BSD 4_3 release

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

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

#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    5.2 (Berkeley) 3/4/86";
#endif not lint

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

extern int errno;

main(argc, argv)
       int argc;
       char *argv[];
{
       int stat = 0;

       --argc, argv++;
       if (argc == 0) {
               fprintf(stderr, "usage: swapon name...\n");
               exit(1);
       }
       if (argc == 1 && !strcmp(*argv, "-a")) {
               struct  fstab   *fsp;
               if (setfsent() == 0)
                       perror(FSTAB), exit(1);
               while ( (fsp = getfsent()) != 0){
                       if (strcmp(fsp->fs_type, FSTAB_SW) != 0)
                               continue;
                       if (swapon(fsp->fs_spec) == -1) {
                               switch(errno) {
                               case EINVAL:
                                       fprintf(stderr,
                                               "%s: Device not configured\n",
                                               fsp->fs_spec);
                                       stat = 1;
                                       break;

                               case EBUSY:     /* ignore already in use */
                                       break;

                               default:
                                       perror(fsp->fs_spec);
                                       stat = 1;
                                       break;
                               }
                       } else
                               printf("Adding %s as swap device\n",
                                   fsp->fs_spec);
               }
               endfsent();
               exit(stat);
       }
       do {
               if (swapon(*argv++) == -1) {
                       stat = 1;
                       switch (errno) {
                       case EINVAL:
                               fprintf(stderr, "%s: Device not configured\n",
                                               argv[-1]);
                               break;

                       case EBUSY:
                               fprintf(stderr, "%s: Device already in use\n",
                                               argv[-1]);
                               break;

                       default:
                               perror(argv[-1]);
                               break;
                       }
               }
               argc--;
       } while (argc > 0);
       exit(stat);
}