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Full Discussion: NAWK Heeeeeeeeelllllllpppp Please
Top Forums Shell Programming and Scripting NAWK Heeeeeeeeelllllllpppp Please Post 10275 by TioTony on Sunday 11th of November 2001 08:36:13 PM
Old 11-11-2001
Hi Dianna,
I am not familiar with NAWK but I do know AWK which is pretty similar. awk has a variable called NF which tells you the number of fields in record based on your field separator. For example, if you have names in the following formats:

John Q. Public
Jane Doe
Bill Bob Joe Bob Johnson

the NF will be the following for each assuming your field separatore is a space (which is default by the way):

John Q. Public NF=3
Jane Doe NF=2
Bill Bob Joe Bob Johnson NF=4

You can then use the value of NF to determine which feild to extract permitted the last name is always the last "word" on the line. Here are some examples where this wouldn't work:

Thuston Howell III <- last name is not III
Tony Van Sant <- last name is two "words"

If you are new to shell programming, a great book about awk is "sed and awk" by O'Reilly:

http://www.oreilly.com/catalog/sed2/

Good Luck,
TioTony
 

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LEARN ABOUT SUSE

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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