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Join Date: Oct 2007
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Newbie Poster
How do I change my file extension from me.cpp to me.out or me.cpp to me.exe using Bash scripting.
Thanks!
Thanks!
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Join Date: Feb 2006
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filename=me.cpp
# If you use ksh or bash
filename=${filename%cpp}out
# if you use sh
filename=`echo $filename | sed -e s/cpp$/out/` Last edited by masijade : Oct 19th, 2007 at 2:36 am.
Java Programmer and Sun Systems Administrator
----------------------------------------------
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
----------------------------------------------
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
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Join Date: Oct 2007
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Newbie Poster
I want to use either egrep or expr only.
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Join Date: Feb 2006
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Good for you. Experiment a bit.
Java Programmer and Sun Systems Administrator
----------------------------------------------
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
----------------------------------------------
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
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Join Date: Oct 2007
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Newbie Poster
I have tried using awk but I still don't see another way of doing the same code but using expr.
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Join Date: Feb 2006
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Give a better description of what it is you want to do. Have you even tried those things that were posted?
Java Programmer and Sun Systems Administrator
----------------------------------------------
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
----------------------------------------------
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
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Join Date: Oct 2007
Posts: 13
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Newbie Poster
This is what I have from the example:
#!/bin/bash
#
# Replaces blanks with underscores in all the filenames
# of the current directory.
i=0
for filename in *
do
echo "$filename" | grep -q " "
if [ $? -eq 0 ]
then
fname=$filename
n=`echo $fname | sed -e "s/ /_/g"`
mv "$fname" "$n"
((i++1))
fi
done
echo "$i file(s), done."
exit 0
#!/bin/bash
#
# Replaces blanks with underscores in all the filenames
# of the current directory.
i=0
for filename in *
do
echo "$filename" | grep -q " "
if [ $? -eq 0 ]
then
fname=$filename
n=`echo $fname | sed -e "s/ /_/g"`
mv "$fname" "$n"
((i++1))
fi
done
echo "$i file(s), done."
exit 0
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Join Date: Oct 2007
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Newbie Poster
Yes I did use awk. From one of my reference books that don't give solutions, it said to try using expr or egrep for string manipulation.
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Join Date: Feb 2006
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Well, it's bash, so as I said in my first post
However, .cpp to .out usually means you want to compile the files, which has nothing to do with simply renaming them like this.
for filename in *.cpp
do
mv "${filename}" "${filename%cpp}out"
doneHowever, .cpp to .out usually means you want to compile the files, which has nothing to do with simply renaming them like this.
Java Programmer and Sun Systems Administrator
----------------------------------------------
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
----------------------------------------------
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
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