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Script Question regarding finding and renaming a CSV file

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

I am trying to write a script that starts off with testing for the existence of a CSV file. If it finds one, rename it to listing.txt.

This is what I have but it doesn't work.

if [ -f "*.csv" ];
 then
 cp *.csv listing.txt
fi

shell-script

share|improve this question

edited Apr 10 at 0:15

Jeff Schaller♦

45k1164147

asked Apr 10 at 0:00

Software InfoSoftware Info

1

New contributor

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

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What if there are multiple CSV files in the directory you're searching? You can't give them all the same name.
  
  – igal
  Apr 10 at 0:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  There will only be one at any given time. At the end, the script will delete the file.
  
  – Software Info
  Apr 10 at 0:16
  

  
  
  
  

add a comment | 

0

I am trying to write a script that starts off with testing for the existence of a CSV file. If it finds one, rename it to listing.txt.

This is what I have but it doesn't work.

if [ -f "*.csv" ];
 then
 cp *.csv listing.txt
fi

shell-script

share|improve this question

edited Apr 10 at 0:15

Jeff Schaller♦

45k1164147

asked Apr 10 at 0:00

Software InfoSoftware Info

1

New contributor

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

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What if there are multiple CSV files in the directory you're searching? You can't give them all the same name.
  
  – igal
  Apr 10 at 0:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  There will only be one at any given time. At the end, the script will delete the file.
  
  – Software Info
  Apr 10 at 0:16
  

  
  
  
  

add a comment | 

I am trying to write a script that starts off with testing for the existence of a CSV file. If it finds one, rename it to listing.txt.

This is what I have but it doesn't work.

if [ -f "*.csv" ];
 then
 cp *.csv listing.txt
fi

shell-script

share|improve this question

edited Apr 10 at 0:15

Jeff Schaller♦

45k1164147

asked Apr 10 at 0:00

Software InfoSoftware Info

1

New contributor

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

if [ -f "*.csv" ];
 then
 cp *.csv listing.txt
fi

share|improve this question

edited Apr 10 at 0:15

Jeff Schaller♦

45k1164147

asked Apr 10 at 0:00

Software InfoSoftware Info

1

New contributor

Software Info 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

edited Apr 10 at 0:15

Jeff Schaller♦

45k1164147

asked Apr 10 at 0:00

Software InfoSoftware Info

1

New contributor

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

edited Apr 10 at 0:15

Jeff Schaller♦

45k1164147

edited Apr 10 at 0:15

Jeff Schaller♦

45k1164147

asked Apr 10 at 0:00

Software InfoSoftware Info

1

New contributor

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

asked Apr 10 at 0:00

Software InfoSoftware Info

1

1 Answer
1

active

oldest

votes

0

Your existing code tests for the existence of a file called *.csv (literally). This is why it does not work. It does that because the * is within double quotes.

Using [ -f *.csv ] will not work as expected if there are multiple files matching the pattern. If there are multiple files matching *.csv, the cp command will additionally not work properly, unless listing.txt is the name of a directory.

To rename the first of the files matching the filename globbing pattern *.cvs in the current directory, do this:

#!/bin/sh

set -- *.csv

while [ "$#" -gt 0 ] && [ ! -f "$1" ]; do
 shift
done

if [ -f "$1" ]; then
 mv -- "$1" listing.txt
fi

This first sets the positional parameters, $1, $2, etc., the all names matching *.csv in the current directory. Then it starts looking for the first regular file, or symbolic link to a regular file, among the matched names (the code assumes that the *.csv glob may expand to directory names etc.). If a regular file, or a symbolic link to one, is found, it renames that file to listing.txt.

In the zsh shell:

mv -- *.csv(-.[1]) listing.txt

This uses a glob modifier for the *.csv globbing pattern that returns the first regular file or symbolic link that matches the pattern.

share|improve this answer

answered Apr 10 at 7:32

Kusalananda♦Kusalananda

141k18263439

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great. I will try that. Thanks so much.
  
  – Software Info
  11 hours ago
  

  
  
  
  

add a comment | 

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0

Your existing code tests for the existence of a file called *.csv (literally). This is why it does not work. It does that because the * is within double quotes.

Using [ -f *.csv ] will not work as expected if there are multiple files matching the pattern. If there are multiple files matching *.csv, the cp command will additionally not work properly, unless listing.txt is the name of a directory.

To rename the first of the files matching the filename globbing pattern *.cvs in the current directory, do this:

#!/bin/sh

set -- *.csv

while [ "$#" -gt 0 ] && [ ! -f "$1" ]; do
 shift
done

if [ -f "$1" ]; then
 mv -- "$1" listing.txt
fi

This first sets the positional parameters, $1, $2, etc., the all names matching *.csv in the current directory. Then it starts looking for the first regular file, or symbolic link to a regular file, among the matched names (the code assumes that the *.csv glob may expand to directory names etc.). If a regular file, or a symbolic link to one, is found, it renames that file to listing.txt.

In the zsh shell:

mv -- *.csv(-.[1]) listing.txt

This uses a glob modifier for the *.csv globbing pattern that returns the first regular file or symbolic link that matches the pattern.

share|improve this answer

answered Apr 10 at 7:32

Kusalananda♦Kusalananda

141k18263439

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great. I will try that. Thanks so much.
  
  – Software Info
  11 hours ago
  

  
  
  
  

add a comment | 

0

Your existing code tests for the existence of a file called *.csv (literally). This is why it does not work. It does that because the * is within double quotes.

Using [ -f *.csv ] will not work as expected if there are multiple files matching the pattern. If there are multiple files matching *.csv, the cp command will additionally not work properly, unless listing.txt is the name of a directory.

To rename the first of the files matching the filename globbing pattern *.cvs in the current directory, do this:

#!/bin/sh

set -- *.csv

while [ "$#" -gt 0 ] && [ ! -f "$1" ]; do
 shift
done

if [ -f "$1" ]; then
 mv -- "$1" listing.txt
fi

This first sets the positional parameters, $1, $2, etc., the all names matching *.csv in the current directory. Then it starts looking for the first regular file, or symbolic link to a regular file, among the matched names (the code assumes that the *.csv glob may expand to directory names etc.). If a regular file, or a symbolic link to one, is found, it renames that file to listing.txt.

In the zsh shell:

mv -- *.csv(-.[1]) listing.txt

This uses a glob modifier for the *.csv globbing pattern that returns the first regular file or symbolic link that matches the pattern.

share|improve this answer

answered Apr 10 at 7:32

Kusalananda♦Kusalananda

141k18263439

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great. I will try that. Thanks so much.
  
  – Software Info
  11 hours ago
  

  
  
  
  

add a comment | 

Your existing code tests for the existence of a file called *.csv (literally). This is why it does not work. It does that because the * is within double quotes.

Using [ -f *.csv ] will not work as expected if there are multiple files matching the pattern. If there are multiple files matching *.csv, the cp command will additionally not work properly, unless listing.txt is the name of a directory.

To rename the first of the files matching the filename globbing pattern *.cvs in the current directory, do this:

#!/bin/sh

set -- *.csv

while [ "$#" -gt 0 ] && [ ! -f "$1" ]; do
 shift
done

if [ -f "$1" ]; then
 mv -- "$1" listing.txt
fi

This first sets the positional parameters, $1, $2, etc., the all names matching *.csv in the current directory. Then it starts looking for the first regular file, or symbolic link to a regular file, among the matched names (the code assumes that the *.csv glob may expand to directory names etc.). If a regular file, or a symbolic link to one, is found, it renames that file to listing.txt.

In the zsh shell:

mv -- *.csv(-.[1]) listing.txt

This uses a glob modifier for the *.csv globbing pattern that returns the first regular file or symbolic link that matches the pattern.

share|improve this answer

answered Apr 10 at 7:32

Kusalananda♦Kusalananda

141k18263439

#!/bin/sh

set -- *.csv

while [ "$#" -gt 0 ] && [ ! -f "$1" ]; do
 shift
done

if [ -f "$1" ]; then
 mv -- "$1" listing.txt
fi

mv -- *.csv(-.[1]) listing.txt

share|improve this answer

answered Apr 10 at 7:32

Kusalananda♦Kusalananda

141k18263439

answered Apr 10 at 7:32

Kusalananda♦Kusalananda

141k18263439

answered Apr 10 at 7:32

Kusalananda♦Kusalananda

141k18263439