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

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>

3 files changed, 15 insertions, 8 deletions

diff --git a/include/libbb.h b/include/libbb.h
index c7bf33e..646c58b 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1597,9 +1597,11 @@ int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FU
 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_CLEAR_ISIG      (1 << 0)
+#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;
 
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index e8c027f..b4d512b 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -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;
diff --git a/miscutils/less.c b/miscutils/less.c
index 6029b68..938d984 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -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 */