BSD 4_3_Net_2 release

[unix-history] / usr / src / sbin / swapon / swapon.c

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)swapon.c    5.5 (Berkeley) 2/27/91";
#endif /* not lint */

#include <fstab.h>
#include <errno.h>
#include <stdio.h>

main(argc, argv)
       int argc;
       char **argv;
{
       extern char *optarg;
       extern int optind;
       register struct fstab *fsp;
       register int stat;
       int ch, doall;

       doall = 0;
       while ((ch = getopt(argc, argv, "a")) != EOF)
               switch((char)ch) {
               case 'a':
                       doall = 1;
                       break;
               case '?':
               default:
                       usage();
               }
       argv += optind;

       stat = 0;
       if (doall)
               while (fsp = getfsent()) {
                       if (strcmp(fsp->fs_type, FSTAB_SW))
                               continue;
                       if (add(fsp->fs_spec, 1))
                               stat = 1;
                       else
                               printf("swapon: adding %s as swap device\n",
                                   fsp->fs_spec);
               }
       else if (!*argv)
               usage();
       for (; *argv; ++argv)
               stat |= add(*argv, 0);
       exit(stat);
}

add(name, ignoreebusy)
       char *name;
       int ignoreebusy;
{
       extern int errno;

       if (swapon(name) == -1) {
               switch (errno) {
               case EINVAL:
                       fprintf(stderr, "swapon: %s: device not configured\n",
                           name);
                       break;
               case EBUSY:
                       if (!ignoreebusy)
                               fprintf(stderr,
                                   "swapon: %s: device already in use\n",
                                    name);
                       break;
               default:
                       fprintf(stderr, "swapon: %s: ", name);
                       perror((char *)NULL);
                       break;
               }
               return(1);
       }
       return(0);
}

usage()
{
       fprintf(stderr, "usage: swapon [-a] [special_file ...]\n");
       exit(1);
}