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LibC: Implement tcflush(3)

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This commit is contained in:
Peter Elliott 2020-07-10 22:19:08 -06:00 • committed by Andreas Kling
parent f4ddca0a73
commit 7a27fa3df8
3 changed files with 11 additions and 3 deletions
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8
Kernel/TTY/TTY.cpp
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@ -329,6 +329,14 @@ int TTY::ioctl(FileDescription&, unsigned request, FlatPtr arg)
if (request == TCSETSF) if (request == TCSETSF)
flush_input(); flush_input();
return 0; return 0;
case TCFLSH:
// Serenity's TTY implementation does not use an output buffer, so ignore TCOFLUSH.
if (arg == TCIFLUSH || arg == TCIOFLUSH) {
flush_input();
} else if (arg != TCOFLUSH) {
return -EINVAL;
}
return 0;
case TIOCGWINSZ: case TIOCGWINSZ:
ws = reinterpret_cast<winsize*>(arg); ws = reinterpret_cast<winsize*>(arg);
if (!current_process.validate_write(ws, sizeof(winsize))) if (!current_process.validate_write(ws, sizeof(winsize)))

2
Libraries/LibC/sys/ioctl_numbers.h
View file

@ -52,6 +52,7 @@ enum IOCtlNumber {
TCSETS, TCSETS,
TCSETSW, TCSETSW,
TCSETSF, TCSETSF,
TCFLSH,
TIOCGWINSZ, TIOCGWINSZ,
TIOCSCTTY, TIOCSCTTY,
TIOCNOTTY, TIOCNOTTY,
@ -75,6 +76,7 @@ enum IOCtlNumber {
#define TCSETS TCSETS #define TCSETS TCSETS
#define TCSETSW TCSETSW #define TCSETSW TCSETSW
#define TCSETSF TCSETSF #define TCSETSF TCSETSF
#define TCFLSH TCFLSH
#define TIOCGWINSZ TIOCGWINSZ #define TIOCGWINSZ TIOCGWINSZ
#define TIOCSCTTY TIOCSCTTY #define TIOCSCTTY TIOCSCTTY
#define TIOCNOTTY TIOCNOTTY #define TIOCNOTTY TIOCNOTTY

4
Libraries/LibC/termios.cpp
View file

@ -60,9 +60,7 @@ int tcflow(int fd, int action)
int tcflush(int fd, int queue_selector) int tcflush(int fd, int queue_selector)
{ {
(void)fd; return ioctl(fd, TCFLSH, queue_selector);
(void)queue_selector;
ASSERT_NOT_REACHED();
} }
speed_t cfgetispeed(const struct termios* tp) speed_t cfgetispeed(const struct termios* tp)