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authorLaszlo Ersek <lersek@redhat.com>2013-05-18 06:31:49 +0200
committerMichael Roth <mdroth@linux.vnet.ibm.com>2013-05-30 11:37:37 -0500
commitc394ecb7bf55b7234f852b9c8518aefb5d0943fa (patch)
tree10a3b8227ef14d3e785cb70acd7b401414ba9a6f /qga
parente2ea3515a9d2d747f91dadf361afcbeb57a71500 (diff)
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qga: determine default state dir and pidfile dynamically
No effective change on POSIX, but on Win32 the defaults come from the environment / session. Since commit 39097daf ("qemu-ga: use key-value store to avoid recycling fd handles after restart") we've relied on the state directory for the fd handles' key-value store. Even though we don't support the guest-file-* commands on win32 yet, the key-value store is written, and it's the first use of the state directory on win32. We should have a sensible default for its location. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Diffstat (limited to 'qga')
-rw-r--r--qga/main.c32
1 files changed, 26 insertions, 6 deletions
diff --git a/qga/main.c b/qga/main.c
index 44a2836..f5f033d 100644
--- a/qga/main.c
+++ b/qga/main.c
@@ -45,16 +45,21 @@
#ifndef _WIN32
#define QGA_VIRTIO_PATH_DEFAULT "/dev/virtio-ports/org.qemu.guest_agent.0"
+#define QGA_STATE_RELATIVE_DIR "run"
#else
#define QGA_VIRTIO_PATH_DEFAULT "\\\\.\\Global\\org.qemu.guest_agent.0"
+#define QGA_STATE_RELATIVE_DIR "qemu-ga"
#endif
-#define QGA_STATEDIR_DEFAULT CONFIG_QEMU_LOCALSTATEDIR "/run"
-#define QGA_PIDFILE_DEFAULT QGA_STATEDIR_DEFAULT "/qemu-ga.pid"
#ifdef CONFIG_FSFREEZE
#define QGA_FSFREEZE_HOOK_DEFAULT CONFIG_QEMU_CONFDIR "/fsfreeze-hook"
#endif
#define QGA_SENTINEL_BYTE 0xFF
+static struct {
+ const char *state_dir;
+ const char *pidfile;
+} dfl_pathnames;
+
typedef struct GAPersistentState {
#define QGA_PSTATE_DEFAULT_FD_COUNTER 1000
int64_t fd_counter;
@@ -106,6 +111,17 @@ DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
VOID WINAPI service_main(DWORD argc, TCHAR *argv[]);
#endif
+static void
+init_dfl_pathnames(void)
+{
+ g_assert(dfl_pathnames.state_dir == NULL);
+ g_assert(dfl_pathnames.pidfile == NULL);
+ dfl_pathnames.state_dir = qemu_get_local_state_pathname(
+ QGA_STATE_RELATIVE_DIR);
+ dfl_pathnames.pidfile = qemu_get_local_state_pathname(
+ QGA_STATE_RELATIVE_DIR G_DIR_SEPARATOR_S "qemu-ga.pid");
+}
+
static void quit_handler(int sig)
{
/* if we're frozen, don't exit unless we're absolutely forced to,
@@ -198,11 +214,11 @@ static void usage(const char *cmd)
" -h, --help display this help and exit\n"
"\n"
"Report bugs to <mdroth@linux.vnet.ibm.com>\n"
- , cmd, QEMU_VERSION, QGA_VIRTIO_PATH_DEFAULT, QGA_PIDFILE_DEFAULT,
+ , cmd, QEMU_VERSION, QGA_VIRTIO_PATH_DEFAULT, dfl_pathnames.pidfile,
#ifdef CONFIG_FSFREEZE
QGA_FSFREEZE_HOOK_DEFAULT,
#endif
- QGA_STATEDIR_DEFAULT);
+ dfl_pathnames.state_dir);
}
static const char *ga_log_level_str(GLogLevelFlags level)
@@ -908,11 +924,11 @@ int main(int argc, char **argv)
const char *sopt = "hVvdm:p:l:f:F::b:s:t:";
const char *method = NULL, *path = NULL;
const char *log_filepath = NULL;
- const char *pid_filepath = QGA_PIDFILE_DEFAULT;
+ const char *pid_filepath;
#ifdef CONFIG_FSFREEZE
const char *fsfreeze_hook = NULL;
#endif
- const char *state_dir = QGA_STATEDIR_DEFAULT;
+ const char *state_dir;
#ifdef _WIN32
const char *service = NULL;
#endif
@@ -942,6 +958,10 @@ int main(int argc, char **argv)
module_call_init(MODULE_INIT_QAPI);
+ init_dfl_pathnames();
+ pid_filepath = dfl_pathnames.pidfile;
+ state_dir = dfl_pathnames.state_dir;
+
while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
switch (ch) {
case 'm':