From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Frysinger Date: Fri, 3 Feb 2012 06:26:55 -0500 Subject: [U-Boot] [PATCH 1/5 v2.1] sandbox: add lseek helper In-Reply-To: <1328039614-10031-2-git-send-email-vapier@gentoo.org> References: <1328039614-10031-2-git-send-email-vapier@gentoo.org> Message-ID: <1328268415-29098-1-git-send-email-vapier@gentoo.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Follow up patches want to be able to seek fd's. Signed-off-by: Mike Frysinger --- 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