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72 lines
1.8 KiB
Groff
72 lines
1.8 KiB
Groff
.\" Hey Emacs! This file is -*- nroff -*- source.
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.\"
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.\" Author: Eamon Walsh (ewalsh@tycho.nsa.gov) 2004
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.TH "avc_context_to_sid" "3" "27 May 2004" "" "SELinux API documentation"
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.SH "NAME"
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avc_context_to_sid, avc_sid_to_context, avc_get_initial_sid \- obtain and manipulate SELinux security ID's.
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.SH "SYNOPSIS"
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.B #include <selinux/selinux.h>
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.B #include <selinux/avc.h>
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.sp
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.BI "int avc_context_to_sid(security_context_t " ctx ", security_id_t *" sid ");"
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.sp
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.BI "int avc_sid_to_context(security_id_t " sid ", security_context_t *" ctx ");"
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.sp
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.BI "int avc_get_initial_sid(const char *" name ", security_id_t *" sid ");"
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.sp
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.SH "DESCRIPTION"
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Security ID's (SID's) are opaque representations of security contexts, managed by the userspace AVC.
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.B avc_context_to_sid
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returns a SID for the given
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.I context
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in the memory referenced by
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.IR sid .
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.B avc_sid_to_context
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returns a copy of the context represented by
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.I sid
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in the memory referenced by
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.IR ctx .
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The user must free the copy with
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.BR freecon (3).
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.B avc_get_initial_sid
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returns a SID for the kernel initial security identifier specified by
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.IR name .
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.SH "RETURN VALUE"
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.B avc_context_to_sid
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and
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.B avc_sid_to_context
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return zero on success. On error, \-1 is returned and
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.I errno
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is set appropriately.
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.SH "ERRORS"
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.TP
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.B ENOMEM
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An attempt to allocate memory failed.
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.SH "NOTES"
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As of libselinux version 2.0.86, SID's are no longer reference counted. A SID will be valid from the time it is first obtained until the next call to
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.BR avc_destroy (3).
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The
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.B sidget
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and
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.B sidput
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functions, formerly used to adjust the reference count, are no-ops and are deprecated.
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.SH "AUTHOR"
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Eamon Walsh <ewalsh@tycho.nsa.gov>
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.SH "SEE ALSO"
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.BR avc_init (3),
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.BR avc_has_perm (3),
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.BR avc_cache_stats (3),
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.BR avc_add_callback (3),
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.BR getcon (3),
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.BR freecon (3)
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.BR selinux (8)
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