[Git][NTPsec/ntpsec][master] Add util/bumpclock.c which should have been in the previous commit

[Hal Murray]

Hal Murray pushed to branch master at NTPsec / ntpsec


Commits:
498caa21 by Hal Murray at 2015-12-01T04:19:25Z
Add util/bumpclock.c which should have been in the previous commit

- - - - -


1 changed file:

- + util/bumpclock.c


Changes:

=====================================
util/bumpclock.c
=====================================
--- /dev/null
+++ b/util/bumpclock.c
@@ -0,0 +1,62 @@
+/*
+ * Hack to bump the system time for testing ntpd response.
+ * Must be run as root.
+ * Arg is microseconds, default is 100000.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+
+int main(int argc, char *argv[]) {
+    struct timeval was, set, now;
+    int rc1, rc2, rc3;
+    int er1, er2, er3;
+    int bump = 100000;
+
+    if (argc > 1) {
+	bump = atoi(argv[1]);
+    }
+    printf("Bumping clock by %d microseconds.\n", bump);
+
+    rc1 = gettimeofday(&was, NULL);
+    er1 = errno;
+
+    set = was;
+    set.tv_usec += bump;
+    while (set.tv_usec >= 1000000 ) {
+	set.tv_usec -= 1000000;
+	set.tv_sec +=1;
+    }
+    while (set.tv_usec <= 0 ) {
+	set.tv_usec += 1000000;
+	set.tv_sec -=1;
+    }
+    rc2 = settimeofday(&set, NULL);
+    er2 = errno;
+
+    rc3 = gettimeofday(&now, NULL);
+    er3 = errno;
+
+    /* Defer printing so it doesn't distort timing. */
+    if (rc1)
+	printf("Couldn't get time: %s\n", strerror(er1));
+    else
+	printf("Was: %ld.%06ld\n", (long)was.tv_sec, (long)was.tv_usec);
+
+    if (rc2) {
+	printf("Couldn't set time: %s\n", strerror(er2));
+	printf("Try: %ld.%06ld\n", (long)set.tv_sec, (long)set.tv_usec);
+    } else
+	printf("Set: %ld.%06ld\n", (long)set.tv_sec, (long)set.tv_usec);
+ 
+   if (rc3)
+	printf("Couldn't set time: %s\n", strerror(er3));
+    else
+	printf("Now: %ld.%06ld\n", (long)now.tv_sec, (long)now.tv_usec);
+
+    return (rc1!=0 || rc2!=0 || rc3!=0);
+
+}



View it on GitLab: https://gitlab.com/NTPsec/ntpsec/commit/498caa219cb44231b0128200cc46859b24150538
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