On Fri, Dec 13, 2013 at 04:32:49PM +0100, Pino Toscano wrote:
The current add_cdrom way basically appends a new raw "-cdrom /path" parameter to the qemu invocation (even when using libvirt as backend), hence such images are seen as "CD-ROM drives" inside the appliance. However, there is no need for such particular behaviour, as they need to be handled as normal (read-only) drives.
Adding CD-ROM disk images as drives also changes the device names used for them inside the appliance from /dev/srN to the usual e.g. /dev/sdX.
These changes fix different issues: - it is possible to start guestfish without adding disks with -a, then just add-cdrom and run - list-devices does not cause guestfishd to crash when sorting the list
s/guestfishd/guestfsd/
of devices (exposed by the test case in RHBZ#563450) - the result of list-devices now reflects the order images were added (RHBZ#563450)
Add two small regression tests for the fixes described above. --- src/drives.c | 7 +----- tests/regressions/Makefile.am | 2 ++ tests/regressions/rhbz563450.sh | 54 ++++++++++++++++++++++++++++++++++++++++ tests/regressions/rhbz563450b.sh | 43 ++++++++++++++++++++++++++++++++ 4 files changed, 100 insertions(+), 6 deletions(-) create mode 100755 tests/regressions/rhbz563450.sh create mode 100755 tests/regressions/rhbz563450b.sh
diff --git a/src/drives.c b/src/drives.c index 16798a3..4b65dda 100644 --- a/src/drives.c +++ b/src/drives.c @@ -1087,12 +1087,7 @@ guestfs__add_cdrom (guestfs_h *g, const char *filename) return -1; }
- if (access (filename, F_OK) == -1) { - perrorf (g, "%s", filename); - return -1; - } - - return guestfs_config (g, "-cdrom", filename); + return guestfs__add_drive_ro (g, filename); }
I don't think this implementation is quite right because it leaves the [now] bogus check for ':' in the filename. guestfs_add_drive_ro can handle ':' in the filename (because it creates an overlay): $ truncate -s 100M foo:bar $ guestfish --ro -a foo:bar Welcome to guestfish, the guest filesystem shell for editing virtual machine filesystems and disk images. Type: 'help' for help on commands 'man' to read the manual 'quit' to quit the shell
<fs> run
I think it's better to remove the contents of the guestfs__add_cdrom function completely, so the function will become just: int guestfs__add_cdrom (guestfs_h *g, const char *filename) { return guestfs__add_drive_ro (g, filename); } [...]
+# https://bugzilla.redhat.com/show_bug.cgi?id=563450 +# Test the order of added images + +set -e +export LANG=C + +rm -f test.out + +../../fish/guestfish --ro > test.out <<EOF +add-drive-ro ../guests/fedora.img +add-cdrom ../data/test.iso +add-drive-ro ../guests/debian.img
Earlier in the test, you'll probably need to add this: if [ ! -s ../guests/fedora.img -o ! -s ../guests/debian.img ]; then echo "$0: test skipped because there is no fedora.img or debian.img" exit 77 fi --- Also, should we update the documentation? http://libguestfs.org/guestfs.3.html#guestfs_add_cdrom Maybe or maybe not worth it. --- Patch looks good apart from these three small issues. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 80 OCaml packages (the OPEN alternative to F#)