/* libguestfs
- * Copyright (C) 2009 Red Hat Inc.
+ * Copyright (C) 2009-2010 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
#include <config.h>
#define _BSD_SOURCE /* for mkdtemp, usleep */
-#define _GNU_SOURCE /* for vasprintf, GNU strerror_r, strchrnul */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <inttypes.h>
#include <unistd.h>
-#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
+#include <sys/stat.h>
#include <sys/select.h>
+#include <dirent.h>
+#include <assert.h>
+
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <sys/un.h>
#endif
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
+#include "glthread/lock.h"
+#include "hash.h"
+#include "hash-pjw.h"
+
#include "guestfs.h"
+#include "guestfs-internal.h"
+#include "guestfs-internal-actions.h"
#include "guestfs_protocol.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_realloc (guestfs_h *g, void *ptr, int nbytes);
-static char *safe_strdup (guestfs_h *g, const char *str);
-
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 close_handles (void);
-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);
-
-#define UNIX_PATH_MAX 108
-
-/* Also in guestfsd.c */
-#define VMCHANNEL_PORT 6666
-#define VMCHANNEL_ADDR "10.0.2.4"
-
-/* Current main loop. */
-static guestfs_main_loop 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,
-};
-
-/* 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 fd[2]; /* Stdin/stdout of qemu. */
- int sock; /* Daemon communications socket. */
- int pid; /* Qemu PID. */
- time_t start_t; /* The time when we started qemu. */
-
- int stdout_watch; /* Watches qemu stdout for log messages. */
- int sock_watch; /* Watches daemon comm socket. */
-
- char *tmpdir; /* Temporary directory containing socket. */
-
- char **cmdline; /* Qemu command line. */
- int cmdline_size;
-
- int verbose;
- int autosync;
-
- const char *path;
-
- /* Callbacks. */
- guestfs_abort_cb abort_cb;
- guestfs_error_handler_cb error_cb;
- void * error_cb_data;
- guestfs_reply_cb reply_cb;
- void * reply_cb_data;
- guestfs_log_message_cb log_message_cb;
- void * log_message_cb_data;
- guestfs_subprocess_quit_cb subprocess_quit_cb;
- void * subprocess_quit_cb_data;
- 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.
- */
- 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;
-
- /* Messages sent and received from the daemon. */
- char *msg_in;
- int msg_in_size, msg_in_allocated;
- char *msg_out;
- int msg_out_size, msg_out_pos;
-
- int msg_next_serial;
-};
-
+gl_lock_define_initialized (static, handles_lock);
static guestfs_h *handles = NULL;
static int atexit_handler_set = 0;
g->fd[0] = -1;
g->fd[1] = -1;
g->sock = -1;
- g->stdout_watch = -1;
- g->sock_watch = -1;
g->abort_cb = abort;
g->error_cb = default_error_cb;
g->error_cb_data = NULL;
+ g->recovery_proc = 1;
+
str = getenv ("LIBGUESTFS_DEBUG");
- g->verbose = str != NULL && strcmp (str, "1") == 0;
+ g->verbose = str != NULL && STREQ (str, "1");
+
+ str = getenv ("LIBGUESTFS_TRACE");
+ g->trace = str != NULL && STREQ (str, "1");
str = getenv ("LIBGUESTFS_PATH");
- g->path = str != NULL ? str : GUESTFS_DEFAULT_PATH;
- /* XXX We should probably make QEMU configurable as well. */
+ g->path = str != NULL ? strdup (str) : strdup (GUESTFS_DEFAULT_PATH);
+ if (!g->path) goto error;
+
+ str = getenv ("LIBGUESTFS_QEMU");
+ g->qemu = str != NULL ? strdup (str) : strdup (QEMU);
+ if (!g->qemu) goto error;
+
+ str = getenv ("LIBGUESTFS_APPEND");
+ if (str) {
+ g->append = strdup (str);
+ if (!g->append) goto error;
+ }
+
+ /* Choose a suitable memory size. Previously we tried to choose
+ * a minimal memory size, but this isn't really necessary since
+ * recent QEMU and KVM don't do anything nasty like locking
+ * memory into core any more. Thus we can safely choose a
+ * large, generous amount of memory, and it'll just get swapped
+ * on smaller systems.
+ */
+ str = getenv ("LIBGUESTFS_MEMSIZE");
+ if (str) {
+ if (sscanf (str, "%d", &g->memsize) != 1 || g->memsize <= 256) {
+ fprintf (stderr, "libguestfs: non-numeric or too small value for LIBGUESTFS_MEMSIZE\n");
+ goto error;
+ }
+ } else
+ g->memsize = 500;
/* 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) */
+ /* Link the handles onto a global list. */
+ gl_lock_lock (handles_lock);
g->next = handles;
handles = g;
if (!atexit_handler_set) {
atexit (close_handles);
atexit_handler_set = 1;
}
- /* release mutex (XXX) */
+ gl_lock_unlock (handles_lock);
if (g->verbose)
fprintf (stderr, "new guestfs handle %p\n", g);
return g;
+
+ error:
+ free (g->path);
+ free (g->qemu);
+ free (g->append);
+ free (g);
+ return NULL;
}
void
if (g->state == NO_HANDLE) {
/* Not safe to call 'error' here, so ... */
- fprintf (stderr, "guestfs_close: called twice on the same handle\n");
+ fprintf (stderr, _("guestfs_close: called twice on the same handle\n"));
return;
}
if (g->verbose)
fprintf (stderr, "closing guestfs handle %p (state %d)\n", g, g->state);
+ /* Run user close callback before anything else. */
+ if (g->close_cb)
+ g->close_cb (g, g->close_cb_data);
+
+ guestfs___free_inspect_info (g);
+
/* Try to sync if autosync flag is set. */
- if (g->autosync && g->state == READY)
+ if (g->autosync && g->state == READY) {
+ guestfs_umount_all (g);
guestfs_sync (g);
+ }
/* Remove any handlers that might be called back before we kill the
* subprocess.
if (g->state != CONFIG)
guestfs_kill_subprocess (g);
+ /* Close sockets. */
+ if (g->fd[0] >= 0)
+ close (g->fd[0]);
+ if (g->fd[1] >= 0)
+ close (g->fd[1]);
+ if (g->sock >= 0)
+ close (g->sock);
+ g->fd[0] = -1;
+ g->fd[1] = -1;
+ g->sock = -1;
+
+ /* Wait for subprocess(es) to exit. */
+ waitpid (g->pid, NULL, 0);
+ if (g->recoverypid > 0) waitpid (g->recoverypid, NULL, 0);
+
+ /* Remove tmpfiles. */
if (g->tmpdir) {
snprintf (filename, sizeof filename, "%s/sock", g->tmpdir);
unlink (filename);
/* Mark the handle as dead before freeing it. */
g->state = NO_HANDLE;
- /* acquire mutex (XXX) */
+ gl_lock_lock (handles_lock);
if (handles == g)
handles = g->next;
else {
;
gg->next = g->next;
}
- /* release mutex (XXX) */
+ gl_lock_unlock (handles_lock);
+ if (g->pda)
+ hash_free (g->pda);
+ free (g->last_error);
+ free (g->path);
+ free (g->qemu);
+ free (g->append);
+ free (g->qemu_help);
+ free (g->qemu_version);
free (g);
}
while (handles) guestfs_close (handles);
}
+const char *
+guestfs_last_error (guestfs_h *g)
+{
+ return g->last_error;
+}
+
static void
-default_error_cb (guestfs_h *g, void *data, const char *msg)
+set_last_error (guestfs_h *g, const char *msg)
{
- fprintf (stderr, "libguestfs: error: %s\n", msg);
+ free (g->last_error);
+ g->last_error = strdup (msg);
}
static void
-error (guestfs_h *g, const char *fs, ...)
+default_error_cb (guestfs_h *g, void *data, const char *msg)
+{
+ fprintf (stderr, _("libguestfs: error: %s\n"), msg);
+}
+
+void
+guestfs_error (guestfs_h *g, const char *fs, ...)
{
va_list args;
char *msg;
- if (!g->error_cb) return;
-
va_start (args, fs);
- vasprintf (&msg, fs, args);
+ int err = vasprintf (&msg, fs, args);
va_end (args);
- g->error_cb (g, g->error_cb_data, msg);
+ if (err < 0) return;
+
+ if (g->error_cb) g->error_cb (g, g->error_cb_data, msg);
+ set_last_error (g, msg);
free (msg);
}
-static void
-perrorf (guestfs_h *g, const char *fs, ...)
+void
+guestfs_perrorf (guestfs_h *g, const char *fs, ...)
{
va_list args;
char *msg;
- int err = errno;
-
- if (!g->error_cb) return;
+ int errnum = errno;
va_start (args, fs);
- vasprintf (&msg, fs, args);
+ int err = vasprintf (&msg, fs, args);
va_end (args);
-#ifndef _GNU_SOURCE
+ if (err < 0) return;
+
+#if !defined(_GNU_SOURCE) || defined(__APPLE__)
char buf[256];
- strerror_r (err, buf, sizeof buf);
+ strerror_r (errnum, buf, sizeof buf);
#else
char _buf[256];
char *buf;
- buf = strerror_r (err, _buf, sizeof _buf);
+ buf = strerror_r (errnum, _buf, sizeof _buf);
#endif
msg = safe_realloc (g, msg, strlen (msg) + 2 + strlen (buf) + 1);
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)
+void *
+guestfs_safe_malloc (guestfs_h *g, size_t nbytes)
{
void *ptr = malloc (nbytes);
- if (!ptr) g->abort_cb ();
+ if (nbytes > 0 && !ptr) g->abort_cb ();
return ptr;
}
-static void *
-safe_realloc (guestfs_h *g, void *ptr, int nbytes)
+/* Return 1 if an array of N objects, each of size S, cannot exist due
+ to size arithmetic overflow. S must be positive and N must be
+ nonnegative. This is a macro, not an inline function, so that it
+ works correctly even when SIZE_MAX < N.
+
+ By gnulib convention, SIZE_MAX represents overflow in size
+ calculations, so the conservative dividend to use here is
+ SIZE_MAX - 1, since SIZE_MAX might represent an overflowed value.
+ However, malloc (SIZE_MAX) fails on all known hosts where
+ sizeof (ptrdiff_t) <= sizeof (size_t), so do not bother to test for
+ exactly-SIZE_MAX allocations on such hosts; this avoids a test and
+ branch when S is known to be 1. */
+# define xalloc_oversized(n, s) \
+ ((size_t) (sizeof (ptrdiff_t) <= sizeof (size_t) ? -1 : -2) / (s) < (n))
+
+/* Technically we should add an autoconf test for this, testing for the desired
+ functionality, like what's done in gnulib, but for now, this is fine. */
+#if defined(__GLIBC__)
+#define HAVE_GNU_CALLOC (__GLIBC__ >= 2)
+#else
+#define HAVE_GNU_CALLOC 0
+#endif
+
+/* Allocate zeroed memory for N elements of S bytes, with error
+ checking. S must be nonzero. */
+void *
+guestfs_safe_calloc (guestfs_h *g, size_t n, size_t s)
+{
+ /* From gnulib's calloc function in xmalloc.c. */
+ void *p;
+ /* Test for overflow, since some calloc implementations don't have
+ proper overflow checks. But omit overflow and size-zero tests if
+ HAVE_GNU_CALLOC, since GNU calloc catches overflow and never
+ returns NULL if successful. */
+ if ((! HAVE_GNU_CALLOC && xalloc_oversized (n, s))
+ || (! (p = calloc (n, s)) && (HAVE_GNU_CALLOC || n != 0)))
+ g->abort_cb ();
+ return p;
+}
+
+void *
+guestfs_safe_realloc (guestfs_h *g, void *ptr, int nbytes)
{
void *p = realloc (ptr, nbytes);
- if (!p) g->abort_cb ();
+ if (nbytes > 0 && !p) g->abort_cb ();
return p;
}
-static char *
-safe_strdup (guestfs_h *g, const char *str)
+char *
+guestfs_safe_strdup (guestfs_h *g, const char *str)
{
char *s = strdup (str);
if (!s) g->abort_cb ();
return s;
}
+char *
+guestfs_safe_strndup (guestfs_h *g, const char *str, size_t n)
+{
+ char *s = strndup (str, n);
+ if (!s) g->abort_cb ();
+ return s;
+}
+
+void *
+guestfs_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
-guestfs_set_verbose (guestfs_h *g, int v)
+int
+guestfs__set_verbose (guestfs_h *g, int v)
{
- g->verbose = v;
+ g->verbose = !!v;
+ return 0;
}
int
-guestfs_get_verbose (guestfs_h *g)
+guestfs__get_verbose (guestfs_h *g)
{
return g->verbose;
}
-void
-guestfs_set_autosync (guestfs_h *g, int a)
+int
+guestfs__set_autosync (guestfs_h *g, int a)
{
- g->autosync = a;
+ g->autosync = !!a;
+ return 0;
}
int
-guestfs_get_autosync (guestfs_h *g)
+guestfs__get_autosync (guestfs_h *g)
{
return g->autosync;
}
-void
-guestfs_set_path (guestfs_h *g, const char *path)
+int
+guestfs__set_path (guestfs_h *g, const char *path)
{
- if (path == NULL)
- g->path = GUESTFS_DEFAULT_PATH;
- else
- g->path = path;
+ free (g->path);
+ g->path = NULL;
+
+ g->path =
+ path == NULL ?
+ safe_strdup (g, GUESTFS_DEFAULT_PATH) : safe_strdup (g, path);
+ return 0;
}
const char *
-guestfs_get_path (guestfs_h *g)
+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)
+int
+guestfs__set_qemu (guestfs_h *g, const char *qemu)
{
- if (g->cmdline == NULL) {
- /* g->cmdline[0] is reserved for argv[0], set in guestfs_launch. */
- g->cmdline_size = 1;
- g->cmdline = safe_malloc (g, sizeof (char *));
- g->cmdline[0] = NULL;
- }
+ free (g->qemu);
+ g->qemu = NULL;
- g->cmdline_size++;
- g->cmdline = safe_realloc (g, g->cmdline, sizeof (char *) * g->cmdline_size);
+ g->qemu = qemu == NULL ? safe_strdup (g, QEMU) : safe_strdup (g, qemu);
+ return 0;
}
-static int
-add_cmdline (guestfs_h *g, const char *str)
+const char *
+guestfs__get_qemu (guestfs_h *g)
{
- if (g->state != CONFIG) {
- error (g, "command line cannot be altered after qemu subprocess launched");
- return -1;
- }
-
- incr_cmdline_size (g);
- g->cmdline[g->cmdline_size-1] = safe_strdup (g, str);
- return 0;
+ return g->qemu;
}
int
-guestfs_config (guestfs_h *g,
- const char *qemu_param, const char *qemu_value)
+guestfs__set_append (guestfs_h *g, const char *append)
{
- if (qemu_param[0] != '-') {
- error (g, "guestfs_config: parameter must begin with '-' character");
- return -1;
- }
+ free (g->append);
+ g->append = NULL;
- /* A bit fascist, but the user will probably break the extra
- * parameters that we add if they try to set any of these.
- */
- if (strcmp (qemu_param, "-kernel") == 0 ||
- strcmp (qemu_param, "-initrd") == 0 ||
- strcmp (qemu_param, "-nographic") == 0 ||
- strcmp (qemu_param, "-serial") == 0 ||
- strcmp (qemu_param, "-vnc") == 0 ||
- strcmp (qemu_param, "-full-screen") == 0 ||
- strcmp (qemu_param, "-std-vga") == 0 ||
- strcmp (qemu_param, "-vnc") == 0) {
- error (g, "guestfs_config: parameter '%s' isn't allowed", qemu_param);
- return -1;
- }
-
- if (add_cmdline (g, qemu_param) != 0) return -1;
+ g->append = append ? safe_strdup (g, append) : NULL;
+ return 0;
+}
- if (qemu_value != NULL) {
- if (add_cmdline (g, qemu_value) != 0) return -1;
- }
+const char *
+guestfs__get_append (guestfs_h *g)
+{
+ return g->append;
+}
+int
+guestfs__set_memsize (guestfs_h *g, int memsize)
+{
+ g->memsize = memsize;
return 0;
}
int
-guestfs_add_drive (guestfs_h *g, const char *filename)
+guestfs__get_memsize (guestfs_h *g)
{
- int len = strlen (filename) + 64;
- char buf[len];
-
- if (strchr (filename, ',') != NULL) {
- error (g, "filename cannot contain ',' (comma) character");
- 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 g->memsize;
}
int
-guestfs_add_cdrom (guestfs_h *g, const char *filename)
+guestfs__set_selinux (guestfs_h *g, int selinux)
{
- if (strchr (filename, ',') != NULL) {
- error (g, "filename cannot contain ',' (comma) character");
- return -1;
- }
-
- if (access (filename, F_OK) == -1) {
- perrorf (g, "%s", filename);
- return -1;
- }
-
- return guestfs_config (g, "-cdrom", filename);
+ g->selinux = selinux;
+ return 0;
}
int
-guestfs_launch (guestfs_h *g)
+guestfs__get_selinux (guestfs_h *g)
{
- static const char *dir_template = "/tmp/libguestfsXXXXXX";
- int r, i, len, pmore;
- int wfd[2], rfd[2];
- int tries;
- 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;
-
- /* Configured? */
- if (!g->cmdline) {
- error (g, "you must call guestfs_add_drive before guestfs_launch");
- return -1;
- }
+ return g->selinux;
+}
- if (g->state != CONFIG) {
- error (g, "qemu has already been launched");
+int
+guestfs__get_pid (guestfs_h *g)
+{
+ if (g->pid > 0)
+ return g->pid;
+ else {
+ error (g, "get_pid: no qemu subprocess");
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);
- goto cleanup0;
- }
- }
-
- snprintf (unixsock, sizeof unixsock, "%s/sock", g->tmpdir);
- unlink (unixsock);
-
- if (pipe (wfd) == -1 || pipe (rfd) == -1) {
- perrorf (g, "pipe");
- goto cleanup0;
- }
-
- r = fork ();
- if (r == -1) {
- perrorf (g, "fork");
- close (wfd[0]);
- close (wfd[1]);
- close (rfd[0]);
- close (rfd[1]);
- goto cleanup0;
- }
-
- if (r == 0) { /* Child (qemu). */
- char vmchannel[256];
- char append[256];
-
- /* 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;
-
- /* Construct the -net channel parameter for qemu. */
- snprintf (vmchannel, sizeof vmchannel,
- "channel,%d:unix:%s,server,nowait",
- VMCHANNEL_PORT, unixsock);
-
- /* Linux kernel command line. */
- snprintf (append, sizeof append,
- "console=ttyS0 guestfs=%s:%d", VMCHANNEL_ADDR, VMCHANNEL_PORT);
-
- add_cmdline (g, "-m");
- 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");
- add_cmdline (g, (char *) initrd);
- add_cmdline (g, "-append");
- add_cmdline (g, append);
- add_cmdline (g, "-nographic");
- add_cmdline (g, "-serial");
- add_cmdline (g, "stdio");
- add_cmdline (g, "-net");
- add_cmdline (g, vmchannel);
- add_cmdline (g, "-net");
- add_cmdline (g, "user,vlan=0");
- add_cmdline (g, "-net");
- add_cmdline (g, "nic,vlan=0");
- incr_cmdline_size (g);
- g->cmdline[g->cmdline_size-1] = NULL;
-
- if (g->verbose) {
- fprintf (stderr, "%s", QEMU);
- for (i = 0; g->cmdline[i]; ++i)
- fprintf (stderr, " %s", g->cmdline[i]);
- fprintf (stderr, "\n");
- }
-
- /* Set up stdin, stdout. */
- close (0);
- close (1);
- close (wfd[1]);
- 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
- * and all subprocesses (eg. if qemu is really a shell script).
- */
- setpgid (0, 0);
-#endif
-
- execv (QEMU, g->cmdline); /* Run qemu. */
- perror (QEMU);
- _exit (1);
- }
-
- /* Parent (library). */
- g->pid = r;
-
- /* Start the clock ... */
- time (&g->start_t);
-
- /* Close the other ends of the pipe. */
- close (wfd[0]);
- close (rfd[1]);
-
- if (fcntl (wfd[1], F_SETFL, O_NONBLOCK) == -1 ||
- fcntl (rfd[0], F_SETFL, O_NONBLOCK) == -1) {
- perrorf (g, "fcntl");
- goto cleanup1;
- }
-
- g->fd[0] = wfd[1]; /* stdin of child */
- g->fd[1] = rfd[0]; /* stdout of child */
-
- /* Open the Unix socket. The vmchannel implementation that got
- * merged with qemu sucks in a number of ways. Both ends do
- * connect(2), which means that no one knows what, if anything, is
- * connected to the other end, or if it becomes disconnected. Even
- * worse, we have to wait some indeterminate time for qemu to create
- * the socket and connect to it (which happens very early in qemu's
- * start-up), so any code that uses vmchannel is inherently racy.
- * Hence this silly loop.
- */
- g->sock = socket (AF_UNIX, SOCK_STREAM, 0);
- if (g->sock == -1) {
- perrorf (g, "socket");
- goto cleanup1;
- }
-
- if (fcntl (g->sock, F_SETFL, O_NONBLOCK) == -1) {
- perrorf (g, "fcntl");
- goto cleanup2;
- }
-
- addr.sun_family = AF_UNIX;
- strncpy (addr.sun_path, unixsock, UNIX_PATH_MAX);
- addr.sun_path[UNIX_PATH_MAX-1] = '\0';
-
- tries = 100;
- while (tries > 0) {
- /* Always sleep at least once to give qemu a small chance to start up. */
- usleep (10000);
-
- r = connect (g->sock, (struct sockaddr *) &addr, sizeof addr);
- if ((r == -1 && errno == EINPROGRESS) || r == 0)
- goto connected;
-
- if (errno != ENOENT)
- perrorf (g, "connect");
- tries--;
- }
-
- error (g, "failed to connect to vmchannel socket");
- goto cleanup2;
-
- connected:
- /* Watch the file descriptors. */
- free (g->msg_in);
- g->msg_in = NULL;
- g->msg_in_size = g->msg_in_allocated = 0;
-
- free (g->msg_out);
- g->msg_out = NULL;
- g->msg_out_size = 0;
- g->msg_out_pos = 0;
-
- g->stdout_watch =
- main_loop.add_handle (g, g->fd[1],
- GUESTFS_HANDLE_READABLE,
- stdout_event, g);
- if (g->stdout_watch == -1) {
- error (g, "could not watch qemu stdout");
- goto cleanup3;
- }
+struct guestfs_version *
+guestfs__version (guestfs_h *g)
+{
+ struct guestfs_version *r;
- g->sock_watch =
- main_loop.add_handle (g, g->sock,
- GUESTFS_HANDLE_READABLE,
- sock_read_event, g);
- if (g->sock_watch == -1) {
- error (g, "could not watch daemon communications socket");
- goto cleanup3;
- }
+ r = safe_malloc (g, sizeof *r);
+ r->major = PACKAGE_VERSION_MAJOR;
+ r->minor = PACKAGE_VERSION_MINOR;
+ r->release = PACKAGE_VERSION_RELEASE;
+ r->extra = safe_strdup (g, PACKAGE_VERSION_EXTRA);
+ return r;
+}
- g->state = LAUNCHING;
+int
+guestfs__set_trace (guestfs_h *g, int t)
+{
+ g->trace = !!t;
return 0;
-
- cleanup3:
- if (g->stdout_watch >= 0)
- main_loop.remove_handle (g, g->stdout_watch);
- if (g->sock_watch >= 0)
- main_loop.remove_handle (g, g->sock_watch);
-
- cleanup2:
- close (g->sock);
-
- cleanup1:
- close (wfd[1]);
- close (rfd[0]);
- kill (g->pid, 9);
- waitpid (g->pid, NULL, 0);
- g->fd[0] = -1;
- g->fd[1] = -1;
- g->sock = -1;
- g->pid = 0;
- 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)
+int
+guestfs__get_trace (guestfs_h *g)
{
- *((int *)vp) = 1;
- main_loop.main_loop_quit (g);
+ return g->trace;
}
int
-guestfs_wait_ready (guestfs_h *g)
+guestfs__set_direct (guestfs_h *g, int d)
{
- int r = 0;
-
- if (g->state == READY) return 0;
-
- if (g->state == BUSY) {
- error (g, "qemu has finished launching already");
- return -1;
- }
-
- if (g->state != LAUNCHING) {
- error (g, "qemu has not been launched yet");
- return -1;
- }
-
- 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 = NULL;
- g->launch_done_cb_internal_data = NULL;
-
- if (r != 1) {
- error (g, "guestfs_wait_ready failed, see earlier error messages");
- return -1;
- }
-
- /* This is possible in some really strange situations, such as
- * guestfsd starts up OK but then qemu immediately exits. Check for
- * it because the caller is probably expecting to be able to send
- * commands after this function returns.
- */
- if (g->state != READY) {
- error (g, "qemu launched and contacted daemon, but state != READY");
- return -1;
- }
-
+ g->direct = !!d;
return 0;
}
int
-guestfs_kill_subprocess (guestfs_h *g)
+guestfs__get_direct (guestfs_h *g)
{
- if (g->state == CONFIG) {
- error (g, "no subprocess to kill");
- return -1;
- }
-
- if (g->verbose)
- fprintf (stderr, "sending SIGTERM to process %d\n", g->pid);
-
- kill (g->pid, SIGTERM);
+ return g->direct;
+}
+int
+guestfs__set_recovery_proc (guestfs_h *g, int f)
+{
+ g->recovery_proc = !!f;
return 0;
}
-/* This function is called whenever qemu prints something on stdout.
- * Qemu's stdout is also connected to the guest's serial console, so
- * we see kernel messages here too.
- */
-static void
-stdout_event (void *data, int watch, int fd, int events)
+int
+guestfs__get_recovery_proc (guestfs_h *g)
{
- guestfs_h *g = (guestfs_h *) data;
- char buf[4096];
- int n;
-
-#if 0
- if (g->verbose)
- fprintf (stderr,
- "stdout_event: %p g->state = %d, fd = %d, events = 0x%x\n",
- g, g->state, fd, events);
-#endif
-
- if (g->fd[1] != fd) {
- error (g, "stdout_event: internal error: %d != %d", g->fd[1], fd);
- return;
- }
-
- n = read (fd, buf, sizeof buf);
- if (n == 0) {
- /* Hopefully this indicates the qemu child process has died. */
- if (g->verbose)
- fprintf (stderr, "stdout_event: %p: child process died\n", g);
- /*kill (g->pid, SIGTERM);*/
- waitpid (g->pid, NULL, 0);
- if (g->stdout_watch >= 0)
- main_loop.remove_handle (g, g->stdout_watch);
- if (g->sock_watch >= 0)
- main_loop.remove_handle (g, g->sock_watch);
- close (g->fd[0]);
- close (g->fd[1]);
- close (g->sock);
- g->fd[0] = -1;
- g->fd[1] = -1;
- g->sock = -1;
- g->pid = 0;
- g->start_t = 0;
- g->stdout_watch = -1;
- g->sock_watch = -1;
- g->state = CONFIG;
- if (g->subprocess_quit_cb)
- g->subprocess_quit_cb (g, g->subprocess_quit_cb_data);
- return;
- }
-
- if (n == -1) {
- if (errno != EAGAIN)
- perrorf (g, "read");
- return;
- }
-
- /* In verbose mode, copy all log messages to stderr. */
- if (g->verbose)
- write (2, buf, n);
-
- /* It's an actual log message, send it upwards if anyone is listening. */
- if (g->log_message_cb)
- g->log_message_cb (g, g->log_message_cb_data, buf, n);
+ return g->recovery_proc;
}
-/* The function is called whenever we can read something on the
- * guestfsd (daemon inside the guest) communication socket.
- */
-static void
-sock_read_event (void *data, int watch, int fd, int events)
+int
+guestfs__set_network (guestfs_h *g, int v)
{
- guestfs_h *g = (guestfs_h *) data;
- XDR xdr;
- unsigned len;
- int n;
-
- if (g->verbose)
- fprintf (stderr,
- "sock_read_event: %p g->state = %d, fd = %d, events = 0x%x\n",
- g, g->state, fd, events);
-
- if (g->sock != fd) {
- error (g, "sock_read_event: internal error: %d != %d", g->sock, fd);
- return;
- }
-
- if (g->msg_in_size <= g->msg_in_allocated) {
- g->msg_in_allocated += 4096;
- g->msg_in = safe_realloc (g, g->msg_in, g->msg_in_allocated);
- }
- n = read (g->sock, g->msg_in + g->msg_in_size,
- g->msg_in_allocated - g->msg_in_size);
- if (n == 0)
- /* Disconnected? Ignore it because stdout_watch will get called
- * and will do the cleanup.
- */
- return;
-
- if (n == -1) {
- if (errno != EAGAIN)
- perrorf (g, "read");
- return;
- }
-
- g->msg_in_size += n;
-
- /* Have we got enough of a message to be able to process it yet? */
- if (g->msg_in_size < 4) return;
-
- xdrmem_create (&xdr, g->msg_in, g->msg_in_size, XDR_DECODE);
- if (!xdr_uint32_t (&xdr, &len)) {
- error (g, "can't decode length word");
- goto cleanup;
- }
-
- /* Length is normally the length of the message, but when guestfsd
- * starts up it sends a "magic" value (longer than any possible
- * message). Check for this.
- */
- if (len == 0xf5f55ff5) {
- if (g->state != LAUNCHING)
- error (g, "received magic signature from guestfsd, but in state %d",
- g->state);
- else if (g->msg_in_size != 4)
- error (g, "received magic signature from guestfsd, but msg size is %d",
- g->msg_in_size);
- else {
- g->state = READY;
- if (g->launch_done_cb_internal)
- g->launch_done_cb_internal (g, g->launch_done_cb_internal_data);
- if (g->launch_done_cb)
- g->launch_done_cb (g, g->launch_done_cb_data);
- }
-
- goto cleanup;
- }
-
- /* If this happens, it's pretty bad and we've probably lost synchronization.*/
- if (len > GUESTFS_MESSAGE_MAX) {
- error (g, "message length (%u) > maximum possible size (%d)",
- len, GUESTFS_MESSAGE_MAX);
- goto cleanup;
- }
-
- if (g->msg_in_size-4 < len) return; /* Need more of this message. */
-
- /* This should not happen, and if it does it probably means we've
- * lost all hope of synchronization.
- */
- if (g->msg_in_size-4 > len) {
- error (g, "len = %d, but msg_in_size-4 = %d", len, g->msg_in_size-4);
- goto cleanup;
- }
-
- /* Not in the expected state. */
- if (g->state != BUSY)
- error (g, "state %d != BUSY", g->state);
-
- /* Push the message up to the higher layer. Note that unlike
- * launch_done_cb / launch_done_cb_internal, we only call at
- * most one of the callback functions here.
- */
- g->state = READY;
- if (g->reply_cb_internal)
- g->reply_cb_internal (g, g->reply_cb_internal_data, &xdr);
- else if (g->reply_cb)
- g->reply_cb (g, g->reply_cb, &xdr);
-
- cleanup:
- /* Free the message buffer if it's grown excessively large. */
- if (g->msg_in_allocated > 65536) {
- free (g->msg_in);
- g->msg_in = NULL;
- g->msg_in_size = g->msg_in_allocated = 0;
- } else
- g->msg_in_size = 0;
-
- xdr_destroy (&xdr);
+ g->enable_network = !!v;
+ return 0;
}
-/* The function is called whenever we can write something on the
- * guestfsd (daemon inside the guest) communication socket.
- */
-static void
-sock_write_event (void *data, int watch, int fd, int events)
+int
+guestfs__get_network (guestfs_h *g)
{
- guestfs_h *g = (guestfs_h *) data;
- int n;
-
- if (g->verbose)
- fprintf (stderr,
- "sock_write_event: %p g->state = %d, fd = %d, events = 0x%x\n",
- g, g->state, fd, events);
-
- if (g->sock != fd) {
- error (g, "sock_write_event: internal error: %d != %d", g->sock, fd);
- return;
- }
-
- if (g->state != BUSY) {
- error (g, "sock_write_event: state %d != BUSY", g->state);
- return;
- }
-
- if (g->verbose)
- fprintf (stderr, "sock_write_event: writing %d bytes ...\n",
- g->msg_out_size - g->msg_out_pos);
-
- n = write (g->sock, g->msg_out + g->msg_out_pos,
- g->msg_out_size - g->msg_out_pos);
- if (n == -1) {
- if (errno != EAGAIN)
- perrorf (g, "write");
- return;
- }
-
- if (g->verbose)
- fprintf (stderr, "sock_write_event: wrote %d bytes\n", n);
-
- g->msg_out_pos += n;
-
- /* More to write? */
- if (g->msg_out_pos < g->msg_out_size)
- return;
-
- if (g->verbose)
- fprintf (stderr, "sock_write_event: done writing, switching back to reading events\n");
-
- free (g->msg_out);
- g->msg_out_pos = g->msg_out_size = 0;
-
- if (main_loop.remove_handle (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);
- if (g->sock_watch == -1) {
- error (g, "add_handle failed in sock_write_event");
- return;
- }
+ return g->enable_network;
}
-/* Dispatch a call to the remote daemon. This function just queues
- * the call in msg_out, to be sent when we next enter the main loop.
- * Returns -1 for error, or the message serial number.
- */
-static int
-dispatch (guestfs_h *g, int proc_nr, xdrproc_t xdrp, char *args)
+void
+guestfs_set_log_message_callback (guestfs_h *g,
+ guestfs_log_message_cb cb, void *opaque)
{
- char buffer[GUESTFS_MESSAGE_MAX];
- struct guestfs_message_header hdr;
- XDR xdr;
- unsigned len;
- int serial = g->msg_next_serial++;
-
- if (g->state != READY) {
- error (g, "dispatch: state %d != READY", g->state);
- return -1;
- }
-
- /* Serialize the header. */
- hdr.prog = GUESTFS_PROGRAM;
- hdr.vers = GUESTFS_PROTOCOL_VERSION;
- hdr.proc = proc_nr;
- hdr.direction = GUESTFS_DIRECTION_CALL;
- hdr.serial = serial;
- hdr.status = GUESTFS_STATUS_OK;
-
- xdrmem_create (&xdr, buffer, sizeof buffer, XDR_ENCODE);
- if (!xdr_guestfs_message_header (&xdr, &hdr)) {
- error (g, "xdr_guestfs_message_header failed");
- return -1;
- }
-
- /* Serialize the args. If any, because some message types
- * have no parameters.
- */
- if (xdrp) {
- if (!(*xdrp) (&xdr, args)) {
- error (g, "dispatch failed to marshal args");
- return -1;
- }
- }
-
- len = xdr_getpos (&xdr);
- xdr_destroy (&xdr);
-
- /* Allocate the outgoing message buffer. */
- g->msg_out = safe_malloc (g, len + 4);
-
- g->msg_out_size = len + 4;
- g->msg_out_pos = 0;
- g->state = BUSY;
-
- xdrmem_create (&xdr, g->msg_out, 4, XDR_ENCODE);
- if (!xdr_uint32_t (&xdr, &len)) {
- error (g, "xdr_uint32_t failed in dispatch");
- goto cleanup1;
- }
-
- memcpy (g->msg_out + 4, buffer, len);
-
- /* Change the handle to sock_write_event. */
- if (main_loop.remove_handle (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);
- if (g->sock_watch == -1) {
- error (g, "add_handle failed in dispatch");
- goto cleanup1;
- }
+ g->log_message_cb = cb;
+ g->log_message_cb_data = opaque;
+}
- return serial;
+void
+guestfs_set_subprocess_quit_callback (guestfs_h *g,
+ guestfs_subprocess_quit_cb cb, void *opaque)
+{
+ g->subprocess_quit_cb = cb;
+ g->subprocess_quit_cb_data = opaque;
+}
- cleanup1:
- free (g->msg_out);
- g->msg_out = NULL;
- g->msg_out_size = 0;
- g->state = READY;
- return -1;
+void
+guestfs_set_launch_done_callback (guestfs_h *g,
+ guestfs_launch_done_cb cb, void *opaque)
+{
+ g->launch_done_cb = cb;
+ g->launch_done_cb_data = opaque;
}
-/* 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)
+void
+guestfs_set_close_callback (guestfs_h *g,
+ guestfs_close_cb cb, void *opaque)
{
- 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;
- }
+ g->close_cb = cb;
+ g->close_cb_data = opaque;
+}
- return 0;
+void
+guestfs_set_progress_callback (guestfs_h *g,
+ guestfs_progress_cb cb, void *opaque)
+{
+ g->progress_cb = cb;
+ g->progress_cb_data = opaque;
}
-/* The high-level actions are autogenerated by generator.ml. Include
- * them here.
+/* Note the private data area is allocated lazily, since the vast
+ * majority of callers will never use it. This means g->pda is
+ * likely to be NULL.
*/
-#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;
+struct pda_entry {
+ char *key; /* key */
+ void *data; /* opaque user data pointer */
};
-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;
-
-static void
-select_init (void)
+static size_t
+hasher (void const *x, size_t table_size)
{
- if (!select_init_done) {
- FD_ZERO (&rset);
- FD_ZERO (&wset);
- FD_ZERO (&xset);
-
- select_init_done = 1;
- }
+ struct pda_entry const *p = x;
+ return hash_pjw (p->key, table_size);
}
-static int
-select_add_handle (guestfs_h *g, int fd, int events,
- guestfs_handle_event_cb cb, void *data)
+static bool
+comparator (void const *x, void const *y)
{
- select_init ();
-
- if (fd < 0 || fd >= FD_SETSIZE) {
- error (g, "fd %d is out of range", fd);
- return -1;
- }
-
- if ((events & ~(GUESTFS_HANDLE_READABLE |
- GUESTFS_HANDLE_WRITABLE |
- GUESTFS_HANDLE_HANGUP |
- GUESTFS_HANDLE_ERROR)) != 0) {
- error (g, "set of events (0x%x) contains unknown events", events);
- return -1;
- }
-
- if (events == 0) {
- error (g, "set of events is empty");
- return -1;
- }
-
- if (FD_ISSET (fd, &rset) || FD_ISSET (fd, &wset) || FD_ISSET (fd, &xset)) {
- error (g, "fd %d is already registered", fd);
- return -1;
- }
-
- if (cb == NULL) {
- error (g, "callback is NULL");
- return -1;
- }
-
- if ((events & GUESTFS_HANDLE_READABLE))
- FD_SET (fd, &rset);
- if ((events & GUESTFS_HANDLE_WRITABLE))
- FD_SET (fd, &wset);
- if ((events & GUESTFS_HANDLE_HANGUP) || (events & GUESTFS_HANDLE_ERROR))
- FD_SET (fd, &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));
- }
- handle_cb_data[fd].cb = cb;
- handle_cb_data[fd].data = data;
-
- nr_fds++;
-
- /* Any integer >= 0 can be the handle, and this is as good as any ... */
- return fd;
+ struct pda_entry const *a = x;
+ struct pda_entry const *b = y;
+ return STREQ (a->key, b->key);
}
-static int
-select_remove_handle (guestfs_h *g, int fd)
+static void
+freer (void *x)
{
- select_init ();
-
- 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)) {
- error (g, "fd %d was not registered", fd);
- return -1;
- }
-
- FD_CLR (fd, &rset);
- FD_CLR (fd, &wset);
- FD_CLR (fd, &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 (x) {
+ struct pda_entry *p = x;
+ free (p->key);
+ free (p);
}
-
- nr_fds--;
-
- return 0;
}
-static int
-select_add_timeout (guestfs_h *g, int interval,
- guestfs_handle_timeout_cb cb, void *data)
+void
+guestfs_set_private (guestfs_h *g, const char *key, void *data)
{
- select_init ();
+ if (g->pda == NULL) {
+ g->pda = hash_initialize (16, NULL, hasher, comparator, freer);
+ if (g->pda == NULL)
+ g->abort_cb ();
+ }
- abort (); /* XXX not implemented yet */
-}
+ struct pda_entry *new_entry = safe_malloc (g, sizeof *new_entry);
+ new_entry->key = safe_strdup (g, key);
+ new_entry->data = data;
-static int
-select_remove_timeout (guestfs_h *g, int timer)
-{
- select_init ();
+ struct pda_entry *old_entry = hash_delete (g->pda, new_entry);
+ freer (old_entry);
- abort (); /* XXX not implemented yet */
+ struct pda_entry *entry = hash_insert (g->pda, new_entry);
+ if (entry == NULL)
+ g->abort_cb ();
+ assert (entry == new_entry);
}
-/* Note that main loops can be nested. */
-static int level = 0;
-
-static void
-select_main_loop_run (guestfs_h *g)
+static inline char *
+bad_cast (char const *s)
{
- int old_level, fd, r, events;
- fd_set rset2, wset2, xset2;
-
- select_init ();
-
- old_level = level++;
- while (level > old_level) {
- if (nr_fds == 0) {
- level = old_level;
- break;
- }
-
- rset2 = rset;
- wset2 = wset;
- xset2 = xset;
- r = select (max_fd+1, &rset2, &wset2, &xset2, NULL);
- if (r == -1) {
- perrorf (g, "select");
- level = old_level;
- break;
- }
-
- for (fd = 0; r > 0 && fd <= max_fd; ++fd) {
- events = 0;
- if (FD_ISSET (fd, &rset2))
- events |= GUESTFS_HANDLE_READABLE;
- if (FD_ISSET (fd, &wset2))
- events |= GUESTFS_HANDLE_WRITABLE;
- if (FD_ISSET (fd, &xset2))
- events |= GUESTFS_HANDLE_ERROR | GUESTFS_HANDLE_HANGUP;
- if (events) {
- r--;
- handle_cb_data[fd].cb (handle_cb_data[fd].data,
- fd, fd, events);
- }
- }
- }
+ return (char *) s;
}
-static void
-select_main_loop_quit (guestfs_h *g)
+void *
+guestfs_get_private (guestfs_h *g, const char *key)
{
- select_init ();
-
- if (level == 0) {
- error (g, "cannot quit, we are not in a main loop");
- return;
- }
+ if (g->pda == NULL)
+ return NULL; /* no keys have been set */
- level--;
+ const struct pda_entry k = { .key = bad_cast (key) };
+ struct pda_entry *entry = hash_lookup (g->pda, &k);
+ if (entry)
+ return entry->data;
+ else
+ return NULL;
}
git.annexia.org / libguestfs.git / blobdiff