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less: fix fallout from "use common routine to set raw termios"

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Testcase: (sleep 10; ls) | busybox less

[...]
~           LICENSE
~                  Makefile
~                          Makefile.custom
~                                         Makefile.flags
[...]

less did not want this part:
+		/* dont convert NL to CR+NL on output */
+		newterm->c_oflag &= ~(ONLCR);

function                                             old     new   delta
get_termios_and_make_raw                             108     115      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-04-16 10:24:48 +02:00
parent c72499584a
commit 058a153b69
3 changed files with 15 additions and 8 deletions
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6
include/libbb.h
View File

@ -1598,8 +1598,10 @@ int get_terminal_width(int fd) FAST_FUNC;
int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
#define TERMIOS_CLEAR_ISIG (1 << 0)
#define TERMIOS_RAW_CRNL (1 << 1)
#define TERMIOS_RAW_INPUT (1 << 2)
#define TERMIOS_RAW_CRNL_INPUT (1 << 1)
#define TERMIOS_RAW_CRNL_OUTPUT (1 << 2)
#define TERMIOS_RAW_CRNL (TERMIOS_RAW_CRNL_INPUT|TERMIOS_RAW_CRNL_OUTPUT)
#define TERMIOS_RAW_INPUT (1 << 3)
int get_termios_and_make_raw(int fd, struct termios *newterm, struct termios *oldterm, int flags) FAST_FUNC;
int set_termios_to_raw(int fd, struct termios *oldterm, int flags) FAST_FUNC;

13
libbb/xfuncs.c
View File

@ -330,7 +330,6 @@ int FAST_FUNC get_termios_and_make_raw(int fd, struct termios *newterm, struct t
newterm->c_cc[VMIN] = 1;
/* no timeout (reads block forever) */
newterm->c_cc[VTIME] = 0;
if (flags & TERMIOS_RAW_CRNL) {
/* IXON, IXOFF, and IXANY:
* IXOFF=1: sw flow control is enabled on input queue:
* tty transmits a STOP char when input queue is close to full
@ -340,9 +339,12 @@ int FAST_FUNC get_termios_and_make_raw(int fd, struct termios *newterm, struct t
* and resume sending if START is received, or if any char
* is received and IXANY=1.
*/
if (flags & TERMIOS_RAW_CRNL_INPUT) {
/* IXON=0: XON/XOFF chars are treated as normal chars (why we do this?) */
/* dont convert CR to NL on input */
newterm->c_iflag &= ~(IXON | ICRNL);
}
if (flags & TERMIOS_RAW_CRNL_OUTPUT) {
/* dont convert NL to CR+NL on output */
newterm->c_oflag &= ~(ONLCR);
/* Maybe clear more c_oflag bits? Usually, only OPOST and ONLCR are set.
@ -363,9 +365,12 @@ int FAST_FUNC get_termios_and_make_raw(int fd, struct termios *newterm, struct t
#ifndef IXANY
# define IXANY 0
#endif
/* IXOFF=0: disable sending XON/XOFF if input buf is full */
/* IXON=0: input XON/XOFF chars are not special */
/* dont convert anything on input */
/* IXOFF=0: disable sending XON/XOFF if input buf is full
* IXON=0: input XON/XOFF chars are not special
* BRKINT=0: dont send SIGINT on break
* IMAXBEL=0: dont echo BEL on input line too long
* INLCR,ICRNL,IUCLC: dont convert anything on input
*/
newterm->c_iflag &= ~(IXOFF|IXON|IXANY|BRKINT|INLCR|ICRNL|IUCLC|IMAXBEL);
}
return r;

2
miscutils/less.c
View File

@ -1891,7 +1891,7 @@ int less_main(int argc, char **argv)
G.kbd_fd_orig_flags = ndelay_on(tty_fd);
kbd_fd = tty_fd; /* save in a global */
get_termios_and_make_raw(tty_fd, &term_less, &term_orig, TERMIOS_RAW_CRNL);
get_termios_and_make_raw(tty_fd, &term_less, &term_orig, TERMIOS_RAW_CRNL_INPUT);
IF_FEATURE_LESS_ASK_TERMINAL(G.winsize_err =) get_terminal_width_height(tty_fd, &width, &max_displayed_line);
/* 20: two tabstops + 4 */