Shell Programming and Scripting

Try with

Code:

/usr/xpg4/bin/egrep

try this

Code:

/usr/xpg4/bin/grep -E 'May 29 15:([01][0-9]|[2][0-3]):[0-9]'

Try:

Code:

/usr/xpg4/bin/grep -E '^May 29 15:([01]|2[0-3])' /var/adm/messages

/usr/xpg4/bin/grep -E 'May 29 15:[0-9]{2}:[0-9]{2}' /var/adm/messages

works

but why not egrep 'May 29 15:[0-9]{2}:[0-9]{2}' /var/adm/messages ???

Please if some one has some details one the regex compatibility table with unix tools ( e.g. grep , grep , sed , awk , nawk and so ) that would be much helpful

There is no data between 15:00:00 and 15:23:59 on May 29 in that file..

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use /usr/xpg4/bin/grep -E or /usr/xpg4/bin/egrep on Solaris

you are right!!

sorry scurtinizer and ygemici , just now tried your codes on another file and voila!! it worked

SUNWcsu is a core solaris package and grep an egrep and the others (/usr/bin/..) packages belong to that.

SUNWxcu4 utilities are like an enchanced the core utilities with XCU4(i m not sure but is is extendend core utilities) specifications..
These commands are an XPG4(X/Open Portability Guide) superset of Posix standarts from previous superset (XPG3)..
These packages are improved by the X/Open Company, Ltd and adapted to Sun (Sparc and x86 for Sun) platforms by the Oracle (Sun Microsystems ).
so the other name is X/Open Commands & Utilities..
and XCU4 utulities are placed in the "/usr/xpg4/bin" folder for prevent the conflicts with existing Solaris behavior and these are suitable the POSIX.2 standarts.