On 02/23/2011 11:58 AM, Bjartur Thorlacius wrote: > % echo | head -n2 && echo bug > bug > > This bit me when writing a line oriented prompter (which would `while > head -n1`). > > FYI, this also applies to FreeBSD head.
That's because this is not a bug, but a POSIX requirement: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/head.html "When a file contains less than number lines, it shall be copied to standard output in its entirety. This shall not be an error." -- Eric Blake [email protected] +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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