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context_new(3) — Linux manual page

context_new(3)          SELinux API documentationcontext_new(3)

NAME        top

       context_new, context_str, context_free, context_type_get,       context_type_set, context_range_get,       context_range_set,context_role_get, context_role_set,       context_user_get, context_user_set - Routines to manipulate       SELinux security contexts

SYNOPSIS        top

#include <selinux/context.h>context_t context_new(const char *context_str);const char * context_str(context_tcon);void context_free(context_tcon);const char * context_type_get(context_tcon);const char * context_range_get(context_tcon);const char * context_role_get(context_tcon);const char * context_user_get(context_tcon);int context_type_set(context_tcon, const char *type);int context_range_set(context_tcon, const char *range);int context_role_set(context_tcon, const char *role);int context_user_set(context_tcon, const char *user);

DESCRIPTION        top

       These functions allow an application to manipulate the fields of a       security context string without requiring it to know the format of       the string.context_new() returns a new context initialized to a context       string.context_str() returns a pointer to the string value of thecontext_t, valid until the next call tocontext_str() orcontext_free() for the samecontext_t*.context_free() frees the storage used by a context.context_type_get(),context_range_get(),context_role_get(),context_user_get() get a pointer to the string value of a context       component.Note:Values returned by the get functions are only valid until       the next call to a set function orcontext_free() for the samecontext_tstructure.context_type_set(),context_range_set(),context_role_set(),context_user_set() set a context component.

RETURN VALUE        top

       On failurecontext_*_set() functions return non-zero and 0 on       success.       The other functions return NULL on failure and non-NULL on       success.       On failureerrno is set appropriately.

SEE ALSO        top

selinux(8)

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.orgdwalsh@redhat.com            20 December 2011context_new(3)

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