Is your feature request related to a problem? Please describe.
The unit tests and API documentation should match, where all status codes in the API documentation are tested in a unit test, and likewise all codes being tested for are documented in the API.

Describe the solution you'd like
Resolve the following mismatches:

File src/os/inc/osapi-filesys.h, function OS_FileSysAddFixedMap():

• ONLY IN DOXY: OS_ERR_NAME_TOO_LONG
• ONLY IN DOXY: OS_FS_ERR_PATH_TOO_LONG
• ONLY IN DOXY: OS_INVALID_POINTER

File src/os/inc/osapi-filesys.h, function OS_mkfs():

• OK: OS_FS_ERR_DEVICE_NOT_FREE
• ONLY IN DOXY: OS_FS_ERR_DRIVE_NOT_CREATED
• ONLY IN TEST: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_mount():

• OK: OS_ERR_NAME_NOT_FOUND
• ONLY IN DOXY: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• ONLY IN TEST: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_initfs():

• OK: OS_FS_ERR_DEVICE_NOT_FREE
• ONLY IN DOXY: OS_FS_ERR_DRIVE_NOT_CREATED
• OK: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_rmfs():

• ONLY IN DOXY: OS_ERROR
• OK: OS_ERR_NAME_NOT_FOUND
• ONLY IN DOXY: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• ONLY IN DOXY: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_unmount():

• ONLY IN DOXY: OS_ERROR
• OK: OS_ERR_NAME_NOT_FOUND
• OK: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_FileSysStatVolume():

• ONLY IN DOXY: OS_ERROR
• OK: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_chkfs():

• ONLY IN DOXY: OS_ERROR
• ONLY IN DOXY: OS_ERR_NOT_IMPLEMENTED
• OK: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• ONLY IN DOXY: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_FS_GetPhysDriveName():

• ONLY IN DOXY: OS_ERROR
• OK: OS_ERR_NAME_NOT_FOUND
• OK: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_TranslatePath():

• ONLY IN DOXY: OS_FS_ERR_NAME_TOO_LONG
• OK: OS_FS_ERR_PATH_INVALID
• OK: OS_FS_ERR_PATH_TOO_LONG
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-filesys.h, function OS_GetFsInfo():

• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

Additional context
Originally noted in #331, split into separate work items.

Requester Info
Joseph Hickey, Vantage Systems, Inc.