#include <config.h>
#define _BSD_SOURCE /* for mkdtemp, usleep */
-#define _GNU_SOURCE /* for vasprintf, GNU strerror_r */
+#define _GNU_SOURCE /* for vasprintf, GNU strerror_r, strchrnul */
#include <stdio.h>
#include <stdlib.h>
static void error (guestfs_h *g, const char *fs, ...);
static void perrorf (guestfs_h *g, const char *fs, ...);
-static void *safe_malloc (guestfs_h *g, int nbytes);
+static void *safe_malloc (guestfs_h *g, size_t nbytes);
static void *safe_realloc (guestfs_h *g, void *ptr, int nbytes);
static char *safe_strdup (guestfs_h *g, const char *str);
+static void *safe_memdup (guestfs_h *g, void *ptr, size_t size);
static void default_error_cb (guestfs_h *g, void *data, const char *msg);
-static void stdout_event (void *data, int watch, int fd, int events);
-static void sock_read_event (void *data, int watch, int fd, int events);
-static void sock_write_event (void *data, int watch, int fd, int events);
+static void stdout_event (struct guestfs_main_loop *ml, guestfs_h *g, void *data, int watch, int fd, int events);
+static void sock_read_event (struct guestfs_main_loop *ml, guestfs_h *g, void *data, int watch, int fd, int events);
+static void sock_write_event (struct guestfs_main_loop *ml, guestfs_h *g, void *data, int watch, int fd, int events);
-static int select_add_handle (guestfs_h *g, int fd, int events, guestfs_handle_event_cb cb, void *data);
-static int select_remove_handle (guestfs_h *g, int watch);
-static int select_add_timeout (guestfs_h *g, int interval, guestfs_handle_timeout_cb cb, void *data);
-static int select_remove_timeout (guestfs_h *g, int timer);
-static void select_main_loop_run (guestfs_h *g);
-static void select_main_loop_quit (guestfs_h *g);
+static void close_handles (void);
-#define UNIX_PATH_MAX 108
+static int select_add_handle (guestfs_main_loop *ml, guestfs_h *g, int fd, int events, guestfs_handle_event_cb cb, void *data);
+static int select_remove_handle (guestfs_main_loop *ml, guestfs_h *g, int watch);
+static int select_add_timeout (guestfs_main_loop *ml, guestfs_h *g, int interval, guestfs_handle_timeout_cb cb, void *data);
+static int select_remove_timeout (guestfs_main_loop *ml, guestfs_h *g, int timer);
+static int select_main_loop_run (guestfs_main_loop *ml, guestfs_h *g);
+static int select_main_loop_quit (guestfs_main_loop *ml, guestfs_h *g);
-/* Also in guestfsd.c */
-#define VMCHANNEL_PORT 6666
-#define VMCHANNEL_ADDR "10.0.2.4"
+/* Default select-based main loop. */
+struct select_handle_cb_data {
+ guestfs_handle_event_cb cb;
+ guestfs_h *g;
+ void *data;
+};
-/* Current main loop. */
-static guestfs_main_loop main_loop = {
+struct select_main_loop {
+ /* NB. These fields must be the same as in struct guestfs_main_loop: */
+ guestfs_add_handle_cb add_handle;
+ guestfs_remove_handle_cb remove_handle;
+ guestfs_add_timeout_cb add_timeout;
+ guestfs_remove_timeout_cb remove_timeout;
+ guestfs_main_loop_run_cb main_loop_run;
+ guestfs_main_loop_quit_cb main_loop_quit;
+
+ /* Additional private data: */
+ int is_running;
+
+ fd_set rset;
+ fd_set wset;
+ fd_set xset;
+
+ int max_fd;
+ int nr_fds;
+ struct select_handle_cb_data *handle_cb_data;
+};
+
+/* Default main loop. */
+static struct select_main_loop default_main_loop = {
.add_handle = select_add_handle,
.remove_handle = select_remove_handle,
.add_timeout = select_add_timeout,
.remove_timeout = select_remove_timeout,
.main_loop_run = select_main_loop_run,
.main_loop_quit = select_main_loop_quit,
+
+ /* XXX hopefully .rset, .wset, .xset are initialized to the empty
+ * set by the normal action of everything being initialized to zero.
+ */
+ .is_running = 0,
+ .max_fd = -1,
+ .nr_fds = 0,
+ .handle_cb_data = NULL,
};
+#define UNIX_PATH_MAX 108
+
+/* Also in guestfsd.c */
+#define VMCHANNEL_PORT 6666
+#define VMCHANNEL_ADDR "10.0.2.4"
+
/* GuestFS handle and connection. */
enum state { CONFIG, LAUNCHING, READY, BUSY, NO_HANDLE };
struct guestfs_h
{
+ struct guestfs_h *next; /* Linked list of open handles. */
+
/* State: see the state machine diagram in the man page guestfs(3). */
enum state state;
int cmdline_size;
int verbose;
+ int autosync;
+
+ const char *path;
+
+ char *last_error;
/* Callbacks. */
guestfs_abort_cb abort_cb;
guestfs_error_handler_cb error_cb;
void * error_cb_data;
+ guestfs_send_cb send_cb;
+ void * send_cb_data;
guestfs_reply_cb reply_cb;
void * reply_cb_data;
guestfs_log_message_cb log_message_cb;
guestfs_launch_done_cb launch_done_cb;
void * launch_done_cb_data;
- /* These callbacks are called before reply_cb and launch_done_cb,
- * and are used to implement the high-level API without needing to
- * interfere with callbacks that the user might have set.
+ /* These callbacks are called before send_cb, reply_cb and
+ * launch_done_cb, and are used to implement the high-level
+ * API without needing to interfere with callbacks that the
+ * user might have set.
*/
+ guestfs_send_cb send_cb_internal;
+ void * send_cb_internal_data;
guestfs_reply_cb reply_cb_internal;
void * reply_cb_internal_data;
guestfs_launch_done_cb launch_done_cb_internal;
void * launch_done_cb_internal_data;
+ /* Main loop used by this handle. */
+ guestfs_main_loop *main_loop;
+
/* Messages sent and received from the daemon. */
char *msg_in;
int msg_in_size, msg_in_allocated;
int msg_next_serial;
};
+static guestfs_h *handles = NULL;
+static int atexit_handler_set = 0;
+
guestfs_h *
guestfs_create (void)
{
str = getenv ("LIBGUESTFS_DEBUG");
g->verbose = str != NULL && strcmp (str, "1") == 0;
+ str = getenv ("LIBGUESTFS_PATH");
+ g->path = str != NULL ? str : GUESTFS_DEFAULT_PATH;
+ /* XXX We should probably make QEMU configurable as well. */
+
+ g->main_loop = (guestfs_main_loop *) &default_main_loop;
+
/* Start with large serial numbers so they are easy to spot
* inside the protocol.
*/
g->msg_next_serial = 0x00123400;
+ /* Link the handles onto a global list. This is the one area
+ * where the library needs to be made thread-safe. (XXX)
+ */
+ /* acquire mutex (XXX) */
+ g->next = handles;
+ handles = g;
+ if (!atexit_handler_set) {
+ atexit (close_handles);
+ atexit_handler_set = 1;
+ }
+ /* release mutex (XXX) */
+
+ if (g->verbose)
+ fprintf (stderr, "new guestfs handle %p\n", g);
+
return g;
}
{
int i;
char filename[256];
+ guestfs_h *gg;
if (g->state == NO_HANDLE) {
/* Not safe to call 'error' here, so ... */
return;
}
+ if (g->verbose)
+ fprintf (stderr, "closing guestfs handle %p (state %d)\n", g, g->state);
+
+ /* Try to sync if autosync flag is set. */
+ if (g->autosync && g->state == READY)
+ guestfs_sync (g);
+
/* Remove any handlers that might be called back before we kill the
* subprocess.
*/
/* Mark the handle as dead before freeing it. */
g->state = NO_HANDLE;
+ /* acquire mutex (XXX) */
+ if (handles == g)
+ handles = g->next;
+ else {
+ for (gg = handles; gg->next != g; gg = gg->next)
+ ;
+ gg->next = g->next;
+ }
+ /* release mutex (XXX) */
+
+ free (g->last_error);
free (g);
}
+/* Close all open handles (called from atexit(3)). */
+static void
+close_handles (void)
+{
+ while (handles) guestfs_close (handles);
+}
+
+const char *
+guestfs_last_error (guestfs_h *g)
+{
+ return g->last_error;
+}
+
+static void
+set_last_error (guestfs_h *g, const char *msg)
+{
+ free (g->last_error);
+ g->last_error = strdup (msg);
+}
+
static void
default_error_cb (guestfs_h *g, void *data, const char *msg)
{
va_list args;
char *msg;
- if (!g->error_cb) return;
-
va_start (args, fs);
vasprintf (&msg, fs, args);
va_end (args);
- g->error_cb (g, g->error_cb_data, msg);
+ if (g->error_cb) g->error_cb (g, g->error_cb_data, msg);
+ set_last_error (g, msg);
free (msg);
}
char *msg;
int err = errno;
- if (!g->error_cb) return;
-
va_start (args, fs);
vasprintf (&msg, fs, args);
va_end (args);
strcat (msg, ": ");
strcat (msg, buf);
- g->error_cb (g, g->error_cb_data, msg);
+ if (g->error_cb) g->error_cb (g, g->error_cb_data, msg);
+ set_last_error (g, msg);
free (msg);
}
static void *
-safe_malloc (guestfs_h *g, int nbytes)
+safe_malloc (guestfs_h *g, size_t nbytes)
{
void *ptr = malloc (nbytes);
if (!ptr) g->abort_cb ();
return s;
}
+static void *
+safe_memdup (guestfs_h *g, void *ptr, size_t size)
+{
+ void *p = malloc (size);
+ if (!p) g->abort_cb ();
+ memcpy (p, ptr, size);
+ return p;
+}
+
void
guestfs_set_out_of_memory_handler (guestfs_h *g, guestfs_abort_cb cb)
{
return g->error_cb;
}
-void
+int
guestfs_set_verbose (guestfs_h *g, int v)
{
- g->verbose = v;
+ g->verbose = !!v;
+ return 0;
}
int
return g->verbose;
}
+int
+guestfs_set_autosync (guestfs_h *g, int a)
+{
+ g->autosync = !!a;
+ return 0;
+}
+
+int
+guestfs_get_autosync (guestfs_h *g)
+{
+ return g->autosync;
+}
+
+int
+guestfs_set_path (guestfs_h *g, const char *path)
+{
+ if (path == NULL)
+ g->path = GUESTFS_DEFAULT_PATH;
+ else
+ g->path = path;
+ return 0;
+}
+
+const char *
+guestfs_get_path (guestfs_h *g)
+{
+ return g->path;
+}
+
/* Add a string to the current command line. */
static void
incr_cmdline_size (guestfs_h *g)
return -1;
}
+ if (access (filename, F_OK) == -1) {
+ perrorf (g, "%s", filename);
+ return -1;
+ }
+
snprintf (buf, len, "file=%s", filename);
return guestfs_config (g, "-drive", buf);
return -1;
}
+ if (access (filename, F_OK) == -1) {
+ perrorf (g, "%s", filename);
+ return -1;
+ }
+
return guestfs_config (g, "-cdrom", filename);
}
guestfs_launch (guestfs_h *g)
{
static const char *dir_template = "/tmp/libguestfsXXXXXX";
- int r, i;
+ int r, i, len, pmore;
int wfd[2], rfd[2];
int tries;
- /*const char *qemu = QEMU;*/ /* XXX */
- const char *qemu = "/usr/bin/qemu-system-x86_64";
- const char *kernel = "vmlinuz.fedora-10.x86_64";
- const char *initrd = "initramfs.fedora-10.x86_64.img";
+ const char *kernel_name = "vmlinuz." REPO "." host_cpu;
+ const char *initrd_name = "initramfs." REPO "." host_cpu ".img";
+ char *path, *pelem, *pend;
+ char *kernel = NULL, *initrd = NULL;
char unixsock[256];
struct sockaddr_un addr;
- /* XXX Choose which qemu to run. */
- /* XXX Choose initrd, etc. */
-
/* Configured? */
if (!g->cmdline) {
error (g, "you must call guestfs_add_drive before guestfs_launch");
return -1;
}
+ /* Search g->path for the kernel and initrd. */
+ pelem = path = safe_strdup (g, g->path);
+ do {
+ pend = strchrnul (pelem, ':');
+ pmore = *pend == ':';
+ *pend = '\0';
+ len = pend - pelem;
+
+ /* Empty element or "." means cwd. */
+ if (len == 0 || (len == 1 && *pelem == '.')) {
+ if (g->verbose)
+ fprintf (stderr,
+ "looking for kernel and initrd in current directory\n");
+ if (access (kernel_name, F_OK) == 0 && access (initrd_name, F_OK) == 0) {
+ kernel = safe_strdup (g, kernel_name);
+ initrd = safe_strdup (g, initrd_name);
+ break;
+ }
+ }
+ /* Look at <path>/kernel etc. */
+ else {
+ kernel = safe_malloc (g, len + strlen (kernel_name) + 2);
+ initrd = safe_malloc (g, len + strlen (initrd_name) + 2);
+ sprintf (kernel, "%s/%s", pelem, kernel_name);
+ sprintf (initrd, "%s/%s", pelem, initrd_name);
+
+ if (g->verbose)
+ fprintf (stderr, "looking for %s and %s\n", kernel, initrd);
+
+ if (access (kernel, F_OK) == 0 && access (initrd, F_OK) == 0)
+ break;
+ free (kernel);
+ free (initrd);
+ kernel = initrd = NULL;
+ }
+
+ pelem = pend + 1;
+ } while (pmore);
+
+ free (path);
+
+ if (kernel == NULL || initrd == NULL) {
+ error (g, "cannot find %s or %s on LIBGUESTFS_PATH (current path = %s)",
+ kernel_name, initrd_name, g->path);
+ goto cleanup0;
+ }
+
/* Make the temporary directory containing the socket. */
if (!g->tmpdir) {
g->tmpdir = safe_strdup (g, dir_template);
if (mkdtemp (g->tmpdir) == NULL) {
perrorf (g, "%s: cannot create temporary directory", dir_template);
- return -1;
+ goto cleanup0;
}
}
if (pipe (wfd) == -1 || pipe (rfd) == -1) {
perrorf (g, "pipe");
- return -1;
+ goto cleanup0;
}
r = fork ();
close (wfd[1]);
close (rfd[0]);
close (rfd[1]);
- return -1;
+ goto cleanup0;
}
if (r == 0) { /* Child (qemu). */
/* Set up the full command line. Do this in the subprocess so we
* don't need to worry about cleaning up.
*/
- g->cmdline[0] = (char *) qemu;
+ g->cmdline[0] = (char *) QEMU;
/* Construct the -net channel parameter for qemu. */
snprintf (vmchannel, sizeof vmchannel,
"console=ttyS0 guestfs=%s:%d", VMCHANNEL_ADDR, VMCHANNEL_PORT);
add_cmdline (g, "-m");
- add_cmdline (g, "384"); /* XXX Choose best size. */
+ add_cmdline (g, "384"); /* XXX Choose best size. */
+ add_cmdline (g, "-no-kqemu"); /* Avoids a warning. */
add_cmdline (g, "-kernel");
add_cmdline (g, (char *) kernel);
add_cmdline (g, "-initrd");
g->cmdline[g->cmdline_size-1] = NULL;
if (g->verbose) {
- fprintf (stderr, "%s", qemu);
+ fprintf (stderr, "%s", QEMU);
for (i = 0; g->cmdline[i]; ++i)
fprintf (stderr, " %s", g->cmdline[i]);
fprintf (stderr, "\n");
close (rfd[0]);
dup (wfd[0]);
dup (rfd[1]);
+ close (wfd[0]);
+ close (rfd[1]);
#if 0
/* Set up a new process group, so we can signal this process
setpgid (0, 0);
#endif
- execv (qemu, g->cmdline); /* Run qemu. */
- perror (qemu);
+ execv (QEMU, g->cmdline); /* Run qemu. */
+ perror (QEMU);
_exit (1);
}
g->msg_out_pos = 0;
g->stdout_watch =
- main_loop.add_handle (g, g->fd[1],
- GUESTFS_HANDLE_READABLE,
- stdout_event, g);
+ g->main_loop->add_handle (g->main_loop, g, g->fd[1],
+ GUESTFS_HANDLE_READABLE,
+ stdout_event, NULL);
if (g->stdout_watch == -1) {
error (g, "could not watch qemu stdout");
goto cleanup3;
}
g->sock_watch =
- main_loop.add_handle (g, g->sock,
- GUESTFS_HANDLE_READABLE,
- sock_read_event, g);
+ g->main_loop->add_handle (g->main_loop, g, g->sock,
+ GUESTFS_HANDLE_READABLE,
+ sock_read_event, NULL);
if (g->sock_watch == -1) {
error (g, "could not watch daemon communications socket");
goto cleanup3;
cleanup3:
if (g->stdout_watch >= 0)
- main_loop.remove_handle (g, g->stdout_watch);
+ g->main_loop->remove_handle (g->main_loop, g, g->stdout_watch);
if (g->sock_watch >= 0)
- main_loop.remove_handle (g, g->sock_watch);
+ g->main_loop->remove_handle (g->main_loop, g, g->sock_watch);
cleanup2:
close (g->sock);
g->start_t = 0;
g->stdout_watch = -1;
g->sock_watch = -1;
+
+ cleanup0:
+ free (kernel);
+ free (initrd);
return -1;
}
static void
finish_wait_ready (guestfs_h *g, void *vp)
{
+ if (g->verbose)
+ fprintf (stderr, "finish_wait_ready called, %p, vp = %p\n", g, vp);
+
*((int *)vp) = 1;
- main_loop.main_loop_quit (g);
+ g->main_loop->main_loop_quit (g->main_loop, g);
}
int
guestfs_wait_ready (guestfs_h *g)
{
- int r = 0;
+ int finished = 0, r;
if (g->state == READY) return 0;
}
g->launch_done_cb_internal = finish_wait_ready;
- g->launch_done_cb_internal_data = &r;
- main_loop.main_loop_run (g);
+ g->launch_done_cb_internal_data = &finished;
+ r = g->main_loop->main_loop_run (g->main_loop, g);
g->launch_done_cb_internal = NULL;
g->launch_done_cb_internal_data = NULL;
- if (r != 1) {
+ if (r == -1) return -1;
+
+ if (finished != 1) {
error (g, "guestfs_wait_ready failed, see earlier error messages");
return -1;
}
}
if (g->verbose)
- fprintf (stderr, "sending SIGTERM to process group %d\n", g->pid);
+ fprintf (stderr, "sending SIGTERM to process %d\n", g->pid);
kill (g->pid, SIGTERM);
* we see kernel messages here too.
*/
static void
-stdout_event (void *data, int watch, int fd, int events)
+stdout_event (struct guestfs_main_loop *ml, guestfs_h *g, void *data,
+ int watch, int fd, int events)
{
- guestfs_h *g = (guestfs_h *) data;
char buf[4096];
int n;
/*kill (g->pid, SIGTERM);*/
waitpid (g->pid, NULL, 0);
if (g->stdout_watch >= 0)
- main_loop.remove_handle (g, g->stdout_watch);
+ g->main_loop->remove_handle (g->main_loop, g, g->stdout_watch);
if (g->sock_watch >= 0)
- main_loop.remove_handle (g, g->sock_watch);
+ g->main_loop->remove_handle (g->main_loop, g, g->sock_watch);
close (g->fd[0]);
close (g->fd[1]);
close (g->sock);
* guestfsd (daemon inside the guest) communication socket.
*/
static void
-sock_read_event (void *data, int watch, int fd, int events)
+sock_read_event (struct guestfs_main_loop *ml, guestfs_h *g, void *data,
+ int watch, int fd, int events)
{
- guestfs_h *g = (guestfs_h *) data;
XDR xdr;
unsigned len;
int n;
goto cleanup;
}
+ /* Got the full message, begin processing it. */
+ if (g->verbose) {
+ int i, j;
+
+ for (i = 0; i < g->msg_in_size; i += 16) {
+ printf ("%04x: ", i);
+ for (j = i; j < MIN (i+16, g->msg_in_size); ++j)
+ printf ("%02x ", (unsigned char) g->msg_in[j]);
+ for (; j < i+16; ++j)
+ printf (" ");
+ printf ("|");
+ for (j = i; j < MIN (i+16, g->msg_in_size); ++j)
+ if (isprint (g->msg_in[j]))
+ printf ("%c", g->msg_in[j]);
+ else
+ printf (".");
+ for (; j < i+16; ++j)
+ printf (" ");
+ printf ("|\n");
+ }
+ }
+
/* Not in the expected state. */
if (g->state != BUSY)
error (g, "state %d != BUSY", g->state);
* guestfsd (daemon inside the guest) communication socket.
*/
static void
-sock_write_event (void *data, int watch, int fd, int events)
+sock_write_event (struct guestfs_main_loop *ml, guestfs_h *g, void *data,
+ int watch, int fd, int events)
{
- guestfs_h *g = (guestfs_h *) data;
int n;
if (g->verbose)
free (g->msg_out);
g->msg_out_pos = g->msg_out_size = 0;
- if (main_loop.remove_handle (g, g->sock_watch) == -1) {
+ if (g->main_loop->remove_handle (g->main_loop, g, g->sock_watch) == -1) {
error (g, "remove_handle failed in sock_write_event");
return;
}
g->sock_watch =
- main_loop.add_handle (g, g->sock,
- GUESTFS_HANDLE_READABLE,
- sock_read_event, g);
+ g->main_loop->add_handle (g->main_loop, g, g->sock,
+ GUESTFS_HANDLE_READABLE,
+ sock_read_event, NULL);
if (g->sock_watch == -1) {
error (g, "add_handle failed in sock_write_event");
return;
memcpy (g->msg_out + 4, buffer, len);
/* Change the handle to sock_write_event. */
- if (main_loop.remove_handle (g, g->sock_watch) == -1) {
+ if (g->main_loop->remove_handle (g->main_loop, g, g->sock_watch) == -1) {
error (g, "remove_handle failed in dispatch");
goto cleanup1;
}
g->sock_watch =
- main_loop.add_handle (g, g->sock,
- GUESTFS_HANDLE_WRITABLE,
- sock_write_event, g);
+ g->main_loop->add_handle (g->main_loop, g, g->sock,
+ GUESTFS_HANDLE_WRITABLE,
+ sock_write_event, NULL);
if (g->sock_watch == -1) {
error (g, "add_handle failed in dispatch");
goto cleanup1;
return -1;
}
+#if 0
+static int cancel = 0; /* XXX Implement file cancellation. */
+
+static int
+send_file (guestfs_h *g, const char *filename)
+{
+ char buf[GUESTFS_MAX_CHUNK_SIZE];
+ int fd, r;
+
+ fd = open (filename, O_RDONLY);
+ if (fd == -1) {
+ perrorf (g, "open: %s", filename);
+ send_file_cancellation (g);
+ /* Daemon sees cancellation and won't reply, so caller can
+ * just return here.
+ */
+ return -1;
+ }
+
+ /* Send file in chunked encoding. */
+ while (!cancel && (r = read (fd, buf, sizeof buf)) > 0) {
+ if (send_file_data (g, buf, r) == -1)
+ return -1;
+ }
+
+ if (cancel) {
+ send_file_cancellation (g);
+ return -1;
+ }
+
+ if (r == -1) {
+ perrorf (g, "read: %s", filename);
+ send_file_cancellation (g);
+ return -1;
+ }
+
+ /* End of file, but before we send that, we need to close
+ * the file and check for errors.
+ */
+ if (close (fd) == -1) {
+ perrorf (g, "close: %s", filename);
+ send_file_cancellation (g);
+ return -1;
+ }
+
+ return send_file_complete (g);
+}
+
+/* Send a chunk, cancellation or end of file, wait for it to go. */
+static int
+send_file_chunk (guestfs_h *g, int cancel, const char *buf, size_t len)
+{
+ void *data;
+ guestfs_chunk chunk;
+ XDR xdr;
+
+ if (g->state != BUSY) {
+ error (g, "send_file_chunk: state %d != READY", g->state);
+ return -1;
+ }
+
+ /* Serialize the chunk. */
+ chunk.cancel = cancel;
+ chunk.data.data_len = len;
+ chunk.data.data_val = (char *) buf;
+
+ data = safe_malloc (g, GUESTFS_MAX_CHUNK_SIZE + 48);
+ xdrmem_create (&xdr, data, GUESTFS_MAX_CHUNK_SIZE + 48, XDR_ENCODE);
+ if (xdr_guestfs_chunk (&xdr, &chunk)) {
+ error (g, "xdr_guestfs_chunk failed");
+ free (data);
+ return -1;
+ }
+
+ chunkdatalen = xdr_getpos (&xdr);
+ xdr_destroy (&xdr);
+
+ len = xdr_getpos (&xdr);
+ xdr_destroy (&xdr);
+
+ data = safe_realloc (g, data, len);
+ g->msg_out = data;
+ g->msg_out_size = len;
+ g->msg_out_pos = 0;
+
+ /* Change the handle to sock_write_event. */
+ if (g->main_loop->remove_handle (g->main_loop, g, g->sock_watch) == -1) {
+ error (g, "remove_handle failed in dispatch");
+ goto cleanup1;
+ }
+ g->sock_watch =
+ g->main_loop->add_handle (g->main_loop, g, g->sock,
+ GUESTFS_HANDLE_WRITABLE,
+ sock_write_event, NULL);
+ if (g->sock_watch == -1) {
+ error (g, "add_handle failed in dispatch");
+ goto cleanup1;
+ }
+
+ return 0;
+
+ cleanup1:
+ free (g->msg_out);
+ g->msg_out = NULL;
+ g->msg_out_size = 0;
+ g->state = READY;
+ return -1;
+}
+
+/* Send a chunk of file data. */
+static int
+send_file_data (guestfs_h *g, const char *buf, size_t len)
+{
+ return send_file_chunk (g, 0, buf, len);
+}
+
+/* Send a cancellation message. */
+static int
+send_file_cancellation (guestfs_h *g)
+{
+ char buf[1];
+ return send_file_chunk (g, 1, buf, 0);
+}
+
+/* Send a file complete chunk. */
+static int
+send_file_complete (guestfs_h *g)
+{
+ char buf[0];
+ return send_file_chunk (g, 0, buf, 0);
+}
+#endif
+
+/* Check the return message from a call for validity. */
+static int
+check_reply_header (guestfs_h *g,
+ const struct guestfs_message_header *hdr,
+ int proc_nr, int serial)
+{
+ if (hdr->prog != GUESTFS_PROGRAM) {
+ error (g, "wrong program (%d/%d)", hdr->prog, GUESTFS_PROGRAM);
+ return -1;
+ }
+ if (hdr->vers != GUESTFS_PROTOCOL_VERSION) {
+ error (g, "wrong protocol version (%d/%d)",
+ hdr->vers, GUESTFS_PROTOCOL_VERSION);
+ return -1;
+ }
+ if (hdr->direction != GUESTFS_DIRECTION_REPLY) {
+ error (g, "unexpected message direction (%d/%d)",
+ hdr->direction, GUESTFS_DIRECTION_REPLY);
+ return -1;
+ }
+ if (hdr->proc != proc_nr) {
+ error (g, "unexpected procedure number (%d/%d)", hdr->proc, proc_nr);
+ return -1;
+ }
+ if (hdr->serial != serial) {
+ error (g, "unexpected serial (%d/%d)", hdr->serial, serial);
+ return -1;
+ }
+
+ return 0;
+}
+
/* The high-level actions are autogenerated by generator.ml. Include
* them here.
*/
#include "guestfs-actions.c"
-/* This is the default main loop implementation, using select(2). */
-
-struct handle_cb_data {
- guestfs_handle_event_cb cb;
- void *data;
-};
+/* Structure-freeing functions. These rely on the fact that the
+ * structure format is identical to the XDR format. See note in
+ * generator.ml.
+ */
+void
+guestfs_free_int_bool (struct guestfs_int_bool *x)
+{
+ free (x);
+}
-static fd_set rset;
-static fd_set wset;
-static fd_set xset;
-static int select_init_done = 0;
-static int max_fd = -1;
-static int nr_fds = 0;
-static struct handle_cb_data *handle_cb_data = NULL;
+void
+guestfs_free_lvm_pv_list (struct guestfs_lvm_pv_list *x)
+{
+ xdr_free ((xdrproc_t) xdr_guestfs_lvm_int_pv_list, (char *) x);
+ free (x);
+}
-static void
-select_init (void)
+void
+guestfs_free_lvm_vg_list (struct guestfs_lvm_vg_list *x)
{
- if (!select_init_done) {
- FD_ZERO (&rset);
- FD_ZERO (&wset);
- FD_ZERO (&xset);
+ xdr_free ((xdrproc_t) xdr_guestfs_lvm_int_vg_list, (char *) x);
+ free (x);
+}
- select_init_done = 1;
- }
+void
+guestfs_free_lvm_lv_list (struct guestfs_lvm_lv_list *x)
+{
+ xdr_free ((xdrproc_t) xdr_guestfs_lvm_int_lv_list, (char *) x);
+ free (x);
}
+/* This is the default main loop implementation, using select(2). */
+
static int
-select_add_handle (guestfs_h *g, int fd, int events,
+select_add_handle (guestfs_main_loop *mlv, guestfs_h *g, int fd, int events,
guestfs_handle_event_cb cb, void *data)
{
- select_init ();
+ struct select_main_loop *ml = (struct select_main_loop *) mlv;
if (fd < 0 || fd >= FD_SETSIZE) {
error (g, "fd %d is out of range", fd);
return -1;
}
- if (FD_ISSET (fd, &rset) || FD_ISSET (fd, &wset) || FD_ISSET (fd, &xset)) {
+ if (FD_ISSET (fd, &ml->rset) ||
+ FD_ISSET (fd, &ml->wset) ||
+ FD_ISSET (fd, &ml->xset)) {
error (g, "fd %d is already registered", fd);
return -1;
}
}
if ((events & GUESTFS_HANDLE_READABLE))
- FD_SET (fd, &rset);
+ FD_SET (fd, &ml->rset);
if ((events & GUESTFS_HANDLE_WRITABLE))
- FD_SET (fd, &wset);
+ FD_SET (fd, &ml->wset);
if ((events & GUESTFS_HANDLE_HANGUP) || (events & GUESTFS_HANDLE_ERROR))
- FD_SET (fd, &xset);
+ FD_SET (fd, &ml->xset);
- if (fd > max_fd) {
- max_fd = fd;
- handle_cb_data = safe_realloc (g, handle_cb_data,
- sizeof (struct handle_cb_data) * (max_fd+1));
+ if (fd > ml->max_fd) {
+ ml->max_fd = fd;
+ ml->handle_cb_data =
+ safe_realloc (g, ml->handle_cb_data,
+ sizeof (struct select_handle_cb_data) * (ml->max_fd+1));
}
- handle_cb_data[fd].cb = cb;
- handle_cb_data[fd].data = data;
+ ml->handle_cb_data[fd].cb = cb;
+ ml->handle_cb_data[fd].g = g;
+ ml->handle_cb_data[fd].data = data;
- nr_fds++;
+ ml->nr_fds++;
/* Any integer >= 0 can be the handle, and this is as good as any ... */
return fd;
}
static int
-select_remove_handle (guestfs_h *g, int fd)
+select_remove_handle (guestfs_main_loop *mlv, guestfs_h *g, int fd)
{
- select_init ();
+ struct select_main_loop *ml = (struct select_main_loop *) mlv;
if (fd < 0 || fd >= FD_SETSIZE) {
error (g, "fd %d is out of range", fd);
return -1;
}
- if (!FD_ISSET (fd, &rset) && !FD_ISSET (fd, &wset) && !FD_ISSET (fd, &xset)) {
+ if (!FD_ISSET (fd, &ml->rset) &&
+ !FD_ISSET (fd, &ml->wset) &&
+ !FD_ISSET (fd, &ml->xset)) {
error (g, "fd %d was not registered", fd);
return -1;
}
- FD_CLR (fd, &rset);
- FD_CLR (fd, &wset);
- FD_CLR (fd, &xset);
+ FD_CLR (fd, &ml->rset);
+ FD_CLR (fd, &ml->wset);
+ FD_CLR (fd, &ml->xset);
- if (fd == max_fd) {
- max_fd--;
- handle_cb_data = safe_realloc (g, handle_cb_data,
- sizeof (struct handle_cb_data) * (max_fd+1));
+ if (fd == ml->max_fd) {
+ ml->max_fd--;
+ ml->handle_cb_data =
+ safe_realloc (g, ml->handle_cb_data,
+ sizeof (struct select_handle_cb_data) * (ml->max_fd+1));
}
- nr_fds--;
+ ml->nr_fds--;
return 0;
}
static int
-select_add_timeout (guestfs_h *g, int interval,
+select_add_timeout (guestfs_main_loop *mlv, guestfs_h *g, int interval,
guestfs_handle_timeout_cb cb, void *data)
{
- select_init ();
+ //struct select_main_loop *ml = (struct select_main_loop *) mlv;
abort (); /* XXX not implemented yet */
}
static int
-select_remove_timeout (guestfs_h *g, int timer)
+select_remove_timeout (guestfs_main_loop *mlv, guestfs_h *g, int timer)
{
- select_init ();
+ //struct select_main_loop *ml = (struct select_main_loop *) mlv;
abort (); /* XXX not implemented yet */
}
-/* Note that main loops can be nested. */
-static int level = 0;
-
-static void
-select_main_loop_run (guestfs_h *g)
+/* The 'g' parameter is just used for error reporting. Events
+ * for multiple handles can be dispatched by running the main
+ * loop.
+ */
+static int
+select_main_loop_run (guestfs_main_loop *mlv, guestfs_h *g)
{
- int old_level, fd, r, events;
+ struct select_main_loop *ml = (struct select_main_loop *) mlv;
+ int fd, r, events;
fd_set rset2, wset2, xset2;
- select_init ();
+ if (ml->is_running) {
+ error (g, "select_main_loop_run: this cannot be called recursively");
+ return -1;
+ }
+
+ ml->is_running = 1;
- old_level = level++;
- while (level > old_level) {
- if (nr_fds == 0) {
- level = old_level;
+ while (ml->is_running) {
+ if (ml->nr_fds == 0)
break;
- }
- rset2 = rset;
- wset2 = wset;
- xset2 = xset;
- r = select (max_fd+1, &rset2, &wset2, &xset2, NULL);
+ rset2 = ml->rset;
+ wset2 = ml->wset;
+ xset2 = ml->xset;
+ r = select (ml->max_fd+1, &rset2, &wset2, &xset2, NULL);
if (r == -1) {
perrorf (g, "select");
- level = old_level;
- break;
+ ml->is_running = 0;
+ return -1;
}
- for (fd = 0; r > 0 && fd <= max_fd; ++fd) {
+ for (fd = 0; r > 0 && fd <= ml->max_fd; ++fd) {
events = 0;
if (FD_ISSET (fd, &rset2))
events |= GUESTFS_HANDLE_READABLE;
events |= GUESTFS_HANDLE_ERROR | GUESTFS_HANDLE_HANGUP;
if (events) {
r--;
- handle_cb_data[fd].cb (handle_cb_data[fd].data,
- fd, fd, events);
+ ml->handle_cb_data[fd].cb ((guestfs_main_loop *) ml,
+ ml->handle_cb_data[fd].g,
+ ml->handle_cb_data[fd].data,
+ fd, fd, events);
}
}
}
+
+ ml->is_running = 0;
+ return 0;
}
-static void
-select_main_loop_quit (guestfs_h *g)
+static int
+select_main_loop_quit (guestfs_main_loop *mlv, guestfs_h *g)
{
- select_init ();
+ struct select_main_loop *ml = (struct select_main_loop *) mlv;
- if (level == 0) {
- error (g, "cannot quit, we are not in a main loop");
- return;
+ if (!ml->is_running) {
+ error (g, "cannot quit, we are not running in a main loop");
+ return -1;
}
- level--;
+ ml->is_running = 0;
+ return 0;
}
git.annexia.org / libguestfs.git / blobdiff