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On 19/10/2006, at 12:09 PM, Penedo wrote:
On 19/10/06, Matthew Hannigan <[EMAIL PROTECTED]> wrote:
...
> egrep ..... >> $TMP
This is sorta off topic, but setting umask is not enough.
Someone else could have a file of the same name as $TMP
Indeed, or a symbolic link under the same name, or a pipe, or ....
Normally I do a sanity check first:
if [ -e $TMP ]; then
rm -f $TMP
else
touch $TMP
fi
Or something similar.
What I tend to do is make a directory and put files in
there. You're guaranteed that mkdir will return error
if it exists already.
True - good idea :)
And/or just use the shell's pid in the temporary file name, e.g.
TMP=/tmp/mail-address.tmp.$$
There is also mktemp(1) for this, so maybe:
TMP=`mktemp /tmp/mail-addresses.XXXXXXXXXX`
Never used mktemp... I'll have to have a look at it.
Cheers,
James
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