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authorDoug Smythies <doug.smythies@gmail.com>2017-04-17 17:12:13 -0700
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-04-19 02:47:28 +0200
commit010a522cf2d9a01612b8a95abd787e70ae123ea6 (patch)
tree8a97fd6c13b6febb983e7a97635a83dde3b672b4 /tools/power
parent4f7d029b9bf009fbee76bb10c0c4351a1870d2f3 (diff)
downloadlinux-010a522cf2d9a01612b8a95abd787e70ae123ea6.tar.bz2
tools/power/x86/intel_pstate_tracer: Adjust directory ownership
The intel_pstate_tracer.py script only needs to be run as root when it is also used to actually acquire the trace data that it will post process. Otherwise it is generally preferable that it be run as a regular user. If run the first time as root the results directory will be incorrect for any subsequent run as a regular user. For any run as root the specific testname subdirectory will not allow any subsequent file saves by a regular user. Typically, and for example, the regular user might be attempting to save a .csv file converted to a spreadsheet with added calculations or graphs. Set the directories and files owner and groups IDs to be the regular user, if required. Signed-off-by: Doug Smythies <dsmythies@telus.net> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/power')
-rwxr-xr-xtools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py17
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py b/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
index fd706ac0f347..0b24dd9d01ff 100755
--- a/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
+++ b/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
@@ -353,6 +353,14 @@ def split_csv():
os.system('grep -m 1 common_cpu cpu.csv > cpu{:0>3}.csv'.format(index))
os.system('grep CPU_{:0>3} cpu.csv >> cpu{:0>3}.csv'.format(index, index))
+def fix_ownership(path):
+ """Change the owner of the file to SUDO_UID, if required"""
+
+ uid = os.environ.get('SUDO_UID')
+ gid = os.environ.get('SUDO_GID')
+ if uid is not None:
+ os.chown(path, int(uid), int(gid))
+
def cleanup_data_files():
""" clean up existing data files """
@@ -518,12 +526,16 @@ else:
if not os.path.exists('results'):
os.mkdir('results')
+ # The regular user needs to own the directory, not root.
+ fix_ownership('results')
os.chdir('results')
if os.path.exists(testname):
print('The test name directory already exists. Please provide a unique test name. Test re-run not supported, yet.')
sys.exit()
os.mkdir(testname)
+# The regular user needs to own the directory, not root.
+fix_ownership(testname)
os.chdir(testname)
# Temporary (or perhaps not)
@@ -566,4 +578,9 @@ plot_scaled_cpu()
plot_boost_cpu()
plot_ghz_cpu()
+# It is preferrable, but not necessary, that the regular user owns the files, not root.
+for root, dirs, files in os.walk('.'):
+ for f in files:
+ fix_ownership(f)
+
os.chdir('../../')