diff options
Diffstat (limited to 'util-linux/hwclock.c')
| -rw-r--r-- | util-linux/hwclock.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/util-linux/hwclock.c b/util-linux/hwclock.c index ca4238f..86235e9 100644 --- a/util-linux/hwclock.c +++ b/util-linux/hwclock.c @@ -35,16 +35,22 @@ struct linux_rtc_time { # endif #endif +static const char *rtcname; + static int xopen_rtc(int flags) { int rtc; - rtc = open("/dev/rtc", flags); - if (rtc < 0) { - rtc = open("/dev/misc/rtc", flags); - if (rtc < 0) - bb_perror_msg_and_die("cannot access RTC"); + + if (!rtcname) { + rtc = open("/dev/rtc", flags); + if (rtc >= 0) + return rtc; + rtc = open("/dev/rtc0", flags); + if (rtc >= 0) + return rtc; + rtcname = "/dev/misc/rtc"; } - return rtc; + return xopen(rtcname, flags); } static time_t read_rtc(int utc) @@ -175,6 +181,7 @@ static int check_utc(void) #define HWCLOCK_OPT_SHOW 0x04 #define HWCLOCK_OPT_HCTOSYS 0x08 #define HWCLOCK_OPT_SYSTOHC 0x10 +#define HWCLOCK_OPT_RTCFILE 0x20 int hwclock_main(int argc, char **argv ); int hwclock_main(int argc, char **argv ) @@ -189,12 +196,13 @@ int hwclock_main(int argc, char **argv ) { "show", 0, 0, 'r' }, { "hctosys", 0, 0, 's' }, { "systohc", 0, 0, 'w' }, + { "file", 1, 0, 'f' }, { 0, 0, 0, 0 } }; applet_long_options = hwclock_long_options; #endif opt_complementary = "?:r--ws:w--rs:s--wr:l--u:u--l"; - opt = getopt32(argc, argv, "lursw"); + opt = getopt32(argc, argv, "lurswf:", &rtcname); /* If -u or -l wasn't given check if we are using utc */ if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME)) |