctlq) {
|
---|
| 848 | if (reversed)
|
---|
| 849 | mode->c_iflag |= IXANY;
|
---|
| 850 | else
|
---|
| 851 | mode->c_iflag &= ~IXANY;
|
---|
| 852 | }
|
---|
| 853 | else if (TABDLY && info->name == stty_tabs) {
|
---|
| 854 | if (reversed)
|
---|
| 855 | mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3;
|
---|
| 856 | else
|
---|
| 857 | mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0;
|
---|
| 858 | }
|
---|
| 859 | else if (OXTABS && info->name == stty_tabs) {
|
---|
| 860 | if (reversed)
|
---|
| 861 | mode->c_oflag |= OXTABS;
|
---|
| 862 | else
|
---|
| 863 | mode->c_oflag &= ~OXTABS;
|
---|
| 864 | }
|
---|
| 865 | else if (XCASE && IUCLC && OLCUC
|
---|
| 866 | && (info->name == stty_lcase || info->name == stty_LCASE)) {
|
---|
| 867 | if (reversed) {
|
---|
| 868 | mode->c_lflag &= ~XCASE;
|
---|
| 869 | mode->c_iflag &= ~IUCLC;
|
---|
| 870 | mode->c_oflag &= ~OLCUC;
|
---|
| 871 | } else {
|
---|
| 872 | mode->c_lflag |= XCASE;
|
---|
| 873 | mode->c_iflag |= IUCLC;
|
---|
| 874 | mode->c_oflag |= OLCUC;
|
---|
| 875 | }
|
---|
| 876 | }
|
---|
| 877 | else if (info->name == stty_crt) {
|
---|
| 878 | mode->c_lflag |= ECHOE | ECHOCTL | ECHOKE;
|
---|
| 879 | }
|
---|
| 880 | else if (info->name == stty_dec) {
|
---|
| 881 | mode->c_cc[VINTR] = 3; /* ^C */
|
---|
| 882 | mode->c_cc[VERASE] = 127; /* DEL */
|
---|
| 883 | mode->c_cc[VKILL] = 21; /* ^U */
|
---|
| 884 | mode->c_lflag |= ECHOE | ECHOCTL | ECHOKE;
|
---|
| 885 | if (IXANY) mode->c_iflag &= ~IXANY;
|
---|
| 886 | }
|
---|
[821] | 887 | }
|
---|
| 888 |
|
---|
[1765] | 889 | static void set_control_char_or_die(const struct control_info *info,
|
---|
| 890 | const char *arg, struct termios *mode)
|
---|
[821] | 891 | {
|
---|
[1765] | 892 | unsigned char value;
|
---|
[821] | 893 |
|
---|
[1765] | 894 | if (info->name == stty_min || info->name == stty_time)
|
---|
| 895 | value = xatoul_range_sfx(arg, 0, 0xff, stty_suffixes);
|
---|
| 896 | else if (arg[0] == '\0' || arg[1] == '\0')
|
---|
| 897 | value = arg[0];
|
---|
| 898 | else if (!strcmp(arg, "^-") || !strcmp(arg, "undef"))
|
---|
| 899 | value = _POSIX_VDISABLE;
|
---|
| 900 | else if (arg[0] == '^') { /* Ignore any trailing junk (^Cjunk) */
|
---|
| 901 | value = arg[1] & 0x1f; /* Non-letters get weird results */
|
---|
| 902 | if (arg[1] == '?')
|
---|
| 903 | value = 127;
|
---|
| 904 | } else
|
---|
| 905 | value = xatoul_range_sfx(arg, 0, 0xff, stty_suffixes);
|
---|
| 906 | mode->c_cc[info->offset] = value;
|
---|
[821] | 907 | }
|
---|
| 908 |
|
---|
[1765] | 909 | #define STTY_require_set_attr (1<<0)
|
---|
| 910 | #define STTY_speed_was_set (1<<1)
|
---|
| 911 | #define STTY_verbose_output (1<<2)
|
---|
| 912 | #define STTY_recoverable_output (1<<3)
|
---|
| 913 | #define STTY_noargs (1<<4)
|
---|
| 914 | int stty_main(int argc, char **argv);
|
---|
| 915 | int stty_main(int argc, char **argv)
|
---|
[821] | 916 | {
|
---|
[1765] | 917 | struct termios mode;
|
---|
| 918 | void (*output_func)(const struct termios *, const int);
|
---|
| 919 | const char *file_name = NULL;
|
---|
| 920 | int display_all = 0;
|
---|
| 921 | int stty_state;
|
---|
| 922 | int k;
|
---|
[821] | 923 |
|
---|
[1765] | 924 | stty_state = STTY_noargs;
|
---|
| 925 | output_func = do_display;
|
---|
[821] | 926 |
|
---|
[1765] | 927 | /* First pass: only parse/verify command line params */
|
---|
| 928 | k = 0;
|
---|
| 929 | while (argv[++k]) {
|
---|
| 930 | const struct mode_info *mp;
|
---|
| 931 | const struct control_info *cp;
|
---|
| 932 | const char *arg = argv[k];
|
---|
| 933 | const char *argnext = argv[k+1];
|
---|
| 934 | int param;
|
---|
[821] | 935 |
|
---|
[1765] | 936 | if (arg[0] == '-') {
|
---|
| 937 | int i;
|
---|
| 938 | mp = find_mode(arg+1);
|
---|
| 939 | if (mp) {
|
---|
| 940 | if (!(mp->flags & REV))
|
---|
| 941 | goto invalid_argument;
|
---|
| 942 | stty_state &= ~STTY_noargs;
|
---|
| 943 | continue;
|
---|
| 944 | }
|
---|
| 945 | /* It is an option - parse it */
|
---|
| 946 | i = 0;
|
---|
| 947 | while (arg[++i]) {
|
---|
| 948 | switch (arg[i]) {
|
---|
| 949 | case 'a':
|
---|
| 950 | stty_state |= STTY_verbose_output;
|
---|
| 951 | output_func = do_display;
|
---|
| 952 | display_all = 1;
|
---|
| 953 | break;
|
---|
| 954 | case 'g':
|
---|
| 955 | stty_state |= STTY_recoverable_output;
|
---|
| 956 | output_func = display_recoverable;
|
---|
| 957 | break;
|
---|
| 958 | case 'F':
|
---|
| 959 | if (file_name)
|
---|
| 960 | bb_error_msg_and_die("only one device may be specified");
|
---|
| 961 | file_name = &arg[i+1]; /* "-Fdevice" ? */
|
---|
| 962 | if (!file_name[0]) { /* nope, "-F device" */
|
---|
| 963 | int p = k+1; /* argv[p] is argnext */
|
---|
| 964 | file_name = argnext;
|
---|
| 965 | if (!file_name)
|
---|
| 966 | bb_error_msg_and_die(bb_msg_requires_arg, "-F");
|
---|
| 967 | /* remove -F param from arg[vc] */
|
---|
| 968 | --argc;
|
---|
| 969 | while (argv[p]) { argv[p] = argv[p+1]; ++p; }
|
---|
| 970 | }
|
---|
| 971 | goto end_option;
|
---|
| 972 | default:
|
---|
| 973 | goto invalid_argument;
|
---|
| 974 | }
|
---|
| 975 | }
|
---|
| 976 | end_option:
|
---|
| 977 | continue;
|
---|
| 978 | }
|
---|
[821] | 979 |
|
---|
[1765] | 980 | mp = find_mode(arg);
|
---|
| 981 | if (mp) {
|
---|
| 982 | stty_state &= ~STTY_noargs;
|
---|
| 983 | continue;
|
---|
| 984 | }
|
---|
[821] | 985 |
|
---|
[1765] | 986 | cp = find_control(arg);
|
---|
| 987 | if (cp) {
|
---|
| 988 | if (!argnext)
|
---|
| 989 | bb_error_msg_and_die(bb_msg_requires_arg, arg);
|
---|
| 990 | /* called for the side effect of xfunc death only */
|
---|
| 991 | set_control_char_or_die(cp, argnext, &mode);
|
---|
| 992 | stty_state &= ~STTY_noargs;
|
---|
| 993 | ++k;
|
---|
| 994 | continue;
|
---|
| 995 | }
|
---|
[821] | 996 |
|
---|
[1765] | 997 | param = find_param(arg);
|
---|
| 998 | if (param & param_need_arg) {
|
---|
| 999 | if (!argnext)
|
---|
| 1000 | bb_error_msg_and_die(bb_msg_requires_arg, arg);
|
---|
| 1001 | ++k;
|
---|
| 1002 | }
|
---|
| 1003 |
|
---|
| 1004 | switch (param) {
|
---|
| 1005 | #ifdef HAVE_C_LINE
|
---|
| 1006 | case param_line:
|
---|
| 1007 | # ifndef TIOCGWINSZ
|
---|
| 1008 | xatoul_range_sfx(argnext, 1, INT_MAX, stty_suffixes);
|
---|
[821] | 1009 | break;
|
---|
[1765] | 1010 | # endif /* else fall-through */
|
---|
[821] | 1011 | #endif
|
---|
[1765] | 1012 | #ifdef TIOCGWINSZ
|
---|
| 1013 | case param_rows:
|
---|
| 1014 | case param_cols:
|
---|
| 1015 | case param_columns:
|
---|
| 1016 | xatoul_range_sfx(argnext, 1, INT_MAX, stty_suffixes);
|
---|
| 1017 | break;
|
---|
| 1018 | case param_size:
|
---|
| 1019 | #endif
|
---|
| 1020 | case param_speed:
|
---|
| 1021 | break;
|
---|
| 1022 | case param_ispeed:
|
---|
| 1023 | /* called for the side effect of xfunc death only */
|
---|
| 1024 | set_speed_or_die(input_speed, argnext, &mode);
|
---|
| 1025 | break;
|
---|
| 1026 | case param_ospeed:
|
---|
| 1027 | /* called for the side effect of xfunc death only */
|
---|
| 1028 | set_speed_or_die(output_speed, argnext, &mode);
|
---|
| 1029 | break;
|
---|
| 1030 | default:
|
---|
| 1031 | if (recover_mode(arg, &mode) == 1) break;
|
---|
| 1032 | if (tty_value_to_baud(xatou(arg)) != (speed_t) -1) break;
|
---|
| 1033 | invalid_argument:
|
---|
| 1034 | bb_error_msg_and_die("invalid argument '%s'", arg);
|
---|
| 1035 | }
|
---|
| 1036 | stty_state &= ~STTY_noargs;
|
---|
[821] | 1037 | }
|
---|
| 1038 |
|
---|
[1765] | 1039 | /* Specifying both -a and -g is an error */
|
---|
| 1040 | if ((stty_state & (STTY_verbose_output | STTY_recoverable_output)) ==
|
---|
| 1041 | (STTY_verbose_output | STTY_recoverable_output))
|
---|
| 1042 | bb_error_msg_and_die("verbose and stty-readable output styles are mutually exclusive");
|
---|
| 1043 | /* Specifying -a or -g with non-options is an error */
|
---|
| 1044 | if (!(stty_state & STTY_noargs) &&
|
---|
| 1045 | (stty_state & (STTY_verbose_output | STTY_recoverable_output)))
|
---|
| 1046 | bb_error_msg_and_die("modes may not be set when specifying an output style");
|
---|
| 1047 |
|
---|
| 1048 | /* Now it is safe to start doing things */
|
---|
| 1049 | if (file_name) {
|
---|
| 1050 | int fd, fdflags;
|
---|
| 1051 | device_name = file_name;
|
---|
| 1052 | fd = xopen(device_name, O_RDONLY | O_NONBLOCK);
|
---|
| 1053 | if (fd != STDIN_FILENO) {
|
---|
| 1054 | dup2(fd, STDIN_FILENO);
|
---|
| 1055 | close(fd);
|
---|
[821] | 1056 | }
|
---|
[1765] | 1057 | fdflags = fcntl(STDIN_FILENO, F_GETFL);
|
---|
| 1058 | if (fdflags < 0 ||
|
---|
| 1059 | fcntl(STDIN_FILENO, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
|
---|
| 1060 | perror_on_device_and_die("%s: cannot reset non-blocking mode");
|
---|
[821] | 1061 | }
|
---|
| 1062 |
|
---|
[1765] | 1063 | /* Initialize to all zeroes so there is no risk memcmp will report a
|
---|
| 1064 | spurious difference in an uninitialized portion of the structure */
|
---|
| 1065 | memset(&mode, 0, sizeof(mode));
|
---|
| 1066 | if (tcgetattr(STDIN_FILENO, &mode))
|
---|
| 1067 | perror_on_device_and_die("%s");
|
---|
[821] | 1068 |
|
---|
[1765] | 1069 | if (stty_state & (STTY_verbose_output | STTY_recoverable_output | STTY_noargs)) {
|
---|
| 1070 | get_terminal_width_height(STDOUT_FILENO, &max_col, NULL);
|
---|
| 1071 | output_func(&mode, display_all);
|
---|
| 1072 | return EXIT_SUCCESS;
|
---|
[821] | 1073 | }
|
---|
| 1074 |
|
---|
[1765] | 1075 | /* Second pass: perform actions */
|
---|
| 1076 | k = 0;
|
---|
| 1077 | while (argv[++k]) {
|
---|
| 1078 | const struct mode_info *mp;
|
---|
| 1079 | const struct control_info *cp;
|
---|
| 1080 | const char *arg = argv[k];
|
---|
| 1081 | const char *argnext = argv[k+1];
|
---|
| 1082 | int param;
|
---|
[821] | 1083 |
|
---|
[1765] | 1084 | if (arg[0] == '-') {
|
---|
| 1085 | mp = find_mode(arg+1);
|
---|
| 1086 | if (mp) {
|
---|
| 1087 | set_mode(mp, 1 /* reversed */, &mode);
|
---|
| 1088 | stty_state |= STTY_require_set_attr;
|
---|
| 1089 | }
|
---|
| 1090 | /* It is an option - already parsed. Skip it */
|
---|
| 1091 | continue;
|
---|
| 1092 | }
|
---|
| 1093 |
|
---|
| 1094 | mp = find_mode(arg);
|
---|
| 1095 | if (mp) {
|
---|
| 1096 | set_mode(mp, 0 /* non-reversed */, &mode);
|
---|
| 1097 | stty_state |= STTY_require_set_attr;
|
---|
| 1098 | continue;
|
---|
| 1099 | }
|
---|
| 1100 |
|
---|
| 1101 | cp = find_control(arg);
|
---|
| 1102 | if (cp) {
|
---|
| 1103 | ++k;
|
---|
| 1104 | set_control_char_or_die(cp, argnext, &mode);
|
---|
| 1105 | stty_state |= STTY_require_set_attr;
|
---|
| 1106 | continue;
|
---|
| 1107 | }
|
---|
| 1108 |
|
---|
| 1109 | param = find_param(arg);
|
---|
| 1110 | if (param & param_need_arg) {
|
---|
| 1111 | ++k;
|
---|
| 1112 | }
|
---|
| 1113 |
|
---|
| 1114 | switch (param) {
|
---|
| 1115 | #ifdef HAVE_C_LINE
|
---|
| 1116 | case param_line:
|
---|
| 1117 | mode.c_line = xatoul_sfx(argnext, stty_suffixes);
|
---|
| 1118 | stty_state |= STTY_require_set_attr;
|
---|
| 1119 | break;
|
---|
| 1120 | #endif
|
---|
| 1121 | #ifdef TIOCGWINSZ
|
---|
| 1122 | case param_cols:
|
---|
| 1123 | set_window_size(-1, xatoul_sfx(argnext, stty_suffixes));
|
---|
| 1124 | break;
|
---|
| 1125 | case param_size:
|
---|
| 1126 | display_window_size(0);
|
---|
| 1127 | break;
|
---|
| 1128 | case param_rows:
|
---|
| 1129 | set_window_size(xatoul_sfx(argnext, stty_suffixes), -1);
|
---|
| 1130 | break;
|
---|
| 1131 | #endif
|
---|
| 1132 | case param_speed:
|
---|
| 1133 | display_speed(&mode, 0);
|
---|
| 1134 | break;
|
---|
| 1135 | case param_ispeed:
|
---|
| 1136 | set_speed_or_die(input_speed, argnext, &mode);
|
---|
| 1137 | stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
|
---|
| 1138 | break;
|
---|
| 1139 | case param_ospeed:
|
---|
| 1140 | set_speed_or_die(output_speed, argnext, &mode);
|
---|
| 1141 | stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
|
---|
| 1142 | break;
|
---|
| 1143 | default:
|
---|
| 1144 | if (recover_mode(arg, &mode) == 1)
|
---|
| 1145 | stty_state |= STTY_require_set_attr;
|
---|
| 1146 | else /* true: if (tty_value_to_baud(xatou(arg)) != (speed_t) -1) */{
|
---|
| 1147 | set_speed_or_die(both_speeds, arg, &mode);
|
---|
| 1148 | stty_state |= (STTY_require_set_attr | STTY_speed_was_set);
|
---|
| 1149 | } /* else - impossible (caught in the first pass):
|
---|
| 1150 | bb_error_msg_and_die("invalid argument '%s'", arg); */
|
---|
| 1151 | }
|
---|
[821] | 1152 | }
|
---|
| 1153 |
|
---|
[1765] | 1154 | if (stty_state & STTY_require_set_attr) {
|
---|
| 1155 | struct termios new_mode;
|
---|
[821] | 1156 |
|
---|
[1765] | 1157 | if (tcsetattr(STDIN_FILENO, TCSADRAIN, &mode))
|
---|
| 1158 | perror_on_device_and_die("%s");
|
---|
[821] | 1159 |
|
---|
[1765] | 1160 | /* POSIX (according to Zlotnick's book) tcsetattr returns zero if
|
---|
| 1161 | it performs *any* of the requested operations. This means it
|
---|
| 1162 | can report 'success' when it has actually failed to perform
|
---|
| 1163 | some proper subset of the requested operations. To detect
|
---|
| 1164 | this partial failure, get the current terminal attributes and
|
---|
| 1165 | compare them to the requested ones */
|
---|
[821] | 1166 |
|
---|
[1765] | 1167 | /* Initialize to all zeroes so there is no risk memcmp will report a
|
---|
| 1168 | spurious difference in an uninitialized portion of the structure */
|
---|
| 1169 | memset(&new_mode, 0, sizeof(new_mode));
|
---|
| 1170 | if (tcgetattr(STDIN_FILENO, &new_mode))
|
---|
| 1171 | perror_on_device_and_die("%s");
|
---|
| 1172 |
|
---|
| 1173 | if (memcmp(&mode, &new_mode, sizeof(mode)) != 0) {
|
---|
| 1174 | #ifdef CIBAUD
|
---|
| 1175 | /* SunOS 4.1.3 (at least) has the problem that after this sequence,
|
---|
| 1176 | tcgetattr (&m1); tcsetattr (&m1); tcgetattr (&m2);
|
---|
| 1177 | sometimes (m1 != m2). The only difference is in the four bits
|
---|
| 1178 | of the c_cflag field corresponding to the baud rate. To save
|
---|
| 1179 | Sun users a little confusion, don't report an error if this
|
---|
| 1180 | happens. But suppress the error only if we haven't tried to
|
---|
| 1181 | set the baud rate explicitly -- otherwise we'd never give an
|
---|
| 1182 | error for a true failure to set the baud rate */
|
---|
| 1183 |
|
---|
| 1184 | new_mode.c_cflag &= (~CIBAUD);
|
---|
| 1185 | if ((stty_state & STTY_speed_was_set)
|
---|
| 1186 | || memcmp(&mode, &new_mode, sizeof(mode)) != 0)
|
---|
[821] | 1187 | #endif
|
---|
[1765] | 1188 | perror_on_device_and_die("%s: cannot perform all requested operations");
|
---|
| 1189 | }
|
---|
| 1190 | }
|
---|
| 1191 |
|
---|
| 1192 | return EXIT_SUCCESS;
|
---|
| 1193 | }
|
---|