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* miscfuncs.cc (check_iovec_for_read): Don't check buffer when zero length

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iov_len.
(check_iovec_for_write): Ditto.
* fhandler.h (fhandler_base::readv): New method.
(fhandler_base::writev): Ditto.
* fhandler.cc (fhandler_base::readv): New method.
(fhandler_base::writev): Ditto.
* syscalls.cc (_read): Delegate to readv(2).
(_write): Ditto, mutatis mutandi.
(readv): Rewrite, based on the old _read code, to use the new
fhandler_base::readv method.  Improve access mode handling and ensure all calls
reach the final strace statement.
(writev): Ditto, mutatis mutandi.
* include/sys/uio.h (struct iovec): Change field types to match SUSv3.
* winsup.h (check_iovec_for_read): New function.
(check_iovec_for_write): Ditto.
* miscfuncs.cc (check_iovec_for_read): Ditto.
(check_iovec_for_write): Ditto.
This commit is contained in:
Christopher Faylor
2002-08-30 15:47:10 +00:00
parent 70c306d781
commit ab7f9b938f
8 changed files with 288 additions and 130 deletions
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4
winsup/cygwin/winsup.h
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@ -221,6 +221,10 @@ int __stdcall __check_invalid_read_ptr_errno (const void *s, unsigned sz) __attr
#define check_null_invalid_struct_errno(s) \
__check_null_invalid_struct_errno ((s), sizeof (*(s)))
struct iovec;
ssize_t check_iovec_for_read (const struct iovec *, int) __attribute__ ((regparm(2)));
ssize_t check_iovec_for_write (const struct iovec *, int) __attribute__ ((regparm(2)));
#define set_winsock_errno() __set_winsock_errno (__FUNCTION__, __LINE__)
void __set_winsock_errno (const char *fn, int ln) __attribute__ ((regparm(2)));