#include <sys/stat.h>
#include <sys/select.h>
#include <dirent.h>
+#include <signal.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#define safe_strdup guestfs_safe_strdup
//#define safe_memdup guestfs_safe_memdup
+#ifdef __linux__
+#define CAN_CHECK_PEER_EUID 1
+#else
+#define CAN_CHECK_PEER_EUID 0
+#endif
+
static void default_error_cb (guestfs_h *g, void *data, const char *msg);
static int send_to_daemon (guestfs_h *g, const void *v_buf, size_t n);
static int recv_from_daemon (guestfs_h *g, uint32_t *size_rtn, void **buf_rtn);
static int accept_from_daemon (guestfs_h *g);
static int check_peer_euid (guestfs_h *g, int sock, uid_t *rtn);
static void close_handles (void);
+static int qemu_supports (guestfs_h *g, const char *option);
#define UNIX_PATH_MAX 108
+#ifndef MAX
+#define MAX(a,b) ((a)>(b)?(a):(b))
+#endif
+
+#ifdef __APPLE__
+#define xdr_uint32_t xdr_u_int32_t
+#endif
+
/* Also in guestfsd.c */
#define GUESTFWD_ADDR "10.0.2.4"
#define GUESTFWD_PORT "6666"
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. */
guestfs__add_drive_ro_with_if (guestfs_h *g, const char *filename,
const char *drive_if)
{
- size_t len = strlen (filename) + 64;
- char buf[len];
-
if (strchr (filename, ',') != NULL) {
error (g, _("filename cannot contain ',' (comma) character"));
return -1;
return -1;
}
- snprintf (buf, len, "file=%s,snapshot=on,if=%s", filename, drive_if);
+ if (qemu_supports (g, NULL) == -1)
+ return -1;
+
+ /* Only SCSI and virtio drivers support readonly mode.
+ * This is only supported as a QEMU feature since 2010/01.
+ */
+ int supports_ro = 0;
+ if ((STREQ (drive_if, "scsi") || STREQ (drive_if, "virtio")) &&
+ qemu_supports (g, "readonly=on"))
+ supports_ro = 1;
+
+ size_t len = strlen (filename) + 100;
+ char buf[len];
+
+ snprintf (buf, len, "file=%s,snapshot=on,%sif=%s",
+ filename,
+ supports_ro ? "readonly=on," : "",
+ drive_if);
return guestfs__config (g, "-drive", buf);
}
static void print_timestamped_message (guestfs_h *g, const char *fs, ...);
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 int is_openable (guestfs_h *g, const char *path, int flags);
static void print_cmdline (guestfs_h *g);
print_timestamped_message (g, "begin testing qemu features");
/* Get qemu help text and version. */
- if (test_qemu (g) == -1)
+ if (qemu_supports (g, NULL) == -1)
goto cleanup0;
/* Choose which vmchannel implementation to use. */
- if (qemu_supports (g, "-net user")) {
+ if (CAN_CHECK_PEER_EUID && qemu_supports (g, "-net user")) {
/* The "null vmchannel" implementation. Requires SLIRP (user mode
* networking in qemu) but no other vmchannel support. The daemon
* will connect back to a random port number on localhost.
if (dup (wfd[0]) == -1) {
dup_failed:
perror ("dup failed");
- _exit (1);
+ _exit (EXIT_FAILURE);
}
if (dup (rfd[1]) == -1)
goto dup_failed;
execv (g->qemu, g->cmdline); /* Run qemu. */
perror (g->qemu);
- _exit (1);
+ _exit (EXIT_FAILURE);
}
/* Parent (library). */
*/
for (;;) {
if (kill (qemu_pid, 0) == -1) /* qemu's gone away, we aren't needed */
- _exit (0);
+ _exit (EXIT_SUCCESS);
if (kill (parent_pid, 0) == -1) {
/* Parent's gone away, qemu still around, so kill qemu. */
kill (qemu_pid, 9);
- _exit (0);
+ _exit (EXIT_SUCCESS);
}
sleep (2);
}
snprintf (cmd, sizeof cmd,
"PATH='%s':$PATH "
- "libguestfs-supermin-helper '%s' " host_cpu " " REPO " %s %s",
+ "libguestfs-supermin-helper%s '%s' " host_cpu " " REPO " %s %s",
path,
+ g->verbose ? " --verbose" : "",
path, *kernel, *initrd);
if (g->verbose)
print_timestamped_message (g, "%s", cmd);
va_list args;
char *msg;
int err;
- struct timeval tv, diff;
+ struct timeval tv;
va_start (args, fs);
err = vasprintf (&msg, fs, args);
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, "LC_ALL=C '%s' -help", g->qemu);
+ snprintf (cmd, sizeof cmd, "LC_ALL=C '%s' -nographic -help", g->qemu);
fp = popen (cmd, "r");
/* qemu -help should always work (qemu -version OTOH wasn't
if (pclose (fp) == -1)
goto error;
- snprintf (cmd, sizeof cmd, "LC_ALL=C '%s' -version 2>/dev/null", g->qemu);
+ snprintf (cmd, sizeof cmd, "LC_ALL=C '%s' -nographic -version 2>/dev/null",
+ g->qemu);
fp = popen (cmd, "r");
if (fp) {
/* Test if option is supported by qemu command line (just by grepping
* the help text).
+ *
+ * The first time this is used, it has to run the external qemu
+ * binary. If that fails, it returns -1.
+ *
+ * To just do the first-time run of the qemu binary, call this with
+ * option == NULL, in which case it will return -1 if there was an
+ * error doing that.
*/
static int
qemu_supports (guestfs_h *g, const char *option)
{
- return g->qemu_help && strstr (g->qemu_help, option) != NULL;
+ if (!g->qemu_help) {
+ if (test_qemu (g) == -1)
+ return -1;
+ }
+
+ if (option == NULL)
+ return 1;
+
+ return strstr (g->qemu_help, option) != NULL;
}
/* Check if a file can be opened. */
static int
check_peer_euid (guestfs_h *g, int sock, uid_t *rtn)
{
+#if CAN_CHECK_PEER_EUID
struct sockaddr_in peer;
socklen_t addrlen = sizeof peer;
error (g, "check_peer_euid: no matching TCP connection found in /proc/net/tcp");
fclose (fp);
return -1;
+#else /* !CAN_CHECK_PEER_EUID */
+ /* This function exists but should never be called in this
+ * configuration.
+ */
+ abort ();
+#endif /* !CAN_CHECK_PEER_EUID */
}
/* You had to call this function after launch in versions <= 1.0.70,
{
void *buf;
int fd, r;
- size_t len;
fd = open (filename, O_WRONLY|O_CREAT|O_TRUNC|O_NOCTTY, 0666);
if (fd == -1) {
git.annexia.org / libguestfs.git / blobdiff