1 files changed, 117 insertions, 0 deletions

diff --git a/miscutils/adjtimex.c b/miscutils/adjtimex.c
new file mode 100644
index 000000000..b35538a84
--- /dev/null
+++ b/miscutils/adjtimex.c
@@ -0,0 +1,117 @@
+/* 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 "busybox.h"
+#include <sys/timex.h>
+
+static const struct {int bit; const char *name;} statlist[] = {
+        { STA_PLL,       "PLL"       },
+        { STA_PPSFREQ,   "PPSFREQ"   },
+        { STA_PPSTIME,   "PPSTIME"   },
+        { STA_FLL,       "FFL"       },
+        { STA_INS,       "INS"       },
+        { STA_DEL,       "DEL"       },
+        { STA_UNSYNC,    "UNSYNC"    },
+        { STA_FREQHOLD,  "FREQHOLD"  },
+        { STA_PPSSIGNAL, "PPSSIGNAL" },
+        { STA_PPSJITTER, "PPSJITTER" },
+        { STA_PPSWANDER, "PPSWANDER" },
+        { STA_PPSERROR,  "PPSERROR"  },
+        { STA_CLOCKERR,  "CLOCKERR"  },
+        { 0, NULL } };
+
+static const char * const ret_code_descript[] = {
+        "clock synchronized",
+        "insert leap second",
+        "delete leap second",
+        "leap second in progress",
+        "leap second has occurred",
+        "clock not synchronized" };
+
+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, sep;
+        const char *descript;
+        txc.modes=0;
+
+        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 */
+                bb_show_usage();
+        }
+
+        ret = adjtimex(&txc);
+
+        if (ret < 0) perror("adjtimex");
+
+        if (!(opt & OPT_quiet) && ret>=0) {
+                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" */
+                sep=0;
+                for (i=0; statlist[i].name; i++) {
+                        if (txc.status & statlist[i].bit) {
+                                if (sep) fputs(" | ",stdout);
+                                fputs(statlist[i].name,stdout);
+                                sep=1;
+                        }
+                }
+
+                descript = "error";
+                if (ret >= 0 && ret <= 5) descript = 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 (ret<0);
+}