diff options
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | README | 4 | ||||
| -rw-r--r-- | Src/exec.c | 10 | ||||
| -rw-r--r-- | Test/B07emulate.ztst | 22 |
4 files changed, 36 insertions, 4 deletions
@@ -5,6 +5,10 @@ 2021-04-10 dana <dana@dana.is> + * brian m. carlson: 47794: README, Src/exec.c, + Test/B07emulate.ztst: exec: run final pipeline command in a + subshell in sh mode + * unposted (see 48415): README: Document incompatibility caused by workers/43928 @@ -95,6 +95,10 @@ right thing, but this should be viewed as an unsupported hack.) The XTRACE option is now disabled while running user-defined completion widgets. See NEWS. +emulate sh: When zsh emulates sh, the final command in a pipeline is now run in +a subshell. This differs from the behavior in the native (zsh) mode, but is +consistent with most other sh implementations. + Incompatibilities between 5.7.1 and 5.8 --------------------------------------- diff --git a/Src/exec.c b/Src/exec.c index 2301f85ad..6f09e0d9f 100644 --- a/Src/exec.c +++ b/Src/exec.c @@ -2901,11 +2901,13 @@ execcmd_exec(Estate state, Execcmd_params eparams, pushnode(args, dupstring("fg")); } - if ((how & Z_ASYNC) || output) { + if ((how & Z_ASYNC) || output || + (last1 == 2 && input && EMULATION(EMULATE_SH))) { /* - * If running in the background, or not the last command in a - * pipeline, we don't need any of the rest of this function to - * affect the state in the main shell, so fork immediately. + * If running in the background, not the last command in a + * pipeline, or the last command in a multi-stage pipeline + * in sh mode, we don't need any of the rest of this function + * to affect the state in the main shell, so fork immediately. * * In other cases we may need to process the command line * a bit further before we make the decision. diff --git a/Test/B07emulate.ztst b/Test/B07emulate.ztst index 7b1592fa9..45c39b51d 100644 --- a/Test/B07emulate.ztst +++ b/Test/B07emulate.ztst @@ -276,3 +276,25 @@ F:Some reserved tokens are handled in alias expansion 0:--emulate followed by other options >yes >no + + emulate sh -c ' + foo () { + VAR=foo && + echo $VAR | bar && + echo "$VAR" + } + bar () { + tr f b && + VAR="$(echo bar | tr r z)" && + echo "$VAR" + } + foo + ' + emulate sh -c 'func() { echo | local def="abc"; echo $def;}; func' + emulate sh -c 'abc="def"; echo | abc="ghi"; echo $abc' +0:emulate sh uses subshell for last pipe entry +>boo +>baz +>foo +> +>def |