table of contents
MSED(1) | General Commands Manual | MSED(1) |
NAME¶
msed
—
SYNOPSIS¶
msed |
script [msgs ...] |
DESCRIPTION¶
msed
prints the messages msgs with
message headers transformed by the commands in script.
(See mmsg(7) for the message argument syntax.) If no
msgs are passed, msed
will
default to the current message.
msed
scripts are akin to a subset of
sed(1) scripts, but optimized for modifying messages. Note
that msed
unfolds and normalizes message headers, so
they may need to be passed through mmime(7) to ensure RFC
5322 conformance. The message body is not affected.
msed
supports the following commands. The
separators after the command letter may be substituted
with an arbitrary symbol, just as in sed(1). Multiple
commands can be separated by ‘;
’.
/
header/
a
/
value/
- If the header
‘header
:
’ is not set in the message, add it with the given value. /
headers/
c
/
value/
- Change colon-separated headers matching the regular expression headers, with implicit anchoring to the header name, to the value given in value.
/
headers/
d
- Delete colon-separated headers matching the regular expression
headers, with implicit anchoring to the header name.
Use explicit ‘
.*
’ to match arbitrary strings at the beginning or end of the headers.For example, ‘
/x-.*/d
’ will delete all headers starting with ‘X-
’ (always case insensitive), and ‘/from:to:cc/d
’ will delete the headers ‘From:
’, ‘To:
’, and ‘Cc:
’. - [
/
headers/
]s
/
regex/
replacement/
[flags] - Substitute matches of the POSIX Basic Regular Expression
regex in headers matching the POSIX Basic Regular
Expression headers, with implicit anchoring to the
header name (or all headers, if omitted), with the string
replacement, expanding
‘
&
’ to the matched string, and ‘\
N’ to the Nth sub-expression, where N is between 1 and 9.If flags contains the letter ‘
d
’, the header is removed if regex matched.By default, only the first match is replaced, unless flags contains the letter ‘
g
’.By default, regex is matched case sensitively, unless flags contains the letter ‘
i
’.
EXIT STATUS¶
Themsed
utility exits 0 on success,
and >0 if an error occurs.
SEE ALSO¶
sed(1), mhdr(1), mmsg(7), regex(7) / re_format(7)AUTHORS¶
Leah Neukirchen <leah@vuxu.org>LICENSE¶
msed
is in the public domain.
To the extent possible under law, the creator of this work has waived all copyright and related or neighboring rights to this work.
August 1, 2016 | Linux 4.19.0-10-amd64 |