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9eb9c93275
In attempting to enable building various part of Android with -Wall -Werror, we found that the const security_context_t declarations in libselinux are incorrect; const char * was intended, but const security_context_t translates to char * const and triggers warnings on passing const char * from the caller. Easiest fix is to replace them all with const char *. And while we are at it, just get rid of all usage of security_context_t itself as it adds no value - there is no true encapsulation of the security context strings and callers already directly use string functions on them. typedef left to permit building legacy users until such a time as all are updated. This is a port of Change-Id I2f9df7bb9f575f76024c3e5f5b660345da2931a7 from Android, augmented to deal with all of the other code in upstream libselinux and updating the man pages too. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: Eric Paris <eparis@redhat.com>
75 lines
1.2 KiB
Groff
75 lines
1.2 KiB
Groff
.TH "selinux_file_context_cmp" "3" "08 March 2011" "SELinux API documentation"
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.SH "NAME"
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selinux_file_context_cmp \- Compare two SELinux security contexts excluding the 'user' component
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.
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.SH "SYNOPSIS"
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.B #include <selinux/selinux.h>
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.sp
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.BI "int selinux_file_context_cmp(const char * " a ", "
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.RS
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.BI "const char * " b ");"
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.RE
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.
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.SH "DESCRIPTION"
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.BR selinux_file_context_cmp ()
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compares two context strings excluding the user component with
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.BR strcmp (3)
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as shown in the
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.B EXAMPLE
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section.
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.sp
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This is useful as for most object contexts, the user component is not relevant.
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.
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.SH "RETURN VALUE"
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The return values follow the
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.BR strcmp (3)
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function, where:
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.RS
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0 if they are equal.
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.RE
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.RS
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1 if
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.I a
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is greater than
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.I b
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.RE
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.RS
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\-1 if
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.I a
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is less than
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.I b
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.RE
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.
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.SH "ERRORS"
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None.
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.
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.SH "NOTES"
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The contexts being compared do not specifically need to be file contexts.
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.
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.SH "EXAMPLE"
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If context
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.I a
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is:
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.RS
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user_u:user_r:user_t:s0
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.RE
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.sp
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and context
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.I b
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is:
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.RS
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root:user_r:user_t:s0
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.RE
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.sp
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then the actual strings compared are:
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.RS
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:user_r:user_t:s0 and :user_r:user_t:s0
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.RE
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.sp
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Therefore they will match and
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.BR selinux_file_context_cmp ()
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will return zero.
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.
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.SH "SEE ALSO"
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.BR selinux "(8)"
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