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-rw-r--r--util/grub-editenv.c305
1 files changed, 305 insertions, 0 deletions
diff --git a/util/grub-editenv.c b/util/grub-editenv.c
new file mode 100644
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--- /dev/null
+++ b/util/grub-editenv.c
@@ -0,0 +1,305 @@
+/* grub-editenv.c - tool to edit environment block. */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2008,2009,2010 Free Software Foundation, Inc.
+ *
+ * GRUB 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <grub/types.h>
+#include <grub/emu/misc.h>
+#include <grub/util/misc.h>
+#include <grub/lib/envblk.h>
+#include <grub/i18n.h>
+#include <grub/emu/hostfile.h>
+#include <grub/util/install.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#pragma GCC diagnostic ignored "-Wmissing-declarations"
+#include <argp.h>
+#pragma GCC diagnostic error "-Wmissing-prototypes"
+#pragma GCC diagnostic error "-Wmissing-declarations"
+
+
+#include "progname.h"
+
+#define DEFAULT_ENVBLK_PATH DEFAULT_DIRECTORY "/" GRUB_ENVBLK_DEFCFG
+
+static struct argp_option options[] = {
+ {0, 0, 0, OPTION_DOC, N_("Commands:"), 1},
+ {"create", 0, 0, OPTION_DOC|OPTION_NO_USAGE,
+ N_("Create a blank environment block file."), 0},
+ {"list", 0, 0, OPTION_DOC|OPTION_NO_USAGE,
+ N_("List the current variables."), 0},
+ /* TRANSLATORS: "set" is a keyword. It's a summary of "set" subcommand. */
+ {N_("set [NAME=VALUE ...]"), 0, 0, OPTION_DOC|OPTION_NO_USAGE,
+ N_("Set variables."), 0},
+ /* TRANSLATORS: "unset" is a keyword. It's a summary of "unset" subcommand. */
+ {N_("unset [NAME ...]"), 0, 0, OPTION_DOC|OPTION_NO_USAGE,
+ N_("Delete variables."), 0},
+
+ {0, 0, 0, OPTION_DOC, N_("Options:"), -1},
+ {"verbose", 'v', 0, 0, N_("print verbose messages."), 0},
+
+ { 0, 0, 0, 0, 0, 0 }
+};
+
+/* Print the version information. */
+static void
+print_version (FILE *stream, struct argp_state *state)
+{
+ fprintf (stream, "%s (%s) %s\n", program_name, PACKAGE_NAME, PACKAGE_VERSION);
+}
+void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
+
+/* Set the bug report address */
+const char *argp_program_bug_address = "<"PACKAGE_BUGREPORT">";
+
+static error_t argp_parser (int key, char *arg, struct argp_state *state)
+{
+ switch (key)
+ {
+ case 'v':
+ verbosity++;
+ break;
+
+ case ARGP_KEY_NO_ARGS:
+ fprintf (stderr, "%s",
+ _("You need to specify at least one command.\n"));
+ argp_usage (state);
+ break;
+
+ default:
+ return ARGP_ERR_UNKNOWN;
+ }
+
+ return 0;
+}
+
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
+
+static char *
+help_filter (int key, const char *text, void *input __attribute__ ((unused)))
+{
+ switch (key)
+ {
+ case ARGP_KEY_HELP_POST_DOC:
+ return xasprintf (text, DEFAULT_ENVBLK_PATH, DEFAULT_ENVBLK_PATH);
+
+ default:
+ return (char *) text;
+ }
+}
+
+#pragma GCC diagnostic error "-Wformat-nonliteral"
+
+struct argp argp = {
+ options, argp_parser, N_("FILENAME COMMAND"),
+ "\n"N_("\
+Tool to edit environment block.")
+"\v"N_("\
+If FILENAME is `-', the default value %s is used.\n\n\
+There is no `delete' command; if you want to delete the whole environment\n\
+block, use `rm %s'."),
+ NULL, help_filter, NULL
+};
+
+static grub_envblk_t
+open_envblk_file (const char *name)
+{
+ FILE *fp;
+ char *buf;
+ long loc;
+ size_t size;
+ grub_envblk_t envblk;
+
+ fp = grub_util_fopen (name, "rb");
+ if (! fp)
+ {
+ /* Create the file implicitly. */
+ grub_util_create_envblk_file (name);
+ fp = grub_util_fopen (name, "rb");
+ if (! fp)
+ grub_util_error (_("cannot open `%s': %s"), name,
+ strerror (errno));
+ }
+
+ if (fseek (fp, 0, SEEK_END) < 0)
+ grub_util_error (_("cannot seek `%s': %s"), name,
+ strerror (errno));
+
+ loc = ftell (fp);
+ if (loc < 0)
+ grub_util_error (_("cannot get file location `%s': %s"), name,
+ strerror (errno));
+
+ size = (size_t) loc;
+
+ if (fseek (fp, 0, SEEK_SET) < 0)
+ grub_util_error (_("cannot seek `%s': %s"), name,
+ strerror (errno));
+
+ buf = xmalloc (size);
+
+ if (fread (buf, 1, size, fp) != size)
+ grub_util_error (_("cannot read `%s': %s"), name,
+ strerror (errno));
+
+ fclose (fp);
+
+ envblk = grub_envblk_open (buf, size);
+ if (! envblk)
+ grub_util_error ("%s", _("invalid environment block"));
+
+ return envblk;
+}
+
+static int
+print_var (const char *varname, const char *value,
+ void *hook_data __attribute__ ((unused)))
+{
+ printf ("%s=%s\n", varname, value);
+ return 0;
+}
+
+static void
+list_variables (const char *name)
+{
+ grub_envblk_t envblk;
+
+ envblk = open_envblk_file (name);
+ grub_envblk_iterate (envblk, NULL, print_var);
+ grub_envblk_close (envblk);
+}
+
+static void
+write_envblk (const char *name, grub_envblk_t envblk)
+{
+ FILE *fp;
+
+ fp = grub_util_fopen (name, "wb");
+ if (! fp)
+ grub_util_error (_("cannot open `%s': %s"), name,
+ strerror (errno));
+
+ if (fwrite (grub_envblk_buffer (envblk), 1, grub_envblk_size (envblk), fp)
+ != grub_envblk_size (envblk))
+ grub_util_error (_("cannot write to `%s': %s"), name,
+ strerror (errno));
+
+ if (grub_util_file_sync (fp) < 0)
+ grub_util_error (_("cannot sync `%s': %s"), name, strerror (errno));
+ fclose (fp);
+}
+
+static void
+set_variables (const char *name, int argc, char *argv[])
+{
+ grub_envblk_t envblk;
+
+ envblk = open_envblk_file (name);
+ while (argc)
+ {
+ char *p;
+
+ p = strchr (argv[0], '=');
+ if (! p)
+ grub_util_error (_("invalid parameter %s"), argv[0]);
+
+ *(p++) = 0;
+
+ if (! grub_envblk_set (envblk, argv[0], p))
+ grub_util_error ("%s", _("environment block too small"));
+
+ argc--;
+ argv++;
+ }
+
+ write_envblk (name, envblk);
+ grub_envblk_close (envblk);
+}
+
+static void
+unset_variables (const char *name, int argc, char *argv[])
+{
+ grub_envblk_t envblk;
+
+ envblk = open_envblk_file (name);
+ while (argc)
+ {
+ grub_envblk_delete (envblk, argv[0]);
+
+ argc--;
+ argv++;
+ }
+
+ write_envblk (name, envblk);
+ grub_envblk_close (envblk);
+}
+
+int
+main (int argc, char *argv[])
+{
+ const char *filename;
+ char *command;
+ int curindex, arg_count;
+
+ grub_util_host_init (&argc, &argv);
+
+ /* Parse our arguments */
+ if (argp_parse (&argp, argc, argv, 0, &curindex, 0) != 0)
+ {
+ fprintf (stderr, "%s", _("Error in parsing command line arguments\n"));
+ exit(1);
+ }
+
+ arg_count = argc - curindex;
+
+ if (arg_count == 1)
+ {
+ filename = DEFAULT_ENVBLK_PATH;
+ command = argv[curindex++];
+ }
+ else
+ {
+ filename = argv[curindex++];
+ if (strcmp (filename, "-") == 0)
+ filename = DEFAULT_ENVBLK_PATH;
+ command = argv[curindex++];
+ }
+
+ if (strcmp (command, "create") == 0)
+ grub_util_create_envblk_file (filename);
+ else if (strcmp (command, "list") == 0)
+ list_variables (filename);
+ else if (strcmp (command, "set") == 0)
+ set_variables (filename, argc - curindex, argv + curindex);
+ else if (strcmp (command, "unset") == 0)
+ unset_variables (filename, argc - curindex, argv + curindex);
+ else
+ {
+ char *program = xstrdup(program_name);
+ fprintf (stderr, _("Unknown command `%s'.\n"), command);
+ argp_help (&argp, stderr, ARGP_HELP_STD_USAGE, program);
+ free(program);
+ exit(1);
+ }
+
+ return 0;
+}
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