2 * Copyright (C) 2009-2010 Red Hat Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #define _BSD_SOURCE /* for mkdtemp, usleep */
34 #include <sys/select.h>
38 #include <rpc/types.h>
45 #ifdef HAVE_SYS_TYPES_H
46 #include <sys/types.h>
49 #ifdef HAVE_SYS_WAIT_H
53 #ifdef HAVE_SYS_SOCKET_H
54 #include <sys/socket.h>
61 #include <arpa/inet.h>
62 #include <netinet/in.h>
65 #include "glthread/lock.h"
66 #include "ignore-value.h"
69 #include "guestfs-internal.h"
70 #include "guestfs-internal-actions.h"
71 #include "guestfs_protocol.h"
73 static int check_peer_euid (guestfs_h *g, int sock, uid_t *rtn);
74 static int qemu_supports (guestfs_h *g, const char *option);
76 /* Add a string to the current command line. */
78 incr_cmdline_size (guestfs_h *g)
80 if (g->cmdline == NULL) {
81 /* g->cmdline[0] is reserved for argv[0], set in guestfs_launch. */
83 g->cmdline = safe_malloc (g, sizeof (char *));
88 g->cmdline = safe_realloc (g, g->cmdline, sizeof (char *) * g->cmdline_size);
92 add_cmdline (guestfs_h *g, const char *str)
94 if (g->state != CONFIG) {
96 _("command line cannot be altered after qemu subprocess launched"));
100 incr_cmdline_size (g);
101 g->cmdline[g->cmdline_size-1] = safe_strdup (g, str);
106 guestfs__config (guestfs_h *g,
107 const char *qemu_param, const char *qemu_value)
109 if (qemu_param[0] != '-') {
110 error (g, _("guestfs_config: parameter must begin with '-' character"));
114 /* A bit fascist, but the user will probably break the extra
115 * parameters that we add if they try to set any of these.
117 if (STREQ (qemu_param, "-kernel") ||
118 STREQ (qemu_param, "-initrd") ||
119 STREQ (qemu_param, "-nographic") ||
120 STREQ (qemu_param, "-serial") ||
121 STREQ (qemu_param, "-full-screen") ||
122 STREQ (qemu_param, "-std-vga") ||
123 STREQ (qemu_param, "-vnc")) {
124 error (g, _("guestfs_config: parameter '%s' isn't allowed"), qemu_param);
128 if (add_cmdline (g, qemu_param) != 0) return -1;
130 if (qemu_value != NULL) {
131 if (add_cmdline (g, qemu_value) != 0) return -1;
138 guestfs__add_drive_with_if (guestfs_h *g, const char *filename,
139 const char *drive_if)
141 size_t len = strlen (filename) + 64;
144 if (strchr (filename, ',') != NULL) {
145 error (g, _("filename cannot contain ',' (comma) character"));
149 /* cache=off improves reliability in the event of a host crash.
151 * However this option causes qemu to try to open the file with
152 * O_DIRECT. This fails on some filesystem types (notably tmpfs).
153 * So we check if we can open the file with or without O_DIRECT,
154 * and use cache=off (or not) accordingly.
156 * This test also checks for the presence of the file, which
157 * is a documented semantic of this interface.
159 int fd = open (filename, O_RDONLY|O_DIRECT);
162 snprintf (buf, len, "file=%s,cache=off,if=%s", filename, drive_if);
164 fd = open (filename, O_RDONLY);
167 snprintf (buf, len, "file=%s,if=%s", filename, drive_if);
169 perrorf (g, "%s", filename);
174 return guestfs__config (g, "-drive", buf);
178 guestfs__add_drive_ro_with_if (guestfs_h *g, const char *filename,
179 const char *drive_if)
181 if (strchr (filename, ',') != NULL) {
182 error (g, _("filename cannot contain ',' (comma) character"));
186 if (access (filename, F_OK) == -1) {
187 perrorf (g, "%s", filename);
191 size_t len = strlen (filename) + 64;
194 snprintf (buf, len, "file=%s,snapshot=on,if=%s", filename, drive_if);
196 return guestfs__config (g, "-drive", buf);
200 guestfs__add_drive (guestfs_h *g, const char *filename)
202 return guestfs__add_drive_with_if (g, filename, DRIVE_IF);
206 guestfs__add_drive_ro (guestfs_h *g, const char *filename)
208 return guestfs__add_drive_ro_with_if (g, filename, DRIVE_IF);
212 guestfs__add_cdrom (guestfs_h *g, const char *filename)
214 if (strchr (filename, ',') != NULL) {
215 error (g, _("filename cannot contain ',' (comma) character"));
219 if (access (filename, F_OK) == -1) {
220 perrorf (g, "%s", filename);
224 return guestfs__config (g, "-cdrom", filename);
227 static int is_openable (guestfs_h *g, const char *path, int flags);
228 static void print_cmdline (guestfs_h *g);
231 guestfs__launch (guestfs_h *g)
236 int null_vmchannel_sock;
238 struct sockaddr_un addr;
242 error (g, _("you must call guestfs_add_drive before guestfs_launch"));
246 if (g->state != CONFIG) {
247 error (g, _("the libguestfs handle has already been launched"));
251 /* Start the clock ... */
252 gettimeofday (&g->launch_t, NULL);
254 /* Make the temporary directory. */
256 const char *tmpdir = guestfs___tmpdir ();
257 char dir_template[strlen (tmpdir) + 32];
258 sprintf (dir_template, "%s/libguestfsXXXXXX", tmpdir);
260 g->tmpdir = safe_strdup (g, dir_template);
261 if (mkdtemp (g->tmpdir) == NULL) {
262 perrorf (g, _("%s: cannot create temporary directory"), dir_template);
267 /* Allow anyone to read the temporary directory. The socket in this
268 * directory won't be readable but anyone can see it exists if they
269 * want. (RHBZ#610880).
271 if (chmod (g->tmpdir, 0755) == -1)
272 fprintf (stderr, "chmod: %s: %m (ignored)\n", g->tmpdir);
274 /* Locate and/or build the appliance. */
275 char *kernel = NULL, *initrd = NULL, *appliance = NULL;
276 if (guestfs___build_appliance (g, &kernel, &initrd, &appliance) == -1)
280 guestfs___print_timestamped_message (g, "begin testing qemu features");
282 /* Get qemu help text and version. */
283 if (qemu_supports (g, NULL) == -1)
286 /* Choose which vmchannel implementation to use. */
287 if (CAN_CHECK_PEER_EUID && qemu_supports (g, "-net user")) {
288 /* The "null vmchannel" implementation. Requires SLIRP (user mode
289 * networking in qemu) but no other vmchannel support. The daemon
290 * will connect back to a random port number on localhost.
292 struct sockaddr_in addr;
293 socklen_t addrlen = sizeof addr;
295 g->sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
297 perrorf (g, "socket");
300 addr.sin_family = AF_INET;
301 addr.sin_port = htons (0);
302 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
303 if (bind (g->sock, (struct sockaddr *) &addr, addrlen) == -1) {
308 if (listen (g->sock, 256) == -1) {
309 perrorf (g, "listen");
313 if (getsockname (g->sock, (struct sockaddr *) &addr, &addrlen) == -1) {
314 perrorf (g, "getsockname");
318 if (fcntl (g->sock, F_SETFL, O_NONBLOCK) == -1) {
319 perrorf (g, "fcntl");
323 null_vmchannel_sock = ntohs (addr.sin_port);
325 fprintf (stderr, "null_vmchannel_sock = %d\n", null_vmchannel_sock);
327 /* Using some vmchannel impl. We need to create a local Unix
328 * domain socket for qemu to use.
330 snprintf (unixsock, sizeof unixsock, "%s/sock", g->tmpdir);
332 null_vmchannel_sock = 0;
336 if (pipe (wfd) == -1 || pipe (rfd) == -1) {
343 guestfs___print_timestamped_message (g, "finished testing qemu features");
357 if (r == 0) { /* Child (qemu). */
359 const char *vmchannel = NULL;
361 /* Set up the full command line. Do this in the subprocess so we
362 * don't need to worry about cleaning up.
364 g->cmdline[0] = g->qemu;
366 /* qemu sometimes needs this option to enable hardware
367 * virtualization, but some versions of 'qemu-kvm' will use KVM
368 * regardless (even where this option appears in the help text).
369 * It is rumoured that there are versions of qemu where supplying
370 * this option when hardware virtualization is not available will
371 * cause qemu to fail, so we we have to check at least that
372 * /dev/kvm is openable. That's not reliable, since /dev/kvm
373 * might be openable by qemu but not by us (think: SELinux) in
374 * which case the user would not get hardware virtualization,
375 * although at least shouldn't fail. A giant clusterfuck with the
376 * qemu command line, again.
378 if (qemu_supports (g, "-enable-kvm") &&
379 is_openable (g, "/dev/kvm", O_RDWR))
380 add_cmdline (g, "-enable-kvm");
382 /* Newer versions of qemu (from around 2009/12) changed the
383 * behaviour of monitors so that an implicit '-monitor stdio' is
384 * assumed if we are in -nographic mode and there is no other
385 * -monitor option. Only a single stdio device is allowed, so
386 * this broke the '-serial stdio' option. There is a new flag
387 * called -nodefaults which gets rid of all this default crud, so
388 * let's use that to avoid this and any future surprises.
390 if (qemu_supports (g, "-nodefaults"))
391 add_cmdline (g, "-nodefaults");
393 add_cmdline (g, "-nographic");
394 add_cmdline (g, "-serial");
395 add_cmdline (g, "stdio");
397 snprintf (buf, sizeof buf, "%d", g->memsize);
398 add_cmdline (g, "-m");
399 add_cmdline (g, buf);
401 /* Force exit instead of reboot on panic */
402 add_cmdline (g, "-no-reboot");
404 /* These options recommended by KVM developers to improve reliability. */
405 if (qemu_supports (g, "-no-hpet"))
406 add_cmdline (g, "-no-hpet");
408 if (qemu_supports (g, "-rtc-td-hack"))
409 add_cmdline (g, "-rtc-td-hack");
411 /* If qemu has SLIRP (user mode network) enabled then we can get
412 * away with "no vmchannel", where we just connect back to a random
415 if (null_vmchannel_sock) {
416 add_cmdline (g, "-net");
417 add_cmdline (g, "user,vlan=0,net=" NETWORK);
419 snprintf (buf, sizeof buf,
420 "guestfs_vmchannel=tcp:" ROUTER ":%d",
421 null_vmchannel_sock);
422 vmchannel = strdup (buf);
425 /* New-style -net user,guestfwd=... syntax for guestfwd. See:
427 * http://git.savannah.gnu.org/cgit/qemu.git/commit/?id=c92ef6a22d3c71538fcc48fb61ad353f7ba03b62
429 * The original suggested format doesn't work, see:
431 * http://lists.gnu.org/archive/html/qemu-devel/2009-07/msg01654.html
433 * However Gerd Hoffman privately suggested to me using -chardev
434 * instead, which does work.
436 else if (qemu_supports (g, "-chardev") && qemu_supports (g, "guestfwd")) {
437 snprintf (buf, sizeof buf,
438 "socket,id=guestfsvmc,path=%s,server,nowait", unixsock);
440 add_cmdline (g, "-chardev");
441 add_cmdline (g, buf);
443 snprintf (buf, sizeof buf,
444 "user,vlan=0,net=" NETWORK ","
445 "guestfwd=tcp:" GUESTFWD_ADDR ":" GUESTFWD_PORT
446 "-chardev:guestfsvmc");
448 add_cmdline (g, "-net");
449 add_cmdline (g, buf);
451 vmchannel = "guestfs_vmchannel=tcp:" GUESTFWD_ADDR ":" GUESTFWD_PORT;
454 /* Not guestfwd. HOPEFULLY this qemu uses the older -net channel
455 * syntax, or if not then we'll get a quick failure.
458 snprintf (buf, sizeof buf,
459 "channel," GUESTFWD_PORT ":unix:%s,server,nowait", unixsock);
461 add_cmdline (g, "-net");
462 add_cmdline (g, buf);
463 add_cmdline (g, "-net");
464 add_cmdline (g, "user,vlan=0,net=" NETWORK);
466 vmchannel = "guestfs_vmchannel=tcp:" GUESTFWD_ADDR ":" GUESTFWD_PORT;
468 add_cmdline (g, "-net");
469 add_cmdline (g, "nic,model=" NET_IF ",vlan=0");
471 #define LINUX_CMDLINE \
472 "panic=1 " /* force kernel to panic if daemon exits */ \
473 "console=ttyS0 " /* serial console */ \
474 "udevtimeout=300 " /* good for very slow systems (RHBZ#480319) */ \
475 "noapic " /* workaround for RHBZ#502058 - ok if not SMP */ \
476 "acpi=off " /* we don't need ACPI, turn it off */ \
477 "printk.time=1 " /* display timestamp before kernel messages */ \
478 "cgroup_disable=memory " /* saves us about 5 MB of RAM */
480 /* Linux kernel command line. */
481 snprintf (buf, sizeof buf,
483 "%s " /* (selinux) */
484 "%s " /* (vmchannel) */
485 "%s " /* (verbose) */
486 "TERM=%s " /* (TERM environment variable) */
488 g->selinux ? "selinux=1 enforcing=0" : "selinux=0",
489 vmchannel ? vmchannel : "",
490 g->verbose ? "guestfs_verbose=1" : "",
491 getenv ("TERM") ? : "linux",
492 g->append ? g->append : "");
494 add_cmdline (g, "-kernel");
495 add_cmdline (g, kernel);
496 add_cmdline (g, "-initrd");
497 add_cmdline (g, initrd);
498 add_cmdline (g, "-append");
499 add_cmdline (g, buf);
501 /* Add the ext2 appliance drive (last of all). */
503 const char *cachemode = "";
504 if (qemu_supports (g, "cache=")) {
505 if (qemu_supports (g, "unsafe"))
506 cachemode = ",cache=unsafe";
507 else if (qemu_supports (g, "writeback"))
508 cachemode = ",cache=writeback";
511 char buf2[PATH_MAX + 64];
512 add_cmdline (g, "-drive");
513 snprintf (buf2, sizeof buf2, "file=%s,snapshot=on,if=" DRIVE_IF "%s",
514 appliance, cachemode);
515 add_cmdline (g, buf2);
518 /* Finish off the command line. */
519 incr_cmdline_size (g);
520 g->cmdline[g->cmdline_size-1] = NULL;
526 /* Set up stdin, stdout. */
532 if (dup (wfd[0]) == -1) {
534 perror ("dup failed");
535 _exit (EXIT_FAILURE);
537 if (dup (rfd[1]) == -1)
545 /* Set up a new process group, so we can signal this process
546 * and all subprocesses (eg. if qemu is really a shell script).
551 setenv ("LC_ALL", "C", 1);
553 execv (g->qemu, g->cmdline); /* Run qemu. */
555 _exit (EXIT_FAILURE);
558 /* Parent (library). */
566 /* Fork the recovery process off which will kill qemu if the parent
567 * process fails to do so (eg. if the parent segfaults).
570 if (g->recovery_proc) {
573 pid_t qemu_pid = g->pid;
574 pid_t parent_pid = getppid ();
576 /* Writing to argv is hideously complicated and error prone. See:
577 * http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/ps_status.c?rev=1.33.2.1;content-type=text%2Fplain
580 /* Loop around waiting for one or both of the other processes to
581 * disappear. It's fair to say this is very hairy. The PIDs that
582 * we are looking at might be reused by another process. We are
583 * effectively polling. Is the cure worse than the disease?
586 if (kill (qemu_pid, 0) == -1) /* qemu's gone away, we aren't needed */
587 _exit (EXIT_SUCCESS);
588 if (kill (parent_pid, 0) == -1) {
589 /* Parent's gone away, qemu still around, so kill qemu. */
591 _exit (EXIT_SUCCESS);
597 /* Don't worry, if the fork failed, this will be -1. The recovery
598 * process isn't essential.
604 /* Close the other ends of the pipe. */
608 if (fcntl (wfd[1], F_SETFL, O_NONBLOCK) == -1 ||
609 fcntl (rfd[0], F_SETFL, O_NONBLOCK) == -1) {
610 perrorf (g, "fcntl");
614 g->fd[0] = wfd[1]; /* stdin of child */
615 g->fd[1] = rfd[0]; /* stdout of child */
617 g->fd[0] = open ("/dev/null", O_RDWR);
618 if (g->fd[0] == -1) {
619 perrorf (g, "open /dev/null");
622 g->fd[1] = dup (g->fd[0]);
623 if (g->fd[1] == -1) {
630 if (null_vmchannel_sock) {
634 /* Null vmchannel implementation: We listen on g->sock for a
635 * connection. The connection could come from any local process
636 * so we must check it comes from the appliance (or at least
637 * from our UID) for security reasons.
640 sock = guestfs___accept_from_daemon (g);
644 if (check_peer_euid (g, sock, &uid) == -1)
646 if (uid != geteuid ()) {
648 "libguestfs: warning: unexpected connection from UID %d to port %d\n",
649 uid, null_vmchannel_sock);
656 if (fcntl (sock, F_SETFL, O_NONBLOCK) == -1) {
657 perrorf (g, "fcntl");
664 /* Other vmchannel. Open the Unix socket.
666 * The vmchannel implementation that got merged with qemu sucks in
667 * a number of ways. Both ends do connect(2), which means that no
668 * one knows what, if anything, is connected to the other end, or
669 * if it becomes disconnected. Even worse, we have to wait some
670 * indeterminate time for qemu to create the socket and connect to
671 * it (which happens very early in qemu's start-up), so any code
672 * that uses vmchannel is inherently racy. Hence this silly loop.
674 g->sock = socket (AF_UNIX, SOCK_STREAM, 0);
676 perrorf (g, "socket");
680 if (fcntl (g->sock, F_SETFL, O_NONBLOCK) == -1) {
681 perrorf (g, "fcntl");
685 addr.sun_family = AF_UNIX;
686 strncpy (addr.sun_path, unixsock, UNIX_PATH_MAX);
687 addr.sun_path[UNIX_PATH_MAX-1] = '\0';
690 /* Always sleep at least once to give qemu a small chance to start up. */
693 r = connect (g->sock, (struct sockaddr *) &addr, sizeof addr);
694 if ((r == -1 && errno == EINPROGRESS) || r == 0)
698 perrorf (g, "connect");
703 error (g, _("failed to connect to vmchannel socket"));
709 g->state = LAUNCHING;
711 /* Wait for qemu to start and to connect back to us via vmchannel and
712 * send the GUESTFS_LAUNCH_FLAG message.
716 r = guestfs___recv_from_daemon (g, &size, &buf);
719 if (r == -1) return -1;
721 if (size != GUESTFS_LAUNCH_FLAG) {
722 error (g, _("guestfs_launch failed, see earlier error messages"));
727 guestfs___print_timestamped_message (g, "appliance is up");
729 /* This is possible in some really strange situations, such as
730 * guestfsd starts up OK but then qemu immediately exits. Check for
731 * it because the caller is probably expecting to be able to send
732 * commands after this function returns.
734 if (g->state != READY) {
735 error (g, _("qemu launched and contacted daemon, but state != READY"));
746 if (g->pid > 0) kill (g->pid, 9);
747 if (g->recoverypid > 0) kill (g->recoverypid, 9);
748 waitpid (g->pid, NULL, 0);
749 if (g->recoverypid > 0) waitpid (g->recoverypid, NULL, 0);
754 memset (&g->launch_t, 0, sizeof g->launch_t);
769 guestfs___tmpdir (void)
779 const char *t = getenv ("TMPDIR");
785 /* This function is used to print the qemu command line before it gets
786 * executed, when in verbose mode.
789 print_cmdline (guestfs_h *g)
794 while (g->cmdline[i]) {
795 if (g->cmdline[i][0] == '-') /* -option starts a new line */
796 fprintf (stderr, " \\\n ");
798 if (i > 0) fputc (' ', stderr);
800 /* Does it need shell quoting? This only deals with simple cases. */
801 needs_quote = strcspn (g->cmdline[i], " ") != strlen (g->cmdline[i]);
803 if (needs_quote) fputc ('\'', stderr);
804 fprintf (stderr, "%s", g->cmdline[i]);
805 if (needs_quote) fputc ('\'', stderr);
809 fputc ('\n', stderr);
812 /* Compute Y - X and return the result in milliseconds.
813 * Approximately the same as this code:
814 * http://www.mpp.mpg.de/~huber/util/timevaldiff.c
817 timeval_diff (const struct timeval *x, const struct timeval *y)
821 msec = (y->tv_sec - x->tv_sec) * 1000;
822 msec += (y->tv_usec - x->tv_usec) / 1000;
827 guestfs___print_timestamped_message (guestfs_h *g, const char *fs, ...)
835 err = vasprintf (&msg, fs, args);
840 gettimeofday (&tv, NULL);
842 fprintf (stderr, "[%05" PRIi64 "ms] %s\n",
843 timeval_diff (&g->launch_t, &tv), msg);
848 static int read_all (guestfs_h *g, FILE *fp, char **ret);
850 /* Test qemu binary (or wrapper) runs, and do 'qemu -help' and
851 * 'qemu -version' so we know what options this qemu supports and
855 test_qemu (guestfs_h *g)
860 snprintf (cmd, sizeof cmd, "LC_ALL=C '%s' -nographic -help", g->qemu);
862 fp = popen (cmd, "r");
863 /* qemu -help should always work (qemu -version OTOH wasn't
864 * supported by qemu 0.9). If this command doesn't work then it
865 * probably indicates that the qemu binary is missing.
868 /* XXX This error is never printed, even if the qemu binary
869 * doesn't exist. Why?
872 perrorf (g, _("%s: command failed: If qemu is located on a non-standard path, try setting the LIBGUESTFS_QEMU environment variable."), cmd);
876 if (read_all (g, fp, &g->qemu_help) == -1)
879 if (pclose (fp) == -1)
882 snprintf (cmd, sizeof cmd, "LC_ALL=C '%s' -nographic -version 2>/dev/null",
885 fp = popen (cmd, "r");
887 /* Intentionally ignore errors. */
888 read_all (g, fp, &g->qemu_version);
896 read_all (guestfs_h *g, FILE *fp, char **ret)
903 *ret = safe_realloc (g, *ret, n + 1);
908 *ret = safe_realloc (g, *ret, n + BUFSIZ);
910 r = fread (p, 1, BUFSIZ, fp);
919 /* Test if option is supported by qemu command line (just by grepping
922 * The first time this is used, it has to run the external qemu
923 * binary. If that fails, it returns -1.
925 * To just do the first-time run of the qemu binary, call this with
926 * option == NULL, in which case it will return -1 if there was an
930 qemu_supports (guestfs_h *g, const char *option)
933 if (test_qemu (g) == -1)
940 return strstr (g->qemu_help, option) != NULL;
943 /* Check if a file can be opened. */
945 is_openable (guestfs_h *g, const char *path, int flags)
947 int fd = open (path, flags);
957 /* Check the peer effective UID for a TCP socket. Ideally we'd like
958 * SO_PEERCRED for a loopback TCP socket. This isn't possible on
959 * Linux (but it is on Solaris!) so we read /proc/net/tcp instead.
962 check_peer_euid (guestfs_h *g, int sock, uid_t *rtn)
964 #if CAN_CHECK_PEER_EUID
965 struct sockaddr_in peer;
966 socklen_t addrlen = sizeof peer;
968 if (getpeername (sock, (struct sockaddr *) &peer, &addrlen) == -1) {
969 perrorf (g, "getpeername");
973 if (peer.sin_family != AF_INET ||
974 ntohl (peer.sin_addr.s_addr) != INADDR_LOOPBACK) {
975 error (g, "check_peer_euid: unexpected connection from non-IPv4, non-loopback peer (family = %d, addr = %s)",
976 peer.sin_family, inet_ntoa (peer.sin_addr));
980 struct sockaddr_in our;
981 addrlen = sizeof our;
982 if (getsockname (sock, (struct sockaddr *) &our, &addrlen) == -1) {
983 perrorf (g, "getsockname");
987 FILE *fp = fopen ("/proc/net/tcp", "r");
989 perrorf (g, "/proc/net/tcp");
994 if (fgets (line, sizeof line, fp) == NULL) { /* Drop first line. */
995 error (g, "unexpected end of file in /proc/net/tcp");
1000 while (fgets (line, sizeof line, fp) != NULL) {
1001 unsigned line_our_addr, line_our_port, line_peer_addr, line_peer_port;
1002 int dummy0, dummy1, dummy2, dummy3, dummy4, dummy5, dummy6;
1005 if (sscanf (line, "%d:%08X:%04X %08X:%04X %02X %08X:%08X %02X:%08X %08X %d",
1007 &line_our_addr, &line_our_port,
1008 &line_peer_addr, &line_peer_port,
1009 &dummy1, &dummy2, &dummy3, &dummy4, &dummy5, &dummy6,
1011 /* Note about /proc/net/tcp: local_address and rem_address are
1012 * always in network byte order. However the port part is
1013 * always in host byte order.
1015 * The sockname and peername that we got above are in network
1016 * byte order. So we have to byte swap the port but not the
1019 if (line_our_addr == our.sin_addr.s_addr &&
1020 line_our_port == ntohs (our.sin_port) &&
1021 line_peer_addr == peer.sin_addr.s_addr &&
1022 line_peer_port == ntohs (peer.sin_port)) {
1030 error (g, "check_peer_euid: no matching TCP connection found in /proc/net/tcp");
1033 #else /* !CAN_CHECK_PEER_EUID */
1034 /* This function exists but should never be called in this
1038 #endif /* !CAN_CHECK_PEER_EUID */
1041 /* You had to call this function after launch in versions <= 1.0.70,
1042 * but it is now a no-op.
1045 guestfs__wait_ready (guestfs_h *g)
1047 if (g->state != READY) {
1048 error (g, _("qemu has not been launched yet"));
1056 guestfs__kill_subprocess (guestfs_h *g)
1058 if (g->state == CONFIG) {
1059 error (g, _("no subprocess to kill"));
1064 fprintf (stderr, "sending SIGTERM to process %d\n", g->pid);
1066 if (g->pid > 0) kill (g->pid, SIGTERM);
1067 if (g->recoverypid > 0) kill (g->recoverypid, 9);
1072 /* Access current state. */
1074 guestfs__is_config (guestfs_h *g)
1076 return g->state == CONFIG;
1080 guestfs__is_launching (guestfs_h *g)
1082 return g->state == LAUNCHING;
1086 guestfs__is_ready (guestfs_h *g)
1088 return g->state == READY;
1092 guestfs__is_busy (guestfs_h *g)
1094 return g->state == BUSY;
1098 guestfs__get_state (guestfs_h *g)