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Include cstring.i and some cstring output typemaps for libapparmor SWIG

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This includes a custom typemap to handle (char **label, char **mode)
pairs and a cstring_output_allocate declaration for char **mnt.

Signed-off-by: Ryan Lee <ryan.lee@canonical.com>
This commit is contained in:
Ryan Lee 2024-09-12 12:35:23 -07:00
parent f7b5d0e783
commit 50d26beb00
1 changed files with 28 additions and 0 deletions
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28
libraries/libapparmor/swig/SWIG/libapparmor.i
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@ -8,6 +8,7 @@
%}
%include "typemaps.i"
%include <cstring.i>
%newobject parse_record;
%delobject free_record;
@ -79,6 +80,31 @@ warnings.warn("free_record is now a no-op as the record's memory is handled auto
/* apparmor.h */
/*
* label is a heap-allocated pointer, but when label and mode occur together,
* the freeing of label must be deferred because mode points into label.
*
* %cstring_output_allocate((char **label, char **mode), free(*$1))
* does not handle multi-argument typemaps correctly, so we write our own
* typemap based on it instead.
*/
%typemap(in,noblock=1,numinputs=0) (char **label, char **mode) ($*1_ltype temp_label = 0, $*2_ltype temp_mode = 0) {
$1 = &temp_label;
$2 = &temp_mode;
}
%typemap(freearg,match="in") (char **label, char **mode) ""
%typemap(argout,noblock=1,fragment="SWIG_FromCharPtr") (char **label, char **mode) {
%append_output(SWIG_FromCharPtr(*$1));
%append_output(SWIG_FromCharPtr(*$2));
free(*$1);
}
/*
* mode is also an out pointer, but it points into an existing buffer.
* This is a catch-all for occurrences of **mode that aren't paired with **label.
*/
%cstring_output_allocate(char **mode, );
extern char *aa_splitcon(char *con, char **mode);
#ifdef SWIGPYTHON
@ -97,6 +123,8 @@ extern char *aa_splitcon(char *con, char **mode);
/* apparmor.h */
extern int aa_is_enabled(void);
/* aa_find_mountpoint mnt is an output pointer to a heap-allocated string */
%cstring_output_allocate(char **mnt, free(*$1));
extern int aa_find_mountpoint(char **mnt);
extern int aa_change_hat(const char *subprofile, unsigned long magic_token);
extern int aa_change_profile(const char *profile);