Follow up patches want to be able to seek fd's.
Signed-off-by: Mike Frysinger <vap...@gentoo.org>
---
v2.1
- fix thinko in os_seek_xxx defines
arch/sandbox/cpu/os.c | 13 +++++++++++++
include/os.h | 15 +++++++++++++++
2 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 093e7dc..13331d2 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -45,6 +45,19 @@ ssize_t os_write(int fd, const void *buf, size_t count)
return write(fd, buf, count);
}
+off_t os_lseek(int fd, off_t offset, int whence)
+{
+ if (whence == OS_SEEK_SET)
+ whence = SEEK_SET;
+ else if (whence == OS_SEEK_CUR)
+ whence = SEEK_CUR;
+ else if (whence == OS_SEEK_END)
+ whence = SEEK_END;
+ else
+ printf("%s: invalid whence value %i\n", __func__, whence);
+ return lseek(fd, offset, whence);
+}
+
int os_open(const char *pathname, int flags)
{
return open(pathname, flags);
diff --git a/include/os.h b/include/os.h
index c17a8a5..f74766d 100644
--- a/include/os.h
+++ b/include/os.h
@@ -49,6 +49,21 @@ ssize_t os_read(int fd, void *buf, size_t count);
ssize_t os_write(int fd, const void *buf, size_t count);
/**
+ * Access to the OS lseek() system call
+ *
+ * \param fd File descriptor as returned by os_open()
+ * \param offset File offset (based on whence)
+ * \param whence Position offset is relative to (see below)
+ * \return new file offset
+ */
+off_t os_lseek(int fd, off_t offset, int whence);
+
+/* Defines for "whence" in os_lseek() */
+#define OS_SEEK_SET 0
+#define OS_SEEK_CUR 1
+#define OS_SEEK_END 2
+
+/**
* Access to the OS open() system call
*
* \param pathname Pathname of file to open
--
1.7.8.4
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