I just started with awk and sed, I am more of a perl/C/C++ person. I
have a quick question reguarding the pipe. In Awk, I am trying to use this
construct.
while ((getline < "somedata.txt") > 0)
{print | "mv"} #or could be "mv -v" for verbose.
Is it possible that "print" is no longer printing the value of
getline, if so how do I correct it?
Arnold Robbins comments:
The problem here is that `mv' doesn't read standard input, it only
processes command lines. Assuming that your data is something like:
oldfile newfile
You can do things two ways:
# build the command and execute it
while ((getline < "somedata.txt") > 0) {
command = "mv " $1 " " $2
system(command)
}
close("somedata.txt")
or this way:
# send commands to the shell
while ((getline < "somedata.txt") > 0) {
printf("mv %s %s\n", $1, $2) | "sh"
}
close("somedata.txt")
close("sh")
