diff options
Diffstat (limited to 'lib/sh/shtty.c')
| -rw-r--r-- | lib/sh/shtty.c | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/lib/sh/shtty.c b/lib/sh/shtty.c new file mode 100644 index 0000000..0433f5e --- /dev/null +++ b/lib/sh/shtty.c @@ -0,0 +1,330 @@ +/* + * shtty.c -- abstract interface to the terminal, focusing on capabilities. + */ + +/* Copyright (C) 1999 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash 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 3 of the License, or + (at your option) any later version. + + Bash is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif + +#include <shtty.h> + +static TTYSTRUCT ttin, ttout; +static int ttsaved = 0; + +int +ttgetattr(fd, ttp) +int fd; +TTYSTRUCT *ttp; +{ +#ifdef TERMIOS_TTY_DRIVER + return tcgetattr(fd, ttp); +#else +# ifdef TERMIO_TTY_DRIVER + return ioctl(fd, TCGETA, ttp); +# else + return ioctl(fd, TIOCGETP, ttp); +# endif +#endif +} + +int +ttsetattr(fd, ttp) +int fd; +TTYSTRUCT *ttp; +{ +#ifdef TERMIOS_TTY_DRIVER + return tcsetattr(fd, TCSADRAIN, ttp); +#else +# ifdef TERMIO_TTY_DRIVER + return ioctl(fd, TCSETAW, ttp); +# else + return ioctl(fd, TIOCSETN, ttp); +# endif +#endif +} + +void +ttsave() +{ + if (ttsaved) + return; + ttgetattr (0, &ttin); + ttgetattr (1, &ttout); + ttsaved = 1; +} + +void +ttrestore() +{ + if (ttsaved == 0) + return; + ttsetattr (0, &ttin); + ttsetattr (1, &ttout); + ttsaved = 0; +} + +/* Retrieve the internally-saved attributes associated with tty fd FD. */ +TTYSTRUCT * +ttattr (fd) + int fd; +{ + if (ttsaved == 0) + return ((TTYSTRUCT *)0); + if (fd == 0) + return &ttin; + else if (fd == 1) + return &ttout; + else + return ((TTYSTRUCT *)0); +} + +/* + * Change attributes in ttp so that when it is installed using + * ttsetattr, the terminal will be in one-char-at-a-time mode. + */ +int +tt_setonechar(ttp) + TTYSTRUCT *ttp; +{ +#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER) + + /* XXX - might not want this -- it disables erase and kill processing. */ + ttp->c_lflag &= ~ICANON; + + ttp->c_lflag |= ISIG; +# ifdef IEXTEN + ttp->c_lflag |= IEXTEN; +# endif + + ttp->c_iflag |= ICRNL; /* make sure we get CR->NL on input */ + ttp->c_iflag &= ~INLCR; /* but no NL->CR */ + +# ifdef OPOST + ttp->c_oflag |= OPOST; +# endif +# ifdef ONLCR + ttp->c_oflag |= ONLCR; +# endif +# ifdef OCRNL + ttp->c_oflag &= ~OCRNL; +# endif +# ifdef ONOCR + ttp->c_oflag &= ~ONOCR; +# endif +# ifdef ONLRET + ttp->c_oflag &= ~ONLRET; +# endif + + ttp->c_cc[VMIN] = 1; + ttp->c_cc[VTIME] = 0; + +#else + + ttp->sg_flags |= CBREAK; + +#endif + + return 0; +} + +/* Set the tty associated with FD and TTP into one-character-at-a-time mode */ +int +ttfd_onechar (fd, ttp) + int fd; + TTYSTRUCT *ttp; +{ + if (tt_setonechar(ttp) < 0) + return -1; + return (ttsetattr (fd, ttp)); +} + +/* Set the terminal into one-character-at-a-time mode */ +int +ttonechar () +{ + TTYSTRUCT tt; + + if (ttsaved == 0) + return -1; + tt = ttin; + return (ttfd_onechar (0, &tt)); +} + +/* + * Change attributes in ttp so that when it is installed using + * ttsetattr, the terminal will be in no-echo mode. + */ +int +tt_setnoecho(ttp) + TTYSTRUCT *ttp; +{ +#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER) + ttp->c_lflag &= ~(ECHO|ECHOK|ECHONL); +#else + ttp->sg_flags &= ~ECHO; +#endif + + return 0; +} + +/* Set the tty associated with FD and TTP into no-echo mode */ +int +ttfd_noecho (fd, ttp) + int fd; + TTYSTRUCT *ttp; +{ + if (tt_setnoecho (ttp) < 0) + return -1; + return (ttsetattr (fd, ttp)); +} + +/* Set the terminal into no-echo mode */ +int +ttnoecho () +{ + TTYSTRUCT tt; + + if (ttsaved == 0) + return -1; + tt = ttin; + return (ttfd_noecho (0, &tt)); +} + +/* + * Change attributes in ttp so that when it is installed using + * ttsetattr, the terminal will be in eight-bit mode (pass8). + */ +int +tt_seteightbit (ttp) + TTYSTRUCT *ttp; +{ +#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER) + ttp->c_iflag &= ~ISTRIP; + ttp->c_cflag |= CS8; + ttp->c_cflag &= ~PARENB; +#else + ttp->sg_flags |= ANYP; +#endif + + return 0; +} + +/* Set the tty associated with FD and TTP into eight-bit mode */ +int +ttfd_eightbit (fd, ttp) + int fd; + TTYSTRUCT *ttp; +{ + if (tt_seteightbit (ttp) < 0) + return -1; + return (ttsetattr (fd, ttp)); +} + +/* Set the terminal into eight-bit mode */ +int +tteightbit () +{ + TTYSTRUCT tt; + + if (ttsaved == 0) + return -1; + tt = ttin; + return (ttfd_eightbit (0, &tt)); +} + +/* + * Change attributes in ttp so that when it is installed using + * ttsetattr, the terminal will be in non-canonical input mode. + */ +int +tt_setnocanon (ttp) + TTYSTRUCT *ttp; +{ +#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER) + ttp->c_lflag &= ~ICANON; +#endif + + return 0; +} + +/* Set the tty associated with FD and TTP into non-canonical mode */ +int +ttfd_nocanon (fd, ttp) + int fd; + TTYSTRUCT *ttp; +{ + if (tt_setnocanon (ttp) < 0) + return -1; + return (ttsetattr (fd, ttp)); +} + +/* Set the terminal into non-canonical mode */ +int +ttnocanon () +{ + TTYSTRUCT tt; + + if (ttsaved == 0) + return -1; + tt = ttin; + return (ttfd_nocanon (0, &tt)); +} + +/* + * Change attributes in ttp so that when it is installed using + * ttsetattr, the terminal will be in cbreak, no-echo mode. + */ +int +tt_setcbreak(ttp) + TTYSTRUCT *ttp; +{ + if (tt_setonechar (ttp) < 0) + return -1; + return (tt_setnoecho (ttp)); +} + +/* Set the tty associated with FD and TTP into cbreak (no-echo, + one-character-at-a-time) mode */ +int +ttfd_cbreak (fd, ttp) + int fd; + TTYSTRUCT *ttp; +{ + if (tt_setcbreak (ttp) < 0) + return -1; + return (ttsetattr (fd, ttp)); +} + +/* Set the terminal into cbreak (no-echo, one-character-at-a-time) mode */ +int +ttcbreak () +{ + TTYSTRUCT tt; + + if (ttsaved == 0) + return -1; + tt = ttin; + return (ttfd_cbreak (0, &tt)); +} |