diff options
Diffstat (limited to 'lib/libpthread/stdio/stdio.c')
| -rw-r--r-- | lib/libpthread/stdio/stdio.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/lib/libpthread/stdio/stdio.c b/lib/libpthread/stdio/stdio.c new file mode 100644 index 000000000000..41f2d2519edc --- /dev/null +++ b/lib/libpthread/stdio/stdio.c @@ -0,0 +1,92 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +/*static char *sccsid = "from: @(#)stdio.c 5.3 (Berkeley) 2/24/91";*/ +static char *rcsid = "$Id: stdio.c,v 1.1 1994/01/30 04:25:45 proven Exp $"; +#endif /* LIBC_SCCS and not lint */ + +#include <pthread.h> +#include <fcntl.h> +#include <unistd.h> +#include <stdio.h> +#include "local.h" + +/* + * Small standard I/O/seek/close functions. + * These maintain the `known seek offset' for seek optimisation. + */ +int __sread(FILE *fp, char *buf, int n) +{ + register int ret; + + /* if the read succeeded, update the current offset */ + if ((ret = fd_table[fp->_file]->ops->read(fd_table[fp->_file]->fd, + fd_table[fp->_file]->flags, buf, n)) >= 0) { + fp->_offset += ret; + } else { + fp->_flags &= ~__SOFF; /* paranoia */ + } + return (ret); +} + +int __swrite(FILE *fp, const char *buf, int n) +{ + if (fp->_flags & __SAPP) + (void) lseek(fp->_file, (off_t)0, SEEK_END); + fp->_flags &= ~__SOFF; /* in case FAPPEND mode is set */ + return(fd_table[fp->_file]->ops->write(fd_table[fp->_file]->fd, + fd_table[fp->_file]->flags, buf, n)); +} + +fpos_t __sseek(FILE *fp, fpos_t offset, int whence) +{ + register off_t ret; + + ret = lseek(fp->_file, (off_t)offset, whence); + if (ret == -1L) + fp->_flags &= ~__SOFF; + else { + fp->_flags |= __SOFF; + fp->_offset = ret; + } + return (ret); +} + +int __sclose(FILE *fp) +{ + return (close(fp->_file)); +} |