1 /*- 2 * Copyright (c) 1985, 1993 The Regents of the University of California. 3 * 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 35 char copyright[] = 36 "@(#) Copyright (c) 1985, 1993 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)timedc.c 5.1 (Berkeley) 5/11/93"; 42 #endif /* not lint */ 43 44 #ifdef sgi 45 #ident "$Revision: 1.3 $" 46 #endif 47 48 #include "timedc.h" 49 #include <strings.h> 50 #include <signal.h> 51 #include <ctype.h> 52 #include <setjmp.h> 53 #include <unistd.h> 54 #include <stdlib.h> 55 #include <syslog.h> 56 57 int trace = 0; 58 FILE *fd = 0; 59 int margc; 60 int fromatty; 61 char *margv[20]; 62 char cmdline[200]; 63 jmp_buf toplevel; 64 static struct cmd *getcmd(char *); 65 66 int 67 main(int argc, 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 fprintf(stderr, "Could not get privileged resources\n"); 78 exit(1); 79 } 80 (void) setuid(getuid()); 81 82 if (--argc > 0) { 83 c = getcmd(*++argv); 84 if (c == (struct cmd *)-1) { 85 printf("?Ambiguous command\n"); 86 exit(1); 87 } 88 if (c == 0) { 89 printf("?Invalid command\n"); 90 exit(1); 91 } 92 if (c->c_priv && getuid()) { 93 printf("?Privileged command\n"); 94 exit(1); 95 } 96 (*c->c_handler)(argc, argv); 97 exit(0); 98 } 99 100 fromatty = isatty(fileno(stdin)); 101 if (setjmp(toplevel)) 102 putchar('\n'); 103 (void) signal(SIGINT, intr); 104 for (;;) { 105 if (fromatty) { 106 printf("timedc> "); 107 (void) fflush(stdout); 108 } 109 if (fgets(cmdline, sizeof(cmdline), stdin) == 0) 110 quit(); 111 if (cmdline[0] == 0) 112 break; 113 makeargv(); 114 if (margv[0] == 0) 115 continue; 116 c = getcmd(margv[0]); 117 if (c == (struct cmd *)-1) { 118 printf("?Ambiguous command\n"); 119 continue; 120 } 121 if (c == 0) { 122 printf("?Invalid command\n"); 123 continue; 124 } 125 if (c->c_priv && getuid()) { 126 printf("?Privileged command\n"); 127 continue; 128 } 129 (*c->c_handler)(margc, margv); 130 } 131 return 0; 132 } 133 134 void 135 intr(signo) 136 int signo; 137 { 138 if (!fromatty) 139 exit(0); 140 longjmp(toplevel, 1); 141 } 142 143 144 static struct cmd * 145 getcmd(char *name) 146 { 147 register char *p, *q; 148 register struct cmd *c, *found; 149 register int nmatches, longest; 150 extern struct cmd cmdtab[]; 151 extern int NCMDS; 152 153 longest = 0; 154 nmatches = 0; 155 found = 0; 156 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 157 p = c->c_name; 158 for (q = name; *q == *p++; q++) 159 if (*q == 0) /* exact match? */ 160 return(c); 161 if (!*q) { /* the name was a prefix */ 162 if (q - name > longest) { 163 longest = q - name; 164 nmatches = 1; 165 found = c; 166 } else if (q - name == longest) 167 nmatches++; 168 } 169 } 170 if (nmatches > 1) 171 return((struct cmd *)-1); 172 return(found); 173 } 174 175 /* 176 * Slice a string up into argc/argv. 177 */ 178 void 179 makeargv() 180 { 181 register char *cp; 182 register char **argp = margv; 183 184 margc = 0; 185 for (cp = cmdline; *cp;) { 186 while (isspace(*cp)) 187 cp++; 188 if (*cp == '\0') 189 break; 190 *argp++ = cp; 191 margc += 1; 192 while (*cp != '\0' && !isspace(*cp)) 193 cp++; 194 if (*cp == '\0') 195 break; 196 *cp++ = '\0'; 197 } 198 *argp++ = 0; 199 } 200 201 #define HELPINDENT (sizeof ("directory")) 202 203 /* 204 * Help command. 205 */ 206 void 207 help(argc, argv) 208 int argc; 209 char *argv[]; 210 { 211 register struct cmd *c; 212 extern struct cmd cmdtab[]; 213 214 if (argc == 1) { 215 register int i, j, w; 216 int columns, width = 0, lines; 217 extern int NCMDS; 218 219 printf("Commands may be abbreviated. Commands are:\n\n"); 220 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 221 int len = strlen(c->c_name); 222 223 if (len > width) 224 width = len; 225 } 226 width = (width + 8) &~ 7; 227 columns = 80 / width; 228 if (columns == 0) 229 columns = 1; 230 lines = (NCMDS + columns - 1) / columns; 231 for (i = 0; i < lines; i++) { 232 for (j = 0; j < columns; j++) { 233 c = cmdtab + j * lines + i; 234 printf("%s", c->c_name); 235 if (c + lines >= &cmdtab[NCMDS]) { 236 printf("\n"); 237 break; 238 } 239 w = strlen(c->c_name); 240 while (w < width) { 241 w = (w + 8) &~ 7; 242 putchar('\t'); 243 } 244 } 245 } 246 return; 247 } 248 while (--argc > 0) { 249 register char *arg; 250 arg = *++argv; 251 c = getcmd(arg); 252 if (c == (struct cmd *)-1) 253 printf("?Ambiguous help command %s\n", arg); 254 else if (c == (struct cmd *)0) 255 printf("?Invalid help command %s\n", arg); 256 else 257 printf("%-*s\t%s\n", (int)HELPINDENT, 258 c->c_name, c->c_help); 259 } 260 } 261