X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fask-password-api.c;h=da967ab7a1a638b10163fef471755a2652809d05;hb=441dfe092acb0f283f7712a80e144b4392b526a0;hp=5d17d4cd52578d542bf1cacecbc17ae3ae8eb753;hpb=2b583ce6576d4a074ce6f1570b3e60b65c64ae7d;p=elogind.git

diff --git a/src/ask-password-api.c b/src/ask-password-api.c
index 5d17d4cd5..da967ab7a 100644
--- a/src/ask-password-api.c
+++ b/src/ask-password-api.c
@@ -18,7 +18,7 @@
   You should have received a copy of the GNU General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
-
+#include <stdbool.h>
 #include <termios.h>
 #include <unistd.h>
 #include <sys/poll.h>
@@ -36,6 +36,18 @@
 
 #include "ask-password-api.h"
 
+static void backspace_chars(int ttyfd, size_t p) {
+
+        if (ttyfd < 0)
+                return;
+
+        while (p > 0) {
+                p--;
+
+                loop_write(ttyfd, "\b \b", 3, false);
+        }
+}
+
 int ask_password_tty(
                 const char *message,
                 usec_t until,
@@ -48,6 +60,8 @@ int ask_password_tty(
         int r, ttyfd = -1, notify = -1;
         struct pollfd pollfd[2];
         bool reset_tty = false;
+        bool silent_mode = false;
+        bool dirty = false;
         enum {
                 POLL_TTY,
                 POLL_INOTIFY
@@ -155,27 +169,50 @@ int ask_password_tty(
 
                 if (c == '\n')
                         break;
-                else if (c == 21) {
-
-                        while (p > 0) {
-                                p--;
+                else if (c == 21) { /* C-u */
 
-                                if (ttyfd >= 0)
-                                        loop_write(ttyfd, "\b \b", 3, false);
-                        }
+                        if (!silent_mode)
+                                backspace_chars(ttyfd, p);
+                        p = 0;
 
                 } else if (c == '\b' || c == 127) {
+
                         if (p > 0) {
+
+                                if (!silent_mode)
+                                        backspace_chars(ttyfd, 1);
+
                                 p--;
+                        } else if (!dirty && !silent_mode) {
+
+                                silent_mode = true;
 
+                                /* There are two ways to enter silent
+                                 * mode. Either by pressing backspace
+                                 * as first key (and only as first key),
+                                 * or ... */
                                 if (ttyfd >= 0)
-                                        loop_write(ttyfd, "\b \b", 3, false);
-                        }
+                                        loop_write(ttyfd, "(no echo) ", 10, false);
+
+                        } else if (ttyfd >= 0)
+                                loop_write(ttyfd, "\a", 1, false);
+
+                } else if (c == '\t' && !silent_mode) {
+
+                        backspace_chars(ttyfd, p);
+                        silent_mode = true;
+
+                        /* ... or by pressing TAB at any time. */
+
+                        if (ttyfd >= 0)
+                                loop_write(ttyfd, "(no echo) ", 10, false);
                 } else {
                         passphrase[p++] = c;
 
-                        if (ttyfd >= 0)
+                        if (!silent_mode && ttyfd >= 0)
                                 loop_write(ttyfd, "*", 1, false);
+
+                        dirty = true;
                 }
         }