Hi. I have a quite nasty issue on Linux Hosted AROS (surely on ABIv0 32bit i386 Icaros Destkop, but it might be true for 64bit ABIv1 version as well).
If I give this command:
waitnotify t:pippo
it correctly works and the shell waits for me doing anything on that file, even simply creating it if it does not exist. However, if I give the very same command on the hosted filesystem, for instance:
waitnotify sys:pippo
I get this error instead:
WaitNotify: StartNotify() failed on "Sys:pippo"
I guess the EMU filesystem handler lacks of come notification feature, and this might have also something to do with the fact that I can't - for instance - connect a USB pendrive on Linux and have hosted AROS look into its contents (the folder /media/paolone/something, or wherever I mount it, remains empty). So I have a first question for you
1. would anyone be so kind to fix this? How much time/effort would be required?
Then, the workaround. Since I *NEED* to stop the execution of a shell script and wait for a file actually being created by a different process (which is running on the Linux host, so AROS wouldn't be aware of this happening in other ways), I wrote a very simple AROS shell script which basically accepts the file to be created (and some sort of time counter, if I express this in the form: S:waitforfile <filename>@@<number of cycles>). The problem is, obviously, that I can't invoke it from other scripts, unless anyone teaches me how to do that:
.KEY w01/A
.BRA {
.KET }
FailAt 21
; DEBUG
; echo entered argument: ##{w01}##
; this script allows to wait for a while, until a file pops up!
; check for missing arguments
if "{w01}" EQ ""
echo "Missing file to wait for. Usage:"
echo "waitforfile path:to/file@@cycles"
skip FINE
endif
echo "{w01}" >t:wffarg ; argument of waitforfile
grep -c "@@" t:wffarg >t:wffck ; number of occurrences of @@ string
if ${t:wffck} GT 0 VAL
; ok, it seems we have a cycles number to wait for
cut "{w01}" WORD 2 SEPARATOR @@ >t:wffcounter
cut "{w01}" WORD 1 SEPARATOR @@ >t:wffarg
set M=${t:wffcounter}
delete t:wffcounter >NIL:
else
; set a number of cycles to timeout
set M=7200
endif
delete t:wffck >NIL:
Set L=0 ; reset counter
Lab LOOP
Set L=`eval $L+1`
if EXISTS "${t:wffarg}"
skip FINE
endif
if $L EQ $M VAL
echo "Timeout reached, file not found."
skip FINE
endif
skip LOOP back
Lab FINE
; end of file
; echo $L
unset L >NIL:
unset M >NIL:
I can easily replicate the central part of the script wherever I need it, but I wonder if we have a C utility that does almost the same thing here.
If you copy'n'paste, then save the script as S:waitforfile, and then protect +S it, you would be able to use it this way
execute s:waitforfile t:pippo --> wait for t:pippo to be created, times out after ~10 minutes (7200 is the number of cycles to wait for it)
execute s:waitforfile t:pippo@@-1 --> wait for t:pippo to be created, forever (counter adding units would never reach -1, since it would be always superior)
execute s:waitforfile t:pippo@@1000 --> wait for t:pippo to be created, for 1000 cycles (more or less 1 minute, depending on your PC speed)
