Hello again, Marcus.
I'm having a problem with gphoto2, I'm using it in a arm machine with this version:
gphoto2 2.5.10 gcc, popt(m), exif, no cdk, no aa, no jpeg, no readline
libgphoto2 2.5.10 all camlibs, gcc, ltdl, EXIF
libgphoto2_port 0.12.0 gcc, ltdl, USB, serial without locking

the problem consist in that when I attempt to take a photo and capturing fails the exit error code of gphoto2 is always 0
if I execute
#!/bin/bash
/usr/local/bin/gphoto2 --capture-image-and-download
Error_gphoto=$?
echo "-------error_gphoto = (" $Error_gphoto ")"
``
I get ....
.
.
.
ERROR: Could not capture image.
ERROR: Could not capture.
*** Error ***
An error occurred in the io-library ('Could not lock the device'): Camera is already in use.
-------error_gphoto = (0)
or ....
.
.
*** Error ***
An error occurred in the io-library ('Could not lock the device'): Camera is already in use.
*** Error (-60: 'Could not lock the device') ***
-------error_gphoto(0)

am I doing something wrong ?. Any idea on how to detect when a error happens in gphoto2 by other method ?
I have been using this method from long time ago and I think that is something new in 2.5.10, I'm not sure but I think that it was working fine until I upgraded.
Best regards.
Inco.