/* 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 <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>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#include <sys/un.h>
#endif
-#include "guestfs.h"
-
-static int error (guestfs_h *g, const char *fs, ...);
-static int 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);
+#include <arpa/inet.h>
+#include <netinet/in.h>
-/* GuestFS handle and connection. */
-struct guestfs_h
-{
- /* All these socks/pids are -1 if not connected. */
- int sock; /* Daemon communications socket. */
- int pid; /* Qemu PID. */
+#include "c-ctype.h"
+#include "glthread/lock.h"
+#include "hash.h"
+#include "hash-pjw.h"
- char *tmpdir; /* Temporary directory containing logfile
- * and socket. Cleaned up unless there is
- * an error.
- */
+#include "guestfs.h"
+#include "guestfs-internal.h"
+#include "guestfs-internal-actions.h"
+#include "guestfs_protocol.h"
- char **cmdline; /* Qemu command line. */
- int cmdline_size;
+static void default_error_cb (guestfs_h *g, void *data, const char *msg);
+static void close_handles (void);
- guestfs_abort_fn abort_fn;
- int exit_on_error;
- int verbose;
-};
+gl_lock_define_initialized (static, handles_lock);
+static guestfs_h *handles = NULL;
+static int atexit_handler_set = 0;
guestfs_h *
guestfs_create (void)
{
guestfs_h *g;
+ const char *str;
g = malloc (sizeof (*g));
if (!g) return NULL;
+ memset (g, 0, sizeof (*g));
+
+ g->state = CONFIG;
+
+ g->fd[0] = -1;
+ g->fd[1] = -1;
g->sock = -1;
- g->pid = -1;
- g->tmpdir = NULL;
+ g->abort_cb = abort;
+ g->error_cb = default_error_cb;
+ g->error_cb_data = NULL;
+
+ g->recovery_proc = 1;
+ g->autosync = 1;
+
+ str = getenv ("LIBGUESTFS_DEBUG");
+ 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 ? 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;
+ }
- g->abort_fn = abort; /* Have to set these before safe_malloc. */
- g->exit_on_error = 0;
- g->verbose = getenv ("LIBGUESTFS_VERBOSE") != NULL;
+ /* 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;
- g->cmdline = safe_malloc (g, sizeof (char *) * 1);
- g->cmdline_size = 1;
- g->cmdline[0] = NULL; /* This is chosen by guestfs_launch. */
+ /* 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. */
+ gl_lock_lock (handles_lock);
+ g->next = handles;
+ handles = g;
+ if (!atexit_handler_set) {
+ atexit (close_handles);
+ atexit_handler_set = 1;
+ }
+ 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
-guestfs_free (guestfs_h *g)
+guestfs_close (guestfs_h *g)
{
int i;
char filename[256];
+ guestfs_h *gg;
+
+ if (g->state == NO_HANDLE) {
+ /* Not safe to call 'error' here, so ... */
+ 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);
- if (g->pid) guestfs_kill_subprocess (g);
+ /* 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) {
+ guestfs_umount_all (g);
+ guestfs_sync (g);
+ }
- /* The assumption is that programs calling this have successfully
- * used qemu, so delete the logfile and socket directory.
+ /* Remove any handlers that might be called back before we kill the
+ * subprocess.
*/
+ g->log_message_cb = NULL;
+
+ 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);
- snprintf (filename, sizeof filename, "%s/qemu.log", g->tmpdir);
- unlink (filename);
-
rmdir (g->tmpdir);
free (g->tmpdir);
}
- for (i = 0; i < g->cmdline_size; ++i)
- free (g->cmdline[i]);
- free (g->cmdline);
+ if (g->cmdline) {
+ for (i = 0; i < g->cmdline_size; ++i)
+ free (g->cmdline[i]);
+ free (g->cmdline);
+ }
+
+ /* Mark the handle as dead before freeing it. */
+ g->state = NO_HANDLE;
+ gl_lock_lock (handles_lock);
+ if (handles == g)
+ handles = g->next;
+ else {
+ for (gg = handles; gg->next != g; gg = gg->next)
+ ;
+ gg->next = g->next;
+ }
+ 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);
}
-/* Cleanup fds and sockets, assuming the subprocess is dead already. */
+/* Close all open handles (called from atexit(3)). */
static void
-cleanup_fds (guestfs_h *g)
+close_handles (void)
{
- if (g->sock >= 0) close (g->sock);
- g->sock = -1;
+ while (handles) guestfs_close (handles);
+}
+
+const char *
+guestfs_last_error (guestfs_h *g)
+{
+ return g->last_error;
+}
+
+int
+guestfs_last_errno (guestfs_h *g)
+{
+ return g->last_errnum;
}
-/* Wait for subprocess to exit. */
static void
-wait_subprocess (guestfs_h *g)
+set_last_error (guestfs_h *g, int errnum, const char *msg)
{
- if (g->pid >= 0) waitpid (g->pid, NULL, 0);
- g->pid = -1;
+ free (g->last_error);
+ g->last_error = strdup (msg);
+ g->last_errnum = errnum;
}
-static int
-error (guestfs_h *g, const char *fs, ...)
+static void
+default_error_cb (guestfs_h *g, void *data, const char *msg)
+{
+ fprintf (stderr, _("libguestfs: error: %s\n"), msg);
+}
+
+void
+guestfs_error_errno (guestfs_h *g, int errnum, const char *fs, ...)
{
va_list args;
+ char *msg;
- fprintf (stderr, "libguestfs: ");
va_start (args, fs);
- vfprintf (stderr, fs, args);
+ int err = vasprintf (&msg, fs, args);
va_end (args);
- fputc ('\n', stderr);
- if (g->exit_on_error) exit (1);
- return -1;
+ if (err < 0) return;
+
+ /* set_last_error first so that the callback can access the error
+ * message and errno through the handle if it wishes.
+ */
+ set_last_error (g, errnum, msg);
+ if (g->error_cb) g->error_cb (g, g->error_cb_data, msg);
+
+ free (msg);
}
-static int
-perrorf (guestfs_h *g, const char *fs, ...)
+void
+guestfs_perrorf (guestfs_h *g, const char *fs, ...)
{
va_list args;
- char buf[256];
- int err = errno;
+ char *msg;
+ int errnum = errno;
- fprintf (stderr, "libguestfs: ");
va_start (args, fs);
- vfprintf (stderr, fs, args);
+ int err = vasprintf (&msg, fs, args);
va_end (args);
- strerror_r (err, buf, sizeof buf);
- fprintf (stderr, ": %s\n", buf);
- if (g->exit_on_error) exit (1);
- return -1;
+ if (err < 0) return;
+
+#if !defined(_GNU_SOURCE) || defined(__APPLE__)
+ char buf[256];
+ strerror_r (errnum, buf, sizeof buf);
+#else
+ char _buf[256];
+ char *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);
+
+ /* set_last_error first so that the callback can access the error
+ * message and errno through the handle if it wishes.
+ */
+ set_last_error (g, errnum, msg);
+ if (g->error_cb) g->error_cb (g, g->error_cb_data, 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_fn ();
+ 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_fn ();
+ 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_fn ();
+ 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;
+}
+
+char *
+guestfs_safe_asprintf (guestfs_h *g, const char *fs, ...)
+{
+ va_list args;
+ char *msg;
+
+ va_start (args, fs);
+ int err = vasprintf (&msg, fs, args);
+ va_end (args);
+
+ if (err == -1)
+ g->abort_cb ();
+
+ return msg;
+}
+
void
-guestfs_set_out_of_memory_handler (guestfs_h *g, guestfs_abort_fn a)
+guestfs_set_out_of_memory_handler (guestfs_h *g, guestfs_abort_cb cb)
{
- g->abort_fn = a;
+ g->abort_cb = cb;
}
-guestfs_abort_fn
+guestfs_abort_cb
guestfs_get_out_of_memory_handler (guestfs_h *g)
{
- return g->abort_fn;
+ return g->abort_cb;
}
void
-guestfs_set_exit_on_error (guestfs_h *g, int e)
+guestfs_set_error_handler (guestfs_h *g, guestfs_error_handler_cb cb, void *data)
{
- g->exit_on_error = e;
+ g->error_cb = cb;
+ g->error_cb_data = data;
}
-int
-guestfs_get_exit_on_error (guestfs_h *g)
+guestfs_error_handler_cb
+guestfs_get_error_handler (guestfs_h *g, void **data_rtn)
{
- return g->exit_on_error;
+ if (data_rtn) *data_rtn = g->error_cb_data;
+ 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;
}
-/* Add an escaped string to the current command line. */
-static int
-add_cmdline (guestfs_h *g, const char *str)
+int
+guestfs__set_autosync (guestfs_h *g, int a)
{
- if (g->pid >= 0)
- return error (g, "command line cannot be altered after qemu subprocess launched");
-
- g->cmdline_size++;
- g->cmdline = safe_realloc (g, g->cmdline, sizeof (char *) * g->cmdline_size);
- g->cmdline[g->cmdline_size-1] = safe_strdup (g, str);
-
+ g->autosync = !!a;
return 0;
}
int
-guestfs_config (guestfs_h *g,
- const char *qemu_param, const char *qemu_value)
+guestfs__get_autosync (guestfs_h *g)
{
- if (qemu_param[0] != '-')
- return error (g, "guestfs_config: parameter must begin with '-' character");
+ return g->autosync;
+}
- /* 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)
- return error (g, "guestfs_config: parameter '%s' isn't allowed");
-
- if (add_cmdline (g, qemu_param) != 0) return -1;
-
- if (qemu_value != NULL) {
- if (add_cmdline (g, qemu_value) != 0) return -1;
- }
+int
+guestfs__set_path (guestfs_h *g, const char *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)
+{
+ return g->path;
+}
+
int
-guestfs_add_drive (guestfs_h *g, const char *filename)
+guestfs__set_qemu (guestfs_h *g, const char *qemu)
{
- int len = strlen (filename) + 64;
- char buf[len];
+ free (g->qemu);
+ g->qemu = NULL;
- if (strchr (filename, ',') != NULL)
- return error (g, "filename cannot contain ',' (comma) character");
+ g->qemu = qemu == NULL ? safe_strdup (g, QEMU) : safe_strdup (g, qemu);
+ return 0;
+}
+
+const char *
+guestfs__get_qemu (guestfs_h *g)
+{
+ return g->qemu;
+}
+
+int
+guestfs__set_append (guestfs_h *g, const char *append)
+{
+ free (g->append);
+ g->append = NULL;
- snprintf (buf, len, "file=%s,media=disk", filename);
+ g->append = append ? safe_strdup (g, append) : NULL;
+ return 0;
+}
- return guestfs_config (g, "-drive", buf);
+const char *
+guestfs__get_append (guestfs_h *g)
+{
+ return g->append;
}
int
-guestfs_add_cdrom (guestfs_h *g, const char *filename)
+guestfs__set_memsize (guestfs_h *g, int memsize)
{
- int len = strlen (filename) + 64;
- char buf[len];
+ g->memsize = memsize;
+ return 0;
+}
- if (strchr (filename, ',') != NULL)
- return error (g, "filename cannot contain ',' (comma) character");
+int
+guestfs__get_memsize (guestfs_h *g)
+{
+ return g->memsize;
+}
- snprintf (buf, len, "file=%s,if=ide,index=1,media=cdrom", filename);
+int
+guestfs__set_selinux (guestfs_h *g, int selinux)
+{
+ g->selinux = selinux;
+ return 0;
+}
- return guestfs_config (g, "-drive", buf);
+int
+guestfs__get_selinux (guestfs_h *g)
+{
+ return g->selinux;
}
int
-guestfs_launch (guestfs_h *g)
-{
- static const char *dir_template = "/tmp/libguestfsXXXXXX";
- int r, i;
- const char *qemu = QEMU; /* XXX */
- const char *kernel = "/boot/vmlinuz-2.6.27.15-170.2.24.fc10.x86_64";
- const char *initrd = "/boot/initrd-2.6.27.15-170.2.24.fc10.x86_64.img";
- char unixsock[256];
- char vmchannel[256];
- char tmpfile[256];
-
- /* XXX Choose which qemu to run. */
- /* XXX Choose initrd, etc. */
-
- /* Make the temporary directory containing the logfile and socket. */
- if (!g->tmpdir) {
- g->tmpdir = safe_strdup (g, dir_template);
- if (mkdtemp (g->tmpdir) == NULL)
- return perrorf (g, "%s: cannot create temporary directory", dir_template);
-
- snprintf (unixsock, sizeof unixsock, "%s/sock", g->tmpdir);
+guestfs__get_pid (guestfs_h *g)
+{
+ if (g->pid > 0)
+ return g->pid;
+ else {
+ error (g, "get_pid: no qemu subprocess");
+ return -1;
}
+}
- r = fork ();
- if (r == -1)
- return perrorf (g, "fork");
-
- if (r > 0) { /* Parent (library). */
- g->pid = r;
-
- /* If qemu is going to die during startup, give it a tiny amount of
- * time to print the error message.
- */
- usleep (10000);
- } else { /* 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 = realloc (g->cmdline, sizeof (char *) * (g->cmdline_size + 14));
- if (g->cmdline == NULL) {
- perror ("realloc");
- _exit (1);
- }
+struct guestfs_version *
+guestfs__version (guestfs_h *g)
+{
+ struct guestfs_version *r;
+
+ 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;
+}
- snprintf (vmchannel, sizeof vmchannel,
- "channel,%d:unix:%s,server,nowait", 666, unixsock);
-
- g->cmdline[g->cmdline_size ] = "-kernel";
- g->cmdline[g->cmdline_size+ 1] = (char *) kernel;
- g->cmdline[g->cmdline_size+ 2] = "-initrd";
- g->cmdline[g->cmdline_size+ 3] = (char *) initrd;
- g->cmdline[g->cmdline_size+ 4] = "-append";
- g->cmdline[g->cmdline_size+ 5] = "console=ttyS0";
- g->cmdline[g->cmdline_size+ 6] = "-nographic";
- g->cmdline[g->cmdline_size+ 7] = "-serial";
- g->cmdline[g->cmdline_size+ 8] = "stdio";
- g->cmdline[g->cmdline_size+ 9] = "-net";
- g->cmdline[g->cmdline_size+10] = vmchannel;
- g->cmdline[g->cmdline_size+11] = "-net";
- g->cmdline[g->cmdline_size+12] = "user,vlan0";
- g->cmdline[g->cmdline_size+13] = NULL;
-
- if (g->verbose) {
- fprintf (stderr, "Running %s", qemu);
- for (i = 0; g->cmdline[i]; ++i)
- fprintf (stderr, " %s", g->cmdline[i]);
- fprintf (stderr, "\n");
- }
+int
+guestfs__set_trace (guestfs_h *g, int t)
+{
+ g->trace = !!t;
+ return 0;
+}
- /* Set up stdin, stdout. Messages should go to the logfile. */
- close (0);
- close (1);
- open ("/dev/null", O_RDONLY);
- snprintf (tmpfile, sizeof tmpfile, "%s/qemu.log", g->tmpdir);
- open (tmpfile, O_WRONLY|O_CREAT|O_APPEND, 0644);
- /*dup2 (1, 2);*/
-
- execv (qemu, g->cmdline); /* Run qemu. */
- perror (qemu);
- _exit (1);
- }
+int
+guestfs__get_trace (guestfs_h *g)
+{
+ return g->trace;
+}
+int
+guestfs__set_direct (guestfs_h *g, int d)
+{
+ g->direct = !!d;
return 0;
}
-#define UNIX_PATH_MAX 108
+int
+guestfs__get_direct (guestfs_h *g)
+{
+ return g->direct;
+}
int
-guestfs_wait_ready (guestfs_h *g)
+guestfs__set_recovery_proc (guestfs_h *g, int f)
{
- int r, i, lsock;
- struct sockaddr_un addr;
+ g->recovery_proc = !!f;
+ return 0;
+}
- if (guestfs_ready (g)) return 0;
+int
+guestfs__get_recovery_proc (guestfs_h *g)
+{
+ return g->recovery_proc;
+}
- /* Launch the subprocess, if there isn't one already. */
- if (g->pid == -1) {
- if (guestfs_launch (g) != 0)
- return -1;
- }
+int
+guestfs__set_network (guestfs_h *g, int v)
+{
+ g->enable_network = !!v;
+ return 0;
+}
- if (g->sock >= 0) {
- close (g->sock);
- g->sock = -1;
- }
+int
+guestfs__get_network (guestfs_h *g)
+{
+ return g->enable_network;
+}
+
+void
+guestfs_set_log_message_callback (guestfs_h *g,
+ guestfs_log_message_cb cb, void *opaque)
+{
+ g->log_message_cb = cb;
+ g->log_message_cb_data = opaque;
+}
+
+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;
+}
- lsock = socket (AF_UNIX, SOCK_STREAM, 0);
- if (lsock == -1)
- return perrorf (g, "socket");
+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;
+}
- addr.sun_family = AF_UNIX;
- snprintf (addr.sun_path, UNIX_PATH_MAX, "%s/sock", g->tmpdir);
+void
+guestfs_set_close_callback (guestfs_h *g,
+ guestfs_close_cb cb, void *opaque)
+{
+ g->close_cb = cb;
+ g->close_cb_data = opaque;
+}
- if (bind (lsock, (struct sockaddr *) &addr, sizeof addr) == -1) {
- perrorf (g, "bind");
- close (lsock);
- return -1;
- }
+void
+guestfs_set_progress_callback (guestfs_h *g,
+ guestfs_progress_cb cb, void *opaque)
+{
+ g->progress_cb = cb;
+ g->progress_cb_data = opaque;
+}
- if (listen (lsock, 1) == -1) {
- perrorf (g, "listen");
- close (lsock);
- return -1;
+/* 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.
+ */
+struct pda_entry {
+ char *key; /* key */
+ void *data; /* opaque user data pointer */
+};
+
+static size_t
+hasher (void const *x, size_t table_size)
+{
+ struct pda_entry const *p = x;
+ return hash_pjw (p->key, table_size);
+}
+
+static bool
+comparator (void const *x, void const *y)
+{
+ struct pda_entry const *a = x;
+ struct pda_entry const *b = y;
+ return STREQ (a->key, b->key);
+}
+
+static void
+freer (void *x)
+{
+ if (x) {
+ struct pda_entry *p = x;
+ free (p->key);
+ free (p);
}
+}
- if (fcntl (lsock, F_SETFL, O_NONBLOCK) == -1) {
- perrorf (g, "set socket non-blocking");
- close (lsock);
- return -1;
+void
+guestfs_set_private (guestfs_h *g, const char *key, void *data)
+{
+ if (g->pda == NULL) {
+ g->pda = hash_initialize (16, NULL, hasher, comparator, freer);
+ if (g->pda == NULL)
+ g->abort_cb ();
}
- /* Wait until the daemon running inside the guest connects to the
- * Unix socket, which indicates it's alive. Qemu might exit in the
- * meantime if there is a problem. More problematically qemu might
- * hang, which we can only detect by timeout.
- */
- for (i = 0; i < 30; ++i) {
- r = waitpid (g->pid, NULL, WNOHANG);
-
- if (r > 0 || (r == -1 && errno == ECHILD)) {
- error (g, "qemu subprocess exited unexpectedly during initialization");
- g->pid = -1;
- cleanup_fds (g);
- close (lsock);
- return -1;
- }
+ struct pda_entry *new_entry = safe_malloc (g, sizeof *new_entry);
+ new_entry->key = safe_strdup (g, key);
+ new_entry->data = data;
- r = accept (lsock, NULL, 0);
- if (r >= 0) {
- g->sock = r;
- fcntl (g->sock, F_SETFL, O_NONBLOCK);
- close (lsock);
- return 0;
- }
- if (errno == EAGAIN) {
- sleep (1);
- continue;
- }
- perrorf (g, "accept");
- close (lsock);
- guestfs_kill_subprocess (g);
- return -1;
- }
+ struct pda_entry *old_entry = hash_delete (g->pda, new_entry);
+ freer (old_entry);
- close (lsock);
- return error (g, "timeout waiting for guest to become ready");
+ struct pda_entry *entry = hash_insert (g->pda, new_entry);
+ if (entry == NULL)
+ g->abort_cb ();
+ assert (entry == new_entry);
}
-int
-guestfs_ready (guestfs_h *g)
+static inline char *
+bad_cast (char const *s)
{
- return
- g->pid >= 0 &&
- kill (g->pid, 0) == 0 &&
- g->sock >= 0 /* &&
- guestfs_ping_daemon (g) >= 0 */;
+ return (char *) s;
}
-int
-guestfs_kill_subprocess (guestfs_h *g)
+void *
+guestfs_get_private (guestfs_h *g, const char *key)
{
- if (g->pid >= 0) {
- if (g->verbose)
- fprintf (stderr, "sending SIGINT to pid %d\n", g->pid);
+ if (g->pda == NULL)
+ return NULL; /* no keys have been set */
+
+ 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;
+}
- kill (g->pid, SIGINT);
- wait_subprocess (g);
+/* When tracing, be careful how we print BufferIn parameters which
+ * usually contain large amounts of binary data (RHBZ#646822).
+ */
+void
+guestfs___print_BufferIn (FILE *out, const char *buf, size_t buf_size)
+{
+ size_t i;
+ size_t orig_size = buf_size;
+
+ if (buf_size > 256)
+ buf_size = 256;
+
+ fputc ('"', out);
+
+ for (i = 0; i < buf_size; ++i) {
+ if (c_isprint (buf[i]))
+ fputc (buf[i], out);
+ else
+ fprintf (out, "\\x%02x", (unsigned char) buf[i]);
}
- cleanup_fds (g);
+ fputc ('"', out);
- return 0;
+ if (orig_size > buf_size)
+ fprintf (out,
+ _("<truncated, original size %zu bytes>"), orig_size);
+}
+
+void
+guestfs___print_BufferOut (FILE *out, const char *buf, size_t buf_size)
+{
+ guestfs___print_BufferIn (out, buf, buf_size);
+}
+
+void
+guestfs___free_string_list (char **argv)
+{
+ size_t i;
+ for (i = 0; argv[i] != NULL; ++i)
+ free (argv[i]);
+ free (argv);
}
git.annexia.org / libguestfs.git / blobdiff