Yeah. I noted that as workaround in the report... I figured if posix was vague on this matching other shells might be better behavior. On Jun 28, 2015 2:57 PM, "Dennis Williamson" <dennistwilliam...@gmail.com> wrote:
> > > On Sat, Jun 27, 2015 at 2:48 PM, Nathan Neulinger <nn...@neulinger.org> > wrote: > >> Configuration Information [Automatically generated, do not change]: >> Machine: x86_64 >> OS: linux-gnu >> Compiler: gcc >> Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' >> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-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 >> -DRECYCLES_PIDS -DDEFAULT_PATH_VALUE='/usr/local/bin:/usr/bin' -O2 -g >> -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions >> -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches >> -m64 -mtune=generic >> uname output: Linux skyhawk.home.neulinger.org 3.19.3-200.fc21.x86_64 #1 >> SMP Thu Mar 26 21:39:42 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux >> Machine Type: x86_64-redhat-linux-gnu >> >> Bash Version: 4.3 >> Patch Level: 39 >> Release Status: release >> >> Description: >> >> If $() includes a case statement nested within it, the parser is >> not matching ) as closing the case, >> but rather the $(. This behavior is different between bash and >> other shells. ksh/busybox >> both process this without error, but I do not know which is >> officially "correct". >> >> Test Case: >> --------------- >> testing=$( >> echo test | while read line; do >> case $line in >> test) echo saw test ;; >> *) echo other ;; >> esac >> done >> ) >> >> echo result: $testing >> -------------- >> >> Expected output: >> >> result: saw test >> >> Actual output: >> >> parse-bug.sh: line 6: syntax error near unexpected token `;;' >> parse-bug.sh: line 6: ` test) echo saw test ;;' >> >> >> Workaround: Use (test) instead of test) in the nested code >> >> >> Repeat-By: >> Run script with that syntax. >> >> >> >> -- >> ------------------------------------------------------------ >> Nathan Neulinger nn...@neulinger.org >> Neulinger Consulting (573) 612-1412 >> >> > > You can use the full syntax of case by surrounding the cases with both > opening and closing parentheses: > > testing=$( > echo test | while read line; do > case $line in > (test) echo saw test ;; > (*) echo other ;; > esac > done > ) > > POSIX shows the opening parentheses as optional, but does not describe > their use or when they might be necessary. > > > http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_09_04 > > -- > Visit serverfault.com to get your system administration questions > answered. >
