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FSYNC(2) BSD System Calls Manual FSYNC(2) NAME fsync -- synchronise changes to a file LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <unistd.h> int fsync(int fd); DESCRIPTION Fsync() causes all modified data and attributes of fd to be moved to a permanent storage device. This normally results in all in-core modified copies of buffers for the associated file to be written to a disk. Fsync() should be used by programs that require a file to be in a known state, for example, in building a simple transaction facility. RETURN VALUES The fsync() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS The fsync() fails if: [EBADF] fd is not a valid descriptor. [EINVAL] fd refers to a socket, not to a file. [EIO] An I/O error occurred while reading from or writing to the file system. SEE ALSO sync(2), syncer(4), sync(8) HISTORY The fsync() function call appeared in 4.2BSD. BSD June 4, 1993 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY
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