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[Bug libc/18921] New: Regression: extraneous stat() and fstat() performed by opendir()
- From: "P at draigBrady dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 03 Sep 2015 22:54:39 +0000
- Subject: [Bug libc/18921] New: Regression: extraneous stat() and fstat() performed by opendir()
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=18921
Bug ID: 18921
Summary: Regression: extraneous stat() and fstat() performed by
opendir()
Product: glibc
Version: 2.22
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: roland at gnu dot org
Reporter: P at draigBrady dot com
CC: drepper.fsp at gmail dot com
Target Milestone: ---
As diagnosed by Bernhard Voelker,
since glibc-2.22 ... and specifically this commit:
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=glibc-2.21-360-g46f894d
opendir(".") has been changed from a simple openat() to this sequence of
stat()+open() as the following diff of `strace ls` outputs indicates:
stat(".", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
-openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
+stat(".", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
+open(".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
+fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
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