b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/* $NetBSD: vdprintf.c,v 1.1 2010/09/06 14:52:55 christos Exp $ */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: vdprintf.c,v 1.1 2010/09/06 14:52:55 christos Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <limits.h>
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#include "reentrant.h"
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#include "local.h"
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#ifdef __weak_alias
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__weak_alias(vdprintf,_vdprintf)
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#endif
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int
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vdprintf(int fd, const char * __restrict fmt, _BSD_VA_LIST_ ap)
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{
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FILE f;
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struct __sfileext fext;
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unsigned char buf[BUFSIZ];
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int ret, fdflags, tmp;
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_DIAGASSERT(fd != -1);
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/*
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* File descriptors are a full int, but _file is only a short.
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* If we get a valid file descriptor that is greater or equal to
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* USHRT_MAX, then the fd will get sign-extended into an
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* invalid file descriptor. Handle this case by failing the
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* open. (We treat the short as unsigned, and special-case -1).
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*/
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if (fd >= USHRT_MAX) {
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errno = EMFILE;
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return EOF;
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}
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if ((fdflags = fcntl(fd, F_GETFL, 0)) == -1)
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return EOF;
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tmp = fdflags & O_ACCMODE;
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if (tmp != O_RDWR && tmp != O_WRONLY) {
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errno = EINVAL;
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return EOF;
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}
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if (fdflags & O_NONBLOCK) {
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struct stat st;
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if (fstat(fd, &st) == -1)
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return -1;
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if (!S_ISREG(st.st_mode)) {
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errno = EFTYPE;
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return EOF;
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}
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}
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_FILEEXT_SETUP(&f, &fext);
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__sfpinit(&f);
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f._p = buf;
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f._w = sizeof(buf);
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f._flags = __SWR;
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f._file = fd;
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f._bf._base = buf;
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f._bf._size = sizeof(buf);
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f._cookie = &f;
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f._read = NULL;
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f._write = __swrite;
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f._seek = NULL;
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f._close = NULL;
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if ((ret = vfprintf(&f, fmt, ap)) < 0)
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return ret;
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return fflush(&f) ? EOF : ret;
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}
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