On Apr 08 2025, MacBeth wrote:
> while ((dur /dev/null; do
You can use kill -0 $! to check if the process still exists.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Mär 31 2025, Chet Ramey wrote:
> It's hard to see these as being useful if they're glibc-specific.
They are coming from ISO TR 14652 and 30112.
--
Andreas Schwab, sch...@linux-m68k.org
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"And now for so
On Mär 26 2025, Andreas Kähäri wrote:
> The argument to "bash -c"
There is no "bash -c" in that command.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Wed, Mar 26, 2025 at 01:35:12PM +0100, Andreas Schwab wrote:
> On Mär 26 2025, Andreas Kähäri wrote:
>
> > The argument to "bash -c"
>
> There is no "bash -c" in that command.
>
> --
> Andreas Schwab, SUSE Labs, sch...@suse.de
> GPG Key fing
On Wed, Mar 26, 2025 at 12:19:48PM +0100, Andreas Schwab wrote:
> On Mär 26 2025, Léa Gris wrote:
>
> > Even though LC_NUMERIC=C is used to correctly parse 3.141592654, the
> > expansion of $LC_NUMERIC still prints its original value (fr_FR.UTF-8).
>
> That is exp
cludes putting LC_NUMERIC=C in the
temporary environment for the command).
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Feb 22 2025, Phi Debian wrote:
> I forgot to mention your trick to nuke the fmt reuse still works
>
> $ printf '%s %s %s %999$s' A B C D E F G
> A B C
As long as NL_ARGMAX >= 999.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69
he command line before the
single-character options to be recognized.
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
effect.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
On Feb 10 2025, Greg Wooledge wrote:
> No, I've shown that it *is* working in older versions of bash, and I'm
> asking *why*.
Does it? If it did, it should have printed -23, not -19.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE
meter:-word}``
> --
[cut]
This was recently discussed:
https://lists.gnu.org/archive/html/bug-bash/2025-01/msg00144.html
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
e, tab, and newline, by default), but also from
> using the split-up value as filename globbing patterns, which is what
> happens in your case.
>
> Just double quote the variable expansion:
>
> echo "$foo"
>
>
Sorry, I pressed send too quickly. I was going to suggest an alternative
to using a command substitution and tr:
printf -v foo '%*s' 80 ' '
echo "${foo// /*}"
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
$IFS (space, tab, and newline, by default), but also from
using the split-up value as filename globbing patterns, which is what
happens in your case.
Just double quote the variable expansion:
echo "$foo"
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
ffectively allows for recursive arithmetic expansion of the right-hand
side of an assignment to a variable with the integer attribute.
Recursive, that is, until the right-hand side is no longer a variable's
name, at which point the expansion stops and the value is assigned (or
an error is generated if the value is not a valid integer).
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
On Jan 05 2025, Tobi Laskowski wrote:
> "Additionally, if it is in the environment at start up, the variable is
> automatically exported
That is a general property of every environment variable.
--
Andreas Schwab, sch...@linux-m68k.org
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On Jan 03 2025, Dale R. Worley wrote:
> It does seem like "bind" could be improved by providing an option that
> shows all of the keysequences and what they are bound to.
bind -p | sort
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 255
$ PS1="\[$(tput bold)\]\w\\\$\[$(tput sgr0)\] "
$ cd /tmp
$ for i in 1 2 3 4 5 6 7 8; do mkdir 1234567890; cd 1234567890; done
The second line of the prompt is not rendered in bold, and as the edited
line gets longer the cursor jumps to the leftmost screen column.
--
Andreas S
On Dez 22 2024, Martin D Kealey wrote:
> If you don't mind even more thinking then you can instead memorize the list
> of characters that need \ and skip all the others; they are space, tab,
> newline, and "#$'&<>*()?`\[]|
Careful. \ has a different meaning.
On Dez 11 2024, Mike Jonkmans wrote:
> Can a command - as part of a pipeline - not be a pipeline?
! true | { ! true; }
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Dez 10 2024, Mike Jonkmans wrote:
> With 'if false... fi | true' there are two pipelines:
> 1) false
> 2) (compound command) if | true
There is only one pipeline, consisting of two commands.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1
commands as part of
the pipeline (by your reasoning) are `false' and `true'.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
pipeline are commands.
> Both other examples, e.g. 'if false; then :; fi | true',
> are, for PIPESTATUS purposes, equivalent to: 'true | true'.
Why is `if false; then :; fi' not equivalent to `true' above?
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fi
What is your value of COMP_WORDBREAKS?
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Sun, Nov 24, 2024 at 10:51:43PM +1000, Martin D Kealey wrote:
> On Sun, 24 Nov 2024 at 18:05, Andreas Kähäri wrote:
>
> > I think the manual is quite clear:
> >
> > Within [ and ], character classes can be specified
> > using the syntax [:clas
On Sun, Nov 24, 2024 at 02:58:45PM -0500, Lawrence Velázquez wrote:
> On Sun, Nov 24, 2024, at 10:08 AM, Andreas Kähäri wrote:
> > On Sun, Nov 24, 2024 at 09:31:42AM -0500, Greg Wooledge wrote:
> >> Similar cases exist elsewhere within the man page. For example, if you
>
it.
> So, if someone scans down the page until they find the eye-catching
> ${paramter:-word} definitions, and keeps reading from that point,
> they will eventually find the paragraph about the colons, even before
> the table. They don't have to read *backwards* to find it.
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
s with
> a bit of misunderstanding, leading to a few lost hours.
> --
> Dormouse
I think the manual is quite clear:
Within [ and ], character classes can be specified
using the syntax [:class:], where class is one of the
following classes defined in the POSIX standard:
alnum alpha ascii blank cntrl digit graph lower print
punct space upper word xdigit
It says that the syntax "[:class:]" may be used within "[" and "]". To
match a space-like character (including spaces, newlines and various
types of tabs), you would therefore use "[[:space:]]".
Would you want to match only a space, you would use a literal space.
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
>
> ___
>
> Reply to this item at:
>
> <https://savannah.gnu.org/bugs/?66460>
>
> ___
> Message sent via Savannah
> https://savannah.gnu.org/
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
On Okt 13 2024, Oğuz wrote:
> Why though? Can't bash just close the procsub's stdin when `:' returns?
bash has no handle on the command's stdin.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And
On Okt 12 2024, Saint Michael wrote:
> After using printf, right now I need to lunch a second command if I
> need to expand the \n into real new lines.
$ printf %b '\n'
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9
> Even the venerable BASH shell still has room for modernization
> and improvement. Thank you for your interest and consideration.
How is $((10#${data_line:12:2})) not modern?
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA
On Aug 29 2024, Andrey Kovalev wrote:
> - for (fmt = format; *fmt; fmt++)
> + for (fmt = format; fmt - format < strlen(format); fmt++)
How is that different (apart from turing a linear runtime into quadratic
runtime)?
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fi
her a variable contains only an empty string,
use "test -z variablename". Note that that does not test whether the
variable is *set* though (unset variables expand to empty strings too,
unless "set -u" is in effect, in which case it provokes an "unbound
variable" diagnosti
The wrong thing is that the history contains commands that were never
executed: echo 13456 and echo 21234.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Jul 01 2024, Chet Ramey wrote:
> On 7/1/24 3:54 AM, Andreas Schwab wrote:
>
>> So what did change in 5.3 that this is now broken?
>
> If you want to report a bug, report one. Be specific about what you
> think is wrong and what you think the correct behavior is.
The corre
which happens to
> leave the `echo 3456' unchanged -- coincidentally the first history entry
> changed by moving around the history list and editing.
So what did change in 5.3 that this is now broken?
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4
4 echo 1234
5 history
bash-5.3$ echo 2345
2345
bash-5.3$ history
1 echo 1234
2 echo 2345
3 echo 13456
4 echo 21234
5 history
6 echo 2345
7 history
bash-5.3$ exit
$ cat history
echo 1234
echo 2345
echo 3456
echo 21234
history
echo 2345
history
--
Andreas S
Why do you think this is a bug in bash? You are telling the shell to
export any modified variable, and you get what you asked for.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
On Mon, May 20, 2024 at 01:54:20PM -0400, Greg Wooledge wrote:
> On Mon, May 20, 2024 at 07:43:10PM +0200, Andreas Kähäri wrote:
> > On Mon, May 20, 2024 at 05:31:05PM +, Matheus Afonso Martins Moreira
> > wrote:
> > > >> Why not add a -p option to &#x
t;
> I think this is a really good solution. I hadn't thought of it.
> Users can even make an alias to set a default for themselves.
>
> -- Matheus
Or even
PATH=${BASH_SEARCH_PATH-$PATH} . file
without the need to add any options to . or to source. But maybe that
too pedestrian?
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
is wider than int, it can
return a wrong value even if the subtraction doesn't overflow.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
thing like SIGHUP.
But leaving it in the process group of the parent shell does not
accomplish that, which is actually the point of this thread. A process
substitution is similar to a pipeline; it really belongs to the process
group of the command that reads from it.
--
Andreas Schwab, SUSE Labs,
In 5.3-alpha, it is no longer possible to quote the special % and #
characters in a pattern replacement expansion.
$ a=1/%2/%3
$ echo "${a/\%/##}"
1/%2/%3##
$ echo "${a/\/%/##}"
1##2/%3
The second example shows that quoting still works as expected for
${PARAMETER//PATTERN/S
bash switches the terminal process group back before the
background process starts reading from the terminal (won't happen in
this example since the cat command blocks on reading the process
substitution file).
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69
from a terminal.
Since the redirection fails and the cat command is never started, bash
doesn't switch the terminal process group, and the background wc command
goes on competing with bash for the terminal.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
error". Or we can ctrl C.
> Version 5.2
>
> Kind regards
> Quoc Tri do
What was it that you intended to do when you composed that command?
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
On Apr 28 2024, Chet Ramey wrote:
> On 4/27/24 8:09 AM, Andreas Schwab wrote:
>> On Apr 27 2024, Kerin Millar wrote:
>>
>>> At some point after upgrading to bash-5.3-alpha, the following message
>>> appeared in my kernel ring buffer.
>>>
>>> [
?aa'
> # touch 'something-else'
> # rmdir :
>
> ... produces nothing until pressing the tab key a second time, after which
> both entries are listed while the content of readline's input buffer remains
> unchanged.
':' is in $COMP_WORDBREAKS.
--
Andrea
n later kernels, but nevertheless,
bash should pass MFD_NOEXEC_SEAL (if defined) when it calls
memfd_create.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
The exit status of an "if" statement is the exit status of the last
command executed within the body of the statement.
In your last example, nothing is executed by the body of the "if"
statement, so the exit status of the statement is zero.
>From the bash manual about this in the "Compound Commands" section:
The exit status is the exit status of the last command
executed, or zero if no condition tested true.
The PIPESTATUS array is set by virtue of executing the "false" command
in the "if"-satement's test.
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
nary data doesn't work if you're reading newline-terminated
> records, because you cannot store the NUL character in a shell
> variable. But you can delimit your records on NULs, and use printf to
> reproduce them.
Though that will likely add a spurious null at EOF.
--
Andreas Schwab,
On Apr 15 2024, Greg Wooledge wrote:
> And that's a bug. That code is wrong, and it should be written this way
> instead:
>
> [ -z "$var1" ] && [ -z "$var2" ] && continue
Or just [ -z "$var1$var2" ] && continue
--
And
On Apr 08 2024, Greg Wooledge wrote:
> Now imagine what happens if the shell is killed by a SIGKILL, or if
> the system simply crashes during the script's execution. The script
> is left with altered permissions.
Or the script is executed by more than one process at the same time
not performed,
> because the "$2 is a binary primary" check comes first. This is how
> POSIX documents it.
FWIW, ksh parses it the other way round:
$ ksh93 -c '[ ! -a /tmp ]; echo $?; [ . -a /tmp ]; echo $?; [ - -a /tmp ]; echo
$?'
1
0
ksh93: [: -: unknown operator
2
--
And
confuse the two is
a different matter, but the documentation is correct for the current
implementation (which mimics the ksh shell with regards to the unary
"-a" operator).
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
On Feb 29 2024, Martin D Kealey wrote:
> Should octal or hexadecimal be allowed (since they're easier to express
> powers of two)?
For this, $(( )) already provides enough support.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D
On Feb 21 2024, Christian Convey wrote:
> E.g., for limiting virtual memory to 8 gigabytes, the invocation is "ulimit
> -v 8388608", rather than something like "ulimit -v 8gb".
Or ulimit -v $((8*1024*1024))
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerp
ion
further.
> I think that escaping is needed after quote removal in shell-expand-line.
The function is called shell-expand-line, not
shell-expand-and-requote-line.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"An
s doing exactly what it is documented to do, that is do all
of the shell word expansions.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Jan 29 2024, Robert Elz wrote:
> I always wondered why the option was 'n'
n = next?
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Dez 21 2023, Britton Kerin wrote:
> But if I do `complete git' at a new shell
That overwrites the completion spec for git (with the empty set, ie. no
completions at all). If you want to print existing completions, use
complete -p [NAME...].
--
Andreas Schwab, sch...@linux-m68k.org
t; content in a single string variable, which is a questionable idea in
> most programs.
For interactive use, $(< ...) is convenient and less verbose than the
alternatives.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
et the $0 special parameter.
$ bash -c 'echo $0 $2 $1' foo bar mumble
foo mumble bar
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
On Nov 25 2023, Emanuele Torre wrote:
> But the bash executable still does not contain the legal_ symbols:
If bash does not reference any of the symbols in lib/sh/compat.c there
is nothing pulling it in.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2
es) works fine in the original pipeline, without
> needing the redirect to /dev/null:
>
> $ echo foo | tee >(xsel -i) | tr o x
> fxx
That's because xsel is properly daemonizing itself, disconnecting from
its stdin/out/err.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprin
rrors only (default)
-quiet show informational messages on the terminal and run in the fore-
ground
-verbose
provide a running commentary of what xclip is doing
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
do
...
done
... as opposed to the "for" command on the form
for i in some list; do
...
done
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
for multi-line commands that happen to contain matches for
re.
$ (sleep 100; printf $'\n[100]\n') &
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
On Nov 06 2023, Chet Ramey wrote:
> If nullglob is set, the non-matching pattern expands to the null string,
> which is removed by word splitting.
Since filename expansion happens after word splitting, this cannot be
true.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint
that do not match
any names are *removed*. That way one avoids the complications and
ambiguities of explaining what the pattern expands or not expands to.
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
P Fri Jan 27 02:56:13 UTC
> 2023 x86_64 x86_64 x86_64 GNU/Linux
>
> MS Windows MSYS2 (derived from Cygwin)
> GNU bash, version 5.2.15(1)-release (x86_64-pc-msys)
> MSYS_NT-10.0-19045 bob 3.4.6.x86_64 2023-02-15 18:03 UTC x86_64 Msys
>
> Oracle on ARM
> GNU bash, version 5.1.16(1)-release (aarch64-unknown-linux-gnu)
> Linux ub01 5.15.0-1034-oracle #40-Ubuntu SMP Wed Apr 19 16:10:04 UTC 2023
> aarch64 aarch64 aarch64 GNU/Linux
--
Andreas (Kusalananda) Kähäri
Uppsala, Sweden
.
,2], where apparently wait() returns an
undocumented exit code.
Since wait seems to also be involved above, I tend to blame this in qemu now...
[1] https://savannah.gnu.org/bugs/?64664
[2] https://lists.gnu.org/archive/html/qemu-devel/2023-09/msg03207.html
--
Andreas K. Hüttel
dilfri...@gentoo.org
Gentoo Linux developer
(council, toolchain, base-system, perl, libreoffice)
signature.asc
Description: This is a digitally signed message part.
ad' builtin
> is called. The /dev/tty tests can be fooled by typeahead while the tests
> are running, but that doesn't usually happen.
Could a timeout also mean that part of the data "got lost" and it's
trying to read more than is available?
--
Andreas K. Hüttel
dilfri...@gentoo.org
Gentoo Linux developer
(council, toolchain, base-system, perl, libreoffice)
signature.asc
Description: This is a digitally signed message part.
Am Dienstag, 12. September 2023, 21:55:13 CEST schrieb Chet Ramey:
> On 8/31/23 7:02 PM, Andreas K. Huettel wrote:
> > Dear all,
> >
> > I'm trying to get qemu usermode emulation of riscv32 working.
> > I managed to cross-build a linux system, and have it mostly r
e cursor position (it just needs a
> longer prompt):
>
> $ long_name="$(printf 'abcdef0123456789/%.0s' {0..20})"
> $ mkdir -p /tmp/$long_name
> $ cd /tmp/$long_name
> $ PS1=$'\n\[\e[1m\]\w\[\e[m\] \$ '
>
> Now press the u
how "exportable functions" work). However, since
this is not generally supported, and definitely not supported by the
default configuration of bash, using this feature makes your scripts
hopelessly non-portable. That's part of the "or wha". I haven't looked
at the implementation, so Kerin's view may be more informed than mine.
--
Andreas (Kusalananda) Kähäri
SciLifeLab, NBIS, ICM
Uppsala University, Sweden
.
told bash works
fine in a riscv32 system emulation.
Below is the output of the bash testsuite. Any advice on where to
start looking for problems would be appreciated.
Best, Andreas
>>> Test phase: app-shells/bash-5.2_p15-r6
make -j1 check
make[1]: Entering directory
'/var/tmp
ble scope
is restricted to that function and its children (including the
functions it calls).
>
>
> On Wed, Aug 30, 2023 at 5:59 PM Andreas Kusalananda Kähäri <
> andreas.kah...@abc.se> wrote:
>
> > On Wed, Aug 30, 2023 at 03:40:21PM +0300, queency3 jones w
t; will remain unchanged (until you increment it from "3" to "4").
On an unrelated note, you sohuld be printing the value using a static
formatting string, like so:
printf '%s\n' "$aa"
This avoids interpreting the value of the variable as a printf formatting
string.
--
Andreas (Kusalananda) Kähäri
SciLifeLab, NBIS, ICM
Uppsala University, Sweden
.
affect EOF
processing if the file is a pipe.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Aug 08 2023, Dale R. Worley wrote:
> More troublesome, I think, are several variable substitutions which
> include "!" followed by a name. But I doubt they're used much in
> interactive mode.
The history expansion is smart enough to not interfere with ${!var}.
; Actual output: bash: foo: unbound variable
This is expected. If the array is an indexed array, the subscript is an
arithmetic expression. When bash tries to evaluate the subscript, it
finds that foo is unbound.
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Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 B
are implementing POSIX wrong.
> Except zsh.
Note that zsh by default is not a POSIX shell, and even in sh
compatibilty mode it doesn't strive to be POSIX compliant.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
though it does not have
> an an explicit terminator. But that's not specified anywhere in POSIX.
>
> POSIX doesn't say what should be done with the text after the last
> terminator. You could throw it away and still be conforming to POSIX.
>
> --
> Felipe Contreras
--
Andreas (Kusalananda) Kähäri
SciLifeLab, NBIS, ICM
Uppsala University, Sweden
.
sense when you want to know the
> time since the script started.
Even CLOCK_MONOTONIC can jump forward. The only requirement is that it
doesn't jump backward.
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Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
On Mär 08 2023, Grisha Levit wrote:
> I think it might make sense to change code that looks at the value of
> PATH to explicitly treat an empty value as `.' so that all such
> behavior is consistent.
But an unset PATH is *not* the same as PATH=.
--
Andreas Schwab, SUSE Labs, sch.
According to
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/chmod.html
the symbolic mode can contain more than one action concatenated, for
example "g+r-x", which is the same as "g+r,g-x".
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Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196
On Feb 10 2023, Godmar Back wrote:
> It appears to be mistaking the wait status for the exit status if your
> hypothesis is correct.
Easy to verify:
$ sleep 10 && echo yes || echo $?
^Z
[1]+ Stopped sleep 10
148
--
Andreas Schwab, sch...@linux-m68k.org
GPG K
was that two divides are more costly than a
divide and a multiply (although nowadays, compilers will try to combine
the two divides if the target architecture has a divmod insn).
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC
On Jan 07 2023, Martin Schulte wrote:
> Hello!
>
> Am Sat, 07 Jan 2023 19:08:06 +0100 schrieb Andreas Schwab
> :
>
>> On Jan 07 2023, Greg Wooledge wrote:
>> ...
>> I think the original overflow can only happen if the argument of
>> intrand32 is bigger th
overflow, because if l
and h are unsigned, the computed value can never be negative, but it
becomes bigger than INT_MAX if 2836 * h is bigger than 16807 * l (the
unsigned result is computed modulo UINT_MAX+1).
I think the original overflow can only happen if the argument of
intrand32 is bigger th
On Dez 30 2022, Steffen Nurpmeso wrote:
> Not me!! Bash does it right for x=++x,
There is no right answer.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
On Dez 30 2022, Steffen Nurpmeso wrote:
> Andreas Schwab wrote in
> <87358xambe@igel.home>:
> |On Dez 29 2022, Alain D D Williams wrote:
> |> On Thu, Dec 29, 2022 at 10:30:09PM +0100, Steffen Nurpmeso wrote:
> |>
> |>> only clang warns on sequencing
t.c:7:11: warning: operation on ‘i’ may be undefined [-Wsequence-point]
i += j += i += j;
^~
t.c:11:11: warning: operation on ‘i’ may be undefined [-Wsequence-point]
i += j += i += i;
^~
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Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 E
On Dez 17 2022, ks1322 ks1322 wrote:
> When for loop output is piped to less and Ctrl+C is pressed, bash creates
> unexpected stopped job
That's because the process group receives SIGTTIN because less tries to
read from the terminal while it doesn't own it.
--
Andreas Schw
h from 1 to 10
>
>
> example:
>
> source test.sh
> sa 10 20
The function ignores the second argument.
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Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
interruptable while running the
exit trap.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
o stop if from being interpreted as an assignment.
$ \a=b foo
hi
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
46d82c4c95423fb7e10e68eba52050e30ba3/vscode-remote-lock.root.899d46d82c4c95423fb7e10e68eba52050e30ba3)
> leaked on pvs invocation. Parent PID 3789: /usr/bin/bash
That looks more like the FD leak is in vscode (and bash just hands them
through).
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fin
string//\"/"}"
> printf '%s' "$string"
>
> previously outputs:
> xdotool type "sudo apt update"
>
> but now outputs:
> xdotool type "quot;sudo apt update"quot;
shopt -u patsub_replacement
--
Andr
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