X-Git-Url: https://ruderich.org/simon/gitweb/?a=blobdiff_plain;f=src%2Fhookmacros.h;h=6f65d1e8e84ae86cd8974aea29fba3487201edd7;hb=30876b212cf0d143fcb7098b8968eb4f6c67c5a8;hp=9e1bd75fa6d60721bbf50a5709c14d5c9d38b46b;hpb=ad50ad9c54dea706b45d63dd5fdf1e381158f83f;p=coloredstderr%2Fcoloredstderr.git

diff --git a/src/hookmacros.h b/src/hookmacros.h
index 9e1bd75..6f65d1e 100644
--- a/src/hookmacros.h
+++ b/src/hookmacros.h
@@ -26,36 +26,40 @@
 
 #define _HOOK_PRE(type, name) \
         int handle; \
-        type result; \
+        int saved_errno = errno; \
         DLSYM_FUNCTION(real_ ## name, #name);
 #define _HOOK_PRE_FD(type, name, fd) \
+        type result; \
+        _HOOK_PRE_FD_(type, name, fd)
+#define _HOOK_PRE_FD_(type, name, fd) \
         _HOOK_PRE(type, name) \
-        _HOOK_PRE_FD_ALONE(type, name, fd)
-#define _HOOK_PRE_FD_ALONE(type, name, fd) \
         handle = check_handle_fd(fd); \
         if (handle) { \
             handle_fd_pre(fd, handle); \
-        }
+        } \
+        errno = saved_errno;
 #define _HOOK_PRE_FILE(type, name, file) \
+        type result; \
         _HOOK_PRE(type, name) \
         handle = check_handle_fd(fileno(file)); \
         if (handle) { \
             handle_file_pre(file, handle); \
-        }
+        } \
+        errno = saved_errno;
 /* Save and restore the errno to make sure we return the errno of the original
  * function call. */
-#define _HOOK_POST_FD_ALONE(fd) \
+#define _HOOK_POST_FD_(fd) \
         if (handle) { \
-            int saved_errno = errno; \
+            saved_errno = errno; \
             handle_fd_post(fd, handle); \
             errno = saved_errno; \
         }
 #define _HOOK_POST_FD(fd) \
-        _HOOK_POST_FD_ALONE(fd) \
+        _HOOK_POST_FD_(fd) \
         return result;
 #define _HOOK_POST_FILE(file) \
         if (handle) { \
-            int saved_errno = errno; \
+            saved_errno = errno; \
             handle_file_post(file, handle); \
             errno = saved_errno; \
         } \
@@ -65,11 +69,9 @@
 #define HOOK_VOID1(type, name, fd, type1, arg1) \
     static type (*real_ ## name)(type1); \
     type name(type1 arg1) { \
-        int handle; \
-        DLSYM_FUNCTION(real_ ## name, #name); \
-        _HOOK_PRE_FD_ALONE(type, name, fd) \
+        _HOOK_PRE_FD_(type, name, fd) \
         real_ ## name(arg1); \
-        _HOOK_POST_FD_ALONE(fd) \
+        _HOOK_POST_FD_(fd) \
     }
 
 #define HOOK_FD3(type, name, fd, type1, arg1, type2, arg2, type3, arg3) \