diff options
| -rw-r--r-- | arch/sandbox/cpu/os.c | 13 | ||||
| -rw-r--r-- | 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..f6d0e84 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 + os_exit(1); + 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 |