#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <fcntl.h>
#include <getopt.h>
+#include <inttypes.h>
#include <guestfs.h>
static void shell_script (void);
static void script (int prompt);
static void cmdline (char *argv[], int optind, int argc);
-static void issue_command (const char *cmd, char *argv[]);
+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 g_launched = 0;
int quit = 0;
+int verbose = 0;
-void
+int
launch (void)
{
if (!g_launched) {
if (guestfs_launch (g) == -1)
- exit (1);
+ return -1;
if (guestfs_wait_ready (g) == -1)
- exit (1);
+ return -1;
g_launched = 1;
}
+ return 0;
}
static void
"guestfish lets you edit virtual machine filesystems\n"
"Copyright (C) 2009 Red Hat Inc.\n"
"Usage:\n"
- " guestfish [--options] cmd [: cmd ...]\n"
+ " guestfish [--options] cmd [: cmd : cmd ...]\n"
"or for interactive use:\n"
" guestfish\n"
"or from a shell script:\n"
" ...\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;
mps = mp->next;
break;
+ case 'n':
+ guestfs_set_autosync (g, 0);
+ break;
+
+ case 'v':
+ verbose++;
+ guestfs_set_verbose (g, verbose);
+ break;
+
case '?':
usage ();
exit (0);
/* If we've got mountpoints, we must launch the guest and mount them. */
if (mps != NULL) {
- launch ();
+ if (launch () == -1) exit (1);
mount_mps (mps);
}
int len, i;
if (prompt)
- printf ("Welcome to guestfish, the libguestfs filesystem interactive shell for\n"
+ printf ("\n"
+ "Welcome to guestfish, the libguestfs filesystem interactive shell for\n"
"editing virtual machine filesystems.\n"
"\n"
"Type: 'help' for help with commands\n"
exit (1);
}
- issue_command (cmd, argv);
+ if (issue_command (cmd, argv) == -1) {
+ if (!prompt) exit (1);
+ }
}
if (prompt) printf ("\n");
}
while (optind < argc && strcmp (argv[optind], ":") != 0)
optind++;
- if (optind == argc)
- issue_command (cmd, params);
- else {
+ if (optind == argc) {
+ if (issue_command (cmd, params) == -1) exit (1);
+ } else {
argv[optind] = NULL;
- issue_command (cmd, params);
+ if (issue_command (cmd, params) == -1) exit (1);
cmdline (argv, optind+1, argc);
}
}
-static void
+static int
issue_command (const char *cmd, char *argv[])
{
- int i;
+ int argc;
+
+ for (argc = 0; argv[argc] != NULL; ++argc)
+ ;
+
+ if (strcasecmp (cmd, "help") == 0) {
+ if (argc == 0)
+ list_commands ();
+ else
+ display_command (argv[0]);
+ return 0;
+ }
+ else if (strcasecmp (cmd, "quit") == 0 ||
+ strcasecmp (cmd, "exit") == 0 ||
+ strcasecmp (cmd, "q") == 0) {
+ quit = 1;
+ return 0;
+ }
+ else if (strcasecmp (cmd, "add") == 0 ||
+ strcasecmp (cmd, "drive") == 0 ||
+ strcasecmp (cmd, "add-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]);
+ }
+ else if (strcasecmp (cmd, "cdrom") == 0 ||
+ strcasecmp (cmd, "add-cdrom") == 0 ||
+ strcasecmp (cmd, "add_cdrom") == 0) {
+ if (argc != 1) {
+ fprintf (stderr, "use 'cdrom image' to add a CD-ROM image\n");
+ return -1;
+ }
+ else
+ return guestfs_add_cdrom (g, argv[0]);
+ }
+ 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 {
+ 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 if (strcasecmp (cmd, "launch") == 0 ||
+ strcasecmp (cmd, "run") == 0) {
+ if (argc != 0) {
+ fprintf (stderr, "'launch' command takes no parameters\n");
+ return -1;
+ }
+ 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");
+
+ /* then the non-actions, in alphabetical order */
+ printf ("%-20s %s\n",
+ "add", "add a guest image to be examined or modified");
+ printf ("%-20s %s\n",
+ "alloc", "allocate an image");
+ printf ("%-20s %s\n",
+ "cdrom", "add a CD-ROM image to be examined");
+ printf ("%-20s %s\n",
+ "launch", "launch the subprocess");
+
+ /* actions are printed after this (see list_commands) */
+}
- fprintf (stderr, "cmd = %s", cmd);
- for (i = 0; argv[i] != NULL; ++i)
- fprintf (stderr, ", arg[%d]=%s", i, argv[i]);
- fprintf (stderr, "\n");
+void
+display_builtin_command (const char *cmd)
+{
+ /* help for actions is auto-generated, see display_command */
+
+ if (strcasecmp (cmd, "add") == 0)
+ printf ("add - add a guest image to be examined or modified\n"
+ " add <image>\n");
+ else 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, "cdrom") == 0)
+ printf ("cdrom - add a CD-ROM image to be examined\n"
+ " cdrom <iso-file>\n");
+ else if (strcasecmp (cmd, "help") == 0)
+ printf ("help - display a list of commands or help on a command\n"
+ " help cmd\n"
+ " help\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;
+ }
+
+ printf ("size = %lu\n", size);
+ /* 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 **argv)
+{
+ int argc;
+ for (argc = 0; argv[argc] != NULL; ++argc)
+ printf ("%s\n", argv[argc]);
}
git.annexia.org / libguestfs.git / blobdiff