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-pc-linux-gnu' -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H -I. -I../. -I.././include -I.././lib -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/build/bash-7fckc0/bash-4.4=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -no-pie -Wno-parentheses -Wno-format-security uname output: Linux thegibson 4.12.0-1-amd64 #1 SMP Debian 4.12.6-1 (2017-08-12) x86_64 GNU/Linux Machine Type: x86_64-pc-linux-gnu
Bash Version: 4.4
Patch Level: 12
Release Status: release
Description:
an octal/hex value of ctrl-a (\001) expanded by a quoted string
expansion appears to expand twice when in a process substitution.
Repeat-By:
>(echo -n $'\001' | wc -c)
outputs 2 (ignoring the permission denied error)
echo -n $'\001' | wc -c
outputs 1
eval "$(for i in {01..77}; do (( 10#$i % 10 > 7 )) && continue; echo^M
'>(echo -n $'"'\0$i'"' >>test)'; done)"
using `xxd test` you can see there are only repeating \001's
00000000: 0101 0203 0405 0607 0809 0a0b 0c0d 0e0f ................
...etc
no process substitution
eval "$(for i in {01..77}; do (( 10#$i % 10 > 7 )) && continue; echo
'echo -n $'"'\0$i'"' >>test2'; done)"
`xxd test2`
00000000: 0102 0304 0506 0708 090a 0b0c 0d0e 0f10 ................
...etc
signature.asc
Description: OpenPGP digital signature
