#include <config.h>
+#define _GNU_SOURCE // for strchrnul
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <fcntl.h>
#include <getopt.h>
+#include <inttypes.h>
+#include <assert.h>
#include <guestfs.h>
static void script (int prompt);
static void cmdline (char *argv[], int optind, int argc);
static int issue_command (const char *cmd, char *argv[]);
+static int parse_size (const char *str, off_t *size_rtn);
/* Currently open libguestfs handle. */
guestfs_h *g;
int verbose = 0;
int
-launch (void)
+launch (guestfs_h *_g)
{
+ assert (_g == g);
+
if (!g_launched) {
if (guestfs_launch (g) == -1)
return -1;
" ...\n"
" EOF\n"
"Options:\n"
- " -h|--cmd-help List available commands\n"
- " -h|--cmd-help cmd Display detailed help on 'cmd'\n"
- " -a image Add image\n"
- " -m dev[:mnt] Mount dev on mnt (if omitted, /)\n"
- /*" --ro|-r All mounts are read-only\n"*/
- " -v|--verbose Verbose messages\n"
- "For more information, see the manpage guestfish(1).\n");
+ " -h|--cmd-help List available commands\n"
+ " -h|--cmd-help cmd Display detailed help on 'cmd'\n"
+ " -a|--add image Add image\n"
+ " -m|--mount dev[:mnt] Mount dev on mnt (if omitted, /)\n"
+ " -n|--no-sync Don't autosync\n"
+ /*" --ro|-r All mounts are read-only\n"*/
+ " -v|--verbose Verbose messages\n"
+ "For more information, see the manpage guestfish(1).\n");
}
int
{ "cmd-help", 2, 0, 'h' },
{ "help", 0, 0, '?' },
{ "mount", 1, 0, 'm' },
+ { "no-sync", 0, 0, 'n' },
{ "verbose", 0, 0, 'v' },
{ 0, 0, 0, 0 }
};
exit (1);
}
+ guestfs_set_autosync (g, 1);
+
+ /* If developing, add . to the path. Note that libtools interferes
+ * with this because uninstalled guestfish is a shell script that runs
+ * the real program with an absolute path. Detect that too.
+ */
+ if (argv[0] &&
+ (argv[0][0] != '/' || strstr (argv[0], "/.libs/lt-") != NULL))
+ guestfs_set_path (g, ".:" GUESTFS_DEFAULT_PATH);
+
for (;;) {
c = getopt_long (argc, argv, options, long_options, NULL);
if (c == -1) break;
mp->mountpoint = "/";
mp->device = optarg;
mp->next = mps;
- mps = mp->next;
+ mps = mp;
+ break;
+
+ case 'n':
+ guestfs_set_autosync (g, 0);
break;
case 'v':
/* If we've got mountpoints, we must launch the guest and mount them. */
if (mps != NULL) {
- if (launch () == -1) exit (1);
+ if (launch (g) == -1) exit (1);
mount_mps (mps);
}
exit (1);
}
- (void) issue_command (cmd, argv);
+ if (issue_command (cmd, argv) == -1) {
+ if (!prompt) exit (1);
+ }
}
if (prompt) printf ("\n");
}
}
else if (strcasecmp (cmd, "quit") == 0 ||
strcasecmp (cmd, "exit") == 0 ||
- strcasecmp (cmd, "q") == 0)
- exit (0);
- else if (strcasecmp (cmd, "add") == 0 ||
- strcasecmp (cmd, "drive") == 0 ||
- strcasecmp (cmd, "add_drive") == 0) {
- if (argc != 1) {
- fprintf (stderr, "use 'add image' to add a guest image\n");
- return -1;
- }
- else
- return guestfs_add_drive (g, argv[0]);
+ strcasecmp (cmd, "q") == 0) {
+ quit = 1;
+ return 0;
}
- else if (strcasecmp (cmd, "cdrom") == 0) {
- if (argc != 1) {
- fprintf (stderr, "use 'cdrom image' to add a CD-ROM image\n");
+ else if (strcasecmp (cmd, "alloc") == 0 ||
+ strcasecmp (cmd, "allocate") == 0) {
+ if (argc != 2) {
+ fprintf (stderr, "use 'alloc file size' to create an image\n");
return -1;
}
- else
- return guestfs_add_cdrom (g, argv[0]);
- }
- else if (strcasecmp (cmd, "launch") == 0) {
- if (argc != 0) {
- fprintf (stderr, "'launch' command takes no parameters\n");
- return -1;
+ else {
+ off_t size;
+ int fd;
+
+ if (parse_size (argv[1], &size) == -1)
+ return -1;
+
+ if (g_launched) {
+ fprintf (stderr, "can't allocate or add disks after launching\n");
+ return -1;
+ }
+
+ fd = open (argv[0], O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK|O_TRUNC, 0666);
+ if (fd == -1) {
+ perror (argv[0]);
+ return -1;
+ }
+
+ if (posix_fallocate (fd, 0, size) == -1) {
+ perror ("fallocate");
+ close (fd);
+ unlink (argv[0]);
+ return -1;
+ }
+
+ if (close (fd) == -1) {
+ perror (argv[0]);
+ unlink (argv[0]);
+ return -1;
+ }
+
+ if (guestfs_add_drive (g, argv[0]) == -1) {
+ unlink (argv[0]);
+ return -1;
+ }
+
+ return 0;
}
- else
- return launch ();
}
else
return run_action (cmd, argc, argv);
void
list_builtin_commands (void)
{
+ /* help and quit should appear at the top */
printf ("%-20s %s\n",
"help", "display a list of commands or help on a command");
printf ("%-20s %s\n",
"quit", "quit guestfish");
+
printf ("%-20s %s\n",
- "add", "add a guest image to be examined or modified");
- printf ("%-20s %s\n",
- "cdrom", "add a CD-ROM image to be examined");
- printf ("%-20s %s\n",
- "launch", "launch the subprocess");
+ "alloc", "allocate an image");
+
+ /* actions are printed after this (see list_commands) */
}
void
display_builtin_command (const char *cmd)
{
- if (strcasecmp (cmd, "add") == 0)
- printf ("add - add a guest image to be examined or modified\n"
- " add <image>\n");
- else if (strcasecmp (cmd, "cdrom") == 0)
- printf ("cdrom - add a CD-ROM image to be examined\n"
- " cdrom <iso-file>\n");
+ /* help for actions is auto-generated, see display_command */
+
+ if (strcasecmp (cmd, "alloc") == 0)
+ printf ("alloc - allocate an image\n"
+ " alloc <filename> <size>\n"
+ "\n"
+ " This creates an empty (zeroed) file of the given size,\n"
+ " and then adds so it can be further examined.\n"
+ "\n"
+ " For more advanced image creation, see qemu-img utility.\n"
+ "\n"
+ " Size can be specified (where <nn> means a number):\n"
+ " <nn> number of kilobytes\n"
+ " eg: 1440 standard 3.5\" floppy\n"
+ " <nn>K or <nn>KB number of kilobytes\n"
+ " <nn>M or <nn>MB number of megabytes\n"
+ " <nn>G or <nn>GB number of gigabytes\n"
+ " <nn>sects number of 512 byte sectors\n");
else if (strcasecmp (cmd, "help") == 0)
printf ("help - display a list of commands or help on a command\n"
" help cmd\n"
else if (strcasecmp (cmd, "quit") == 0)
printf ("quit - quit guestfish\n"
" quit\n");
- else if (strcasecmp (cmd, "launch") == 0)
- printf ("launch - launch the subprocess\n"
- " launch\n");
else
fprintf (stderr, "%s: command not known, use -h to list all commands\n",
cmd);
}
+
+/* Parse size parameter of alloc command. */
+static int
+parse_size (const char *str, off_t *size_rtn)
+{
+ uint64_t size;
+ char type;
+
+ /* Note that the parsing here is looser than what is specified in the
+ * help, but we may tighten it up in future so beware.
+ */
+ if (sscanf (str, "%"SCNu64"%c", &size, &type) == 2) {
+ switch (type) {
+ case 'k': case 'K': size *= 1024; break;
+ case 'm': case 'M': size *= 1024 * 1024; break;
+ case 'g': case 'G': size *= 1024 * 1024 * 1024; break;
+ case 's': size *= 512; break;
+ default:
+ fprintf (stderr, "could not parse size specification '%s'\n", str);
+ return -1;
+ }
+ }
+ else if (sscanf (str, "%"SCNu64, &size) == 1)
+ size *= 1024;
+ else {
+ fprintf (stderr, "could not parse size specification '%s'\n", str);
+ return -1;
+ }
+
+ /* XXX 32 bit file offsets, if anyone uses them? GCC should give
+ * a warning here anyhow.
+ */
+ *size_rtn = size;
+
+ return 0;
+}
+
+void
+free_strings (char **argv)
+{
+ int argc;
+
+ for (argc = 0; argv[argc] != NULL; ++argc)
+ free (argv[argc]);
+ free (argv);
+}
+
+void
+print_strings (char * const * const argv)
+{
+ int argc;
+
+ for (argc = 0; argv[argc] != NULL; ++argc)
+ printf ("%s\n", argv[argc]);
+}
+
+int
+is_true (const char *str)
+{
+ return
+ strcasecmp (str, "0") != 0 &&
+ strcasecmp (str, "f") != 0 &&
+ strcasecmp (str, "false") != 0 &&
+ strcasecmp (str, "n") != 0 &&
+ strcasecmp (str, "no") != 0;
+}
+
+/* This is quite inadequate for real use. For example, there is no way
+ * to specify an empty list. We need to use a real parser to allow
+ * quoting, empty lists, etc.
+ */
+char **
+parse_string_list (const char *str)
+{
+ char **argv;
+ const char *p, *pend;
+ int argc, i;
+
+ argc = 1;
+ for (i = 0; str[i]; ++i)
+ if (str[i] == ':') argc++;
+
+ argv = malloc (sizeof (char *) * (argc+1));
+ if (argv == NULL) { perror ("malloc"); exit (1); }
+
+ p = str;
+ i = 0;
+ while (*p) {
+ pend = strchrnul (p, ':');
+ argv[i] = strndup (p, pend-p);
+ i++;
+ p = *pend == ':' ? pend+1 : pend;
+ }
+ argv[i] = NULL;
+
+ return argv;
+}
git.annexia.org / libguestfs.git / blobdiff