Problems with while in bash

Question

I am doing a bash script with the web api of checkpoint.

126: No such file or directory

this error refers to line 25 in which I have the next sentence:

while [$reglas < $n_reglas ];do

I have tried changing that to:

while [$reglas -lt $n_reglas ];do

but the error persist and I am not sure of what is the real problem.

The variables are defined like this:

reglas=1
n_reglas=$(echo $rulebase_list | jq '.total')

and I have printed their value in order to check that they are taking the correct value. Any idea of which is the problem? Thanks!

Welcome to SO, on SO OP has to post samples of input and output in code tags along with that efforts that OP has put to solve his/her problem too in post, so kindly do so and let us know then. This is not clear. — RavinderSingh13, Nov 14 '18 at 09:00
Try `while [ $reglas -lt $n_reglas ]; do` (note the space after the opening bracket) or `while ((reglas < n_reglas)); do`. — TrebledJ, Nov 14 '18 at 09:02
Happy that the answer helped, what was the cause / what fixed it? Could you write a short comment to my answer? I might be able to update it to be more helpful for others comming along this road :) — Michael Kargl, Nov 14 '18 at 16:06
the bug was that I was doing reglas=$reglas+1 and that make a string which was 1+1, so I use reglas=$(echo $((regkas+1))) as in the example of Michael — unai abrisketa sanchez, Nov 15 '18 at 10:31

score 1 · Accepted Answer · answered Nov 14 '18 at 09:19

Unfortunately it is not very clear what the actual problem is. Please try to reproduce the problem in a small code snippet that we can execute and troubleshoot. This way we don't need to guess and can provide more precise help.

Here is a small snippet with a ton of assumptions.

reglas=1
n_reglas=4 # https://jqplay.org/s/BCTXyJ4NLc

while [ $reglas -lt $n_reglas ]; do
   echo $reglas
   reglas=$(($reglas+1))
done

# $bash -f main.sh
# 1
# 2
# 3

Problems with while in bash

1 Answers1