Visit The New, Modern Unix Linux Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #337
Difficulty: Easy
:set number in vi will add line numbers to the file and automatically save to disk.
True or False?
Linux & Unix Commands - Search Man Pages

fflush(3c) [sunos man page]

fflush(3C)						   Standard C Library Functions 						fflush(3C)

NAME
fflush - flush a stream SYNOPSIS
#include <stdio.h> int fflush(FILE *stream); DESCRIPTION
If stream points to an output stream or an update stream in which the most recent operation was not input, fflush() causes any unwritten data for that stream to be written to the file, and the st_ctime and st_mtime fields of the underlying file are marked for update. If stream points to an input stream or an update stream into which the most recent operation was input, that stream is flushed if it is seekable and is not already at end-of-file. Flushing an input stream discards any buffered input and adjusts the file pointer such that the next input operation accesses the byte after the last one read. A stream is seekable if the underlying file is not a pipe, FIFO, socket, or TTY device. If stream is a null pointer, fflush() performs this flushing action on all streams for which the behavior is defined above. An input stream, seekable or non-seekable, can be flushed by explicitly calling fflush() with a non-null argument specifying that stream. RETURN VALUES
Upon successful completion, fflush() returns 0. Otherwise, it returns EOF and sets errno to indicate the error. ERRORS
The fflush() function will fail if: EAGAIN The O_NONBLOCK flag is set for the file descriptor underlying stream and the process would be delayed in the write opera- tion. EBADF The file descriptor underlying stream is not valid. EFBIG An attempt was made to write a file that exceeds the maximum file size or the process's file size limit; or the file is a regular file and an attempt was made to write at or beyond the offset maximum associated with the corresponding stream. EINTR The fflush() function was interrupted by a signal. EIO The process is a member of a background process group attempting to write to its controlling terminal, TOSTOP is set, the process is neither ignoring nor blocking SIGTTOU, and the process group of the process is orphaned. ENOSPC There was no free space remaining on the device containing the file. EPIPE An attempt is made to write to a pipe or FIFO that is not open for reading by any process. A SIGPIPE signal will also be sent to the calling process. The fflush() function may fail if: ENXIO A request was made of a non-existent device, or the request was beyond the limits of the device. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
getrlimit(2), ulimit(2), attributes(5), standards(5) SunOS 5.10 1 Nov 2003 fflush(3C)

Check Out this Related Man Page

fclose(3S)																fclose(3S)

NAME
fclose(), fflush(), fclose_unlocked(), fflush_unlocked() - close or flush a stream SYNOPSIS
Obsolescent Interfaces DESCRIPTION
causes any buffered data for the named stream to be written out, and the stream to be closed. Buffers allocated by the standard input/out- put system may be freed. is performed automatically for all open files upon calling exit(2). If stream points to an output stream or an update stream in which the most recent operation was output, causes any buffered data for the stream to be written to that file; otherwise any buffered data is discarded. The stream remains open. If stream is a null pointer, performs this flushing action on all currently open streams. Obsolescent Interfaces and close or flush a stream. RETURN VALUE
Upon successful completion, and return 0. Otherwise, they return EOF and set to indicate the error. ERRORS
If or fails, is set to one of: The flag is set for the file descriptor underlying stream and the process would be delayed in the write operation. The file descriptor underlying stream is not valid. An attempt was made to write a file that exceeds the process's file size limit or the maximum file size (see ulimit(2)). or was interrupted by a signal. The process is in a background process group and is attempting to write to its controlling terminal, is set, the process is neither ignoring nor blocking the signal, and the process group of the process is orphaned. There was no free space remaining on the device containing the file. An attempt was made to write to a pipe that is not open for reading by any process. A signal is also sent to the process. Additional values may be set by the underlying and functions (see write(2), lseek(2) and close(2)). WARNINGS
and are obsolescent interfaces supported only for compatibility with existing DCE applications. New multithreaded applications should use and SEE ALSO
close(2), exit(2), lseek(2), write(2), flockfile(3S), fopen(3S), setbuf(3S), thread_safety(5). STANDARDS CONFORMANCE
fclose(3S)

Featured Tech Videos