[openwrt/openwrt] base-files: use hwclock --systz

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/157cd0bd97bcfec8a34d4ebb558f37bee4f0515f

commit 157cd0bd97bcfec8a34d4ebb558f37bee4f0515f
Author: Rosen Penev <rosenp at gmail.com>
AuthorDate: Sun Jan 31 16:15:52 2021 -0800

    base-files: use hwclock --systz
    
    The date -k patch is non standard and will be removed in the next
    commit.
    
    Tested behavior to be identical with a simple C program:
    
     #define _GNU_SOURCE
     #include <unistd.h>
     #include <stdio.h>
     #include <sys/time.h>
     #include <sys/syscall.h>
    
    int main()
    {
            struct timezone tt;
            struct timezone tz;
    
            int a = syscall(SYS_gettimeofday, NULL, &tt);
            int b = gettimeofday(NULL, &tz);
            printf("%d - %d, %d\n", a, tt.tz_minuteswest, tt.tz_dsttime);
            printf("%d - %d, %d\n", b, tz.tz_minuteswest, tz.tz_dsttime);
    }
    
    Signed-off-by: Rosen Penev <rosenp at gmail.com>
---
 package/base-files/files/etc/init.d/system | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/base-files/files/etc/init.d/system b/package/base-files/files/etc/init.d/system
index 0e33c522b4..08cf86b97f 100755
--- a/package/base-files/files/etc/init.d/system
+++ b/package/base-files/files/etc/init.d/system
@@ -27,7 +27,7 @@ system_config() {
 		ln -sf "/usr/share/zoneinfo/$zonename" /tmp/localtime && rm -f /tmp/TZ
 
 	# apply timezone to kernel
-	busybox date -k
+	hwclock -u --systz
 }
 
 reload_service() {