Section: Linux Programmer's Manual (2)
_llseek - reposition read/write file offset
int _llseek(unsigned int fd, unsigned long offset_high,
unsigned long offset_low, loff_t *result,
unsigned int whence);
There is no glibc wrapper for this system call; see NOTES.
Note: for information about the
library function, see
system call repositions the offset of the open file description associated
with the file descriptor
to the value
(offset_high << 32) | offset_low
This new offset is a byte offset
relative to the beginning of the file, the current file offset,
or the end of the file, depending on whether
The new file offset is returned in the argument
is a 64-bit signed type.
This system call exists on various 32-bit platforms to support
seeking to large file offsets.
Upon successful completion,
Otherwise, a value of -1 is returned and
is set to indicate the error.
is not an open file descriptor.
Problem with copying results to user space.
This function is Linux-specific, and should not be used in programs
intended to be portable.
Glibc does not provide a wrapper for this system call.
To invoke it directly, use
However, you probably want to use the
wrapper function instead.
This page is part of release 5.10 of the Linux
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