@cks

This is a perennial stupidity in the C and C++ worlds.

Because the C and C++ standards leave some things up to _other_ standards, including (ironically) #POSIX, the idea that one shouldn't talk about them in the comp.std.c and comp.std.c++ newsgroups mutated into a stupid dogma that C and C++ programs shouldn't rely upon anything from these other standards.

#fgrep and #egrep are in the SVID. (-:

#GNU #grep #Unix

@penguin42 @cks

That's the thing. The GNU egrep and fgrep _already are_ shell scripts. Paul Eggert added this change _to those shell scripts_.

https://debbugs.gnu.org/cgi/bugreport.cgi?msg=17;att=1;bug=49996;filename=0001-egrep-fgrep-now-obsolete.patch

#GNU #grep #egrep #fgrep

@cks

You're a bit late. Debian had a bug about this, and patched the warnings out, back in 2022.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1019335

The Debian bug log also points to the two GNU project bug reports, where Paul Eggert et al. argued against undoing the new behaviour.

#GNU #grep #fgrep #egrep

#egrep

Count words with two or more characters by ending character:

for i in {a..z} ; do printf "$i " ; look . | egrep ".$i$" | wc -l ; done | sort -k2nr

#egrep

Frequency count of ending letters in words of 2 or more characters:

for i in {a..z} ; do printf "$i " ; look . | egrep ".$i$" | wc -l ; done | sort -k2nr

Learn about alternative tools to deprecated #Linux commands https://www.fosslife.org/alternatives-deprecated-linux-commands #tools #CommandLine #security #commands #egrep #fgrep #nslookup #ifconfig #netstat #route #flags #ip