[LTP] [PATCH v3 1/4] syscalls/setxattr01: new testcase to test setxattr(2) basic function

[Eryu G. <eg...@re...>]

Basic tests for setxattr(2) and make sure setxattr(2) handles error
conditions correctly.

There are 7 test cases:
1. Any other flags being set except XATTR_CREATE and XATTR_REPLACE,
   setxattr(2) should return -1 and set errno to EINVAL
2. With XATTR_REPLACE flag set but the attribute does not exist,
   setxattr(2) should return -1 and set errno to ENOATTR
3. Create new attr with name length greater than XATTR_NAME_MAX(255)
   setxattr(2) should return -1 and set errno to ERANGE
4. Create new attr whose value length is greater than XATTR_SIZE_MAX(65536)
   setxattr(2) should return -1 and set errno to E2BIG
5. Create new attr whose value length is zero,
   setxattr(2) should succeed
6. Replace the attr value without XATTR_REPLACE flag being set,
   setxattr(2) should return -1 and set errno to EEXIST
7. Replace attr value with XATTR_REPLACE flag being set,
   setxattr(2) should succeed

Signed-off-by: Eryu Guan <eg...@re...>
---
 runtest/syscalls                                |    2 +
 testcases/kernel/syscalls/setxattr/Makefile     |   23 +++
 testcases/kernel/syscalls/setxattr/setxattr01.c |  223 +++++++++++++++++++++++
 3 files changed, 248 insertions(+), 0 deletions(-)
 create mode 100644 testcases/kernel/syscalls/setxattr/Makefile
 create mode 100644 testcases/kernel/syscalls/setxattr/setxattr01.c