On Mon, Feb 3, 2014 at 2:22 PM, Greg Wooledge <wool...@eeg.ccf.org> wrote:
> On Sat, Feb 01, 2014 at 05:36:17PM +0100, Mathieu Malaterre wrote:
>> #!/bin/bash
>>
>> for i in {0..4294967295}; do
>> echo $i
>> done
>
> Others said not to do that. They are correct, but they didn't tell you
> what to do instead.
>
> for ((i=0; i<=4294967295; i++)); do
> echo $i
> done
>
> The brace expansion form actually expands to the full list of strings,
> all at once, which means they are all stored in memory at once. Most
> computers don't have that much memory (something like 40 GB to hold
> your 4 billion strings, of variable length from 2 to 11 bytes each).
> The C-style for loop doesn't generate them all at once, so it only uses
> a few bytes of memory.
Thanks ! Problem solved.
I still believe the SIGSEGV should be handled in a more graceful way,
at least on a Linux kernel.
--
Mathieu
