4.3BSD - /usr/src/etc/swapon.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: char copyright[] =
   9: "@(#) Copyright (c) 1980 Regents of the University of California.\n\
  10:  All rights reserved.\n";
  11: #endif not lint
  12: 
  13: #ifndef lint
  14: static char sccsid[] = "@(#)swapon.c	5.2 (Berkeley) 3/4/86";
  15: #endif not lint
  16: 
  17: #include <stdio.h>
  18: #include <fstab.h>
  19: #include <errno.h>
  20: 
  21: extern int errno;
  22: 
  23: main(argc, argv)
  24:     int argc;
  25:     char *argv[];
  26: {
  27:     int stat = 0;
  28: 
  29:     --argc, argv++;
  30:     if (argc == 0) {
  31:         fprintf(stderr, "usage: swapon name...\n");
  32:         exit(1);
  33:     }
  34:     if (argc == 1 && !strcmp(*argv, "-a")) {
  35:         struct  fstab   *fsp;
  36:         if (setfsent() == 0)
  37:             perror(FSTAB), exit(1);
  38:         while ( (fsp = getfsent()) != 0){
  39:             if (strcmp(fsp->fs_type, FSTAB_SW) != 0)
  40:                 continue;
  41:             if (swapon(fsp->fs_spec) == -1) {
  42:                 switch(errno) {
  43:                 case EINVAL:
  44:                     fprintf(stderr,
  45:                         "%s: Device not configured\n",
  46:                         fsp->fs_spec);
  47:                     stat = 1;
  48:                     break;
  49: 
  50:                 case EBUSY: /* ignore already in use */
  51:                     break;
  52: 
  53:                 default:
  54:                     perror(fsp->fs_spec);
  55:                     stat = 1;
  56:                     break;
  57:                 }
  58:             } else
  59:                 printf("Adding %s as swap device\n",
  60:                     fsp->fs_spec);
  61:         }
  62:         endfsent();
  63:         exit(stat);
  64:     }
  65:     do {
  66:         if (swapon(*argv++) == -1) {
  67:             stat = 1;
  68:             switch (errno) {
  69:             case EINVAL:
  70:                 fprintf(stderr, "%s: Device not configured\n",
  71:                         argv[-1]);
  72:                 break;
  73: 
  74:             case EBUSY:
  75:                 fprintf(stderr, "%s: Device already in use\n",
  76:                         argv[-1]);
  77:                 break;
  78: 
  79:             default:
  80:                 perror(argv[-1]);
  81:                 break;
  82:             }
  83:         }
  84:         argc--;
  85:     } while (argc > 0);
  86:     exit(stat);
  87: }

Defined functions

Defined variables