Similar to 233760 and 236717, export some more useful info about the

kernel-based POSIX semaphore descriptors to userland via procstat(1) and
fstat(1):
- Change sem file descriptors to track the pathname they are associated
  with and add a ksem_info() method to copy the path out to a
  caller-supplied buffer.
- Use the fo_stat() method of shared memory objects and ksem_info() to
  export the path, mode, and value of a semaphore via struct kinfo_file.
- Add a struct semstat to the libprocstat(3) interface along with a
  procstat_get_sem_info() to export the mode and value of a semaphore.
- Teach fstat about semaphores and to display their path, mode, and value.

MFC after:	2 weeks

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/sys/user.h b/sys/sys/user.h
index 2f6514b..aa81dc9 100644
--- a/sys/sys/user.h
+++ b/sys/sys/user.h
@@ -365,6 +365,10 @@ struct kinfo_file {
 			uint32_t	kf_file_pad1;
 		} kf_file;
 		struct {
+			uint32_t	kf_sem_value;
+			uint16_t	kf_sem_mode;
+		} kf_sem;
+		struct {
 			uint64_t	kf_pipe_addr;
 			uint64_t	kf_pipe_peer;
 			uint32_t	kf_pipe_buffer_cnt;