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Top Forums Shell Programming and Scripting Identify variables used in the shell script Post 302786933 by CarloM on Thursday 28th of March 2013 12:05:18 PM
Old 03-28-2013
Missed p? Seems to be matching too much as well (AIX):
Code:
[user@host]  echo '/\$var/temp_dir/\${var2}\${var3}.log'  | sed -n 's/.*\(\$[a-zA-Z0-9]*\).*/\1/'
[user@host]  echo '/\$var/temp_dir/\${var2}\${var3}.log'  | sed -n 's/.*\(\$[a-zA-Z0-9]*\).*/\1/p'
$

You could have something along the lines of:
Code:
 echo '/$var/temp_dir/${var2}$var3.log'  | sed -n 's/[^$]*\($[[:alnum:]]*\)[^[:alnum:]].*/\1/p'
$var

but it will only handle 1 variable per line, and probably doesn't deal correctly with shell builtins...
 

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STARTSRV(8)						      System Manager's Manual						       STARTSRV(8)

NAME
startsrv - invoke ttysrv for a particular host. SYNOPSIS
startsrv host DESCRIPTION
startsrv fires up ttysrv for a given host. It will kill any already running instance for that host, then read /etc/remote- tty/opt/<host>.srv for any options to pass to ttysrv (defaulting to those that set 9600,8n1), /etc/remote-tty/prot/<host>.sock for the per- missions the socket should be set to (default 660), /etc/remote-tty/owner/<host>.sock for the owner of the socket (default rttymgr:dialout) and /etc/remote-tty/prot/<host>.log for the permissions of the logfile (default 640). The device node used is /etc/remote-tty/dev/<host>. This will normally be a symlink to the correct file in /dev. ttysrv is configured to log to /var/log/remote-tty/<host>/<host>, with a pidfile at /var/run/remote-tty/pid/<host> and the socket at /var/run/remote-tty/sock/<host>. SEE ALSO
remote-tty(1), ttysrv(8). AUTHOR
rtty was written by Paul Vixie <vixie@isc.org>. This manual page was written by Jonathan McDowell <noodles@earth.li> for the Debian project (but may be used by others). May 23, 2006 STARTSRV(8)
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