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| author | Denys Vlasenko | 2017-01-11 16:17:59 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2017-01-11 16:17:59 +0100 |
| commit | 01ccdd1d3c5221789f1ac62ced12b7984d910705 (patch) | |
| tree | a6eb44f24c1324ddf18bfcec57fd4c3735aa1245 /libbb/xfuncs.c | |
| parent | 8944c67b1f61ca6a51a485772d5d1e6a8ff3d83d (diff) | |
| download | busybox-01ccdd1d3c5221789f1ac62ced12b7984d910705.zip busybox-01ccdd1d3c5221789f1ac62ced12b7984d910705.tar.gz | |
libbb: consolidate the code to set termios unbuffered mode
function old new delta
set_termios_to_raw - 116 +116
count_lines 72 74 +2
powertop_main 1458 1430 -28
top_main 943 914 -29
more_main 759 714 -45
fsck_minix_main 2969 2921 -48
conspy_main 1197 1135 -62
rawmode 99 36 -63
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/6 up/down: 118/-275) Total: -157 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/xfuncs.c')
| -rw-r--r-- | libbb/xfuncs.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c index 45650ed..98d3531 100644 --- a/libbb/xfuncs.c +++ b/libbb/xfuncs.c @@ -311,6 +311,43 @@ int FAST_FUNC tcsetattr_stdin_TCSANOW(const struct termios *tp) return tcsetattr(STDIN_FILENO, TCSANOW, tp); } +int FAST_FUNC set_termios_to_raw(int fd, struct termios *oldterm, int flags) +{ +//TODO: lineedit, microcom and less might be adapted to use this too: +// grep for "tcsetattr" + + struct termios newterm; + + tcgetattr(fd, oldterm); + newterm = *oldterm; + + /* Turn off buffered input (ICANON) + * Turn off echoing (ECHO) + * and separate echoing of newline (ECHONL, normally off anyway) + */ + newterm.c_lflag &= ~(ICANON | ECHO | ECHONL); + if (flags & TERMIOS_CLEAR_ISIG) { + /* dont recognize INT/QUIT/SUSP chars */ + newterm.c_lflag &= ~ISIG; + } + /* reads will block only if < 1 char is available */ + newterm.c_cc[VMIN] = 1; + /* no timeout (reads block forever) */ + newterm.c_cc[VTIME] = 0; + if (flags & TERMIOS_RAW_CRNL) { + /* dont convert CR to NL on input */ + newterm.c_iflag &= ~(IXON | ICRNL); + /* dont convert NL to CR on output */ + newterm.c_oflag &= ~(ONLCR); + } + if (flags & TERMIOS_RAW_INPUT) { + /* dont convert anything on input */ + newterm.c_iflag &= ~(BRKINT|INLCR|ICRNL|IXON|IXOFF|IUCLC|IXANY|IMAXBEL); + } + + return tcsetattr(fd, TCSANOW, &newterm); +} + pid_t FAST_FUNC safe_waitpid(pid_t pid, int *wstat, int options) { pid_t r; |