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Top Forums Shell Programming and Scripting Copy from/to file, if arg 'ok' Post 302894555 by MadeInGermany on Wednesday 26th of March 2014 06:39:43 AM
Old 03-26-2014
In a while loop we read the input file line by line, and write each line to the output file.
We associate descriptors 3 & 4 rather than the default 0 & 1, so another read/print (for interactive i/o) won't interfere
Code:
#!/bin/sh
while read line <&3
do
  name=`expr "$line" : "Name: *\([^,]*\)"`
  printf "Is %ss status okay y/n? " $name
  read status
  if [ "$status" = "y" ]
  then
    status="ok"
  else
    status="-"
  fi
  printf "$line, Status: $status\n" >&4
done 3< file 4> newfile


Last edited by MadeInGermany; 03-26-2014 at 08:45 AM.. Reason: 0 & 1 not 1 & 2
These 2 Users Gave Thanks to MadeInGermany For This Post:
 

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line(1)                                                            User Commands                                                           line(1)

NAME
line - read one line SYNOPSIS
line DESCRIPTION
The line utility copies one line (up to and including a new-line) from the standard input and writes it on the standard output. It returns an exit status of 1 on EOF and always prints at least a new-line. It is often used within shell files to read from the user's terminal. EXIT STATUS
Exit status is: 0 Successful completion >0 End-of-file on input. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
sh(1), read(2), attributes(5) SunOS 5.10 1 Feb 1995 line(1)
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