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internal: ioctl use /dev/tty instead of fd 0 for VT_GETSTATE (#2989)

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* fix: ioctl use /dev/tty instead of fd 0 for VT_GETSTATE

ioctl VT_GETSTATE on stdin fails if it is not console, such as when
using GDM.  `/dev/tty` should be used instead.

- `/dev/tty` is a synonym for the controlling terminal of a process, if
there is one.

---------

Co-authored-by: Jan Beich <jbeich@FreeBSD.org>
This commit is contained in:
memchr 2023-08-16 08:51:08 +00:00 committed by GitHub
parent 4986d74ef2
commit 63b266cf65
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 6 deletions
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17
src/managers/KeybindManager.cpp
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@ -3,6 +3,7 @@
#include <regex>
#include <sys/ioctl.h>
#include <fcntl.h>
#if defined(__linux__)
#include <linux/vt.h>
#elif defined(__NetBSD__) || defined(__OpenBSD__)
@ -518,15 +519,19 @@ bool CKeybindManager::handleVT(xkb_keysym_t keysym) {
// vtnr is bugged for some reason.
unsigned int ttynum = 0;
int fd;
if ((fd = open("/dev/tty", O_RDONLY | O_NOCTTY)) >= 0) {
#if defined(VT_GETSTATE)
struct vt_stat st;
if (!ioctl(0, VT_GETSTATE, &st))
ttynum = st.v_active;
struct vt_stat st;
if (!ioctl(fd, VT_GETSTATE, &st))
ttynum = st.v_active;
#elif defined(VT_GETACTIVE)
int vt;
if (!ioctl(0, VT_GETACTIVE, &vt))
ttynum = vt;
int vt;
if (!ioctl(fd, VT_GETACTIVE, &vt))
ttynum = vt;
#endif
close(fd);
}
if (ttynum == TTY)
return true;