Use a '!' character to start a non-matching pattern bracket expression, as specified by POSIX in Shell Command Language section 2.13.1 Patterns Matching a Single Character [1]. I used '^' instead in three places in the previous three commits, to verify that the arguments of the '--stress=' and '--stress-limit=' options and the values of various '*_PORT' environment variables are valid numbers. With certain shells, at least with dash (upstream and in Ubuntu 14.04) and mksh, this led to various undesired behaviors: # error message in case of a valid number $ ~/src/dash/src/dash ./t3903-stash.sh --stress=8 error: --stress=<N> requires the number of jobs to run # not the expected error message $ ~/src/dash/src/dash ./t3903-stash.sh --stress=foo ./t3903-stash.sh: 238: test: Illegal number: foo # no error message at all?! $ mksh ./t3903-stash.sh --stress=foo $ echo $? 0 Some other shells, e.g. Bash (even in posix mode), ksh, dash in Ubuntu 16.04 or later, are apparently happy to accept '^' just as well. [1] http://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_13 Signed-off-by: SZEDER Gábor <szeder.dev@xxxxxxxxx> --- Should go on top of 'sg/stress-test'. t/test-lib-functions.sh | 2 +- t/test-lib.sh | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh index 92cf8f812c..969e2ba6da 100644 --- a/t/test-lib-functions.sh +++ b/t/test-lib-functions.sh @@ -1289,7 +1289,7 @@ test_set_port () { port=$(($port + 10000)) fi ;; - *[^0-9]*|0*) + *[!0-9]*|0*) error >&7 "invalid port number: $port" ;; *) diff --git a/t/test-lib.sh b/t/test-lib.sh index 77eff04c92..4e7cb52b57 100644 --- a/t/test-lib.sh +++ b/t/test-lib.sh @@ -144,7 +144,7 @@ do --stress=*) stress=${opt#--*=} case "$stress" in - *[^0-9]*|0*|"") + *[!0-9]*|0*|"") echo "error: --stress=<N> requires the number of jobs to run" >&2 exit 1 ;; @@ -155,7 +155,7 @@ do --stress-limit=*) stress_limit=${opt#--*=} case "$stress_limit" in - *[^0-9]*|0*|"") + *[!0-9]*|0*|"") echo "error: --stress-limit=<N> requires the number of repetitions" >&2 exit 1 ;; -- 2.21.0.rc0.405.g6226d63c89
