NAME

aa_splitcon - split the confinement context into a label and mode

SYNOPSIS

#include <sys/apparmor.h>

char *aa_splitcon(char *con, char **mode);

Link with -lapparmor when compiling.

DESCRIPTION

The aa_splitcon() function splits a confinement context into separate label and mode strings. The @con string is modified so that the label portion is NUL terminated. The enforcement mode is also NUL terminated and the parenthesis surrounding the mode are removed. If @mode is non-NULL, it will point to the first character in the enforcement mode string on success.

The Linux kernel's /proc/<PID>/attr/current interface appends a trailing newline character to AppArmor contexts that are read from that file. If @con contains a single trailing newline character, it will be stripped by aa_splitcon() prior to all other processing.

RETURN VALUE

Returns a pointer to the first character in the label string. NULL is returned on error.

EXAMPLE

 Context                        Label               Mode 
 -----------------------------  ------------------  -------
 unconfined                     unconfined          NULL
 unconfined\n                   unconfined          NULL
 /bin/ping (enforce)            /bin/ping           enforce
 /bin/ping (enforce)\n          /bin/ping           enforce
 /usr/sbin/rsyslogd (complain)  /usr/sbin/rsyslogd  complain

BUGS

None known. If you find any, please report them at <https://gitlab.com/apparmor/apparmor/-/issues>.