timedc.c revision 230044
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: head/usr.sbin/timed/timedc/timedc.c 230044 2012-01-13 06:51:15Z kevlo $"; 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(argc, argv) 66 int argc; 67 char *argv[]; 68{ 69 register struct cmd *c; 70 71 openlog("timedc", LOG_ODELAY, LOG_AUTH); 72 73 /* 74 * security dictates! 75 */ 76 if (priv_resources() < 0) 77 errx(1, "could not get privileged resources"); 78 if (setuid(getuid()) != 0) 79 err(1, "setuid()"); 80 81 if (--argc > 0) { 82 c = getcmd(*++argv); 83 if (c == (struct cmd *)-1) { 84 printf("?Ambiguous command\n"); 85 exit(1); 86 } 87 if (c == 0) { 88 printf("?Invalid command\n"); 89 exit(1); 90 } 91 if (c->c_priv && getuid()) { 92 printf("?Privileged command\n"); 93 exit(1); 94 } 95 (*c->c_handler)(argc, argv); 96 exit(0); 97 } 98 99 fromatty = isatty(fileno(stdin)); 100 if (setjmp(toplevel)) 101 putchar('\n'); 102 (void) signal(SIGINT, intr); 103 for (;;) { 104 if (fromatty) { 105 printf("timedc> "); 106 (void) fflush(stdout); 107 } 108 if (fgets(cmdline, sizeof(cmdline), stdin) == NULL) 109 quit(); 110 if (cmdline[0] == 0) 111 break; 112 makeargv(); 113 if (margv[0] == 0) 114 continue; 115 c = getcmd(margv[0]); 116 if (c == (struct cmd *)-1) { 117 printf("?Ambiguous command\n"); 118 continue; 119 } 120 if (c == 0) { 121 printf("?Invalid command\n"); 122 continue; 123 } 124 if (c->c_priv && getuid()) { 125 printf("?Privileged command\n"); 126 continue; 127 } 128 (*c->c_handler)(margc, margv); 129 } 130 return 0; 131} 132 133void 134intr(signo) 135 int signo; 136{ 137 if (!fromatty) 138 exit(0); 139 longjmp(toplevel, 1); 140} 141 142 143static struct cmd * 144getcmd(name) 145 char *name; 146{ 147 register char *p, *q; 148 register struct cmd *c, *found; 149 register int nmatches, longest; 150 extern int NCMDS; 151 152 longest = 0; 153 nmatches = 0; 154 found = 0; 155 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 156 p = c->c_name; 157 for (q = name; *q == *p++; q++) 158 if (*q == 0) /* exact match? */ 159 return(c); 160 if (!*q) { /* the name was a prefix */ 161 if (q - name > longest) { 162 longest = q - name; 163 nmatches = 1; 164 found = c; 165 } else if (q - name == longest) 166 nmatches++; 167 } 168 } 169 if (nmatches > 1) 170 return((struct cmd *)-1); 171 return(found); 172} 173 174/* 175 * Slice a string up into argc/argv. 176 */ 177void 178makeargv() 179{ 180 register char *cp; 181 register char **argp = margv; 182 183 margc = 0; 184 for (cp = cmdline; margc < MAX_MARGV - 1 && *cp; ) { 185 while (isspace(*cp)) 186 cp++; 187 if (*cp == '\0') 188 break; 189 *argp++ = cp; 190 margc += 1; 191 while (*cp != '\0' && !isspace(*cp)) 192 cp++; 193 if (*cp == '\0') 194 break; 195 *cp++ = '\0'; 196 } 197 *argp++ = 0; 198} 199 200#define HELPINDENT (sizeof ("directory")) 201 202/* 203 * Help command. 204 */ 205void 206help(argc, argv) 207 int argc; 208 char *argv[]; 209{ 210 register struct cmd *c; 211 212 if (argc == 1) { 213 register int i, j, w; 214 int columns, width = 0, lines; 215 extern int NCMDS; 216 217 printf("Commands may be abbreviated. Commands are:\n\n"); 218 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 219 int len = strlen(c->c_name); 220 221 if (len > width) 222 width = len; 223 } 224 width = (width + 8) &~ 7; 225 columns = 80 / width; 226 if (columns == 0) 227 columns = 1; 228 lines = (NCMDS + columns - 1) / columns; 229 for (i = 0; i < lines; i++) { 230 for (j = 0; j < columns; j++) { 231 c = cmdtab + j * lines + i; 232 printf("%s", c->c_name); 233 if (c + lines >= &cmdtab[NCMDS]) { 234 printf("\n"); 235 break; 236 } 237 w = strlen(c->c_name); 238 while (w < width) { 239 w = (w + 8) &~ 7; 240 putchar('\t'); 241 } 242 } 243 } 244 return; 245 } 246 while (--argc > 0) { 247 register char *arg; 248 arg = *++argv; 249 c = getcmd(arg); 250 if (c == (struct cmd *)-1) 251 printf("?Ambiguous help command %s\n", arg); 252 else if (c == (struct cmd *)0) 253 printf("?Invalid help command %s\n", arg); 254 else 255 printf("%-*s\t%s\n", (int)HELPINDENT, 256 c->c_name, c->c_help); 257 } 258} 259