Re: non working code .. loop ends after one

[alex xmb ratchev]

On Thu, Mar 2, 2023, 12:07 AM alex xmb ratchev <fxmbsw7@gmail.com> wrote:

>
>
> On Wed, Mar 1, 2023, 11:23 PM Kerin Millar <kfm@plushkava.net> wrote:
>
>> On Wed, 1 Mar 2023 22:11:35 +0100
>> alex xmb ratchev <fxmbsw7@gmail.com> wrote:
>>
>> > hello ,
>> > im at a scp file list script
>> > it had few typos , then it began to work
>> > but only one line outta the file
>> > then nothing , just exit ..
>> >
>> >  the cmd is
>> > bash -x scp.u shone {user}@192.168.106.97:/mnt/1/fav aa1
>> >
>> > shone the ' ssh hash one dir '
>> > aa1 is a \0 sep file list
>>
>> Are you sure?
>>
>
> file list is normalo , in less -RU the \0 show as ^@ , also in terminal
> IFS= read .. loop it works
>
> In any case, the code is odd. sep=${sep:-\\0} assigns '\0' if otherwise
>> undefined. [[ $sep == *\\* ]] && declare -a "sep=$( $'sep' )" will then
>> make sep an array (why?) whose first element is an empty string. It is
>> unnecessarily complicated and error-prone. Just let sep _be_ the empty
>> string to begin with, if you expect records ending with NUL.
>>
>
> its expected , ..
> i tried make \0 or \n ( or other accessable )
> the bash read -d way is '' for 0 and <real n> for n
>
> bash read -d sep 'one_char( or more i dunno )'
> in awk it doesnt matter
> user enters ( or by default ) \0 it needs to expand , bash read '' but uh
> for awk i think i got a workaround there ..
> .. i just looked , awk is elsewhere , i had an other version in mind ..
>
> i used declare [-a] "<definition>' to make bash parse the \<code>
>
> ( $sep is _needed_ to be empty , for bash \0 case , its .. empty .. read
> -rd "$empty" )
>
> Despite this, it doesn't do the wrong thing in the case that sep begins by
>> being unset/empty.
>>
>
> despire i didnt awk ..
> say a user wants to enter \0 or \n
> the literal string
> i use this declare to make it "$read_d_value"
>
> $ unset -v sep; sep=${sep:-\\0}; [[ $sep == *\\* ]] && declare -a "sep=(
>> $'$sep' )"
>> $ declare -p sep
>> declare -a sep=([0]="")
>> $ printf '%s\0' foo bar | { IFS= read -rd "$sep" x; IFS= read -rd "$sep"
>> y; declare -p x y; }
>> declare -- x="foo"
>> declare -- y="bar"
>>
>> This works because "$sep" == "${sep[0]}" == "". If you were to produce a
>> smaller test case that someone else can easily run, it could help to get to
>> the bottom of it.
>>
>
> about a test case , i cant from scratch bughunt , like script new
> but it should be simple a one cmd for my script ..
>
> done .. in my tests to localhost scp said connection closed , was with
> localhost and port 1112 ( andro deb proot )
> i did add rest code to support port= passing
> changed to laptop ip and port 22 ..
> .. does same error , one file , then no more
>

in short thats the case , i second last line
done <"$df" ( datafile ) or $fl filelist
last line done outer loop
then the story is that < $df works 1once , then it exits ( by read failing
maybe )
or , when hash of first file is existing ( == file sent complete ) , it
doesnt go past .. exit

set -x ; t=/tmp/testssh/ o=$t/out/ i=$t/in/ h=$t/hash/ port=22 ; rm -rf
> "$t" ; mkdir -p "$t"{,in,out,hash} ; seq 3 >"$o/1" ; seq 5 7 >"$o/2" ; seq
> 100 77 >"$o/3" ; port=$port pf="$o" bash -x scp.u "$h/first"
> ye@192.168.247.97:"$i" <( find "$o" -depth -type f -print0 )
>
> --
>> Kerin Millar
>>
>