swapon.c revision 59216
1/* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static const char copyright[] = 36"@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41#if 0 42static char sccsid[] = "@(#)swapon.c 8.1 (Berkeley) 6/5/93"; 43#endif 44static const char rcsid[] = 45 "$FreeBSD: head/sbin/swapon/swapon.c 59216 2000-04-14 06:15:01Z imp $"; 46#endif /* not lint */ 47 48#include <err.h> 49#include <errno.h> 50#include <fstab.h> 51#include <stdio.h> 52#include <string.h> 53#include <unistd.h> 54 55static void usage __P((void)); 56int add __P((char *name, int ignoreebusy)); 57 58int 59main(int argc, char **argv) 60{ 61 register struct fstab *fsp; 62 register int stat; 63 int ch, doall; 64 65 doall = 0; 66 while ((ch = getopt(argc, argv, "a")) != -1) 67 switch((char)ch) { 68 case 'a': 69 doall = 1; 70 break; 71 case '?': 72 default: 73 usage(); 74 } 75 argv += optind; 76 77 stat = 0; 78 if (doall) 79 while ((fsp = getfsent()) != NULL) { 80 if (strcmp(fsp->fs_type, FSTAB_SW)) 81 continue; 82 if (strstr(fsp->fs_mntops, "noauto")) 83 continue; 84 if (add(fsp->fs_spec, 1)) 85 stat = 1; 86 else 87 printf("swapon: adding %s as swap device\n", 88 fsp->fs_spec); 89 } 90 else if (!*argv) 91 usage(); 92 for (; *argv; ++argv) 93 stat |= add(*argv, 0); 94 exit(stat); 95} 96 97int 98add(char *name, int ignoreebusy) 99{ 100 if (swapon(name) == -1) { 101 switch (errno) { 102 case EBUSY: 103 if (!ignoreebusy) 104 warnx("%s: device already in use", name); 105 break; 106 default: 107 warn("%s", name); 108 break; 109 } 110 return(1); 111 } 112 return(0); 113} 114 115static void 116usage() 117{ 118 fprintf(stderr, "usage: swapon [-a] [special_file ...]\n"); 119 exit(1); 120} 121