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/*
* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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.
*
*/
/**
* @file
* @brief loadenv: Restoring a environment
*/
#include <common.h>
#include <getopt.h>
#include <command.h>
#include <envfs.h>
#include <errno.h>
#include <fs.h>
#include <malloc.h>
static int do_loadenv(int argc, char *argv[])
{
char *filename = NULL, *dirname;
unsigned flags = 0;
int opt;
int scrub = 0;
int defaultenv = 0;
while ((opt = getopt(argc, argv, "nsd")) > 0) {
switch (opt) {
case 'n':
flags |= ENV_FLAG_NO_OVERWRITE;
break;
case 's':
scrub = 1;
break;
case 'd':
defaultenv = 1;
break;
default:
return COMMAND_ERROR_USAGE;
}
}
if (argc - optind < 2)
dirname = "/env";
else
dirname = argv[optind + 1];
if (argc - optind < 1) {
filename = default_environment_path_get();
} else {
char *str = normalise_path(argv[optind]);
/*
* /dev/defaultenv use to contain the defaultenvironment.
* we do not have this file anymore, but maintain compatibility
* to the 'loadenv -s /dev/defaultenv' command to restore the
* default environment for some time.
*/
if (!strcmp(str, "/dev/defaultenv"))
defaultenv = 1;
else
filename = argv[optind];
free(str);
}
if (scrub) {
int ret;
ret = unlink_recursive(dirname, NULL);
if (ret && ret != -ENOENT) {
eprintf("cannot remove %s: %s\n", dirname,
strerror(-ret));
return 1;
}
ret = mkdir(dirname, 0);
if (ret) {
eprintf("cannot create %s: %s\n", dirname,
strerror(-ret));
return ret;
}
}
printf("loading environment from %s\n", defaultenv ? "defaultenv" : filename);
if (defaultenv)
return defaultenv_load(dirname, flags);
else
return envfs_load(filename, dirname, flags);
}
BAREBOX_CMD_HELP_START(loadenv)
BAREBOX_CMD_HELP_TEXT("Load environment from files in ENVFS (default /dev/env0) in")
BAREBOX_CMD_HELP_TEXT("DIRECTORY (default /env")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT("-n", "do not overwrite existing files")
BAREBOX_CMD_HELP_OPT("-s", "scrub old environment")
BAREBOX_CMD_HELP_OPT("-d", "load default environment")
BAREBOX_CMD_HELP_END
/**
* @page loadenv_command
ENVFS can only handle files, directories are skipped silently.
\todo This needs proper documentation. What is ENVFS, why is it FS etc. Explain the concepts.
*/
BAREBOX_CMD_START(loadenv)
.cmd = do_loadenv,
BAREBOX_CMD_DESC("load environment from ENVFS")
BAREBOX_CMD_OPTS("{-nsd] [ENVFS] [DIRECTORY]")
BAREBOX_CMD_GROUP(CMD_GRP_ENV)
BAREBOX_CMD_HELP(cmd_loadenv_help)
BAREBOX_CMD_END
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