1 /*- 2 * Copyright (c) 1985, 1993 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 char copyright[] = 10 "@(#) Copyright (c) 1985, 1993 The Regents of the University of California.\n\ 11 All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)timedc.c 5.1 (Berkeley) 05/11/93"; 16 #endif /* not lint */ 17 18 #ifdef sgi 19 #ident "$Revision: 1.6 $" 20 #endif 21 22 #include "timedc.h" 23 #include <strings.h> 24 #include <signal.h> 25 #include <ctype.h> 26 #include <setjmp.h> 27 #include <unistd.h> 28 #include <stdlib.h> 29 #include <syslog.h> 30 31 int trace = 0; 32 FILE *fd = 0; 33 int margc; 34 int fromatty; 35 char *margv[20]; 36 char cmdline[200]; 37 jmp_buf toplevel; 38 static struct cmd *getcmd __P((char *)); 39 40 int 41 main(argc, argv) 42 int argc; 43 char *argv[]; 44 { 45 register struct cmd *c; 46 47 openlog("timedc", LOG_ODELAY, LOG_AUTH); 48 49 /* 50 * security dictates! 51 */ 52 if (priv_resources() < 0) { 53 fprintf(stderr, "Could not get privileged resources\n"); 54 exit(1); 55 } 56 (void) setuid(getuid()); 57 58 if (--argc > 0) { 59 c = getcmd(*++argv); 60 if (c == (struct cmd *)-1) { 61 printf("?Ambiguous command\n"); 62 exit(1); 63 } 64 if (c == 0) { 65 printf("?Invalid command\n"); 66 exit(1); 67 } 68 if (c->c_priv && getuid()) { 69 printf("?Privileged command\n"); 70 exit(1); 71 } 72 (*c->c_handler)(argc, argv); 73 exit(0); 74 } 75 76 fromatty = isatty(fileno(stdin)); 77 if (setjmp(toplevel)) 78 putchar('\n'); 79 (void) signal(SIGINT, intr); 80 for (;;) { 81 if (fromatty) { 82 printf("timedc> "); 83 (void) fflush(stdout); 84 } 85 if (fgets(cmdline, sizeof(cmdline), stdin) == 0) 86 quit(); 87 if (cmdline[0] == 0) 88 break; 89 makeargv(); 90 if (margv[0] == 0) 91 continue; 92 c = getcmd(margv[0]); 93 if (c == (struct cmd *)-1) { 94 printf("?Ambiguous command\n"); 95 continue; 96 } 97 if (c == 0) { 98 printf("?Invalid command\n"); 99 continue; 100 } 101 if (c->c_priv && getuid()) { 102 printf("?Privileged command\n"); 103 continue; 104 } 105 (*c->c_handler)(margc, margv); 106 } 107 return 0; 108 } 109 110 void 111 intr(signo) 112 int signo; 113 { 114 if (!fromatty) 115 exit(0); 116 longjmp(toplevel, 1); 117 } 118 119 120 static struct cmd * 121 getcmd(name) 122 char *name; 123 { 124 register char *p, *q; 125 register struct cmd *c, *found; 126 register int nmatches, longest; 127 extern struct cmd cmdtab[]; 128 extern int NCMDS; 129 130 longest = 0; 131 nmatches = 0; 132 found = 0; 133 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 134 p = c->c_name; 135 for (q = name; *q == *p++; q++) 136 if (*q == 0) /* exact match? */ 137 return(c); 138 if (!*q) { /* the name was a prefix */ 139 if (q - name > longest) { 140 longest = q - name; 141 nmatches = 1; 142 found = c; 143 } else if (q - name == longest) 144 nmatches++; 145 } 146 } 147 if (nmatches > 1) 148 return((struct cmd *)-1); 149 return(found); 150 } 151 152 /* 153 * Slice a string up into argc/argv. 154 */ 155 void 156 makeargv() 157 { 158 register char *cp; 159 register char **argp = margv; 160 161 margc = 0; 162 for (cp = cmdline; *cp;) { 163 while (isspace(*cp)) 164 cp++; 165 if (*cp == '\0') 166 break; 167 *argp++ = cp; 168 margc += 1; 169 while (*cp != '\0' && !isspace(*cp)) 170 cp++; 171 if (*cp == '\0') 172 break; 173 *cp++ = '\0'; 174 } 175 *argp++ = 0; 176 } 177 178 #define HELPINDENT (sizeof ("directory")) 179 180 /* 181 * Help command. 182 */ 183 void 184 help(argc, argv) 185 int argc; 186 char *argv[]; 187 { 188 register struct cmd *c; 189 extern struct cmd cmdtab[]; 190 191 if (argc == 1) { 192 register int i, j, w; 193 int columns, width = 0, lines; 194 extern int NCMDS; 195 196 printf("Commands may be abbreviated. Commands are:\n\n"); 197 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 198 int len = strlen(c->c_name); 199 200 if (len > width) 201 width = len; 202 } 203 width = (width + 8) &~ 7; 204 columns = 80 / width; 205 if (columns == 0) 206 columns = 1; 207 lines = (NCMDS + columns - 1) / columns; 208 for (i = 0; i < lines; i++) { 209 for (j = 0; j < columns; j++) { 210 c = cmdtab + j * lines + i; 211 printf("%s", c->c_name); 212 if (c + lines >= &cmdtab[NCMDS]) { 213 printf("\n"); 214 break; 215 } 216 w = strlen(c->c_name); 217 while (w < width) { 218 w = (w + 8) &~ 7; 219 putchar('\t'); 220 } 221 } 222 } 223 return; 224 } 225 while (--argc > 0) { 226 register char *arg; 227 arg = *++argv; 228 c = getcmd(arg); 229 if (c == (struct cmd *)-1) 230 printf("?Ambiguous help command %s\n", arg); 231 else if (c == (struct cmd *)0) 232 printf("?Invalid help command %s\n", arg); 233 else 234 printf("%-*s\t%s\n", (int)HELPINDENT, 235 c->c_name, c->c_help); 236 } 237 } 238