shell script-remove certain characters

[jimmymj]

i am a newbie in linux script. i try to manipulate the param input name and get the expected output.
Here is example;
#! /bin/ksh
# $1 -< proj_request_tmp_table
param1=$1
#using cut or sed remove _tmp
export param1
echo "output: $param1 print out"
#--end of script

after remove _tmp here is my
expected output:output: proj_request_table print out

thanks in advance

[mrbruno]

How about:

$ cat untemp
for file in "$@"
do
  newfile=$(echo "$file" | sed 's/_tmp//')
  echo $newfile
done
$ untemp proj_request_tmp_table
proj_request_table
$

This handles multiple file names so I guess it's fancier than you might need. If a file name doesn't contain "_tmp", it should just return the original name.

[jimmymj]

Thank you so much!!!!!

[jimmymj]

I applied your code but output looks like that "output: afaweiraw printout"
would you mind take a look my code? i need help

#! /bin/ksh
# $1 -< proj_request_tmp_table
#param1=$1
param1='proj_request_tmp_table'
export param1
newfile =$(echo "$param1" | sed 's/_tmp//')
export newfile

echo "output: $newfile print out"
#--end of script

How about:

$ cat untemp
for file in "$@"
do
  newfile=$(echo "$file" | sed 's/_tmp//')
  echo $newfile
done
$ untemp proj_request_tmp_table
proj_request_table
$

This handles multiple file names so I guess it's fancier than you might need. If a file name doesn't contain "_tmp", it should just return the original name.

[mrbruno]

The biggest problem I see in your script is the space between newfile and the assignment operator in the statement calling sed. When I took it out, I think I got the behavior you expected. You can't have a space like that on either side of the assignment operator. If the value you're assigning to the variable has leading spaces, you're going to have to express the spaces (and perhaps the entire value) inside quotes or something.

Note that the exports are unnecessary. They don't hurt but they don't help in this case. Since you're just using the variables locally in the script, there's no need to export them. You only need to export if you're invoking an external script or command and you want it to run with that variable as an environment variable.

[mactruck]

are you just trying to remove tmp from the name?