Add utility function ticks_per_second() to get jiffies per second (aka HZ)

Currently uses sysconf(_SC_TC_CLK) to be more portable.

lib/inet6_gr.c

@@ -165,6 +165,7 @@ int rprint_cache6(int ext, int numeric)
     int type, refcnt, prefix_len, location, state, gc;
     long tstamp, expire, ndflags, reachable, stale, delete;
     FILE *fp = fopen(_PATH_PROCNET_NDISC, "r");
+    long clk_tck = ticks_per_second();
     char addr6p[8][5], haddrp[6][3];
 
     if (!fp) {
@@ -257,11 +258,11 @@ int rprint_cache6(int ext, int numeric)
 	    stale = reachable > tstamp ? reachable - tstamp : 0;
 	delete = gc > tstamp ? gc - tstamp : 0;
 	if (ext != 2) {
-	    printf(" %-9ld ", stale / HZ);
+	    printf(" %-9ld ", stale / clk_tck);
 	    if (refcnt)
 		printf(" * ");
 	    else
-		printf(" %-7ld ", delete / HZ);
+		printf(" %-7ld ", delete / clk_tck);
 	}
 	printf("\n");
     }

lib/inet_sr.c

@@ -64,6 +64,7 @@ static int INET_setroute(int action, int options, char **args)
     struct rtentry rt;
     char target[128], gateway[128] = "NONE", netmask[128] = "default";
     int xflag, isnet;
+    long clk_tck = ticks_per_second();
 
     xflag = 0;
 
@@ -199,9 +200,9 @@ static int INET_setroute(int action, int options, char **args)
 #if HAVE_RTF_IRTT
 	    rt.rt_flags |= RTF_IRTT;
 	    rt.rt_irtt = atoi(*(args - 1));
-	    rt.rt_irtt *= (HZ / 100);	/* FIXME */
+	    rt.rt_irtt *= (clk_tck / 100);	/* FIXME */
 #if 0				/* FIXME: do we need to check anything of this? */
-	    if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * HZ)) {
+	    if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * clk_tck)) {
 		fprintf(stderr, _("route: Invalid initial rtt.\n"));
 		return usage(E_OPTERR);
 	    }

lib/util.c

@@ -4,6 +4,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/utsname.h>
+#include <unistd.h>
 
 #include "util.h"
 
@@ -51,6 +52,10 @@ int kernel_version(void)
     return KRELEASE(major, minor, patch);
 }
 
+long ticks_per_second(void)
+{
+    return sysconf(_SC_CLK_TCK);
+}
 
 /* Like strncpy but make sure the resulting string is always 0 terminated. */
 char *safe_strncpy(char *dst, const char *src, size_t size)

lib/util.h

@@ -10,6 +10,7 @@ char *xstrdup(const char *src);
 int kernel_version(void);
 #define KRELEASE(maj,min,patch) ((maj) * 10000 + (min)*1000 + (patch))
 
+long ticks_per_second(void);
 
 int nstrcmp(const char *, const char *);
 

netstat.c

@@ -972,6 +972,7 @@ static void tcp_do_one(int lnr, const char *line, const char *prot)
 #else
     struct sockaddr_in localaddr, remaddr;
 #endif
+    long clk_tck = ticks_per_second();
 
     if (lnr == 0)
 	return;
@@ -1032,27 +1033,27 @@ static void tcp_do_one(int lnr, const char *line, const char *prot)
 
 	    case 1:
 		snprintf(timers, sizeof(timers), _("on (%2.2f/%ld/%d)"),
-			 (double) time_len / HZ, retr, timeout);
+			 (double) time_len / clk_tck, retr, timeout);
 		break;
 
 	    case 2:
 		snprintf(timers, sizeof(timers), _("keepalive (%2.2f/%ld/%d)"),
-			 (double) time_len / HZ, retr, timeout);
+			 (double) time_len / clk_tck, retr, timeout);
 		break;
 
 	    case 3:
 		snprintf(timers, sizeof(timers), _("timewait (%2.2f/%ld/%d)"),
-			 (double) time_len / HZ, retr, timeout);
+			 (double) time_len / clk_tck, retr, timeout);
 		break;
 
 	    case 4:
 		snprintf(timers, sizeof(timers), _("probe (%2.2f/%ld/%d)"),
-			 (double) time_len / HZ, retr, timeout);
+			 (double) time_len / clk_tck, retr, timeout);
 		break;
 
 	    default:
 		snprintf(timers, sizeof(timers), _("unkn-%d (%2.2f/%ld/%d)"),
-			 timer_run, (double) time_len / HZ, retr, timeout);
+			 timer_run, (double) time_len / clk_tck, retr, timeout);
 		break;
 	    }