standards/181240: /bin/sh choking on a certain construct

Tamas TEVESZ ice at
Mon Aug 12 14:00:01 UTC 2013

>Number:         181240
>Category:       standards
>Synopsis:       /bin/sh choking on a certain construct
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-standards
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Aug 12 14:00:00 UTC 2013
>Originator:     Tamas TEVESZ
>Release:        9.1
FreeBSD localhost.localdomain 9.1-RELEASE-p5 FreeBSD 9.1-RELEASE-p5 #13 r253984: Wed Aug  7 03:49:56 CEST 2013     root at localhost.localdomain:/usr/obj/usr/src/sys/DTRACE  amd64
$ /bin/sh -c 'echo foo || >&2 | cat'
Syntax error: "|" unexpected

This snippet is run finely by every Bourne-ish shell I could manage to check (pdksh, busybox ash, dash, Solaris' /usr/xpg4/bin/sh, HPUX's sh, even ports/v7sh). Because of this, I'm categorizing this as a standards bug (even though I haven't checked POSIX or SuS), feel free to re-categorize.

/bin/sh -c 'echo foo || >&2 | cat'

(Or, if you have misc/mc installed, hit ^[3 on a .diff/.patch/.so etc. file for which mc calls /usr/local/libexec/mc/ext.d/


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