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Full Discussion: Extract n-digits from string in perl
Top Forums Shell Programming and Scripting Extract n-digits from string in perl Post 303003080 by james2009 on Thursday 7th of September 2017 11:43:23 AM
Old 09-07-2017
Quote:
Originally Posted by rbatte1
I would suggest using split being saved to an array, then display the appropriate field. Perhaps something like this might help:-
Code:
  my $line = "01/05/2017 10:23:41 [ABCD-22357$0]: file.log.38: database error, MODE=SINGLE, LEVEL=critical, STATE: 01170255 (mode main" ;

  my @tmp_array = split (/ /,$line) ;
  print $tmp_array[9] ;


Does that help?
Robin
Thanks Robin, but i'm looking at a situation where the 8-digit number can appear in another position in the string. In that case it will not always be the 9th element of the array.

---------- Post updated at 10:43 AM ---------- Previous update was at 10:28 AM ----------

Quote:
Originally Posted by durden_tyler
If the 8-digit number is always preceded by the word "STATE:" then you could use regular expressions as well:

Code:
$
$ cat mylog.txt
01/05/2017 10:23:41 [ABCD-22357$0]: file.log.38: database error, MODE=SINGLE, LEVEL=critical, STATE: 01170255 (mode main
$
$ perl -lne 'print $1 if /STATE:\s+(\d+)/' mylog.txt
01170255
$

If it could be preceded by more than word, then specify them all in your regular expression, like so:

Code:
$
$ cat mylog_1.txt
01/05/2017 10:23:41 [ABCD-22357$0]: file.log.38: database error, MODE=SINGLE, LEVEL=critical, STATE: 01170255 (mode main
something else
over here
01/05/2017 10:23:41 [ABCD-22357$0]: file.log.38: database error, MODE=SINGLE, LEVEL=critical, BLAH: 12345678 (mode main
some other stuff
$
$ perl -lne 'print $2 if /(STATE|BLAH):\s+(\d+)/' mylog_1.txt
01170255
12345678
$

How can i do this inside a perl script and not on the command line?
 

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LEARN ABOUT DEBIAN

seivots-summary

SEIVOTS-SUMMARY(1)					      General Commands Manual						SEIVOTS-SUMMARY(1)

NAME

       seivots-summary - summarize seivot output files

SYNOPSIS

       seivots-summary	[--config=FILE]  [--dump-config]  [--dump-memory-profile=METHOD] [--dump-setting-names] [--generate-manpage=TEMPLATE] [-h]
       [--help] [--list-config-files] [--log=FILE] [--log-keep=N] [--log-level=LEVEL]  [--log-max=SIZE]  [--log-mode=MODE]  [--no-default-configs]
       [--output=FILE] [--version] [FILE]...

DESCRIPTION

       seivots-summary	reads some benchmark result files created by summain(1), and produces summaries of them in tabular form, making it easy to
       compare results from different benchmark runs.

OPTIONS

       --config=FILE
	      add FILE to config files

       --dump-config
	      write out the entire current configuration

       --dump-memory-profile=METHOD
	      make memory profiling dumps using METHOD, which is one of: none, simple, meliae, or heapy (default: simple)

       --dump-setting-names
	      write out all names of settings and quit

       --generate-manpage=TEMPLATE
	      fill in manual page TEMPLATE

       -h, --help
	      show this help message and exit

       --list-config-files
	      list all possible config files

       --log=FILE
	      write log entries to FILE (default is to not write log files at all); use "syslog" to log to system log, or "none" to  disable  log-
	      ging

       --log-keep=N
	      keep last N logs (10)

       --log-level=LEVEL
	      log at LEVEL, one of debug, info, warning, error, critical, fatal (default: debug)

       --log-max=SIZE
	      rotate logs larger than SIZE, zero for never (default: 0)

       --log-mode=MODE
	      set permissions of new log files to MODE (octal; default 0600)

       --no-default-configs
	      clear list of configuration files to read

       --output=FILE
	      write output to FILE, instead of standard output

       --version
	      show program's version number and exit

EXAMPLE

       To summarize all benchmark files:

	      seivots-summary $HOME/obnam/benchmarks/*/*.seivot | less -S

SEE ALSO

       seivot(1), obnam(1).

																SEIVOTS-SUMMARY(1)
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