diff --git a/include/os/os.h b/include/os/os.h
index ac1a750b78..1749687d97 100644
--- a/include/os/os.h
+++ b/include/os/os.h
@@ -97,6 +97,7 @@ extern "C" {
 #include <nmmintrin.h>
 #endif
 
+
 #include "osThread.h"
 
 #include "osAtomic.h"
diff --git a/include/os/osTime.h b/include/os/osTime.h
index 87df3a2650..c367416175 100644
--- a/include/os/osTime.h
+++ b/include/os/osTime.h
@@ -65,28 +65,28 @@ int32_t taosGetTimestampSec();
 //@return timestamp in millisecond
 static FORCE_INLINE int64_t taosGetTimestampMs() {
   struct timeval systemTime;
-  taosGetTimeOfDay(&systemTime);
+  (void)taosGetTimeOfDay(&systemTime);
   return (int64_t)systemTime.tv_sec * 1000LL + (int64_t)systemTime.tv_usec / 1000;
 }
 
 //@return timestamp in microsecond
 static FORCE_INLINE int64_t taosGetTimestampUs() {
   struct timeval systemTime;
-  taosGetTimeOfDay(&systemTime);
+  (void)taosGetTimeOfDay(&systemTime);
   return (int64_t)systemTime.tv_sec * 1000000LL + (int64_t)systemTime.tv_usec;
 }
 
 //@return timestamp in nanosecond
 static FORCE_INLINE int64_t taosGetTimestampNs() {
   struct timespec systemTime = {0};
-  taosClockGetTime(CLOCK_REALTIME, &systemTime);
+  (void)taosClockGetTime(CLOCK_REALTIME, &systemTime);
   return (int64_t)systemTime.tv_sec * 1000000000LL + (int64_t)systemTime.tv_nsec;
 }
 
 //@return timestamp of monotonic clock in millisecond
 static FORCE_INLINE int64_t taosGetMonoTimestampMs() {
   struct timespec systemTime = {0};
-  taosClockGetTime(CLOCK_MONOTONIC, &systemTime);
+  (void)taosClockGetTime(CLOCK_MONOTONIC, &systemTime);
   return (int64_t)systemTime.tv_sec * 1000LL + (int64_t)systemTime.tv_nsec / 1000000;
 }
 
diff --git a/source/os/src/osDir.c b/source/os/src/osDir.c
index 667c3c146a..4348629467 100644
--- a/source/os/src/osDir.c
+++ b/source/os/src/osDir.c
@@ -44,7 +44,7 @@ int wordexp(char *words, wordexp_t *pwordexp, int flags) {
   pwordexp->we_wordc = 1;
   pwordexp->we_wordv[0] = pwordexp->wordPos;
 
-  memset(pwordexp->wordPos, 0, 1025);
+  (void)memset(pwordexp->wordPos, 0, 1025);
   if (_fullpath(pwordexp->wordPos, words, 1024) == NULL) {
     pwordexp->we_wordv[0] = words;
     printf("failed to parse relative path:%s to abs path\n", words);
@@ -100,7 +100,7 @@ void taosRemoveDir(const char *dirname) {
     if (strcmp(taosGetDirEntryName(de), ".") == 0 || strcmp(taosGetDirEntryName(de), "..") == 0) continue;
 
     char filename[1024] = {0};
-    snprintf(filename, sizeof(filename), "%s%s%s", dirname, TD_DIRSEP, taosGetDirEntryName(de));
+    (void)snprintf(filename, sizeof(filename), "%s%s%s", dirname, TD_DIRSEP, taosGetDirEntryName(de));
     if (taosDirEntryIsDir(de)) {
       taosRemoveDir(filename);
     } else {
@@ -110,7 +110,7 @@ void taosRemoveDir(const char *dirname) {
   }
 
   taosCloseDir(&pDir);
-  rmdir(dirname);
+  (void)rmdir(dirname);
 
   // printf("dir:%s is removed\n", dirname);
   return;
diff --git a/source/os/src/osMemory.c b/source/os/src/osMemory.c
index d130ebe469..3e49808dad 100644
--- a/source/os/src/osMemory.c
+++ b/source/os/src/osMemory.c
@@ -186,7 +186,7 @@ static void print_line(Dwarf_Debug dbg, Dwarf_Line line, Dwarf_Addr pc) {
     dwarf_linesrc(line, &linesrc, NULL);
     dwarf_lineno(line, &lineno, NULL);
   }
-  printf("BackTrace %08" PRId64 " %s:%" DW_PR_DUu "\n", taosGetSelfPthreadId(), linesrc, lineno);
+  (void)printf("BackTrace %08" PRId64 " %s:%" DW_PR_DUu "\n", taosGetSelfPthreadId(), linesrc, lineno);
   if (line) dwarf_dealloc(dbg, linesrc, DW_DLA_STRING);
 }
 void taosPrintBackTrace() {
@@ -266,7 +266,11 @@ void *taosMemoryMalloc(int64_t size) {
 
   return (char *)tmp + sizeof(TdMemoryInfo);
 #else
-  return malloc(size);
+  void* p = malloc(size);
+  if (NULL == p) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+  }
+  return p;
 #endif
 }
 
@@ -283,7 +287,11 @@ void *taosMemoryCalloc(int64_t num, int64_t size) {
 
   return (char *)tmp + sizeof(TdMemoryInfo);
 #else
-  return calloc(num, size);
+  void* p = calloc(num, size);
+  if (NULL == p) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+  }
+  return p;
 #endif
 }
 
@@ -309,7 +317,11 @@ void *taosMemoryRealloc(void *ptr, int64_t size) {
 
   return (char *)tmp + sizeof(TdMemoryInfo);
 #else
-  return realloc(ptr, size);
+  void* p = realloc(ptr, size);
+  if (size > 0 && NULL == p) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+  }
+  return p;
 #endif
 }
 
@@ -330,7 +342,12 @@ char *taosStrdup(const char *ptr) {
 
   return (char *)tmp + sizeof(TdMemoryInfo);
 #else
-  return tstrdup(ptr);
+  char* p = tstrdup(ptr);
+  if (ptr != NULL && NULL == p) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+  }
+  return p;
+  
 #endif
 }
 
@@ -357,8 +374,7 @@ int64_t taosMemorySize(void *ptr) {
   TdMemoryInfoPtr pTdMemoryInfo = (TdMemoryInfoPtr)((char *)ptr - sizeof(TdMemoryInfo));
   ASSERT(pTdMemoryInfo->symbol == TD_MEMORY_SYMBOL);
   if (pTdMemoryInfo->symbol != TD_MEMORY_SYMBOL) {
-    +return NULL;
-    +
+    return NULL;
   }
 
   return pTdMemoryInfo->memorySize;
@@ -378,7 +394,7 @@ void taosMemoryTrim(int32_t size) {
   // do nothing
   return;
 #else
-  malloc_trim(size);
+  (void)malloc_trim(size);
 #endif
 }
 
@@ -388,6 +404,13 @@ void *taosMemoryMallocAlign(uint32_t alignment, int64_t size) {
 #else
 #if defined(LINUX)
   void *p = memalign(alignment, size);
+  if (NULL == p) {
+    if (ENOMEM == errno) {
+      terrno = TSDB_CODE_OUT_OF_MEMORY;
+    } else {
+      terrno = TAOS_SYSTEM_ERROR(errno);
+    }
+  }
   return p;
 #else
   return taosMemoryMalloc(size);
diff --git a/source/os/src/osRand.c b/source/os/src/osRand.c
index 0e58b7a8ec..da4e8dfb9d 100644
--- a/source/os/src/osRand.c
+++ b/source/os/src/osRand.c
@@ -69,7 +69,7 @@ uint32_t taosSafeRand(void) {
     if (len < 0) {
       seed = (int)taosGetTimestampSec();
     }
-    taosCloseFile(&pFile);
+    (void)taosCloseFile(&pFile);
   }
 
   return (uint32_t)seed;
diff --git a/source/os/src/osTime.c b/source/os/src/osTime.c
index 9cad1dd6ef..c650ac989d 100644
--- a/source/os/src/osTime.c
+++ b/source/os/src/osTime.c
@@ -345,6 +345,7 @@ char *taosStrpTime(const char *buf, const char *fmt, struct tm *tm) {
 }
 
 int32_t taosGetTimeOfDay(struct timeval *tv) {
+  int32_t code = 0;
 #ifdef WINDOWS
   LARGE_INTEGER t;
   FILETIME      f;
@@ -359,11 +360,18 @@ int32_t taosGetTimeOfDay(struct timeval *tv) {
   tv->tv_usec = (t.QuadPart % 10000000) / 10;
   return 0;
 #else
-  return gettimeofday(tv, NULL);
+  code = gettimeofday(tv, NULL);
+  return (-1 == code) ? (terrno = TAOS_SYSTEM_ERROR(errno)) : 0;
 #endif
 }
 
-time_t taosTime(time_t *t) { return time(t); }
+time_t taosTime(time_t *t) { 
+  time_t r = time(t); 
+  if (r == (time_t)-1) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+  }
+  return r;
+}
 
 /*
  * mktime64 - Converts date to seconds.
@@ -458,7 +466,11 @@ time_t taosMktime(struct tm *timep) {
                        timep->tm_sec, tz);
 #endif
 #else
-  return mktime(timep);
+  time_t r = mktime(timep);
+  if (r == (time_t)-1) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+  }
+  return r;
 #endif
 }
 
@@ -470,7 +482,7 @@ struct tm *taosLocalTime(const time_t *timep, struct tm *result, char *buf) {
   if (result == NULL) {
     res = localtime(timep);
     if (res == NULL && buf != NULL) {
-      sprintf(buf, "NaN");
+      (void)sprintf(buf, "NaN");
     }
     return res;
   }
@@ -528,7 +540,7 @@ struct tm *taosLocalTime(const time_t *timep, struct tm *result, char *buf) {
 #else
   res = localtime_r(timep, result);
   if (res == NULL && buf != NULL) {
-    sprintf(buf, "NaN");
+    (void)sprintf(buf, "NaN");
   }
 #endif
   return result;
@@ -642,6 +654,7 @@ struct tm *taosLocalTimeNolock(struct tm *result, const time_t *timep, int dst)
 int32_t taosGetTimestampSec() { return (int32_t)time(NULL); }
 
 int32_t taosClockGetTime(int clock_id, struct timespec *pTS) {
+  int32_t code = 0;
 #ifdef WINDOWS
   LARGE_INTEGER        t;
   FILETIME             f;
@@ -656,6 +669,7 @@ int32_t taosClockGetTime(int clock_id, struct timespec *pTS) {
   pTS->tv_nsec = (t.QuadPart % 10000000) * 100;
   return (0);
 #else
-  return clock_gettime(clock_id, pTS);
+  code = clock_gettime(clock_id, pTS);
+  return (-1 == code) ? (terrno = TAOS_SYSTEM_ERROR(errno)) : 0;
 #endif
 }