1/*- 2 * Copyright (c) 1985, 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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char copyright[] = 32"@(#) Copyright (c) 1985, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#ifndef lint 37#if 0 38static char sccsid[] = "@(#)timedc.c 8.1 (Berkeley) 6/6/93"; 39#endif 40static const char rcsid[] = 41 "$FreeBSD: releng/10.3/usr.sbin/timed/timedc/timedc.c 246209 2013-02-01 14:26:54Z charnier $"; 42#endif /* not lint */ 43 44#include "timedc.h" 45#include <ctype.h> 46#include <err.h> 47#include <setjmp.h> 48#include <signal.h> 49#include <stdlib.h> 50#include <string.h> 51#include <syslog.h> 52#include <unistd.h> 53 54int trace = 0; 55FILE *fd = 0; 56int margc; 57int fromatty; 58#define MAX_MARGV 20 59char *margv[MAX_MARGV]; 60char cmdline[200]; 61jmp_buf toplevel; 62static struct cmd *getcmd(char *); 63 64int 65main(int argc, char *argv[]) 66{ 67 register struct cmd *c; 68 69 openlog("timedc", LOG_ODELAY, LOG_AUTH); 70 71 /* 72 * security dictates! 73 */ 74 if (priv_resources() < 0) 75 errx(1, "could not get privileged resources"); 76 if (setuid(getuid()) != 0) 77 err(1, "setuid()"); 78 79 if (--argc > 0) { 80 c = getcmd(*++argv); 81 if (c == (struct cmd *)-1) { 82 printf("?Ambiguous command\n"); 83 exit(1); 84 } 85 if (c == 0) { 86 printf("?Invalid command\n"); 87 exit(1); 88 } 89 if (c->c_priv && getuid()) { 90 printf("?Privileged command\n"); 91 exit(1); 92 } 93 (*c->c_handler)(argc, argv); 94 exit(0); 95 } 96 97 fromatty = isatty(fileno(stdin)); 98 if (setjmp(toplevel)) 99 putchar('\n'); 100 (void) signal(SIGINT, intr); 101 for (;;) { 102 if (fromatty) { 103 printf("timedc> "); 104 (void) fflush(stdout); 105 } 106 if (fgets(cmdline, sizeof(cmdline), stdin) == NULL) 107 quit(); 108 if (cmdline[0] == 0) 109 break; 110 makeargv(); 111 if (margv[0] == 0) 112 continue; 113 c = getcmd(margv[0]); 114 if (c == (struct cmd *)-1) { 115 printf("?Ambiguous command\n"); 116 continue; 117 } 118 if (c == 0) { 119 printf("?Invalid command\n"); 120 continue; 121 } 122 if (c->c_priv && getuid()) { 123 printf("?Privileged command\n"); 124 continue; 125 } 126 (*c->c_handler)(margc, margv); 127 } 128 return 0; 129} 130 131void 132intr(int signo __unused) 133{ 134 if (!fromatty) 135 exit(0); 136 longjmp(toplevel, 1); 137} 138 139 140static struct cmd * 141getcmd(char *name) 142{ 143 register char *p, *q; 144 register struct cmd *c, *found; 145 register int nmatches, longest; 146 extern int NCMDS; 147 148 longest = 0; 149 nmatches = 0; 150 found = 0; 151 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 152 p = c->c_name; 153 for (q = name; *q == *p++; q++) 154 if (*q == 0) /* exact match? */ 155 return(c); 156 if (!*q) { /* the name was a prefix */ 157 if (q - name > longest) { 158 longest = q - name; 159 nmatches = 1; 160 found = c; 161 } else if (q - name == longest) 162 nmatches++; 163 } 164 } 165 if (nmatches > 1) 166 return((struct cmd *)-1); 167 return(found); 168} 169 170/* 171 * Slice a string up into argc/argv. 172 */ 173void 174makeargv(void) 175{ 176 register char *cp; 177 register char **argp = margv; 178 179 margc = 0; 180 for (cp = cmdline; margc < MAX_MARGV - 1 && *cp; ) { 181 while (isspace(*cp)) 182 cp++; 183 if (*cp == '\0') 184 break; 185 *argp++ = cp; 186 margc += 1; 187 while (*cp != '\0' && !isspace(*cp)) 188 cp++; 189 if (*cp == '\0') 190 break; 191 *cp++ = '\0'; 192 } 193 *argp++ = 0; 194} 195 196#define HELPINDENT (sizeof ("directory")) 197 198/* 199 * Help command. 200 */ 201void 202help(int argc, char *argv[]) 203{ 204 register struct cmd *c; 205 206 if (argc == 1) { 207 register int i, j, w; 208 int columns, width = 0, lines; 209 extern int NCMDS; 210 211 printf("Commands may be abbreviated. Commands are:\n\n"); 212 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 213 int len = strlen(c->c_name); 214 215 if (len > width) 216 width = len; 217 } 218 width = (width + 8) &~ 7; 219 columns = 80 / width; 220 if (columns == 0) 221 columns = 1; 222 lines = (NCMDS + columns - 1) / columns; 223 for (i = 0; i < lines; i++) { 224 for (j = 0; j < columns; j++) { 225 c = cmdtab + j * lines + i; 226 printf("%s", c->c_name); 227 if (c + lines >= &cmdtab[NCMDS]) { 228 printf("\n"); 229 break; 230 } 231 w = strlen(c->c_name); 232 while (w < width) { 233 w = (w + 8) &~ 7; 234 putchar('\t'); 235 } 236 } 237 } 238 return; 239 } 240 while (--argc > 0) { 241 register char *arg; 242 arg = *++argv; 243 c = getcmd(arg); 244 if (c == (struct cmd *)-1) 245 printf("?Ambiguous help command %s\n", arg); 246 else if (c == (struct cmd *)0) 247 printf("?Invalid help command %s\n", arg); 248 else 249 printf("%-*s\t%s\n", (int)HELPINDENT, 250 c->c_name, c->c_help); 251 } 252} 253