Initial revision

libproc/whattime.c

@@ -0,0 +1,89 @@
+/* This is a trivial uptime program.  I hereby release this program
+ * into the public domain.  I disclaim any responsibility for this
+ * program --- use it at your own risk.  (as if there were any.. ;-)
+ * -michaelkjohnson (johnsonm@sunsite.unc.edu)
+ *
+ * Modified by Larry Greenfield to give a more traditional output,
+ * count users, etc.  (greenfie@gauss.rutgers.edu)
+ *
+ * Modified by mkj again to fix a few tiny buglies.
+ *
+ * Modified by J. Cowley to add printing the uptime message to a
+ * string (for top) and to optimize file handling.  19 Mar 1993.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+#include <utmp.h>
+#include <sys/ioctl.h>
+#include "proc/whattime.h"
+#include "proc/sysinfo.h"
+
+static char buf[128];
+double av[3];
+
+char *sprint_uptime(void) {
+  struct utmp *utmpstruct;
+  int upminutes, uphours, updays;
+  int pos;
+  struct tm *realtime;
+  time_t realseconds;
+  int numuser;
+  double uptime_secs, idle_secs;
+
+/* first get the current time */
+
+  time(&realseconds);
+  realtime = localtime(&realseconds);
+  pos = sprintf(buf, " %2d:%02d%s  ",
+		realtime->tm_hour%12 ? realtime->tm_hour%12 : 12,
+		realtime->tm_min, realtime->tm_hour > 11 ? "pm" : "am");
+
+/* read and calculate the amount of uptime */
+
+  uptime(&uptime_secs, &idle_secs);
+
+  updays = (int) uptime_secs / (60*60*24);
+  strcat (buf, "up ");
+  pos += 3;
+  if (updays)
+    pos += sprintf(buf + pos, "%d day%s, ", updays, (updays != 1) ? "s" : "");
+  upminutes = (int) uptime_secs / 60;
+  uphours = upminutes / 60;
+  uphours = uphours % 24;
+  upminutes = upminutes % 60;
+  if(uphours)
+    pos += sprintf(buf + pos, "%2d:%02d, ", uphours, upminutes);
+  else
+    pos += sprintf(buf + pos, "%d min, ", upminutes);
+
+/* count the number of users */
+
+  numuser = 0;
+  setutent();
+  while ((utmpstruct = getutent())) {
+    if ((utmpstruct->ut_type == USER_PROCESS) &&
+       (utmpstruct->ut_name[0] != '\0'))
+      numuser++;
+  }
+  endutent();
+
+  pos += sprintf(buf + pos, "%2d user%s, ", numuser, numuser == 1 ? "" : "s");
+
+  loadavg(&av[0], &av[1], &av[2]);
+
+  pos += sprintf(buf + pos, " load average: %.2f, %.2f, %.2f",
+		 av[0], av[1], av[2]);
+
+  return buf;
+}
+
+void print_uptime(void)
+{
+  printf("%s\n", sprint_uptime());
+}