Uptime: detect boot time

src/detection/uptime/uptime.h

@@ -5,6 +5,12 @@
 
 #include "fastfetch.h"
 
-const char* ffDetectUptime(uint64_t* result);
+typedef struct FFUptimeResult
+{
+    uint64_t bootTime;
+    uint64_t uptime;
+} FFUptimeResult;
+
+const char* ffDetectUptime(FFUptimeResult* result);
 
 #endif

src/detection/uptime/uptime_bsd.c

@@ -4,18 +4,28 @@
 #include <sys/sysctl.h>
 #include <sys/time.h>
 
-const char* ffDetectUptime(uint64_t* result)
+const char* ffDetectUptime(FFUptimeResult* result)
 {
-    struct timeval bootTime;
-    size_t bootTimeSize = sizeof(bootTime);
-    if(sysctl(
-        (int[]) {CTL_KERN, KERN_BOOTTIME}, 2,
-        &bootTime, &bootTimeSize,
-        NULL, 0
-    ) != 0)
-        return "sysctl({CTL_KERN, KERN_BOOTTIME}) failed";
+    {
+        struct timeval bootTime;
+        size_t bootTimeSize = sizeof(bootTime);
+        if(sysctl(
+            (int[]) {CTL_KERN, KERN_BOOTTIME}, 2,
+            &bootTime, &bootTimeSize,
+            NULL, 0
+        ) != 0)
+            return "sysctl({CTL_KERN, KERN_BOOTTIME}) failed";
 
-    *result = (uint64_t) difftime(time(NULL), bootTime.tv_sec);
+        result->bootTime = (uint64_t) bootTime.tv_sec * 1000 + (uint64_t) bootTime.tv_usec / 1000;
+    }
+
+    {
+        struct timespec realTime;
+        if(clock_gettime(CLOCK_REALTIME, &realTime) != 0)
+            return "clock_gettime(CLOCK_REALTIME) failed";
+        uint64_t now = (uint64_t) realTime.tv_sec * 1000 + (uint64_t) realTime.tv_nsec / 1000000;
+        result->uptime = now - result->bootTime;
+    }
 
     return NULL;
 }

src/detection/uptime/uptime_linux.c

@@ -1,12 +1,20 @@
 #include "uptime.h"
 
-#include <sys/sysinfo.h>
+#include <time.h>
 
-const char* ffDetectUptime(uint64_t* result)
+const char* ffDetectUptime(FFUptimeResult* result)
 {
-    struct sysinfo info;
-    if(sysinfo(&info) != 0)
-        return "sysinfo() failed";
-    *result = (uint64_t) info.uptime;
+    struct timespec uptime;
+    if (clock_gettime(CLOCK_BOOTTIME, &uptime) != 0)
+        return "clock_gettime(CLOCK_BOOTTIME) failed";
+
+    result->uptime = (uint64_t) uptime.tv_sec * 1000 + (uint64_t) uptime.tv_nsec / 1000000;
+
+    struct timespec realTime;
+    if(clock_gettime(CLOCK_REALTIME, &realTime) != 0)
+        return "clock_gettime(CLOCK_REALTIME) failed";
+
+    result->bootTime = (uint64_t) realTime.tv_sec * 1000 + (uint64_t) realTime.tv_nsec / 1000000 + result->uptime;
+
     return NULL;
 }

src/detection/uptime/uptime_windows.c

@@ -2,8 +2,17 @@
 
 #include <sysinfoapi.h>
 
-const char* ffDetectUptime(uint64_t* result)
+static inline uint64_t to_ms(uint64_t ret)
 {
-    *result = GetTickCount64() / 1000;
+    ret -= 116444736000000000ull;
+    return ret / 10000ull;
+}
+
+const char* ffDetectUptime(FFUptimeResult* result)
+{
+    result->uptime = GetTickCount64();
+    FILETIME fileTime;
+    GetSystemTimeAsFileTime(&fileTime);
+    result->bootTime = to_ms(*(uint64_t*) &fileTime) - result->uptime;
     return NULL;
 }

src/detection/users/users_windows.c

@@ -4,7 +4,7 @@
 #include <windows.h>
 #include <wtsapi32.h>
 
-static uint64_t to_ms(uint64_t ret)
+static inline uint64_t to_ms(uint64_t ret)
 {
     ret -= 116444736000000000ull;
     return ret / 10000ull;