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Top Forums Shell Programming and Scripting Giving "read" from standard input a timeout. Post 65224 by vgersh99 on Thursday 3rd of March 2005 03:49:00 PM
Old 03-03-2005
Quote:
Originally Posted by rello
Thank you both for your help. I am still having trouble since neither works with ksh.
I have tried modifying both and still am not having much luck.
strange - works just fine for me under ksh on Solaris.
have you looked at the link I've posted?

here's another way - quoted from the posted link:
Code:
#!/bin/ksh

read_timeout() {
  trap : USR1
  trap 'kill "$pid" 2> /dev/null' EXIT
  (sleep "$1" && kill -USR1 "$$") & pid=$!
  read "$2"
  ret=$?
  kill "$pid" 2> /dev/null
  trap - EXIT
  return "$ret"
}
read_timeout 5 var
printf 'Got: "%s" as $var\n' "$var"

 

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times(1)							   User Commands							  times(1)

NAME
times - shell built-in function to report time usages of the current shell SYNOPSIS
sh times ksh times DESCRIPTION
sh Print the accumulated user and system times for processes run from the shell. ksh Print the accumulated user and system times for the shell and for processes run from the shell. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), sh(1), time(1), attributes(5) SunOS 5.10 15 Apr 1994 times(1)
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