[SOLVED] BASH in new SUSE 42.2, command EXPR does not work?

stamcose · 04-29-2017, 05:21 AM

The command "expr" does not seem to work at all with the BASH included in release 42.2! Error message:

"No child process".

What is wrong?

stamcose · 04-29-2017, 05:28 AM

The attachment was missing!

Jjanel · 04-29-2017, 05:57 AM

Did you notice it is using YOUR ~/bin/expr? What is 'that'? cd /home/mats/bin; ls -l expr; file expr; ... (maybe cat it!)
Try \expr 1 + 1 (backslash to force 'system' expr)

ondoho · 04-29-2017, 06:06 AM

...additionally, expr is not part of bash, it's part of coreutils.
but bash can do integer arithmetics all by itself:

Code:

echo $((1 + 1))

Habitual · 04-29-2017, 06:09 AM

Code:

which expr

stamcose · 04-29-2017, 07:17 AM

Sorry, my mistake! By mistake there was an "expr" in /home/mats/bin that was taken instead of the real "expr". This "expr" was in fact the simple test:

a=`expr 1 + 1`
echo $a

Because of the name-collisition it was then calling itself! I have no idea how this test got into this directory with this name!

I did not think of this possibility! But I really should like Jjanel have noted "/home/mats/bin" in the prompt!

Issue solved!

BW-userx · 04-29-2017, 08:12 AM

yeah if that is some expr exe in that dir /.../.../.../expr then it'd be dot forword slash command ./expr 1 + 1 BUT if you got an expr already installed in /usr/bin then you should not be having this issue becsuse it'd already just work because /usr/bin should be in your PATH - echo $PATH to see

Code:

userx%slackwhere ⚡ ~ ⚡> ls /usr/bin/expr
/usr/bin/expr

BASH - VERSION

Quote:

userx%slackwhere ⚡ ~ ⚡> echo $BASH_VERSION
echo $BASH_VERSION
4.3.46(1)-release

expr

Code:

userx%slackwhere ⚡ ~ ⚡> expr 1 + 5
6

BW-userx · 04-29-2017, 08:30 AM

Quote:

Originally Posted by stamcose

The attachment was missing!

just a little "just so you know" on this one. you can click edit -> advance -> then add the image then save within the same post.

ondoho · 04-29-2017, 03:31 PM

...also a simple copy-paste of text is infinitely preferable to a screenshot, which is a complte waste of bandwidth in this situation.