+/* vi: set sw=4 ts=4: */
/*
* adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables.
*
* Last hack: March 2001
* Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License (Version 2,
- * June 1991) as published by the Free Software Foundation. At the
- * time of writing, that license was published by the FSF with the URL
- * http://www.gnu.org/copyleft/gpl.html, and is incorporated herein by
- * reference.
- *
- * 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.
- *
- * This adjtimex(1) is very similar in intent to adjtimex(8) by Steven
- * Dick <ssd@nevets.oau.org> and Jim Van Zandt <jrv@vanzandt.mv.com>
- * (see http://metalab.unc.edu/pub/Linux/system/admin/time/adjtimex*).
- * That version predates this one, and is _much_ bigger and more
- * featureful. My independently written version was very similar to
- * Steven's from the start, because they both follow the kernel timex
- * structure. I further tweaked this version to be equivalent to Steven's
- * where possible, but I don't like getopt_long, so the actual usage
- * syntax is incompatible.
- *
- * Amazingly enough, my Red Hat 5.2 sys/timex (and sub-includes)
- * don't actually give a prototype for adjtimex(2), so building
- * this code (with -Wall) gives a warning. Later versions of
- * glibc fix this issue.
- *
- * This program is too simple for a Makefile, just build with:
- * gcc -Wall -O adjtimex.c -o adjtimex
- *
* busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>
- * It will autosense if it is built in a busybox environment, based
- * on the BB_VER preprocessor macro.
+ *
+ * Licensed under GPLv2 or later, see file License in this tarball for details.
*/
-#include <stdio.h>
-#include <sys/types.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/timex.h>
-#ifdef BB_VER
#include "busybox.h"
-#endif
+#include <sys/timex.h>
-static struct {int bit; char *name;} statlist[] = {
+static const struct {int bit; const char *name;} statlist[] = {
{ STA_PLL, "PLL" },
{ STA_PPSFREQ, "PPSFREQ" },
{ STA_PPSTIME, "PPSTIME" },
{ STA_CLOCKERR, "CLOCKERR" },
{ 0, NULL } };
-static char *ret_code_descript[] = {
+static const char * const ret_code_descript[] = {
"clock synchronized",
"insert leap second",
"delete leap second",
"leap second has occurred",
"clock not synchronized" };
-#ifdef BB_VER
-#define main adjtimex_main
-#else
-void usage(char *prog)
-{
- fprintf(stderr,
- "Usage: %s [ -q ] [ -o offset ] [ -f frequency ] [ -p timeconstant ] [ -t tick ]\n",
- prog);
-}
-#define show_usage() usage(argv[0])
-#endif
-
-int main(int argc, char ** argv)
+int adjtimex_main(int argc, char **argv);
+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 quiet=0;
- int c, i, ret, sep;
- char *descript;
+ int i, ret, sep;
+ const char *descript;
txc.modes=0;
- for (;;) {
- c = getopt( argc, argv, "qo:f:p:t:");
- if (c == EOF) break;
- switch (c) {
- case 'q':
- quiet=1;
- break;
- case 'o':
- txc.offset = atoi(optarg);
- txc.modes |= ADJ_OFFSET_SINGLESHOT;
- break;
- case 'f':
- txc.freq = atoi(optarg);
- txc.modes |= ADJ_FREQUENCY;
- break;
- case 'p':
- txc.constant = atoi(optarg);
- txc.modes |= ADJ_TIMECONST;
- break;
- case 't':
- txc.tick = atoi(optarg);
- txc.modes |= ADJ_TICK;
- break;
- default:
- show_usage();
- exit(1);
- }
+
+ opt = getopt32(argc, argv, "qo:f:p:t:",
+ &opt_o, &opt_f, &opt_p, &opt_t);
+ //if (opt & 0x1) // -q
+ if (opt & 0x2) { // -o
+ txc.offset = xatoi(opt_o);
+ txc.modes |= ADJ_OFFSET_SINGLESHOT;
+ }
+ if (opt & 0x4) { // -f
+ txc.freq = xatou(opt_f);
+ txc.modes |= ADJ_FREQUENCY;
+ }
+ if (opt & 0x8) { // -p
+ txc.constant = xatoi(opt_p);
+ txc.modes |= ADJ_TIMECONST;
+ }
+ if (opt & 0x10) { // -t
+ txc.tick = xatoi(opt_t);
+ txc.modes |= ADJ_TICK;
}
if (argc != optind) { /* no valid non-option parameters */
- show_usage();
- exit(1);
+ bb_show_usage();
}
ret = adjtimex(&txc);
if (ret < 0) perror("adjtimex");
-
- if (!quiet && ret>=0) {
+
+ if (!(opt & OPT_quiet) && ret>=0) {
printf(
" mode: %d\n"
"-o offset: %ld\n"
" return value: %d (%s)\n",
txc.constant,
txc.precision, txc.tolerance, txc.tick,
- txc.time.tv_sec, txc.time.tv_usec, ret, descript);
+ (long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
}
return (ret<0);
}
projects / oweals / busybox.git / blobdiff