On 02/16/2011 08:13 PM, Chet Ramey wrote: > On 2/13/11 3:17 PM, ste...@syslang.net wrote: >> Configuration Information [Automatically generated, do not change]: >> Machine: i386 >> OS: linux-gnu >> Compiler: gcc >> Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i386' >> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i386-redhat-linux-gnu' >> -DCONF_VENDOR='redhat' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' >> -DSHELL -DHAVE_CONFIG_H -I. -I. -I./include -I./lib -D_GNU_SOURCE >> -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -g -pipe -Wall >> -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector >> --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic >> -fasynchronous-unwind-tables >> uname output: Linux saturn.syslang.net 2.6.27.41-170.2.117.fc10.i686.PAE #1 >> SMP Thu Dec 10 10:48:30 EST 2009 i686 athlon i386 GNU/Linux >> Machine Type: i386-redhat-linux-gnu >> >> Bash Version: 3.2 >> Patch Level: 39 >> Release Status: release >> >> Description: >> First, I already submitted this bug from work, but I didn't >> realize that the address I sent from would not be allowed to receive >> a response. This address will work fine. >> >> If I declare a variable at the top scope using -r, it will prevent me >> from declaring a local copy in a subroutine. This problem happens in >> this version of bash as well as in bash4 under Fedora 14. > > This is intentional. A variable is declared readonly for a reason, and > readonly variables may not be assigned to. I don't believe that you > should be able to use a function to circumvent this.
Consensus on today's Austin Group meeting was that since we are interested in standardizing local variables (or at least a subset of the 'typeset' special built-in's capabilities), this needs to be uniform across implementations. The Austin Group would favor the ability to create a local read-write variable that shadows a global read-only variable, which would entail a change to this bash behavior. [Which reminds me - I still have the action item to propose wording for getting typeset into the next revision of POSIX] -- Eric Blake ebl...@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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