1 /* $OpenBSD: ukc.c,v 1.5 2001/02/04 20:42:12 maja Exp $ */ 2 3 /* 4 * Copyright (c) 1999-2001 Mats O Jansson. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Mats O Jansson. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef LINT 33 static char rcsid[] = "$OpenBSD: ukc.c,v 1.5 2001/02/04 20:42:12 maja Exp $"; 34 #endif 35 36 #include <sys/types.h> 37 #include <sys/device.h> 38 #include <sys/ioctl.h> 39 40 #include <err.h> 41 #include <kvm.h> 42 #include <fcntl.h> 43 #include <limits.h> 44 #include <nlist.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 #define UKC_MAIN 51 #include "ukc.h" 52 #include "exec.h" 53 54 void init __P((void)); 55 void usage __P((void)); 56 57 int ukc_mod_kernel = 0; 58 59 int 60 ukc(file, outfile, uflag, force) 61 char *file; 62 char *outfile; 63 int uflag; 64 int force; 65 { 66 extern char *__progname; 67 int ret, i; 68 kvm_t *kd; 69 char errbuf[_POSIX2_LINE_MAX]; 70 int histlen = 0, ok = 1; 71 char history[1024], kversion[1024]; 72 73 if (file == NULL) { 74 fprintf(stderr, "%s: no file specified\n", __progname); 75 usage(); 76 } 77 78 loadkernel(file); 79 80 ret = nlist(file, nl); 81 82 if (uflag) { 83 84 if ((kd = kvm_openfiles(NULL,NULL,NULL,O_RDONLY, errbuf)) == 0) 85 errx(1, "kvm_openfiles: %s", errbuf); 86 87 if ((ret = kvm_nlist(kd, knl)) == -1) 88 errx(1, "kvm_nlist: %s", kvm_geterr(kd)); 89 90 i = 0; 91 while (i < NLENTRIES) { 92 if ((nl[i].n_type != knl[i].n_type) || 93 (nl[i].n_desc != knl[i].n_desc) || 94 (nl[i].n_value != knl[i].n_value)) 95 ok = 0; 96 i++; 97 } 98 99 if ((knl[I_HISTLEN].n_type != 0) && ok) { 100 if (kvm_read(kd, knl[I_HISTLEN].n_value, &histlen, 101 sizeof(histlen)) != sizeof(histlen)) 102 warnx("cannot read %s: %s", 103 knl[I_HISTLEN].n_name, 104 kvm_geterr(kd)); 105 } 106 if ((knl[CA_HISTORY].n_type != 0) && ok) { 107 if (kvm_read(kd, knl[CA_HISTORY].n_value, history, 108 sizeof(history)) != sizeof(history)) 109 warnx("cannot read %s: %s", 110 knl[CA_HISTORY].n_name, 111 kvm_geterr(kd)); 112 } 113 if ((knl[P_VERSION].n_type != 0) && ok) { 114 if (kvm_read(kd, knl[P_VERSION].n_value, kversion, 115 sizeof(kversion)) != sizeof(kversion)) 116 warnx("cannot read %s: %s", 117 knl[P_VERSION].n_name, 118 kvm_geterr(kd)); 119 } 120 } 121 122 printf("%s", adjust((caddr_t)nl[P_VERSION].n_value)); 123 124 if (force == 0 && outfile == NULL) 125 printf("warning: no output file specified\n"); 126 127 if ((nl[IA_EXTRALOC].n_type == 0) || 128 (nl[I_NEXTRALOC].n_type == 0) || 129 (nl[I_UEXTRALOC].n_type == 0) || 130 (nl[I_HISTLEN].n_type == 0) || 131 (nl[CA_HISTORY].n_type == 0)) { 132 printf("\ 133 WARNING this kernel doesn't contain all information needed!\n\ 134 WARNING the commands add and change might not work.\n"); 135 oldkernel = 1; 136 } 137 138 if ((nl[P_PDEVNAMES].n_type == 0) || 139 (nl[I_PDEVSIZE].n_type == 0) || 140 (nl[S_PDEVINIT].n_type == 0)) { 141 printf("\ 142 WARNING this kernel doesn't support pseudo devices.\n"); 143 nopdev = 1; 144 } 145 146 init(); 147 148 if (uflag) { 149 if (ok) { 150 if (strcmp(adjust((caddr_t)nl[P_VERSION].n_value), 151 kversion) != 0) 152 ok = 1; 153 } 154 if (!ok) { 155 printf("WARNING kernel mismatch. -u ignored.\n"); 156 printf("WARNING the running kernel version:\n"); 157 printf("%s",kversion); 158 } else { 159 process_history(histlen,history); 160 } 161 } 162 163 if (config()) { 164 if (force == 0 && outfile == NULL) { 165 fprintf(stderr, "not forced\n"); 166 exit(1); 167 } 168 if (outfile == NULL) 169 outfile = file; 170 if (ukc_mod_kernel == 0) { 171 fprintf(stderr, "Kernel not modified\n"); 172 exit(1); 173 } else { 174 printf ("Saving modified kernel.\n"); 175 savekernel(outfile); 176 } 177 } 178 179 return(0); 180 } 181 182 void 183 init() 184 { 185 int i = 0,fd; 186 struct cfdata *cd; 187 short *ln; 188 int *p; 189 #ifdef NOTDEF 190 struct winsize w; 191 #endif 192 193 cd = get_cfdata(0); /* get first item */ 194 195 while(cd->cf_attach != 0) { 196 maxdev = i; 197 totdev = i; 198 199 ln = get_locnamp(cd->cf_locnames); 200 while (*ln != -1) { 201 if (*ln > maxlocnames) 202 maxlocnames = *ln; 203 ln++; 204 } 205 i++; 206 cd++; 207 } 208 209 while(cd->cf_attach == 0) { 210 totdev = i; 211 i++; 212 cd++; 213 } 214 215 totdev = totdev - 1; 216 217 if (nopdev == 0) { 218 p = (int *)adjust((caddr_t)nl[I_PDEVSIZE].n_value); 219 maxpseudo = *p; 220 } 221 222 if ((fd = open("/dev/tty", O_RDWR)) < 0) 223 fd = 2; 224 225 #ifdef NOTDEF 226 if (ioctl(fd, TIOCGWINSZ, &w) == 0) { 227 printf("row %d col %d\n",w.ws_row,w.ws_col); 228 } 229 230 if ((s = getenv("LINES")) != NULL) 231 sc_height = atoi(s); 232 else 233 sc_height = tgetnum("li"); 234 235 if (sc_height <= 0) 236 sc_height = 24; 237 238 if ((s = getenv("COLUMNS")) != NULL) 239 sc_width = atoi(s); 240 else 241 sc_width = tgetnum("co"); 242 243 if (sc_width <= 0) 244 sc_width = 80; 245 #endif 246 } 247