1 files changed, 145 insertions, 0 deletions
diff --git a/miscutils/adjtimex.c b/miscutils/adjtimex.c
new file mode 100644
index 0000000..07f0834
--- /dev/null
+++ b/miscutils/adjtimex.c
@@ -0,0 +1,145 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables.
+ *
+ * Originally written: October 1997
+ * Last hack: March 2001
+ * Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov>
+ *
+ * busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>
+ *
+ * Licensed under GPLv2 or later, see file License in this tarball for details.
+ */
+
+#include "libbb.h"
+#include <sys/timex.h>
+
+static const uint16_t statlist_bit[] = {
+	STA_PLL,
+	STA_PPSFREQ,
+	STA_PPSTIME,
+	STA_FLL,
+	STA_INS,
+	STA_DEL,
+	STA_UNSYNC,
+	STA_FREQHOLD,
+	STA_PPSSIGNAL,
+	STA_PPSJITTER,
+	STA_PPSWANDER,
+	STA_PPSERROR,
+	STA_CLOCKERR,
+	0
+};
+static const char statlist_name[] =
+	"PLL"       "\0"
+	"PPSFREQ"   "\0"
+	"PPSTIME"   "\0"
+	"FFL"       "\0"
+	"INS"       "\0"
+	"DEL"       "\0"
+	"UNSYNC"    "\0"
+	"FREQHOLD"  "\0"
+	"PPSSIGNAL" "\0"
+	"PPSJITTER" "\0"
+	"PPSWANDER" "\0"
+	"PPSERROR"  "\0"
+	"CLOCKERR"
+;
+
+static const char ret_code_descript[] =
+	"clock synchronized" "\0"
+	"insert leap second" "\0"
+	"delete leap second" "\0"
+	"leap second in progress" "\0"
+	"leap second has occurred" "\0"
+	"clock not synchronized"
+;
+
+int adjtimex_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int adjtimex_main(int argc, char **argv)
+{
+	enum {
+		OPT_quiet = 0x1
+	};
+	unsigned opt;
+	char *opt_o, *opt_f, *opt_p, *opt_t;
+	struct timex txc;
+	int i, ret;
+	const char *descript;
+	txc.modes=0;
+
+	opt = getopt32(argv, "qo:f:p:t:",
+			&opt_o, &opt_f, &opt_p, &opt_t);
+	//if (opt & 0x1) // -q
+	if (opt & 0x2) { // -o
+		txc.offset = xatol(opt_o);
+		txc.modes |= ADJ_OFFSET_SINGLESHOT;
+	}
+	if (opt & 0x4) { // -f
+		txc.freq = xatol(opt_f);
+		txc.modes |= ADJ_FREQUENCY;
+	}
+	if (opt & 0x8) { // -p
+		txc.constant = xatol(opt_p);
+		txc.modes |= ADJ_TIMECONST;
+	}
+	if (opt & 0x10) { // -t
+		txc.tick = xatol(opt_t);
+		txc.modes |= ADJ_TICK;
+	}
+	if (argc != optind) { /* no valid non-option parameters */
+		bb_show_usage();
+	}
+
+	ret = adjtimex(&txc);
+
+	if (ret < 0) {
+		bb_perror_nomsg_and_die();
+	}
+
+	if (!(opt & OPT_quiet)) {
+		int sep;
+		const char *name;
+
+		printf(
+			"    mode:         %d\n"
+			"-o  offset:       %ld\n"
+			"-f  frequency:    %ld\n"
+			"    maxerror:     %ld\n"
+			"    esterror:     %ld\n"
+			"    status:       %d (",
+		txc.modes, txc.offset, txc.freq, txc.maxerror,
+		txc.esterror, txc.status);
+
+		/* representative output of next code fragment:
+		   "PLL | PPSTIME" */
+		name = statlist_name;
+		sep = 0;
+		for (i = 0; statlist_bit[i]; i++) {
+			if (txc.status & statlist_bit[i]) {
+				if (sep)
+					fputs(" | ", stdout);
+				fputs(name, stdout);
+				sep = 1;
+			}
+			name += strlen(name) + 1;
+		}
+
+		descript = "error";
+		if (ret <= 5)
+			descript = nth_string(ret_code_descript, ret);
+		printf(")\n"
+			"-p  timeconstant: %ld\n"
+			"    precision:    %ld\n"
+			"    tolerance:    %ld\n"
+			"-t  tick:         %ld\n"
+			"    time.tv_sec:  %ld\n"
+			"    time.tv_usec: %ld\n"
+			"    return value: %d (%s)\n",
+		txc.constant,
+		txc.precision, txc.tolerance, txc.tick,
+		(long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
+	}
+
+	return 0;
+}