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Explicitly pass uml_dir argument to user-mode-linux

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uml_dir overrides user-mode-linux's default of ~/.uml. This is needed
for a couple of different reasons:

libvirt expects this to default to virGetUserDirectory(geteuid()) +
'/.uml'. However, user-mode-linux actually uses the HOME environment
variable to determine where to look for the uml sockets, but if running
libvirtd under sudo (which I routinely do during development), $HOME is
pointing at my user's homedir, while my euid is 0, so libvirt looks in
/root.

Also (and this was my actual motivation for this patch), if HOME isn't
set at all, user-mode-linux utterly fails. Looking at the code, it seems
it's meant to emit a warning, but alas, it doesn't for some reason.
If running libvirtd from upstart, HOME is not set, so any system using
upstart will need this change.

Signed-off-by: Soren Hansen <soren@linux2go.dk>
This commit is contained in:
Soren Hansen 2010-08-25 11:03:42 +02:00 committed by Eric Blake
parent deaa9e3ebd
commit 0a58eed3d9
1 changed files with 2 additions and 2 deletions
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4
src/uml/uml_conf.c
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@ -409,7 +409,7 @@ static char *umlNextArg(char *args)
* for a given virtual machine.
*/
int umlBuildCommandLine(virConnectPtr conn,
struct uml_driver *driver ATTRIBUTE_UNUSED,
struct uml_driver *driver,
virDomainObjPtr vm,
fd_set *keepfd,
const char ***retargv,
@ -499,7 +499,6 @@ int umlBuildCommandLine(virConnectPtr conn,
ADD_ENV_COPY("LD_PRELOAD");
ADD_ENV_COPY("LD_LIBRARY_PATH");
ADD_ENV_COPY("PATH");
ADD_ENV_COPY("HOME");
ADD_ENV_COPY("USER");
ADD_ENV_COPY("LOGNAME");
ADD_ENV_COPY("TMPDIR");
@ -508,6 +507,7 @@ int umlBuildCommandLine(virConnectPtr conn,
//ADD_ARG_PAIR("con0", "fd:0,fd:1");
ADD_ARG_PAIR("mem", memory);
ADD_ARG_PAIR("umid", vm->def->name);
ADD_ARG_PAIR("uml_dir", driver->monitorDir);
if (vm->def->os.root)
ADD_ARG_PAIR("root", vm->def->os.root);