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Annotation of 42BSD/usr.lib/libpc/FNIL.c, revision 1.1

1.1     ! root        1: /* Copyright (c) 1979 Regents of the University of California */
        !             2: 
        !             3: static char sccsid[] = "@(#)FNIL.c 1.3 6/10/81";
        !             4: 
        !             5: #include "h00vars.h"
        !             6: 
        !             7: char *
        !             8: FNIL(curfile)
        !             9: 
        !            10:        register struct iorec   *curfile;
        !            11: {
        !            12:        if (curfile->fblk >= MAXFILES || _actfile[curfile->fblk] != curfile) {
        !            13:                ERROR("Reference to an inactive file\n", 0);
        !            14:                return;
        !            15:        }
        !            16:        if (curfile->funit & FDEF) {
        !            17:                ERROR("%s: Reference to an inactive file\n", curfile->pfname);
        !            18:                return;
        !            19:        }
        !            20:        if (curfile->funit & FREAD) {
        !            21:                IOSYNC(curfile);
        !            22:        }
        !            23:        return curfile->fileptr;
        !            24: }

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