12-08-2007
Please do not double post. Thanks.
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Hi there,
I try to use:
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dir1 dir2 f1 f2 f3
Broken Pipe
>
what is broken pipe?
how can i fix it?
thks
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LEARN ABOUT SUSE
readahead
READAHEAD(2) Linux Programmer's Manual READAHEAD(2)
NAME
readahead - perform file readahead into page cache
SYNOPSIS
#define _GNU_SOURCE
#include <fcntl.h>
ssize_t readahead(int fd, off64_t offset, size_t count);
DESCRIPTION
readahead() populates the page cache with data from a file so that subsequent reads from that file will not block on disk I/O. The fd
argument is a file descriptor identifying the file which is to be read. The offset argument specifies the starting point from which data
is to be read and count specifies the number of bytes to be read. I/O is performed in whole pages, so that offset is effectively rounded
down to a page boundary and bytes are read up to the next page boundary greater than or equal to (offset+count). readahead() does not read
beyond the end of the file. readahead() blocks until the specified data has been read. The current file offset of the open file referred
to by fd is left unchanged.
RETURN VALUE
On success, readahead() returns 0; on failure, -1 is returned, with errno set to indicate the cause of the error.
ERRORS
EBADF fd is not a valid file descriptor or is not open for reading.
EINVAL fd does not refer to a file type to which readahead() can be applied.
VERSIONS
The readahead() system call appeared in Linux 2.4.13; glibc support has been provided since version 2.3.
CONFORMING TO
The readahead() system call is Linux-specific, and its use should be avoided in portable applications.
SEE ALSO
lseek(2), madvise(2), mmap(2), posix_fadvise(2), read(2)
COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2007-07-26 READAHEAD(2)