Jilles Tjoelker <jil...@stack.nl> wrote: > On Wed, Oct 27, 2010 at 03:33:41PM -0600, Eric Blake wrote: >> Dash does not behave well when under artificial fd pressure due to >> ulimit -n. It insists on copying a to-be-closed fd to another fd >> greater than 10, then complains when the dup fails, rather than just >> flat-out closing the fd in the first place. Compare this with ksh93 > >> $ ksh -c 'ulimit -n 10; : <&-'; echo $? >> 0 >> $ dash -c 'ulimit -n 11; : <&-'; echo $? >> 0 >> $ dash -c 'ulimit -n 10; : <&-'; echo $? >> dash: 0: Invalid argument >> 2 > >> See this thread on the bug-tar list for more details: >> http://thread.gmane.org/gmane.comp.gnu.tar.bugs/4010/focus=4020 > > Summary: use 'exec' to close the file descriptors before setting ulimit > -n ridiculously low instead of relying on redirections to work in such a > restricted environment.
Thanks for the excellent analysis Jilles! I agree with you on all counts :) -- Email: Herbert Xu <herb...@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe dash" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
