[LTP] [PATCH v3 3/4] syscalls/setxattr02: new testcase to test setxattr(2)

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

In the user.* namespace, only regular files and directories can
have extended attributes. Otherwise setxattr(2) should return -1
and set errno to EPERM.

There are 7 test cases:
1. Set attribute to a regular file, setxattr(2) should succeed
2. Set attribute to a directory, setxattr(2) should succeed
3. Set attribute to a symlink which points to the regular file,
   setxattr(2) should return -1 and set errno to EEXIST
4. Set attribute to a FIFO, setxattr(2) should return -1 and set
   errno to EPERM
5. Set attribute to a char special file, setxattr(2) should
   return -1 and set errno to EPERM
6. Set attribute to a block special file, setxattr(2) should
   return -1 and set errno to EPERM
7. Set attribute to a UNIX domain socket, setxattr(2) should
   return -1 and set errno to EPERM

Signed-off-by: Eryu Guan <eg...@re...>
---
 runtest/syscalls                                |    1 +
 testcases/kernel/syscalls/setxattr/setxattr02.c |  235 +++++++++++++++++++++++
 2 files changed, 236 insertions(+), 0 deletions(-)
 create mode 100644 testcases/kernel/syscalls/setxattr/setxattr02.c