1 files changed, 29 insertions, 11 deletions

diff --git a/procps/ps.c b/procps/ps.c
index aa004aa22..dc6fda61d 100644
--- a/procps/ps.c
+++ b/procps/ps.c
@@ -69,6 +69,31 @@
 /* Absolute maximum on output line length */
 enum { MAX_WIDTH = 2*1024 };
 
+#if ENABLE_FEATURE_PS_TIME || ENABLE_FEATURE_PS_LONG
+static long get_uptime(void)
+{
+#ifdef __linux__
+        struct sysinfo info;
+        if (sysinfo(&info) < 0)
+                return 0;
+        return info.uptime;
+#elif 1
+        char buf[64];
+        long uptime;
+        if (open_read_close("/proc/uptime", buf, sizeof(buf)) <= 0)
+                bb_perror_msg_and_die("can't read %s", "/proc/uptime");
+        buf[sizeof(buf)-1] = '\0';
+        sscanf(buf, "%l", &uptime);
+        return uptime;
+#else
+        struct timespec ts;
+        if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0)
+                return 0;
+        return ts.tv_sec;
+#endif
+}
+#endif
+
 #if ENABLE_DESKTOP
 
 #include <sys/times.h> /* for times() */
@@ -197,8 +222,6 @@ static inline unsigned get_HZ_by_waiting(void)
 
 static unsigned get_kernel_HZ(void)
 {
-        //char buf[64];
-        struct sysinfo info;
 
         if (kernel_HZ)
                 return kernel_HZ;
@@ -208,12 +231,7 @@ static unsigned get_kernel_HZ(void)
         if (kernel_HZ == (unsigned)-1)
                 kernel_HZ = get_HZ_by_waiting();
 
-        //if (open_read_close("/proc/uptime", buf, sizeof(buf)) <= 0)
-        //      bb_perror_msg_and_die("can't read %s", "/proc/uptime");
-        //buf[sizeof(buf)-1] = '\0';
-        ///sscanf(buf, "%llu", &seconds_since_boot);
-        sysinfo(&info);
-        seconds_since_boot = info.uptime;
+        seconds_since_boot = get_uptime();
 
         return kernel_HZ;
 }
@@ -645,7 +663,7 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
         };
 #if ENABLE_FEATURE_PS_LONG
         time_t now = now;
-        struct sysinfo info;
+        long uptime;
 #endif
         int opts = 0;
         /* If we support any options, parse argv */
@@ -705,7 +723,7 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
                 puts("S   UID   PID  PPID   VSZ   RSS TTY   STIME TIME     CMD");
 #if ENABLE_FEATURE_PS_LONG
                 now = time(NULL);
-                sysinfo(&info);
+                uptime = get_uptime();
 #endif
         }
         else {
@@ -737,7 +755,7 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
                                 char tty[2 * sizeof(int)*3 + 2];
                                 char *endp;
                                 unsigned sut = (p->stime + p->utime) / 100;
-                                unsigned elapsed = info.uptime - (p->start_time / 100);
+                                unsigned elapsed = uptime - (p->start_time / 100);
                                 time_t start = now - elapsed;
                                 struct tm *tm = localtime(&start);