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stty: simplify and ignore BREAK/SIGINT

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It is up to /bin/login, sulogin, or plain shells to unblock SIGINT.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2021-05-30 11:26:41 +02:00
parent 88ec4a55cb
commit 2eaf57fc67
1 changed files with 6 additions and 4 deletions
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src/stty.c
+6 -4
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@@ -27,7 +27,8 @@
#include <sys/ttydefaults.h> /* Not included by default in musl libc */
#include <termios.h>
#include <helpers.h>
#include "helpers.h"
#include "sig.h"
/* B0 means; keep kernel default */
speed_t stty_parse_speed(char *baud)
@@ -90,6 +91,10 @@ speed_t stty_parse_speed(char *baud)
void stty(int fd, speed_t speed)
{
struct termios term;
struct sigaction sa;
/* Ignore SIGINT during login phase, /bin/login resets */
IGNSIG(sa, SIGINT, SA_RESTART);
tcdrain(fd);
if (tcgetattr(fd, &term))
@@ -98,14 +103,12 @@ void stty(int fd, speed_t speed)
if (speed != B0) {
cfsetispeed(&term, speed);
cfsetospeed(&term, speed);
tcsetattr(fd, TCSAFLUSH, &term);
}
/* Modem specific control flags */
term.c_cflag &= ~(PARENB|PARODD|CSTOPB|CRTSCTS);
term.c_cflag |= CS8|HUPCL|CREAD|CLOCAL;
term.c_line = 0;
tcsetattr(fd, TCSAFLUSH, &term);
/* Timeouts, minimum chars and default flags */
term.c_cc[VTIME] = 0;
@@ -113,7 +116,6 @@ void stty(int fd, speed_t speed)
term.c_iflag = ICRNL|IXON|IXOFF;
term.c_oflag = OPOST|ONLCR;
term.c_lflag |= ICANON|ISIG|ECHO|ECHOE|ECHOK|ECHOKE;
tcsetattr(fd, TCSAFLUSH, &term);
/* Reset special characters to defaults */
term.c_cc[VINTR] = CINTR;