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test: rtc don't use hard coded major value

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The /dev/rtc device major value may change depending on the
architecture, and kernel release. To ensure the test rtc is working
all the time, we no longer belong on hard coded major value but peek
it from /dev/rtc itself.

Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Laurent Dufour 2015-10-15 18:23:00 +03:00 • committed by Pavel Emelyanov
parent 1ad78171ad
commit da1be409cc
1 changed files with 9 additions and 7 deletions
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16
test/zdtm/live/static/criu-rtc.c
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@ -23,19 +23,21 @@ int cr_plugin_dump_file(int fd, int id)
unsigned char buf[4096];
int img_fd, ret, len;
unsigned long irqp;
struct stat st;
struct stat st, st_rtc;
if (fstat(fd, &st) == -1) {
pr_perror("fstat");
return -1;
}
#if defined(__PPC64__)
#define RTC_DEV_MAJOR 253
#else
#define RTC_DEV_MAJOR 254
#endif
if (major(st.st_rdev) != RTC_DEV_MAJOR || minor(st.st_rdev) != 0)
ret = stat("/dev/rtc", &st_rtc);
if (ret == -1) {
pr_perror("fstat");
return -1;
}
if (major(st.st_rdev) != major(st_rtc.st_rdev) ||
minor(st.st_rdev) != 0)
return -ENOTSUP;
if (ioctl(fd, RTC_IRQP_READ, &irqp) == -1) {