[Bug 480512] New: fontconfig - fc-cache refuses to write caches

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Summary: fontconfig - fc-cache refuses to write caches

https://bugzilla.redhat.com/show_bug.cgi?id=480512

           Summary: fontconfig - fc-cache refuses to write caches
           Product: Fedora
           Version: rawhide
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: medium
          Priority: low
         Component: fontconfig
        AssignedTo: besfahbo at redhat.com
        ReportedBy: michal at harddata.com
         QAContact: extras-qa at fedoraproject.org
                CC: besfahbo at redhat.com, fedora-fonts-bugs-list at redhat.com
    Classification: Fedora


Description of problem:

The latest rawhide updates on my system brought the following fonts:

bitstream-vera-sans-fonts
bitstream-vera-sans-mono-fonts
bitstream-vera-serif-fonts
dejavu-lgc-sans-fonts
dejavu-lgc-sans-mono-fonts
dejavu-lgc-serif-fonts
dejavu-sans-fonts
dejavu-sans-mono-fonts
dejavu-serif-fonts

With every of those packages I got a message like this:

/usr/share/fonts/dejavu: failed to write cache

It turns out that messages are coming from /usr/bin/fc-cache and running
'/usr/bin/fc-cache -v /usr/share/fonts/dejavu' produces the following:

/usr/share/fonts/dejavu: caching, new cache contents: 42 fonts, 0 dirs
/usr/share/fonts/dejavu: failed to write cache
/var/cache/fontconfig: cleaning cache directory
/root/.fontconfig: not cleaning non-existent cache directory
/usr/bin/fc-cache: failed

Check with strace reveals what follows:

open("/var/cache/fontconfig/12b26b760a24f8b4feb03ad48a333a72-x86-64.cache-2",
O_
RDONLY) = -1 ENOENT (No such file or directory)
open("/root/.fontconfig/12b26b760a24f8b4feb03ad48a333a72-x86-64.cache-2",
O_RDON
LY) = -1 ENOENT (No such file or directory)
write(2, "/usr/share/fonts/dejavu: failed t"..., 47) = 47
unlink("/var/cache/fontconfig/12b26b760a24f8b4feb03ad48a333a72-x86-64.cache-2") 
= -1 ENOENT (No such file or directory)
unlink("/root/.fontconfig/12b26b760a24f8b4feb03ad48a333a72-x86-64.cache-2") =
-1
 ENOENT (No such file or directory)

Attempts to open new files with O_RDONLY?  I do not think that this is going to
work.

Version-Release number of selected component (if applicable):
fontconfig-2.6.90-3.git.63.g6bb4b9a.fc11.x86_64

How reproducible:
On every try.

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