From: steffen@sdaoden.eu (Steffen Nurpmeso)
Subject: [TUHS] basic tools / Universal Unix
Date: Thu, 19 Oct 2017 16:32:06 +0200 [thread overview]
Message-ID: <20171019143206.PuxV4%steffen@sdaoden.eu> (raw)
In-Reply-To: <201710182303.v9IN35Bv030527@coolidge.cs.Dartmouth.EDU>
Doug McIlroy <doug at cs.dartmouth.edu> wrote:
|> sed *n l pathname
|>
|> The latter also has the advantage that its output is
|
|> unambiguous, whereas the output of historical cat *etv is not.
|>
|> But mind you, in preparation of this email i found a bug in
|> Busybox sed(1) which simply echoes nothing for the above.
|
|I assume that * is a typo for - . If so, sed did just what
|-n tells it to--no printing except as called for by p or P.
It seems to be a problem of (the PDF to text conversion and) the
musl C library environment used on this box:
?0[steffen at essex tmp]$ echo *e | s-hex
00000000 e2 88 92 65 0a |...e.|
00000005
?0[steffen at essex tmp]$ echo *e | iconv -f utf8 -t ascii
*e
?0[steffen at essex tmp]$ command -v iconv
/usr/bin/iconv
?0[steffen at essex tmp]$ apk info --who-owns /usr/bin/iconv
/usr/bin/iconv is owned by musl-utils-1.1.16-r22
And of course because of mailx's "set reply-in-same-charset"
ending up using US-ASCII.
|And speaking of sed anticipating other tools, the inclusion
|of "head" in v7 as a complement to "tail" was a close call
|because head is subsumed by sed q.
The difference being that these can be implemented as shell script
wrappers around (modern) sed easily, whereas the -vet thing would
require painful awk scripting, by reading bytewise and string
comparing each of those bytes against a sprintf("%c",0.255) and
a tree of if conditions, without having tried it.
And then head and tail are self-describing, whereas -vet as
a modifier for file content c(onc)atenation i never had problems
with, but looking for that feature in a stream editor is more
obvious for the unaware.
|Doug
Ju-hu!
--steffen
|
|Der Kragenbaer, The moon bear,
|der holt sich munter he cheerfully and one by one
|einen nach dem anderen runter wa.ks himself off
|(By Robert Gernhardt)
next prev parent reply other threads:[~2017-10-19 14:32 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-18 23:03 Doug McIlroy
2017-10-19 3:53 ` Random832
2017-10-19 14:33 ` Steffen Nurpmeso
2017-10-19 14:41 ` Random832
2017-10-19 21:03 ` Steffen Nurpmeso
2017-10-20 19:54 ` Steffen Nurpmeso
2017-10-19 14:32 ` Steffen Nurpmeso [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-11-15 14:06 Noel Chiappa
2017-11-15 17:12 ` Ralph Corderoy
2017-11-15 17:47 ` Larry McVoy
2017-11-15 18:40 ` Bakul Shah
2017-11-15 19:58 ` Larry McVoy
2017-11-01 22:51 Norman Wilson
2017-11-01 23:09 ` Lyndon Nerenberg
2017-11-02 20:29 ` Grant Taylor
2017-10-31 19:23 Norman Wilson
2017-10-30 21:40 Noel Chiappa
2017-10-30 14:16 Noel Chiappa
2017-10-30 14:40 ` Clem Cole
2017-10-30 15:23 ` Arthur Krewat
2017-10-30 20:56 ` Dave Horsfall
2017-10-31 10:50 ` Ronald Natalie
2017-11-01 3:23 ` Dave Horsfall
2017-11-01 13:25 ` Tim Bradshaw
2017-11-16 1:17 ` Dario Niedermann
2017-11-15 1:25 ` Nemo
2017-11-15 2:10 ` Will Senn
2017-11-15 2:16 ` Larry McVoy
2017-11-15 2:37 ` Warner Losh
2017-11-15 3:07 ` Will Senn
2017-11-15 16:13 ` Arthur Krewat
2017-11-15 16:23 ` Arthur Krewat
2017-11-15 16:48 ` Clem Cole
2017-11-15 18:13 ` Bakul Shah
2017-11-15 19:01 ` Clem Cole
2017-11-15 9:58 ` Andy Kosela
2017-11-15 11:42 ` Ralph Corderoy
2017-11-01 14:05 ` Ralph Corderoy
2017-11-01 16:42 ` arnold
2017-11-01 17:17 ` Ralph Corderoy
2017-11-01 18:03 ` Dan Cross
2017-11-01 18:06 ` arnold
2017-11-01 20:16 ` Bakul Shah
2017-11-01 20:37 ` arnold
2017-11-01 21:04 ` Bakul Shah
2017-11-02 0:05 ` Chet Ramey
2017-11-02 0:10 ` Ralph Corderoy
2017-10-31 16:43 ` Don Hopkins
2017-11-02 17:48 ` Paul Winalski
2017-10-30 21:50 ` Charles Anthony
2017-10-16 17:52 Clem Cole
2017-10-16 18:54 ` Dan Cross
2017-10-17 13:51 ` Tony Finch
2017-10-17 20:22 ` Steffen Nurpmeso
2017-10-16 20:05 ` Bakul Shah
2017-10-30 0:55 ` Ralph Corderoy
2017-10-30 2:54 ` Bakul Shah
2017-10-30 14:05 ` Ralph Corderoy
2017-10-16 20:39 ` Andy Kosela
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