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getty.c: Ignore signals like SIGINT, SIGHUP

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Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson
2017-08-30 17:19:12 +02:00
parent 55c12aa6f6
commit 907595d9ed
1 changed files with 9 additions and 4 deletions
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src/getty.c
+9 -4
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@@ -87,7 +87,8 @@ static void stty(int fd, speed_t speed, int noclear)
term.c_iflag = ICRNL|IXON|IXOFF; term.c_iflag = ICRNL|IXON|IXOFF;
term.c_oflag = OPOST|ONLCR; term.c_oflag = OPOST|ONLCR;
term.c_cflag |= CS8|CREAD|HUPCL|CBAUDEX; term.c_cflag |= CS8|CREAD|HUPCL|CBAUDEX;
term.c_lflag |= ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOKE; term.c_lflag |= ICANON|ECHO|ECHOE|ECHOK|ECHOKE;
term.c_lflag &= ~ISIG;
/* Reset special characters to defaults */ /* Reset special characters to defaults */
term.c_cc[VINTR] = CTRL('C'); term.c_cc[VINTR] = CTRL('C');
@@ -320,13 +321,17 @@ int getty(char *tty, char *baud, char *term, int noclear, char *user)
warn("Failed TIOCSCTTY"); warn("Failed TIOCSCTTY");
/* /*
* Don't let QUIT dump core. * Ignore a few signals, needed to prevent Ctrl-C at login:
* prompt and to prevent QUIT from dumping core.
*/ */
sigemptyset(&sa.sa_mask); sigemptyset(&sa.sa_mask);
sa.sa_flags = 0; sa.sa_flags = SA_RESTART;
sa.sa_handler = _exit; sa.sa_handler = SIG_IGN;
sigaction(SIGHUP, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGQUIT, &sa, NULL); sigaction(SIGQUIT, &sa, NULL);
/* Set up TTY */
stty(fd, speed, noclear); stty(fd, speed, noclear);
close(fd); close(fd);
utmp_set_login(tty, NULL); utmp_set_login(tty, NULL);