/* guestfish - the filesystem interactive shell
- * Copyright (C) 2009 Red Hat Inc.
+ * Copyright (C) 2009-2010 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <stdio.h>
#include <stdlib.h>
+#include <inttypes.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <getopt.h>
#include <signal.h>
-#include <assert.h>
#include <sys/types.h>
#include <sys/wait.h>
+#include <locale.h>
+#include <langinfo.h>
#ifdef HAVE_LIBREADLINE
#include <readline/readline.h>
#include <guestfs.h>
#include "fish.h"
+#include "options.h"
+
#include "c-ctype.h"
#include "closeout.h"
#include "progname.h"
-struct mp {
- struct mp *next;
- char *device;
- char *mountpoint;
-};
-
-struct drv {
- struct drv *next;
- char *filename;
-};
-
-static void add_drives (struct drv *drv);
-static void mount_mps (struct mp *mp);
+static void set_up_terminal (void);
+static void prepare_drives (struct drv *drv);
+static int launch (void);
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 initialize_readline (void);
static void cleanup_readline (void);
+#ifdef HAVE_LIBREADLINE
static void add_history_line (const char *);
+#endif
+
+static int override_progress_bars = -1;
/* Currently open libguestfs handle. */
guestfs_h *g;
int read_only = 0;
int quit = 0;
int verbose = 0;
-int echo_commands = 0;
int remote_control_listen = 0;
+int remote_control_csh = 0;
int remote_control = 0;
int exit_on_error = 1;
-
-int
-launch (guestfs_h *_g)
-{
- assert (_g == g);
-
- if (guestfs_is_config (g)) {
- if (guestfs_launch (g) == -1)
- return -1;
- }
- return 0;
-}
+int command_num = 0;
+int keys_from_stdin = 0;
+int echo_keys = 0;
+const char *libvirt_uri = NULL;
+int inspector = 0;
+int utf8_mode = 0;
+int have_terminfo = 0;
+int progress_bars = 0;
static void __attribute__((noreturn))
usage (int status)
fprintf (stdout,
_("%s: guest filesystem shell\n"
"%s lets you edit virtual machine filesystems\n"
- "Copyright (C) 2009 Red Hat Inc.\n"
+ "Copyright (C) 2009-2010 Red Hat Inc.\n"
"Usage:\n"
" %s [--options] cmd [: cmd : cmd ...]\n"
- " %s -i libvirt-domain\n"
- " %s -i disk-image(s)\n"
+ " %s [--ro] -i -a disk-image\n"
+ " %s [--ro] -i -d libvirt-domain\n"
"or for interactive use:\n"
" %s\n"
"or from a shell script:\n"
" -h|--cmd-help List available commands\n"
" -h|--cmd-help cmd Display detailed help on 'cmd'\n"
" -a|--add image Add image\n"
+ " -c|--connect uri Specify libvirt URI for -d option\n"
+ " --csh Make --listen csh-compatible\n"
+ " -d|--domain guest Add disks from libvirt guest\n"
" -D|--no-dest-paths Don't tab-complete paths from guest fs\n"
+ " --echo-keys Don't turn off echo for passphrases\n"
" -f|--file file Read commands from file\n"
- " -i|--inspector Run virt-inspector to get disk mountpoints\n"
+ " --format[=raw|..] Force disk format for -a option\n"
+ " -i|--inspector Automatically mount filesystems\n"
+ " --keys-from-stdin Read passphrases from stdin\n"
" --listen Listen for remote commands\n"
" -m|--mount dev[:mnt] Mount dev on mnt (if omitted, /)\n"
" -n|--no-sync Don't autosync\n"
+ " -N|--new type Create prepared disk (test1.img, ...)\n"
+ " --progress-bars Enable progress bars even when not interactive\n"
+ " --no-progress-bars Disable progress bars\n"
" --remote[=pid] Send commands to remote %s\n"
" -r|--ro Mount read-only\n"
" --selinux Enable SELinux support\n"
" -v|--verbose Verbose messages\n"
- " -x Echo each command before executing it\n"
" -V|--version Display version and exit\n"
- "For more information, see the manpage %s(1).\n"),
+ " -x Echo each command before executing it\n"
+ "For more information, see the manpage %s(1).\n"),
program_name, program_name, program_name,
program_name, program_name, program_name,
program_name, program_name, program_name);
atexit (close_stdout);
+ setlocale (LC_ALL, "");
+ bindtextdomain (PACKAGE, LOCALEBASEDIR);
+ textdomain (PACKAGE);
+
+ set_up_terminal ();
+
enum { HELP_OPTION = CHAR_MAX + 1 };
- static const char *options = "a:Df:h::im:nrv?Vx";
+ static const char *options = "a:c:d:Df:h::im:nN:rv?Vwx";
static const struct option long_options[] = {
{ "add", 1, 0, 'a' },
{ "cmd-help", 2, 0, 'h' },
+ { "connect", 1, 0, 'c' },
+ { "csh", 0, 0, 0 },
+ { "domain", 1, 0, 'd' },
+ { "echo-keys", 0, 0, 0 },
{ "file", 1, 0, 'f' },
+ { "format", 2, 0, 0 },
{ "help", 0, 0, HELP_OPTION },
{ "inspector", 0, 0, 'i' },
+ { "keys-from-stdin", 0, 0, 0 },
{ "listen", 0, 0, 0 },
{ "mount", 1, 0, 'm' },
+ { "new", 1, 0, 'N' },
{ "no-dest-paths", 0, 0, 'D' },
{ "no-sync", 0, 0, 'n' },
+ { "progress-bars", 0, 0, 0 },
+ { "no-progress-bars", 0, 0, 0 },
{ "remote", 2, 0, 0 },
{ "ro", 0, 0, 'r' },
+ { "rw", 0, 0, 'w' },
{ "selinux", 0, 0, 0 },
{ "verbose", 0, 0, 'v' },
{ "version", 0, 0, 'V' },
struct mp *mps = NULL;
struct mp *mp;
char *p, *file = NULL;
+ const char *format = NULL;
int c;
- int inspector = 0;
int option_index;
struct sigaction sa;
+ int next_prepared_drive = 1;
initialize_readline ();
exit (EXIT_FAILURE);
}
- guestfs_set_autosync (g, 1);
-
/* If developing, add ./appliance 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
* using it just above.
*
* getopt_long uses argv[0], so give it the sanitized name. Save a copy
- * of the original, in case it's needed in virt-inspector mode, below.
+ * of the original, in case it's needed below.
*/
char *real_argv0 = argv[0];
argv[0] = bad_cast (program_name);
}
} else if (STREQ (long_options[option_index].name, "selinux")) {
guestfs_set_selinux (g, 1);
+ } else if (STREQ (long_options[option_index].name, "keys-from-stdin")) {
+ keys_from_stdin = 1;
+ } else if (STREQ (long_options[option_index].name, "progress-bars")) {
+ override_progress_bars = 1;
+ } else if (STREQ (long_options[option_index].name, "no-progress-bars")) {
+ override_progress_bars = 0;
+ } else if (STREQ (long_options[option_index].name, "echo-keys")) {
+ echo_keys = 1;
+ } else if (STREQ (long_options[option_index].name, "format")) {
+ if (!optarg || STREQ (optarg, ""))
+ format = NULL;
+ else
+ format = optarg;
+ } else if (STREQ (long_options[option_index].name, "csh")) {
+ remote_control_csh = 1;
} else {
fprintf (stderr, _("%s: unknown long option: %s (%d)\n"),
program_name, long_options[option_index].name, option_index);
break;
case 'a':
- if (access (optarg, R_OK) != 0) {
- perror (optarg);
- exit (EXIT_FAILURE);
- }
- drv = malloc (sizeof (struct drv));
- if (!drv) {
- perror ("malloc");
- exit (EXIT_FAILURE);
- }
- drv->filename = optarg;
- drv->next = drvs;
- drvs = drv;
+ OPTION_a;
+ break;
+
+ case 'c':
+ OPTION_c;
+ break;
+
+ case 'd':
+ OPTION_d;
break;
case 'D':
file = optarg;
break;
- case 'h':
+ case 'h': {
+ int r = 0;
+
if (optarg)
- display_command (optarg);
+ r = display_command (optarg);
else if (argv[optind] && argv[optind][0] != '-')
- display_command (argv[optind++]);
+ r = display_command (argv[optind++]);
else
list_commands ();
- exit (EXIT_SUCCESS);
+
+ exit (r == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
+ }
case 'i':
- inspector = 1;
+ OPTION_i;
break;
case 'm':
- mp = malloc (sizeof (struct mp));
- if (!mp) {
- perror ("malloc");
- exit (EXIT_FAILURE);
- }
- p = strchr (optarg, ':');
- if (p) {
- *p = '\0';
- mp->mountpoint = p+1;
- } else
- mp->mountpoint = bad_cast ("/");
- mp->device = optarg;
- mp->next = mps;
- mps = mp;
+ OPTION_m;
break;
case 'n':
- guestfs_set_autosync (g, 0);
+ OPTION_n;
+ break;
+
+ case 'N':
+ if (STRCASEEQ (optarg, "list") ||
+ STRCASEEQ (optarg, "help") ||
+ STRCASEEQ (optarg, "h") ||
+ STRCASEEQ (optarg, "?")) {
+ list_prepared_drives ();
+ exit (EXIT_SUCCESS);
+ }
+ drv = malloc (sizeof (struct drv));
+ if (!drv) {
+ perror ("malloc");
+ exit (EXIT_FAILURE);
+ }
+ drv->type = drv_N;
+ if (asprintf (&drv->N.filename, "test%d.img",
+ next_prepared_drive++) == -1) {
+ perror ("asprintf");
+ exit (EXIT_FAILURE);
+ }
+ drv->N.data = create_prepared_file (optarg, drv->N.filename);
+ drv->N.data_free = free_prep_data;
+ drv->N.device = NULL; /* filled in by add_drives */
+ drv->next = drvs;
+ drvs = drv;
break;
case 'r':
- read_only = 1;
+ OPTION_r;
break;
case 'v':
- verbose++;
- guestfs_set_verbose (g, verbose);
+ OPTION_v;
break;
case 'V':
- printf ("%s %s\n", program_name, PACKAGE_VERSION);
- exit (EXIT_SUCCESS);
+ OPTION_V;
+ break;
+
+ case 'w':
+ OPTION_w;
+ break;
case 'x':
- echo_commands = 1;
+ OPTION_x;
break;
case HELP_OPTION:
- usage (0);
+ usage (EXIT_SUCCESS);
default:
- usage (1);
+ usage (EXIT_FAILURE);
}
}
- /* Inspector mode invalidates most of the other arguments. */
- if (inspector) {
- char cmd[1024];
- int r;
-
- if (drvs || mps || remote_control_listen || remote_control ||
- guestfs_get_selinux (g)) {
- fprintf (stderr, _("%s: cannot use -i option with -a, -m,"
- " --listen, --remote or --selinux\n"),
- program_name);
- exit (EXIT_FAILURE);
- }
- if (optind >= argc) {
- fprintf (stderr,
- _("%s: -i requires a libvirt domain or path(s) to disk image(s)\n"),
- program_name);
- exit (EXIT_FAILURE);
- }
-
- strcpy (cmd, "a=`virt-inspector");
+ /* Old-style -i syntax? Since -a/-d/-N and -i was disallowed
+ * previously, if we have -i without any drives but with something
+ * on the command line, it must be old-style syntax.
+ */
+ if (inspector && drvs == NULL && optind < argc) {
while (optind < argc) {
- if (strlen (cmd) + strlen (argv[optind]) + strlen (real_argv0) + 60
- >= sizeof cmd) {
- fprintf (stderr,
- _("%s: virt-inspector command too long for fixed-size buffer\n"),
- program_name);
- exit (EXIT_FAILURE);
+ if (strchr (argv[optind], '/') ||
+ access (argv[optind], F_OK) == 0) { /* simulate -a option */
+ drv = malloc (sizeof (struct drv));
+ if (!drv) {
+ perror ("malloc");
+ exit (EXIT_FAILURE);
+ }
+ drv->type = drv_a;
+ drv->a.filename = argv[optind];
+ drv->a.format = NULL;
+ drv->next = drvs;
+ drvs = drv;
+ } else { /* simulate -d option */
+ drv = malloc (sizeof (struct drv));
+ if (!drv) {
+ perror ("malloc");
+ exit (EXIT_FAILURE);
+ }
+ drv->type = drv_d;
+ drv->d.guest = argv[optind];
+ drv->next = drvs;
+ drvs = drv;
}
- strcat (cmd, " '");
- strcat (cmd, argv[optind]);
- strcat (cmd, "'");
+
optind++;
}
+ }
- if (read_only)
- strcat (cmd, " --ro-fish");
- else
- strcat (cmd, " --fish");
-
- sprintf (&cmd[strlen(cmd)], "` && %s $a", real_argv0);
-
- if (guestfs_get_verbose (g))
- strcat (cmd, " -v");
- if (!guestfs_get_autosync (g))
- strcat (cmd, " -n");
+ /* If we've got drives to add, add them now. */
+ add_drives (drvs, 'a');
- if (verbose)
- fprintf (stderr,
- "%s -i: running virt-inspector command:\n%s\n", program_name, cmd);
+ /* If we've got mountpoints or prepared drives or -i option, we must
+ * launch the guest and mount them.
+ */
+ if (next_prepared_drive > 1 || mps != NULL || inspector) {
+ /* RHBZ#612178: If --listen flag is given, then we will fork into
+ * the background in rc_listen(). However you can't do this while
+ * holding a libguestfs handle open because the recovery process
+ * will think the main program has died and kill qemu. Therefore
+ * don't use the recovery process for this case. (A better
+ * solution would be to call launch () etc after the fork, but
+ * that greatly complicates the code here).
+ */
+ if (remote_control_listen)
+ guestfs_set_recovery_proc (g, 0);
- r = system (cmd);
- if (r == -1) {
- perror ("system");
- exit (EXIT_FAILURE);
- }
- exit (WEXITSTATUS (r));
- }
+ if (launch () == -1) exit (EXIT_FAILURE);
- /* If we've got drives to add, add them now. */
- add_drives (drvs);
+ if (inspector)
+ inspect_mount ();
- /* If we've got mountpoints, we must launch the guest and mount them. */
- if (mps != NULL) {
- if (launch (g) == -1) exit (EXIT_FAILURE);
+ prepare_drives (drvs);
mount_mps (mps);
}
+ /* Free up data structures, no longer needed after this point. */
+ free_drives (drvs);
+ free_mps (mps);
+
/* Remote control? */
if (remote_control_listen && remote_control) {
fprintf (stderr,
}
}
+ /* Decide if we display progress bars. */
+ progress_bars =
+ override_progress_bars >= 0
+ ? override_progress_bars
+ : (optind >= argc && isatty (0));
+
+ if (progress_bars)
+ guestfs_set_progress_callback (g, progress_callback, NULL);
+
/* Interactive, shell script, or command(s) on the command line? */
if (optind >= argc) {
if (isatty (0))
exit (EXIT_SUCCESS);
}
+/* The <term.h> header file which defines this has "issues". */
+extern int tgetent (char *, const char *);
+
+static void
+set_up_terminal (void)
+{
+ /* http://www.cl.cam.ac.uk/~mgk25/unicode.html#activate */
+ utf8_mode = STREQ (nl_langinfo (CODESET), "UTF-8");
+
+ char *term = getenv ("TERM");
+ if (term == NULL) {
+ //fprintf (stderr, _("guestfish: TERM (terminal type) not defined.\n"));
+ return;
+ }
+
+ int r = tgetent (NULL, term);
+ if (r == -1) {
+ fprintf (stderr, _("guestfish: could not access termcap or terminfo database.\n"));
+ return;
+ }
+ if (r == 0) {
+ fprintf (stderr, _("guestfish: terminal type \"%s\" not defined.\n"),
+ term);
+ return;
+ }
+
+ have_terminfo = 1;
+}
+
void
pod2text (const char *name, const char *shortdesc, const char *str)
{
pclose (fp);
}
-/* List is built in reverse order, so mount them in reverse order. */
static void
-mount_mps (struct mp *mp)
+prepare_drives (struct drv *drv)
{
- int r;
-
- if (mp) {
- mount_mps (mp->next);
- if (!read_only)
- r = guestfs_mount (g, mp->device, mp->mountpoint);
- else
- r = guestfs_mount_ro (g, mp->device, mp->mountpoint);
- if (r == -1)
- exit (EXIT_FAILURE);
+ if (drv) {
+ prepare_drives (drv->next);
+ if (drv->type == drv_N)
+ prepare_drive (drv->N.filename, drv->N.data, drv->N.device);
}
}
-static void
-add_drives (struct drv *drv)
+static int
+launch (void)
{
- int r;
-
- if (drv) {
- add_drives (drv->next);
- if (!read_only)
- r = guestfs_add_drive (g, drv->filename);
- else
- r = guestfs_add_drive_ro (g, drv->filename);
- if (r == -1)
- exit (EXIT_FAILURE);
+ if (guestfs_is_config (g)) {
+ if (guestfs_launch (g) == -1)
+ return -1;
}
+ return 0;
}
static void
int global_exit_on_error = !prompt;
int tilde_candidate;
- if (prompt)
+ 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"
+ "Type: 'help' for help on commands\n"
+ " 'man' to read the manual\n"
" 'quit' to quit the shell\n"
"\n"));
+ if (inspector) {
+ print_inspect_prompt ();
+ printf ("\n");
+ }
+ }
+
while (!quit) {
char *pipe = NULL;
fprintf (stderr, _("%s: empty command on command line\n"), program_name);
exit (EXIT_FAILURE);
}
+
+ /* Allow -cmd on the command line to mean (temporarily) override
+ * the normal exit on error (RHBZ#578407).
+ */
+ if (cmd[0] == '-') {
+ exit_on_error = 0;
+ cmd++;
+ }
+
params = &argv[optind];
/* Search for end of command list or ":" ... */
optind++;
if (optind == argc) {
- if (issue_command (cmd, params, NULL) == -1) exit (EXIT_FAILURE);
+ if (issue_command (cmd, params, NULL) == -1 && exit_on_error)
+ exit (EXIT_FAILURE);
} else {
argv[optind] = NULL;
- if (issue_command (cmd, params, NULL) == -1) exit (EXIT_FAILURE);
+ if (issue_command (cmd, params, NULL) == -1 && exit_on_error)
+ exit (EXIT_FAILURE);
cmdline (argv, optind+1, argc);
}
}
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");
- }
+ reset_progress_bar ();
+
+ /* This counts the commands issued, starting at 1. */
+ command_num++;
/* For | ... commands. Annoyingly we can't use popen(3) here. */
if (pipecmd) {
/* Otherwise execute it locally. */
else if (STRCASEEQ (cmd, "help")) {
- if (argc == 0)
- list_commands ();
- else
- display_command (argv[0]);
- r = 0;
+ if (argc == 0) {
+ display_help ();
+ r = 0;
+ } else
+ r = display_command (argv[0]);
}
else if (STRCASEEQ (cmd, "quit") ||
STRCASEEQ (cmd, "exit") ||
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);
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
+int
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"))
+ 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"));
+ return 0;
+ }
else if (STRCASEEQ (cmd, "quit") ||
STRCASEEQ (cmd, "exit") ||
- STRCASEEQ (cmd, "q"))
+ 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
+ return 0;
+ }
+ else {
fprintf (stderr, _("%s: command not known, use -h to list all commands\n"),
cmd);
+ return -1;
+ }
+}
+
+/* This is printed when the user types in an unknown command for the
+ * first command issued. A common case is the user doing:
+ * guestfish disk.img
+ * expecting guestfish to open 'disk.img' (in fact, this tried to
+ * run a command 'disk.img').
+ */
+void
+extended_help_message (void)
+{
+ fprintf (stderr,
+ _("Did you mean to open a disk image? guestfish -a disk.img\n"
+ "For a list of commands: guestfish -h\n"
+ "For complete documentation: man guestfish\n"));
}
void
rl_readline_name = "guestfish";
rl_attempted_completion_function = do_completion;
+
+ /* Note that .inputrc (or /etc/inputrc) is not read until the first
+ * call the readline(), which happens later. Therefore, these
+ * provide default values which can be overridden by the user if
+ * they wish.
+ */
+ (void) rl_variable_bind ("completion-ignore-case", "on");
#endif
}
}
close (fd);
+#ifdef HAVE_APPEND_HISTORY
(void) append_history (nr_history_lines, histfile);
+#else
+ (void) write_history (histfile);
+#endif
+ clear_history ();
}
#endif
}
+#ifdef HAVE_LIBREADLINE
static void
add_history_line (const char *line)
{
-#ifdef HAVE_LIBREADLINE
add_history (line);
nr_history_lines++;
-#endif
}
+#endif
int
xwrite (int fd, const void *v_buf, size_t len)
return ret;
}
+
+/* Resolve the special FileIn paths ("-" or "-<<END" or filename).
+ * The caller (cmds.c) will call free_file_in after the command has
+ * run which should clean up resources.
+ */
+static char *file_in_heredoc (const char *endmarker);
+static char *file_in_tmpfile = NULL;
+
+char *
+file_in (const char *arg)
+{
+ char *ret;
+
+ if (STREQ (arg, "-")) {
+ ret = strdup ("/dev/stdin");
+ if (!ret) {
+ perror ("strdup");
+ return NULL;
+ }
+ }
+ else if (STRPREFIX (arg, "-<<")) {
+ const char *endmarker = &arg[3];
+ if (*endmarker == '\0') {
+ fprintf (stderr, "%s: missing end marker in -<< expression\n",
+ program_name);
+ return NULL;
+ }
+ ret = file_in_heredoc (endmarker);
+ if (ret == NULL)
+ return NULL;
+ }
+ else {
+ ret = strdup (arg);
+ if (!ret) {
+ perror ("strdup");
+ return NULL;
+ }
+ }
+
+ return ret;
+}
+
+static char *
+file_in_heredoc (const char *endmarker)
+{
+ TMP_TEMPLATE_ON_STACK (template);
+ file_in_tmpfile = strdup (template);
+ if (file_in_tmpfile == NULL) {
+ perror ("strdup");
+ return NULL;
+ }
+
+ int fd = mkstemp (file_in_tmpfile);
+ if (fd == -1) {
+ perror ("mkstemp");
+ goto error1;
+ }
+
+ size_t markerlen = strlen (endmarker);
+
+ char buffer[BUFSIZ];
+ int write_error = 0;
+ while (fgets (buffer, sizeof buffer, stdin) != NULL) {
+ /* Look for "END"<EOF> or "END\n" in input. */
+ size_t blen = strlen (buffer);
+ if (STREQLEN (buffer, endmarker, markerlen) &&
+ (blen == markerlen ||
+ (blen == markerlen+1 && buffer[markerlen] == '\n')))
+ goto found_end;
+
+ if (xwrite (fd, buffer, blen) == -1) {
+ if (!write_error) perror ("write");
+ write_error = 1;
+ /* continue reading up to the end marker */
+ }
+ }
+
+ /* Reached EOF of stdin without finding the end marker, which
+ * is likely to be an error.
+ */
+ fprintf (stderr, "%s: end of input reached without finding '%s'\n",
+ program_name, endmarker);
+ goto error2;
+
+ found_end:
+ if (write_error) {
+ close (fd);
+ goto error2;
+ }
+
+ if (close (fd) == -1) {
+ perror ("close");
+ goto error2;
+ }
+
+ return file_in_tmpfile;
+
+ error2:
+ unlink (file_in_tmpfile);
+
+ error1:
+ free (file_in_tmpfile);
+ file_in_tmpfile = NULL;
+ return NULL;
+}
+
+void
+free_file_in (char *s)
+{
+ if (file_in_tmpfile) {
+ if (unlink (file_in_tmpfile) == -1)
+ perror (file_in_tmpfile);
+ file_in_tmpfile = NULL;
+ }
+
+ /* Free the device or file name which was strdup'd in file_in().
+ * Note it's not immediately clear, but for -<< heredocs,
+ * s == file_in_tmpfile, so this frees up that buffer.
+ */
+ free (s);
+}
+
+/* Resolve the special FileOut paths ("-" or filename).
+ * The caller (cmds.c) will call free (str) after the command has run.
+ */
+char *
+file_out (const char *arg)
+{
+ char *ret;
+
+ if (STREQ (arg, "-"))
+ ret = strdup ("/dev/stdout");
+ else
+ ret = strdup (arg);
+
+ if (!ret) {
+ perror ("strdup");
+ return NULL;
+ }
+ return ret;
+}
git.annexia.org / libguestfs.git / blobdiff