[libvirt] [PATCH RFC] virhook: adding virHookCheck() inside virHookCall().

This commit introduces the virHookCheck() before running the command (hook). The virHookCheck() before virCommandRun() will avoid errors with changes (removal and other permissions changes) in the hook file, while the libvirt daemon is running. Now, when you remove the hook file while libvirtd is running you get the following error: virsh # start WINDOWS_7 error: Failed to start domain WINDOWS_7 error: Hook script execution failed: internal error: Child process (LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOME=/home/julio USER=root LOGNAME=root /etc/libvirt/hooks/qemu WINDOWS_7 prepare begin -) unexpected exit status 127: libvirt: error : cannot execute binary /etc/libvirt/hooks/qemu: No such file or directory Cc: Carlos Castilho <ccast(a)br.ibm.com&gt; Signed-off-by: Julio Faracco <jcfaracco(a)gmail.com&gt; --- src/util/virhook.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/util/virhook.c b/src/util/virhook.c index d37d6da..f741b30 100644 --- a/src/util/virhook.c +++ b/src/util/virhook.c @@ -294,7 +294,12 @@ virHookCall(int driver, if (output) virCommandSetOutputBuffer(cmd, output); - ret = virCommandRun(cmd, NULL); + ret = virHookCheck(driver, virHookDriverTypeToString(driver)); + + if (ret > 0) { + ret = virCommandRun(cmd, NULL); + } + if (ret < 0) { /* Convert INTERNAL_ERROR into known error. */ virReportError(VIR_ERR_HOOK_SCRIPT_FAILED, "%s", -- 1.9.1