1 /* guestfish - the filesystem interactive shell
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <sys/types.h>
33 #ifdef HAVE_LIBREADLINE
34 #include <readline/readline.h>
35 #include <readline/history.h>
56 static void add_drives (struct drv *drv);
57 static void mount_mps (struct mp *mp);
58 static void interactive (void);
59 static void shell_script (void);
60 static void script (int prompt);
61 static void cmdline (char *argv[], int optind, int argc);
62 static void initialize_readline (void);
63 static void cleanup_readline (void);
64 #ifdef HAVE_LIBREADLINE
65 static void add_history_line (const char *);
68 /* Currently open libguestfs handle. */
74 int remote_control_listen = 0;
75 int remote_control = 0;
76 int exit_on_error = 1;
80 launch (guestfs_h *_g)
84 if (guestfs_is_config (g)) {
85 if (guestfs_launch (g) == -1)
91 static void __attribute__((noreturn))
94 if (status != EXIT_SUCCESS)
95 fprintf (stderr, _("Try `%s --help' for more information.\n"),
99 _("%s: guest filesystem shell\n"
100 "%s lets you edit virtual machine filesystems\n"
101 "Copyright (C) 2009 Red Hat Inc.\n"
103 " %s [--options] cmd [: cmd : cmd ...]\n"
104 " %s -i libvirt-domain\n"
105 " %s -i disk-image(s)\n"
106 "or for interactive use:\n"
108 "or from a shell script:\n"
114 " -h|--cmd-help List available commands\n"
115 " -h|--cmd-help cmd Display detailed help on 'cmd'\n"
116 " -a|--add image Add image\n"
117 " -D|--no-dest-paths Don't tab-complete paths from guest fs\n"
118 " -f|--file file Read commands from file\n"
119 " -i|--inspector Run virt-inspector to get disk mountpoints\n"
120 " --listen Listen for remote commands\n"
121 " -m|--mount dev[:mnt] Mount dev on mnt (if omitted, /)\n"
122 " -n|--no-sync Don't autosync\n"
123 " --remote[=pid] Send commands to remote %s\n"
124 " -r|--ro Mount read-only\n"
125 " --selinux Enable SELinux support\n"
126 " -v|--verbose Verbose messages\n"
127 " -x Echo each command before executing it\n"
128 " -V|--version Display version and exit\n"
129 "For more information, see the manpage %s(1).\n"),
130 program_name, program_name, program_name,
131 program_name, program_name, program_name,
132 program_name, program_name, program_name);
138 main (int argc, char *argv[])
140 /* Set global program name that is not polluted with libtool artifacts. */
141 set_program_name (argv[0]);
143 atexit (close_stdout);
145 setlocale (LC_ALL, "");
146 bindtextdomain (PACKAGE, LOCALEBASEDIR);
147 textdomain (PACKAGE);
149 enum { HELP_OPTION = CHAR_MAX + 1 };
151 static const char *options = "a:Df:h::im:nrv?Vx";
152 static const struct option long_options[] = {
153 { "add", 1, 0, 'a' },
154 { "cmd-help", 2, 0, 'h' },
155 { "file", 1, 0, 'f' },
156 { "help", 0, 0, HELP_OPTION },
157 { "inspector", 0, 0, 'i' },
158 { "listen", 0, 0, 0 },
159 { "mount", 1, 0, 'm' },
160 { "no-dest-paths", 0, 0, 'D' },
161 { "no-sync", 0, 0, 'n' },
162 { "remote", 2, 0, 0 },
164 { "selinux", 0, 0, 0 },
165 { "verbose", 0, 0, 'v' },
166 { "version", 0, 0, 'V' },
169 struct drv *drvs = NULL;
171 struct mp *mps = NULL;
173 char *p, *file = NULL;
179 initialize_readline ();
181 memset (&sa, 0, sizeof sa);
182 sa.sa_handler = SIG_IGN;
183 sa.sa_flags = SA_RESTART;
184 sigaction (SIGPIPE, &sa, NULL);
186 /* guestfs_create is meant to be a lightweight operation, so
187 * it's OK to do it early here.
189 g = guestfs_create ();
191 fprintf (stderr, _("guestfs_create: failed to create handle\n"));
195 guestfs_set_autosync (g, 1);
197 /* If developing, add ./appliance to the path. Note that libtools
198 * interferes with this because uninstalled guestfish is a shell
199 * script that runs the real program with an absolute path. Detect
202 * BUT if LIBGUESTFS_PATH environment variable is already set by
203 * the user, then don't override it.
205 if (getenv ("LIBGUESTFS_PATH") == NULL &&
207 (argv[0][0] != '/' || strstr (argv[0], "/.libs/lt-") != NULL))
208 guestfs_set_path (g, "appliance:" GUESTFS_DEFAULT_PATH);
210 /* CAUTION: we are careful to modify argv[0] here, only after
211 * using it just above.
213 * getopt_long uses argv[0], so give it the sanitized name. Save a copy
214 * of the original, in case it's needed in virt-inspector mode, below.
216 char *real_argv0 = argv[0];
217 argv[0] = bad_cast (program_name);
220 c = getopt_long (argc, argv, options, long_options, &option_index);
224 case 0: /* options which are long only */
225 if (STREQ (long_options[option_index].name, "listen"))
226 remote_control_listen = 1;
227 else if (STREQ (long_options[option_index].name, "remote")) {
229 if (sscanf (optarg, "%d", &remote_control) != 1) {
230 fprintf (stderr, _("%s: --listen=PID: PID was not a number: %s\n"),
231 program_name, optarg);
235 p = getenv ("GUESTFISH_PID");
236 if (!p || sscanf (p, "%d", &remote_control) != 1) {
237 fprintf (stderr, _("%s: remote: $GUESTFISH_PID must be set"
238 " to the PID of the remote process\n"),
243 } else if (STREQ (long_options[option_index].name, "selinux")) {
244 guestfs_set_selinux (g, 1);
246 fprintf (stderr, _("%s: unknown long option: %s (%d)\n"),
247 program_name, long_options[option_index].name, option_index);
253 if (access (optarg, R_OK) != 0) {
257 drv = malloc (sizeof (struct drv));
262 drv->filename = optarg;
268 complete_dest_paths = 0;
273 fprintf (stderr, _("%s: only one -f parameter can be given\n"),
284 r = display_command (optarg);
285 else if (argv[optind] && argv[optind][0] != '-')
286 r = display_command (argv[optind++]);
290 exit (r == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
298 mp = malloc (sizeof (struct mp));
303 p = strchr (optarg, ':');
306 mp->mountpoint = p+1;
308 mp->mountpoint = bad_cast ("/");
315 guestfs_set_autosync (g, 0);
324 guestfs_set_verbose (g, verbose);
328 printf ("%s %s\n", program_name, PACKAGE_VERSION);
332 guestfs_set_trace (g, 1);
336 usage (EXIT_SUCCESS);
339 usage (EXIT_FAILURE);
343 /* Inspector mode invalidates most of the other arguments. */
348 if (drvs || mps || remote_control_listen || remote_control ||
349 guestfs_get_selinux (g)) {
350 fprintf (stderr, _("%s: cannot use -i option with -a, -m,"
351 " --listen, --remote or --selinux\n"),
355 if (optind >= argc) {
357 _("%s: -i requires a libvirt domain or path(s) to disk image(s)\n"),
362 strcpy (cmd, "a=`virt-inspector");
363 while (optind < argc) {
364 if (strlen (cmd) + strlen (argv[optind]) + strlen (real_argv0) + 60
367 _("%s: virt-inspector command too long for fixed-size buffer\n"),
372 strcat (cmd, argv[optind]);
378 strcat (cmd, " --ro-fish");
380 strcat (cmd, " --fish");
382 sprintf (&cmd[strlen(cmd)], "` && %s $a", real_argv0);
384 if (guestfs_get_verbose (g))
386 if (!guestfs_get_autosync (g))
388 if (guestfs_get_trace (g))
393 "%s -i: running virt-inspector command:\n%s\n", program_name, cmd);
400 exit (WEXITSTATUS (r));
403 /* If we've got drives to add, add them now. */
406 /* If we've got mountpoints, we must launch the guest and mount them. */
408 /* RHBZ#612178: If --listen flag is given, then we will fork into
409 * the background in rc_listen(). However you can't do this while
410 * holding a libguestfs handle open because the recovery process
411 * will think the main program has died and kill qemu. Therefore
412 * don't use the recovery process for this case. (A better
413 * solution would be to call launch () etc after the fork, but
414 * that greatly complicates the code here).
416 if (remote_control_listen)
417 guestfs_set_recovery_proc (g, 0);
419 if (launch (g) == -1) exit (EXIT_FAILURE);
423 /* Remote control? */
424 if (remote_control_listen && remote_control) {
426 _("%s: cannot use --listen and --remote options at the same time\n"),
431 if (remote_control_listen) {
434 _("%s: extra parameters on the command line with --listen flag\n"),
440 _("%s: cannot use --listen and --file options at the same time\n"),
447 /* -f (file) parameter? */
450 if (open (file, O_RDONLY) == -1) {
456 /* Interactive, shell script, or command(s) on the command line? */
457 if (optind >= argc) {
464 cmdline (argv, optind, argc);
472 pod2text (const char *name, const char *shortdesc, const char *str)
476 fp = popen ("pod2text", "w");
478 /* pod2text failed, maybe not found, so let's just print the
479 * source instead, since that's better than doing nothing.
481 printf ("%s - %s\n\n%s\n", name, shortdesc, str);
484 fprintf (fp, "=head1 NAME\n\n%s - %s\n\n", name, shortdesc);
489 /* List is built in reverse order, so mount them in reverse order. */
491 mount_mps (struct mp *mp)
496 mount_mps (mp->next);
498 /* Don't use guestfs_mount here because that will default to mount
499 * options -o sync,noatime. For more information, see guestfs(3)
500 * section "LIBGUESTFS GOTCHAS".
502 const char *options = read_only ? "ro" : "";
503 r = guestfs_mount_options (g, options, mp->device, mp->mountpoint);
510 add_drives (struct drv *drv)
515 add_drives (drv->next);
517 r = guestfs_add_drive (g, drv->filename);
519 r = guestfs_add_drive_ro (g, drv->filename);
537 #define FISH "><fs> "
539 static char *line_read = NULL;
544 #ifdef HAVE_LIBREADLINE
552 line_read = readline (prompt ? FISH : "");
554 if (line_read && *line_read)
555 add_history_line (line_read);
560 #endif /* HAVE_LIBREADLINE */
562 static char buf[8192];
565 if (prompt) printf (FISH);
566 line_read = fgets (buf, sizeof buf, stdin);
569 len = strlen (line_read);
570 if (len > 0 && buf[len-1] == '\n') buf[len-1] = '\0';
584 int global_exit_on_error = !prompt;
589 "Welcome to guestfish, the libguestfs filesystem interactive shell for\n"
590 "editing virtual machine filesystems.\n"
592 "Type: 'help' for help with commands\n"
593 " 'quit' to quit the shell\n"
599 exit_on_error = global_exit_on_error;
601 buf = rl_gets (prompt);
607 /* Skip any initial whitespace before the command. */
609 while (*buf && c_isspace (*buf))
614 /* If the next character is '#' then this is a comment. */
615 if (*buf == '#') continue;
617 /* If the next character is '!' then pass the whole lot to system(3). */
625 (WTERMSIG (r) == SIGINT || WTERMSIG (r) == SIGQUIT)) ||
626 WEXITSTATUS (r) != 0)
632 /* If the next character is '-' allow the command to fail without
633 * exiting on error (just for this one command though).
641 /* Get the command (cannot be quoted). */
642 len = strcspn (buf, " \t");
644 if (len == 0) continue;
648 if (buf[len] == '\0') {
655 p += strspn (p, " \t");
657 /* Get the parameters. */
658 while (*p && i < sizeof argv / sizeof argv[0]) {
661 /* Parameters which start with quotes or pipes are treated
662 * specially. Bare parameters are delimited by whitespace.
666 len = strcspn (p, "\"");
667 if (p[len] == '\0') {
668 fprintf (stderr, _("%s: unterminated double quote\n"), program_name);
669 if (exit_on_error) exit (EXIT_FAILURE);
672 if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
674 _("%s: command arguments not separated by whitespace\n"),
676 if (exit_on_error) exit (EXIT_FAILURE);
680 pend = p[len+1] ? &p[len+2] : &p[len+1];
681 } else if (*p == '\'') {
683 len = strcspn (p, "'");
684 if (p[len] == '\0') {
685 fprintf (stderr, _("%s: unterminated single quote\n"), program_name);
686 if (exit_on_error) exit (EXIT_FAILURE);
689 if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
691 _("%s: command arguments not separated by whitespace\n"),
693 if (exit_on_error) exit (EXIT_FAILURE);
697 pend = p[len+1] ? &p[len+2] : &p[len+1];
698 } else if (*p == '|') {
703 } else if (*p == '[') {
707 while (*pend && c != 0) {
708 if (*pend == '[') c++;
709 else if (*pend == ']') c--;
714 _("%s: unterminated \"[...]\" sequence\n"), program_name);
715 if (exit_on_error) exit (EXIT_FAILURE);
718 if (*pend && (*pend != ' ' && *pend != '\t')) {
720 _("%s: command arguments not separated by whitespace\n"),
722 if (exit_on_error) exit (EXIT_FAILURE);
727 } else if (*p != ' ' && *p != '\t') {
728 /* If the first character is a ~ then note that this parameter
729 * is a candidate for ~username expansion. NB this does not
730 * apply to quoted parameters.
732 tilde_candidate = *p == '~';
733 len = strcspn (p, " \t");
740 fprintf (stderr, _("%s: internal error parsing string at '%s'\n"),
745 if (!tilde_candidate)
748 argv[i] = try_tilde_expansion (p);
753 p += strspn (p, " \t");
756 if (i == sizeof argv / sizeof argv[0]) {
757 fprintf (stderr, _("%s: too many arguments\n"), program_name);
758 if (exit_on_error) exit (EXIT_FAILURE);
765 if (issue_command (cmd, argv, pipe) == -1) {
766 if (exit_on_error) exit (EXIT_FAILURE);
771 if (prompt) printf ("\n");
775 cmdline (char *argv[], int optind, int argc)
782 if (optind >= argc) return;
784 cmd = argv[optind++];
785 if (STREQ (cmd, ":")) {
786 fprintf (stderr, _("%s: empty command on command line\n"), program_name);
790 /* Allow -cmd on the command line to mean (temporarily) override
791 * the normal exit on error (RHBZ#578407).
798 params = &argv[optind];
800 /* Search for end of command list or ":" ... */
801 while (optind < argc && STRNEQ (argv[optind], ":"))
804 if (optind == argc) {
805 if (issue_command (cmd, params, NULL) == -1 && exit_on_error)
809 if (issue_command (cmd, params, NULL) == -1 && exit_on_error)
811 cmdline (argv, optind+1, argc);
816 issue_command (const char *cmd, char *argv[], const char *pipecmd)
819 int stdout_saved_fd = -1;
823 /* This counts the commands issued, starting at 1. */
826 /* For | ... commands. Annoyingly we can't use popen(3) here. */
830 if (fflush (stdout) == EOF) {
831 perror ("failed to flush standard output");
835 perror ("pipe failed");
844 if (pid == 0) { /* Child process. */
846 if (dup2 (fd[0], 0) < 0) {
847 perror ("dup2 of stdin failed");
851 r = system (pipecmd);
856 _exit (WEXITSTATUS (r));
859 if ((stdout_saved_fd = dup (1)) < 0) {
860 perror ("failed to dup stdout");
864 if (dup2 (fd[1], 1) < 0) {
865 perror ("failed to dup stdout");
866 close (stdout_saved_fd);
872 for (argc = 0; argv[argc] != NULL; ++argc)
875 /* If --remote was set, then send this command to a remote process. */
877 r = rc_remote (remote_control, cmd, argc, argv, exit_on_error);
879 /* Otherwise execute it locally. */
880 else if (STRCASEEQ (cmd, "help")) {
885 r = display_command (argv[0]);
887 else if (STRCASEEQ (cmd, "quit") ||
888 STRCASEEQ (cmd, "exit") ||
889 STRCASEEQ (cmd, "q")) {
893 else if (STRCASEEQ (cmd, "alloc") ||
894 STRCASEEQ (cmd, "allocate"))
895 r = do_alloc (cmd, argc, argv);
896 else if (STRCASEEQ (cmd, "echo"))
897 r = do_echo (cmd, argc, argv);
898 else if (STRCASEEQ (cmd, "edit") ||
899 STRCASEEQ (cmd, "vi") ||
900 STRCASEEQ (cmd, "emacs"))
901 r = do_edit (cmd, argc, argv);
902 else if (STRCASEEQ (cmd, "lcd"))
903 r = do_lcd (cmd, argc, argv);
904 else if (STRCASEEQ (cmd, "glob"))
905 r = do_glob (cmd, argc, argv);
906 else if (STRCASEEQ (cmd, "more") ||
907 STRCASEEQ (cmd, "less"))
908 r = do_more (cmd, argc, argv);
909 else if (STRCASEEQ (cmd, "reopen"))
910 r = do_reopen (cmd, argc, argv);
911 else if (STRCASEEQ (cmd, "sparse"))
912 r = do_sparse (cmd, argc, argv);
913 else if (STRCASEEQ (cmd, "time"))
914 r = do_time (cmd, argc, argv);
916 r = run_action (cmd, argc, argv);
918 /* Always flush stdout after every command, so that messages, results
919 * etc appear immediately.
921 if (fflush (stdout) == EOF) {
922 perror ("failed to flush standard output");
928 if (dup2 (stdout_saved_fd, 1) < 0) {
929 perror ("failed to dup2 standard output");
932 close (stdout_saved_fd);
933 if (waitpid (pid, NULL, 0) < 0) {
934 perror ("waiting for command to complete");
943 list_builtin_commands (void)
945 /* help and quit should appear at the top */
946 printf ("%-20s %s\n",
947 "help", _("display a list of commands or help on a command"));
948 printf ("%-20s %s\n",
949 "quit", _("quit guestfish"));
951 printf ("%-20s %s\n",
952 "alloc", _("allocate an image"));
953 printf ("%-20s %s\n",
954 "echo", _("display a line of text"));
955 printf ("%-20s %s\n",
956 "edit", _("edit a file in the image"));
957 printf ("%-20s %s\n",
958 "lcd", _("local change directory"));
959 printf ("%-20s %s\n",
960 "glob", _("expand wildcards in command"));
961 printf ("%-20s %s\n",
962 "more", _("view a file in the pager"));
963 printf ("%-20s %s\n",
964 "reopen", _("close and reopen libguestfs handle"));
965 printf ("%-20s %s\n",
966 "sparse", _("allocate a sparse image file"));
967 printf ("%-20s %s\n",
968 "time", _("measure time taken to run command"));
970 /* actions are printed after this (see list_commands) */
974 display_builtin_command (const char *cmd)
976 /* help for actions is auto-generated, see display_command */
978 if (STRCASEEQ (cmd, "alloc") ||
979 STRCASEEQ (cmd, "allocate")) {
980 printf (_("alloc - allocate an image\n"
981 " alloc <filename> <size>\n"
983 " This creates an empty (zeroed) file of the given size,\n"
984 " and then adds so it can be further examined.\n"
986 " For more advanced image creation, see qemu-img utility.\n"
988 " Size can be specified (where <nn> means a number):\n"
989 " <nn> number of kilobytes\n"
990 " eg: 1440 standard 3.5\" floppy\n"
991 " <nn>K or <nn>KB number of kilobytes\n"
992 " <nn>M or <nn>MB number of megabytes\n"
993 " <nn>G or <nn>GB number of gigabytes\n"
994 " <nn>T or <nn>TB number of terabytes\n"
995 " <nn>P or <nn>PB number of petabytes\n"
996 " <nn>E or <nn>EB number of exabytes\n"
997 " <nn>sects number of 512 byte sectors\n"));
1000 else if (STRCASEEQ (cmd, "echo")) {
1001 printf (_("echo - display a line of text\n"
1002 " echo [<params> ...]\n"
1004 " This echos the parameters to the terminal.\n"));
1007 else if (STRCASEEQ (cmd, "edit") ||
1008 STRCASEEQ (cmd, "vi") ||
1009 STRCASEEQ (cmd, "emacs")) {
1010 printf (_("edit - edit a file in the image\n"
1011 " edit <filename>\n"
1013 " This is used to edit a file.\n"
1015 " It is the equivalent of (and is implemented by)\n"
1016 " running \"cat\", editing locally, and then \"write-file\".\n"
1018 " Normally it uses $EDITOR, but if you use the aliases\n"
1019 " \"vi\" or \"emacs\" you will get those editors.\n"
1021 " NOTE: This will not work reliably for large files\n"
1022 " (> 2 MB) or binary files containing \\0 bytes.\n"));
1025 else if (STRCASEEQ (cmd, "lcd")) {
1026 printf (_("lcd - local change directory\n"
1027 " lcd <directory>\n"
1029 " Change guestfish's current directory. This command is\n"
1030 " useful if you want to download files to a particular\n"
1034 else if (STRCASEEQ (cmd, "glob")) {
1035 printf (_("glob - expand wildcards in command\n"
1036 " glob <command> [<args> ...]\n"
1038 " Glob runs <command> with wildcards expanded in any\n"
1039 " command args. Note that the command is run repeatedly\n"
1040 " once for each expanded argument.\n"));
1043 else if (STRCASEEQ (cmd, "help")) {
1044 printf (_("help - display a list of commands or help on a command\n"
1049 else if (STRCASEEQ (cmd, "more") ||
1050 STRCASEEQ (cmd, "less")) {
1051 printf (_("more - view a file in the pager\n"
1052 " more <filename>\n"
1054 " This is used to view a file in the pager.\n"
1056 " It is the equivalent of (and is implemented by)\n"
1057 " running \"cat\" and using the pager.\n"
1059 " Normally it uses $PAGER, but if you use the alias\n"
1060 " \"less\" then it always uses \"less\".\n"
1062 " NOTE: This will not work reliably for large files\n"
1063 " (> 2 MB) or binary files containing \\0 bytes.\n"));
1066 else if (STRCASEEQ (cmd, "quit") ||
1067 STRCASEEQ (cmd, "exit") ||
1068 STRCASEEQ (cmd, "q")) {
1069 printf (_("quit - quit guestfish\n"
1073 else if (STRCASEEQ (cmd, "reopen")) {
1074 printf (_("reopen - close and reopen the libguestfs handle\n"
1077 "Close and reopen the libguestfs handle. It is not necessary to use\n"
1078 "this normally, because the handle is closed properly when guestfish\n"
1079 "exits. However this is occasionally useful for testing.\n"));
1082 else if (STRCASEEQ (cmd, "sparse")) {
1083 printf (_("sparse - allocate a sparse image file\n"
1084 " sparse <filename> <size>\n"
1086 " This creates an empty sparse file of the given size,\n"
1087 " and then adds so it can be further examined.\n"
1089 " In all respects it works the same as the 'alloc'\n"
1090 " command, except that the image file is allocated\n"
1091 " sparsely, which means that disk blocks are not assigned\n"
1092 " to the file until they are needed. Sparse disk files\n"
1093 " only use space when written to, but they are slower\n"
1094 " and there is a danger you could run out of real disk\n"
1095 " space during a write operation.\n"
1097 " For more advanced image creation, see qemu-img utility.\n"
1099 " Size can be specified (where <nn> means a number):\n"
1100 " <nn> number of kilobytes\n"
1101 " eg: 1440 standard 3.5\" floppy\n"
1102 " <nn>K or <nn>KB number of kilobytes\n"
1103 " <nn>M or <nn>MB number of megabytes\n"
1104 " <nn>G or <nn>GB number of gigabytes\n"
1105 " <nn>T or <nn>TB number of terabytes\n"
1106 " <nn>P or <nn>PB number of petabytes\n"
1107 " <nn>E or <nn>EB number of exabytes\n"
1108 " <nn>sects number of 512 byte sectors\n"));
1111 else if (STRCASEEQ (cmd, "time")) {
1112 printf (_("time - measure time taken to run command\n"
1113 " time <command> [<args> ...]\n"
1115 " This runs <command> as usual, and prints the elapsed\n"
1116 " time afterwards.\n"));
1120 fprintf (stderr, _("%s: command not known, use -h to list all commands\n"),
1126 /* This is printed when the user types in an unknown command for the
1127 * first command issued. A common case is the user doing:
1128 * guestfish disk.img
1129 * expecting guestfish to open 'disk.img' (in fact, this tried to
1130 * run a command 'disk.img').
1133 extended_help_message (void)
1136 _("Did you mean to open a disk image? guestfish -a disk.img\n"
1137 "For a list of commands: guestfish -h\n"
1138 "For complete documentation: man guestfish\n"));
1142 free_strings (char **argv)
1146 for (argc = 0; argv[argc] != NULL; ++argc)
1152 count_strings (char *const *argv)
1156 for (c = 0; argv[c]; ++c)
1162 print_strings (char *const *argv)
1166 for (argc = 0; argv[argc] != NULL; ++argc)
1167 printf ("%s\n", argv[argc]);
1171 print_table (char *const *argv)
1175 for (i = 0; argv[i] != NULL; i += 2)
1176 printf ("%s: %s\n", argv[i], argv[i+1]);
1180 is_true (const char *str)
1183 STRCASENEQ (str, "0") &&
1184 STRCASENEQ (str, "f") &&
1185 STRCASENEQ (str, "false") &&
1186 STRCASENEQ (str, "n") &&
1187 STRCASENEQ (str, "no");
1190 /* Free strings from a non-NULL terminated char** */
1192 free_n_strings (char **str, size_t len)
1196 for (i = 0; i < len; i++) {
1203 parse_string_list (const char *str)
1206 size_t argv_len = 0;
1208 /* Current position pointer */
1209 const char *p = str;
1211 /* Token might be simple:
1214 * 'This is a single token'
1215 * or contain embedded single-quoted sections:
1216 * This' is a sing'l'e to'ken
1218 * The latter may seem over-complicated, but it's what a normal shell does.
1219 * Not doing it risks surprising somebody.
1221 * This outer loop is over complete tokens.
1227 /* Skip leading whitespace */
1228 p += strspn (p, " \t");
1232 /* This loop is over token 'fragments'. A token can be in multiple bits if
1233 * it contains single quotes. We also treat both sides of an escaped quote
1234 * as separate fragments because we can't just copy it: we have to remove
1237 while (*p && (!c_isblank (*p) || in_quote)) {
1238 const char *end = p;
1240 /* Check if the fragment starts with a quote */
1242 /* Toggle in_quote */
1243 in_quote = !in_quote;
1245 /* Skip the quote */
1249 /* If we're in a quote, look for an end quote */
1251 end += strcspn (end, "'");
1254 /* Otherwise, look for whitespace or a quote */
1256 end += strcspn (end, " \t'");
1259 /* Grow the token to accommodate the fragment */
1260 size_t tok_end = tok_len;
1262 char *tok_new = realloc (tok, tok_len + 1);
1263 if (NULL == tok_new) {
1265 free_n_strings (argv, argv_len);
1267 exit (EXIT_FAILURE);
1271 /* Check if we stopped on an escaped quote */
1272 if ('\'' == *end && end != p && *(end-1) == '\\') {
1273 /* Add everything before \' to the token */
1274 memcpy (&tok[tok_end], p, end - p - 1);
1277 tok[tok_len-1] = '\'';
1279 /* Already processed the quote */
1284 /* Add the whole fragment */
1285 memcpy (&tok[tok_end], p, end - p);
1291 /* We've reached the end of a token. We shouldn't still be in quotes. */
1293 fprintf (stderr, _("Runaway quote in string \"%s\"\n"), str);
1295 free_n_strings (argv, argv_len);
1300 /* Add this token if there is one. There might not be if there was
1301 * whitespace at the end of the input string */
1303 /* Add the NULL terminator */
1304 tok[tok_len] = '\0';
1306 /* Add the argument to the argument list */
1308 char **argv_new = realloc (argv, sizeof (*argv) * argv_len);
1309 if (NULL == argv_new) {
1311 free_n_strings (argv, argv_len-1);
1313 exit (EXIT_FAILURE);
1317 argv[argv_len-1] = tok;
1321 /* NULL terminate the argument list */
1323 char **argv_new = realloc (argv, sizeof (*argv) * argv_len);
1324 if (NULL == argv_new) {
1326 free_n_strings (argv, argv_len-1);
1327 exit (EXIT_FAILURE);
1331 argv[argv_len-1] = NULL;
1336 #ifdef HAVE_LIBREADLINE
1337 static char histfile[1024];
1338 static int nr_history_lines = 0;
1342 initialize_readline (void)
1344 #ifdef HAVE_LIBREADLINE
1347 home = getenv ("HOME");
1349 snprintf (histfile, sizeof histfile, "%s/.guestfish", home);
1351 (void) read_history (histfile);
1354 rl_readline_name = "guestfish";
1355 rl_attempted_completion_function = do_completion;
1357 /* Note that .inputrc (or /etc/inputrc) is not read until the first
1358 * call the readline(), which happens later. Therefore, these
1359 * provide default values which can be overridden by the user if
1362 (void) rl_variable_bind ("completion-ignore-case", "on");
1367 cleanup_readline (void)
1369 #ifdef HAVE_LIBREADLINE
1372 if (histfile[0] != '\0') {
1373 fd = open (histfile, O_WRONLY|O_CREAT, 0644);
1380 #ifdef HAVE_APPEND_HISTORY
1381 (void) append_history (nr_history_lines, histfile);
1383 (void) write_history (histfile);
1389 #ifdef HAVE_LIBREADLINE
1391 add_history_line (const char *line)
1399 xwrite (int fd, const void *v_buf, size_t len)
1402 const char *buf = v_buf;
1405 r = write (fd, buf, len);
1417 /* Resolve the special "win:..." form for Windows-specific paths.
1418 * This always returns a newly allocated string which is freed by the
1419 * caller function in "cmds.c".
1422 resolve_win_path (const char *path)
1427 if (STRCASENEQLEN (path, "win:", 4)) {
1428 ret = strdup (path);
1436 /* Drop drive letter, if it's "C:". */
1437 if (STRCASEEQLEN (path, "c:", 2))
1447 ret = strdup (path);
1453 /* Blindly convert any backslashes into forward slashes. Is this good? */
1454 for (i = 0; i < strlen (ret); ++i)
1458 char *t = guestfs_case_sensitive_path (g, ret);