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RE: Shell script loop runs out of memory
AZ 9901 wrote on 2012-05-31:
> 2012/5/31 Jordan :
> Then, when (bash) scripting under Cygwin, you must take care to avoid
> forking as much as possible.
> You could try to improve the "sleep 1" loop with the following one :
> while md5sum $FILE_TO_CHECK | cut -d " " -f1 | grep -q "^$MD5PRINT$"
> sleep 1
> Note that MD5PRINTNEW is no more useful here.
> With this loop we avoid the fork done by
> MD5PRINTNEW=`md5sum $FILE_TO_CHECK | cut -d " " -f1`
Doesn't that just replace the 2 MD5PRINTNEW forks (md5sum and cut) with 3 (md5sum, cut, and grep)?
Seems like the (untested) following would be better (in terms of fewer forks):
md5sum $FILE_TO_CHECK > "$TMPFILE"
while md5sum -c "$TMPFILE"
Principal Software Engineer