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osdep: add qemu_set_tty_echo()

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Using stdin with readline.c requires disabling echo and line buffering.
Add a portable wrapper to set the terminal attributes under Linux and
Windows.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2013-11-14 11:54:16 +01:00 committed by Kevin Wolf
parent 0150cd81cf
commit 13401ba0b9
3 changed files with 39 additions and 0 deletions
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2
include/qemu/osdep.h
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@ -240,4 +240,6 @@ static inline void qemu_init_auxval(char **envp) { }
void qemu_init_auxval(char **envp);
#endif
void qemu_set_tty_echo(int fd, bool echo);
#endif

18
util/oslib-posix.c
View File

@ -47,6 +47,9 @@ extern int daemon(int, int);
# define QEMU_VMALLOC_ALIGN getpagesize()
#endif
#include <termios.h>
#include <unistd.h>
#include <glib/gprintf.h>
#include "config-host.h"
@ -251,3 +254,18 @@ qemu_get_local_state_pathname(const char *relative_pathname)
return g_strdup_printf("%s/%s", CONFIG_QEMU_LOCALSTATEDIR,
relative_pathname);
}
void qemu_set_tty_echo(int fd, bool echo)
{
struct termios tty;
tcgetattr(fd, &tty);
if (echo) {
tty.c_lflag |= ECHO | ECHONL | ICANON | IEXTEN;
} else {
tty.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN);
}
tcsetattr(fd, TCSANOW, &tty);
}

19
util/oslib-win32.c
View File

@ -189,3 +189,22 @@ qemu_get_local_state_pathname(const char *relative_pathname)
return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
relative_pathname);
}
void qemu_set_tty_echo(int fd, bool echo)
{
HANDLE handle = (HANDLE)_get_osfhandle(fd);
DWORD dwMode = 0;
if (handle == INVALID_HANDLE_VALUE) {
return;
}
GetConsoleMode(handle, &dwMode);
if (echo) {
SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
} else {
SetConsoleMode(handle,
dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
}
}