#include <time.h>
#include <sys/stat.h>
#include <sys/select.h>
+#include <dirent.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
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);
}
int
+guestfs_add_drive_ro (guestfs_h *g, const char *filename)
+{
+ 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", filename);
+
+ return guestfs_config (g, "-drive", buf);
+}
+
+int
guestfs_add_cdrom (guestfs_h *g, const char *filename)
{
if (strchr (filename, ',') != NULL) {
return guestfs_config (g, "-cdrom", filename);
}
+/* Returns true iff file is contained in dir. */
+static int
+dir_contains_file (const char *dir, const char *file)
+{
+ 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;
+}
+
+/* Returns true iff every listed file is contained in 'dir'. */
+static int
+dir_contains_files (const char *dir, ...)
+{
+ 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;
+}
+
+static int build_supermin_appliance (guestfs_h *g, const char *path, char **kernel, char **initrd);
+
+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)
{
size_t len;
int wfd[2], rfd[2];
int tries;
- const char *kernel_name = "vmlinuz." REPO "." host_cpu;
- const char *initrd_name = "initramfs." REPO "." host_cpu ".img";
char *path, *pelem, *pend;
char *kernel = NULL, *initrd = NULL;
char unixsock[256];
return -1;
}
- /* Search g->path for the kernel and initrd. */
+ /* 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, ':');
*pend = '\0';
len = pend - pelem;
- /* Empty element or "." means cwd. */
+ /* Empty element of "." means cwd. */
if (len == 0 || (len == 1 && *pelem == '.')) {
if (g->verbose)
fprintf (stderr,
- "looking for kernel and initrd in current directory\n");
- if (access (kernel_name, F_OK) == 0 && access (initrd_name, F_OK) == 0) {
- kernel = safe_strdup (g, kernel_name);
- initrd = safe_strdup (g, initrd_name);
+ "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>/kernel etc. */
+ /* Look at <path>/supermin* etc. */
else {
- kernel = safe_malloc (g, len + strlen (kernel_name) + 2);
- initrd = safe_malloc (g, len + strlen (initrd_name) + 2);
- sprintf (kernel, "%s/%s", pelem, kernel_name);
- sprintf (initrd, "%s/%s", pelem, initrd_name);
-
if (g->verbose)
- fprintf (stderr, "looking for %s and %s\n", kernel, initrd);
+ fprintf (stderr, "looking for supermin appliance in %s\n", pelem);
- if (access (kernel, F_OK) == 0 && access (initrd, F_OK) == 0)
+ 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;
- free (kernel);
- free (initrd);
- kernel = initrd = NULL;
+ }
}
pelem = pend + 1;
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;
*/
memsize = 384;
- /* Make the temporary directory containing the socket. */
- if (!g->tmpdir) {
- g->tmpdir = safe_strdup (g, dir_template);
- if (mkdtemp (g->tmpdir) == NULL) {
- perrorf (g, _("%s: cannot create temporary directory"), dir_template);
- goto cleanup0;
- }
- }
-
+ /* Make the vmchannel socket. */
snprintf (unixsock, sizeof unixsock, "%s/sock", g->tmpdir);
unlink (unixsock);
add_cmdline (g, "-m");
add_cmdline (g, memsize_str);
-#if 0
- add_cmdline (g, "-no-kqemu"); /* Avoids a warning. */
-#endif
add_cmdline (g, "-no-reboot"); /* Force exit instead of reboot on panic */
add_cmdline (g, "-kernel");
add_cmdline (g, (char *) kernel);
return -1;
}
+/* 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)
+{
+ 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;
+ }
+
+ return 0;
+}
+
static void
finish_wait_ready (guestfs_h *g, void *vp)
{
git.annexia.org / libguestfs.git / blobdiff