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-rw-r--r--meta/recipes-core/busybox/busybox-1.21.1/busybox-sulogin-empty-root-password.patch58
1 files changed, 58 insertions, 0 deletions
diff --git a/meta/recipes-core/busybox/busybox-1.21.1/busybox-sulogin-empty-root-password.patch b/meta/recipes-core/busybox/busybox-1.21.1/busybox-sulogin-empty-root-password.patch
new file mode 100644
index 0000000000..baad298a3f
--- /dev/null
+++ b/meta/recipes-core/busybox/busybox-1.21.1/busybox-sulogin-empty-root-password.patch
@@ -0,0 +1,58 @@
1Upstream-Status: Backport
2Signed-off-by: Jonathan Liu <net147@gmail.com>
3
4From b6dc13c2d3754704b1bf5af4e6b957b48585102f Mon Sep 17 00:00:00 2001
5From: Jonathan Liu <net147@gmail.com>
6Date: Tue, 21 May 2013 17:01:55 +0200
7Subject: [PATCH] sulogin: allow system maintenance login if root password is
8 empty
9
10The current password checking is unable to distinguish between the user
11entering an empty password or pressing Control-D. As a result, an empty
12password always results in normal startup.
13
14We modify bb_ask to return NULL if Control-D is pressed without entering
15a password. The sulogin applet is then modified to only proceed to
16normal startup if bb_ask returns NULL. This covers EOF with no password,
17interrupt by timeout and ^C.
18
19Signed-off-by: Jonathan Liu <net147@gmail.com>
20Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
21---
22 libbb/bb_askpass.c | 4 +++-
23 loginutils/sulogin.c | 4 ++--
24 2 files changed, 5 insertions(+), 3 deletions(-)
25
26diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c
27index fe2b506..77c1bcd 100644
28--- a/libbb/bb_askpass.c
29+++ b/libbb/bb_askpass.c
30@@ -65,7 +65,9 @@ char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
31 i = 0;
32 while (1) {
33 int r = read(fd, &ret[i], 1);
34- if (r < 0) {
35+ if ((i == 0 && r == 0) /* EOF (^D) with no password */
36+ || r < 0
37+ ) {
38 /* read is interrupted by timeout or ^C */
39 ret = NULL;
40 break;
41diff --git a/loginutils/sulogin.c b/loginutils/sulogin.c
42index f79802a..65e6384 100644
43--- a/loginutils/sulogin.c
44+++ b/loginutils/sulogin.c
45@@ -83,8 +83,8 @@ int sulogin_main(int argc UNUSED_PARAM, char **argv)
46 cp = bb_ask(STDIN_FILENO, timeout,
47 "Give root password for system maintenance\n"
48 "(or type Control-D for normal startup):");
49-
50- if (!cp || !*cp) {
51+ if (!cp) {
52+ /* ^D, ^C, timeout, or read error */
53 bb_info_msg("Normal startup");
54 return 0;
55 }
56--
571.8.2.3
58