mirror of
https://github.com/libguestfs/libguestfs.git
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0c20bd8ea7
git grep -l 'strncasecmp *([^=]*!= *0'|xargs \ perl -pi -e 's/\bstrncasecmp( *\(.*?\)) *!= *0\b/STRCASENEQLEN$1/g'
1380 lines
35 KiB
C
1380 lines
35 KiB
C
/* guestfish - the filesystem interactive shell
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* Copyright (C) 2009 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <signal.h>
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#include <assert.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#ifdef HAVE_LIBREADLINE
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#include <readline/readline.h>
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#include <readline/history.h>
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#endif
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#include <guestfs.h>
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#include "fish.h"
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#include "c-ctype.h"
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#include "closeout.h"
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#include "progname.h"
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struct mp {
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struct mp *next;
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char *device;
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char *mountpoint;
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};
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struct drv {
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struct drv *next;
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char *filename;
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};
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static void add_drives (struct drv *drv);
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static void mount_mps (struct mp *mp);
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static void interactive (void);
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static void shell_script (void);
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static void script (int prompt);
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static void cmdline (char *argv[], int optind, int argc);
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static void initialize_readline (void);
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static void cleanup_readline (void);
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static void add_history_line (const char *);
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/* Currently open libguestfs handle. */
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guestfs_h *g;
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int read_only = 0;
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int quit = 0;
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int verbose = 0;
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int echo_commands = 0;
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int remote_control_listen = 0;
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int remote_control = 0;
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int exit_on_error = 1;
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int
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launch (guestfs_h *_g)
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{
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assert (_g == g);
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if (guestfs_is_config (g)) {
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if (guestfs_launch (g) == -1)
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return -1;
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}
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return 0;
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}
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static void __attribute__((noreturn))
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usage (int status)
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{
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if (status != EXIT_SUCCESS)
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fprintf (stderr, _("Try `%s --help' for more information.\n"),
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program_name);
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else {
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fprintf (stdout,
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_("%s: guest filesystem shell\n"
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"%s lets you edit virtual machine filesystems\n"
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"Copyright (C) 2009 Red Hat Inc.\n"
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"Usage:\n"
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" %s [--options] cmd [: cmd : cmd ...]\n"
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" %s -i libvirt-domain\n"
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" %s -i disk-image(s)\n"
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"or for interactive use:\n"
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" %s\n"
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"or from a shell script:\n"
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" %s <<EOF\n"
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" cmd\n"
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" ...\n"
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" EOF\n"
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"Options:\n"
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" -h|--cmd-help List available commands\n"
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" -h|--cmd-help cmd Display detailed help on 'cmd'\n"
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" -a|--add image Add image\n"
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" -D|--no-dest-paths Don't tab-complete paths from guest fs\n"
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" -f|--file file Read commands from file\n"
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" -i|--inspector Run virt-inspector to get disk mountpoints\n"
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" --listen Listen for remote commands\n"
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" -m|--mount dev[:mnt] Mount dev on mnt (if omitted, /)\n"
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" -n|--no-sync Don't autosync\n"
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" --remote[=pid] Send commands to remote %s\n"
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" -r|--ro Mount read-only\n"
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" --selinux Enable SELinux support\n"
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" -v|--verbose Verbose messages\n"
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" -x Echo each command before executing it\n"
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" -V|--version Display version and exit\n"
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"For more information, see the manpage %s(1).\n"),
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program_name, program_name, program_name,
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program_name, program_name, program_name,
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program_name, program_name, program_name);
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}
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exit (status);
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}
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int
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main (int argc, char *argv[])
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{
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/* Set global program name that is not polluted with libtool artifacts. */
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set_program_name (argv[0]);
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atexit (close_stdout);
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enum { HELP_OPTION = CHAR_MAX + 1 };
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static const char *options = "a:Df:h::im:nrv?Vx";
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static const struct option long_options[] = {
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{ "add", 1, 0, 'a' },
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{ "cmd-help", 2, 0, 'h' },
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{ "file", 1, 0, 'f' },
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{ "help", 0, 0, HELP_OPTION },
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{ "inspector", 0, 0, 'i' },
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{ "listen", 0, 0, 0 },
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{ "mount", 1, 0, 'm' },
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{ "no-dest-paths", 0, 0, 'D' },
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{ "no-sync", 0, 0, 'n' },
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{ "remote", 2, 0, 0 },
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{ "ro", 0, 0, 'r' },
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{ "selinux", 0, 0, 0 },
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{ "verbose", 0, 0, 'v' },
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{ "version", 0, 0, 'V' },
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{ 0, 0, 0, 0 }
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};
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struct drv *drvs = NULL;
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struct drv *drv;
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struct mp *mps = NULL;
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struct mp *mp;
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char *p, *file = NULL;
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int c;
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int inspector = 0;
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int option_index;
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struct sigaction sa;
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initialize_readline ();
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memset (&sa, 0, sizeof sa);
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sa.sa_handler = SIG_IGN;
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sa.sa_flags = SA_RESTART;
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sigaction (SIGPIPE, &sa, NULL);
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/* guestfs_create is meant to be a lightweight operation, so
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* it's OK to do it early here.
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*/
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g = guestfs_create ();
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if (g == NULL) {
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fprintf (stderr, _("guestfs_create: failed to create handle\n"));
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exit (1);
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}
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guestfs_set_autosync (g, 1);
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/* If developing, add ./appliance to the path. Note that libtools
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* interferes with this because uninstalled guestfish is a shell
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* script that runs the real program with an absolute path. Detect
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* that too.
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*
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* BUT if LIBGUESTFS_PATH environment variable is already set by
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* the user, then don't override it.
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*/
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if (getenv ("LIBGUESTFS_PATH") == NULL &&
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argv[0] &&
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(argv[0][0] != '/' || strstr (argv[0], "/.libs/lt-") != NULL))
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guestfs_set_path (g, "appliance:" GUESTFS_DEFAULT_PATH);
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/* CAUTION: we are careful to modify argv[0] here, only after
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* using it just above.
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*
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* getopt_long uses argv[0], so give it the sanitized name. Save a copy
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* of the original, in case it's needed in virt-inspector mode, below.
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*/
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char *real_argv0 = argv[0];
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argv[0] = bad_cast (program_name);
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for (;;) {
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c = getopt_long (argc, argv, options, long_options, &option_index);
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if (c == -1) break;
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switch (c) {
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case 0: /* options which are long only */
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if (STREQ (long_options[option_index].name, "listen"))
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remote_control_listen = 1;
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else if (STREQ (long_options[option_index].name, "remote")) {
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if (optarg) {
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if (sscanf (optarg, "%d", &remote_control) != 1) {
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fprintf (stderr, _("%s: --listen=PID: PID was not a number: %s\n"),
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program_name, optarg);
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exit (1);
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}
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} else {
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p = getenv ("GUESTFISH_PID");
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if (!p || sscanf (p, "%d", &remote_control) != 1) {
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fprintf (stderr, _("%s: remote: $GUESTFISH_PID must be set"
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" to the PID of the remote process\n"),
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program_name);
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exit (1);
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}
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}
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} else if (STREQ (long_options[option_index].name, "selinux")) {
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guestfs_set_selinux (g, 1);
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} else {
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fprintf (stderr, _("%s: unknown long option: %s (%d)\n"),
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program_name, long_options[option_index].name, option_index);
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exit (1);
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}
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break;
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case 'a':
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if (access (optarg, R_OK) != 0) {
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perror (optarg);
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exit (1);
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}
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drv = malloc (sizeof (struct drv));
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if (!drv) {
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perror ("malloc");
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exit (1);
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}
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drv->filename = optarg;
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drv->next = drvs;
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drvs = drv;
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break;
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case 'D':
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complete_dest_paths = 0;
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break;
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case 'f':
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if (file) {
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fprintf (stderr, _("%s: only one -f parameter can be given\n"),
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program_name);
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exit (1);
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}
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file = optarg;
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break;
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case 'h':
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if (optarg)
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display_command (optarg);
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else if (argv[optind] && argv[optind][0] != '-')
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display_command (argv[optind++]);
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else
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list_commands ();
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exit (0);
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case 'i':
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inspector = 1;
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break;
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case 'm':
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mp = malloc (sizeof (struct mp));
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if (!mp) {
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perror ("malloc");
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exit (1);
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}
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p = strchr (optarg, ':');
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if (p) {
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*p = '\0';
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mp->mountpoint = p+1;
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} else
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mp->mountpoint = bad_cast ("/");
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mp->device = optarg;
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mp->next = mps;
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mps = mp;
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break;
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case 'n':
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guestfs_set_autosync (g, 0);
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break;
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case 'r':
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read_only = 1;
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break;
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case 'v':
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verbose++;
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guestfs_set_verbose (g, verbose);
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break;
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case 'V':
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printf ("%s %s\n", program_name, PACKAGE_VERSION);
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exit (0);
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case 'x':
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echo_commands = 1;
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break;
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case HELP_OPTION:
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usage (0);
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default:
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usage (1);
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}
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}
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/* Inspector mode invalidates most of the other arguments. */
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if (inspector) {
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char cmd[1024];
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int r;
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if (drvs || mps || remote_control_listen || remote_control ||
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guestfs_get_selinux (g)) {
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fprintf (stderr, _("%s: cannot use -i option with -a, -m,"
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" --listen, --remote or --selinux\n"),
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program_name);
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exit (1);
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}
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if (optind >= argc) {
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fprintf (stderr,
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_("%s: -i requires a libvirt domain or path(s) to disk image(s)\n"),
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program_name);
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exit (1);
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}
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strcpy (cmd, "a=`virt-inspector");
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while (optind < argc) {
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if (strlen (cmd) + strlen (argv[optind]) + strlen (real_argv0) + 60
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>= sizeof cmd) {
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fprintf (stderr,
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_("%s: virt-inspector command too long for fixed-size buffer\n"),
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program_name);
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exit (1);
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}
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strcat (cmd, " '");
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strcat (cmd, argv[optind]);
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strcat (cmd, "'");
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optind++;
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}
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if (read_only)
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strcat (cmd, " --ro-fish");
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else
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strcat (cmd, " --fish");
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sprintf (&cmd[strlen(cmd)], "` && %s $a", real_argv0);
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if (guestfs_get_verbose (g))
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strcat (cmd, " -v");
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if (!guestfs_get_autosync (g))
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strcat (cmd, " -n");
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if (verbose)
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fprintf (stderr,
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"%s -i: running virt-inspector command:\n%s\n", program_name, cmd);
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r = system (cmd);
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if (r == -1) {
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perror ("system");
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exit (1);
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}
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exit (WEXITSTATUS (r));
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}
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/* If we've got drives to add, add them now. */
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add_drives (drvs);
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/* If we've got mountpoints, we must launch the guest and mount them. */
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if (mps != NULL) {
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if (launch (g) == -1) exit (1);
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mount_mps (mps);
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}
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/* Remote control? */
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if (remote_control_listen && remote_control) {
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fprintf (stderr,
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_("%s: cannot use --listen and --remote options at the same time\n"),
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program_name);
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exit (1);
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}
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if (remote_control_listen) {
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if (optind < argc) {
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fprintf (stderr,
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_("%s: extra parameters on the command line with --listen flag\n"),
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program_name);
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exit (1);
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}
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if (file) {
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fprintf (stderr,
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_("%s: cannot use --listen and --file options at the same time\n"),
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program_name);
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exit (1);
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}
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rc_listen ();
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}
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/* -f (file) parameter? */
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if (file) {
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close (0);
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if (open (file, O_RDONLY) == -1) {
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perror (file);
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exit (1);
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}
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}
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/* Interactive, shell script, or command(s) on the command line? */
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if (optind >= argc) {
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if (isatty (0))
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interactive ();
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else
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shell_script ();
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}
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else
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cmdline (argv, optind, argc);
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cleanup_readline ();
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exit (0);
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}
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void
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pod2text (const char *name, const char *shortdesc, const char *str)
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{
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FILE *fp;
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fp = popen ("pod2text", "w");
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if (fp == NULL) {
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/* pod2text failed, maybe not found, so let's just print the
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* source instead, since that's better than doing nothing.
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*/
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printf ("%s - %s\n\n%s\n", name, shortdesc, str);
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return;
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}
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fprintf (fp, "=head1 %s - %s\n\n", name, shortdesc);
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fputs (str, fp);
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pclose (fp);
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}
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|
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/* List is built in reverse order, so mount them in reverse order. */
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static void
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mount_mps (struct mp *mp)
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{
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int r;
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|
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if (mp) {
|
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mount_mps (mp->next);
|
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if (!read_only)
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r = guestfs_mount (g, mp->device, mp->mountpoint);
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else
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r = guestfs_mount_ro (g, mp->device, mp->mountpoint);
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if (r == -1)
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exit (1);
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}
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}
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|
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static void
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add_drives (struct drv *drv)
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{
|
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int r;
|
|
|
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if (drv) {
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add_drives (drv->next);
|
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if (!read_only)
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r = guestfs_add_drive (g, drv->filename);
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else
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r = guestfs_add_drive_ro (g, drv->filename);
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if (r == -1)
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exit (1);
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}
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}
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|
|
static void
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interactive (void)
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{
|
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script (1);
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|
}
|
|
|
|
static void
|
|
shell_script (void)
|
|
{
|
|
script (0);
|
|
}
|
|
|
|
#define FISH "><fs> "
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|
|
|
static char *line_read = NULL;
|
|
|
|
static char *
|
|
rl_gets (int prompt)
|
|
{
|
|
#ifdef HAVE_LIBREADLINE
|
|
|
|
if (prompt) {
|
|
if (line_read) {
|
|
free (line_read);
|
|
line_read = NULL;
|
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}
|
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|
|
line_read = readline (prompt ? FISH : "");
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|
|
if (line_read && *line_read)
|
|
add_history_line (line_read);
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|
|
|
return line_read;
|
|
}
|
|
|
|
#endif /* HAVE_LIBREADLINE */
|
|
|
|
static char buf[8192];
|
|
int len;
|
|
|
|
if (prompt) printf (FISH);
|
|
line_read = fgets (buf, sizeof buf, stdin);
|
|
|
|
if (line_read) {
|
|
len = strlen (line_read);
|
|
if (len > 0 && buf[len-1] == '\n') buf[len-1] = '\0';
|
|
}
|
|
|
|
return line_read;
|
|
}
|
|
|
|
static void
|
|
script (int prompt)
|
|
{
|
|
char *buf;
|
|
char *cmd;
|
|
char *p, *pend;
|
|
char *argv[64];
|
|
int len;
|
|
int global_exit_on_error = !prompt;
|
|
int tilde_candidate;
|
|
|
|
if (prompt)
|
|
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"
|
|
" 'quit' to quit the shell\n"
|
|
"\n"));
|
|
|
|
while (!quit) {
|
|
char *pipe = NULL;
|
|
|
|
exit_on_error = global_exit_on_error;
|
|
|
|
buf = rl_gets (prompt);
|
|
if (!buf) {
|
|
quit = 1;
|
|
break;
|
|
}
|
|
|
|
/* Skip any initial whitespace before the command. */
|
|
again:
|
|
while (*buf && c_isspace (*buf))
|
|
buf++;
|
|
|
|
if (!*buf) continue;
|
|
|
|
/* If the next character is '#' then this is a comment. */
|
|
if (*buf == '#') continue;
|
|
|
|
/* If the next character is '!' then pass the whole lot to system(3). */
|
|
if (*buf == '!') {
|
|
int r;
|
|
|
|
r = system (buf+1);
|
|
if (exit_on_error) {
|
|
if (r == -1 ||
|
|
(WIFSIGNALED (r) &&
|
|
(WTERMSIG (r) == SIGINT || WTERMSIG (r) == SIGQUIT)) ||
|
|
WEXITSTATUS (r) != 0)
|
|
exit (1);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* If the next character is '-' allow the command to fail without
|
|
* exiting on error (just for this one command though).
|
|
*/
|
|
if (*buf == '-') {
|
|
exit_on_error = 0;
|
|
buf++;
|
|
goto again;
|
|
}
|
|
|
|
/* Get the command (cannot be quoted). */
|
|
len = strcspn (buf, " \t");
|
|
|
|
if (len == 0) continue;
|
|
|
|
cmd = buf;
|
|
unsigned int i = 0;
|
|
if (buf[len] == '\0') {
|
|
argv[0] = NULL;
|
|
goto got_command;
|
|
}
|
|
|
|
buf[len] = '\0';
|
|
p = &buf[len+1];
|
|
p += strspn (p, " \t");
|
|
|
|
/* Get the parameters. */
|
|
while (*p && i < sizeof argv / sizeof argv[0]) {
|
|
tilde_candidate = 0;
|
|
|
|
/* Parameters which start with quotes or pipes are treated
|
|
* specially. Bare parameters are delimited by whitespace.
|
|
*/
|
|
if (*p == '"') {
|
|
p++;
|
|
len = strcspn (p, "\"");
|
|
if (p[len] == '\0') {
|
|
fprintf (stderr, _("%s: unterminated double quote\n"), program_name);
|
|
if (exit_on_error) exit (1);
|
|
goto next_command;
|
|
}
|
|
if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
|
|
fprintf (stderr,
|
|
_("%s: command arguments not separated by whitespace\n"),
|
|
program_name);
|
|
if (exit_on_error) exit (1);
|
|
goto next_command;
|
|
}
|
|
p[len] = '\0';
|
|
pend = p[len+1] ? &p[len+2] : &p[len+1];
|
|
} else if (*p == '\'') {
|
|
p++;
|
|
len = strcspn (p, "'");
|
|
if (p[len] == '\0') {
|
|
fprintf (stderr, _("%s: unterminated single quote\n"), program_name);
|
|
if (exit_on_error) exit (1);
|
|
goto next_command;
|
|
}
|
|
if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
|
|
fprintf (stderr,
|
|
_("%s: command arguments not separated by whitespace\n"),
|
|
program_name);
|
|
if (exit_on_error) exit (1);
|
|
goto next_command;
|
|
}
|
|
p[len] = '\0';
|
|
pend = p[len+1] ? &p[len+2] : &p[len+1];
|
|
} else if (*p == '|') {
|
|
*p = '\0';
|
|
pipe = p+1;
|
|
continue;
|
|
/*
|
|
} else if (*p == '[') {
|
|
int c = 1;
|
|
p++;
|
|
pend = p;
|
|
while (*pend && c != 0) {
|
|
if (*pend == '[') c++;
|
|
else if (*pend == ']') c--;
|
|
pend++;
|
|
}
|
|
if (c != 0) {
|
|
fprintf (stderr,
|
|
_("%s: unterminated \"[...]\" sequence\n"), program_name);
|
|
if (exit_on_error) exit (1);
|
|
goto next_command;
|
|
}
|
|
if (*pend && (*pend != ' ' && *pend != '\t')) {
|
|
fprintf (stderr,
|
|
_("%s: command arguments not separated by whitespace\n"),
|
|
program_name);
|
|
if (exit_on_error) exit (1);
|
|
goto next_command;
|
|
}
|
|
*(pend-1) = '\0';
|
|
*/
|
|
} else if (*p != ' ' && *p != '\t') {
|
|
/* If the first character is a ~ then note that this parameter
|
|
* is a candidate for ~username expansion. NB this does not
|
|
* apply to quoted parameters.
|
|
*/
|
|
tilde_candidate = *p == '~';
|
|
len = strcspn (p, " \t");
|
|
if (p[len]) {
|
|
p[len] = '\0';
|
|
pend = &p[len+1];
|
|
} else
|
|
pend = &p[len];
|
|
} else {
|
|
fprintf (stderr, _("%s: internal error parsing string at '%s'\n"),
|
|
program_name, p);
|
|
abort ();
|
|
}
|
|
|
|
if (!tilde_candidate)
|
|
argv[i] = p;
|
|
else
|
|
argv[i] = try_tilde_expansion (p);
|
|
i++;
|
|
p = pend;
|
|
|
|
if (*p)
|
|
p += strspn (p, " \t");
|
|
}
|
|
|
|
if (i == sizeof argv / sizeof argv[0]) {
|
|
fprintf (stderr, _("%s: too many arguments\n"), program_name);
|
|
if (exit_on_error) exit (1);
|
|
goto next_command;
|
|
}
|
|
|
|
argv[i] = NULL;
|
|
|
|
got_command:
|
|
if (issue_command (cmd, argv, pipe) == -1) {
|
|
if (exit_on_error) exit (1);
|
|
}
|
|
|
|
next_command:;
|
|
}
|
|
if (prompt) printf ("\n");
|
|
}
|
|
|
|
static void
|
|
cmdline (char *argv[], int optind, int argc)
|
|
{
|
|
const char *cmd;
|
|
char **params;
|
|
|
|
exit_on_error = 1;
|
|
|
|
if (optind >= argc) return;
|
|
|
|
cmd = argv[optind++];
|
|
if (STREQ (cmd, ":")) {
|
|
fprintf (stderr, _("%s: empty command on command line\n"), program_name);
|
|
exit (1);
|
|
}
|
|
params = &argv[optind];
|
|
|
|
/* Search for end of command list or ":" ... */
|
|
while (optind < argc && STRNEQ (argv[optind], ":"))
|
|
optind++;
|
|
|
|
if (optind == argc) {
|
|
if (issue_command (cmd, params, NULL) == -1) exit (1);
|
|
} else {
|
|
argv[optind] = NULL;
|
|
if (issue_command (cmd, params, NULL) == -1) exit (1);
|
|
cmdline (argv, optind+1, argc);
|
|
}
|
|
}
|
|
|
|
int
|
|
issue_command (const char *cmd, char *argv[], const char *pipecmd)
|
|
{
|
|
int argc;
|
|
int stdout_saved_fd = -1;
|
|
int pid = 0;
|
|
int i, r;
|
|
|
|
if (echo_commands) {
|
|
printf ("%s", cmd);
|
|
for (i = 0; argv[i] != NULL; ++i)
|
|
printf (" %s", argv[i]);
|
|
printf ("\n");
|
|
}
|
|
|
|
/* For | ... commands. Annoyingly we can't use popen(3) here. */
|
|
if (pipecmd) {
|
|
int fd[2];
|
|
|
|
if (fflush (stdout) == EOF) {
|
|
perror ("failed to flush standard output");
|
|
return -1;
|
|
}
|
|
if (pipe (fd) < 0) {
|
|
perror ("pipe failed");
|
|
return -1;
|
|
}
|
|
pid = fork ();
|
|
if (pid == -1) {
|
|
perror ("fork");
|
|
return -1;
|
|
}
|
|
|
|
if (pid == 0) { /* Child process. */
|
|
close (fd[1]);
|
|
if (dup2 (fd[0], 0) < 0) {
|
|
perror ("dup2 of stdin failed");
|
|
_exit (1);
|
|
}
|
|
|
|
r = system (pipecmd);
|
|
if (r == -1) {
|
|
perror (pipecmd);
|
|
_exit (1);
|
|
}
|
|
_exit (WEXITSTATUS (r));
|
|
}
|
|
|
|
if ((stdout_saved_fd = dup (1)) < 0) {
|
|
perror ("failed to dup stdout");
|
|
return -1;
|
|
}
|
|
close (fd[0]);
|
|
if (dup2 (fd[1], 1) < 0) {
|
|
perror ("failed to dup stdout");
|
|
close (stdout_saved_fd);
|
|
return -1;
|
|
}
|
|
close (fd[1]);
|
|
}
|
|
|
|
for (argc = 0; argv[argc] != NULL; ++argc)
|
|
;
|
|
|
|
/* If --remote was set, then send this command to a remote process. */
|
|
if (remote_control)
|
|
r = rc_remote (remote_control, cmd, argc, argv, exit_on_error);
|
|
|
|
/* Otherwise execute it locally. */
|
|
else if (STRCASEEQ (cmd, "help")) {
|
|
if (argc == 0)
|
|
list_commands ();
|
|
else
|
|
display_command (argv[0]);
|
|
r = 0;
|
|
}
|
|
else if (STRCASEEQ (cmd, "quit") ||
|
|
STRCASEEQ (cmd, "exit") ||
|
|
STRCASEEQ (cmd, "q")) {
|
|
quit = 1;
|
|
r = 0;
|
|
}
|
|
else if (STRCASEEQ (cmd, "alloc") ||
|
|
STRCASEEQ (cmd, "allocate"))
|
|
r = do_alloc (cmd, argc, argv);
|
|
else if (STRCASEEQ (cmd, "echo"))
|
|
r = do_echo (cmd, argc, argv);
|
|
else if (STRCASEEQ (cmd, "edit") ||
|
|
STRCASEEQ (cmd, "vi") ||
|
|
STRCASEEQ (cmd, "emacs"))
|
|
r = do_edit (cmd, argc, argv);
|
|
else if (STRCASEEQ (cmd, "lcd"))
|
|
r = do_lcd (cmd, argc, argv);
|
|
else if (STRCASEEQ (cmd, "glob"))
|
|
r = do_glob (cmd, argc, argv);
|
|
else if (STRCASEEQ (cmd, "more") ||
|
|
STRCASEEQ (cmd, "less"))
|
|
r = do_more (cmd, argc, argv);
|
|
else if (STRCASEEQ (cmd, "reopen"))
|
|
r = do_reopen (cmd, argc, argv);
|
|
else if (STRCASEEQ (cmd, "sparse"))
|
|
r = do_sparse (cmd, argc, argv);
|
|
else if (STRCASEEQ (cmd, "time"))
|
|
r = do_time (cmd, argc, argv);
|
|
else
|
|
r = run_action (cmd, argc, argv);
|
|
|
|
/* Always flush stdout after every command, so that messages, results
|
|
* etc appear immediately.
|
|
*/
|
|
if (fflush (stdout) == EOF) {
|
|
perror ("failed to flush standard output");
|
|
return -1;
|
|
}
|
|
|
|
if (pipecmd) {
|
|
close (1);
|
|
if (dup2 (stdout_saved_fd, 1) < 0) {
|
|
perror ("failed to dup2 standard output");
|
|
r = -1;
|
|
}
|
|
close (stdout_saved_fd);
|
|
if (waitpid (pid, NULL, 0) < 0) {
|
|
perror ("waiting for command to complete");
|
|
r = -1;
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
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",
|
|
"alloc", _("allocate an image"));
|
|
printf ("%-20s %s\n",
|
|
"echo", _("display a line of text"));
|
|
printf ("%-20s %s\n",
|
|
"edit", _("edit a file in the image"));
|
|
printf ("%-20s %s\n",
|
|
"lcd", _("local change directory"));
|
|
printf ("%-20s %s\n",
|
|
"glob", _("expand wildcards in command"));
|
|
printf ("%-20s %s\n",
|
|
"more", _("view a file in the pager"));
|
|
printf ("%-20s %s\n",
|
|
"reopen", _("close and reopen libguestfs handle"));
|
|
printf ("%-20s %s\n",
|
|
"sparse", _("allocate a sparse image file"));
|
|
printf ("%-20s %s\n",
|
|
"time", _("measure time taken to run command"));
|
|
|
|
/* actions are printed after this (see list_commands) */
|
|
}
|
|
|
|
void
|
|
display_builtin_command (const char *cmd)
|
|
{
|
|
/* help for actions is auto-generated, see display_command */
|
|
|
|
if (STRCASEEQ (cmd, "alloc") ||
|
|
STRCASEEQ (cmd, "allocate"))
|
|
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>T or <nn>TB number of terabytes\n"
|
|
" <nn>P or <nn>PB number of petabytes\n"
|
|
" <nn>E or <nn>EB number of exabytes\n"
|
|
" <nn>sects number of 512 byte sectors\n"));
|
|
else if (STRCASEEQ (cmd, "echo"))
|
|
printf (_("echo - display a line of text\n"
|
|
" echo [<params> ...]\n"
|
|
"\n"
|
|
" This echos the parameters to the terminal.\n"));
|
|
else if (STRCASEEQ (cmd, "edit") ||
|
|
STRCASEEQ (cmd, "vi") ||
|
|
STRCASEEQ (cmd, "emacs"))
|
|
printf (_("edit - edit a file in the image\n"
|
|
" edit <filename>\n"
|
|
"\n"
|
|
" This is used to edit a file.\n"
|
|
"\n"
|
|
" It is the equivalent of (and is implemented by)\n"
|
|
" running \"cat\", editing locally, and then \"write-file\".\n"
|
|
"\n"
|
|
" Normally it uses $EDITOR, but if you use the aliases\n"
|
|
" \"vi\" or \"emacs\" you will get those editors.\n"
|
|
"\n"
|
|
" NOTE: This will not work reliably for large files\n"
|
|
" (> 2 MB) or binary files containing \\0 bytes.\n"));
|
|
else if (STRCASEEQ (cmd, "lcd"))
|
|
printf (_("lcd - local change directory\n"
|
|
" lcd <directory>\n"
|
|
"\n"
|
|
" Change guestfish's current directory. This command is\n"
|
|
" useful if you want to download files to a particular\n"
|
|
" place.\n"));
|
|
else if (STRCASEEQ (cmd, "glob"))
|
|
printf (_("glob - expand wildcards in command\n"
|
|
" glob <command> [<args> ...]\n"
|
|
"\n"
|
|
" Glob runs <command> with wildcards expanded in any\n"
|
|
" command args. Note that the command is run repeatedly\n"
|
|
" once for each expanded argument.\n"));
|
|
else if (STRCASEEQ (cmd, "help"))
|
|
printf (_("help - display a list of commands or help on a command\n"
|
|
" help cmd\n"
|
|
" help\n"));
|
|
else if (STRCASEEQ (cmd, "more") ||
|
|
STRCASEEQ (cmd, "less"))
|
|
printf (_("more - view a file in the pager\n"
|
|
" more <filename>\n"
|
|
"\n"
|
|
" This is used to view a file in the pager.\n"
|
|
"\n"
|
|
" It is the equivalent of (and is implemented by)\n"
|
|
" running \"cat\" and using the pager.\n"
|
|
"\n"
|
|
" Normally it uses $PAGER, but if you use the alias\n"
|
|
" \"less\" then it always uses \"less\".\n"
|
|
"\n"
|
|
" NOTE: This will not work reliably for large files\n"
|
|
" (> 2 MB) or binary files containing \\0 bytes.\n"));
|
|
else if (STRCASEEQ (cmd, "quit") ||
|
|
STRCASEEQ (cmd, "exit") ||
|
|
STRCASEEQ (cmd, "q"))
|
|
printf (_("quit - quit guestfish\n"
|
|
" quit\n"));
|
|
else if (STRCASEEQ (cmd, "reopen"))
|
|
printf (_("reopen - close and reopen the libguestfs handle\n"
|
|
" reopen\n"
|
|
"\n"
|
|
"Close and reopen the libguestfs handle. It is not necessary to use\n"
|
|
"this normally, because the handle is closed properly when guestfish\n"
|
|
"exits. However this is occasionally useful for testing.\n"));
|
|
else if (STRCASEEQ (cmd, "sparse"))
|
|
printf (_("sparse - allocate a sparse image file\n"
|
|
" sparse <filename> <size>\n"
|
|
"\n"
|
|
" This creates an empty sparse file of the given size,\n"
|
|
" and then adds so it can be further examined.\n"
|
|
"\n"
|
|
" In all respects it works the same as the 'alloc'\n"
|
|
" command, except that the image file is allocated\n"
|
|
" sparsely, which means that disk blocks are not assigned\n"
|
|
" to the file until they are needed. Sparse disk files\n"
|
|
" only use space when written to, but they are slower\n"
|
|
" and there is a danger you could run out of real disk\n"
|
|
" space during a write operation.\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>T or <nn>TB number of terabytes\n"
|
|
" <nn>P or <nn>PB number of petabytes\n"
|
|
" <nn>E or <nn>EB number of exabytes\n"
|
|
" <nn>sects number of 512 byte sectors\n"));
|
|
else if (STRCASEEQ (cmd, "time"))
|
|
printf (_("time - measure time taken to run command\n"
|
|
" time <command> [<args> ...]\n"
|
|
"\n"
|
|
" This runs <command> as usual, and prints the elapsed\n"
|
|
" time afterwards.\n"));
|
|
else
|
|
fprintf (stderr, _("%s: command not known, use -h to list all commands\n"),
|
|
cmd);
|
|
}
|
|
|
|
void
|
|
free_strings (char **argv)
|
|
{
|
|
int argc;
|
|
|
|
for (argc = 0; argv[argc] != NULL; ++argc)
|
|
free (argv[argc]);
|
|
free (argv);
|
|
}
|
|
|
|
int
|
|
count_strings (char *const *argv)
|
|
{
|
|
int c;
|
|
|
|
for (c = 0; argv[c]; ++c)
|
|
;
|
|
return c;
|
|
}
|
|
|
|
void
|
|
print_strings (char *const *argv)
|
|
{
|
|
int argc;
|
|
|
|
for (argc = 0; argv[argc] != NULL; ++argc)
|
|
printf ("%s\n", argv[argc]);
|
|
}
|
|
|
|
void
|
|
print_table (char *const *argv)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; argv[i] != NULL; i += 2)
|
|
printf ("%s: %s\n", argv[i], argv[i+1]);
|
|
}
|
|
|
|
int
|
|
is_true (const char *str)
|
|
{
|
|
return
|
|
STRCASENEQ (str, "0") &&
|
|
STRCASENEQ (str, "f") &&
|
|
STRCASENEQ (str, "false") &&
|
|
STRCASENEQ (str, "n") &&
|
|
STRCASENEQ (str, "no");
|
|
}
|
|
|
|
/* Free strings from a non-NULL terminated char** */
|
|
static void
|
|
free_n_strings (char **str, size_t len)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
free (str[i]);
|
|
}
|
|
free (str);
|
|
}
|
|
|
|
char **
|
|
parse_string_list (const char *str)
|
|
{
|
|
char **argv = NULL;
|
|
size_t argv_len = 0;
|
|
|
|
/* Current position pointer */
|
|
const char *p = str;
|
|
|
|
/* Token might be simple:
|
|
* Token
|
|
* or be quoted:
|
|
* 'This is a single token'
|
|
* or contain embedded single-quoted sections:
|
|
* This' is a sing'l'e to'ken
|
|
*
|
|
* The latter may seem over-complicated, but it's what a normal shell does.
|
|
* Not doing it risks surprising somebody.
|
|
*
|
|
* This outer loop is over complete tokens.
|
|
*/
|
|
while (*p) {
|
|
char *tok = NULL;
|
|
size_t tok_len = 0;
|
|
|
|
/* Skip leading whitespace */
|
|
p += strspn (p, " \t");
|
|
|
|
char in_quote = 0;
|
|
|
|
/* This loop is over token 'fragments'. A token can be in multiple bits if
|
|
* it contains single quotes. We also treat both sides of an escaped quote
|
|
* as separate fragments because we can't just copy it: we have to remove
|
|
* the \.
|
|
*/
|
|
while (*p && (!c_isblank (*p) || in_quote)) {
|
|
const char *end = p;
|
|
|
|
/* Check if the fragment starts with a quote */
|
|
if ('\'' == *p) {
|
|
/* Toggle in_quote */
|
|
in_quote = !in_quote;
|
|
|
|
/* Skip the quote */
|
|
p++; end++;
|
|
}
|
|
|
|
/* If we're in a quote, look for an end quote */
|
|
if (in_quote) {
|
|
end += strcspn (end, "'");
|
|
}
|
|
|
|
/* Otherwise, look for whitespace or a quote */
|
|
else {
|
|
end += strcspn (end, " \t'");
|
|
}
|
|
|
|
/* Grow the token to accommodate the fragment */
|
|
size_t tok_end = tok_len;
|
|
tok_len += end - p;
|
|
char *tok_new = realloc (tok, tok_len + 1);
|
|
if (NULL == tok_new) {
|
|
perror ("realloc");
|
|
free_n_strings (argv, argv_len);
|
|
free (tok);
|
|
exit (1);
|
|
}
|
|
tok = tok_new;
|
|
|
|
/* Check if we stopped on an escaped quote */
|
|
if ('\'' == *end && end != p && *(end-1) == '\\') {
|
|
/* Add everything before \' to the token */
|
|
memcpy (&tok[tok_end], p, end - p - 1);
|
|
|
|
/* Add the quote */
|
|
tok[tok_len-1] = '\'';
|
|
|
|
/* Already processed the quote */
|
|
p = end + 1;
|
|
}
|
|
|
|
else {
|
|
/* Add the whole fragment */
|
|
memcpy (&tok[tok_end], p, end - p);
|
|
|
|
p = end;
|
|
}
|
|
}
|
|
|
|
/* We've reached the end of a token. We shouldn't still be in quotes. */
|
|
if (in_quote) {
|
|
fprintf (stderr, _("Runaway quote in string \"%s\"\n"), str);
|
|
|
|
free_n_strings (argv, argv_len);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Add this token if there is one. There might not be if there was
|
|
* whitespace at the end of the input string */
|
|
if (tok) {
|
|
/* Add the NULL terminator */
|
|
tok[tok_len] = '\0';
|
|
|
|
/* Add the argument to the argument list */
|
|
argv_len++;
|
|
char **argv_new = realloc (argv, sizeof (*argv) * argv_len);
|
|
if (NULL == argv_new) {
|
|
perror ("realloc");
|
|
free_n_strings (argv, argv_len-1);
|
|
free (tok);
|
|
exit (1);
|
|
}
|
|
argv = argv_new;
|
|
|
|
argv[argv_len-1] = tok;
|
|
}
|
|
}
|
|
|
|
/* NULL terminate the argument list */
|
|
argv_len++;
|
|
char **argv_new = realloc (argv, sizeof (*argv) * argv_len);
|
|
if (NULL == argv_new) {
|
|
perror ("realloc");
|
|
free_n_strings (argv, argv_len-1);
|
|
exit (1);
|
|
}
|
|
argv = argv_new;
|
|
|
|
argv[argv_len-1] = NULL;
|
|
|
|
return argv;
|
|
}
|
|
|
|
#ifdef HAVE_LIBREADLINE
|
|
static char histfile[1024];
|
|
static int nr_history_lines = 0;
|
|
#endif
|
|
|
|
static void
|
|
initialize_readline (void)
|
|
{
|
|
#ifdef HAVE_LIBREADLINE
|
|
const char *home;
|
|
|
|
home = getenv ("HOME");
|
|
if (home) {
|
|
snprintf (histfile, sizeof histfile, "%s/.guestfish", home);
|
|
using_history ();
|
|
(void) read_history (histfile);
|
|
}
|
|
|
|
rl_readline_name = "guestfish";
|
|
rl_attempted_completion_function = do_completion;
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
cleanup_readline (void)
|
|
{
|
|
#ifdef HAVE_LIBREADLINE
|
|
int fd;
|
|
|
|
if (histfile[0] != '\0') {
|
|
fd = open (histfile, O_WRONLY|O_CREAT, 0644);
|
|
if (fd == -1) {
|
|
perror (histfile);
|
|
return;
|
|
}
|
|
close (fd);
|
|
|
|
(void) append_history (nr_history_lines, histfile);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
add_history_line (const char *line)
|
|
{
|
|
#ifdef HAVE_LIBREADLINE
|
|
add_history (line);
|
|
nr_history_lines++;
|
|
#endif
|
|
}
|
|
|
|
int
|
|
xwrite (int fd, const void *v_buf, size_t len)
|
|
{
|
|
int r;
|
|
const char *buf = v_buf;
|
|
|
|
while (len > 0) {
|
|
r = write (fd, buf, len);
|
|
if (r == -1) {
|
|
perror ("write");
|
|
return -1;
|
|
}
|
|
buf += r;
|
|
len -= r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Resolve the special "win:..." form for Windows-specific paths.
|
|
* This always returns a newly allocated string which is freed by the
|
|
* caller function in "cmds.c".
|
|
*/
|
|
char *
|
|
resolve_win_path (const char *path)
|
|
{
|
|
char *ret;
|
|
size_t i;
|
|
|
|
if (STRCASENEQLEN (path, "win:", 4)) {
|
|
ret = strdup (path);
|
|
if (ret == NULL)
|
|
perror ("strdup");
|
|
return ret;
|
|
}
|
|
|
|
path += 4;
|
|
|
|
/* Drop drive letter, if it's "C:". */
|
|
if (strncasecmp (path, "c:", 2) == 0)
|
|
path += 2;
|
|
|
|
if (!*path) {
|
|
ret = strdup ("/");
|
|
if (ret == NULL)
|
|
perror ("strdup");
|
|
return ret;
|
|
}
|
|
|
|
ret = strdup (path);
|
|
if (ret == NULL) {
|
|
perror ("strdup");
|
|
return NULL;
|
|
}
|
|
|
|
/* Blindly convert any backslashes into forward slashes. Is this good? */
|
|
for (i = 0; i < strlen (ret); ++i)
|
|
if (ret[i] == '\\')
|
|
ret[i] = '/';
|
|
|
|
char *t = guestfs_case_sensitive_path (g, ret);
|
|
free (ret);
|
|
ret = t;
|
|
|
|
return ret;
|
|
}
|