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security_class_to_string(3) — Linux manual page

security...o_string(3)  SELinux API documentationsecurity...o_string(3)

NAME        top

       security_class_to_string, security_av_perm_to_string,       string_to_security_class, string_to_av_perm, security_av_string,       mode_to_security_class - convert between SELinux class and       permission values and string names.  print_access_vector - display       an access vector in human-readable form.

SYNOPSIS        top

#include <selinux/selinux.h>const char *security_class_to_string(security_class_ttclass);const char *security_av_perm_to_string(security_class_ttclass,access_vector_tav);int security_av_string(security_class_ttclass, access_vector_tav, char **result);security_class_t string_to_security_class(const char *name);security_class_t mode_to_security_class(mode_tmode);access_vector_t string_to_av_perm(security_class_ttclass, constchar *name);void print_access_vector(security_class_ttclass, access_vector_tav);

DESCRIPTION        top

security_class_to_string() returns a string name for classtclass,       or NULL if the class is invalid.  The returned string must not be       modified or freed.security_av_perm_to_string() returns a string name for the access       vector bitav of classtclass, or NULL if either argument is       invalid.  The returned string must not be modified or freed.security_av_string() computes a full access vector string       representation usingtclass andav, which may have multiple bits       set.  The string is returned in the memory pointed to byresult,       and should be freed by the caller usingfree(3).string_to_security_class() returns the class value corresponding       to the string namename, or zero if no such class exists.mode_to_security_class() returns the class value corresponding to       the specifiedmode, or zero if no such class exists.string_to_av_perm() returns the access vector bit corresponding to       the string namename and security classtclass, or zero if no such       value exists.print_access_vector() displays an access vector in human-readable       form on the standard output stream.

RETURN VALUE        top

security_av_string() returns zero on success or -1 on error witherrno set appropriately.print_access_vector() does not return a       value. All other functions return zero or NULL on error.

ERRORS        top

EINVALA class or access vector argument is not recognized by the              currently loaded policy.ENOMEMAn attempt to allocate memory failed.

AUTHOR        top

       Eamon Walsh <ewalsh@tycho.nsa.gov>

SEE ALSO        top

selinux(8),getcon(3),getfilecon(3)stat(3)

COLOPHON        top

       This page is part of theselinux (Security-Enhanced Linux user-       space libraries and tools) project.  Information about the project       can be found at ⟨https://github.com/SELinuxProject/selinux/wiki⟩.       If you have a bug report for this manual page, see       ⟨https://github.com/SELinuxProject/selinux/wiki/Contributing⟩.       This page was obtained from the project's upstream Git repository       ⟨https://github.com/SELinuxProject/selinux⟩ on 2025-08-11.  (At       that time, the date of the most recent commit that was found in       the repository was 2025-08-04.)  If you discover any rendering       problems in this HTML version of the page, or you believe there is       a better or more up-to-date source for the page, or you have       corrections or improvements to the information in this COLOPHON       (which isnot part of the original manual page), send a mail to       man-pages@man7.org                               30 Mar 2007security...o_string(3)

Pages that refer to this page:avc_has_perm(3), security_compute_av(3)

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