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 * 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 static char copyright[] = 36 "@(#) Copyright (c) 1985, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)timedc.c 8.1 (Berkeley) 6/6/93"; 42 #endif /* not lint */ 43 44 #ifdef sgi 45 #ident "$Revision: 1.1.1.2 $" 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 __P((char *)); 65 66 int 67 main(argc, argv) 68 int argc; 69 char *argv[]; 70 { 71 register struct cmd *c; 72 73 openlog("timedc", LOG_ODELAY, LOG_AUTH); 74 75 /* 76 * security dictates! 77 */ 78 if (priv_resources() < 0) { 79 fprintf(stderr, "Could not get privileged resources\n"); 80 exit(1); 81 } 82 (void) setuid(getuid()); 83 84 if (--argc > 0) { 85 c = getcmd(*++argv); 86 if (c == (struct cmd *)-1) { 87 printf("?Ambiguous command\n"); 88 exit(1); 89 } 90 if (c == 0) { 91 printf("?Invalid command\n"); 92 exit(1); 93 } 94 if (c->c_priv && getuid()) { 95 printf("?Privileged command\n"); 96 exit(1); 97 } 98 (*c->c_handler)(argc, argv); 99 exit(0); 100 } 101 102 fromatty = isatty(fileno(stdin)); 103 if (setjmp(toplevel)) 104 putchar('\n'); 105 (void) signal(SIGINT, intr); 106 for (;;) { 107 if (fromatty) { 108 printf("timedc> "); 109 (void) fflush(stdout); 110 } 111 if (fgets(cmdline, sizeof(cmdline), stdin) == 0) 112 quit(); 113 if (cmdline[0] == 0) 114 break; 115 makeargv(); 116 if (margv[0] == 0) 117 continue; 118 c = getcmd(margv[0]); 119 if (c == (struct cmd *)-1) { 120 printf("?Ambiguous command\n"); 121 continue; 122 } 123 if (c == 0) { 124 printf("?Invalid command\n"); 125 continue; 126 } 127 if (c->c_priv && getuid()) { 128 printf("?Privileged command\n"); 129 continue; 130 } 131 (*c->c_handler)(margc, margv); 132 } 133 return 0; 134 } 135 136 void 137 intr(signo) 138 int signo; 139 { 140 if (!fromatty) 141 exit(0); 142 longjmp(toplevel, 1); 143 } 144 145 146 static struct cmd * 147 getcmd(name) 148 char *name; 149 { 150 register char *p, *q; 151 register struct cmd *c, *found; 152 register int nmatches, longest; 153 extern int NCMDS; 154 155 longest = 0; 156 nmatches = 0; 157 found = 0; 158 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 159 p = c->c_name; 160 for (q = name; *q == *p++; q++) 161 if (*q == 0) /* exact match? */ 162 return(c); 163 if (!*q) { /* the name was a prefix */ 164 if (q - name > longest) { 165 longest = q - name; 166 nmatches = 1; 167 found = c; 168 } else if (q - name == longest) 169 nmatches++; 170 } 171 } 172 if (nmatches > 1) 173 return((struct cmd *)-1); 174 return(found); 175 } 176 177 /* 178 * Slice a string up into argc/argv. 179 */ 180 void 181 makeargv() 182 { 183 register char *cp; 184 register char **argp = margv; 185 186 margc = 0; 187 for (cp = cmdline; *cp;) { 188 while (isspace(*cp)) 189 cp++; 190 if (*cp == '\0') 191 break; 192 *argp++ = cp; 193 margc += 1; 194 while (*cp != '\0' && !isspace(*cp)) 195 cp++; 196 if (*cp == '\0') 197 break; 198 *cp++ = '\0'; 199 } 200 *argp++ = 0; 201 } 202 203 #define HELPINDENT (sizeof ("directory")) 204 205 /* 206 * Help command. 207 */ 208 void 209 help(argc, argv) 210 int argc; 211 char *argv[]; 212 { 213 register struct cmd *c; 214 215 if (argc == 1) { 216 register int i, j, w; 217 int columns, width = 0, lines; 218 extern int NCMDS; 219 220 printf("Commands may be abbreviated. Commands are:\n\n"); 221 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 222 int len = strlen(c->c_name); 223 224 if (len > width) 225 width = len; 226 } 227 width = (width + 8) &~ 7; 228 columns = 80 / width; 229 if (columns == 0) 230 columns = 1; 231 lines = (NCMDS + columns - 1) / columns; 232 for (i = 0; i < lines; i++) { 233 for (j = 0; j < columns; j++) { 234 c = cmdtab + j * lines + i; 235 printf("%s", c->c_name); 236 if (c + lines >= &cmdtab[NCMDS]) { 237 printf("\n"); 238 break; 239 } 240 w = strlen(c->c_name); 241 while (w < width) { 242 w = (w + 8) &~ 7; 243 putchar('\t'); 244 } 245 } 246 } 247 return; 248 } 249 while (--argc > 0) { 250 register char *arg; 251 arg = *++argv; 252 c = getcmd(arg); 253 if (c == (struct cmd *)-1) 254 printf("?Ambiguous help command %s\n", arg); 255 else if (c == (struct cmd *)0) 256 printf("?Invalid help command %s\n", arg); 257 else 258 printf("%-*s\t%s\n", (int)HELPINDENT, 259 c->c_name, c->c_help); 260 } 261 } 262