From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001
From: Vladimir Azarov <avm@intermediate-node.net>
Date: Tue, 1 Oct 2024 15:47:05 +0200
Subject: Initial version

---
 src/time/__map_file.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 src/time/__map_file.c

(limited to 'src/time/__map_file.c')

diff --git a/src/time/__map_file.c b/src/time/__map_file.c
new file mode 100644
index 0000000..c2b29fe
--- /dev/null
+++ b/src/time/__map_file.c
@@ -0,0 +1,18 @@
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include "syscall.h"
+
+const char unsigned *__map_file(const char *pathname, size_t *size)
+{
+	struct stat st;
+	const unsigned char *map = MAP_FAILED;
+	int fd = sys_open(pathname, O_RDONLY|O_CLOEXEC|O_NONBLOCK);
+	if (fd < 0) return 0;
+	if (!__fstat(fd, &st)) {
+		map = __mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+		*size = st.st_size;
+	}
+	__syscall(SYS_close, fd);
+	return map == MAP_FAILED ? 0 : map;
+}
-- 
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