Create separate toplevel directories for hivexsh and hivexml.

1 files changed, 1094 insertions, 0 deletions

diff --git a/sh/hivexsh.c b/sh/hivexsh.c
new file mode 100644
index 0000000..332b773
--- /dev/null
+++ b/sh/hivexsh.c
@@ -0,0 +1,1094 @@
+/* hivexsh - Hive shell.
+ * Copyright (C) 2009 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <assert.h>
+#include <errno.h>
+
+#ifdef HAVE_LIBREADLINE
+#include <readline/readline.h>
+#include <readline/history.h>
+#endif
+
+#ifdef HAVE_GETTEXT
+#include "gettext.h"
+#define _(str) dgettext(PACKAGE, (str))
+//#define N_(str) dgettext(PACKAGE, (str))
+#else
+#define _(str) str
+//#define N_(str) str
+#endif
+
+#define STREQ(a,b) (strcmp((a),(b)) == 0)
+#define STRCASEEQ(a,b) (strcasecmp((a),(b)) == 0)
+#define STRNEQ(a,b) (strcmp((a),(b)) != 0)
+//#define STRCASENEQ(a,b) (strcasecmp((a),(b)) != 0)
+//#define STREQLEN(a,b,n) (strncmp((a),(b),(n)) == 0)
+//#define STRCASEEQLEN(a,b,n) (strncasecmp((a),(b),(n)) == 0)
+//#define STRNEQLEN(a,b,n) (strncmp((a),(b),(n)) != 0)
+//#define STRCASENEQLEN(a,b,n) (strncasecmp((a),(b),(n)) != 0)
+#define STRPREFIX(a,b) (strncmp((a),(b),strlen((b))) == 0)
+
+#include "c-ctype.h"
+#include "xstrtol.h"
+
+#include "hivex.h"
+#include "byte_conversions.h"
+
+#define HIVEX_MAX_VALUES         1000
+
+static int quit = 0;
+static int is_tty;
+static hive_h *h = NULL;
+static char *prompt_string = NULL; /* Normal prompt string. */
+static char *loaded = NULL;     /* Basename of loaded file, if any. */
+static hive_node_h cwd;         /* Current node. */
+static int open_flags = 0;      /* Flags used when loading a hive file. */
+
+static void usage (void) __attribute__((noreturn));
+static void print_node_path (hive_node_h, FILE *);
+static void set_prompt_string (void);
+static void initialize_readline (void);
+static void cleanup_readline (void);
+static void add_history_line (const char *);
+static char *rl_gets (const char *prompt_string);
+static void sort_strings (char **strings, int len);
+static int get_xdigit (char c);
+static int dispatch (char *cmd, char *args);
+static int cmd_add (char *name);
+static int cmd_cd (char *path);
+static int cmd_close (char *path);
+static int cmd_commit (char *path);
+static int cmd_del (char *args);
+static int cmd_help (char *args);
+static int cmd_load (char *hivefile);
+static int cmd_ls (char *args);
+static int cmd_lsval (char *args);
+static int cmd_setval (char *args);
+
+static void
+usage (void)
+{
+  fprintf (stderr, "hivexsh [-dfw] [hivefile]\n");
+  exit (EXIT_FAILURE);
+}
+
+int
+main (int argc, char *argv[])
+{
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEBASEDIR);
+  textdomain (PACKAGE);
+
+  int c;
+  const char *filename = NULL;
+
+  set_prompt_string ();
+
+  while ((c = getopt (argc, argv, "dfw")) != EOF) {
+    switch (c) {
+    case 'd':
+      open_flags |= HIVEX_OPEN_DEBUG;
+      break;
+    case 'f':
+      filename = optarg;
+      break;
+    case 'w':
+      open_flags |= HIVEX_OPEN_WRITE;
+      break;
+    default:
+      usage ();
+    }
+  }
+
+  if (optind < argc) {
+    if (optind + 1 != argc)
+      usage ();
+    if (cmd_load (argv[optind]) == -1)
+      exit (EXIT_FAILURE);
+  }
+
+  /* -f filename parameter */
+  if (filename) {
+    close (0);
+    if (open (filename, O_RDONLY) == -1) {
+      perror (filename);
+      exit (EXIT_FAILURE);
+    }
+  }
+
+  /* Main loop. */
+  is_tty = isatty (0);
+  initialize_readline ();
+
+  if (is_tty)
+    printf (_(
+"\n"
+"Welcome to hivexsh, the hivex interactive shell for examining\n"
+"Windows Registry binary hive files.\n"
+"\n"
+"Type: 'help' for help summary\n"
+"      'quit' to quit the shell\n"
+"\n"));
+
+  while (!quit) {
+    char *buf = rl_gets (prompt_string);
+    if (!buf) {
+      quit = 1;
+      if (is_tty)
+        printf ("\n");
+      break;
+    }
+
+    while (*buf && c_isspace (*buf))
+      buf++;
+
+    /* Ignore blank line. */
+    if (!*buf) continue;
+
+    /* If the next character is '#' then this is a comment. */
+    if (*buf == '#') continue;
+
+    /* Parsing is very simple - much simpler than guestfish.  This is
+     * because Registry keys often contain spaces, and we don't want
+     * to bother with quoting.  Therefore here we just split at the
+     * first whitespace into "cmd<whitespace>arg(s)".  We let the
+     * command decide how to deal with arg(s), if at all.
+     */
+    size_t len = strcspn (buf, " \t");
+
+    if (len == 0) continue;
+
+    char *cmd = buf;
+    char *args;
+
+    if (buf[len] == '\0') {
+      /* This is mostly safe.  Although the cmd_* functions do sometimes
+       * modify args, then shouldn't do so when args is "".
+       */
+      args = (char *) "";
+      goto got_command;
+    }
+
+    buf[len] = '\0';
+    args = buf + len + 1 + strspn (&buf[len+1], " \t");
+
+    len = strlen (args);
+    while (len > 0 && c_isspace (args[len-1])) {
+      args[len-1] = '\0';
+      len--;
+    }
+
+  got_command:
+    /*printf ("command: '%s'  args: '%s'\n", cmd, args)*/;
+    int r = dispatch (cmd, args);
+    if (!is_tty && r == -1)
+      exit (EXIT_FAILURE);
+  }
+
+  cleanup_readline ();
+  free (prompt_string);
+  free (loaded);
+  if (h) hivex_close (h);
+  exit (0);
+}
+
+/* Set the prompt string.  This is called whenever it could change, eg.
+ * after loading a file or changing directory.
+ */
+static void
+set_prompt_string (void)
+{
+  free (prompt_string);
+  prompt_string = NULL;
+
+  FILE *fp;
+  char *ptr;
+  size_t size;
+  fp = open_memstream (&ptr, &size);
+  if (fp == NULL) {
+    perror ("open_memstream");
+    exit (EXIT_FAILURE);
+  }
+
+  if (h) {
+    assert (loaded != NULL);
+    assert (cwd != 0);
+
+    fputs (loaded, fp);
+    print_node_path (cwd, fp);
+  }
+
+  fprintf (fp, "> ");
+  fclose (fp);
+  prompt_string = ptr;
+}
+
+/* Print the \full\path of a node. */
+static void
+print_node_path (hive_node_h node, FILE *fp)
+{
+  hive_node_h root = hivex_root (h);
+
+  if (node == root) {
+    fputc ('\\', fp);
+    return;
+  }
+
+  hive_node_h parent = hivex_node_parent (h, node);
+  if (parent == 0) {
+    fprintf (stderr, _("hivexsh: error getting parent of node %zu\n"), node);
+    return;
+  }
+  print_node_path (parent, fp);
+
+  if (parent != root)
+    fputc ('\\', fp);
+
+  char *name = hivex_node_name (h, node);
+  if (name == NULL) {
+    fprintf (stderr, _("hivexsh: error getting node name of node %zx\n"), node);
+    return;
+  }
+
+  fputs (name, fp);
+  free (name);
+}
+
+static char *line_read = NULL;
+
+static char *
+rl_gets (const char *prompt_string)
+{
+#ifdef HAVE_LIBREADLINE
+
+  if (is_tty) {
+    if (line_read) {
+      free (line_read);
+      line_read = NULL;
+    }
+
+    line_read = readline (prompt_string);
+
+    if (line_read && *line_read)
+      add_history_line (line_read);
+
+    return line_read;
+  }
+
+#endif /* HAVE_LIBREADLINE */
+
+  static char buf[8192];
+  int len;
+
+  if (is_tty)
+    printf ("%s", prompt_string);
+  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;
+}
+
+#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/.hivexsh", home);
+    using_history ();
+    (void) read_history (histfile);
+  }
+
+  rl_readline_name = "hivexsh";
+#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
+}
+
+static int
+compare (const void *vp1, const void *vp2)
+{
+  char * const *p1 = (char * const *) vp1;
+  char * const *p2 = (char * const *) vp2;
+  return strcasecmp (*p1, *p2);
+}
+
+static void
+sort_strings (char **strings, int len)
+{
+  qsort (strings, len, sizeof (char *), compare);
+}
+
+static int
+get_xdigit (char c)
+{
+  switch (c) {
+  case '0'...'9': return c - '0';
+  case 'a'...'f': return c - 'a' + 10;
+  case 'A'...'F': return c - 'A' + 10;
+  default: return -1;
+  }
+}
+
+static int
+dispatch (char *cmd, char *args)
+{
+  if (STRCASEEQ (cmd, "help"))
+    return cmd_help (args);
+  else if (STRCASEEQ (cmd, "load"))
+    return cmd_load (args);
+  else if (STRCASEEQ (cmd, "exit") ||
+           STRCASEEQ (cmd, "q") ||
+           STRCASEEQ (cmd, "quit")) {
+    quit = 1;
+    return 0;
+  }
+
+  /* If no hive file is loaded (!h) then only the small selection of
+   * commands above will work.
+   */
+  if (!h) {
+    fprintf (stderr, _("hivexsh: you must load a hive file first using 'load hivefile'\n"));
+    return -1;
+  }
+
+  if (STRCASEEQ (cmd, "add"))
+    return cmd_add (args);
+  else if (STRCASEEQ (cmd, "cd"))
+    return cmd_cd (args);
+  else if (STRCASEEQ (cmd, "close") || STRCASEEQ (cmd, "unload"))
+    return cmd_close (args);
+  else if (STRCASEEQ (cmd, "commit"))
+    return cmd_commit (args);
+  else if (STRCASEEQ (cmd, "del"))
+    return cmd_del (args);
+  else if (STRCASEEQ (cmd, "ls"))
+    return cmd_ls (args);
+  else if (STRCASEEQ (cmd, "lsval"))
+    return cmd_lsval (args);
+  else if (STRCASEEQ (cmd, "setval"))
+    return cmd_setval (args);
+  else {
+    fprintf (stderr, _("hivexsh: unknown command '%s', use 'help' for help summary\n"),
+             cmd);
+    return -1;
+  }
+}
+
+static int
+cmd_load (char *hivefile)
+{
+  if (STREQ (hivefile, "")) {
+    fprintf (stderr, _("hivexsh: load: no hive file name given to load\n"));
+    return -1;
+  }
+
+  if (h) hivex_close (h);
+  h = NULL;
+
+  free (loaded);
+  loaded = NULL;
+
+  cwd = 0;
+
+  h = hivex_open (hivefile, open_flags);
+  if (h == NULL) {
+    fprintf (stderr,
+             _(
+"hivexsh: failed to open hive file: %s: %m\n"
+"\n"
+"If you think this file is a valid Windows binary hive file (_not_\n"
+"a regedit *.reg file) then please run this command again using the\n"
+"hivexsh option '-d' and attach the complete output _and_ the hive file\n"
+"which fails into a bug report at https://bugzilla.redhat.com/\n"
+"\n"),
+             hivefile);
+    return -1;
+  }
+
+  /* Get the basename of the file for the prompt. */
+  char *p = strrchr (hivefile, '/');
+  if (p)
+    loaded = strdup (p+1);
+  else
+    loaded = strdup (hivefile);
+  if (!loaded) {
+    perror ("strdup");
+    exit (EXIT_FAILURE);
+  }
+
+  cwd = hivex_root (h);
+
+  set_prompt_string ();
+
+  return 0;
+}
+
+static int
+cmd_close (char *args)
+{
+  if (STRNEQ (args, "")) {
+    fprintf (stderr, _("hivexsh: '%s' command should not be given arguments\n"),
+             "close");
+    return -1;
+  }
+
+  if (h) hivex_close (h);
+  h = NULL;
+
+  free (loaded);
+  loaded = NULL;
+
+  cwd = 0;
+
+  set_prompt_string ();
+
+  return 0;
+}
+
+static int
+cmd_commit (char *path)
+{
+  if (STREQ (path, ""))
+    path = NULL;
+
+  if (hivex_commit (h, path, 0) == -1) {
+    perror ("hivexsh: commit");
+    return -1;
+  }
+
+  return 0;
+}
+
+static int
+cmd_cd (char *path)
+{
+  if (STREQ (path, "")) {
+    print_node_path (cwd, stdout);
+    fputc ('\n', stdout);
+    return 0;
+  }
+
+  if (path[0] == '\\' && path[1] == '\\') {
+    fprintf (stderr, _("%s: %s: \\ characters in path are doubled - are you escaping the path parameter correctly?\n"), "hivexsh", path);
+    return -1;
+  }
+
+  hive_node_h new_cwd = cwd;
+  hive_node_h root = hivex_root (h);
+
+  if (path[0] == '\\') {
+    new_cwd = root;
+    path++;
+  }
+
+  while (path[0]) {
+    size_t len = strcspn (path, "\\");
+    if (len == 0) {
+      path++;
+      continue;
+    }
+
+    char *elem = path;
+    path = path[len] == '\0' ? &path[len] : &path[len+1];
+    elem[len] = '\0';
+
+    if (len == 1 && STREQ (elem, "."))
+      continue;
+
+    if (len == 2 && STREQ (elem, "..")) {
+      if (new_cwd != root)
+        new_cwd = hivex_node_parent (h, new_cwd);
+      continue;
+    }
+
+    errno = 0;
+    new_cwd = hivex_node_get_child (h, new_cwd, elem);
+    if (new_cwd == 0) {
+      if (errno)
+        perror ("hivexsh: cd");
+      else
+        fprintf (stderr, _("hivexsh: cd: subkey '%s' not found\n"),
+                 elem);
+      return -1;
+    }
+  }
+
+  if (new_cwd != cwd) {
+    cwd = new_cwd;
+    set_prompt_string ();
+  }
+
+  return 0;
+}
+
+static int
+cmd_help (char *args)
+{
+  printf (_(
+"Navigate through the hive's keys using the 'cd' command, as if it\n"
+"contained a filesystem, and use 'ls' to list the subkeys of the\n"
+"current key.  Full documentation is in the hivexsh(1) manual page.\n"));
+
+  return 0;
+}
+
+static int
+cmd_ls (char *args)
+{
+  if (STRNEQ (args, "")) {
+    fprintf (stderr, _("hivexsh: '%s' command should not be given arguments\n"),
+             "ls");
+    return -1;
+  }
+
+  /* Get the subkeys. */
+  hive_node_h *children = hivex_node_children (h, cwd);
+  if (children == NULL) {
+    perror ("ls");
+    return -1;
+  }
+
+  /* Get names for each subkey. */
+  size_t len;
+  for (len = 0; children[len] != 0; ++len)
+    ;
+
+  char **names = calloc (len, sizeof (char *));
+  if (names == NULL) {
+    perror ("malloc");
+    exit (EXIT_FAILURE);
+  }
+
+  int ret = -1;
+  size_t i;
+  for (i = 0; i < len; ++i) {
+    names[i] = hivex_node_name (h, children[i]);
+    if (names[i] == NULL) {
+      perror ("hivex_node_name");
+      goto error;
+    }
+  }
+
+  /* Sort the names. */
+  sort_strings (names, len);
+
+  for (i = 0; i < len; ++i)
+    printf ("%s\n", names[i]);
+
+  ret = 0;
+ error:
+  free (children);
+  for (i = 0; i < len; ++i)
+    free (names[i]);
+  free (names);
+  return ret;
+}
+
+static int
+cmd_lsval (char *key)
+{
+  if (STRNEQ (key, "")) {
+    hive_value_h value;
+
+    errno = 0;
+    if (STREQ (key, "@"))       /* default key written as "@" */
+      value = hivex_node_get_value (h, cwd, "");
+    else
+      value = hivex_node_get_value (h, cwd, key);
+
+    if (value == 0) {
+      if (errno)
+        goto error;
+      /* else key not found */
+      fprintf (stderr, _("%s: %s: key not found\n"), "hivexsh", key);
+      return -1;
+    }
+
+    /* Print the value. */
+    hive_type t;
+    size_t len;
+    if (hivex_value_type (h, value, &t, &len) == -1)
+      goto error;
+
+    switch (t) {
+    case hive_t_string:
+    case hive_t_expand_string:
+    case hive_t_link: {
+      char *str = hivex_value_string (h, value);
+      if (!str)
+        goto error;
+
+      puts (str); /* note: this adds a single \n character */
+      free (str);
+      break;
+    }
+
+    case hive_t_dword:
+    case hive_t_dword_be: {
+      int32_t j = hivex_value_dword (h, value);
+      printf ("%" PRIi32 "\n", j);
+      break;
+    }
+
+    case hive_t_qword: {
+      int64_t j = hivex_value_qword (h, value);
+      printf ("%" PRIi64 "\n", j);
+      break;
+    }
+
+    case hive_t_multiple_strings: {
+      char **strs = hivex_value_multiple_strings (h, value);
+      if (!strs)
+        goto error;
+      size_t j;
+      for (j = 0; strs[j] != NULL; ++j) {
+        puts (strs[j]);
+        free (strs[j]);
+      }
+      free (strs);
+      break;
+    }
+
+    case hive_t_none:
+    case hive_t_binary:
+    case hive_t_resource_list:
+    case hive_t_full_resource_description:
+    case hive_t_resource_requirements_list:
+    default: {
+      char *data = hivex_value_value (h, value, &t, &len);
+      if (!data)
+        goto error;
+
+      if (fwrite (data, 1, len, stdout) != len)
+        goto error;
+
+      free (data);
+      break;
+    }
+    } /* switch */
+  } else {
+    /* No key specified, so print all keys in this node.  We do this
+     * in a format which looks like the output of regedit, although
+     * this isn't a particularly useful format.
+     */
+    hive_value_h *values;
+
+    values = hivex_node_values (h, cwd);
+    if (values == NULL)
+      goto error;
+
+    size_t i;
+    for (i = 0; values[i] != 0; ++i) {
+      char *key = hivex_value_key (h, values[i]);
+      if (!key) goto error;
+
+      if (*key) {
+        putchar ('"');
+        size_t j;
+        for (j = 0; key[j] != 0; ++j) {
+          if (key[j] == '"' || key[j] == '\\')
+            putchar ('\\');
+          putchar (key[j]);
+        }
+        putchar ('"');
+      } else
+        printf ("\"@\"");       /* default key in regedit files */
+      putchar ('=');
+      free (key);
+
+      hive_type t;
+      size_t len;
+      if (hivex_value_type (h, values[i], &t, &len) == -1)
+        goto error;
+
+      switch (t) {
+      case hive_t_string:
+      case hive_t_expand_string:
+      case hive_t_link: {
+        char *str = hivex_value_string (h, values[i]);
+        if (!str)
+          goto error;
+
+        if (t != hive_t_string)
+          printf ("str(%d):", t);
+        putchar ('"');
+        size_t j;
+        for (j = 0; str[j] != 0; ++j) {
+          if (str[j] == '"' || str[j] == '\\')
+            putchar ('\\');
+          putchar (str[j]);
+        }
+        putchar ('"');
+        free (str);
+        break;
+      }
+
+      case hive_t_dword:
+      case hive_t_dword_be: {
+        int32_t j = hivex_value_dword (h, values[i]);
+        printf ("dword:%08" PRIx32, j);
+        break;
+      }
+
+      case hive_t_qword: /* sic */
+      case hive_t_none:
+      case hive_t_binary:
+      case hive_t_multiple_strings:
+      case hive_t_resource_list:
+      case hive_t_full_resource_description:
+      case hive_t_resource_requirements_list:
+      default: {
+        unsigned char *data =
+          (unsigned char *) hivex_value_value (h, values[i], &t, &len);
+        if (!data)
+          goto error;
+
+        printf ("hex(%d):", t);
+        size_t j;
+        for (j = 0; j < len; ++j) {
+          if (j > 0)
+            putchar (',');
+          printf ("%02x", data[j]);
+        }
+        break;
+      }
+      } /* switch */
+
+      putchar ('\n');
+    } /* for */
+
+    free (values);
+  }
+
+  return 0;
+
+ error:
+  perror ("hivexsh: lsval");
+  return -1;
+}
+
+static int
+cmd_setval (char *nrvals_str)
+{
+  strtol_error xerr;
+
+  /* Parse number of values. */
+  long nrvals;
+  xerr = xstrtol (nrvals_str, NULL, 0, &nrvals, "");
+  if (xerr != LONGINT_OK) {
+    fprintf (stderr, _("%s: %s: invalid integer parameter (%s returned %d)\n"),
+             "setval", "nrvals", "xstrtol", xerr);
+    return -1;
+  }
+  if (nrvals < 0 || nrvals > HIVEX_MAX_VALUES) {
+    fprintf (stderr, _("%s: %s: integer out of range\n"),
+             "setval", "nrvals");
+    return -1;
+  }
+
+  struct hive_set_value *values =
+    calloc (nrvals, sizeof (struct hive_set_value));
+  if (values == NULL) {
+    perror ("calloc");
+    exit (EXIT_FAILURE);
+  }
+
+  int ret = -1;
+
+  /* Read nrvals * 2 lines of input, nrvals * (key, value) pairs, as
+   * explained in the man page.
+   */
+  int i, j;
+  for (i = 0; i < nrvals; ++i) {
+    /* Read key. */
+    char *buf = rl_gets ("  key> ");
+    if (!buf) {
+      fprintf (stderr, _("hivexsh: setval: unexpected end of input\n"));
+      quit = 1;
+      goto error;
+    }
+
+    /* Note that buf will be overwritten by the next call to rl_gets. */
+    if (STREQ (buf, "@"))
+      values[i].key = strdup ("");
+    else
+      values[i].key = strdup (buf);
+    if (values[i].key == NULL) {
+      perror ("strdup");
+      exit (EXIT_FAILURE);
+    }
+
+    /* Read value. */
+    buf = rl_gets ("value> ");
+    if (!buf) {
+      fprintf (stderr, _("hivexsh: setval: unexpected end of input\n"));
+      quit = 1;
+      goto error;
+    }
+
+    if (STREQ (buf, "none")) {
+      values[i].t = hive_t_none;
+      values[i].len = 0;
+    }
+    else if (STRPREFIX (buf, "string:")) {
+      buf += 7;
+      values[i].t = hive_t_string;
+      int nr_chars = strlen (buf);
+      values[i].len = 2 * (nr_chars + 1);
+      values[i].value = malloc (values[i].len);
+      if (!values[i].value) {
+        perror ("malloc");
+        exit (EXIT_FAILURE);
+      }
+      for (j = 0; j <= /* sic */ nr_chars; ++j) {
+        if (buf[j] & 0x80) {
+          fprintf (stderr, _("hivexsh: string(utf16le): only 7 bit ASCII strings are supported for input\n"));
+          goto error;
+        }
+        values[i].value[2*j] = buf[j];
+        values[i].value[2*j+1] = '\0';
+      }
+    }
+    else if (STRPREFIX (buf, "expandstring:")) {
+      buf += 13;
+      values[i].t = hive_t_expand_string;
+      int nr_chars = strlen (buf);
+      values[i].len = 2 * (nr_chars + 1);
+      values[i].value = malloc (values[i].len);
+      if (!values[i].value) {
+        perror ("malloc");
+        exit (EXIT_FAILURE);
+      }
+      for (j = 0; j <= /* sic */ nr_chars; ++j) {
+        if (buf[j] & 0x80) {
+          fprintf (stderr, _("hivexsh: string(utf16le): only 7 bit ASCII strings are supported for input\n"));
+          goto error;
+        }
+        values[i].value[2*j] = buf[j];
+        values[i].value[2*j+1] = '\0';
+      }
+    }
+    else if (STRPREFIX (buf, "dword:")) {
+      buf += 6;
+      values[i].t = hive_t_dword;
+      values[i].len = 4;
+      values[i].value = malloc (4);
+      if (!values[i].value) {
+        perror ("malloc");
+        exit (EXIT_FAILURE);
+      }
+      long n;
+      xerr = xstrtol (buf, NULL, 0, &n, "");
+      if (xerr != LONGINT_OK) {
+        fprintf (stderr, _("%s: %s: invalid integer parameter (%s returned %d)\n"),
+                 "setval", "dword", "xstrtol", xerr);
+        goto error;
+      }
+      if (n < 0 || n > UINT32_MAX) {
+        fprintf (stderr, _("%s: %s: integer out of range\n"),
+                 "setval", "dword");
+        goto error;
+      }
+      uint32_t u32 = htole32 (n);
+      memcpy (values[i].value, &u32, 4);
+    }
+    else if (STRPREFIX (buf, "qword:")) {
+      buf += 6;
+      values[i].t = hive_t_qword;
+      values[i].len = 8;
+      values[i].value = malloc (8);
+      if (!values[i].value) {
+        perror ("malloc");
+        exit (EXIT_FAILURE);
+      }
+      long long n;
+      xerr = xstrtoll (buf, NULL, 0, &n, "");
+      if (xerr != LONGINT_OK) {
+        fprintf (stderr, _("%s: %s: invalid integer parameter (%s returned %d)\n"),
+                 "setval", "dword", "xstrtoll", xerr);
+        goto error;
+      }
+#if 0
+      if (n < 0 || n > UINT64_MAX) {
+        fprintf (stderr, _("%s: %s: integer out of range\n"),
+                 "setval", "dword");
+        goto error;
+      }
+#endif
+      uint64_t u64 = htole64 (n);
+      memcpy (values[i].value, &u64, 4);
+    }
+    else if (STRPREFIX (buf, "hex:")) {
+      /* Read the type. */
+      buf += 4;
+      size_t len = strcspn (buf, ":");
+      char *nextbuf;
+      if (buf[len] == '\0')     /* "hex:t" */
+        nextbuf = &buf[len];
+      else {                    /* "hex:t:..." */
+        buf[len] = '\0';
+        nextbuf = &buf[len+1];
+      }
+
+      long t;
+      xerr = xstrtol (buf, NULL, 0, &t, "");
+      if (xerr != LONGINT_OK) {
+        fprintf (stderr, _("%s: %s: invalid integer parameter (%s returned %d)\n"),
+                 "setval", "hex", "xstrtol", xerr);
+        goto error;
+      }
+      if (t < 0 || t > UINT32_MAX) {
+        fprintf (stderr, _("%s: %s: integer out of range\n"),
+                 "setval", "hex");
+        goto error;
+      }
+      values[i].t = t;
+
+      /* Read the hex data. */
+      buf = nextbuf;
+
+      /* The allocation length is an overestimate, but it doesn't matter. */
+      values[i].value = malloc (1 + strlen (buf) / 2);
+      if (!values[i].value) {
+        perror ("malloc");
+        exit (EXIT_FAILURE);
+      }
+      values[i].len = 0;
+
+      while (*buf) {
+        int c = 0;
+
+        for (j = 0; *buf && j < 2; buf++) {
+          if (c_isxdigit (*buf)) { /* NB: ignore non-hex digits. */
+            c <<= 4;
+            c |= get_xdigit (*buf);
+            j++;
+          }
+        }
+
+        if (j == 2) values[i].value[values[i].len++] = c;
+        else if (j == 1) {
+          fprintf (stderr, _("hivexsh: setval: trailing garbage after hex string\n"));
+          goto error;
+        }
+      }
+    }
+    else {
+      fprintf (stderr,
+               _("hivexsh: setval: cannot parse value string, please refer to the man page hivexsh(1) for help: %s\n"),
+               buf);
+      goto error;
+    }
+  }
+
+  ret = hivex_node_set_values (h, cwd, nrvals, values, 0);
+
+ error:
+  /* Free values array. */
+  for (i = 0; i < nrvals; ++i) {
+    free (values[i].key);
+    free (values[i].value);
+  }
+  free (values);
+
+  return ret;
+}
+
+static int
+cmd_del (char *args)
+{
+  if (STRNEQ (args, "")) {
+    fprintf (stderr, _("hivexsh: '%s' command should not be given arguments\n"),
+             "del");
+    return -1;
+  }
+
+  if (cwd == hivex_root (h)) {
+    fprintf (stderr, _("hivexsh: del: the root node cannot be deleted\n"));
+    return -1;
+  }
+
+  hive_node_h new_cwd = hivex_node_parent (h, cwd);
+
+  if (hivex_node_delete_child (h, cwd) == -1) {
+    perror ("hivexsh: del");
+    return -1;
+  }
+
+  cwd = new_cwd;
+  set_prompt_string ();
+  return 0;
+}
+
+static int
+cmd_add (char *name)
+{
+  hive_node_h node = hivex_node_add_child (h, cwd, name);
+  if (node == 0) {
+    perror ("hivexsh: add");
+    return -1;
+  }
+  return 0;
+}