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Bash String Concat issues [duplicate]

bash string extractionWhy does bash add single quotes to unquoted failed pathname expansions in a command before executing it?Can't concat file paths, permission deniedbreaking out of command loop but exit code not the reason?How to use bash's complete or compgen -C (command) option?compare string in bashSet comparator with variables within a variable, then have shell expand those variables each time it's echo'dHow to prevent parameter expansion around a variable I want to be resolved?Bash String manipulation when string contains parenthesesBash Script general questions

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0

This question already has an answer here:

• 
  How can we run a command stored in a variable?
  
  3 answers
  
  


• 
  Why does my shell script choke on whitespace or other special characters?
  
  4 answers
  
  

What seems to be going on here with the single quotes that are getting added to my concat'ed string? Something caused by the expansion of close($i)?

   for i in ${pid_fd_arr=[@]}

    do

        close_cmd+=" -ex "

        close_cmd+="p close($i)"

    done

    close_cmd+=" -ex detach -ex quit"

    echo $close_cmd

After all is said and done I see the following:

gdb --pid 1826 -batch -ex p 'close(15)' -ex detach -ex quit

The single quotes around close is causing the execution of this string to break. Any help would be greatly appreciated.

Desired:
gdb --pid 1826 -batch -ex 'p close(15)' -ex detach -ex quit

bash shell-script

share|improve this question

asked 3 hours ago

Griff0417Griff0417

1

New contributor

Griff0417 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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marked as duplicate by Kusalananda♦ bash
Users with the  bash badge can single-handedly close bash questions as duplicates and reopen them as needed.

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3 hours ago

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

add a comment | 

0

This question already has an answer here:

• 
  How can we run a command stored in a variable?
  
  3 answers
  
  


• 
  Why does my shell script choke on whitespace or other special characters?
  
  4 answers
  
  

What seems to be going on here with the single quotes that are getting added to my concat'ed string? Something caused by the expansion of close($i)?

   for i in ${pid_fd_arr=[@]}

    do

        close_cmd+=" -ex "

        close_cmd+="p close($i)"

    done

    close_cmd+=" -ex detach -ex quit"

    echo $close_cmd

After all is said and done I see the following:

gdb --pid 1826 -batch -ex p 'close(15)' -ex detach -ex quit

The single quotes around close is causing the execution of this string to break. Any help would be greatly appreciated.

Desired:
gdb --pid 1826 -batch -ex 'p close(15)' -ex detach -ex quit

bash shell-script

share|improve this question

asked 3 hours ago

Griff0417Griff0417

1

New contributor

Griff0417 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

marked as duplicate by Kusalananda♦ bash
Users with the  bash badge can single-handedly close bash questions as duplicates and reopen them as needed.

StackExchange.ready(function() {
if (StackExchange.options.isMobile) return;

$('.dupe-hammer-message-hover:not(.hover-bound)').each(function() {
var $hover = $(this).addClass('hover-bound'),
$msg = $hover.siblings('.dupe-hammer-message');

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});
3 hours ago

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

add a comment | 

This question already has an answer here:

• 
  How can we run a command stored in a variable?
  
  3 answers
  
  


• 
  Why does my shell script choke on whitespace or other special characters?
  
  4 answers
  
  

What seems to be going on here with the single quotes that are getting added to my concat'ed string? Something caused by the expansion of close($i)?

   for i in ${pid_fd_arr=[@]}

    do

        close_cmd+=" -ex "

        close_cmd+="p close($i)"

    done

    close_cmd+=" -ex detach -ex quit"

    echo $close_cmd

After all is said and done I see the following:

gdb --pid 1826 -batch -ex p 'close(15)' -ex detach -ex quit

The single quotes around close is causing the execution of this string to break. Any help would be greatly appreciated.

Desired:
gdb --pid 1826 -batch -ex 'p close(15)' -ex detach -ex quit

bash shell-script

share|improve this question

asked 3 hours ago

Griff0417Griff0417

1

New contributor

Griff0417 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

   for i in ${pid_fd_arr=[@]}

    do

        close_cmd+=" -ex "

        close_cmd+="p close($i)"

    done

    close_cmd+=" -ex detach -ex quit"

    echo $close_cmd

gdb --pid 1826 -batch -ex p 'close(15)' -ex detach -ex quit

share|improve this question

asked 3 hours ago

Griff0417Griff0417

1

New contributor

Griff0417 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked 3 hours ago

Griff0417Griff0417

1

New contributor

Griff0417 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 3 hours ago

Griff0417Griff0417

1

New contributor

Griff0417 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 3 hours ago

Griff0417Griff0417

1