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https://github.com/sheumann/hush.git
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Revise terminal control code to use ioctls supported by GNO instead of termios calls that aren't supported.
This commit is contained in:
Stephen Heumann
parent
7e5a584f0c
commit
a3c32aaa73
@ -35,6 +35,16 @@
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#undef basename
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#define basename dont_use_basename
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#include "poll.h"
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/* Don't include termios.h in GNO because termios isn't actually implemented,
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* but the header has a define for ECHO that conflicts with the one needed for
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* the ioctls that we use instead. Do define USE_OLD_TTY before including
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* <sys/ioctl.h>, which is needed to get defines for those ioctls.
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*/
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#ifndef __GNO__
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# include <termios.h>
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#else
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# define USE_OLD_TTY
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#endif
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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@ -44,7 +54,6 @@
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# include <sys/sysmacros.h>
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#endif
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#include <sys/wait.h>
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#include <termios.h>
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#include <time.h>
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#include <sys/param.h>
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#include <pwd.h>
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@ -119,9 +128,6 @@
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#ifndef HAVE_FDATASYNC
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# define fdatasync fsync
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#endif
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#ifndef HAVE_XTABS
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# define XTABS TAB3
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#endif
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/* Some libc's forget to declare these, do it ourself */
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@ -1115,8 +1121,6 @@ extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
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extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
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#endif
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extern void erase_mtab(const char * name) FAST_FUNC;
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extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
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extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
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#if ENABLE_DESKTOP
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extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
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#else
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@ -1269,7 +1273,9 @@ char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
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/* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
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int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
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#ifndef __GNO__
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int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
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#endif
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/* NB: "unsigned request" is crucial! "int request" will break some arches! */
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int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
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@ -2247,14 +2247,24 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
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#if ENABLE_FEATURE_EDITING_VI
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smallint vi_cmdmode = 0;
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#endif
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#ifndef __GNO__
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struct termios initial_settings;
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struct termios new_settings;
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#else
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struct sgttyb initial_settings;
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struct sgttyb new_settings;
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#endif
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char read_key_buffer[KEYCODE_BUFFER_SIZE];
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INIT_S();
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#ifndef __GNO__
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if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
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|| !(initial_settings.c_lflag & ECHO)
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#else
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if (ioctl(STDIN_FILENO, TIOCGETP, &initial_settings) < 0
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|| !(initial_settings.sg_flags & ECHO)
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#endif
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) {
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/* Happens when e.g. stty -echo was run before */
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parse_and_put_prompt(prompt);
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@ -2298,6 +2308,7 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
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#define command command_must_not_be_used
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new_settings = initial_settings;
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#ifndef __GNO__
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/* ~ICANON: unbuffered input (most c_cc[] are disabled, VMIN/VTIME are enabled) */
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/* ~ECHO, ~ECHONL: turn off echoing, including newline echoing */
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/* ~ISIG: turn off INTR (ctrl-C), QUIT, SUSP */
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@ -2310,6 +2321,11 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
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/* Turn off CTRL-C */
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/* new_settings.c_cc[VINTR] = _POSIX_VDISABLE; */
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tcsetattr_stdin_TCSANOW(&new_settings);
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#else
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new_settings.sg_flags |= CBREAK;
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new_settings.sg_flags &= ~ECHO;
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ioctl(STDIN_FILENO, TIOCSETN, &new_settings);
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#endif
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#if ENABLE_USERNAME_OR_HOMEDIR
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{
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@ -2682,8 +2698,12 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
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break;
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default:
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#ifndef __GNO__
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if (initial_settings.c_cc[VINTR] != 0
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&& ic_raw == initial_settings.c_cc[VINTR]
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#else
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if (ic_raw == CINTR
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#endif
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) {
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/* Ctrl-C (usually) - stop gathering input */
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goto_new_line();
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@ -2691,8 +2711,12 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
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break_out = -1; /* "do not append '\n'" */
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break;
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}
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#ifndef __GNO__
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if (initial_settings.c_cc[VEOF] != 0
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&& ic_raw == initial_settings.c_cc[VEOF]
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#else
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if (ic_raw == CEOF
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#endif
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) {
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/* Ctrl-D (usually) - delete one character,
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* or exit if len=0 and no chars to delete */
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@ -2806,7 +2830,11 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
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#endif
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/* restore initial_settings */
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#ifndef __GNO__
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tcsetattr_stdin_TCSANOW(&initial_settings);
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#else
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ioctl(STDIN_FILENO, TIOCSETN, &initial_settings);
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#endif
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/* restore SIGWINCH handler */
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signal(SIGWINCH, previous_SIGWINCH_handler);
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fflush_all();
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@ -277,10 +277,12 @@ int FAST_FUNC get_terminal_width_height(int fd, unsigned *width, unsigned *heigh
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return err;
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}
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#ifndef __GNO__
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int FAST_FUNC tcsetattr_stdin_TCSANOW(const struct termios *tp)
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{
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return tcsetattr(STDIN_FILENO, TCSANOW, tp);
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}
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#endif
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pid_t FAST_FUNC safe_waitpid(pid_t pid, wait_status_t *wstat, int options)
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{
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@ -62,7 +62,11 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val),
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int nchars; /* -n NUM */
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char **pp;
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char *buffer;
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#ifndef __GNO__
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struct termios tty, old_tty;
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#else
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struct sgttyb tty, old_tty;
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#endif
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const char *retval;
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int bufpos; /* need to be able to hold -1 */
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int startword;
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@ -134,9 +138,14 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val),
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ifs = defifs;
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if (nchars || (read_flags & BUILTIN_READ_SILENT)) {
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#ifndef __GNO__
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tcgetattr(fd, &tty);
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#else
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ioctl(fd, TIOCGETP, &tty);
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#endif
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old_tty = tty;
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if (nchars) {
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#ifndef __GNO__
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tty.c_lflag &= ~ICANON;
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// Setting it to more than 1 breaks poll():
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// it blocks even if there's data. !??
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@ -145,15 +154,26 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val),
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tty.c_cc[VMIN] = 1;
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/* no timeout (reads block forever) */
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tty.c_cc[VTIME] = 0;
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#else
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tty.sg_flags |= CBREAK;
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#endif
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}
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if (read_flags & BUILTIN_READ_SILENT) {
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#ifndef __GNO__
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tty.c_lflag &= ~(ECHO | ECHOK | ECHONL);
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#else
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tty.sg_flags &= ~ECHO;
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#endif
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}
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/* This forces execution of "restoring" tcgetattr later */
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read_flags |= BUILTIN_READ_SILENT;
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/* if tcgetattr failed, tcsetattr will fail too.
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* Ignoring, it's harmless. */
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#ifndef __GNO__
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tcsetattr(fd, TCSANOW, &tty);
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#else
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ioctl(fd, TIOCSETN, &tty);
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#endif
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}
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retval = (const char *)(uintptr_t)0;
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@ -267,7 +287,11 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val),
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ret:
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free(buffer);
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if (read_flags & BUILTIN_READ_SILENT)
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#ifndef __GNO__
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tcsetattr(fd, TCSANOW, &old_tty);
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#else
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ioctl(fd, TIOCSETN, &old_tty);
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#endif
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errno = err;
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return retval;
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