/* 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 "guestfs.h"
-#include "guestfs_protocol.h"
-#include "ignore-value.h"
+#include <arpa/inet.h>
+#include <netinet/in.h>
-#ifdef HAVE_GETTEXT
-#include "gettext.h"
-#define _(str) dgettext(PACKAGE, (str))
-//#define N_(str) dgettext(PACKAGE, (str))
-#else
-#define _(str) str
-//#define N_(str) str
-#endif
+#include "c-ctype.h"
+#include "glthread/lock.h"
+#include "hash.h"
+#include "hash-pjw.h"
-#define error guestfs_error
-#define perrorf guestfs_perrorf
-#define safe_malloc guestfs_safe_malloc
-#define safe_realloc guestfs_safe_realloc
-#define safe_strdup guestfs_safe_strdup
-//#define safe_memdup guestfs_safe_memdup
+#include "guestfs.h"
+#include "guestfs-internal.h"
+#include "guestfs-internal-actions.h"
+#include "guestfs_protocol.h"
static void default_error_cb (guestfs_h *g, void *data, const char *msg);
-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 void close_handles (void);
-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);
-
-/* Default select-based main loop. */
-struct select_handle_cb_data {
- guestfs_handle_event_cb cb;
- guestfs_h *g;
- void *data;
-};
-
-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 fd[2]; /* Stdin/stdout of qemu. */
- int sock; /* Daemon communications socket. */
- pid_t pid; /* Qemu PID. */
- pid_t recoverypid; /* Recovery process 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 *qemu_help, *qemu_version; /* Output of qemu -help, qemu -version. */
-
- char **cmdline; /* Qemu command line. */
- int cmdline_size;
-
- int verbose;
- int autosync;
-
- char *path; /* Path to kernel, initrd. */
- char *qemu; /* Qemu binary. */
- char *append; /* Append to kernel command line. */
-
- int memsize; /* Size of RAM (megabytes). */
-
- int selinux; /* selinux enabled? */
-
- 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;
- 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;
-
- /* Main loop used by this handle. */
- guestfs_main_loop *main_loop;
-
- /* Messages sent and received from the daemon. */
- char *msg_in;
- unsigned int msg_in_size, msg_in_allocated;
- char *msg_out;
- unsigned 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;
+ g->autosync = 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 ? strdup (str) : strdup (GUESTFS_DEFAULT_PATH);
} else
g->memsize = 500;
- g->main_loop = guestfs_get_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) */
+ /* 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);
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) {
guestfs_umount_all (g);
if (g->state != CONFIG)
guestfs_kill_subprocess (g);
- /* Close any sockets and deregister any handlers. */
- if (g->stdout_watch >= 0)
- g->main_loop->remove_handle (g->main_loop, g, g->stdout_watch);
- if (g->sock_watch >= 0)
- g->main_loop->remove_handle (g->main_loop, g, g->sock_watch);
- g->stdout_watch = -1;
- g->sock_watch = -1;
-
+ /* Close sockets. */
if (g->fd[0] >= 0)
close (g->fd[0]);
if (g->fd[1] >= 0)
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/initrd", g->tmpdir);
- unlink (filename);
-
- snprintf (filename, sizeof filename, "%s/kernel", g->tmpdir);
- unlink (filename);
-
rmdir (g->tmpdir);
free (g->tmpdir);
/* 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);
- free (g->msg_in);
- free (g->msg_out);
+ if (g->pda)
+ hash_free (g->pda);
free (g->last_error);
free (g->path);
free (g->qemu);
if (err < 0) return;
-#ifndef _GNU_SOURCE
+#if !defined(_GNU_SOURCE) || defined(__APPLE__)
char buf[256];
strerror_r (errnum, buf, sizeof buf);
#else
/* 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. */
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)
{
return p;
}
-static int
-xwrite (int fd, const void *v_buf, size_t len)
-{
- const char *buf = v_buf;
- int r;
-
- while (len > 0) {
- r = write (fd, buf, len);
- if (r == -1)
- return -1;
-
- buf += r;
- len -= r;
- }
-
- return 0;
-}
-
-static int
-xread (int fd, void *v_buf, size_t len)
-{
- char *buf = v_buf;
- int r;
-
- while (len > 0) {
- r = read (fd, buf, len);
- if (r == -1) {
- if (errno == EINTR || errno == EAGAIN)
- continue;
- return -1;
- }
-
- buf += r;
- len -= r;
- }
-
- return 0;
-}
-
void
guestfs_set_out_of_memory_handler (guestfs_h *g, guestfs_abort_cb cb)
{
}
int
-guestfs_set_verbose (guestfs_h *g, int v)
+guestfs__set_verbose (guestfs_h *g, int v)
{
g->verbose = !!v;
return 0;
}
int
-guestfs_get_verbose (guestfs_h *g)
+guestfs__get_verbose (guestfs_h *g)
{
return g->verbose;
}
int
-guestfs_set_autosync (guestfs_h *g, int a)
+guestfs__set_autosync (guestfs_h *g, int a)
{
g->autosync = !!a;
return 0;
}
int
-guestfs_get_autosync (guestfs_h *g)
+guestfs__get_autosync (guestfs_h *g)
{
return g->autosync;
}
int
-guestfs_set_path (guestfs_h *g, const char *path)
+guestfs__set_path (guestfs_h *g, const char *path)
{
free (g->path);
g->path = NULL;
}
const char *
-guestfs_get_path (guestfs_h *g)
+guestfs__get_path (guestfs_h *g)
{
return g->path;
}
int
-guestfs_set_qemu (guestfs_h *g, const char *qemu)
+guestfs__set_qemu (guestfs_h *g, const char *qemu)
{
free (g->qemu);
g->qemu = NULL;
}
const char *
-guestfs_get_qemu (guestfs_h *g)
+guestfs__get_qemu (guestfs_h *g)
{
return g->qemu;
}
int
-guestfs_set_append (guestfs_h *g, const char *append)
+guestfs__set_append (guestfs_h *g, const char *append)
{
free (g->append);
g->append = NULL;
}
const char *
-guestfs_get_append (guestfs_h *g)
+guestfs__get_append (guestfs_h *g)
{
return g->append;
}
int
-guestfs_set_memsize (guestfs_h *g, int memsize)
+guestfs__set_memsize (guestfs_h *g, int memsize)
{
g->memsize = memsize;
return 0;
}
int
-guestfs_get_memsize (guestfs_h *g)
+guestfs__get_memsize (guestfs_h *g)
{
return g->memsize;
}
int
-guestfs_set_selinux (guestfs_h *g, int selinux)
+guestfs__set_selinux (guestfs_h *g, int selinux)
{
g->selinux = selinux;
return 0;
}
int
-guestfs_get_selinux (guestfs_h *g)
+guestfs__get_selinux (guestfs_h *g)
{
return g->selinux;
}
int
-guestfs_get_pid (guestfs_h *g)
+guestfs__get_pid (guestfs_h *g)
{
if (g->pid > 0)
return g->pid;
}
struct guestfs_version *
-guestfs_version (guestfs_h *g)
+guestfs__version (guestfs_h *g)
{
struct guestfs_version *r;
return r;
}
-/* Add a string to the current command line. */
-static void
-incr_cmdline_size (guestfs_h *g)
+int
+guestfs__set_trace (guestfs_h *g, int t)
{
- 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;
- }
-
- g->cmdline_size++;
- g->cmdline = safe_realloc (g, g->cmdline, sizeof (char *) * g->cmdline_size);
+ g->trace = !!t;
+ return 0;
}
-static int
-add_cmdline (guestfs_h *g, const char *str)
+int
+guestfs__get_trace (guestfs_h *g)
{
- if (g->state != CONFIG) {
- error (g,
- _("command line cannot be altered after qemu subprocess launched"));
- return -1;
- }
+ return g->trace;
+}
- incr_cmdline_size (g);
- g->cmdline[g->cmdline_size-1] = safe_strdup (g, str);
+int
+guestfs__set_direct (guestfs_h *g, int d)
+{
+ g->direct = !!d;
return 0;
}
int
-guestfs_config (guestfs_h *g,
- const char *qemu_param, const char *qemu_value)
+guestfs__get_direct (guestfs_h *g)
{
- if (qemu_param[0] != '-') {
- error (g, _("guestfs_config: parameter must begin with '-' character"));
- return -1;
- }
-
- /* 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, "-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;
-
- if (qemu_value != NULL) {
- if (add_cmdline (g, qemu_value) != 0) return -1;
- }
+ return g->direct;
+}
+int
+guestfs__set_recovery_proc (guestfs_h *g, int f)
+{
+ g->recovery_proc = !!f;
return 0;
}
int
-guestfs_add_drive (guestfs_h *g, const char *filename)
+guestfs__get_recovery_proc (guestfs_h *g)
{
- size_t len = strlen (filename) + 64;
- char buf[len];
-
- if (strchr (filename, ',') != NULL) {
- error (g, _("filename cannot contain ',' (comma) character"));
- return -1;
- }
-
- /* cache=off improves reliability in the event of a host crash.
- *
- * However this option causes qemu to try to open the file with
- * O_DIRECT. This fails on some filesystem types (notably tmpfs).
- * So we check if we can open the file with or without O_DIRECT,
- * and use cache=off (or not) accordingly.
- *
- * This test also checks for the presence of the file, which
- * is a documented semantic of this interface.
- */
- int fd = open (filename, O_RDONLY|O_DIRECT);
- if (fd >= 0) {
- close (fd);
- snprintf (buf, len, "file=%s,cache=off,if=" DRIVE_IF, filename);
- } else {
- fd = open (filename, O_RDONLY);
- if (fd >= 0) {
- close (fd);
- snprintf (buf, len, "file=%s,if=" DRIVE_IF, filename);
- } else {
- perrorf (g, "%s", filename);
- return -1;
- }
- }
-
- return guestfs_config (g, "-drive", buf);
+ return g->recovery_proc;
}
int
-guestfs_add_drive_ro (guestfs_h *g, const char *filename)
+guestfs__set_network (guestfs_h *g, int v)
{
- size_t 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,snapshot=on,if=%s", filename, DRIVE_IF);
-
- return guestfs_config (g, "-drive", buf);
+ g->enable_network = !!v;
+ return 0;
}
int
-guestfs_add_cdrom (guestfs_h *g, const char *filename)
+guestfs__get_network (guestfs_h *g)
{
- 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);
+ return g->enable_network;
}
-/* Returns true iff file is contained in dir. */
-static int
-dir_contains_file (const char *dir, const char *file)
+void
+guestfs_set_log_message_callback (guestfs_h *g,
+ guestfs_log_message_cb cb, void *opaque)
{
- int dirlen = strlen (dir);
- int filelen = strlen (file);
- int len = dirlen+filelen+2;
- char path[len];
-
- snprintf (path, len, "%s/%s", dir, file);
- return access (path, F_OK) == 0;
+ g->log_message_cb = cb;
+ g->log_message_cb_data = opaque;
}
-/* Returns true iff every listed file is contained in 'dir'. */
-static int
-dir_contains_files (const char *dir, ...)
+void
+guestfs_set_subprocess_quit_callback (guestfs_h *g,
+ guestfs_subprocess_quit_cb cb, void *opaque)
{
- va_list args;
- const char *file;
-
- va_start (args, dir);
- while ((file = va_arg (args, const char *)) != NULL) {
- if (!dir_contains_file (dir, file)) {
- va_end (args);
- return 0;
- }
- }
- va_end (args);
- return 1;
+ g->subprocess_quit_cb = cb;
+ g->subprocess_quit_cb_data = opaque;
}
-static int build_supermin_appliance (guestfs_h *g, const char *path, char **kernel, char **initrd);
-static int test_qemu (guestfs_h *g);
-static int qemu_supports (guestfs_h *g, const char *option);
-static void print_cmdline (guestfs_h *g);
-
-static const char *kernel_name = "vmlinuz." REPO "." host_cpu;
-static const char *initrd_name = "initramfs." REPO "." host_cpu ".img";
-static const char *supermin_name =
- "initramfs." REPO "." host_cpu ".supermin.img";
-static const char *supermin_hostfiles_name =
- "initramfs." REPO "." host_cpu ".supermin.hostfiles";
-
-int
-guestfs_launch (guestfs_h *g)
+void
+guestfs_set_launch_done_callback (guestfs_h *g,
+ guestfs_launch_done_cb cb, void *opaque)
{
- const char *tmpdir;
- char dir_template[PATH_MAX];
- int r, pmore;
- size_t len;
- int wfd[2], rfd[2];
- int tries;
- char *path, *pelem, *pend;
- char *kernel = NULL, *initrd = NULL;
- char unixsock[256];
- struct sockaddr_un addr;
-
-#ifdef P_tmpdir
- tmpdir = P_tmpdir;
-#else
- tmpdir = "/tmp";
-#endif
-
- tmpdir = getenv ("TMPDIR") ? : tmpdir;
- snprintf (dir_template, sizeof dir_template, "%s/libguestfsXXXXXX", tmpdir);
-
- /* Configured? */
- if (!g->cmdline) {
- error (g, _("you must call guestfs_add_drive before guestfs_launch"));
- return -1;
- }
-
- if (g->state != CONFIG) {
- error (g, _("qemu has already been launched"));
- return -1;
- }
-
- /* Make the temporary directory. */
- 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;
- }
- }
-
- /* First search g->path for the supermin appliance, and try to
- * synthesize a kernel and initrd from that. If it fails, we
- * try the path search again looking for a backup ordinary
- * appliance.
- */
- pelem = path = safe_strdup (g, g->path);
- do {
- pend = strchrnul (pelem, ':');
- pmore = *pend == ':';
- *pend = '\0';
- len = pend - pelem;
-
- /* Empty element of "." means cwd. */
- if (len == 0 || (len == 1 && *pelem == '.')) {
- if (g->verbose)
- fprintf (stderr,
- "looking for supermin appliance in current directory\n");
- if (dir_contains_files (".",
- supermin_name, supermin_hostfiles_name,
- "kmod.whitelist", NULL)) {
- if (build_supermin_appliance (g, ".", &kernel, &initrd) == -1)
- return -1;
- break;
- }
- }
- /* Look at <path>/supermin* etc. */
- else {
- if (g->verbose)
- fprintf (stderr, "looking for supermin appliance in %s\n", pelem);
-
- if (dir_contains_files (pelem,
- supermin_name, supermin_hostfiles_name,
- "kmod.whitelist", NULL)) {
- if (build_supermin_appliance (g, pelem, &kernel, &initrd) == -1)
- return -1;
- break;
- }
- }
-
- pelem = pend + 1;
- } while (pmore);
-
- free (path);
-
- if (kernel == NULL || initrd == NULL) {
- /* 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 appliance in current directory\n");
- if (dir_contains_files (".", kernel_name, initrd_name, NULL)) {
- kernel = safe_strdup (g, kernel_name);
- initrd = safe_strdup (g, initrd_name);
- break;
- }
- }
- /* Look at <path>/kernel etc. */
- else {
- if (g->verbose)
- fprintf (stderr, "looking for appliance in %s\n", pelem);
-
- if (dir_contains_files (pelem, kernel_name, initrd_name, NULL)) {
- 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);
- break;
- }
- }
-
- 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;
- }
-
- /* Get qemu help text and version. */
- if (test_qemu (g) == -1)
- goto cleanup0;
-
- /* Make the vmchannel socket. */
- 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];
- char memsize_str[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] = g->qemu;
-
-#define LINUX_CMDLINE \
- "panic=1 " /* force kernel to panic if daemon exits */ \
- "console=ttyS0 " /* serial console */ \
- "udevtimeout=300 " /* good for very slow systems (RHBZ#480319) */ \
- "noapic " /* workaround for RHBZ#502058 - ok if not SMP */ \
- "acpi=off " /* we don't need ACPI, turn it off */ \
- "cgroup_disable=memory " /* saves us about 5 MB of RAM */
-
- /* Linux kernel command line. */
- snprintf (append, sizeof append,
- LINUX_CMDLINE
- "guestfs=%s:%d "
- "%s" /* (selinux) */
- "%s" /* (verbose) */
- "%s", /* (append) */
- VMCHANNEL_ADDR, VMCHANNEL_PORT,
- g->selinux ? "selinux=1 enforcing=0 " : "selinux=0 ",
- g->verbose ? "guestfs_verbose=1 " : " ",
- g->append ? g->append : "");
-
- snprintf (memsize_str, sizeof memsize_str, "%d", g->memsize);
-
- add_cmdline (g, "-m");
- add_cmdline (g, memsize_str);
- add_cmdline (g, "-no-reboot"); /* Force exit instead of reboot on panic */
- 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");
-
-#if 0
- /* Doesn't work. See:
- * http://lists.gnu.org/archive/html/qemu-devel/2009-07/threads.html
- * Subject "guestfwd option doesn't allow supplementary ,server,nowait"
- */
- if (qemu_supports (g, "guestfwd")) {
- /* New-style -net user,guestfwd=... syntax for vmchannel. See:
- * http://git.savannah.gnu.org/cgit/qemu.git/commit/?id=c92ef6a22d3c71538fcc48fb61ad353f7ba03b62
- */
- snprintf (vmchannel, sizeof vmchannel,
- "user,vlan=0,net=10.0.2.0/8,guestfwd=tcp:%s:%d-unix:%s,server,nowait",
- VMCHANNEL_ADDR, VMCHANNEL_PORT, unixsock);
-
- add_cmdline (g, "-net");
- add_cmdline (g, vmchannel);
- } else {
-#endif
- /* Not guestfwd. HOPEFULLY this qemu uses the older -net channel
- * syntax, or if not then we'll get a quick failure.
- */
- snprintf (vmchannel, sizeof vmchannel,
- "channel,%d:unix:%s,server,nowait",
- VMCHANNEL_PORT, unixsock);
-
- add_cmdline (g, "-net");
- add_cmdline (g, vmchannel);
- add_cmdline (g, "-net");
- add_cmdline (g, "user,vlan=0,net=10.0.2.0/8");
-#if 0
- }
-#endif
- add_cmdline (g, "-net");
- add_cmdline (g, "nic,model=" NET_IF ",vlan=0");
-
- /* These options recommended by KVM developers to improve reliability. */
- if (qemu_supports (g, "-no-hpet"))
- add_cmdline (g, "-no-hpet");
-
- if (qemu_supports (g, "-rtc-td-hack"))
- add_cmdline (g, "-rtc-td-hack");
-
- /* Finish off the command line. */
- incr_cmdline_size (g);
- g->cmdline[g->cmdline_size-1] = NULL;
-
- if (g->verbose)
- print_cmdline (g);
-
- /* Set up stdin, stdout. */
- close (0);
- close (1);
- close (wfd[1]);
- close (rfd[0]);
-
- if (dup (wfd[0]) == -1) {
- dup_failed:
- perror ("dup failed");
- _exit (1);
- }
- if (dup (rfd[1]) == -1)
- goto dup_failed;
-
- 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 (g->qemu, g->cmdline); /* Run qemu. */
- perror (g->qemu);
- _exit (1);
- }
-
- /* Parent (library). */
- g->pid = r;
-
- free (kernel);
- kernel = NULL;
- free (initrd);
- initrd = NULL;
-
- /* Fork the recovery process off which will kill qemu if the parent
- * process fails to do so (eg. if the parent segfaults).
- */
- r = fork ();
- if (r == 0) {
- pid_t qemu_pid = g->pid;
- pid_t parent_pid = getppid ();
-
- /* Writing to argv is hideously complicated and error prone. See:
- * http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/ps_status.c?rev=1.33.2.1;content-type=text%2Fplain
- */
-
- /* Loop around waiting for one or both of the other processes to
- * disappear. It's fair to say this is very hairy. The PIDs that
- * we are looking at might be reused by another process. We are
- * effectively polling. Is the cure worse than the disease?
- */
- for (;;) {
- if (kill (qemu_pid, 0) == -1) /* qemu's gone away, we aren't needed */
- _exit (0);
- if (kill (parent_pid, 0) == -1) {
- /* Parent's gone away, qemu still around, so kill qemu. */
- kill (qemu_pid, 9);
- _exit (0);
- }
- sleep (2);
- }
- }
-
- /* Don't worry, if the fork failed, this will be -1. The recovery
- * process isn't essential.
- */
- g->recoverypid = r;
+ g->launch_done_cb = cb;
+ g->launch_done_cb_data = opaque;
+}
- /* Start the clock ... */
- time (&g->start_t);
+void
+guestfs_set_close_callback (guestfs_h *g,
+ guestfs_close_cb cb, void *opaque)
+{
+ g->close_cb = cb;
+ g->close_cb_data = opaque;
+}
- /* Close the other ends of the pipe. */
- close (wfd[0]);
- close (rfd[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 (fcntl (wfd[1], F_SETFL, O_NONBLOCK) == -1 ||
- fcntl (rfd[0], F_SETFL, O_NONBLOCK) == -1) {
- perrorf (g, "fcntl");
- goto cleanup1;
- }
+/* 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 */
+};
- 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;
- }
+static size_t
+hasher (void const *x, size_t table_size)
+{
+ struct pda_entry const *p = x;
+ return hash_pjw (p->key, table_size);
+}
- if (fcntl (g->sock, F_SETFL, O_NONBLOCK) == -1) {
- perrorf (g, "fcntl");
- goto cleanup2;
- }
+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);
+}
- addr.sun_family = AF_UNIX;
- strncpy (addr.sun_path, unixsock, UNIX_PATH_MAX);
- addr.sun_path[UNIX_PATH_MAX-1] = '\0';
-
- tries = 100;
- /* Always sleep at least once to give qemu a small chance to start up. */
- usleep (10000);
- while (tries > 0) {
- 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--;
- usleep (100000);
+static void
+freer (void *x)
+{
+ if (x) {
+ struct pda_entry *p = x;
+ free (p->key);
+ free (p);
}
+}
- 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 =
- 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;
+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 ();
}
- if (guestfs__switch_to_receiving (g) == -1)
- goto cleanup3;
-
- g->state = LAUNCHING;
- return 0;
-
- cleanup3:
- if (g->stdout_watch >= 0)
- g->main_loop->remove_handle (g->main_loop, g, g->stdout_watch);
- if (g->sock_watch >= 0)
- g->main_loop->remove_handle (g->main_loop, g, g->sock_watch);
+ struct pda_entry *new_entry = safe_malloc (g, sizeof *new_entry);
+ new_entry->key = safe_strdup (g, key);
+ new_entry->data = data;
- cleanup2:
- close (g->sock);
+ struct pda_entry *old_entry = hash_delete (g->pda, new_entry);
+ freer (old_entry);
- cleanup1:
- close (wfd[1]);
- close (rfd[0]);
- kill (g->pid, 9);
- if (g->recoverypid > 0) kill (g->recoverypid, 9);
- waitpid (g->pid, NULL, 0);
- if (g->recoverypid > 0) waitpid (g->recoverypid, NULL, 0);
- g->fd[0] = -1;
- g->fd[1] = -1;
- g->sock = -1;
- g->pid = 0;
- g->recoverypid = 0;
- g->start_t = 0;
- g->stdout_watch = -1;
- g->sock_watch = -1;
-
- cleanup0:
- free (kernel);
- free (initrd);
- return -1;
+ struct pda_entry *entry = hash_insert (g->pda, new_entry);
+ if (entry == NULL)
+ g->abort_cb ();
+ assert (entry == new_entry);
}
-/* This function is used to print the qemu command line before it gets
- * executed, when in verbose mode.
- */
-static void
-print_cmdline (guestfs_h *g)
+static inline char *
+bad_cast (char const *s)
{
- int i = 0;
- int needs_quote;
-
- while (g->cmdline[i]) {
- if (g->cmdline[i][0] == '-') /* -option starts a new line */
- fprintf (stderr, " \\\n ");
-
- if (i > 0) fputc (' ', stderr);
-
- /* Does it need shell quoting? This only deals with simple cases. */
- needs_quote = strcspn (g->cmdline[i], " ") != strlen (g->cmdline[i]);
-
- if (needs_quote) fputc ('\'', stderr);
- fprintf (stderr, "%s", g->cmdline[i]);
- if (needs_quote) fputc ('\'', stderr);
- i++;
- }
-
- fputc ('\n', stderr);
+ return (char *) s;
}
-/* This function does the hard work of building the supermin appliance
- * on the fly. 'path' is the directory containing the control files.
- * 'kernel' and 'initrd' are where we will return the names of the
- * kernel and initrd (only initrd is built). The work is done by
- * an external script. We just tell it where to put the result.
- */
-static int
-build_supermin_appliance (guestfs_h *g, const char *path,
- char **kernel, char **initrd)
+void *
+guestfs_get_private (guestfs_h *g, const char *key)
{
- char cmd[4096];
- int r, len;
-
- len = strlen (g->tmpdir);
- *kernel = safe_malloc (g, len + 8);
- snprintf (*kernel, len+8, "%s/kernel", g->tmpdir);
- *initrd = safe_malloc (g, len + 8);
- snprintf (*initrd, len+8, "%s/initrd", g->tmpdir);
-
- snprintf (cmd, sizeof cmd,
- "PATH='%s':$PATH "
- "libguestfs-supermin-helper '%s' %s %s",
- path,
- path, *kernel, *initrd);
-
- r = system (cmd);
- if (r == -1 || WEXITSTATUS(r) != 0) {
- error (g, _("external command failed: %s"), cmd);
- free (*kernel);
- free (*initrd);
- *kernel = *initrd = NULL;
- return -1;
- }
+ if (g->pda == NULL)
+ return NULL; /* no keys have been set */
- return 0;
+ 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;
}
-static int read_all (guestfs_h *g, FILE *fp, char **ret);
-
-/* Test qemu binary (or wrapper) runs, and do 'qemu -help' and
- * 'qemu -version' so we know what options this qemu supports and
- * the version.
+/* When tracing, be careful how we print BufferIn parameters which
+ * usually contain large amounts of binary data (RHBZ#646822).
*/
-static int
-test_qemu (guestfs_h *g)
+void
+guestfs___print_BufferIn (FILE *out, const char *buf, size_t buf_size)
{
- char cmd[1024];
- FILE *fp;
-
- free (g->qemu_help);
- free (g->qemu_version);
- g->qemu_help = NULL;
- g->qemu_version = NULL;
-
- snprintf (cmd, sizeof cmd, "'%s' -help", g->qemu);
-
- fp = popen (cmd, "r");
- /* qemu -help should always work (qemu -version OTOH wasn't
- * supported by qemu 0.9). If this command doesn't work then it
- * probably indicates that the qemu binary is missing.
- */
- if (!fp) {
- /* XXX This error is never printed, even if the qemu binary
- * doesn't exist. Why?
- */
- error:
- perrorf (g, _("%s: command failed: If qemu is located on a non-standard path, try setting the LIBGUESTFS_QEMU environment variable."), cmd);
- return -1;
- }
+ size_t i;
+ size_t orig_size = buf_size;
- if (read_all (g, fp, &g->qemu_help) == -1)
- goto error;
+ if (buf_size > 256)
+ buf_size = 256;
- if (pclose (fp) == -1)
- goto error;
+ fputc ('"', out);
- snprintf (cmd, sizeof cmd, "'%s' -version 2>/dev/null", g->qemu);
-
- fp = popen (cmd, "r");
- if (fp) {
- /* Intentionally ignore errors. */
- read_all (g, fp, &g->qemu_version);
- pclose (fp);
+ 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]);
}
- return 0;
-}
-
-static int
-read_all (guestfs_h *g, FILE *fp, char **ret)
-{
- int r, n = 0;
- char *p;
-
- again:
- if (feof (fp)) {
- *ret = safe_realloc (g, *ret, n + 1);
- (*ret)[n] = '\0';
- return n;
- }
+ fputc ('"', out);
- *ret = safe_realloc (g, *ret, n + BUFSIZ);
- p = &(*ret)[n];
- r = fread (p, 1, BUFSIZ, fp);
- if (ferror (fp)) {
- perrorf (g, "read");
- return -1;
- }
- n += r;
- goto again;
-}
-
-/* Test if option is supported by qemu command line (just by grepping
- * the help text).
- */
-static int
-qemu_supports (guestfs_h *g, const char *option)
-{
- return g->qemu_help && strstr (g->qemu_help, option) != NULL;
-}
-
-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;
- g->main_loop->main_loop_quit (g->main_loop, g);
-}
-
-int
-guestfs_wait_ready (guestfs_h *g)
-{
- int finished = 0, r;
-
- 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 = finish_wait_ready;
- g->launch_done_cb_data = &finished;
- r = g->main_loop->main_loop_run (g->main_loop, g);
- g->launch_done_cb = NULL;
- g->launch_done_cb_data = NULL;
-
- if (r == -1) return -1;
-
- if (finished != 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;
- }
-
- return 0;
-}
-
-int
-guestfs_kill_subprocess (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);
- if (g->recoverypid > 0) kill (g->recoverypid, 9);
-
- return 0;
-}
-
-/* Access current state. */
-int
-guestfs_is_config (guestfs_h *g)
-{
- return g->state == CONFIG;
-}
-
-int
-guestfs_is_launching (guestfs_h *g)
-{
- return g->state == LAUNCHING;
-}
-
-int
-guestfs_is_ready (guestfs_h *g)
-{
- return g->state == READY;
-}
-
-int
-guestfs_is_busy (guestfs_h *g)
-{
- return g->state == BUSY;
-}
-
-int
-guestfs_get_state (guestfs_h *g)
-{
- return g->state;
-}
-
-int
-guestfs_set_ready (guestfs_h *g)
-{
- if (g->state != BUSY) {
- error (g, _("guestfs_set_ready: called when in state %d != BUSY"),
- g->state);
- return -1;
- }
- g->state = READY;
- return 0;
-}
-
-int
-guestfs_set_busy (guestfs_h *g)
-{
- if (g->state != READY) {
- error (g, _("guestfs_set_busy: called when in state %d != READY"),
- g->state);
- return -1;
- }
- g->state = BUSY;
- return 0;
-}
-
-int
-guestfs_end_busy (guestfs_h *g)
-{
- switch (g->state)
- {
- case BUSY:
- g->state = READY;
- break;
- case CONFIG:
- case READY:
- break;
-
- case LAUNCHING:
- case NO_HANDLE:
- default:
- error (g, _("guestfs_end_busy: called when in state %d"), g->state);
- return -1;
- }
- return 0;
-}
-
-/* We don't know if stdout_event or sock_read_event will be the
- * first to receive EOF if the qemu process dies. This function
- * has the common cleanup code for both.
- */
-static void
-child_cleanup (guestfs_h *g)
-{
- if (g->verbose)
- fprintf (stderr, "stdout_event: %p: child process died\n", g);
- /*kill (g->pid, SIGTERM);*/
- if (g->recoverypid > 0) kill (g->recoverypid, 9);
- waitpid (g->pid, NULL, 0);
- if (g->recoverypid > 0) waitpid (g->recoverypid, NULL, 0);
- if (g->stdout_watch >= 0)
- g->main_loop->remove_handle (g->main_loop, g, g->stdout_watch);
- if (g->sock_watch >= 0)
- g->main_loop->remove_handle (g->main_loop, 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->recoverypid = 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);
-}
-
-/* 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 (struct guestfs_main_loop *ml, guestfs_h *g, void *data,
- int watch, int fd, int events)
-{
- 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. */
- child_cleanup (g);
- return;
- }
-
- if (n == -1) {
- if (errno != EINTR && errno != EAGAIN)
- perrorf (g, "read");
- return;
- }
-
- /* In verbose mode, copy all log messages to stderr. */
- if (g->verbose)
- ignore_value (write (STDERR_FILENO, 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);
-}
-
-/* The function is called whenever we can read something on the
- * guestfsd (daemon inside the guest) communication socket.
- */
-static void
-sock_read_event (struct guestfs_main_loop *ml, guestfs_h *g, void *data,
- int watch, int fd, int events)
-{
- XDR xdr;
- u_int32_t 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. */
- child_cleanup (g);
- return;
- }
-
- if (n == -1) {
- if (errno != EINTR && 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? */
- again:
- 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 == GUESTFS_LAUNCH_FLAG) {
- 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)
- g->launch_done_cb (g, g->launch_done_cb_data);
- }
-
- goto cleanup;
- }
-
- /* This can happen if a cancellation happens right at the end
- * of us sending a FileIn parameter to the daemon. Discard. The
- * daemon should send us an error message next.
- */
- if (len == GUESTFS_CANCEL_FLAG) {
- g->msg_in_size -= 4;
- memmove (g->msg_in, g->msg_in+4, g->msg_in_size);
- goto again;
- }
-
- /* 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. */
-
- /* Got the full message, begin processing it. */
-#if 0
- 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");
- }
- }
-#endif
-
- /* Not in the expected state. */
- if (g->state != BUSY)
- error (g, _("state %d != BUSY"), g->state);
-
- /* Push the message up to the higher layer. */
- if (g->reply_cb)
- g->reply_cb (g, g->reply_cb_data, &xdr);
- else
- /* This message (probably) should never be printed. */
- fprintf (stderr, "libguesfs: sock_read_event: !!! dropped message !!!\n");
-
- g->msg_in_size -= len + 4;
- memmove (g->msg_in, g->msg_in+len+4, g->msg_in_size);
- if (g->msg_in_size > 0) goto again;
-
- 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);
-}
-
-/* The function is called whenever we can write something on the
- * guestfsd (daemon inside the guest) communication socket.
- */
-static void
-sock_write_event (struct guestfs_main_loop *ml, guestfs_h *g, void *data,
- int watch, int fd, int events)
-{
- int n, err;
-
- 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) {
- err = errno;
- if (err != EAGAIN)
- perrorf (g, "write");
- if (err == EPIPE) /* Disconnected from guest (RHBZ#508713). */
- child_cleanup (g);
- 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, calling send_cb\n");
-
- free (g->msg_out);
- g->msg_out = NULL;
- g->msg_out_pos = g->msg_out_size = 0;
-
- /* Done writing, call the higher layer. */
- if (g->send_cb)
- g->send_cb (g, g->send_cb_data);
-}
-
-void
-guestfs_set_send_callback (guestfs_h *g,
- guestfs_send_cb cb, void *opaque)
-{
- g->send_cb = cb;
- g->send_cb_data = opaque;
-}
-
-void
-guestfs_set_reply_callback (guestfs_h *g,
- guestfs_reply_cb cb, void *opaque)
-{
- g->reply_cb = cb;
- g->reply_cb_data = opaque;
-}
-
-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;
-}
-
-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;
-}
-
-/* Access to the handle's main loop and the default main loop. */
-void
-guestfs_set_main_loop (guestfs_h *g, guestfs_main_loop *main_loop)
-{
- g->main_loop = main_loop;
-}
-
-guestfs_main_loop *
-guestfs_get_main_loop (guestfs_h *g)
-{
- return g->main_loop;
-}
-
-guestfs_main_loop *
-guestfs_get_default_main_loop (void)
-{
- return (guestfs_main_loop *) &default_main_loop;
-}
-
-/* Change the daemon socket handler so that we are now writing.
- * This sets the handle to sock_write_event.
- */
-int
-guestfs__switch_to_sending (guestfs_h *g)
-{
- if (g->sock_watch >= 0) {
- if (g->main_loop->remove_handle (g->main_loop, g, g->sock_watch) == -1) {
- error (g, _("remove_handle failed"));
- g->sock_watch = -1;
- return -1;
- }
- }
-
- 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"));
- return -1;
- }
-
- return 0;
-}
-
-int
-guestfs__switch_to_receiving (guestfs_h *g)
-{
- if (g->sock_watch >= 0) {
- if (g->main_loop->remove_handle (g->main_loop, g, g->sock_watch) == -1) {
- error (g, _("remove_handle failed"));
- g->sock_watch = -1;
- return -1;
- }
- }
-
- g->sock_watch =
- 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"));
- return -1;
- }
-
- return 0;
-}
-
-/* Dispatch a call (len + header + args) to the remote daemon,
- * synchronously (ie. using the guest's main loop to wait until
- * it has been sent). Returns -1 for error, or the serial
- * number of the message.
- */
-static void
-send_cb (guestfs_h *g, void *data)
-{
- guestfs_main_loop *ml = guestfs_get_main_loop (g);
-
- *((int *)data) = 1;
- ml->main_loop_quit (ml, g);
-}
-
-int
-guestfs__send_sync (guestfs_h *g, int proc_nr,
- xdrproc_t xdrp, char *args)
-{
- struct guestfs_message_header hdr;
- XDR xdr;
- u_int32_t len;
- int serial = g->msg_next_serial++;
- int sent;
- guestfs_main_loop *ml = guestfs_get_main_loop (g);
-
- if (g->state != BUSY) {
- error (g, _("guestfs__send_sync: state %d != BUSY"), g->state);
- return -1;
- }
-
- /* This is probably an internal error. Or perhaps we should just
- * free the buffer anyway?
- */
- if (g->msg_out != NULL) {
- error (g, _("guestfs__send_sync: msg_out should be NULL"));
- return -1;
- }
-
- /* We have to allocate this message buffer on the heap because
- * it is quite large (although will be mostly unused). We
- * can't allocate it on the stack because in some environments
- * we have quite limited stack space available, notably when
- * running in the JVM.
- */
- g->msg_out = safe_malloc (g, GUESTFS_MESSAGE_MAX + 4);
- xdrmem_create (&xdr, g->msg_out + 4, GUESTFS_MESSAGE_MAX, XDR_ENCODE);
-
- /* 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;
-
- if (!xdr_guestfs_message_header (&xdr, &hdr)) {
- error (g, _("xdr_guestfs_message_header failed"));
- goto cleanup1;
- }
-
- /* 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"));
- goto cleanup1;
- }
- }
-
- /* Get the actual length of the message, resize the buffer to match
- * the actual length, and write the length word at the beginning.
- */
- len = xdr_getpos (&xdr);
- xdr_destroy (&xdr);
-
- g->msg_out = safe_realloc (g, g->msg_out, len + 4);
- g->msg_out_size = len + 4;
- g->msg_out_pos = 0;
-
- xdrmem_create (&xdr, g->msg_out, 4, XDR_ENCODE);
- xdr_uint32_t (&xdr, &len);
-
- if (guestfs__switch_to_sending (g) == -1)
- goto cleanup1;
-
- sent = 0;
- guestfs_set_send_callback (g, send_cb, &sent);
- if (ml->main_loop_run (ml, g) == -1)
- goto cleanup1;
- if (sent != 1) {
- error (g, _("send failed, see earlier error messages"));
- goto cleanup1;
- }
-
- return serial;
-
- cleanup1:
- free (g->msg_out);
- g->msg_out = NULL;
- g->msg_out_size = 0;
- return -1;
-}
-
-static int cancel = 0; /* XXX Implement file cancellation. */
-static int send_file_chunk_sync (guestfs_h *g, int cancel, const char *buf, size_t len);
-static int send_file_data_sync (guestfs_h *g, const char *buf, size_t len);
-static int send_file_cancellation_sync (guestfs_h *g);
-static int send_file_complete_sync (guestfs_h *g);
-
-/* Synchronously send a file.
- * Returns:
- * 0 OK
- * -1 error
- * -2 daemon cancelled (we must read the error message)
- */
-int
-guestfs__send_file_sync (guestfs_h *g, const char *filename)
-{
- char buf[GUESTFS_MAX_CHUNK_SIZE];
- int fd, r, err;
-
- fd = open (filename, O_RDONLY);
- if (fd == -1) {
- perrorf (g, "open: %s", filename);
- send_file_cancellation_sync (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);
- if (r == -1 && (errno == EINTR || errno == EAGAIN))
- continue;
- if (r <= 0) break;
- err = send_file_data_sync (g, buf, r);
- if (err < 0) {
- if (err == -2) /* daemon sent cancellation */
- send_file_cancellation_sync (g);
- return err;
- }
- }
-
- if (cancel) { /* cancel from either end */
- send_file_cancellation_sync (g);
- return -1;
- }
-
- if (r == -1) {
- perrorf (g, "read: %s", filename);
- send_file_cancellation_sync (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_sync (g);
- return -1;
- }
-
- return send_file_complete_sync (g);
-}
-
-/* Send a chunk of file data. */
-static int
-send_file_data_sync (guestfs_h *g, const char *buf, size_t len)
-{
- return send_file_chunk_sync (g, 0, buf, len);
-}
-
-/* Send a cancellation message. */
-static int
-send_file_cancellation_sync (guestfs_h *g)
-{
- return send_file_chunk_sync (g, 1, NULL, 0);
-}
-
-/* Send a file complete chunk. */
-static int
-send_file_complete_sync (guestfs_h *g)
-{
- char buf[1];
- return send_file_chunk_sync (g, 0, buf, 0);
-}
-
-/* Send a chunk, cancellation or end of file, synchronously (ie. wait
- * for it to go).
- */
-static int check_for_daemon_cancellation (guestfs_h *g);
-
-static int
-send_file_chunk_sync (guestfs_h *g, int cancel, const char *buf, size_t buflen)
-{
- u_int32_t len;
- int sent;
- guestfs_chunk chunk;
- XDR xdr;
- guestfs_main_loop *ml = guestfs_get_main_loop (g);
-
- if (g->state != BUSY) {
- error (g, _("send_file_chunk_sync: state %d != READY"), g->state);
- return -1;
- }
-
- /* This is probably an internal error. Or perhaps we should just
- * free the buffer anyway?
- */
- if (g->msg_out != NULL) {
- error (g, _("guestfs__send_sync: msg_out should be NULL"));
- return -1;
- }
-
- /* Did the daemon send a cancellation message? */
- if (check_for_daemon_cancellation (g)) {
- if (g->verbose)
- fprintf (stderr, "got daemon cancellation\n");
- return -2;
- }
-
- /* Allocate the chunk buffer. Don't use the stack to avoid
- * excessive stack usage and unnecessary copies.
- */
- g->msg_out = safe_malloc (g, GUESTFS_MAX_CHUNK_SIZE + 4 + 48);
- xdrmem_create (&xdr, g->msg_out + 4, GUESTFS_MAX_CHUNK_SIZE + 48, XDR_ENCODE);
-
- /* Serialize the chunk. */
- chunk.cancel = cancel;
- chunk.data.data_len = buflen;
- chunk.data.data_val = (char *) buf;
-
- if (!xdr_guestfs_chunk (&xdr, &chunk)) {
- error (g, _("xdr_guestfs_chunk failed (buf = %p, buflen = %zu)"),
- buf, buflen);
- xdr_destroy (&xdr);
- goto cleanup1;
- }
-
- len = xdr_getpos (&xdr);
- xdr_destroy (&xdr);
-
- /* Reduce the size of the outgoing message buffer to the real length. */
- g->msg_out = safe_realloc (g, g->msg_out, len + 4);
- g->msg_out_size = len + 4;
- g->msg_out_pos = 0;
-
- xdrmem_create (&xdr, g->msg_out, 4, XDR_ENCODE);
- xdr_uint32_t (&xdr, &len);
-
- if (guestfs__switch_to_sending (g) == -1)
- goto cleanup1;
-
- sent = 0;
- guestfs_set_send_callback (g, send_cb, &sent);
- if (ml->main_loop_run (ml, g) == -1)
- goto cleanup1;
- if (sent != 1) {
- error (g, _("send file chunk failed, see earlier error messages"));
- goto cleanup1;
- }
-
- return 0;
-
- cleanup1:
- free (g->msg_out);
- g->msg_out = NULL;
- g->msg_out_size = 0;
- return -1;
-}
-
-/* At this point we are sending FileIn file(s) to the guest, and not
- * expecting to read anything, so if we do read anything, it must be
- * a cancellation message. This checks for this case without blocking.
- */
-static int
-check_for_daemon_cancellation (guestfs_h *g)
-{
- fd_set rset;
- struct timeval tv;
- int r;
- char buf[4];
- uint32_t flag;
- XDR xdr;
-
- FD_ZERO (&rset);
- FD_SET (g->sock, &rset);
- tv.tv_sec = 0;
- tv.tv_usec = 0;
- r = select (g->sock+1, &rset, NULL, NULL, &tv);
- if (r == -1) {
- perrorf (g, "select");
- return 0;
- }
- if (r == 0)
- return 0;
-
- /* Read the message from the daemon. */
- r = xread (g->sock, buf, sizeof buf);
- if (r == -1) {
- perrorf (g, "read");
- return 0;
- }
-
- xdrmem_create (&xdr, buf, sizeof buf, XDR_DECODE);
- xdr_uint32_t (&xdr, &flag);
- xdr_destroy (&xdr);
-
- if (flag != GUESTFS_CANCEL_FLAG) {
- error (g, _("check_for_daemon_cancellation: read 0x%x from daemon, expected 0x%x\n"),
- flag, GUESTFS_CANCEL_FLAG);
- return 0;
- }
-
- return 1;
-}
-
-/* Synchronously receive a file. */
-
-/* Returns -1 = error, 0 = EOF, 1 = more data */
-static int receive_file_data_sync (guestfs_h *g, void **buf, size_t *len);
-
-int
-guestfs__receive_file_sync (guestfs_h *g, const char *filename)
-{
- void *buf;
- int fd, r;
- size_t len;
-
- fd = open (filename, O_WRONLY|O_CREAT|O_TRUNC|O_NOCTTY, 0666);
- if (fd == -1) {
- perrorf (g, "open: %s", filename);
- goto cancel;
- }
-
- /* Receive the file in chunked encoding. */
- while ((r = receive_file_data_sync (g, &buf, &len)) >= 0) {
- if (xwrite (fd, buf, len) == -1) {
- perrorf (g, "%s: write", filename);
- free (buf);
- goto cancel;
- }
- free (buf);
- if (r == 0) break; /* End of file. */
- }
-
- if (r == -1) {
- error (g, _("%s: error in chunked encoding"), filename);
- return -1;
- }
-
- if (close (fd) == -1) {
- perrorf (g, "close: %s", filename);
- return -1;
- }
-
- return 0;
-
- cancel: ;
- /* Send cancellation message to daemon, then wait until it
- * cancels (just throwing away data).
- */
- XDR xdr;
- char fbuf[4];
- uint32_t flag = GUESTFS_CANCEL_FLAG;
-
- if (g->verbose)
- fprintf (stderr, "%s: waiting for daemon to acknowledge cancellation\n",
- __func__);
-
- xdrmem_create (&xdr, fbuf, sizeof fbuf, XDR_ENCODE);
- xdr_uint32_t (&xdr, &flag);
- xdr_destroy (&xdr);
-
- if (xwrite (g->sock, fbuf, sizeof fbuf) == -1) {
- perrorf (g, _("write to daemon socket"));
- return -1;
- }
-
- while ((r = receive_file_data_sync (g, NULL, NULL)) > 0)
- ; /* just discard it */
-
- return -1;
-}
-
-/* Note that the reply callback can be called multiple times before
- * the main loop quits and we get back to the synchronous code. So
- * we have to be prepared to save multiple chunks on a list here.
- */
-struct receive_file_ctx {
- int count; /* 0 if receive_file_cb not called, or
- * else count number of chunks.
- */
- guestfs_chunk *chunks; /* Array of chunks. */
-};
-
-static void
-free_chunks (struct receive_file_ctx *ctx)
-{
- int i;
-
- for (i = 0; i < ctx->count; ++i)
- free (ctx->chunks[i].data.data_val);
-
- free (ctx->chunks);
-}
-
-static void
-receive_file_cb (guestfs_h *g, void *data, XDR *xdr)
-{
- guestfs_main_loop *ml = guestfs_get_main_loop (g);
- struct receive_file_ctx *ctx = (struct receive_file_ctx *) data;
- guestfs_chunk chunk;
-
- if (ctx->count == -1) /* Parse error occurred previously. */
- return;
-
- ml->main_loop_quit (ml, g);
-
- memset (&chunk, 0, sizeof chunk);
-
- if (!xdr_guestfs_chunk (xdr, &chunk)) {
- error (g, _("failed to parse file chunk"));
- free_chunks (ctx);
- ctx->chunks = NULL;
- ctx->count = -1;
- return;
- }
-
- /* Copy the chunk to the list. */
- ctx->chunks = safe_realloc (g, ctx->chunks,
- sizeof (guestfs_chunk) * (ctx->count+1));
- ctx->chunks[ctx->count] = chunk;
- ctx->count++;
-}
-
-/* Receive a chunk of file data. */
-/* Returns -1 = error, 0 = EOF, 1 = more data */
-static int
-receive_file_data_sync (guestfs_h *g, void **buf, size_t *len_r)
-{
- struct receive_file_ctx ctx;
- guestfs_main_loop *ml = guestfs_get_main_loop (g);
- int i;
- size_t len;
-
- ctx.count = 0;
- ctx.chunks = NULL;
-
- guestfs_set_reply_callback (g, receive_file_cb, &ctx);
- (void) ml->main_loop_run (ml, g);
- guestfs_set_reply_callback (g, NULL, NULL);
-
- if (ctx.count == 0) {
- error (g, _("receive_file_data_sync: reply callback not called\n"));
- return -1;
- }
-
- if (ctx.count == -1) {
- error (g, _("receive_file_data_sync: parse error in reply callback\n"));
- /* callback already freed the chunks */
- return -1;
- }
-
- if (g->verbose)
- fprintf (stderr, "receive_file_data_sync: got %d chunks\n", ctx.count);
-
- /* Process each chunk in the list. */
- if (buf) *buf = NULL; /* Accumulate data in this buffer. */
- len = 0;
-
- for (i = 0; i < ctx.count; ++i) {
- if (ctx.chunks[i].cancel) {
- error (g, _("file receive cancelled by daemon"));
- free_chunks (&ctx);
- if (buf) free (*buf);
- if (len_r) *len_r = 0;
- return -1;
- }
-
- if (ctx.chunks[i].data.data_len == 0) { /* end of transfer */
- free_chunks (&ctx);
- if (len_r) *len_r = len;
- return 0;
- }
-
- if (buf) {
- *buf = safe_realloc (g, *buf, len + ctx.chunks[i].data.data_len);
- memcpy (((char *)*buf)+len, ctx.chunks[i].data.data_val,
- ctx.chunks[i].data.data_len);
- }
- len += ctx.chunks[i].data.data_len;
- }
-
- if (len_r) *len_r = len;
- free_chunks (&ctx);
- return 1;
-}
-
-/* This is the default main loop implementation, using select(2). */
-
-static int
-select_add_handle (guestfs_main_loop *mlv, guestfs_h *g, int fd, int events,
- guestfs_handle_event_cb cb, void *data)
-{
- 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 ((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, &ml->rset) ||
- FD_ISSET (fd, &ml->wset) ||
- FD_ISSET (fd, &ml->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, &ml->rset);
- if ((events & GUESTFS_HANDLE_WRITABLE))
- FD_SET (fd, &ml->wset);
- if ((events & GUESTFS_HANDLE_HANGUP) || (events & GUESTFS_HANDLE_ERROR))
- FD_SET (fd, &ml->xset);
-
- 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));
- }
- ml->handle_cb_data[fd].cb = cb;
- ml->handle_cb_data[fd].g = g;
- ml->handle_cb_data[fd].data = data;
-
- 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_main_loop *mlv, guestfs_h *g, int fd)
-{
- 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, &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, &ml->rset);
- FD_CLR (fd, &ml->wset);
- FD_CLR (fd, &ml->xset);
-
- 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));
- }
-
- ml->nr_fds--;
-
- return 0;
-}
-
-static int
-__attribute__((noreturn))
-select_add_timeout (guestfs_main_loop *mlv, guestfs_h *g, int interval,
- guestfs_handle_timeout_cb cb, void *data)
-{
- //struct select_main_loop *ml = (struct select_main_loop *) mlv;
-
- abort (); /* XXX not implemented yet */
-}
-
-static int
-__attribute__((noreturn))
-select_remove_timeout (guestfs_main_loop *mlv, guestfs_h *g, int timer)
-{
- //struct select_main_loop *ml = (struct select_main_loop *) mlv;
-
- abort (); /* XXX not implemented yet */
-}
-
-/* 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)
-{
- struct select_main_loop *ml = (struct select_main_loop *) mlv;
- int fd, r, events;
- fd_set rset2, wset2, xset2;
-
- if (ml->is_running) {
- error (g, _("select_main_loop_run: this cannot be called recursively"));
- return -1;
- }
-
- ml->is_running = 1;
-
- while (ml->is_running) {
- if (ml->nr_fds == 0)
- break;
-
- rset2 = ml->rset;
- wset2 = ml->wset;
- xset2 = ml->xset;
- r = select (ml->max_fd+1, &rset2, &wset2, &xset2, NULL);
- if (r == -1) {
- if (errno == EINTR || errno == EAGAIN)
- continue;
- perrorf (g, "select");
- ml->is_running = 0;
- return -1;
- }
-
- for (fd = 0; r > 0 && fd <= ml->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--;
- 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 int
-select_main_loop_quit (guestfs_main_loop *mlv, guestfs_h *g)
-{
- struct select_main_loop *ml = (struct select_main_loop *) mlv;
-
- /* Note that legitimately ml->is_running can be zero when
- * this function is called.
- */
-
- ml->is_running = 0;
- return 0;
+ if (orig_size > buf_size)
+ fprintf (out,
+ _("<truncated, original size %zu bytes>"), orig_size);
}
git.annexia.org / libguestfs.git / blobdiff