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Top Forums Shell Programming and Scripting lost the $ prompt - am I spawning shells?? Post 302518884 by landog on Monday 2nd of May 2011 10:10:51 AM
Old 05-02-2011
lost the $ prompt - am I spawning shells??

When trying to get the correct syntax to cron a script that creates a file with the date stamp as its output, sometimes I get these results:

- from the command line, I may encounter an error that leaves me without the usual $ prompt. Am I in a new shell? I try to exit it with 'exit' or :q! and cannot get my prompt back. I can exit my putty session and start a new one to get back to a $ prompt.

- from cron, I get nothing - no error and no output file

My concern is that I am spawning processes that keep running, or shells that never die. Is that a valid concern? Is there a way I can check whether I am doing this?

Thanks,
-dog
 

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shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list. Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)). FILES
/etc/shells lists shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.10 4 Jun 2001 shells(4)
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