Continued ...
Also, on a Linux host that has ksh 93u+ 2012-08-01 and was not upgraded, here
is a cooked-up example of code that works as expected:
$ x='Occurrences of the token "APOLLO_SERVER" in the "common.properties" files
and other "*.properties" files for "15I" "BCOM"'
$ y="${x//\"*([!\"])\"/\"A-${.sh.match[1]}-Z\"}"
$ print -r "$y"
Occurrences of the token "A-APOLLO_SERVER-Z" in the "A-common.properties-Z"
files and other "A-*.properties-Z" files for "A-15I-Z" "A-BCOM-Z"
However, on the Linux host that was upgraded to 93u+ 2012-08-01, the result of
my first execution of the above code is:
Occurrences of the token "A--Z" in the "A--Z" files and other "A--Z" files for
"A--Z" "A--Z"
If I run the code a second time, I get a slightly different, but still
incorrect result:
Occurrences of the token "A-APOLLO_SERVER-Z" in the "A-APOLLO_SERVER-Z" files
and other "A-APOLLO_SERVER-Z" files for "A-APOLLO_SERVER-Z" "A-APOLLO_SERVER-Z"
Please help.
Thanks,
Dan
----- Original Message -----
From: "Dan Rickhoff" <[email protected]>
To: [email protected]
Sent: Sunday, September 6, 2015 8:49:56 AM
Subject: [ast-users] After upgrading ksh, the second backlash in
“${myVar/\</\>}" is no longer considered as an "escape" character.
AST Users,
After upgrading ksh, the second backlash in “${myVar/\</\>}" is no longer
considered as an "escape" character.
At my request, our Sys Admin upgraded ksh on one of our Linux servers. In the
code example below, I escaped the "<“ and “>” characters, as I have in other
code that has worked for years. Now, the output of the example statement
includes an unexpected “\” character. Is the new behavior wrong? Or have I
always been doing the wrong thing by escaping (in this example) the “>”
character? If escaping special characters in the “change-to” part was
incorrect, why has my other code that escapes special characters in the
“change-to” part never before printed out those “\” characters?
#================================
#-- Red Hat Enterprise Linux Server release 6.4 (Santiago)
#-- ksh version sh (AT&T Research) 93u+ 2012-08-01
#— "rpm -qa" reports: ksh-20120801-21.el6_6.2.x86_64
#--
#— UPGRADED FROM:
#— ksh version sh (AT&T Research) 93t+ 2010-06-21
#— "rpm -qa" reports: ksh-20100621-19.el6_4.4.x86_64
#—
$ myVar=“x<y"
$ print “${myVar/\</\>}"
x\>y
#—
#— Previously, the printed value would have been: x>y
#================================
Thanks,
Dan Rickhoff
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