1 /* $NetBSD: mkswap.c,v 1.7 2009/01/20 18:20:48 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratories. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: @(#)mkswap.c 8.1 (Berkeley) 6/6/93 41 */ 42 43 #if HAVE_NBTOOL_CONFIG_H 44 #include "nbtool_config.h" 45 #endif 46 47 #include <sys/param.h> 48 #include <errno.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <err.h> 53 #include "defs.h" 54 #include "sem.h" 55 56 static char *mkdevstr(dev_t); 57 static int mkoneswap(struct config *); 58 59 /* 60 * Make the various swap*.c files. Nothing to do for generic swap. 61 */ 62 int 63 mkswap(void) 64 { 65 struct config *cf; 66 67 TAILQ_FOREACH(cf, &allcf, cf_next) { 68 if (mkoneswap(cf)) 69 return (1); 70 } 71 return (0); 72 } 73 74 static char * 75 mkdevstr(dev_t d) 76 { 77 static char buf[32]; 78 79 if (d == NODEV) 80 (void)snprintf(buf, sizeof(buf), "NODEV"); 81 else 82 (void)snprintf(buf, sizeof(buf), "makedev(%d, %d)", 83 major(d), minor(d)); 84 return buf; 85 } 86 87 static int 88 mkoneswap(struct config *cf) 89 { 90 struct nvlist *nv; 91 FILE *fp; 92 char fname[200], tname[200]; 93 char specinfo[200]; 94 95 (void)snprintf(fname, sizeof(fname), "swap%s.c", cf->cf_name); 96 (void)snprintf(tname, sizeof(tname), "swap%s.c.tmp", cf->cf_name); 97 if ((fp = fopen(tname, "w")) == NULL) { 98 warn("cannot open %s", fname); 99 return (1); 100 } 101 102 autogen_comment(fp, fname); 103 104 fputs("#include <sys/param.h>\n" 105 "#include <sys/conf.h>\n\n", fp); 106 /* 107 * Emit the root device. 108 */ 109 nv = cf->cf_root; 110 if (cf->cf_root->nv_str == s_qmark) 111 strlcpy(specinfo, "NULL", sizeof(specinfo)); 112 else 113 snprintf(specinfo, sizeof(specinfo), "\"%s\"", 114 cf->cf_root->nv_str); 115 fprintf(fp, "const char *rootspec = %s;\n", specinfo); 116 fprintf(fp, "dev_t\trootdev = %s;\t/* %s */\n\n", 117 mkdevstr(nv->nv_num), 118 nv->nv_str == s_qmark ? "wildcarded" : nv->nv_str); 119 120 /* 121 * Emit the dump device. 122 */ 123 nv = cf->cf_dump; 124 if (cf->cf_dump == NULL) 125 strlcpy(specinfo, "NULL", sizeof(specinfo)); 126 else 127 snprintf(specinfo, sizeof(specinfo), "\"%s\"", cf->cf_dump->nv_str); 128 fprintf(fp, "const char *dumpspec = %s;\n", specinfo); 129 fprintf(fp, "dev_t\tdumpdev = %s;\t/* %s */\n\n", 130 nv ? mkdevstr(nv->nv_num) : "NODEV", 131 nv ? nv->nv_str : "unspecified"); 132 133 /* 134 * Emit the root file system. 135 */ 136 fprintf(fp, "const char *rootfstype = \"%s\";\n", 137 cf->cf_fstype ? cf->cf_fstype : "?"); 138 139 fflush(fp); 140 if (ferror(fp)) 141 goto wrerror; 142 143 if (fclose(fp)) { 144 fp = NULL; 145 goto wrerror; 146 } 147 if (moveifchanged(tname, fname) != 0) { 148 warn("error renaming %s", fname); 149 return (1); 150 } 151 return (0); 152 153 wrerror: 154 warn("error writing %s", fname); 155 if (fp != NULL) 156 (void)fclose(fp); 157 #if 0 158 (void)unlink(fname); 159 #endif 160 return (1); 161 } 162