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Diffstat (limited to 'README')
| -rw-r--r-- | README | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/README b/README index 84a00706f..816c0819e 100644 --- a/README +++ b/README @@ -26,6 +26,17 @@ Possible incompatibilities Since 4.2: +The option SH_WORD_SPLIT, used in Bourne/Korn/Posix shell compatibility +mode, has been made more like other shells in the case of substitutions of +the form ${1+"$@"} (a common trick used to work around problems in older +Bourne shells) or any of the related forms with the + replaced by - or = +with an optional colon following. Previously, with SH_WORD_SPLIT in +effect, this expression would cause splitting on all white space in the +shell arguments. (This was always regarded as a bug but was long-standing +behaviour.) Now it is treated identically to "$@". The same change +applies to expressions with forced splitting such as ${=1+"$@"}, but +otherwise the case where SH_WORD_SPLIT is not set is unaffected. + The "unset" builtin now does not regard the unsetting of non-existent variables as an error, so can still return status 0 (depending on the handling of other arguments). This appears to be the standard shell |