122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
/*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/**
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* @file
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* @brief loadenv: Restoring a environment
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*/
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#include <common.h>
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#include <getopt.h>
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#include <command.h>
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#include <envfs.h>
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#include <errno.h>
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#include <fs.h>
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#include <malloc.h>
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static int do_loadenv(int argc, char *argv[])
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{
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char *filename = NULL, *dirname;
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unsigned flags = 0;
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int opt;
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int scrub = 0;
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int defaultenv = 0;
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while ((opt = getopt(argc, argv, "nsd")) > 0) {
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switch (opt) {
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case 'n':
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flags |= ENV_FLAG_NO_OVERWRITE;
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break;
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case 's':
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scrub = 1;
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break;
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case 'd':
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defaultenv = 1;
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break;
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default:
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return COMMAND_ERROR_USAGE;
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}
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}
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if (argc - optind < 2)
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dirname = "/env";
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else
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dirname = argv[optind + 1];
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if (argc - optind < 1) {
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filename = default_environment_path_get();
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} else {
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char *str = normalise_path(argv[optind]);
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/*
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* /dev/defaultenv use to contain the defaultenvironment.
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* we do not have this file anymore, but maintain compatibility
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* to the 'loadenv -s /dev/defaultenv' command to restore the
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* default environment for some time.
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*/
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if (!strcmp(str, "/dev/defaultenv"))
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defaultenv = 1;
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else
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filename = argv[optind];
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free(str);
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}
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if (scrub) {
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int ret;
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ret = unlink_recursive(dirname, NULL);
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if (ret && ret != -ENOENT) {
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eprintf("cannot remove %s: %s\n", dirname,
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strerror(-ret));
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return 1;
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}
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ret = mkdir(dirname, 0);
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if (ret) {
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eprintf("cannot create %s: %s\n", dirname,
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strerror(-ret));
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return ret;
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}
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}
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printf("loading environment from %s\n", defaultenv ? "defaultenv" : filename);
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if (defaultenv)
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return defaultenv_load(dirname, flags);
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else
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return envfs_load(filename, dirname, flags);
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}
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BAREBOX_CMD_HELP_START(loadenv)
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BAREBOX_CMD_HELP_TEXT("Load environment from files in ENVFS (default /dev/env0) in")
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BAREBOX_CMD_HELP_TEXT("DIRECTORY (default /env")
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BAREBOX_CMD_HELP_TEXT("")
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT("-n", "do not overwrite existing files")
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BAREBOX_CMD_HELP_OPT("-s", "scrub old environment")
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BAREBOX_CMD_HELP_OPT("-d", "load default environment")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(loadenv)
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.cmd = do_loadenv,
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BAREBOX_CMD_DESC("load environment from ENVFS")
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BAREBOX_CMD_OPTS("{-nsd] [ENVFS] [DIRECTORY]")
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BAREBOX_CMD_GROUP(CMD_GRP_ENV)
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BAREBOX_CMD_HELP(cmd_loadenv_help)
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BAREBOX_CMD_END
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