tst_safe_macros: add SAFE_DUP
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Acked-by: Jan Stancek <jstancek@redhat.com>
diff --git a/include/tst_safe_macros.h b/include/tst_safe_macros.h
index a213312..540fcb2 100644
--- a/include/tst_safe_macros.h
+++ b/include/tst_safe_macros.h
@@ -50,6 +50,22 @@
#define SAFE_DIRNAME(path) \
safe_dirname(__FILE__, __LINE__, NULL, (path))
+static inline int safe_dup(const char *file, const int lineno,
+ int oldfd)
+{
+ int rval;
+
+ rval = dup(oldfd);
+ if (rval == -1) {
+ tst_brk_(file, lineno, TBROK | TERRNO,
+ "dup(%i) failed", oldfd);
+ }
+
+ return rval;
+}
+#define SAFE_DUP(oldfd) \
+ safe_dup(__FILE__, __LINE__, (oldfd))
+
#define SAFE_GETCWD(buf, size) \
safe_getcwd(__FILE__, __LINE__, NULL, (buf), (size))