Loop in macOS not working
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I need to execute the following shell script in my macOS terminal.
The loop never executes more than its first iteration.
function execute_function() {
# Launch job
number_of_jobs=$1
echo "Launching ${number_of_jobs} jobs"
for i in {1..$1}; do
job_id=`head /dev/urandom | tr -dc A-Z0-9 | head -c 6 ; echo ''`
echo "Launching Job: $job_id"
echo $i
done
}
When I run it, I always get:
execute_function 10
Launching 10 jobs
Launching Job: XX9BWC
{1..10}
The same happens if I replace: $1 with $number_of_jobs or "${number_of_jobs}"
shell-script shell osx brace-expansion
edited Apr 2 at 8:02
Kusalananda♦
140k17261435
asked Apr 2 at 4:55
spicyramenspicyramen
1334
New contributor
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I need to execute the following shell script in my macOS terminal.
The loop never executes more than its first iteration.
function execute_function() {
# Launch job
number_of_jobs=$1
echo "Launching ${number_of_jobs} jobs"
for i in {1..$1}; do
job_id=`head /dev/urandom | tr -dc A-Z0-9 | head -c 6 ; echo ''`
echo "Launching Job: $job_id"
echo $i
done
}
When I run it, I always get:
execute_function 10
Launching 10 jobs
Launching Job: XX9BWC
{1..10}
The same happens if I replace: $1 with $number_of_jobs or "${number_of_jobs}"
shell-script shell osx brace-expansion
edited Apr 2 at 8:02
Kusalananda♦
140k17261435
asked Apr 2 at 4:55
spicyramenspicyramen
1334
New contributor
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I need to execute the following shell script in my macOS terminal.
The loop never executes more than its first iteration.
function execute_function() {
# Launch job
number_of_jobs=$1
echo "Launching ${number_of_jobs} jobs"
for i in {1..$1}; do
job_id=`head /dev/urandom | tr -dc A-Z0-9 | head -c 6 ; echo ''`
echo "Launching Job: $job_id"
echo $i
done
}
When I run it, I always get:
execute_function 10
Launching 10 jobs
Launching Job: XX9BWC
{1..10}
The same happens if I replace: $1 with $number_of_jobs or "${number_of_jobs}"
shell-script shell osx brace-expansion
edited Apr 2 at 8:02
Kusalananda♦
140k17261435
asked Apr 2 at 4:55
spicyramenspicyramen
1334
New contributor
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I need to execute the following shell script in my macOS terminal.
The loop never executes more than its first iteration.
function execute_function() {
# Launch job
number_of_jobs=$1
echo "Launching ${number_of_jobs} jobs"
for i in {1..$1}; do
job_id=`head /dev/urandom | tr -dc A-Z0-9 | head -c 6 ; echo ''`
echo "Launching Job: $job_id"
echo $i
done
}
When I run it, I always get:
execute_function 10
Launching 10 jobs
Launching Job: XX9BWC
{1..10}
The same happens if I replace: $1 with $number_of_jobs or "${number_of_jobs}"
shell-script shell osx brace-expansion
shell-script shell osx brace-expansion
edited Apr 2 at 8:02
Kusalananda♦
140k17261435
asked Apr 2 at 4:55
spicyramenspicyramen
1334
New contributor
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Apr 2 at 8:02
Kusalananda♦
140k17261435
asked Apr 2 at 4:55
spicyramenspicyramen
1334
New contributor
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Apr 2 at 8:02
Kusalananda♦
140k17261435
edited Apr 2 at 8:02
Kusalananda♦
140k17261435
edited Apr 2 at 8:02
Kusalananda♦
140k17261435
140k17261435
asked Apr 2 at 4:55
spicyramenspicyramen
1334
New contributor
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Apr 2 at 4:55
spicyramenspicyramen
1334
asked Apr 2 at 4:55
spicyramenspicyramen
1334
1334
New contributor
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
spicyramen is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
The problem here is variable in braces expansion.
Try rewriting it to
for ((i=1;i<=$1;i++))
do
#your code here
done
answered Apr 2 at 5:08
Jakub JindraJakub Jindra
608514
That worked perfectly
– spicyramen
Apr 2 at 5:22
add a comment |
Your script is written for zsh but you are executing it with bash.
bash does not support using variables as ranges in brace-expansions.
To resolve this, simply arrange for the script or function be executed in a zsh shell (especially if the script is longer than what you are showing and is using other zsh features). This shell is installed by default on macOS as /bin/zsh. You may add #!/bin/zsh as the first line in the script to have it execute with zsh by default.
See also:
- Listing numbered files using wildcard sequence with predefined range
- How can I use $variable in a shell brace expansion of a sequence?
- Does the shebang determine the shell which runs the script?
answered Apr 2 at 5:28
Kusalananda♦Kusalananda
140k17261435
1
include#!/bin/zshas first line. (you may need to check the path.
– ctrl-alt-delor
Apr 2 at 7:57
what about#!/usr/bin/env zsh?
– Jakub Jindra
Apr 2 at 8:46
@JakubJindra That would work to, but the default location ofzshis/bin/zshon macOS. Obviously, you may want to useenvif you need to use a 3rd-party installation ofzsh. However, this is not the essence of this particular question.
– Kusalananda♦
Apr 2 at 8:50
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
The problem here is variable in braces expansion.
Try rewriting it to
for ((i=1;i<=$1;i++))
do
#your code here
done
answered Apr 2 at 5:08
Jakub JindraJakub Jindra
608514
That worked perfectly
– spicyramen
Apr 2 at 5:22
add a comment |
The problem here is variable in braces expansion.
Try rewriting it to
for ((i=1;i<=$1;i++))
do
#your code here
done
answered Apr 2 at 5:08
Jakub JindraJakub Jindra
608514
That worked perfectly
– spicyramen
Apr 2 at 5:22
add a comment |
The problem here is variable in braces expansion.
Try rewriting it to
for ((i=1;i<=$1;i++))
do
#your code here
done
answered Apr 2 at 5:08
Jakub JindraJakub Jindra
608514
The problem here is variable in braces expansion.
Try rewriting it to
for ((i=1;i<=$1;i++))
do
#your code here
done
answered Apr 2 at 5:08
Jakub JindraJakub Jindra
608514
edited Apr 2 at 6:59
answered Apr 2 at 5:08
Jakub JindraJakub Jindra
608514
answered Apr 2 at 5:08
Jakub JindraJakub Jindra
608514
answered Apr 2 at 5:08
Jakub JindraJakub Jindra
608514
608514
That worked perfectly
– spicyramen
Apr 2 at 5:22
add a comment |
That worked perfectly
– spicyramen
Apr 2 at 5:22
That worked perfectly
– spicyramen
Apr 2 at 5:22
That worked perfectly
– spicyramen
Apr 2 at 5:22
add a comment |
Your script is written for zsh but you are executing it with bash.
bash does not support using variables as ranges in brace-expansions.
To resolve this, simply arrange for the script or function be executed in a zsh shell (especially if the script is longer than what you are showing and is using other zsh features). This shell is installed by default on macOS as /bin/zsh. You may add #!/bin/zsh as the first line in the script to have it execute with zsh by default.
See also:
- Listing numbered files using wildcard sequence with predefined range
- How can I use $variable in a shell brace expansion of a sequence?
- Does the shebang determine the shell which runs the script?
answered Apr 2 at 5:28
Kusalananda♦Kusalananda
140k17261435
1
include#!/bin/zshas first line. (you may need to check the path.
– ctrl-alt-delor
Apr 2 at 7:57
what about#!/usr/bin/env zsh?
– Jakub Jindra
Apr 2 at 8:46
@JakubJindra That would work to, but the default location ofzshis/bin/zshon macOS. Obviously, you may want to useenvif you need to use a 3rd-party installation ofzsh. However, this is not the essence of this particular question.
– Kusalananda♦
Apr 2 at 8:50
add a comment |
Your script is written for zsh but you are executing it with bash.
bash does not support using variables as ranges in brace-expansions.
To resolve this, simply arrange for the script or function be executed in a zsh shell (especially if the script is longer than what you are showing and is using other zsh features). This shell is installed by default on macOS as /bin/zsh. You may add #!/bin/zsh as the first line in the script to have it execute with zsh by default.
See also:
- Listing numbered files using wildcard sequence with predefined range
- How can I use $variable in a shell brace expansion of a sequence?
- Does the shebang determine the shell which runs the script?
answered Apr 2 at 5:28
Kusalananda♦Kusalananda
140k17261435
1
include#!/bin/zshas first line. (you may need to check the path.
– ctrl-alt-delor
Apr 2 at 7:57
what about#!/usr/bin/env zsh?
– Jakub Jindra
Apr 2 at 8:46
@JakubJindra That would work to, but the default location ofzshis/bin/zshon macOS. Obviously, you may want to useenvif you need to use a 3rd-party installation ofzsh. However, this is not the essence of this particular question.
– Kusalananda♦
Apr 2 at 8:50
add a comment |
Your script is written for zsh but you are executing it with bash.
bash does not support using variables as ranges in brace-expansions.
To resolve this, simply arrange for the script or function be executed in a zsh shell (especially if the script is longer than what you are showing and is using other zsh features). This shell is installed by default on macOS as /bin/zsh. You may add #!/bin/zsh as the first line in the script to have it execute with zsh by default.
See also:
- Listing numbered files using wildcard sequence with predefined range
- How can I use $variable in a shell brace expansion of a sequence?
- Does the shebang determine the shell which runs the script?
answered Apr 2 at 5:28
Kusalananda♦Kusalananda
140k17261435
Your script is written for zsh but you are executing it with bash.
bash does not support using variables as ranges in brace-expansions.
To resolve this, simply arrange for the script or function be executed in a zsh shell (especially if the script is longer than what you are showing and is using other zsh features). This shell is installed by default on macOS as /bin/zsh. You may add #!/bin/zsh as the first line in the script to have it execute with zsh by default.
See also:
- Listing numbered files using wildcard sequence with predefined range
- How can I use $variable in a shell brace expansion of a sequence?
- Does the shebang determine the shell which runs the script?
answered Apr 2 at 5:28
Kusalananda♦Kusalananda
140k17261435
edited Apr 2 at 7:59
answered Apr 2 at 5:28
Kusalananda♦Kusalananda
140k17261435
answered Apr 2 at 5:28
Kusalananda♦Kusalananda
140k17261435
answered Apr 2 at 5:28
Kusalananda♦Kusalananda
140k17261435
140k17261435
1
include#!/bin/zshas first line. (you may need to check the path.
– ctrl-alt-delor
Apr 2 at 7:57
what about#!/usr/bin/env zsh?
– Jakub Jindra
Apr 2 at 8:46
@JakubJindra That would work to, but the default location ofzshis/bin/zshon macOS. Obviously, you may want to useenvif you need to use a 3rd-party installation ofzsh. However, this is not the essence of this particular question.
– Kusalananda♦
Apr 2 at 8:50
add a comment |
1
include#!/bin/zshas first line. (you may need to check the path.
– ctrl-alt-delor
Apr 2 at 7:57
what about#!/usr/bin/env zsh?
– Jakub Jindra
Apr 2 at 8:46
@JakubJindra That would work to, but the default location ofzshis/bin/zshon macOS. Obviously, you may want to useenvif you need to use a 3rd-party installation ofzsh. However, this is not the essence of this particular question.
– Kusalananda♦
Apr 2 at 8:50
1
1
include
#!/bin/zsh as first line. (you may need to check the path.– ctrl-alt-delor
Apr 2 at 7:57
include
#!/bin/zsh as first line. (you may need to check the path.– ctrl-alt-delor
Apr 2 at 7:57
what about
#!/usr/bin/env zsh?– Jakub Jindra
Apr 2 at 8:46
what about
#!/usr/bin/env zsh?– Jakub Jindra
Apr 2 at 8:46
@JakubJindra That would work to, but the default location of
zsh is /bin/zsh on macOS. Obviously, you may want to use env if you need to use a 3rd-party installation of zsh. However, this is not the essence of this particular question.– Kusalananda♦
Apr 2 at 8:50
@JakubJindra That would work to, but the default location of
zsh is /bin/zsh on macOS. Obviously, you may want to use env if you need to use a 3rd-party installation of zsh. However, this is not the essence of this particular question.– Kusalananda♦
Apr 2 at 8:50
add a comment |
spicyramen is a new contributor. Be nice, and check out our Code of Conduct.
spicyramen is a new contributor. Be nice, and check out our Code of Conduct.
spicyramen is a new contributor. Be nice, and check out our Code of Conduct.
spicyramen is a new contributor. Be nice, and check out our Code of Conduct.
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