Allow keyboard operations to be interrupted by the interrupt or quit

character.

diff --git a/lib/isc/unix/include/isc/keyboard.h b/lib/isc/unix/include/isc/keyboard.h
index 1ed4f8f40053a0b6b5f6415835fd878e8add6294..7bd9e89f6ea55caf0d0fb869903a2fc2d4adb960 100644 (file)
--- a/lib/isc/unix/include/isc/keyboard.h
+++ b/lib/isc/unix/include/isc/keyboard.h
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: keyboard.h,v 1.3 2000/07/27 09:53:03 tale Exp $ */
+/* $Id: keyboard.h,v 1.4 2000/07/31 20:36:08 bwelling Exp $ */
 
 #ifndef ISC_KEYBOARD_H
 #define ISC_KEYBOARD_H 1
@@ -30,6 +30,7 @@ ISC_LANG_BEGINDECLS
 typedef struct {
        int fd;
        struct termios saved_mode;
+       isc_result_t result;
 } isc_keyboard_t;
 
 isc_result_t
@@ -41,6 +42,9 @@ isc_keyboard_close(isc_keyboard_t *keyboard, unsigned int sleepseconds);
 isc_result_t
 isc_keyboard_getchar(isc_keyboard_t *keyboard, unsigned char *cp);
 
+isc_boolean_t
+isc_keyboard_canceled(isc_keyboard_t *keyboard);
+
 ISC_LANG_ENDDECLS
 
 #endif /* ISC_KEYBOARD_H */

diff --git a/lib/isc/unix/keyboard.c b/lib/isc/unix/keyboard.c
index 553f72eadc261b5414e671845c10a6c55f3c4ddd..beb5b4d30b4178ff1244554572342199cf94fa0a 100644 (file)
--- a/lib/isc/unix/keyboard.c
+++ b/lib/isc/unix/keyboard.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: keyboard.c,v 1.5 2000/07/27 09:52:49 tale Exp $ */
+/* $Id: keyboard.c,v 1.6 2000/07/31 20:36:07 bwelling Exp $ */
 
 #include <config.h>
 
@@ -69,6 +69,8 @@ isc_keyboard_open(isc_keyboard_t *keyboard) {
                goto errout;
        }
 
+       keyboard->result = ISC_R_SUCCESS;
+
        return (ISC_R_SUCCESS);
 
  errout:
@@ -81,7 +83,7 @@ isc_result_t
 isc_keyboard_close(isc_keyboard_t *keyboard, unsigned int sleeptime) {
        REQUIRE(keyboard != NULL);
 
-       if (sleeptime > 0)
+       if (sleeptime > 0 && keyboard->result != ISC_R_CANCELED)
                (void)sleep(sleeptime);
 
        (void)tcsetattr(keyboard->fd, TCSAFLUSH, &keyboard->saved_mode);
@@ -96,15 +98,29 @@ isc_result_t
 isc_keyboard_getchar(isc_keyboard_t *keyboard, unsigned char *cp) {
        ssize_t cc;
        unsigned char c;
+       cc_t *controlchars;
 
        REQUIRE(keyboard != NULL);
        REQUIRE(cp != NULL);
 
        cc = read(keyboard->fd, &c, 1);
-       if (cc < 0)
-               return (ISC_R_IOERROR);
+       if (cc < 0) {
+               keyboard->result = ISC_R_IOERROR;
+               return (keyboard->result);
+       }
+
+       controlchars = keyboard->saved_mode.c_cc;
+       if (c == controlchars[VINTR] || c == controlchars[VQUIT]) {
+               keyboard->result = ISC_R_CANCELED;
+               return (keyboard->result);
+       }
 
        *cp = c;
 
        return (ISC_R_SUCCESS);
 }
+
+isc_boolean_t
+isc_keyboard_canceled(isc_keyboard_t *keyboard) {
+       return (keyboard->result == ISC_R_CANCELED);
+}