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-rw-r--r--libbb/bb_askpass.c4
-rw-r--r--loginutils/sulogin.c4
2 files changed, 5 insertions, 3 deletions
diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c
index fe2b50677..77c1bcd95 100644
--- a/libbb/bb_askpass.c
+++ b/libbb/bb_askpass.c
@@ -65,7 +65,9 @@ char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
i = 0;
while (1) {
int r = read(fd, &ret[i], 1);
- if (r < 0) {
+ if ((i == 0 && r == 0) /* EOF (^D) with no password */
+ || r < 0
+ ) {
/* read is interrupted by timeout or ^C */
ret = NULL;
break;
diff --git a/loginutils/sulogin.c b/loginutils/sulogin.c
index f79802a4d..65e638489 100644
--- a/loginutils/sulogin.c
+++ b/loginutils/sulogin.c
@@ -83,8 +83,8 @@ int sulogin_main(int argc UNUSED_PARAM, char **argv)
cp = bb_ask(STDIN_FILENO, timeout,
"Give root password for system maintenance\n"
"(or type Control-D for normal startup):");
-
- if (!cp || !*cp) {
+ if (!cp) {
+ /* ^D, ^C, timeout, or read error */
bb_info_msg("Normal startup");
return 0;
}