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Annotation of prex-old/usr/lib/libc/stdio/stdio.c, Revision 1.1.1.1

1.1       nbrk        1: /*-
                      2:  * Copyright (c) 1990, 1993
                      3:  *     The Regents of the University of California.  All rights reserved.
                      4:  *
                      5:  * This code is derived from software contributed to Berkeley by
                      6:  * Chris Torek.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. Neither the name of the University nor the names of its contributors
                     17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
                     33: #include <fcntl.h>
                     34: #include <unistd.h>
                     35: #include <stdio.h>
                     36: #include "local.h"
                     37:
                     38: /*
                     39:  * Small standard I/O/seek/close functions.
                     40:  * These maintain the `known seek offset' for seek optimisation.
                     41:  */
                     42: int
                     43: __sread(fp, buf, n)
                     44:        FILE *fp;
                     45:        char *buf;
                     46:        int n;
                     47: {
                     48:        return (read(fp->_file, buf, n));
                     49: }
                     50:
                     51: int
                     52: __swrite(fp, buf, n)
                     53:        FILE *fp;
                     54:        char const *buf;
                     55:        int n;
                     56: {
                     57:        if (fp->_flags & __SAPP)
                     58:                (void) lseek(fp->_file, (off_t)0, SEEK_END);
                     59:        return (write(fp->_file, buf, n));
                     60: }
                     61:
                     62: fpos_t
                     63: __sseek(fp, offset, whence)
                     64:        FILE *fp;
                     65:        fpos_t offset;
                     66:        int whence;
                     67: {
                     68:        return (lseek(fp->_file, (off_t)offset, whence));
                     69: }
                     70:
                     71: int
                     72: __sclose(fp)
                     73:        FILE *fp;
                     74: {
                     75:        return (close(fp->_file));
                     76: }