-/* guestfish - the filesystem shell
+/* guestfish - the filesystem interactive shell
* Copyright (C) 2009 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
#include "fish.h"
+struct mp {
+ struct mp *next;
+ char *device;
+ char *mountpoint;
+};
+
+static void mount_mps (struct mp *mp);
+static void interactive (void);
+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[]);
+
+/* Currently open libguestfs handle. */
+guestfs_h *g;
+int g_launched = 0;
+
+int quit = 0;
+
+void
+launch (void)
+{
+ if (!g_launched) {
+ if (guestfs_launch (g) == -1)
+ exit (1);
+ if (guestfs_wait_ready (g) == -1)
+ exit (1);
+ g_launched = 1;
+ }
+}
+
static void
usage (void)
{
"guestfish lets you edit virtual machine filesystems\n"
"Copyright (C) 2009 Red Hat Inc.\n"
"Usage:\n"
- " guestfish [--options] [cmd]\n"
+ " guestfish [--options] cmd [: cmd ...]\n"
"or for interactive use:\n"
" guestfish\n"
"or from a shell script:\n"
"Options:\n"
" -h|--cmd-help List available commands\n"
" -h|--cmd-help cmd Display detailed help on 'cmd'\n"
- "For more information, see the manual page guestfish(1).\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");
}
int
main (int argc, char *argv[])
{
- static const char *options = "h::?";
+ static const char *options = "a:h::m:v?";
static struct option long_options[] = {
+ { "add", 1, 0, 'a' },
{ "cmd-help", 2, 0, 'h' },
{ "help", 0, 0, '?' },
+ { "mount", 1, 0, 'm' },
+ { "verbose", 0, 0, 'v' },
{ 0, 0, 0, 0 }
};
+ struct mp *mps = NULL;
+ struct mp *mp;
+ char *p;
int c;
+ /* guestfs_create is meant to be a lightweight operation, so
+ * it's OK to do it early here.
+ */
+ g = guestfs_create ();
+ if (g == NULL) {
+ fprintf (stderr, "guestfs_create: failed to create handle\n");
+ exit (1);
+ }
+
for (;;) {
c = getopt_long (argc, argv, options, long_options, NULL);
if (c == -1) break;
switch (c) {
+ case 'a':
+ if (access (optarg, R_OK) != 0) {
+ perror (optarg);
+ exit (1);
+ }
+ if (guestfs_add_drive (g, optarg) == -1)
+ exit (1);
+ break;
+
case 'h':
if (optarg)
display_command (optarg);
list_commands ();
exit (0);
+ case 'm':
+ mp = malloc (sizeof (struct mp));
+ if (!mp) {
+ perror ("malloc");
+ exit (1);
+ }
+ p = strchr (optarg, ':');
+ if (p) {
+ *p = '\0';
+ mp->mountpoint = p+1;
+ } else
+ mp->mountpoint = "/";
+ mp->device = optarg;
+ mp->next = mps;
+ mps = mp->next;
+ break;
+
case '?':
usage ();
exit (0);
}
}
- if (optind < argc) {
- usage ();
- exit (1);
+ /* If we've got mountpoints, we must launch the guest and mount them. */
+ if (mps != NULL) {
+ launch ();
+ mount_mps (mps);
}
-
-
-
-
-
-
-
-
-
-
+ /* Interactive, shell script, or command(s) on the command line? */
+ if (optind >= argc) {
+ if (isatty (0))
+ interactive ();
+ else
+ shell_script ();
+ }
+ else
+ cmdline (argv, optind, argc);
exit (0);
}
fputs (str, fp);
pclose (fp);
}
+
+/* List is built in reverse order, so mount them in reverse order. */
+static void
+mount_mps (struct mp *mp)
+{
+ if (mp) {
+ mount_mps (mp->next);
+ if (guestfs_mount (g, mp->device, mp->mountpoint) == -1)
+ exit (1);
+ }
+}
+
+static void
+interactive (void)
+{
+ script (1);
+}
+
+static void
+shell_script (void)
+{
+ script (0);
+}
+
+static void
+script (int prompt)
+{
+ char buf[8192];
+ char *cmd;
+ char *argv[64];
+ int len, i;
+
+ if (prompt)
+ printf ("Welcome to guestfish, the libguestfs filesystem interactive shell for\n"
+ "editing virtual machine filesystems.\n"
+ "\n"
+ "Type: 'help' for help with commands\n"
+ " 'quit' to quit the shell\n"
+ "\n");
+
+ while (!quit) {
+ if (prompt) printf ("><fs> ");
+ if (fgets (buf, sizeof buf, stdin) == NULL) {
+ quit = 1;
+ break;
+ }
+
+ len = strlen (buf);
+ if (len > 0 && buf[len-1] == '\n') buf[len-1] = '\0';
+
+ /* Split the buffer up at whitespace. */
+ cmd = strtok (buf, " \t");
+ if (cmd == NULL)
+ continue;
+
+ i = 0;
+ while (i < sizeof argv / sizeof argv[0] &&
+ (argv[i] = strtok (NULL, " \t")) != NULL)
+ i++;
+ if (i == sizeof argv / sizeof argv[0]) {
+ fprintf (stderr, "guestfish: too many arguments in command\n");
+ exit (1);
+ }
+
+ issue_command (cmd, argv);
+ }
+ if (prompt) printf ("\n");
+}
+
+static void
+cmdline (char *argv[], int optind, int argc)
+{
+ const char *cmd;
+ char **params;
+
+ if (optind >= argc) return;
+
+ cmd = argv[optind++];
+ if (strcmp (cmd, ":") == 0) {
+ fprintf (stderr, "guestfish: empty command on command line\n");
+ exit (1);
+ }
+ params = &argv[optind];
+
+ /* Search for end of command list or ":" ... */
+ while (optind < argc && strcmp (argv[optind], ":") != 0)
+ optind++;
+
+ if (optind == argc)
+ issue_command (cmd, params);
+ else {
+ argv[optind] = NULL;
+ issue_command (cmd, params);
+ cmdline (argv, optind+1, argc);
+ }
+}
+
+static void
+issue_command (const char *cmd, char *argv[])
+{
+ int i;
+
+ fprintf (stderr, "cmd = %s", cmd);
+ for (i = 0; argv[i] != NULL; ++i)
+ fprintf (stderr, ", arg[%d]=%s", i, argv[i]);
+ fprintf (stderr, "\n");
+
+
+
+
+
+}
git.annexia.org / libguestfs.git / blobdiff