SYS$UPDSEC (OpenVMS) SYS$UPDSEC (OpenVMS)
NAME
msync - synchronize a mapped file
fsync - write changes in a file to permanent storage
sync - updates all file systems
SYS$UPDSEC - Flush modified virtual address space back to mapped file
EXPLAINATION
The Digital UNIX msync, fsync, and sync system calls provide function‐
ality similar to the OpenVMS SYS$UPDSEC system service. The sync call
is an asynchronous system call, the data and metadata for the entire
file system writes are scheduled and the call returns. The msync sys‐
tem call writes out a memory mapped file along a region specified in
the system call. The fsync system call writes out data associated with
an open file.
RELATED INFORMATION
Digital UNIX Functions:
msync(2), fsync(2), sync(2), sync(8) delim off
SYS$UPDSEC (OpenVMS)
