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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libiberty/rename.c
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Diffstat (limited to 'libiberty/rename.c')
-rw-r--r--libiberty/rename.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/libiberty/rename.c b/libiberty/rename.c
new file mode 100644
index 000000000..ad342ffca
--- /dev/null
+++ b/libiberty/rename.c
@@ -0,0 +1,36 @@
+/* rename -- rename a file
+ This function is in the public domain. */
+
+/*
+
+@deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new})
+
+Renames a file from @var{old} to @var{new}. If @var{new} already
+exists, it is removed.
+
+@end deftypefn
+
+*/
+
+#include "ansidecl.h"
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <errno.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+int
+rename (const char *zfrom, const char *zto)
+{
+ if (link (zfrom, zto) < 0)
+ {
+ if (errno != EEXIST)
+ return -1;
+ if (unlink (zto) < 0
+ || link (zfrom, zto) < 0)
+ return -1;
+ }
+ return unlink (zfrom);
+}