/* 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 <config.h>
-#define _GNU_SOURCE // for strchrnul
-
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <signal.h>
#include <assert.h>
-#include <ctype.h>
#include <sys/types.h>
#include <sys/wait.h>
+#include <locale.h>
#ifdef HAVE_LIBREADLINE
#include <readline/readline.h>
#include <guestfs.h>
#include "fish.h"
+#include "c-ctype.h"
+#include "closeout.h"
#include "progname.h"
+struct drv {
+ struct drv *next;
+ char *filename; /* disk filename (for -a or -N options) */
+ prep_data *data; /* prepared type (for -N option only) */
+ char *device; /* device inside the appliance */
+};
+
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 prepare_drives (struct drv *drv);
static void mount_mps (struct mp *mp);
+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 void print_shell_quote (FILE *stream, const char *str);
/* 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 = 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;
- if (guestfs_wait_ready (g) == -1)
- return -1;
- }
- return 0;
-}
+int command_num = 0;
static void __attribute__((noreturn))
usage (int status)
" --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"
" --remote[=pid] Send commands to remote %s\n"
" -r|--ro Mount read-only\n"
" --selinux Enable SELinux support\n"
/* Set global program name that is not polluted with libtool artifacts. */
set_program_name (argv[0]);
+ atexit (close_stdout);
+
+ setlocale (LC_ALL, "");
+ bindtextdomain (PACKAGE, LOCALEBASEDIR);
+ textdomain (PACKAGE);
+
enum { HELP_OPTION = CHAR_MAX + 1 };
- static const char *options = "a:Df:h::im:nrv?Vx";
+ static const char *options = "a:Df:h::im:nN:rv?Vx";
static const struct option long_options[] = {
{ "add", 1, 0, 'a' },
{ "cmd-help", 2, 0, 'h' },
{ "inspector", 0, 0, 'i' },
{ "listen", 0, 0, 0 },
{ "mount", 1, 0, 'm' },
+ { "new", 1, 0, 'N' },
{ "no-dest-paths", 0, 0, 'D' },
{ "no-sync", 0, 0, 'n' },
{ "remote", 2, 0, 0 },
int inspector = 0;
int option_index;
struct sigaction sa;
+ char next_drive = 'a';
+ int next_prepared_drive = 1;
initialize_readline ();
g = guestfs_create ();
if (g == NULL) {
fprintf (stderr, _("guestfs_create: failed to create handle\n"));
- exit (1);
+ exit (EXIT_FAILURE);
}
guestfs_set_autosync (g, 1);
switch (c) {
case 0: /* options which are long only */
- if (strcmp (long_options[option_index].name, "listen") == 0)
+ if (STREQ (long_options[option_index].name, "listen"))
remote_control_listen = 1;
- else if (strcmp (long_options[option_index].name, "remote") == 0) {
+ else if (STREQ (long_options[option_index].name, "remote")) {
if (optarg) {
if (sscanf (optarg, "%d", &remote_control) != 1) {
fprintf (stderr, _("%s: --listen=PID: PID was not a number: %s\n"),
program_name, optarg);
- exit (1);
+ exit (EXIT_FAILURE);
}
} else {
p = getenv ("GUESTFISH_PID");
fprintf (stderr, _("%s: remote: $GUESTFISH_PID must be set"
" to the PID of the remote process\n"),
program_name);
- exit (1);
+ exit (EXIT_FAILURE);
}
}
- } else if (strcmp (long_options[option_index].name, "selinux") == 0) {
+ } else if (STREQ (long_options[option_index].name, "selinux")) {
guestfs_set_selinux (g, 1);
} else {
fprintf (stderr, _("%s: unknown long option: %s (%d)\n"),
program_name, long_options[option_index].name, option_index);
- exit (1);
+ exit (EXIT_FAILURE);
}
break;
case 'a':
if (access (optarg, R_OK) != 0) {
perror (optarg);
- exit (1);
+ exit (EXIT_FAILURE);
}
drv = malloc (sizeof (struct drv));
if (!drv) {
perror ("malloc");
- exit (1);
+ exit (EXIT_FAILURE);
}
drv->filename = optarg;
+ drv->data = NULL;
+ /* We could fill the device field in, but in fact we
+ * only use it for the -N option at present.
+ */
+ drv->device = NULL;
+ drv->next = drvs;
+ drvs = drv;
+ next_drive++;
+ break;
+
+ case 'N':
+ if (STRCASEEQ (optarg, "list")) {
+ list_prepared_drives ();
+ exit (EXIT_SUCCESS);
+ }
+ drv = malloc (sizeof (struct drv));
+ if (!drv) {
+ perror ("malloc");
+ exit (EXIT_FAILURE);
+ }
+ if (asprintf (&drv->filename, "test%d.img",
+ next_prepared_drive++) == -1) {
+ perror ("asprintf");
+ exit (EXIT_FAILURE);
+ }
+ drv->data = create_prepared_file (optarg, drv->filename);
+ if (asprintf (&drv->device, "/dev/sd%c", next_drive++) == -1) {
+ perror ("asprintf");
+ exit (EXIT_FAILURE);
+ }
drv->next = drvs;
drvs = drv;
break;
if (file) {
fprintf (stderr, _("%s: only one -f parameter can be given\n"),
program_name);
- exit (1);
+ exit (EXIT_FAILURE);
}
file = optarg;
break;
display_command (argv[optind++]);
else
list_commands ();
- exit (0);
+ exit (EXIT_SUCCESS);
case 'i':
inspector = 1;
mp = malloc (sizeof (struct mp));
if (!mp) {
perror ("malloc");
- exit (1);
+ exit (EXIT_FAILURE);
}
p = strchr (optarg, ':');
if (p) {
case 'V':
printf ("%s %s\n", program_name, PACKAGE_VERSION);
- exit (0);
+ exit (EXIT_SUCCESS);
case 'x':
- echo_commands = 1;
+ guestfs_set_trace (g, 1);
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"),
+ fprintf (stderr, _("%s: cannot use -i option with -a, -m, -N, "
+ "--listen, --remote or --selinux\n"),
program_name);
- exit (1);
+ 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 (1);
+ exit (EXIT_FAILURE);
+ }
+
+ char *cmd;
+ size_t cmdlen;
+ FILE *fp = open_memstream (&cmd, &cmdlen);
+ if (fp == NULL) {
+ perror ("open_memstream");
+ exit (EXIT_FAILURE);
}
- strcpy (cmd, "a=`virt-inspector");
+ fprintf (fp, "virt-inspector");
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 (1);
- }
- strcat (cmd, " '");
- strcat (cmd, argv[optind]);
- strcat (cmd, "'");
+ fputc (' ', fp);
+ print_shell_quote (fp, argv[optind]);
optind++;
}
if (read_only)
- strcat (cmd, " --ro-fish");
+ fprintf (fp, " --ro-fish");
else
- strcat (cmd, " --fish");
+ fprintf (fp, " --fish");
- sprintf (&cmd[strlen(cmd)], "` && %s $a", real_argv0);
+ if (fclose (fp) == -1) {
+ perror ("fclose");
+ exit (EXIT_FAILURE);
+ }
+
+ if (verbose)
+ fprintf (stderr,
+ "%s -i: running: %s\n", program_name, cmd);
+
+ FILE *pp = popen (cmd, "r");
+ if (pp == NULL) {
+ perror (cmd);
+ exit (EXIT_FAILURE);
+ }
+
+ char *cmd2;
+ fp = open_memstream (&cmd2, &cmdlen);
+ if (fp == NULL) {
+ perror ("open_memstream");
+ exit (EXIT_FAILURE);
+ }
+
+ fprintf (fp, "%s", real_argv0);
if (guestfs_get_verbose (g))
- strcat (cmd, " -v");
+ fprintf (fp, " -v");
if (!guestfs_get_autosync (g))
- strcat (cmd, " -n");
+ fprintf (fp, " -n");
+ if (guestfs_get_trace (g))
+ fprintf (fp, " -x");
+
+ char *insp = NULL;
+ size_t insplen;
+ if (getline (&insp, &insplen, pp) == -1) {
+ perror (cmd);
+ exit (EXIT_FAILURE);
+ }
+ fprintf (fp, " %s", insp);
+
+ if (pclose (pp) == -1) {
+ perror (cmd);
+ exit (EXIT_FAILURE);
+ }
+
+ if (fclose (fp) == -1) {
+ perror ("fclose");
+ exit (EXIT_FAILURE);
+ }
if (verbose)
fprintf (stderr,
- "%s -i: running virt-inspector command:\n%s\n", program_name, cmd);
+ "%s -i: running: %s\n", program_name, cmd2);
- r = system (cmd);
+ int r = system (cmd2);
if (r == -1) {
- perror ("system");
- exit (1);
+ perror (cmd2);
+ exit (EXIT_FAILURE);
}
+
+ free (cmd);
+ free (cmd2);
+ free (insp);
+
exit (WEXITSTATUS (r));
}
/* If we've got drives to add, add them now. */
add_drives (drvs);
- /* If we've got mountpoints, we must launch the guest and mount them. */
- if (mps != NULL) {
- if (launch (g) == -1) exit (1);
+ /* If we've got mountpoints or prepared drives, we must launch the
+ * guest and mount them.
+ */
+ if (next_prepared_drive > 1 || mps != NULL) {
+ if (launch () == -1) exit (EXIT_FAILURE);
+ prepare_drives (drvs);
mount_mps (mps);
}
fprintf (stderr,
_("%s: cannot use --listen and --remote options at the same time\n"),
program_name);
- exit (1);
+ exit (EXIT_FAILURE);
}
if (remote_control_listen) {
fprintf (stderr,
_("%s: extra parameters on the command line with --listen flag\n"),
program_name);
- exit (1);
+ exit (EXIT_FAILURE);
}
if (file) {
fprintf (stderr,
_("%s: cannot use --listen and --file options at the same time\n"),
program_name);
- exit (1);
+ exit (EXIT_FAILURE);
}
rc_listen ();
}
close (0);
if (open (file, O_RDONLY) == -1) {
perror (file);
- exit (1);
+ exit (EXIT_FAILURE);
}
}
cleanup_readline ();
- exit (0);
+ exit (EXIT_SUCCESS);
}
void
printf ("%s - %s\n\n%s\n", name, shortdesc, str);
return;
}
- fprintf (fp, "=head1 %s - %s\n\n", name, shortdesc);
+ fprintf (fp, "=head1 NAME\n\n%s - %s\n\n", name, shortdesc);
fputs (str, fp);
pclose (fp);
}
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);
+
+ /* Don't use guestfs_mount here because that will default to mount
+ * options -o sync,noatime. For more information, see guestfs(3)
+ * section "LIBGUESTFS GOTCHAS".
+ */
+ const char *options = read_only ? "ro" : "";
+ r = guestfs_mount_options (g, options, mp->device, mp->mountpoint);
if (r == -1)
- exit (1);
+ exit (EXIT_FAILURE);
}
}
if (drv) {
add_drives (drv->next);
- if (!read_only)
+
+ if (drv->data /* -N option is not affected by --ro */ || !read_only)
r = guestfs_add_drive (g, drv->filename);
else
r = guestfs_add_drive_ro (g, drv->filename);
if (r == -1)
- exit (1);
+ exit (EXIT_FAILURE);
+ }
+}
+
+static void
+prepare_drives (struct drv *drv)
+{
+ if (drv) {
+ prepare_drives (drv->next);
+ if (drv->data)
+ prepare_drive (drv->filename, drv->data, drv->device);
+ }
+}
+
+static int
+launch (void)
+{
+ if (guestfs_is_config (g)) {
+ if (guestfs_launch (g) == -1)
+ return -1;
}
+ return 0;
}
static void
"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 a list of commands\n"
+ " 'man' to read the manual\n"
" 'quit' to quit the shell\n"
"\n"));
/* Skip any initial whitespace before the command. */
again:
- while (*buf && isspace (*buf))
+ while (*buf && c_isspace (*buf))
buf++;
if (!*buf) continue;
(WIFSIGNALED (r) &&
(WTERMSIG (r) == SIGINT || WTERMSIG (r) == SIGQUIT)) ||
WEXITSTATUS (r) != 0)
- exit (1);
+ exit (EXIT_FAILURE);
}
continue;
}
len = strcspn (p, "\"");
if (p[len] == '\0') {
fprintf (stderr, _("%s: unterminated double quote\n"), program_name);
- if (exit_on_error) exit (1);
+ if (exit_on_error) exit (EXIT_FAILURE);
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);
+ if (exit_on_error) exit (EXIT_FAILURE);
goto next_command;
}
p[len] = '\0';
len = strcspn (p, "'");
if (p[len] == '\0') {
fprintf (stderr, _("%s: unterminated single quote\n"), program_name);
- if (exit_on_error) exit (1);
+ if (exit_on_error) exit (EXIT_FAILURE);
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);
+ if (exit_on_error) exit (EXIT_FAILURE);
goto next_command;
}
p[len] = '\0';
if (c != 0) {
fprintf (stderr,
_("%s: unterminated \"[...]\" sequence\n"), program_name);
- if (exit_on_error) exit (1);
+ if (exit_on_error) exit (EXIT_FAILURE);
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);
+ if (exit_on_error) exit (EXIT_FAILURE);
goto next_command;
}
*(pend-1) = '\0';
if (i == sizeof argv / sizeof argv[0]) {
fprintf (stderr, _("%s: too many arguments\n"), program_name);
- if (exit_on_error) exit (1);
+ if (exit_on_error) exit (EXIT_FAILURE);
goto next_command;
}
got_command:
if (issue_command (cmd, argv, pipe) == -1) {
- if (exit_on_error) exit (1);
+ if (exit_on_error) exit (EXIT_FAILURE);
}
next_command:;
if (optind >= argc) return;
cmd = argv[optind++];
- if (strcmp (cmd, ":") == 0) {
+ if (STREQ (cmd, ":")) {
fprintf (stderr, _("%s: empty command on command line\n"), program_name);
- exit (1);
+ 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 ":" ... */
- while (optind < argc && strcmp (argv[optind], ":") != 0)
+ while (optind < argc && STRNEQ (argv[optind], ":"))
optind++;
if (optind == argc) {
- if (issue_command (cmd, params, NULL) == -1) exit (1);
+ 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 (1);
+ 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");
- }
+ /* This counts the commands issued, starting at 1. */
+ command_num++;
/* For | ... commands. Annoyingly we can't use popen(3) here. */
if (pipecmd) {
r = rc_remote (remote_control, cmd, argc, argv, exit_on_error);
/* Otherwise execute it locally. */
- else if (strcasecmp (cmd, "help") == 0) {
+ else if (STRCASEEQ (cmd, "help")) {
if (argc == 0)
list_commands ();
else
display_command (argv[0]);
r = 0;
}
- else if (strcasecmp (cmd, "quit") == 0 ||
- strcasecmp (cmd, "exit") == 0 ||
- strcasecmp (cmd, "q") == 0) {
+ else if (STRCASEEQ (cmd, "quit") ||
+ STRCASEEQ (cmd, "exit") ||
+ STRCASEEQ (cmd, "q")) {
quit = 1;
r = 0;
}
- else if (strcasecmp (cmd, "alloc") == 0 ||
- strcasecmp (cmd, "allocate") == 0)
+ else if (STRCASEEQ (cmd, "alloc") ||
+ STRCASEEQ (cmd, "allocate"))
r = do_alloc (cmd, argc, argv);
- else if (strcasecmp (cmd, "echo") == 0)
+ else if (STRCASEEQ (cmd, "echo"))
r = do_echo (cmd, argc, argv);
- else if (strcasecmp (cmd, "edit") == 0 ||
- strcasecmp (cmd, "vi") == 0 ||
- strcasecmp (cmd, "emacs") == 0)
+ else if (STRCASEEQ (cmd, "edit") ||
+ STRCASEEQ (cmd, "vi") ||
+ STRCASEEQ (cmd, "emacs"))
r = do_edit (cmd, argc, argv);
- else if (strcasecmp (cmd, "lcd") == 0)
+ else if (STRCASEEQ (cmd, "lcd"))
r = do_lcd (cmd, argc, argv);
- else if (strcasecmp (cmd, "glob") == 0)
+ else if (STRCASEEQ (cmd, "glob"))
r = do_glob (cmd, argc, argv);
- else if (strcasecmp (cmd, "more") == 0 ||
- strcasecmp (cmd, "less") == 0)
+ else if (STRCASEEQ (cmd, "man") ||
+ STRCASEEQ (cmd, "manual"))
+ r = do_man (cmd, argc, argv);
+ else if (STRCASEEQ (cmd, "more") ||
+ STRCASEEQ (cmd, "less"))
r = do_more (cmd, argc, argv);
- else if (strcasecmp (cmd, "reopen") == 0)
+ else if (STRCASEEQ (cmd, "reopen"))
r = do_reopen (cmd, argc, argv);
- else if (strcasecmp (cmd, "time") == 0)
+ 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);
void
list_builtin_commands (void)
{
- /* help and quit should appear at the top */
+ /* help, man 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",
+ "man", _("read the manual"));
+ printf ("%-20s %s\n",
"quit", _("quit guestfish"));
printf ("%-20s %s\n",
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) */
{
/* help for actions is auto-generated, see display_command */
- if (strcasecmp (cmd, "alloc") == 0 ||
- strcasecmp (cmd, "allocate") == 0)
+ if (STRCASEEQ (cmd, "alloc") ||
+ STRCASEEQ (cmd, "allocate"))
printf (_("alloc - allocate an image\n"
" alloc <filename> <size>\n"
"\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 (strcasecmp (cmd, "echo") == 0)
+ 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 (strcasecmp (cmd, "edit") == 0 ||
- strcasecmp (cmd, "vi") == 0 ||
- strcasecmp (cmd, "emacs") == 0)
+ 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"
+ " running \"cat\", editing locally, and then \"write\".\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 (strcasecmp (cmd, "lcd") == 0)
+ 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 (strcasecmp (cmd, "glob") == 0)
+ 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 (strcasecmp (cmd, "help") == 0)
+ else if (STRCASEEQ (cmd, "man") ||
+ STRCASEEQ (cmd, "manual"))
+ printf (_("man - read the manual\n"
+ " man\n"
+ "\n"
+ " Opens the manual page for guestfish.\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 (strcasecmp (cmd, "more") == 0 ||
- strcasecmp (cmd, "less") == 0)
+ else if (STRCASEEQ (cmd, "more") ||
+ STRCASEEQ (cmd, "less"))
printf (_("more - view a file in the pager\n"
" more <filename>\n"
"\n"
"\n"
" NOTE: This will not work reliably for large files\n"
" (> 2 MB) or binary files containing \\0 bytes.\n"));
- else if (strcasecmp (cmd, "quit") == 0 ||
- strcasecmp (cmd, "exit") == 0 ||
- strcasecmp (cmd, "q") == 0)
+ else if (STRCASEEQ (cmd, "quit") ||
+ STRCASEEQ (cmd, "exit") ||
+ STRCASEEQ (cmd, "q"))
printf (_("quit - quit guestfish\n"
" quit\n"));
- else if (strcasecmp (cmd, "reopen") == 0)
+ 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 (strcasecmp (cmd, "time") == 0)
+ 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"
cmd);
}
+/* 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
free_strings (char **argv)
{
is_true (const char *str)
{
return
- strcasecmp (str, "0") != 0 &&
- strcasecmp (str, "f") != 0 &&
- strcasecmp (str, "false") != 0 &&
- strcasecmp (str, "n") != 0 &&
- strcasecmp (str, "no") != 0;
+ 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);
}
-/* XXX We could improve list parsing. */
char **
parse_string_list (const char *str)
{
- char **argv;
- const char *p, *pend;
- int argc, i;
+ 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;
- argc = 1;
- for (i = 0; str[i]; ++i)
- if (str[i] == ' ') argc++;
+ /* Skip leading whitespace */
+ p += strspn (p, " \t");
- argv = malloc (sizeof (char *) * (argc+1));
- if (argv == NULL) { perror ("malloc"); exit (1); }
+ char in_quote = 0;
- p = str;
- i = 0;
- while (*p) {
- pend = strchrnul (p, ' ');
- argv[i] = strndup (p, pend-p);
- i++;
- p = *pend == ' ' ? pend+1 : pend;
+ /* 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 (EXIT_FAILURE);
+ }
+ 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 (EXIT_FAILURE);
+ }
+ 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 (EXIT_FAILURE);
}
- argv[i] = NULL;
+ argv = argv_new;
+
+ argv[argv_len-1] = NULL;
return argv;
}
}
close (fd);
+#ifdef HAVE_APPEND_HISTORY
(void) append_history (nr_history_lines, histfile);
+#else
+ (void) write_history (histfile);
+#endif
}
#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 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 (STRCASEEQLEN (path, "c:", 2))
+ 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;
+}
+
+/* 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)
+{
+ static const char template[] = "/tmp/heredocXXXXXX";
+ 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;
+}
+
+static void
+print_shell_quote (FILE *stream, const char *str)
+{
+#define SAFE(c) (c_isalnum((c)) || \
+ (c) == '/' || (c) == '-' || (c) == '_' || (c) == '.')
+ int i;
+
+ for (i = 0; str[i]; ++i) {
+ if (!SAFE(str[i]))
+ putc ('\\', stream);
+ putc (str[i], stream);
+ }
+}
git.annexia.org / libguestfs.git / blobdiff