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Top Forums Programming Open Source Splitting files using awk and reading filename value from input data Post 302976260 by rbatte1 on Monday 27th of June 2016 06:45:48 AM
Old 06-27-2016
A compromise perhaps bolting several things together.

From the suggestions given and further digging, I've ended up with:-
Code:
awk "/Active transaction started/ && /${userregex}/ {print \$1, \$2, \$3 \$11 \
> \"/tmp/logs/splitlog.\"gensub(/[^[:alnum:]._-]/, \"\", \"g\", \$11)}" /var/log/qapplog

for userfile in /tmp/logs/splitlog.*
do
   lastrecord=$(tail -1 $userfile)
   printf "User %s last record is %s\n" "$userfile" "$lastrecord"
   .... whatever else here ....
done

To explain it a bit more:-
  • The ${userregex} is a regular expression for all the users we are interested in, so we can exclude testing messages which sadly get written to the same log.

  • The text output is just for checking we've got it, there would be further processing (and that's all fine) This is finding a way to get the last logged entry for each user, so the printf line is just for debug.

  • We removed the grep with the two expressions (both must be satisfied) see this thread

  • The output file(s) are redirected to /tmp/logs/splitlog. appended by the output from the gensub on field 11. The gensub removes all characters from field 11 that are not matched by being alphanumeric, full-stop (period for American English), underscore or hyphen, those all being acceptable characters to build a filename from and sensibly allowed in user account names. We could possibly have apostrophes too, but these have been excluded.

It seems to work for me in testing, but I'd appreciate another few sets of eyes to validate I'm not doing something daft and leaving a gaping hole somewhere.


Robin
 

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cal(1)							      General Commands Manual							    cal(1)

NAME
cal - print calendar SYNOPSIS
[[month] year] DESCRIPTION
prints a calendar for the specified year. If a month is also specified, a calendar just for that month is printed. If neither is speci- fied, a calendar for the present month is printed. year can be between 1 and 9999. month is a decimal number between 1 and 12. The cal- endar produced is a Gregorian calendar. EXTERNAL INFLUENCES
For information about the UNIX Standard environment, see standards(5). Environment Variables determines the locale to use for the locale categories when both and the corresponding environment variable (beginning with do not specify a locale. If is not set or is set to the empty string, a default of "C" (see lang(5)) is used. determines the locale for interpretation of sequences of bytes of text data as characters (e.g., single- verses multibyte characters in arguments and input files). determines the format and contents of the calendar. determines the timezone used to calculate the value of the current month. If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See environ(5). International Code Set Support Single- and multi-byte character code sets are supported. EXAMPLES
The command: prints the calendar for September, 1850 on the screen as follows: However, for UNIX Standard (see standards(5)), the output looks like below: WARNINGS
The year is always considered to start in January even though this is historically naive. Beware that refers to the early Christian era, not the 20th century. SEE ALSO
standards(5). STANDARDS CONFORMANCE
cal(1)
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