On 7-6-2013 5:13, Miles Bader wrote:
Gary V. Vaughan g...@gnu.org writes:
On 7 Jun 2013, at 08:41, Miles Bader mi...@gnu.org wrote:
Wait, why can't you use test $x -gt 0...?
You mean test 0 -lt $x, otherwise if x starts with a hyphen (e.g -1)
things will go awry!
I dunno, test here (both
A.P. Horst arieho...@xs4all.nl writes:
I ended up using this:
if ! test $var -gt 0 /dev/null 21; then
Incidentally, test should never produce any output on stdout, so you
can just use 2/dev/null instead of /dev/null 21... :]
-miles
--
P.S. All information contained in the above letter is
On Fri, 7 Jun 2013, A.P. Horst wrote:
Thanks for all the great input! Seems google isn't always your best friend, at
least not when it comes to autoconf. The solution with the test command is
very elegant and readable.
I ended up using this:
if ! test $var -gt 0 /dev/null 21; then
not
On Thu, Jun 6, 2013 at 8:11 AM, Eric Blake ebl...@redhat.com wrote:
- Original Message -
A more robust, (and more portable), formulation may be:
echo $var | grep '^+\{0,1\}[0-9]\{1,\}$' /dev/null 21
Why fork, when straight shell will do?
yea, forking for grep is probably going
Tim Rice t...@multitalents.net writes:
On Fri, 7 Jun 2013, A.P. Horst wrote:
if ! test $var -gt 0 /dev/null 21; then
if ! test ... is definitely not portable.
Hmmm, I can never remember which is the portable one, but from the
autoconf docs, one should usually use if test ! ... instead :
Hi,
I am trying to do a simple check to validate a value is a positive
integer. There are many variations to do this but in general this should
do the trick:
var=100
if echo $var | grep -Eq '^[0-9]+$' /dev/null 21; then
echo positive integer
else
echo something else
fi
if I put this
On Thu, Jun 6, 2013 at 5:00 AM, A.P. Horst wrote:
Also when I just have:
echo $var | grep -Eq '^[0-9]+$'
echo $?
--8--
I am on a win7 x64 machine with MinGW 3.20 and W32API 3.17
sh --version
GNU bash, version 3.1.17(1)-release (i686-pc-msys)
How is the var variable set? If you're using the
On 6 June 2013 12:12, Earnie Boyd wrote:
On Thu, Jun 6, 2013 at 5:00 AM, A.P. Horst wrote:
Also when I just have:
echo $var | grep -Eq '^[0-9]+$'
echo $?
--8--
I am on a win7 x64 machine with MinGW 3.20 and W32API 3.17
sh --version
GNU bash, version 3.1.17(1)-release (i686-pc-msys)
- Original Message -
A more robust, (and more portable), formulation may be:
echo $var | grep '^+\{0,1\}[0-9]\{1,\}$' /dev/null 21
Why fork, when straight shell will do?
case $var in
+*) tmp=$var ;;
*) tmp=+$var ;;
esac
case $tmp in
+*[!0-9]* | +) echo not numeric ;;
*)
On 6 June 2013 13:41, Eric Blake wrote:
A more robust, (and more portable), formulation may be:
echo $var | grep '^+\{0,1\}[0-9]\{1,\}$' /dev/null 21
Why fork, when straight shell will do?
case $var in
...
Agreed, avoiding the fork is a good idea, and I do often use case
Wait, why can't you use test $x -gt 0...?
-miles
--
Logic, n. The art of thinking and reasoning in strict accordance with the
limitations and incapacities of the human misunderstanding.
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On 7 Jun 2013, at 08:41, Miles Bader mi...@gnu.org wrote:
Wait, why can't you use test $x -gt 0...?
You mean test 0 -lt $x, otherwise if x starts with a hyphen (e.g -1) things
will go awry!
Cheers,
--
Gary V. Vaughan (gary AT gnu DOT org)
___
Gary V. Vaughan g...@gnu.org writes:
On 7 Jun 2013, at 08:41, Miles Bader mi...@gnu.org wrote:
Wait, why can't you use test $x -gt 0...?
You mean test 0 -lt $x, otherwise if x starts with a hyphen (e.g -1)
things will go awry!
I dunno, test here (both coreutils test, and the bash builtin)
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