Add portability infrastructure

1 files changed, 33 insertions, 0 deletions

diff --git a/src/os/linux-os_kbspecials.c b/src/os/linux-os_kbspecials.c
new file mode 100644
index 0000000..0d407ab
--- /dev/null
+++ b/src/os/linux-os_kbspecials.c
@@ -0,0 +1,33 @@
+/* ISC license. */
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <signal.h>
+
+#include <sys/reboot.h>
+#include <sys/ioctl.h>
+#include <linux/kd.h>
+
+#include <skalibs/strerr2.h>
+#include <skalibs/sig.h>
+
+#include "os.h"
+
+void os_kbspecials (int inns)
+{
+  int fd ;
+  if (inns) return ;
+  fd = open("/dev/tty0", O_RDONLY | O_NOCTTY) ;
+  if (fd < 0)
+    strerr_warnwu2sys("open /dev/", "tty0 (kbrequest will not be handled)") ;
+  else
+  {
+    if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
+      strerr_warnwu2sys("ioctl KDSIGACCEPT on ", "tty0 (kbrequest will not be handled)") ;
+    close(fd) ;
+  }
+
+  sig_block(SIGINT) ; /* don't panic on early cad before s6-svscan catches it */
+  if (reboot(RB_DISABLE_CAD) == -1)
+    strerr_warnwu1sys("trap ctrl-alt-del") ;
+}