diff options
Diffstat (limited to 'src/getfd.c')
-rw-r--r-- | src/getfd.c | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/src/getfd.c b/src/getfd.c deleted file mode 100644 index 8aa46ca..0000000 --- a/src/getfd.c +++ /dev/null @@ -1,97 +0,0 @@ -/* - * Adapted from kbd-1.12 - * License: GPL - * - */ - -#include "config.h" - -#include <stdio.h> -#include <fcntl.h> -#include <errno.h> -#include <unistd.h> -#ifdef __linux__ -#include <linux/kd.h> -#endif -#include <sys/ioctl.h> - -#ifdef HAVE_PATHS_H -#include <paths.h> -#endif /* HAVE_PATHS_H */ - -/* - * getfd.c - * - * Get an fd for use with kbd/console ioctls. - * We try several things because opening /dev/console will fail - * if someone else used X (which does a chown on /dev/console). - */ - -static int -is_a_console (int fd) -{ - char arg; - int kb_ok; - - arg = 0; - -#ifdef __linux__ - kb_ok = (ioctl (fd, KDGKBTYPE, &arg) == 0 - && ((arg == KB_101) || (arg == KB_84))); -#else - kb_ok = 1; -#endif - - return (isatty (fd) && kb_ok); -} - -static int -open_a_console (char *fnam) -{ - int fd; - - fd = open (fnam, O_RDONLY | O_NOCTTY); - if (fd < 0 && errno == EACCES) - fd = open (fnam, O_WRONLY | O_NOCTTY); - - if (fd < 0) - return -1; - - if (! is_a_console (fd)) { - close (fd); - fd = -1; - } - - return fd; -} - -int getfd (void) -{ - int fd; - -#ifdef _PATH_TTY - fd = open_a_console (_PATH_TTY); - if (fd >= 0) - return fd; -#endif - - fd = open_a_console ("/dev/tty"); - if (fd >= 0) - return fd; - -#ifdef _PATH_CONSOLE - fd = open_a_console (_PATH_CONSOLE); - if (fd >= 0) - return fd; -#endif - - fd = open_a_console ("/dev/console"); - if (fd >= 0) - return fd; - - for (fd = 0; fd < 3; fd++) - if (is_a_console (fd)) - return fd; - - return -1; -} |