Re: [ruby-gnome2-devel-en] [BUG] gtk blocks reading from a file (0.16.0)

[Pascal T. <pt...@li...>]

Le vendredi 05 janvier 2007 à 01:16 +0100, Pascal Terjan a écrit :
> Le jeudi 04 janvier 2007 à 19:24 +0100, Detlef Reichl a écrit :
> 
> > I've attached 3 tests, 2 for the sysfs and one for the procfs. In the
> > sysfs it hangs and with proc it runs. 
> 
> The 3 tests work fine here (i686, kernel 2.6.19.1, ruby 1.8.5, rg2
> 0.16.0)

OK, it hangs on my other machine (x86_64, kernel 2.6.17, ruby 1.8.5, rg2
0.16.0)

strace ruby -e 'File.new("/sys/class/tty/tty/dev", "r").gets' gives

open("/sys/class/tty/tty/dev", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x2ad4de2d3000
read(3, "5:0\n", 4096)                  = 4

strace ruby -rglib2 -e 'File.new("/sys/class/tty/tty/dev", "r").gets'
gives
open("/sys/class/tty/tty/dev", O_RDONLY) = 5
select(6, [3 5], [], [], NULL

So, it looks like the threading issue I used to have on /proc but it
looks line /proc/cmdline now handles correctly select.
I guess now sysfs handles select while it did not in previous kernels.