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The offset into the file (off_t) only refers to the position in the file. It says nothing about the data at that position, nor its size.<br />
<br />
You can write whatever data you want (of whatever size you want) at the given offset, and sizeof(off_t) has no play in that.<br />
<br />
The only thing that is relevant to you about sizeof(off_t), is that it tells you the maximum offset you can use for a file.
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The offset into the file (off_t) only refers to the position in the file. It says nothing about the data at that position, nor its size.

You can write whatever data you want (of whatever size you want) at the given offset, and sizeof(off_t) has no play in that.

The only thing that is relevant to you about sizeof(off_t), is that it tells you the maximum offset you can use for a file.

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Hi,<br />
<br />
if i use off_t on 64 bit machine and enable the LFS, do i need to change the fwrite to sizeof(off_t)<br />
<br />
fwrite(&amp;value, sizeof(unsigned int),1,fp);<br />
<br />
thanks..
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Hi,

if i use off_t on 64 bit machine and enable the LFS, do i need to change the fwrite to sizeof(off_t)

fwrite(&value, sizeof(unsigned int),1,fp);

thanks..

64bit for fwrite ...

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.