document -F flag

[unix-history] / usr / src / old / mount_lofs / mount_lofs.c

/*
* Copyright (c) 1992 The Regents of the University of California
* Copyright (c) 1990, 1992 Jan-Simon Pendry
* All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* %sccs.include.redist.c%
*
*      @(#)mount_lofs.c        5.2 (Berkeley) %G%
*/

#include <sys/param.h>
#include <sys/mount.h>
#include <lofs/lofs.h>

#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

void usage __P((void));

int
main(argc, argv)
       int argc;
       char *argv[];
{
       struct lofs_args args;
       int ch, mntflags;

       mntflags = 0;
       while ((ch = getopt(argc, argv, "F:")) != EOF)
               switch(ch) {
               case 'F':
                       mntflags = atoi(optarg);
                       break;
               case '?':
               default:
                       usage();
               }
       argc -= optind;
       argv += optind;

       if (argc != 2)
               usage();

       args.target = argv[0];

       if (mount(MOUNT_LOFS, argv[1], mntflags, &args)) {
               (void)fprintf(stderr, "mount_lofs: %s\n", strerror(errno));
               exit(1);
       }
       exit(0);
}

void
usage()
{
       (void)fprintf(stderr,
           "usage: mount_lofs [ -F fsoptions ] target_fs mount_point\n");
       exit(1);
}