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authorMichal Soltys <soltys@ziu.info>2016-07-27 00:57:01 +0200
committerMichal Soltys <soltys@ziu.info>2016-07-27 00:57:01 +0200
commit03044059bfff8b79d47efc53e2468e122f502a72 (patch)
tree6fad402f2410661fd33329446521aba10544b245 /src/vconsole
parent042d7f5065c9c19b3f96804f9403b14d910e46d1 (diff)
vconsole: Add generic is_*() functions
is_allocated() and is_allocated_byfd(): Checks if the console is allocated by its index (first function) or its open descriptor (second function). is_settable(): Checks if the console is in xlate or unicode mode, so we can adjust is safely without interfering with X.
Diffstat (limited to 'src/vconsole')
-rw-r--r--src/vconsole/vconsole-setup.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/vconsole/vconsole-setup.c b/src/vconsole/vconsole-setup.c
index 016cf004a0..15e7ed39b4 100644
--- a/src/vconsole/vconsole-setup.c
+++ b/src/vconsole/vconsole-setup.c
@@ -51,6 +51,37 @@ static bool is_vconsole(int fd) {
return ioctl(fd, TIOCLINUX, data) >= 0;
}
+static bool is_allocated(unsigned int idx) {
+ char vcname[strlen("/dev/vcs") + DECIMAL_STR_MAX(int)];
+
+ xsprintf(vcname, "/dev/vcs%i", idx);
+ return access(vcname, F_OK) == 0;
+}
+
+static bool is_allocated_byfd(int fd) {
+ struct vt_stat vcs = {};
+
+ if (ioctl(fd, VT_GETSTATE, &vcs) < 0) {
+ log_warning_errno(errno, "VT_GETSTATE failed: %m");
+ return false;
+ }
+ return is_allocated(vcs.v_active);
+}
+
+static bool is_settable(int fd) {
+ int r, curr_mode;
+
+ r = ioctl(fd, KDGKBMODE, &curr_mode);
+ /*
+ * Make sure we only adjust consoles in K_XLATE or K_UNICODE mode.
+ * Oterwise we would (likely) interfere with X11's processing of the
+ * key events.
+ *
+ * http://lists.freedesktop.org/archives/systemd-devel/2013-February/008573.html
+ */
+ return r == 0 && IN_SET(curr_mode, K_XLATE, K_UNICODE);
+}
+
static int toggle_utf8(int fd, bool utf8) {
int r;
struct termios tc = {};
@@ -262,6 +293,16 @@ int main(int argc, char **argv) {
return EXIT_FAILURE;
}
+ if (!is_allocated_byfd(fd)) {
+ log_error("Virtual console %s is not allocated.", vc);
+ return EXIT_FAILURE;
+ }
+
+ if (!is_settable(fd)) {
+ log_error("Virtual console %s is not in K_XLATE or K_UNICODE.", vc);
+ return EXIT_FAILURE;
+ }
+
utf8 = is_locale_utf8();
r = parse_env_file("/etc/vconsole.conf", NEWLINE,