ask-password: allow to control lock and key emoji

Giving --echo to systemd-ask-password allows to echo the user input.
There's nothing secret, so do not show a lock and key emoji by default.

The behavior can be controlled with --emoji=yes|no|auto. The default is
auto, which defaults to yes, unless --echo is given.

3 files changed, 24 insertions, 1 deletions

diff --git a/src/ask-password/ask-password.c b/src/ask-password/ask-password.c
index 09bcefbe66..26cf012f01 100644
--- a/src/ask-password/ask-password.c
+++ b/src/ask-password/ask-password.c
@@ -10,6 +10,7 @@
 #include "log.h"
 #include "macro.h"
 #include "main-func.h"
+#include "parse-argument.h"
 #include "pretty-print.h"
 #include "strv.h"
 #include "terminal-util.h"
@@ -45,6 +46,8 @@ static int help(void) {
                "                      credentials\n"
                "     --timeout=SEC    Timeout in seconds\n"
                "     --echo           Do not mask input (useful for usernames)\n"
+               "     --emoji=yes|no|auto\n"
+               "                      Show a lock and key emoji\n"
                "     --no-tty         Ask question via agent even on TTY\n"
                "     --accept-cached  Accept cached passwords\n"
                "     --multiple       List multiple passwords if available\n"
@@ -64,6 +67,7 @@ static int parse_argv(int argc, char *argv[]) {
                 ARG_ICON = 0x100,
                 ARG_TIMEOUT,
                 ARG_ECHO,
+                ARG_EMOJI,
                 ARG_NO_TTY,
                 ARG_ACCEPT_CACHED,
                 ARG_MULTIPLE,
@@ -80,6 +84,7 @@ static int parse_argv(int argc, char *argv[]) {
                 { "icon",          required_argument, NULL, ARG_ICON          },
                 { "timeout",       required_argument, NULL, ARG_TIMEOUT       },
                 { "echo",          no_argument,       NULL, ARG_ECHO          },
+                { "emoji",         required_argument, NULL, ARG_EMOJI         },
                 { "no-tty",        no_argument,       NULL, ARG_NO_TTY        },
                 { "accept-cached", no_argument,       NULL, ARG_ACCEPT_CACHED },
                 { "multiple",      no_argument,       NULL, ARG_MULTIPLE      },
@@ -90,6 +95,7 @@ static int parse_argv(int argc, char *argv[]) {
                 {}
         };
 
+        const char *emoji = NULL;
         int c;
 
         assert(argc >= 0);
@@ -120,6 +126,10 @@ static int parse_argv(int argc, char *argv[]) {
                         arg_flags |= ASK_PASSWORD_ECHO;
                         break;
 
+                case ARG_EMOJI:
+                        emoji = optarg;
+                        break;
+
                 case ARG_NO_TTY:
                         arg_flags |= ASK_PASSWORD_NO_TTY;
                         break;
@@ -155,6 +165,18 @@ static int parse_argv(int argc, char *argv[]) {
                         assert_not_reached("Unhandled option");
                 }
 
+        if (isempty(emoji) || streq(emoji, "auto"))
+                SET_FLAG(arg_flags, ASK_PASSWORD_HIDE_EMOJI, FLAGS_SET(arg_flags, ASK_PASSWORD_ECHO));
+        else {
+                int r;
+                bool b;
+
+                r = parse_boolean_argument("--emoji=", emoji, &b);
+                if (r < 0)
+                         return r;
+                SET_FLAG(arg_flags, ASK_PASSWORD_HIDE_EMOJI, !b);
+        }
+
         if (argc > optind) {
                 arg_message = strv_join(argv + optind, " ");
                 if (!arg_message)
diff --git a/src/shared/ask-password-api.c b/src/shared/ask-password-api.c
index 0895a24c7f..ccc19f303c 100644
--- a/src/shared/ask-password-api.c
+++ b/src/shared/ask-password-api.c
@@ -421,7 +421,7 @@ int ask_password_tty(
         if (!message)
                 message = "Password:";
 
-        if (emoji_enabled())
+        if (!FLAGS_SET(flags, ASK_PASSWORD_HIDE_EMOJI) && emoji_enabled())
                 message = strjoina(special_glyph(SPECIAL_GLYPH_LOCK_AND_KEY), " ", message);
 
         if (flag_file || ((flags & ASK_PASSWORD_ACCEPT_CACHED) && keyname)) {
diff --git a/src/shared/ask-password-api.h b/src/shared/ask-password-api.h
index bb507b2e8d..7464e7f6de 100644
--- a/src/shared/ask-password-api.h
+++ b/src/shared/ask-password-api.h
@@ -14,6 +14,7 @@ typedef enum AskPasswordFlags {
         ASK_PASSWORD_NO_AGENT      = 1 << 5, /* never ask for password via agent */
         ASK_PASSWORD_CONSOLE_COLOR = 1 << 6, /* Use color if /dev/console points to a console that supports color */
         ASK_PASSWORD_NO_CREDENTIAL = 1 << 7, /* never use $CREDENTIALS_DIRECTORY data */
+        ASK_PASSWORD_HIDE_EMOJI    = 1 << 8, /* hide the lock and key emoji */
 } AskPasswordFlags;
 
 int ask_password_tty(int tty_fd, const char *message, const char *key_name, usec_t until, AskPasswordFlags flags, const char *flag_file, char ***ret);