libc: Avoid redundant setting of ENOMEM

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/misc/dirent/opendir.c

@@ -110,7 +110,7 @@ DIR *opendir(const char *name)
 
 	if (!ptr) {
 		close_not_cancel_no_status(fd);
-		__set_errno(ENOMEM);
+		/* __set_errno(ENOMEM); */
 	}
 	return ptr;
 }

libc/stdlib/_atexit.c

@@ -257,7 +257,7 @@ struct exit_function attribute_hidden *__new_exitfn(void)
         efp = realloc(__exit_function_table,
                     (__exit_slots+20)*sizeof(struct exit_function));
         if (efp == NULL) {
-            __set_errno(ENOMEM);
+            /* __set_errno(ENOMEM); */
 	    goto DONE;
         }
         __exit_function_table = efp;

libc/stdlib/malloc-simple/alloc.c

@@ -42,8 +42,10 @@ void *malloc(size_t size)
 
 	result = mmap((void *) 0, size + sizeof(size_t), PROT_READ | PROT_WRITE,
 	              MMAP_FLAGS, 0, 0);
-	if (result == MAP_FAILED)
+	if (result == MAP_FAILED) {
+		__set_errno(ENOMEM);
 		return 0;
+	}
 	* (size_t *) result = size;
 	return(result + sizeof(size_t));
 }

libc/stdlib/malloc-standard/malloc.c

@@ -744,7 +744,7 @@ static void* __malloc_alloc(size_t nb, mstate av)
     }
 
     /* catch all failure paths */
-    errno = ENOMEM;
+    __set_errno(ENOMEM);
     return 0;
 }
 

libc/stdlib/malloc-standard/malloc.h

@@ -512,7 +512,7 @@ nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
 #define checked_request2size(req, sz)                             \
   if (REQUEST_OUT_OF_RANGE(req)) {                                \
-    errno = ENOMEM;                                               \
+    __set_errno(ENOMEM);                                          \
     return 0;                                                     \
   }                                                               \
   (sz) = request2size(req);

libc/stdlib/setenv.c

@@ -76,7 +76,7 @@ static int __add_to_environ(const char *name, const char *value,
 	/* We allocated this space; we can extend it.  */
 	new_environ = realloc(last_environ, (size + 2) * sizeof(char *));
 	if (new_environ == NULL) {
-		__set_errno(ENOMEM);
+		/* __set_errno(ENOMEM); */
 		goto DONE;
 	}
 	if (__environ != last_environ) {
@@ -97,7 +97,7 @@ static int __add_to_environ(const char *name, const char *value,
 
 		var_val = malloc(namelen + 1 + vallen);
 		if (var_val == NULL) {
-			__set_errno(ENOMEM);
+			/* __set_errno(ENOMEM); */
 			goto DONE;
 		}
 		memcpy(var_val, name, namelen);

libc/stdlib/unix_grantpt.c

@@ -68,7 +68,7 @@ pts_name (int fd, char **pts, size_t buf_len)
       if (! new_buf)
 	{
 	  rv = -1;
-	  errno = ENOMEM;
+	  /* __set_errno(ENOMEM); */
 	  break;
 	}
       buf = new_buf;

libc/string/_collate.c

@@ -367,7 +367,7 @@ static void next_weight(col_state_t *cs, int pass   __LOCALE_PARAM )
 						if (cs->back_buf == cs->ibb) { /* was using internal buffer */
 							cs->bp = malloc(cs->bb_size + 128);
 							if (!cs->bp) {
-								__set_errno(ENOMEM);
+								/* __set_errno(ENOMEM); */
 #ifdef __UCLIBC_MJN3_ONLY__
 #warning what to do here?
 #endif
@@ -379,7 +379,7 @@ static void next_weight(col_state_t *cs, int pass   __LOCALE_PARAM )
 						} else {
 							cs->bp = realloc(cs->back_buf, cs->bb_size + 128);
 							if (!cs->bp) {
-								__set_errno(ENOMEM);
+								/* __set_errno(ENOMEM); */
 #ifdef __UCLIBC_MJN3_ONLY__
 #warning what to do here?
 #endif