So 2.6.33+ has a possible bug, the nice thing it is nothing what i maintain here :)
thx ________________________________________ Von: busybox <[email protected]> im Auftrag von Grant Edwards <[email protected]> Gesendet: Mittwoch, 20. Januar 2021 17:15:38 An: [email protected] Betreff: Re: AW: Why doesn't "cat a b > foo" work? On 2021-01-20, Walter Harms <[email protected]> wrote: > can you give a hint what kernel version is problematic? NB: prior to 2.6.33, sendfile() could only be used with a socket as the destination. I'm seeing the failure with 2.6.33.7 In 2.6.33.7, when used with a normal file as the output, it always writes the data to offset 0 in the file. That's fine if you only call it once and then close the output fd. However, if you call it multiple times (as busybox 'cat' does when copying multiple files), then you don't get the expected result. The contents of the input files are not concatenated. Instead the contents of each input file overwites the existing contents of the output file starting at offset 0. I do not know when that was fixed in the Linux kernel. -- Grant _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
