Syscalls concerned with modifying/deleting the extended attributes of a file

[aniketp]

Summary

This revision introduces test-cases for checking the proper auditability of syscalls
concerned with modifying/deleting the extended attributes of a file or a symbolic link.
The system calls are categorized within file-attribute-modify audit class.
List of syscalls are:

• extattr_set_file(2)
• extattr_set_fd(2)
• extattr_set_link(2)
• extattr_delete_file(2)
• extattr_delete_fd(2)
• extattr_delete_link(2)

Test Plan

Execute make && make install from test/sys/audit.
Execute kyua test from /usr/tests/sys/audit. All testcases should succeed.

[asomers]

tests/sys/audit/file-attribute-modify.c

42 ↗

(On Diff #43956)

It's confusing to name this variable readbuff, because it isn't a buffer. Could you please pick a different name?

[aniketp]

Replace readbuff with retval since it is a simple return value instead of a buffer
i.e return value of extattr_delete_{file/fd/link}