[Fontconfig-bugs] [Bug 95477] New: FcAtomicLock fails when SELinux denies link() syscall with EACCES

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95477

            Bug ID: 95477
           Summary: FcAtomicLock fails when SELinux denies link() syscall
                    with EACCES
           Product: fontconfig
           Version: 2.11
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: library
          Assignee: fontconfig-bugs at lists.freedesktop.org
          Reporter: rodger.combs at gmail.com
        QA Contact: freedesktop at behdad.org

See also: #82358
This is an issue on Android M, which denies non-root users access to link().
Patch:
diff --git a/src/fcatomic.c b/src/fcatomic.c
index 2ce419f..d12d324 100644
--- a/src/fcatomic.c
+++ b/src/fcatomic.c
@@ -131,7 +131,7 @@ FcAtomicLock (FcAtomic *atomic)
        return FcFalse;
     }
     ret = link ((char *) atomic->tmp, (char *) atomic->lck);
-    if (ret < 0 && (errno == EPERM || errno == ENOTSUP))
+    if (ret < 0 && (errno == EPERM || errno == ENOTSUP || errno == EACCES))
     {
        /* the filesystem where atomic->lck points to may not supports
         * the hard link. so better try to fallback

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