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Annotation of 43BSDReno/lib/libc/gen/getmntinfo.c, revision 1.1.1.1

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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