123 lines
3.1 KiB
C
123 lines
3.1 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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* @file
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* @brief saveenv: Make the environment persistent
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*/
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#include <common.h>
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#include <command.h>
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#include <errno.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <environment.h>
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static int do_saveenv(struct command *cmdtp, int argc, char *argv[])
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{
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int ret, fd;
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char *filename, *dirname;
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printf("saving environment\n");
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if (argc < 3)
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dirname = "/env";
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else
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dirname = argv[2];
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if (argc < 2)
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filename = "/dev/env0";
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else
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filename = argv[1];
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fd = open(filename, O_WRONLY | O_CREAT);
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if (fd < 0) {
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printf("could not open %s: %s\n", filename, errno_str());
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return 1;
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}
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ret = protect(fd, ~0, 0, 0);
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/* ENOSYS is no error here, many devices do not need it */
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if (ret && errno != -ENOSYS) {
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printf("could not unprotect %s: %s\n", filename, errno_str());
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close(fd);
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return 1;
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}
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ret = erase(fd, ~0, 0);
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/* ENOSYS is no error here, many devices do not need it */
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if (ret && errno != -ENOSYS) {
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printf("could not erase %s: %s\n", filename, errno_str());
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close(fd);
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return 1;
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}
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close(fd);
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ret = envfs_save(filename, dirname);
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if (ret) {
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printf("saveenv failed\n");
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goto out;
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}
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fd = open(filename, O_WRONLY | O_CREAT);
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ret = protect(fd, ~0, 0, 1);
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/* ENOSYS is no error here, many devices do not need it */
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if (ret && errno != -ENOSYS) {
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printf("could not protect %s: %s\n", filename, errno_str());
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close(fd);
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return 1;
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}
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ret = 0;
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out:
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close(fd);
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return ret;
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}
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static const __maybe_unused char cmd_saveenv_help[] =
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"Usage: saveenv [<envfs>] [<directory>]\n"
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"Save the files in <directory> to the persistent storage device <envfs>.\n"
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"<envfs> is normally a block in flash, but could be any other file.\n"
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"If ommitted <directory> defaults to /env and <envfs> defaults to /dev/env0.\n"
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"Note that envfs can only handle files. Directories are skipped silently.\n";
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BAREBOX_CMD_START(saveenv)
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.cmd = do_saveenv,
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.usage = "save environment to persistent storage",
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BAREBOX_CMD_HELP(cmd_saveenv_help)
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BAREBOX_CMD_END
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/**
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* @page saveenv_command saveenv
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*
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* Usage: saveenv [\<envfs>] [\<directory>]
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*
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* Save the files in \<directory> to the persistent storage device \<envfs>.
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* \<envfs> is normally a block in flash, but could be any other file.
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*
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* If ommitted \<directory> defaults to \c /env and \<envfs> defaults to
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* \c /dev/env0.
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*
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* @note envfs can only handle files. Directories are skipped silently.
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*/
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