From 119147ebfd2827558b6d27e525c2d8da6bf2865a Mon Sep 17 00:00:00 2001
From: Philipp Zabel
Date: Thu, 1 Feb 2018 11:37:16 +0100
Subject: filetype: Add type detection at an offset
Add file_name_detect_type_offset to allow file system detection for loop
mounts at an offset.
Signed-off-by: Philipp Zabel
Signed-off-by: Sascha Hauer
---
common/filetype.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
(limited to 'common/filetype.c')
diff --git a/common/filetype.c b/common/filetype.c
index f9c034ff2a..71691fd813 100644
--- a/common/filetype.c
+++ b/common/filetype.c
@@ -21,6 +21,7 @@
#include
#include
#include
+#include
#include
#include
#include
@@ -343,13 +344,13 @@ enum filetype file_detect_type(const void *_buf, size_t bufsize)
return filetype_unknown;
}
-enum filetype file_name_detect_type(const char *filename)
+enum filetype file_name_detect_type_offset(const char *filename, loff_t pos)
{
int fd, ret;
void *buf;
enum filetype type = filetype_unknown;
- fd = open(filename, O_RDONLY);
+ fd = open_and_lseek(filename, O_RDONLY, pos);
if (fd < 0)
return fd;
@@ -368,6 +369,11 @@ err_out:
return type;
}
+enum filetype file_name_detect_type(const char *filename)
+{
+ return file_name_detect_type_offset(filename, 0);
+}
+
enum filetype cdev_detect_type(const char *name)
{
enum filetype type = filetype_unknown;
--
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