-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jelle de Jong wrote: > Hello everybody, > > I have developed this tool that uses scanadf: > https://secure.powercraft.nl/svn/packages/trunk/deb/pct-scanner-scripts/pct-scanner-scripts-devel/ > > It is also waiting for sponsoring to be included into debian: > http://mentors.debian.net/debian/pool/main/p/pct-scanner-scripts > > The tool works fine run from the command line but when trying to > integrate it with keyboard shortcuts i run into serious trouble. I > spent a hole day trying to debug it without luck. > > The script called from scanadf closes unexpected when executing a > command like c44 of convert, i first thought it was a bug in convert > so i made this bug report, see the attachment for info: > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513493 > > But then after further testing I had exactly the same issue with c44 > command. > > It only happens when my tool is not directly executed form a terminal. > > If i run this from a normal xterm of xfce4-terminal it goes wrong: > screen -S scanner /usr/bin/pct-scanner-script --config color2 --clean > or > /usr/bin/xfce4-terminal --hold --execute /usr/bin/pct-scanner-script > --config color2 > > So its not only with screen i get this issue.... > > Both above command result in an unexpected exit of the child script > used by scanadf. > > I also simplified the script that is called form scanadf but it just > dies unexpected when called: see: http://debian.pastebin.com/d5f169270 > > I am complete lost here, I have been pulling out my remaining hairs > for this hole day :-( > > I can both duplicate this issue on two different machines one lenny > and one sid. > > Please help, > > Best regards, > > Jelle de Jong >
Hello everybody, After more debugging with strace I discovered that the running command received a SIGHUP [1] singal, I tried all kind of things like wait, nohup, disown to keep the script called by scanadf running, but no luck. [1] --- SIGHUP (Hangup) @ 0 (0) --- So I created an evil workaround with file status flags, this seems to be working well and waits until the child is finished before closing itself, for the full commit diff see: http://www.powercraft.nl/pipermail/packages-commit/2009-January/000091.html I think the scanadf code, that call the process script is kind of broken, it does not allow for extra arguments (only exported envs) and it does not allow "nohup /path/of/script --argument $file" as argument. Beside this the spawning process of scanadf used for the script is like evil black magic for me ... :-( It took way to much time to debug this issues, the workaround did not take so much time though. Would somebody be willing to take a look at the scanadf code and if possible enhance it. We can talk about some sort of bounty/reward for the possible work. Thanks in advance, Jelle de Jong -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iJwEAQECAAYFAkmCTEMACgkQ1WclBW9j5HnuxQP9HniSp7MEmsKWh7tdI8EE/y5b rKbKXLTMGodMEEs9MQGCGs3MeUFlj7HANypziHK0m7TC5LrLQsEKyCRiT8oBzPKp 7HOXwxDJ3vpSJchQLstj5JlrW9WwyQTLJlvI1PdZ6/EFcEho5uG5V5oFt7h9PXku Gen6L39z82DyinGVFS8= =jqAG -----END PGP SIGNATURE-----
