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authorEric Paris <eparis@redhat.com>2008-11-11 21:48:07 +1100
committerJames Morris <jmorris@namei.org>2008-11-11 21:48:07 +1100
commit9d36be76c55ad2c2bb29683b752b0d9ad2e4eeef (patch)
treedc193d694a65dc64740928858432af7bb623d010 /include/linux/capability.h
parent39c9aede2b4a252bd296c0a86be832c3d3d0a273 (diff)
downloadlinux-linaro-stable-9d36be76c55ad2c2bb29683b752b0d9ad2e4eeef.tar.gz
Document the order of arguments for cap_issubset. It's not instantly clear
which order the argument should be in. So give an example. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'include/linux/capability.h')
-rw-r--r--include/linux/capability.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/capability.h b/include/linux/capability.h
index 5bc145bd759a..b5750d0b96e0 100644
--- a/include/linux/capability.h
+++ b/include/linux/capability.h
@@ -457,6 +457,13 @@ static inline int cap_isclear(const kernel_cap_t a)
return 1;
}
+/*
+ * Check if "a" is a subset of "set".
+ * return 1 if ALL of the capabilities in "a" are also in "set"
+ * cap_issubset(0101, 1111) will return 1
+ * return 0 if ANY of the capabilities in "a" are not in "set"
+ * cap_issubset(1111, 0101) will return 0
+ */
static inline int cap_issubset(const kernel_cap_t a, const kernel_cap_t set)
{
kernel_cap_t dest;