Powertop2 uses debugfs. Currently it uses /bin/mount to mount
the debugfs. This doesnt work in Android. This patch enables
mounting of debugfs in Android
---
main.cpp | 31 ++++++++++++++++++++++++++++++-
1 files changed, 30 insertions(+), 1 deletions(-)
diff --git a/main.cpp b/main.cpp
index 9fc358c..cb7fcc5 100644
--- a/main.cpp
+++ b/main.cpp
@@ -192,6 +192,22 @@ void out_of_memory()
abort();
}
+bool fileexists(string strFilename)
+{
+ struct stat stFileInfo;
+ bool blnReturn;
+ int intStat;
+
+ // Attempt to get the file attributes
+ intStat = stat(strFilename.c_str(),&stFileInfo);
+ if(intStat == 0)
+ blnReturn = true;
+ else
+ blnReturn = false;
+
+ return(blnReturn);
+}
+
int main(int argc, char **argv)
{
int uid;
@@ -213,7 +229,20 @@ int main(int argc, char **argv)
}
system("/sbin/modprobe cpufreq_stats > /dev/null 2>&1");
system("/sbin/modprobe msr > /dev/null 2>&1");
- system("/bin/mount -t debugfs debugfs /sys/kernel/debug > /dev/null
2>&1");
+ if (!fileexists("/sys/kernel/debug/tracing")) {
+ if (fileexists("/bin/mount")) {
+ system("/bin/mount -t debugfs debugfs /sys/kernel/debug
> /dev/null 2>&1");
+ } else {
+ //system("/sbin/mount -t debugfs debugfs
/sys/kernel/debug"); //doesnt work
+ pid_t child_pid = fork();
+ if(child_pid == 0) {
+ char *args[] = {"mount", "-t", "debugfs",
"debugfs", "/sys/kernel/debug", NULL};
+ execvp(args[0],args);
+ printf("mount failed\n");
+ exit(EXIT_FAILURE);
+ }
+ }
+ }
srand(time(NULL));
--
1.7.0.4
---------------------------------------------------------------------
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