SYS$DEQ (OpenVMS) SYS$DEQ (OpenVMS)
NAME
fcntl - control open file descriptors
SYS$DEQ - Dequeue lock request
EXPLAINATION
The Digital UNIX fcntl system call provides functionality similar to
the OpenVMS SYS$DEQ system service in that it allows the calling func‐
tion to unlock a portion of a file. The calling program can unlock a
portion of a file by calling the fcntl system call with F_SETLK as the
command (second) parameter and the l_type field of the flock structure
set to F_UNLCK. No callback (or AST) is associated with F_SETLK. The
lockf function is a front end to the fcntl system call.
RELATED INFORMATION
Digital UNIX Functions:
fnctl(2), open(2), lockf(3), semget(2) delim off
SYS$DEQ (OpenVMS)
