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Full Discussion: Scripts stopped in the shell
Top Forums Shell Programming and Scripting Scripts stopped in the shell Post 302673431 by mregine on Wednesday 18th of July 2012 12:27:34 AM
Old 07-18-2012
Sorry for being unresponsive - I'm still working on that script :-/
Quote:
Originally Posted by mirni
Try to send it into background instead of fg:
Code:
bg

When I do that, it gets stopped again after a few seconds :-/
Quote:
Originally Posted by mirni
So, what shell are you using? On what platform?
I use bash, on Debian lenny, logged in via ssh from a Mac OS X machine using Terminal.app

---------- Post updated at 06:27 AM ---------- Previous update was at 06:22 AM ----------

Quote:
Originally Posted by alister
A background job that tries to read from its teriminal is sent a signal which suspends it (SIGTTIN). The same may happen when trying to write to the terminal (SIGTTOU), but that depends on terminal settings (tostop).

If that job requires some input, if it is known ahead of time what it needs, you can redirect it. If it's trying to write to stdout or stderr, you may need to redirect those (or fiddle with your terminal's settings, if an attempt to write is the problem).

You probably want to use nohup. Not only will it redirect all the standard file streams, but it will ensure that your script will survive should the terminal go away and cause the shell to send SIGHUP to its jobs.

Regards,
Alister
Thanks for the ideas. I just wanted to stay I'm still working on that script and investigating what the problem might be. I've used nohup in the past and I can't remember whether there were problems with that too or not.
 

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LEARN ABOUT MINIX

nohup

NOHUP(1)                                                           User Commands                                                          NOHUP(1)

NAME

       nohup - run a command immune to hangups, with output to a non-tty

SYNOPSIS

       nohup COMMAND [ARG]...
       nohup OPTION

DESCRIPTION

       Run COMMAND, ignoring hangup signals.

       --help display this help and exit

       --version
              output version information and exit

       If  standard  input  is a terminal, redirect it from an unreadable file.  If standard output is a terminal, append output to 'nohup.out' if
       possible, '$HOME/nohup.out' otherwise.  If standard error is a terminal, redirect it to standard output.   To  save  output  to  FILE,  use
       'nohup COMMAND > FILE'.

       NOTE: your shell may have its own version of nohup, which usually supersedes the version described here.  Please refer to your shell's doc-
       umentation for details about the options it supports.

AUTHOR

       Written by Jim Meyering.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report nohup translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       Full documentation at: <http://www.gnu.org/software/coreutils/nohup>
       or available locally via: info '(coreutils) nohup invocation'

GNU coreutils 8.28                                                 January 2018                                                           NOHUP(1)
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