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Full Discussion: Background and Foreground of a process within a script
Top Forums Shell Programming and Scripting Background and Foreground of a process within a script Post 302240540 by otheus on Friday 26th of September 2008 03:46:09 AM
Old 09-26-2008
Quote:
Originally Posted by ctruhn
1) Start the process in the background and then using the 'fg' command bring it back to the foreground at the end of the script. i.e:
See the "wait" builtin command ("help wait" in bash). You could do
Code:
#! /bin/bash

# Using sleeps for an example, obviously this isn't what my script will do

sleep 100 &
sleep 200 &  # <- this is the process I want in the foreground but must be run BEFORE the next line
sleep 300 &

jobs -l  # For demonstration purposes only

wait %2

Quote:
2) Is there a way to bring a background process that is started by another shell (same user, or if I must use sudo I will) to the foreground of a different shell?
I don't think this is normally possible without being a debugger. However, it is possible to use screen to attach login sessions to different terminals. But based on what else you described, I don't think that's possible.

It might be in theory possible to use gdb to attach to a process and run a script of debugging commands, such as "b exit(); c ; p value[2]"
 

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LEARN ABOUT OPENSOLARIS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a    Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.11							    30 Jan 2004 							 script(1)
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