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Full Discussion: How to auto correct a failing command?
Top Forums Shell Programming and Scripting How to auto correct a failing command? Post 302989907 by mohtashims on Thursday 19th of January 2017 04:39:29 PM
Old 01-19-2017
Hammer & Screwdriver How to auto correct a failing command?
If a command is not found, e.g. nawk, this is how I fix the problem
Code:
[[ -x /usr/bin/gawk ]] && NAWK=/usr/bin/gawk  
[[ -x /usr/bin/nawk ]] && NAWK=/usr/bin/nawk  
[[ -x /usr/bin/awk ]] && NAWK=/usr/bin/awk

I use $NAWK an the set the appropriate value based on the system it runs.

How can I implement a similar fix for a command found but illegal argument. See pseudo example below.

Code:
grep -o hello *
grep: invalid option -- o

Last edited by rbatte1; 01-20-2017 at 06:53 AM.. Reason: Grammar
 

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LEARN ABOUT HPUX

ucblinks

ucblinks(1B)					     SunOS/BSD Compatibility Package Commands					      ucblinks(1B)

NAME

       ucblinks - adds /dev entries to give SunOS 4.x compatible names to SunOS 5.x devices

SYNOPSIS

       /usr/ucb/ucblinks [-e rulebase] [-r rootdir]

DESCRIPTION

       ucblinks  creates symbolic links under the /dev directory for devices whose SunOS 5.x names differ from their SunOS 4.x names. Where possi-
       ble, these symbolic links point to the device's SunOS 5.x name rather than to the actual /devices entry.

       ucblinks does not remove unneeded compatibility links; these must be removed by hand.

       ucblinks should be called each time the system is reconfiguration-booted, after any new SunOS 5.x links that are needed have been  created,
       since the reconfiguration may have resulted in more compatibility names being needed.

       In  releases prior to SunOS 5.4, ucblinks used a  nawk rule-base to construct the SunOS 4.x compatible names. ucblinks no longer uses  nawk
       for the default operation, although  nawk rule-bases can still be specifed with the -e option.  The  nawk rule-base equivalent to the SunOS
       5.4 default operation can be found in /usr/ucblib/ucblinks.awk.

OPTIONS

       -e rulebase     Specify rulebase as the file containing nawk(1) pattern-action statements.

       -r rootdir      Specify rootdir as the directory under which dev and devices will be found, rather than the standard root directory /.

FILES

       /usr/ucblib/ucblinks.awk        sample rule-base for compatibility links

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       devlinks(1M), disks(1M), ports(1M), tapes(1M), attributes(5)

SunOS 5.10							    13 Apr 1994 						      ucblinks(1B)
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