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Annotation of 43BSDReno/lib/libc/gen/getmntinfo.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1989 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: #if defined(LIBC_SCCS) && !defined(lint)
        !            21: static char sccsid[] = "@(#)getmntinfo.c       6.3 (Berkeley) 6/1/90";
        !            22: #endif /* LIBC_SCCS and not lint */
        !            23: 
        !            24: #include <sys/types.h>
        !            25: #include <sys/mount.h>
        !            26: 
        !            27: /*
        !            28:  * Return information about mounted filesystems.
        !            29:  */
        !            30: int
        !            31: getmntinfo(mntbufp, flags)
        !            32:        struct statfs **mntbufp;
        !            33:        int flags;
        !            34: {
        !            35:        static struct statfs *mntbuf;
        !            36:        static int mntsize, bufsize;
        !            37: 
        !            38:        if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) < 0)
        !            39:                return (0);
        !            40:        if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) < 0)
        !            41:                return (0);
        !            42:        while (bufsize <= mntsize * sizeof(struct statfs)) {
        !            43:                if (mntbuf)
        !            44:                        free(mntbuf);
        !            45:                bufsize = (mntsize + 1) * sizeof(struct statfs);
        !            46:                if ((mntbuf = (struct statfs *)malloc(bufsize)) == 0)
        !            47:                        return (0);
        !            48:                if ((mntsize = getfsstat(mntbuf, bufsize, flags)) < 0)
        !            49:                        return (0);
        !            50:        }
        !            51:        *mntbufp = mntbuf;
        !            52:        return (mntsize);
        !            53: }

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