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-rw-r--r--stty.c1392
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+/* vi: set sw=4 ts=4: */
+/* stty -- change and print terminal line settings
+ Copyright (C) 1990-1999 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* 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 vodz@usa.net 2001
+
+ */
+
+#include "busybox.h"
+
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <getopt.h>
+
+#include <sys/param.h>
+#include <unistd.h>
+
+#ifndef STDIN_FILENO
+# define STDIN_FILENO 0
+#endif
+
+#ifndef STDOUT_FILENO
+# define STDOUT_FILENO 1
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <memory.h>
+#include <fcntl.h>
+
+#define STREQ(a, b) (strcmp ((a), (b)) == 0)
+
+
+#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
+};
+
+/* What to output and how. */
+enum output_type {
+ changed, all, recoverable /* Default, -a, -g. */
+};
+
+/* Which member(s) of `struct termios' a mode uses. */
+enum mode_type {
+ control, input, output, local, combination
+};
+
+
+static const char evenp[] = "evenp";
+static const char raw[] = "raw";
+static const char stty_min[] = "min";
+static const char stty_time[] = "time";
+static const char stty_swtch[] = "swtch";
+static const char stty_eol[] = "eol";
+static const char stty_eof[] = "eof";
+static const char parity[] = "parity";
+static const char stty_oddp[] = "oddp";
+static const char stty_nl[] = "nl";
+static const char stty_ek[] = "ek";
+static const char stty_sane[] = "sane";
+static const char cbreak[] = "cbreak";
+static const char stty_pass8[] = "pass8";
+static const char litout[] = "litout";
+static const char cooked[] = "cooked";
+static const char decctlq[] = "decctlq";
+static const char stty_tabs[] = "tabs";
+static const char stty_lcase[] = "lcase";
+static const char stty_LCASE[] = "LCASE";
+static const char stty_crt[] = "crt";
+static const char stty_dec[] = "dec";
+
+
+/* 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. */
+struct mode_info {
+ const char *name; /* Name given on command line. */
+ enum mode_type type; /* Which structure element to change. */
+ char flags; /* Setting and display options. */
+ unsigned long bits; /* Bits to set for this mode. */
+ unsigned long mask; /* Other bits to turn off for this mode. */
+};
+
+static const struct mode_info mode_info[] = {
+ {"parenb", control, REV, PARENB, 0},
+ {"parodd", control, REV, PARODD, 0},
+ {"cs5", control, 0, CS5, CSIZE},
+ {"cs6", control, 0, CS6, CSIZE},
+ {"cs7", control, 0, CS7, CSIZE},
+ {"cs8", control, 0, CS8, CSIZE},
+ {"hupcl", control, REV, HUPCL, 0},
+ {"hup", control, REV | OMIT, HUPCL, 0},
+ {"cstopb", control, REV, CSTOPB, 0},
+ {"cread", control, SANE_SET | REV, CREAD, 0},
+ {"clocal", control, REV, CLOCAL, 0},
+#ifdef CRTSCTS
+ {"crtscts", control, REV, CRTSCTS, 0},
+#endif
+
+ {"ignbrk", input, SANE_UNSET | REV, IGNBRK, 0},
+ {"brkint", input, SANE_SET | REV, BRKINT, 0},
+ {"ignpar", input, REV, IGNPAR, 0},
+ {"parmrk", input, REV, PARMRK, 0},
+ {"inpck", input, REV, INPCK, 0},
+ {"istrip", input, REV, ISTRIP, 0},
+ {"inlcr", input, SANE_UNSET | REV, INLCR, 0},
+ {"igncr", input, SANE_UNSET | REV, IGNCR, 0},
+ {"icrnl", input, SANE_SET | REV, ICRNL, 0},
+ {"ixon", input, REV, IXON, 0},
+ {"ixoff", input, SANE_UNSET | REV, IXOFF, 0},
+ {"tandem", input, REV | OMIT, IXOFF, 0},
+#ifdef IUCLC
+ {"iuclc", input, SANE_UNSET | REV, IUCLC, 0},
+#endif
+#ifdef IXANY
+ {"ixany", input, SANE_UNSET | REV, IXANY, 0},
+#endif
+#ifdef IMAXBEL
+ {"imaxbel", input, SANE_SET | REV, IMAXBEL, 0},
+#endif
+
+ {"opost", output, SANE_SET | REV, OPOST, 0},
+#ifdef OLCUC
+ {"olcuc", output, SANE_UNSET | REV, OLCUC, 0},
+#endif
+#ifdef OCRNL
+ {"ocrnl", output, SANE_UNSET | REV, OCRNL, 0},
+#endif
+#ifdef ONLCR
+ {"onlcr", output, SANE_SET | REV, ONLCR, 0},
+#endif
+#ifdef ONOCR
+ {"onocr", output, SANE_UNSET | REV, ONOCR, 0},
+#endif
+#ifdef ONLRET
+ {"onlret", output, SANE_UNSET | REV, ONLRET, 0},
+#endif
+#ifdef OFILL
+ {"ofill", output, SANE_UNSET | REV, OFILL, 0},
+#endif
+#ifdef OFDEL
+ {"ofdel", output, SANE_UNSET | REV, OFDEL, 0},
+#endif
+#ifdef NLDLY
+ {"nl1", output, SANE_UNSET, NL1, NLDLY},
+ {"nl0", output, SANE_SET, NL0, NLDLY},
+#endif
+#ifdef CRDLY
+ {"cr3", output, SANE_UNSET, CR3, CRDLY},
+ {"cr2", output, SANE_UNSET, CR2, CRDLY},
+ {"cr1", output, SANE_UNSET, CR1, CRDLY},
+ {"cr0", output, SANE_SET, CR0, CRDLY},
+#endif
+#ifdef TABDLY
+ {"tab3", output, SANE_UNSET, TAB3, TABDLY},
+ {"tab2", output, SANE_UNSET, TAB2, TABDLY},
+ {"tab1", output, SANE_UNSET, TAB1, TABDLY},
+ {"tab0", output, SANE_SET, TAB0, TABDLY},
+#else
+# ifdef OXTABS
+ {"tab3", output, SANE_UNSET, OXTABS, 0},
+# endif
+#endif
+#ifdef BSDLY
+ {"bs1", output, SANE_UNSET, BS1, BSDLY},
+ {"bs0", output, SANE_SET, BS0, BSDLY},
+#endif
+#ifdef VTDLY
+ {"vt1", output, SANE_UNSET, VT1, VTDLY},
+ {"vt0", output, SANE_SET, VT0, VTDLY},
+#endif
+#ifdef FFDLY
+ {"ff1", output, SANE_UNSET, FF1, FFDLY},
+ {"ff0", output, SANE_SET, FF0, FFDLY},
+#endif
+
+ {"isig", local, SANE_SET | REV, ISIG, 0},
+ {"icanon", local, SANE_SET | REV, ICANON, 0},
+#ifdef IEXTEN
+ {"iexten", local, SANE_SET | REV, IEXTEN, 0},
+#endif
+ {"echo", local, SANE_SET | REV, ECHO, 0},
+ {"echoe", local, SANE_SET | REV, ECHOE, 0},
+ {"crterase", local, REV | OMIT, ECHOE, 0},
+ {"echok", local, SANE_SET | REV, ECHOK, 0},
+ {"echonl", local, SANE_UNSET | REV, ECHONL, 0},
+ {"noflsh", local, SANE_UNSET | REV, NOFLSH, 0},
+#ifdef XCASE
+ {"xcase", local, SANE_UNSET | REV, XCASE, 0},
+#endif
+#ifdef TOSTOP
+ {"tostop", local, SANE_UNSET | REV, TOSTOP, 0},
+#endif
+#ifdef ECHOPRT
+ {"echoprt", local, SANE_UNSET | REV, ECHOPRT, 0},
+ {"prterase", local, REV | OMIT, ECHOPRT, 0},
+#endif
+#ifdef ECHOCTL
+ {"echoctl", local, SANE_SET | REV, ECHOCTL, 0},
+ {"ctlecho", local, REV | OMIT, ECHOCTL, 0},
+#endif
+#ifdef ECHOKE
+ {"echoke", local, SANE_SET | REV, ECHOKE, 0},
+ {"crtkill", local, REV | OMIT, ECHOKE, 0},
+#endif
+
+ {evenp, combination, REV | OMIT, 0, 0},
+ {parity, combination, REV | OMIT, 0, 0},
+ {stty_oddp, combination, REV | OMIT, 0, 0},
+ {stty_nl, combination, REV | OMIT, 0, 0},
+ {stty_ek, combination, OMIT, 0, 0},
+ {stty_sane, combination, OMIT, 0, 0},
+ {cooked, combination, REV | OMIT, 0, 0},
+ {raw, combination, REV | OMIT, 0, 0},
+ {stty_pass8, combination, REV | OMIT, 0, 0},
+ {litout, combination, REV | OMIT, 0, 0},
+ {cbreak, combination, REV | OMIT, 0, 0},
+#ifdef IXANY
+ {decctlq, combination, REV | OMIT, 0, 0},
+#endif
+#if defined (TABDLY) || defined (OXTABS)
+ {stty_tabs, combination, REV | OMIT, 0, 0},
+#endif
+#if defined(XCASE) && defined(IUCLC) && defined(OLCUC)
+ {stty_lcase, combination, REV | OMIT, 0, 0},
+ {stty_LCASE, combination, REV | OMIT, 0, 0},
+#endif
+ {stty_crt, combination, OMIT, 0, 0},
+ {stty_dec, combination, OMIT, 0, 0},
+};
+
+static const int NUM_mode_info =
+
+ (sizeof(mode_info) / sizeof(struct mode_info));
+
+/* Control character settings. */
+struct control_info {
+ const char *name; /* Name given on command line. */
+ unsigned char saneval; /* Value to set for `stty sane'. */
+ int offset; /* Offset in c_cc. */
+};
+
+/* Control characters. */
+
+static const struct control_info control_info[] = {
+ {"intr", CINTR, VINTR},
+ {"quit", CQUIT, VQUIT},
+ {"erase", CERASE, VERASE},
+ {"kill", CKILL, VKILL},
+ {stty_eof, CEOF, VEOF},
+ {stty_eol, CEOL, VEOL},
+#ifdef VEOL2
+ {"eol2", CEOL2, VEOL2},
+#endif
+#ifdef VSWTCH
+ {stty_swtch, CSWTCH, VSWTCH},
+#endif
+ {"start", CSTART, VSTART},
+ {"stop", CSTOP, VSTOP},
+ {"susp", CSUSP, VSUSP},
+#ifdef VDSUSP
+ {"dsusp", CDSUSP, VDSUSP},
+#endif
+#ifdef VREPRINT
+ {"rprnt", CRPRNT, VREPRINT},
+#endif
+#ifdef VWERASE
+ {"werase", CWERASE, VWERASE},
+#endif
+#ifdef VLNEXT
+ {"lnext", CLNEXT, VLNEXT},
+#endif
+#ifdef VFLUSHO
+ {"flush", CFLUSHO, VFLUSHO},
+#endif
+#ifdef VSTATUS
+ {"status", CSTATUS, VSTATUS},
+#endif
+
+ /* These must be last because of the display routines. */
+ {stty_min, 1, VMIN},
+ {stty_time, 0, VTIME},
+};
+
+static const int NUM_control_info =
+ (sizeof(control_info) / sizeof(struct control_info));
+
+
+static const char *visible(unsigned int ch);
+static unsigned long baud_to_value(speed_t speed);
+static int recover_mode(char *arg, struct termios *mode);
+static int screen_columns(void);
+static int set_mode(const struct mode_info *info,
+ int reversed, struct termios *mode);
+static speed_t string_to_baud(const char *arg);
+static tcflag_t *mode_type_flag(enum mode_type type, struct termios *mode);
+static void display_all(struct termios *mode, int fd,
+ const char *device_name);
+static void display_changed(struct termios *mode);
+static void display_recoverable(struct termios *mode);
+static void display_settings(enum output_type output_type,
+ struct termios *mode, int fd,
+ const char *device_name);
+static void display_speed(struct termios *mode, int fancy);
+static void display_window_size(int fancy, int fd,
+ const char *device_name);
+static void sane_mode(struct termios *mode);
+static void set_control_char(const struct control_info *info,
+ const char *arg, struct termios *mode);
+static void set_speed(enum speed_setting type,
+ const char *arg, struct termios *mode);
+static void set_window_size(int rows, int cols, int fd,
+
+ const char *device_name);
+
+/* The width of the screen, for output wrapping. */
+static int max_col;
+
+/* Current position, to know when to wrap. */
+static int current_col;
+
+/* Print format string MESSAGE and optional args.
+ Wrap to next line first if it won't fit.
+ Print a space first unless MESSAGE will start a new line. */
+
+static void wrapf(const char *message, ...)
+{
+ va_list args;
+ char buf[1024]; /* Plenty long for our needs. */
+ int buflen;
+
+ va_start(args, message);
+ vsprintf(buf, message, args);
+ va_end(args);
+ buflen = strlen(buf);
+ if (current_col + (current_col > 0) + buflen >= max_col) {
+ putchar('\n');
+ current_col = 0;
+ }
+ if (current_col > 0) {
+ putchar(' ');
+ current_col++;
+ }
+ fputs(buf, stdout);
+ current_col += buflen;
+}
+
+static const struct suffix_mult stty_suffixes[] = {
+ {"b", 512},
+ {"k", 1024},
+ {"B", 1024},
+ {NULL, 0}
+};
+
+extern int stty_main(int argc, char **argv)
+{
+ struct termios mode;
+ enum output_type output_type;
+ int optc;
+ int require_set_attr;
+ int speed_was_set;
+ int verbose_output;
+ int recoverable_output;
+ int k;
+ int noargs = 1;
+ char *file_name = NULL;
+ int fd;
+ const char *device_name;
+
+ output_type = changed;
+ verbose_output = 0;
+ recoverable_output = 0;
+
+ /* Don't print error messages for unrecognized options. */
+ opterr = 0;
+
+ while ((optc = getopt(argc, argv, "agF:")) != -1) {
+ switch (optc) {
+ case 'a':
+ verbose_output = 1;
+ output_type = all;
+ break;
+
+ case 'g':
+ recoverable_output = 1;
+ output_type = recoverable;
+ break;
+
+ case 'F':
+ if (file_name)
+ error_msg_and_die("only one device may be specified");
+ file_name = optarg;
+ break;
+
+ default: /* unrecognized option */
+ noargs = 0;
+ break;
+ }
+
+ if (noargs == 0)
+ break;
+ }
+
+ if (optind < argc)
+ noargs = 0;
+
+ /* Specifying both -a and -g gets an error. */
+ if (verbose_output && recoverable_output)
+ error_msg_and_die ("verbose and stty-readable output styles are mutually exclusive");
+
+ /* Specifying any other arguments with -a or -g gets an error. */
+ if (!noargs && (verbose_output || recoverable_output))
+ error_msg_and_die ("modes may not be set when specifying an output style");
+
+ /* FIXME: it'd be better not to open the file until we've verified
+ that all arguments are valid. Otherwise, we could end up doing
+ only some of the requested operations and then failing, probably
+ leaving things in an undesirable state. */
+
+ if (file_name) {
+ int fdflags;
+
+ device_name = file_name;
+ fd = open(device_name, O_RDONLY | O_NONBLOCK);
+ if (fd < 0)
+ perror_msg_and_die("%s", device_name);
+ if ((fdflags = fcntl(fd, F_GETFL)) == -1
+ || fcntl(fd, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
+ perror_msg_and_die("%s: couldn't reset non-blocking mode",
+ device_name);
+ } else {
+ fd = 0;
+ device_name = "standard input";
+ }
+
+ /* 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(fd, &mode))
+ perror_msg_and_die("%s", device_name);
+
+ if (verbose_output || recoverable_output || noargs) {
+ max_col = screen_columns();
+ current_col = 0;
+ display_settings(output_type, &mode, fd, device_name);
+ return EXIT_SUCCESS;
+ }
+
+ speed_was_set = 0;
+ require_set_attr = 0;
+ k = optind;
+ while (k < argc) {
+ int match_found = 0;
+ int reversed = 0;
+ int i;
+
+ if (argv[k][0] == '-') {
+ ++argv[k];
+ reversed = 1;
+ }
+ for (i = 0; i < NUM_mode_info; ++i) {
+ if (STREQ(argv[k], mode_info[i].name)) {
+ match_found = set_mode(&mode_info[i], reversed, &mode);
+ require_set_attr = 1;
+ break;
+ }
+ }
+ if (match_found == 0 && reversed) {
+ error_msg_and_die("invalid argument `%s'", --argv[k]);
+ }
+ if (match_found == 0) {
+ for (i = 0; i < NUM_control_info; ++i) {
+ if (STREQ(argv[k], control_info[i].name)) {
+ if (k == argc - 1) {
+ error_msg_and_die("missing argument to `%s'", argv[k]);
+ }
+ match_found = 1;
+ ++k;
+ set_control_char(&control_info[i], argv[k], &mode);
+ require_set_attr = 1;
+ break;
+ }
+ }
+ }
+ if (match_found == 0) {
+ if (STREQ(argv[k], "ispeed")) {
+ if (k == argc - 1) {
+ error_msg_and_die("missing argument to `%s'", argv[k]);
+ }
+ ++k;
+ set_speed(input_speed, argv[k], &mode);
+ speed_was_set = 1;
+ require_set_attr = 1;
+ } else if (STREQ(argv[k], "ospeed")) {
+ if (k == argc - 1) {
+ error_msg_and_die("missing argument to `%s'", argv[k]);
+ }
+ ++k;
+ set_speed(output_speed, argv[k], &mode);
+ speed_was_set = 1;
+ require_set_attr = 1;
+ }
+#ifdef TIOCGWINSZ
+ else if (STREQ(argv[k], "rows")) {
+ if (k == argc - 1) {
+ error_msg_and_die("missing argument to `%s'", argv[k]);
+ }
+ ++k;
+ set_window_size((int) parse_number(argv[k], stty_suffixes),
+ -1, fd, device_name);
+ } else if (STREQ(argv[k], "cols") || STREQ(argv[k], "columns")) {
+ if (k == argc - 1) {
+ error_msg_and_die("missing argument to `%s'", argv[k]);
+ }
+ ++k;
+ set_window_size(-1,
+ (int) parse_number(argv[k], stty_suffixes),
+ fd, device_name);
+ } else if (STREQ(argv[k], "size")) {
+ max_col = screen_columns();
+ current_col = 0;
+ display_window_size(0, fd, device_name);
+ }
+#endif
+#ifdef HAVE_C_LINE
+ else if (STREQ(argv[k], "line")) {
+ if (k == argc - 1) {
+ error_msg_and_die("missing argument to `%s'", argv[k]);
+ }
+ ++k;
+ mode.c_line = parse_number(argv[k], stty_suffixes);
+ require_set_attr = 1;
+ }
+#endif
+ else if (STREQ(argv[k], "speed")) {
+ max_col = screen_columns();
+ display_speed(&mode, 0);
+ } else if (string_to_baud(argv[k]) != (speed_t) - 1) {
+ set_speed(both_speeds, argv[k], &mode);
+ speed_was_set = 1;
+ require_set_attr = 1;
+ } else {
+ if (recover_mode(argv[k], &mode) == 0) {
+ error_msg_and_die("invalid argument `%s'", argv[k]);
+ }
+ require_set_attr = 1;
+ }
+ }
+ k++;
+ }
+
+ if (require_set_attr) {
+ struct termios new_mode;
+
+ if (tcsetattr(fd, TCSADRAIN, &mode))
+ perror_msg_and_die("%s", device_name);
+
+ /* POSIX (according to Zlotnick's book) tcsetattr returns zero if
+ it performs *any* of the requested operations. This means it
+ can report `success' when it has actually failed to perform
+ some proper subset of the requested operations. To detect
+ this partial failure, get the current terminal attributes and
+ compare them to the requested ones. */
+
+ /* 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(fd, &new_mode))
+ perror_msg_and_die("%s", device_name);
+
+ /* Normally, one shouldn't use memcmp to compare structures that
+ may have `holes' containing uninitialized data, but we have been
+ careful to initialize the storage of these two variables to all
+ zeroes. One might think it more efficient simply to compare the
+ modified fields, but that would require enumerating those fields --
+ and not all systems have the same fields in this structure. */
+
+ if (memcmp(&mode, &new_mode, sizeof(mode)) != 0) {
+#ifdef CIBAUD
+ /* SunOS 4.1.3 (at least) has the problem that after this sequence,
+ tcgetattr (&m1); tcsetattr (&m1); tcgetattr (&m2);
+ sometimes (m1 != m2). The only difference is in the four bits
+ of the c_cflag field corresponding to the baud rate. To save
+ Sun users a little confusion, don't report an error if this
+ happens. But suppress the error only if we haven't tried to
+ set the baud rate explicitly -- otherwise we'd never give an
+ error for a true failure to set the baud rate. */
+
+ new_mode.c_cflag &= (~CIBAUD);
+ if (speed_was_set || memcmp(&mode, &new_mode, sizeof(mode)) != 0)
+#endif
+ {
+ error_msg_and_die ("%s: unable to perform all requested operations",
+ device_name);
+#ifdef TESTING
+ {
+ size_t i;
+
+ printf("new_mode: mode\n");
+ for (i = 0; i < sizeof(new_mode); i++)
+ printf("0x%02x: 0x%02x\n",
+ *(((unsigned char *) &new_mode) + i),
+ *(((unsigned char *) &mode) + i));
+ }
+#endif
+ }
+ }
+ }
+
+ return EXIT_SUCCESS;
+}
+
+/* Return 0 if not applied because not reversible; otherwise return 1. */
+
+static int
+set_mode(const struct mode_info *info, int reversed, struct termios *mode)
+{
+ tcflag_t *bitsp;
+
+ if (reversed && (info->flags & REV) == 0)
+ return 0;
+
+ bitsp = mode_type_flag(info->type, mode);
+
+ if (bitsp == NULL) {
+ /* Combination mode. */
+ if (info->name == evenp || info->name == parity) {
+ if (reversed)
+ mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
+ else
+ mode->c_cflag =
+ (mode->c_cflag & ~PARODD & ~CSIZE) | PARENB | CS7;
+ } else if (info->name == stty_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->name == stty_nl) {
+ if (reversed) {
+ mode->c_iflag = (mode->c_iflag | ICRNL) & ~INLCR & ~IGNCR;
+ mode->c_oflag = (mode->c_oflag
+#ifdef ONLCR
+ | ONLCR
+#endif
+ )
+#ifdef OCRNL
+ & ~OCRNL
+#endif
+#ifdef ONLRET
+ & ~ONLRET
+#endif
+ ;
+ } else {
+ mode->c_iflag = mode->c_iflag & ~ICRNL;
+#ifdef ONLCR
+ mode->c_oflag = mode->c_oflag & ~ONLCR;
+#endif
+ }
+ } else if (info->name == stty_ek) {
+ mode->c_cc[VERASE] = CERASE;
+ mode->c_cc[VKILL] = CKILL;
+ } else if (info->name == stty_sane)
+ sane_mode(mode);
+ else if (info->name == cbreak) {
+ if (reversed)
+ mode->c_lflag |= ICANON;
+ else
+ mode->c_lflag &= ~ICANON;
+ } else if (info->name == stty_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->name == litout) {
+ if (reversed) {
+ mode->c_cflag = (mode->c_cflag & ~CSIZE) | CS7 | PARENB;
+ mode->c_iflag |= ISTRIP;
+ mode->c_oflag |= OPOST;
+ } else {
+ mode->c_cflag = (mode->c_cflag & ~PARENB & ~CSIZE) | CS8;
+ mode->c_iflag &= ~ISTRIP;
+ mode->c_oflag &= ~OPOST;
+ }
+ } else if (info->name == raw || info->name == cooked) {
+ if ((info->name[0] == 'r' && reversed)
+ || (info->name[0] == 'c' && !reversed)) {
+ /* Cooked mode. */
+ mode->c_iflag |= BRKINT | IGNPAR | ISTRIP | ICRNL | IXON;
+ mode->c_oflag |= OPOST;
+ mode->c_lflag |= ISIG | ICANON;
+#if VMIN == VEOF
+ mode->c_cc[VEOF] = CEOF;
+#endif
+#if VTIME == VEOL
+ mode->c_cc[VEOL] = CEOL;
+#endif
+ } else {
+ /* Raw mode. */
+ mode->c_iflag = 0;
+ mode->c_oflag &= ~OPOST;
+ mode->c_lflag &= ~(ISIG | ICANON
+#ifdef XCASE
+ | XCASE
+#endif
+ );
+ mode->c_cc[VMIN] = 1;
+ mode->c_cc[VTIME] = 0;
+ }
+ }
+#ifdef IXANY
+ else if (info->name == decctlq) {
+ if (reversed)
+ mode->c_iflag |= IXANY;
+ else
+ mode->c_iflag &= ~IXANY;
+ }
+#endif
+#ifdef TABDLY
+ else if (info->name == stty_tabs) {
+ if (reversed)
+ mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB3;
+ else
+ mode->c_oflag = (mode->c_oflag & ~TABDLY) | TAB0;
+ }
+#else
+# ifdef OXTABS
+ else if (info->name == stty_tabs) {
+ if (reversed)
+ mode->c_oflag = mode->c_oflag | OXTABS;
+ else
+ mode->c_oflag = mode->c_oflag & ~OXTABS;
+ }
+# endif
+#endif
+#if defined(XCASE) && defined(IUCLC) && defined(OLCUC)
+ else if (info->name == stty_lcase || info->name == stty_LCASE) {
+ if (reversed) {
+ mode->c_lflag &= ~XCASE;
+ mode->c_iflag &= ~IUCLC;
+ mode->c_oflag &= ~OLCUC;
+ } else {
+ mode->c_lflag |= XCASE;
+ mode->c_iflag |= IUCLC;
+ mode->c_oflag |= OLCUC;
+ }
+ }
+#endif
+ else if (info->name == stty_crt)
+ mode->c_lflag |= ECHOE
+#ifdef ECHOCTL
+ | ECHOCTL
+#endif
+#ifdef ECHOKE
+ | ECHOKE
+#endif
+ ;
+ else if (info->name == stty_dec) {
+ mode->c_cc[VINTR] = 3; /* ^C */
+ mode->c_cc[VERASE] = 127; /* DEL */
+ mode->c_cc[VKILL] = 21; /* ^U */
+ mode->c_lflag |= ECHOE
+#ifdef ECHOCTL
+ | ECHOCTL
+#endif
+#ifdef ECHOKE
+ | ECHOKE
+#endif
+ ;
+#ifdef IXANY
+ mode->c_iflag &= ~IXANY;
+#endif
+ }
+ } else if (reversed)
+ *bitsp = *bitsp & ~info->mask & ~info->bits;
+ else
+ *bitsp = (*bitsp & ~info->mask) | info->bits;
+
+ return 1;
+}
+
+static void
+set_control_char(const struct control_info *info, const char *arg,
+ struct termios *mode)
+{
+ unsigned char value;
+
+ if (info->name == stty_min || info->name == stty_time)
+ value = parse_number(arg, stty_suffixes);
+ else if (arg[0] == '\0' || arg[1] == '\0')
+ value = arg[0];
+ else if (STREQ(arg, "^-") || STREQ(arg, "undef"))
+ value = _POSIX_VDISABLE;
+ else if (arg[0] == '^' && arg[1] != '\0') { /* Ignore any trailing junk. */
+ if (arg[1] == '?')
+ value = 127;
+ else
+ value = arg[1] & ~0140; /* Non-letters get weird results. */
+ } else
+ value = parse_number(arg, stty_suffixes);
+ mode->c_cc[info->offset] = value;
+}
+
+static void
+set_speed(enum speed_setting type, const char *arg, struct termios *mode)
+{
+ speed_t baud;
+
+ baud = string_to_baud(arg);
+ if (type == input_speed || type == both_speeds)
+ cfsetispeed(mode, baud);
+ if (type == output_speed || type == both_speeds)
+ cfsetospeed(mode, baud);
+}
+
+#ifdef TIOCGWINSZ
+
+static int get_win_size(int fd, struct winsize *win)
+{
+ int err = ioctl(fd, TIOCGWINSZ, (char *) win);
+
+ return err;
+}
+
+static void
+set_window_size(int rows, int cols, int fd, const char *device_name)
+{
+ struct winsize win;
+
+ if (get_win_size(fd, &win)) {
+ if (errno != EINVAL)
+ perror_msg_and_die("%s", device_name);
+ memset(&win, 0, sizeof(win));
+ }
+
+ if (rows >= 0)
+ win.ws_row = rows;
+ if (cols >= 0)
+ win.ws_col = cols;
+
+# ifdef TIOCSSIZE
+ /* Alexander Dupuy <dupuy@cs.columbia.edu> wrote:
+ The following code deals with a bug in the SunOS 4.x (and 3.x?) kernel.
+ This comment from sys/ttold.h describes Sun's twisted logic - a better
+ test would have been (ts_lines > 64k || ts_cols > 64k || ts_cols == 0).
+ At any rate, the problem is gone in Solaris 2.x. */
+
+ if (win.ws_row == 0 || win.ws_col == 0) {
+ struct ttysize ttysz;
+
+ ttysz.ts_lines = win.ws_row;
+ ttysz.ts_cols = win.ws_col;
+
+ win.ws_row = 1;
+ win.ws_col = 1;
+
+ if (ioctl(fd, TIOCSWINSZ, (char *) &win))
+ perror_msg_and_die("%s", device_name);
+
+ if (ioctl(fd, TIOCSSIZE, (char *) &ttysz))
+ perror_msg_and_die("%s", device_name);
+ return;
+ }
+# endif
+
+ if (ioctl(fd, TIOCSWINSZ, (char *) &win))
+ perror_msg_and_die("%s", device_name);
+}
+
+static void display_window_size(int fancy, int fd, const char *device_name)
+{
+ struct winsize win;
+
+ if (get_win_size(fd, &win)) {
+ if (errno != EINVAL)
+ perror_msg_and_die("%s", device_name);
+ if (!fancy)
+ perror_msg_and_die("%s: no size information for this device",
+ device_name);
+ } else {
+ wrapf(fancy ? "rows %d; columns %d;" : "%d %d\n",
+ win.ws_row, win.ws_col);
+ if (!fancy)
+ current_col = 0;
+ }
+}
+#endif
+
+static int screen_columns(void)
+{
+#ifdef TIOCGWINSZ
+ struct winsize win;
+
+ /* With Solaris 2.[123], this ioctl fails and errno is set to
+ EINVAL for telnet (but not rlogin) sessions.
+ On ISC 3.0, it fails for the console and the serial port
+ (but it works for ptys).
+ It can also fail on any system when stdout isn't a tty.
+ In case of any failure, just use the default. */
+ if (get_win_size(STDOUT_FILENO, &win) == 0 && win.ws_col > 0)
+ return win.ws_col;
+#endif
+
+ if (getenv("COLUMNS"))
+ return atoi(getenv("COLUMNS"));
+ return 80;
+}
+
+static tcflag_t *mode_type_flag(enum mode_type type, struct termios *mode)
+{
+ switch (type) {
+ case control:
+ return &mode->c_cflag;
+
+ case input:
+ return &mode->c_iflag;
+
+ case output:
+ return &mode->c_oflag;
+
+ case local:
+ return &mode->c_lflag;
+
+ default: /* combination: */
+ return NULL;
+ }
+}
+
+static void
+display_settings(enum output_type output_type, struct termios *mode,
+ int fd, const char *device_name)
+{
+ switch (output_type) {
+ case changed:
+ display_changed(mode);
+ break;
+
+ case all:
+ display_all(mode, fd, device_name);
+ break;
+
+ case recoverable:
+ display_recoverable(mode);
+ break;
+ }
+}
+
+static void display_changed(struct termios *mode)
+{
+ int i;
+ int empty_line;
+ tcflag_t *bitsp;
+ unsigned long mask;
+ enum mode_type prev_type = control;
+
+ display_speed(mode, 1);
+#ifdef HAVE_C_LINE
+ wrapf("line = %d;", mode->c_line);
+#endif
+ putchar('\n');
+ current_col = 0;
+
+ empty_line = 1;
+ for (i = 0; control_info[i].name != stty_min; ++i) {
+ if (mode->c_cc[control_info[i].offset] == control_info[i].saneval)
+ continue;
+ /* If swtch is the same as susp, don't print both. */
+#if VSWTCH == VSUSP
+ if (control_info[i].name == stty_swtch)
+ continue;
+#endif
+ /* If eof uses the same slot as min, only print whichever applies. */
+#if VEOF == VMIN
+ if ((mode->c_lflag & ICANON) == 0
+ && (control_info[i].name == stty_eof
+ || control_info[i].name == stty_eol)) continue;
+#endif
+
+ empty_line = 0;
+ wrapf("%s = %s;", control_info[i].name,
+ visible(mode->c_cc[control_info[i].offset]));
+ }
+ if ((mode->c_lflag & ICANON) == 0) {
+ wrapf("min = %d; time = %d;\n", (int) mode->c_cc[VMIN],
+ (int) mode->c_cc[VTIME]);
+ } else if (empty_line == 0)
+ putchar('\n');
+ current_col = 0;
+
+ empty_line = 1;
+ for (i = 0; i < NUM_mode_info; ++i) {
+ if (mode_info[i].flags & OMIT)
+ continue;
+ if (mode_info[i].type != prev_type) {
+ if (empty_line == 0) {
+ putchar('\n');
+ current_col = 0;
+ empty_line = 1;
+ }
+ 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 (mode_info[i].flags & SANE_UNSET) {
+ wrapf("%s", mode_info[i].name);
+ empty_line = 0;
+ }
+ }
+ else if ((mode_info[i].flags & (SANE_SET | REV)) ==
+ (SANE_SET | REV)) {
+ wrapf("-%s", mode_info[i].name);
+ empty_line = 0;
+ }
+ }
+ if (empty_line == 0)
+ putchar('\n');
+ current_col = 0;
+}
+
+static void
+display_all(struct termios *mode, int fd, const char *device_name)
+{
+ int i;
+ tcflag_t *bitsp;
+ unsigned long mask;
+ enum mode_type prev_type = control;
+
+ display_speed(mode, 1);
+#ifdef TIOCGWINSZ
+ display_window_size(1, fd, device_name);
+#endif
+#ifdef HAVE_C_LINE
+ wrapf("line = %d;", mode->c_line);
+#endif
+ putchar('\n');
+ current_col = 0;
+
+ for (i = 0; control_info[i].name != stty_min; ++i) {
+ /* If swtch is the same as susp, don't print both. */
+#if VSWTCH == VSUSP
+ if (control_info[i].name == stty_swtch)
+ continue;
+#endif
+ /* If eof uses the same slot as min, only print whichever applies. */
+#if VEOF == VMIN
+ if ((mode->c_lflag & ICANON) == 0
+ && (control_info[i].name == stty_eof
+ || control_info[i].name == stty_eol)) continue;
+#endif
+ wrapf("%s = %s;", control_info[i].name,
+ visible(mode->c_cc[control_info[i].offset]));
+ }
+#if VEOF == VMIN
+ if ((mode->c_lflag & ICANON) == 0)
+#endif
+ wrapf("min = %d; time = %d;", mode->c_cc[VMIN], mode->c_cc[VTIME]);
+ if (current_col != 0)
+ putchar('\n');
+ current_col = 0;
+
+ for (i = 0; i < NUM_mode_info; ++i) {
+ if (mode_info[i].flags & OMIT)
+ continue;
+ if (mode_info[i].type != prev_type) {
+ putchar('\n');
+ current_col = 0;
+ prev_type = mode_info[i].type;
+ }
+
+ bitsp = mode_type_flag(mode_info[i].type, mode);
+ mask = mode_info[i].mask ? mode_info[i].mask : mode_info[i].bits;
+ if ((*bitsp & mask) == mode_info[i].bits)
+ wrapf("%s", mode_info[i].name);
+ else if (mode_info[i].flags & REV)
+ wrapf("-%s", mode_info[i].name);
+ }
+ putchar('\n');
+ current_col = 0;
+}
+
+static void display_speed(struct termios *mode, int fancy)
+{
+ if (cfgetispeed(mode) == 0 || cfgetispeed(mode) == cfgetospeed(mode))
+ wrapf(fancy ? "speed %lu baud;" : "%lu\n",
+ baud_to_value(cfgetospeed(mode)));
+ else
+ wrapf(fancy ? "ispeed %lu baud; ospeed %lu baud;" : "%lu %lu\n",
+ baud_to_value(cfgetispeed(mode)),
+ baud_to_value(cfgetospeed(mode)));
+ if (!fancy)
+ current_col = 0;
+}
+
+static void display_recoverable(struct termios *mode)
+{
+ 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]);
+ putchar('\n');
+}
+
+static int recover_mode(char *arg, struct termios *mode)
+{
+ int i, n;
+ unsigned int 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;
+}
+
+struct speed_map {
+ speed_t speed; /* Internal form. */
+ unsigned long value; /* Numeric value. */
+};
+
+static const struct speed_map speeds[] = {
+ {B0, 0},
+ {B50, 50},
+ {B75, 75},
+ {B110, 110},
+ {B134, 134},
+ {B150, 150},
+ {B200, 200},
+ {B300, 300},
+ {B600, 600},
+ {B1200, 1200},
+ {B1800, 1800},
+ {B2400, 2400},
+ {B4800, 4800},
+ {B9600, 9600},
+ {B19200, 19200},
+ {B38400, 38400},
+#ifdef B57600
+ {B57600, 57600},
+#endif
+#ifdef B115200
+ {B115200, 115200},
+#endif
+#ifdef B230400
+ {B230400, 230400},
+#endif
+#ifdef B460800
+ {B460800, 460800},
+#endif
+};
+
+static const int NUM_SPEEDS = (sizeof(speeds) / sizeof(struct speed_map));
+
+static speed_t string_to_baud(const char *arg)
+{
+ int i;
+ static const struct suffix_mult stty_zerosuff = { NULL, 0 };
+
+ for (i = 0; i < NUM_SPEEDS; ++i)
+ if (parse_number(arg, &stty_zerosuff) == speeds[i].value)
+ return speeds[i].speed;
+ return (speed_t) - 1;
+}
+
+static unsigned long baud_to_value(speed_t speed)
+{
+ int i;
+
+ for (i = 0; i < NUM_SPEEDS; ++i)
+ if (speed == speeds[i].speed)
+ return speeds[i].value;
+ return 0;
+}
+
+static void sane_mode(struct termios *mode)
+{
+ int i;
+ tcflag_t *bitsp;
+
+ for (i = 0; i < NUM_control_info; ++i) {
+#if VMIN == VEOF
+ if (control_info[i].name == stty_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 & ~mode_info[i].mask) | mode_info[i].bits;
+ } else if (mode_info[i].flags & SANE_UNSET) {
+ bitsp = mode_type_flag(mode_info[i].type, mode);
+ *bitsp = *bitsp & ~mode_info[i].mask & ~mode_info[i].bits;
+ }
+ }
+}
+
+/* Return a string that is the printable representation of character CH. */
+/* Adapted from `cat' by Torbjorn Granlund. */
+
+static const char *visible(unsigned int ch)
+{
+ static char buf[10];
+ char *bpout = buf;
+
+ if (ch == _POSIX_VDISABLE)
+ return "<undef>";
+
+ if (ch >= 32) {
+ if (ch < 127)
+ *bpout++ = ch;
+ else if (ch == 127) {
+ *bpout++ = '^';
+ *bpout++ = '?';
+ } else {
+ *bpout++ = 'M', *bpout++ = '-';
+ if (ch >= 128 + 32) {
+ if (ch < 128 + 127)
+ *bpout++ = ch - 128;
+ else {
+ *bpout++ = '^';
+ *bpout++ = '?';
+ }
+ } else {
+ *bpout++ = '^';
+ *bpout++ = ch - 128 + 64;
+ }
+ }
+ } else {
+ *bpout++ = '^';
+ *bpout++ = ch + 64;
+ }
+ *bpout = '\0';
+ return (const char *) buf;
+}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 20:51:01 +0000