bcaad6ee58
* csu/munch-tmpl.c (__libc_init): Remove K&R support. * dirent/scandir64.c: Likewise. * pwd/getpw.c: Likewise. * stdlib/bsearch.c (bsearch): Likewise. * stdlib/tst-strtoll.c: Likewise. * localedata/collate-test.c: Likewise. * localedata/xfrm-test.c: Likewise. * posix/bsd-getpgrp.c: Likewise. * sysdeps/alpha/fpu/bits/fenv.h: Likewise. * sysdeps/generic/bits/siginfo.h: Likewise. * sysdeps/generic/bits/sockaddr.h: Likewise. * sysdeps/generic/sys/swap.h: Likewise. * sysdeps/generic/sys/sysinfo.h: Likewise. * sysdeps/generic/vfork.c: Likewise. * sysdeps/m68k/fpu/switch/68881-sw.h: Likewise. * sysdeps/mach/hurd/fdopen.c: Likewise. * sysdeps/unix/sysv/linux/alpha/sys/acct.h: Likewise. * sysdeps/unix/sysv/linux/poll.c: Likewise. * sysdeps/unix/sysv/linux/readv.c: Likewise. * sysdeps/unix/sysv/linux/writev.c: Likewise. * sysdeps/unix/sysv/linux/i386/setgroups.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/bits/ipc.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise. * misc/tst-dirname.c: Remove K&R support, use ANSI C prototypes. * shadow/lckpwdf.c: Likewise. * stdlib/tst-strtol.c: Likewise. * sysdeps/generic/tcsetattr.c: Likewise. * sysdeps/unix/sysv/linux/ttyname.c: Likewise. * sysdeps/unix/sysv/linux/ttyname_r.c: Likewise.
64 lines
2 KiB
C
64 lines
2 KiB
C
/* readv supports all Linux kernels >= 2.0.
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Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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read to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <stddef.h>
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#include <sys/param.h>
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#include <sys/uio.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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extern ssize_t __syscall_readv (int, __const struct iovec *, int);
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static ssize_t __atomic_readv_replacement (int, __const struct iovec *,
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int) internal_function;
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/* Not all versions of the kernel support the large number of records. */
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#ifndef UIO_FASTIOV
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# define UIO_FASTIOV 8 /* 8 is a safe number. */
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#endif
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/* We should deal with kernel which have a smaller UIO_FASTIOV as well
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as a very big count. */
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ssize_t
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__readv (fd, vector, count)
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int fd;
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const struct iovec *vector;
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int count;
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{
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int errno_saved = errno;
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ssize_t bytes_read;
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bytes_read = INLINE_SYSCALL (readv, 3, fd, vector, count);
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if (bytes_read >= 0 || errno != EINVAL || count <= UIO_FASTIOV)
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return bytes_read;
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/* Restore the old error value as if nothing happened. */
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__set_errno (errno_saved);
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return __atomic_readv_replacement (fd, vector, count);
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}
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weak_alias (__readv, readv)
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#define __readv static internal_function __atomic_readv_replacement
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#include <sysdeps/posix/readv.c>
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