Pierre Gaston wrote:
b=$a is not doing anything so I wonder how much value this example has.
---
I wondered about that.. think that was meant to be the
b=($a) w/o the copy that greg said was pointless.
A pipe means 2 different processes, a tempfile for a heredoc does not.
First) we
On Tue, Oct 7, 2014 at 2:25 AM, Dave Rutherford d...@evilpettingzoo.com
wrote:
**it.. sorry for the fat finger post. Gmail puts the tiny formatting options
right next to the big SEND button. Ratzen fracken.
On Monday, October 06, 2014 02:00:47 PM Linda Walsh wrote:
Greg Wooledge wrote:
On Mon, Oct 06, 2014 at 12:38:21PM -0700, Linda Walsh wrote:
According to Chet , only way to do a multi-var assignment in bash is
read a b c d $(echo ${array[@]})
It's best to avoid turning your nice data
On 10/6/14, 3:14 PM, Linda Walsh wrote:
In running a startup script, I am endeavoring not to use tmp files
where possible, As part of this, I sent the output of a command
to stdout where I read it using the variable read syntax:
while read ifname hwaddr; do
printf ifname=%s,
On 10/6/14, 5:00 PM, Linda Walsh wrote:
You are working in a severely constrained environment.
That isn't the problem: the assignment using a tmp file is:
strace -p 48785 -ff
Process 48785 attached
read(0, \r, 1)= 1
write(2, \n, 1) = 1
On 10/6/14, 6:03 PM, Linda Walsh wrote:
Not sure how but this went off into space, sorta...
Greg Wooledge wrote:
On Mon, Oct 06, 2014 at 12:14:57PM -0700, Linda Walsh wrote:
done $(get_net_IFnames_hwaddrs)
Where am I using a HERE doc?
and both create temporary files.
On 10/7/14, 2:07 AM, Linda Walsh wrote:
I thought I was getting rid of this bogus problem (which shouldn't
be a problem anyway -- since it's just another pipe but with parent receiving
the data instead of child receiving it) by storing it in a variable
transfer form
($VAR)... cuz was told
On 10/6/14, 6:16 PM, John E. Malmberg wrote:
Do you mean return ; ?
Yes, good catch. It doesn't make a difference: clang and gcc both accept
it as written and it behaves as desired. However, I'll change it for the
next version.
Changing it to return 0 instead of '\0' would probably be
On 10/7/14, 8:55 AM, Dan Douglas wrote:
Um... it used a socket.. to transfer it, then it uses a tmp file on top
of that?! :
That's the wrong process. AF_NETLINK is the interface used by iproute2 for
IPC
with the kernel. Bash doesn't use netlink sockets.
It's syslog. Some vendors
2014-09-30 17:06:22 +0100, Stephane Chazelas:
[...]
$ env -i $'a\necho test\na=b' bash -c 'export -p'
declare -x OLDPWD
declare -x PWD=/home/stephane
declare -x SHLVL=1
declare -x a
echo test
a
[...]
Just reiterating in case that had gone unnoticed earlier:
$ env 'a;echo OOPS;: =' bash -c
Chet Ramey wrote:
On 10/7/14, 8:55 AM, Dan Douglas wrote:
Um... it used a socket.. to transfer it, then it uses a tmp file on top
of that?! :
That's the wrong process. AF_NETLINK is the interface used by iproute2 for IPC
with the kernel. Bash doesn't use netlink sockets.
It's syslog.
On Tue, Oct 07, 2014 at 09:54:21AM -0700, Linda Walsh wrote:
Chet Ramey wrote:
It's syslog. Some vendors integrated patches that log all shell commands
to syslog.
No... that wasn't syslog, it was strace in another terminal where I attached
the bacsh that was doing the various types of data
Greg Wooledge wrote:
OK, then use a function to give you an escapable block:
declare -A ...
create_maps() {
cd $sysnet || return
for ifname in ...; do
hwaddr=$($ifname/address)
act_hw2if[$hwaddr]=$ifname
act_hw2if[$ifname]=$hwaddr
done
}
create_maps
On Tue, Oct 7, 2014 at 8:45 PM, Linda Walsh b...@tlinx.org wrote:
Greg Wooledge wrote:
OK, then use a function to give you an escapable block:
declare -A ...
create_maps() {
cd $sysnet || return
for ifname in ...; do
hwaddr=$($ifname/address)
On 10/7/14, 1:45 PM, Linda Walsh wrote:
There is no fundamental reason why, say, process substitution needs to
use /dev/fd or /proc/anything -- and couldn't operate exactly like piped
processes do now. On my first implementation of multiple IPC programs,
I've used semaphores, message queues,
Pierre Gaston wrote:
That's where you are wrong, there is no reason for *your* use case, but the
basic idea behind process substitution is to be able to use a pipe in a
place where you normally need a file name.
Well, that's not what I needed it for. I needed to read from a child
process
On 10/7/14, 5:35 PM, Linda Walsh wrote:
Chet Ramey wrote:
On 10/7/14, 1:45 PM, Linda Walsh wrote:
There is no fundamental reason why, say, process substitution needs to
use /dev/fd or /proc/anything -- and couldn't operate exactly like piped
processes do now. On my first implementation
On 10/7/14, 6:31 PM, Ángel González wrote:
Changing it to return 0 instead of '\0' would probably be more clear.
No need to return a pointer to a static empty string.
It depends on how you want the function to work. It is nice to
differentiate between the cases where there is no shell input
On 10/7/14, 12:28 PM, Stephane Chazelas wrote:
Since those environment variables cannot be mapped to shell
variables, they should not be included in the output of export
-p.
Thanks. This will be fixed in the next release of bash.
I can see there are a number of bugs at savannah
Chet Ramey wrote:
On 10/6/14, 6:03 PM, Linda Walsh wrote:
Not sure how but this went off into space, sorta...
Greg Wooledge wrote:
On Mon, Oct 06, 2014 at 12:14:57PM -0700, Linda Walsh wrote:
done $(get_net_IFnames_hwaddrs)
Where am I using a HERE doc?
and both create temporary
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