From 88e0d39a46b2f9c43fa48fda50da09607f6a9d9b Mon Sep 17 00:00:00 2001 From: Zack Weinberg Date: Wed, 26 Aug 2020 15:08:26 -0400 Subject: [PATCH] Add NetBSD /bin/sh to the -n whitelist. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit NetBSD’s /bin/sh sets a special variable “NETBSD_SHELL” to identify itself. This means we can whitelist it as not having a buggy -n implementation. * configure.ac: Assume -n mode works in shells that have a preset variable named NETBSD_SHELL. --- configure.ac | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/configure.ac b/configure.ac index 38a8ff951..56d275491 100644 --- a/configure.ac +++ b/configure.ac @@ -64,7 +64,7 @@ AC_CACHE_CHECK([for a shell whose -n mode is known to work], # follow with a hardwired list of shells that are known to work and can # be identified as such, starting with the ones with the fewest # syntactic extensions. Unfortunately, several shells that are also -# known to work can't be easily identified (e.g. BSD sh, dash). +# known to work can't be easily identified (e.g. some BSD shells and dash). # Try ksh93, which is often buggy, and plain ksh and sh last. for cand_sh in "$SHELL" pdksh bash zsh ksh93 ksh sh do @@ -72,8 +72,9 @@ do unset BASH_VERSION ZSH_VERSION "$cand_sh" -c ' test ${BASH_VERSION+y} || # Bash - test ${KSH_VERSION+y} || # pdksh - test ${ZSH_VERSION+y} || # zsh + test ${KSH_VERSION+y} || # pdksh + test ${ZSH_VERSION+y} || # zsh + test ${NETBSD_SHELL+y} || # NetBSD sh test -n "${.sh.version}" # ksh93; put this last since its syntax is dodgy ' ) 2>/dev/null -- 2.47.3