selinux_file_context_cmp(3)

1selinux_file_context_cmp(3)Library Functions Manualselinux_file_context_cmp(3)
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NAME

6       selinux_file_context_cmp   -  Compare  two  SELinux  security  contexts
7       excluding the 'user' component
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SYNOPSIS

10       #include <selinux/selinux.h>
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12       int selinux_file_context_cmp(const char *a,
13              const char *b);
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DESCRIPTION

16       selinux_file_context_cmp() compares two context strings  excluding  the
17       user component with strcmp(3) as shown in the EXAMPLE section.
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19       This  is  useful as for most object contexts, the user component is not
20       relevant.
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RETURN VALUE

23       The return values follow the strcmp(3) function, where:
24              0  if they are equal.
25              1  if a is greater than b
26              -1 if a is less than b
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ERRORS

29       None.
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NOTES

32       The contexts being compared do not specifically need to  be  file  con‐
33       texts.
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EXAMPLE

36       If context a is:
37              user_u:user_r:user_t:s0
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39       and context b is:
40              root:user_r:user_t:s0
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42       then the actual strings compared are:
43              :user_r:user_t:s0 and :user_r:user_t:s0
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45       Therefore  they  will  match and selinux_file_context_cmp() will return
46       zero.
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