qemu /
qemu /
178b14a0cd8b9063265035aa9ceee37304ef1b9b linux-user: Add support for getting/setting RTC time and alarm using ioctls
This patch implements functionalities of following ioctls:
RTC_RD_TIME - Getting RTC time
Returns this RTC's time in the following structure:
struct rtc_time {
int tm_sec;
int tm_min;
int tm_hour;
int tm_mday;
int tm_mon;
int tm_year;
int tm_wday; /* unused */
int tm_yday; /* unused */
int tm_isdst; /* unused */
};
The fields in this structure have the same meaning and ranges
as the tm structure described in gmtime man page. A pointer
to this structure should be passed as the third ioctl's argument.
RTC_SET_TIME - Setting RTC time
Sets this RTC's time to the time specified by the rtc_time
structure pointed to by the third ioctl's argument. To set
the RTC's time the process must be privileged (i.e., have the
CAP_SYS_TIME capability).
RTC_ALM_READ, RTC_ALM_SET - Getting/Setting alarm time
Read and set the alarm time, for RTCs that support alarms.
The alarm interrupt must be separately enabled or disabled
using the RTC_AIE_ON, RTC_AIE_OFF requests. The third
ioctl's argument is a pointer to a rtc_time structure. Only
the tm_sec, tm_min, and tm_hour fields of this structure are
used.
Implementation notes:
All ioctls in this patch have pointer to a structure rtc_time
as their third argument. That is the reason why corresponding
definition is added in linux-user/syscall_types.h. Since all
elements of this structure are of type 'int', the rest of the
implementation is straightforward.
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Filip Bozuta <Filip.Bozuta@rt-rk.com>
Message-Id: <1579117007-7565-3-git-send-email-Filip.Bozuta@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
3 files changed
