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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_stream_rights ,
37 .Nm caph_cache_tzdata ,
38 .Nm caph_cache_catpages ,
40 .Nm caph_enter_casper ,
41 .Nm caph_rights_limit ,
42 .Nm caph_ioctls_limit ,
44 .Nd "set of the capsicum helpers, part of the libcapsicum"
48 .In capsicum_helpers.h
52 .Fn caph_enter_casper "void"
54 .Fn caph_rights_limit "int fd" "const cap_rights_t *rights"
56 .Fn caph_ioctls_limit "int fd" "const unsigned long *cmds" "size_t ncmds"
58 .Fn caph_fcntls_limit "int fd" "uint32_t fcntlrights"
60 .Fn caph_limit_stream "int fd" "int flags"
62 .Fn caph_limit_stdin "void"
64 .Fn caph_limit_stderr "void"
66 .Fn caph_limit_stdout "void"
68 .Fn caph_limit_stdio "void"
70 .Fn caph_stream_rights "cap_rights_t *" "int flags"
72 .Fn caph_cache_tzdata "void"
74 .Fn caph_cache_catpages "void"
78 .Nm caph_rights_limit ,
82 are respectively equivalent to
84 .Xr cap_rights_limit 2 ,
85 .Xr cap_ioctls_limit 2
87 .Xr cap_fcntls_limit 2 ,
88 it returns success when the kernel is built without support of the capability
95 it returns success when the system is built without Casper support.
99 are a set of a inline functions which simplify modifying programs to use
101 The goal is to reduce duplicated code patterns.
106 but there is no need to link to the library.
108 .Fn caph_limit_stream
109 restricts capabilities on
111 to only those needed by POSIX stream objects (that is, FILEs).
113 These flags can be provided:
115 .Bl -tag -width "CAPH_IGNORE_EBADF" -compact -offset indent
116 .It Dv CAPH_IGNORE_EBADF
117 Do not return an error if file descriptor is invalid.
119 Set CAP_READ on limited descriptor.
121 Set CAP_WRITE on limited descriptor.
124 .Fn caph_limit_stdin ,
125 .Fn caph_limit_stderr
127 .Fn caph_limit_stdout
128 limit standard descriptors using the
129 .Nm caph_limit_stream
133 limits stdin, stderr and stdout.
135 .Nm caph_stream_rights
136 may be used to initialize
138 with the same rights that a stream would be limited to, as if
139 .Fn caph_limit_stream
140 had been invoked using the same
143 .Fn caph_cache_tzdata
144 precaches all timezone data needed to use
146 local time functions.
148 .Fn caph_cache_catpages
149 caches Native Language Support (NLS) data.
150 NLS data is used for localized error printing by
158 .Xr cap_rights_limit 2 ,