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Annotation of 43BSDReno/lib/libpc/READ4.c, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1979 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)READ4.c    1.10 (Berkeley) 4/9/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: #include "h00vars.h"
        !            25: #include <errno.h>
        !            26: extern int errno;
        !            27: 
        !            28: long
        !            29: READ4(curfile)
        !            30: 
        !            31:        register struct iorec   *curfile;
        !            32: {
        !            33:        long                    data;
        !            34:        int                     retval;
        !            35: 
        !            36:        if (curfile->funit & FWRITE) {
        !            37:                ERROR("%s: Attempt to read, but open for writing\n",
        !            38:                        curfile->pfname);
        !            39:        }
        !            40:        UNSYNC(curfile);
        !            41:        errno = 0;
        !            42:        retval = fscanf(curfile->fbuf, "%ld", &data);
        !            43:        if (retval == EOF) {
        !            44:                ERROR("%s: Tried to read past end of file\n", curfile->pfname);
        !            45:        }
        !            46:        if (retval == 0) {
        !            47:                ERROR("%s: Bad data found on integer read\n", curfile->pfname);
        !            48:        }
        !            49:        if (errno == ERANGE) {
        !            50:                ERROR("%s: Overflow on integer read\n", curfile->pfname);
        !            51:        }
        !            52:        if (errno != 0) {
        !            53:                PERROR("Error encountered on integer read ", curfile->pfname);
        !            54:        }
        !            55:        return data;
        !            56: }

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