The File Descriptor Management services are supplied by the logical file system for creating, using, and maintaining file descriptors. These services allow for the implementation of system calls that use a file descriptor as a parameter, create a file descriptor, or return file descriptors to calling applications. The following are the File Descriptor Management services:
ufdcreate | Allocates and initializes a file descriptor. |
ufdhold | Increments the reference count on a file descriptor. |
ufdrele | Decrements the reference count on a file descriptor. |
ufdgetf | Gets a file structure pointer from a held file descriptor. |
getufdflags | Gets the flags from a file descriptor. |
setufdflags | Sets flags in a file descriptor. |
"Understanding File Descriptors" in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.