win32: Work around for dup2

Original dup2() does not return the fdto.

2 files changed, 9 insertions, 0 deletions

diff --git a/include/mingw.h b/include/mingw.h
index a828bd835..ed718fb5d 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -258,6 +258,7 @@ IMPL(strptime,char*,NULL,const char *s UNUSED_PARAM, const char *format UNUSED_P
 IMPL(alarm,unsigned int,0,unsigned int seconds UNUSED_PARAM);
 NOIMPL(chown,const char *path UNUSED_PARAM, uid_t uid UNUSED_PARAM, gid_t gid UNUSED_PARAM);
 NOIMPL(chroot,const char *root UNUSED_PARAM);
+int mingw_dup2 (int fd, int fdto);
 char *mingw_getcwd(char *pointer, int len);
 
 
@@ -293,6 +294,7 @@ static inline void sync(void) {}
 int mingw_unlink(const char *pathname);
 NOIMPL(vfork,void);
 
+#define dup2 mingw_dup2
 #define getcwd mingw_getcwd
 #define lchown(a,b,c) chown(a,b,c)
 #define open mingw_open
diff --git a/win32/mingw.c b/win32/mingw.c
index e8096b5bc..e4ff14357 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -149,6 +149,13 @@ FILE *mingw_fopen (const char *filename, const char *mode)
         return fopen(filename, mode);
 }
 
+#undef dup2
+int mingw_dup2 (int fd, int fdto)
+{
+        int ret = dup2(fd, fdto);
+        return ret != -1 ? fdto : -1;
+}
+
 static inline time_t filetime_to_time_t(const FILETIME *ft)
 {
         long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;