Standard C Library Functions                        fdatasync(3C)



NAME
     fdatasync - synchronize a file's data

SYNOPSIS
     #include 

     int fdatasync(int fildes);


DESCRIPTION
     The fdatasync() function forces  all  currently  queued  I/O
     operations  associated  with  the  file  indicated  by  file
     descriptor fildes to the synchronized I/O completion state.


     The functionality is as described for  fsync(3C)  (with  the
     symbol XOPENREALTIME defined), with the exception that all
     I/O operations are completed as defined for synchronised I/O
     data integrity completion.

RETURN VALUES
     If successful, the fdatasync() function  returns  0.  Other-
     wise, the function returns -1 and sets errno to indicate the
     error. If the fdatasync() function  fails,  outstanding  I/O
     operations are not guaranteed to have been completed.

ERORS
     The  fdatasync() function will fail if:

     EBADF     The fildes argument is not a valid file descriptor
               open for writing.


     EINVAL    The system does not support synchronized  I/O  for
               this file.


     ENOSYS    The function fdatasync() is not supported  by  the
               system.



     In the event that any of the  queued  I/O  operations  fail,
     fdatasync() returns the error conditions defined for read(2)
     and write(2).

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:






SunOS 5.11           Last change: 5 Feb 2008                    1






Standard C Library Functions                        fdatasync(3C)



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Committed                   
    
     MT-Level                     Async-Signal-Safe           
    
     Standard                     See standards(5).           
    


SEE ALSO
     fcntl(2),    open(2),    read(2),    write(2),    fsync(3C),
     aiofsync(3C), fcntl.h(3HEAD), attributes(5), standards(5)









































SunOS 5.11           Last change: 5 Feb 2008                    2