Things I Wish I'd Known About Bash

Re:Things I Wish I'd Known About Bash by kinkrtyavimoodh on Saturday January 06, 2018 @03:02PM (#16087134)

I agree. And I agree with your bash 'whitelist'. I'd also add a hard blacklist for any serious string manipulation. A series of awks and seds look clever but they are quite annoying to deal with.

If it's just a bunch of cuts or tr, sure.

[ Parent | on HN ]

Re:Things I Wish I'd Known About Bash by DonHopkins on Saturday January 06, 2018 @05:30PM (#16087838)

And it's SO MUCH MORE expensive to fork all those processes. Just use a real language, please.

[ Parent | on HN ]

Re:Things I Wish I'd Known About Bash by aplorbust on Sunday January 07, 2018 @12:02PM (#16091509)

"A series of awks and seds look clever but they are annoying to deal with."

Would the following be annoying for you to deal with?

   #!/bin/sh
   sed 's/#.*//' \
   | sed 's/:/#/g' \
   | cat AMD64 - \
   | ./qhasm-ops \
   | ./qhasm-regs \
   | ./qhasm-fp \
   | ./qhasm-as \
   | sed 's/%32/d/g' \
   | sed 's/%raxd/%eax/g' \
   | sed 's/%rbxd/%ebx/g' \
   | sed 's/%rcxd/%ecx/g' \
   | sed 's/%rdxd/%edx/g' \
   | sed 's/%rsid/%esi/g' \
   | sed 's/%rdid/%edi/g' \
   | sed 's/%rbpd/%ebp/g'

where qhasm-as and qhasm-fp are each awk scripts (222 and 427 lines, respectively).

source: http://cr.yp.to/qhasm/qhasm-20061116.tar.gz qhasm-20061116/qhasm-amd64

[ Parent | on HN ]