Re: OT: why no file copy() libc/syscall ??

[Ihar 'Philips' Filipau]

  sendfile(2) - ?

Davide Rossetti wrote:
> it may be orribly RTFM... but writing a simple framework I realized 
> there is no libc/POSIX/whoknows
> copy(const char* dest_file_name, const char* src_file_name)
>
> What is the technical reason???
>
> I understand that there may be little space for kernel side 
> optimizations in this area but anyway I'm surprised I have to write
>
> < the bits to clone the metadata of src_file_name on opening 
> dest_file_name >
> const int BUFSIZE = 1<<12;
> char buffer[BUFSIZE];
> int nrb;
> while((nrb = read(infd, buffer, BUFSIZE) != -1) {
>  ret = write(outfd, buffer, nrb);
>  if(ret != nrb) {...}
> }
>
> instead of something similar to:
> sys_fscopy(...)
>
> regards


--
Ihar 'Philips' Filipau  / with best regards from Saarbruecken.
--                                                           _ _ _
 "... and for $64000 question, could you get yourself       |_|*|_|
   vaguely familiar with the notion of on-topic posting?"   |_|_|*|
                                -- Al Viro @ LKML           |*|*|*|

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