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28 .Dt CAPSICUM_HELPERS 3
31 .Nm caph_limit_stream ,
32 .Nm caph_limit_stdin ,
33 .Nm caph_limit_stderr ,
34 .Nm caph_limit_stdout ,
35 .Nm caph_limit_stdio ,
36 .Nm caph_cache_tzdata ,
37 .Nm caph_cache_catpages ,
39 .Nm caph_enter_casper ,
40 .Nm caph_rights_limit ,
41 .Nm caph_ioctls_limit ,
43 .Nd "set of the capsicum helpers, part of the libcapsicum"
47 .In capsicum_helpers.h
51 .Fn caph_enter_casper "void"
53 .Fn caph_rights_limit "inf fd" "const cap_righst_t *rights"
55 .Fn caph_ioctls_limit "inf fd" "const unsigned long *cmds" "size_t ncmds"
57 .Fn caph_fcntls_limit "inf fd" "uint32_t fcntlrights"
59 .Fn caph_limit_stdin "void"
61 .Fn caph_limit_stderr "void"
63 .Fn caph_limit_stdout "void"
65 .Fn caph_limit_stdio "void"
67 .Fn caph_cache_tzdata "void"
69 .Fn caph_cache_catpages "void"
73 .Nm caph_rights_limit ,
77 are respectively equivalent to
79 .Xr cap_rights_limit 2 ,
80 .Xr cap_ioctls_limit 2
82 .Xr cap_fcntls_limit 2 ,
83 it returns success when the kernel is built without support of the capability
90 it returns success when the system is built without Casper support.
94 are a set of a inline functions which simplify modifying programs to use
96 The goal is to reduce duplicated code patterns.
101 but there is no need to link to the library.
103 .Fn caph_limit_stream
104 restricts capabilities on
106 to only those needed by POSIX stream objects (that is, FILEs).
108 These flags can be provided:
110 .Bl -tag -width "CAPH_IGNORE_EBADF" -compact -offset indent
111 .It Dv CAPH_IGNORE_EBADF
112 Do not return an error if file descriptor is invalid.
114 Set CAP_READ on limited descriptor.
116 Set CAP_WRITE on limited descriptor.
119 .Fn caph_limit_stdin ,
120 .Fn caph_limit_stderr
122 .Fn caph_limit_stdout
123 limit standard descriptors using the
124 .Nm caph_limit_stream
128 limits stdin, stderr and stdout.
130 .Fn caph_cache_tzdata
131 precaches all timezone data needed to use
133 local time functions.
135 .Fn caph_cache_catpages
136 caches Native Language Support (NLS) data.
137 NLS data is used for localized error printing by
145 .Xr cap_rights_limit 2 ,