suckless unix tools
git clone
Log | Files | Refs | README | LICENSE

commit c225d88d49f5cfd3c6e562700131cc7006d6d57a
parent ed78aef5b180cf1d82f03e8ae43c62317f273962
Author: Michael Forney <>
Date:   Sun,  3 Sep 2017 15:39:47 -0700

getconf: Report invalid variables as errors

Printing `undefined` to stdout means that the variable is valid but not
set. Instead, report an error in this case.

linux 4.13 appends the result of `getconf LFS_CFLAGS` to HOSTCFLAGS,
even if it prints `undefined`. This is arguably a bug in the Makefile,
but even so, getconf shouldn't report that unsupported variables are

Mgetconf.1 | 4++--
Mgetconf.c | 4+---
2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/getconf.1 b/getconf.1 @@ -32,7 +32,7 @@ and limits.h (Minimum and Maximum). .sp If .Ar var -is not defined or has not been found, +is not defined, .Nm writes "undefined" to stdout. .Sh OPTIONS @@ -48,7 +48,7 @@ was matched and its value written successfully. .It 1 An error occured or .Ar var -was neither defined nor found. +was invalid. .El .Sh STANDARDS The diff --git a/getconf.c b/getconf.c @@ -102,7 +102,5 @@ main(int argc, char *argv[]) usage(); } - puts("undefined"); - - return 1; + eprintf("invalid variable: %s\n", argv[0]); }