From 00a88c01dc20c33da1936600d46974d460a23cc4 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Wed, 8 Feb 2017 01:08:41 -0500
Subject: project: source tree: tidy up.

---
 src/helper/mdso_map_input.c | 62 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 src/helper/mdso_map_input.c

(limited to 'src/helper/mdso_map_input.c')

diff --git a/src/helper/mdso_map_input.c b/src/helper/mdso_map_input.c
new file mode 100644
index 0000000..77401f3
--- /dev/null
+++ b/src/helper/mdso_map_input.c
@@ -0,0 +1,62 @@
+/****************************************************************/
+/*  mdso: midipix dso scavenger                                 */
+/*  Copyright (C) 2015--2017  Z. Gilboa                         */
+/*  Released under GPLv2 and GPLv3; see COPYING.MDSO.           */
+/****************************************************************/
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <mdso/mdso.h>
+#include "mdso_errinfo_impl.h"
+
+int mdso_map_input(
+	const struct mdso_driver_ctx *	dctx,
+	int				fd,
+	const char *			path,
+	int				prot,
+	struct mdso_input *		map)
+{
+	struct stat	st;
+	bool		fnew;
+	int		ret;
+
+	if ((fnew = (fd < 0)))
+		fd  = open(path,O_RDONLY | O_CLOEXEC);
+
+	if (fd < 0)
+		return MDSO_SYSTEM_ERROR(dctx);
+
+	if ((ret = fstat(fd,&st) < 0) && fnew)
+		close(fd);
+
+	else if ((st.st_size == 0) && fnew)
+		close(fd);
+
+	if (ret < 0)
+		return MDSO_SYSTEM_ERROR(dctx);
+
+	else if (st.st_size == 0)
+		return MDSO_CUSTOM_ERROR(
+			dctx,MDSO_ERR_SOURCE_SIZE_ZERO);
+
+	map->size = st.st_size;
+	map->addr = mmap(0,map->size,prot,MAP_PRIVATE,fd,0);
+
+	if (fnew)
+		close(fd);
+
+	return (map->addr == MAP_FAILED)
+		? MDSO_SYSTEM_ERROR(dctx)
+		: 0;
+}
+
+int mdso_unmap_input(struct mdso_input * map)
+{
+	return munmap(map->addr,map->size);
+}
-- 
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