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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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3
winsup/cygwin/fhandler.h
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@ -116,6 +116,7 @@ class path_conv;
class fhandler_disk_file;
typedef struct __DIR DIR;
struct dirent;
struct iovec;
enum bg_check_types
{
@ -297,6 +298,8 @@ class fhandler_base
virtual char const * ttyname () { return get_name(); }
virtual int __stdcall read (void *ptr, size_t len) __attribute__ ((regparm (3)));
virtual int write (const void *ptr, size_t len);
virtual ssize_t readv (const struct iovec *, int iovcnt, ssize_t tot = -1);
virtual ssize_t writev (const struct iovec *, int iovcnt, ssize_t tot = -1);
virtual __off64_t lseek (__off64_t offset, int whence);
virtual int lock (int, struct flock *);
virtual void dump ();