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Use uname syscall to get kernel version in Android #19

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Use uname syscall to get kernel version in Android #19

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34 changes: 21 additions & 13 deletions common/clitime.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,9 @@ return "@(#)$Id: clitime.cpp,v 1.77 2013/05/08 20:34:37 bovine Exp $"; }
#include "clitime.h" /* keep the prototypes in sync */
#include "unused.h" /* DNETC_UNUSED_* */
#include "clisync.h"
#ifdef CLIENT_OS == OS_ANDROID
#include <sys/utsname.h>
#endif

#if (CLIENT_OS == OS_NETWARE6)
#include <nks/time.h>
Expand Down Expand Up @@ -603,23 +606,14 @@ int CliGetMonotonicClock( struct timeval *tv )
static int supports_clock_gettime = -1;
if (supports_clock_gettime == -1)
{
int major, minor, version = -1;

#if CLIENT_OS != OS_ANDROID
FILE* fp = fopen("/proc/sys/kernel/osrelease","r");

if (fp)
{
int major, minor, version = -1;

if (fscanf(fp, "%d.%d.%d", &major, &minor, &version) >= 2)
{
/* clock_gettime is supported in Linux 2.6 and beyond
* useful in 2.6.18 and greater */
if (major > 2 || (major == 2 && minor > 6) ||
(major == 2 && minor == 6 && version >= 18))
supports_clock_gettime = 1;
else
supports_clock_gettime = 0;
}
else
if (fscanf(fp, "%d.%d.%d", &major, &minor, &version) < 2)
{
fclose(fp);
return -1; /* failed reading file */
Expand All @@ -631,6 +625,20 @@ int CliGetMonotonicClock( struct timeval *tv )
{
return -1; /* failed opening file */
}
#else
struct utsname name;
if (uname (&name) == -1 ||
sscanf(name.release, "%d.%d.%d", &major, &minor, &version) < 2)
return -1;
#endif

/* clock_gettime is supported in Linux 2.6 and beyond
* useful in 2.6.18 and greater */
if (major > 2 || (major == 2 && minor > 6) ||
(major == 2 && minor == 6 && version >= 18))
supports_clock_gettime = 1;
else
supports_clock_gettime = 0;
}

#if defined(CLOCK_MONOTONIC)
Expand Down