Package: dash Version: 0.5.11+git20200708+dd9ef66-5 Version: 0.5.12-2 Severity: normal
Dear Maintainer,
bullseye bash as well as bullseye, sid, and git dash observe the following:
$ cat -n boment
1 echo "$(head -n1 <<EOF)"
2 # 2
3 # 3
$ sh boment
$ sh -x boment
+ head -n1
+ echo
$
POSIX Issue 7, XCU, 2. Shell Command Language says
2.7.4 Here-Document
The redirection operators "<<" and "<<-" both allow redirection of subsequent
lines read by the shell to the input of a command. The redirected lines are
known as a "here-document".
The here-document shall be treated as a single word that begins after the
next <newline> and continues until there is a line containing only the
delimiter and a <newline>, with no <blank> characters in between. Then the next
here-document starts, if there is one. The format is as follows:
and its counterpart in Issue 8 Draft 3
80601 2.7.4 Here-Document
80602 The redirection operators "<<" and "<<-" both allow redirection of
subsequent lines read by
80603 the shell to the input of a command. The redirected lines are known as
a ``here-document’’.
80604 The here-document shall be treated as a single word that begins after
the next NEWLINE token
80605 and continues until there is a line containing only the delimiter and
a <newline>, with no
80606 <blank> characters in between. Then the next here-document starts, if
there is one. For the
80607 purposes of locating this terminating line, the end of a
command_string operand (see sh) shall be
80608 treated as a <newline> character, and the end of the commands string
in $(commands) and
80609 `commands` may be treated as a <newline>. If the end of input is
reached without finding the
80610 terminating line, the shell should, but need not, treat this as a
redirection error. The format is as
80611 follows:
That is, as I understand it:
echo "$(head -n1 <<EOF
abc
def
EOF
)"
and
echo "$(head -n1 <<EOF)"
abc
def
EOF
are always required to work and Issue 8 allows shells to have
echo "$(head -n1 <<EOF
abc
def
EOF)"
work as well.
Either way, this looks to me like a POSIX violation.
Best,
наб
-- System Information:
Debian Release: 12.0
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: x32 (x86_64)
Foreign Architectures: amd64, i386
Kernel: Linux 6.1.0-2-amd64 (SMP w/2 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages dash depends on:
ii debianutils 5.7-0.4
ii dpkg 1.21.22
ii libc6 2.36-9
dash recommends no packages.
dash suggests no packages.
-- debconf information:
* dash/sh: true
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Description: PGP signature
