Openmoko Bug #2199: bitbake wpa-supplicant-0.6.3 fails (OSError)
Openmoko Public Trac
bugs at docs.openmoko.org
Tue Jan 6 06:56:44 CET 2009
#2199: bitbake wpa-supplicant-0.6.3 fails (OSError)
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Reporter: cfriedt | Owner: openmoko-kernel
Type: defect | Status: reopened
Priority: normal | Milestone:
Component: System Software | Version:
Severity: normal | Resolution:
Keywords: wpa-supplicant OSError | Haspatch: 0
Blockedby: | Estimated:
Patchreview: | Blocking:
Reproducible: |
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Comment(by cfriedt):
Well, I've identified the culprit in my issue. It seems that while
examining bitbake encounters an Error 13 (EPERM) causing the build to
fail.
Checking out packages/wpa-supplicant/wpa-suplicant-0.6.inc, at around line
65, I noticed that there are two symbolic links created in the image dir.
do_install () {
...
ln -s /etc/wpa_supplicant/ifupdown.sh ${D}${sysconfdir}/network
/if-pre-up.d/wpasupplicant
ln -s /etc/wpa_supplicant/ifupdown.sh ${D}${sysconfdir}/network
/if-post-down.d/wpasupplicant
...
}
On my machine, /etc/wpa_supplicant is owned by root:root and has mode 750.
Hence the EPERM.
Now - rule #1 - there should be no access to files on the build system by
bitbake during the install stage at all. By (obvious?) inspection, there
really is none! The install process is instructed to create a symbolic
link called 'etc/network/if-pre-up.d/wpasupplicant' to point to a location
(/etc/wpa_supplicant/ifupdown.sh). The location that any symbolic link
points to should be (to some extent) irrelevent.
So I looked into openembedded/classes/package.bbclass, where the exception
was coming from, around line 450, stat() is called on the file in the
image directory ($D). When stat() is called on the symbolic link, it
actually follows the symbolic link, causing the EPERM.
A slight modification of package.bbclass is necessary in my opinion, so
that inappropriate stat() calls are not made to symbolic links.
Does anyone know how? I'm still a bit of a n00b when it comes to python.
--
Ticket URL: <https://docs.openmoko.org/trac/ticket/2199#comment:4>
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