diff options
Diffstat (limited to 'misc/sys')
| -rw-r--r-- | misc/sys/uio.h | 83 |
1 files changed, 76 insertions, 7 deletions
diff --git a/misc/sys/uio.h b/misc/sys/uio.h index 1b203f71c2..a3c782917a 100644 --- a/misc/sys/uio.h +++ b/misc/sys/uio.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 92, 96, 97, 98, 99, 2003 Free Software Foundation, Inc. +/* Copyright (C) 1991,1992,1996-1999,2003,2009 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -30,24 +30,93 @@ __BEGIN_DECLS /* Read data from file descriptor FD, and put the result in the - buffers described by IOVEC, which is a vector of COUNT `struct iovec's. + buffers described by IOVEC, which is a vector of COUNT 'struct iovec's. The buffers are filled in the order specified. - Operates just like `read' (see <unistd.h>) except that data are + Operates just like 'read' (see <unistd.h>) except that data are put in IOVEC instead of a contiguous buffer. This function is a cancellation point and therefore not marked with __THROW. */ -extern ssize_t readv (int __fd, __const struct iovec *__iovec, int __count); +extern ssize_t readv (int __fd, __const struct iovec *__iovec, int __count) + __wur; /* Write data pointed by the buffers described by IOVEC, which - is a vector of COUNT `struct iovec's, to file descriptor FD. + is a vector of COUNT 'struct iovec's, to file descriptor FD. The data is written in the order specified. - Operates just like `write' (see <unistd.h>) except that the data + Operates just like 'write' (see <unistd.h>) except that the data are taken from IOVEC instead of a contiguous buffer. This function is a cancellation point and therefore not marked with __THROW. */ -extern ssize_t writev (int __fd, __const struct iovec *__iovec, int __count); +extern ssize_t writev (int __fd, __const struct iovec *__iovec, int __count) + __wur; + + +#ifdef __USE_BSD +# ifndef __USE_FILE_OFFSET64 +/* Read data from file descriptor FD at the given position OFFSET + without change the file pointer, and put the result in the buffers + described by IOVEC, which is a vector of COUNT 'struct iovec's. + The buffers are filled in the order specified. Operates just like + 'read' (see <unistd.h>) except that data are put in IOVEC instead + of a contiguous buffer. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern ssize_t preadv (int __fd, __const struct iovec *__iovec, int __count, + __off_t __offset) __wur; + +/* Write data pointed by the buffers described by IOVEC, which is a + vector of COUNT 'struct iovec's, to file descriptor FD at the given + position OFFSET without change the file pointer. The data is + written in the order specified. Operates just like 'write' (see + <unistd.h>) except that the data are taken from IOVEC instead of a + contiguous buffer. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern ssize_t pwritev (int __fd, __const struct iovec *__iovec, int __count, + __off_t __offset) __wur; +# else +# ifdef __REDIRECT +extern ssize_t __REDIRECT (preadv, (int __fd, __const struct iovec *__iovec, + int __count, __off_t __offset), + preadv64) __wur; +extern ssize_t __REDIRECT (pwritev, (int __fd, __const struct iovec *__iovec, + int __count, __off_t __offset), + pwritev64) __wur; +# else +# define preadv preadv64 +# define pwritev pwritev64 +# endif +# endif + +# ifdef __USE_LARGEFILE64 +/* Read data from file descriptor FD at the given position OFFSET + without change the file pointer, and put the result in the buffers + described by IOVEC, which is a vector of COUNT 'struct iovec's. + The buffers are filled in the order specified. Operates just like + 'read' (see <unistd.h>) except that data are put in IOVEC instead + of a contiguous buffer. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern ssize_t preadv64 (int __fd, __const struct iovec *__iovec, int __count, + __off64_t __offset) __wur; + +/* Write data pointed by the buffers described by IOVEC, which is a + vector of COUNT 'struct iovec's, to file descriptor FD at the given + position OFFSET without change the file pointer. The data is + written in the order specified. Operates just like 'write' (see + <unistd.h>) except that the data are taken from IOVEC instead of a + contiguous buffer. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern ssize_t pwritev64 (int __fd, __const struct iovec *__iovec, int __count, + __off64_t __offset) __wur; +# endif +#endif /* Use BSD */ __END_DECLS |