How to deal with job that stop and cannot continue unless made foreground?
- by Vi
Recent example: mountlo (using UML):
vi@vi-notebook:~/b$ mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other&
[1] 32561
vi@vi-notebook:~/b$ Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...OK
Checking PROT_EXEC mmap in /tmp...OK
Checking for the skas3 patch in the host:
- /proc/mm...not found
- PTRACE_FAULTINFO...not found
- PTRACE_LDT...not found
UML running in SKAS0 mode
[1]+ Stopped mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other
vi@vi-notebook:~/b$ bg
[1]+ mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other &
[1]+ Stopped mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other
vi@vi-notebook:~/b$ bg
[1]+ mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other &
[1]+ Stopped mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other
vi@vi-notebook:~/b$ bg
[1]+ mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other &
[1]+ Stopped mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other
vi@vi-notebook:~/b$ fg
mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8,allow_other
Linux version 2.6.15 (miko@dorka) (gcc version 3.3.5 (Debian 1:3.3.5-13)) #1 Mon Feb 27 13:27:52 CET 2006
(normal output)
...
vi@vi-notebook:~/b$ socat - exec:'mountlo -m 16 -d /dev/uba1 /home/vi/mnt/usb -t vfat -o iocharset=utf8\,allow_other',pty,ctty
fusermount: waitpid: No child processes
vi@vi-notebook:~/b$
Also happens with Gimp (when it does run it's plug-ins). Parts of Gimp started by `gimp q.jpg&' freeze and cannot continue unless "killall -CONT" or made foreground.
Is it a bug? How to reliably start things in a background?
