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-rw-r--r--src/rc/swclock.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/rc/swclock.c b/src/rc/swclock.c
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+++ b/src/rc/swclock.c
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+/*
+ swclock.c
+ Sets the system time from the mtime of the given file.
+ This is useful for systems who do not have a working RTC and rely on ntp.
+ OpenRC relies on the correct system time for a lot of operations so this is needed
+ quite early.
+*/
+
+/*
+ * Copyright (c) 2009 Roy Marples <roy@marples.name>
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <utime.h>
+
+#include "builtins.h"
+#include "einfo.h"
+#include "rc-misc.h"
+
+#define RC_SHUTDOWNTIME RC_SVCDIR "/shutdowntime"
+
+extern const char *applet;
+
+#include "_usage.h"
+#define extraopts "file"
+#define getoptstring "s" getoptstring_COMMON
+static const struct option longopts[] = {
+ { "save", 0, NULL, 's' },
+ longopts_COMMON
+};
+static const char * const longopts_help[] = {
+ "saves the time",
+ longopts_help_COMMON
+};
+#include "_usage.c"
+
+int
+swclock(int argc, char **argv)
+{
+ int opt, sflag = 0;
+ const char *file = RC_SHUTDOWNTIME;
+ struct stat sb;
+ struct timeval tv;
+
+ while ((opt = getopt_long(argc, argv, getoptstring,
+ longopts, (int *) 0)) != -1)
+ {
+ switch (opt) {
+ case 's':
+ sflag = 1;
+ break;
+ case_RC_COMMON_GETOPT;
+ }
+ }
+
+ if (optind < argc)
+ file = argv[optind++];
+
+ if (sflag) {
+ if (stat(file, &sb) == -1) {
+ opt = open(file, O_WRONLY | O_CREAT, 0644);
+ if (opt == -1)
+ eerrorx("swclock: open: %s", strerror(errno));
+ close(opt);
+ } else
+ if (utime(file, NULL) == -1)
+ eerrorx("swclock: utime: %s", strerror(errno));
+ return 0;
+ }
+
+ if (stat(file, &sb) == -1)
+ eerrorx("swclock: `%s': %s", file, strerror(errno));
+
+ tv.tv_sec = sb.st_mtime;
+ tv.tv_usec = 0;
+
+ if (settimeofday(&tv, NULL) == -1)
+ eerrorx("swclock: settimeofday: %s", strerror(errno));
+
+ return 0;
+}