timedc.c revision 1.8 1 /* $NetBSD: timedc.c,v 1.8 2001/09/02 00:13:08 reinoud Exp $ */
2
3 /*-
4 * Copyright (c) 1985, 1993 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 #ifndef lint
38 __COPYRIGHT(
39 "@(#) Copyright (c) 1985, 1993 The Regents of the University of California.\n\
40 All rights reserved.\n");
41 #endif /* not lint */
42
43 #ifndef lint
44 #if 0
45 static char sccsid[] = "@(#)timedc.c 8.1 (Berkeley) 6/6/93";
46 #else
47 __RCSID("$NetBSD: timedc.c,v 1.8 2001/09/02 00:13:08 reinoud Exp $");
48 #endif
49 #endif /* not lint */
50
51 #include "timedc.h"
52 #include <ctype.h>
53 #include <setjmp.h>
54 #include <signal.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <syslog.h>
58 #include <unistd.h>
59
60 int trace = 0;
61 FILE *fd = 0;
62 int margc;
63 int fromatty;
64 char *margv[20];
65 char cmdline[200];
66 jmp_buf toplevel;
67 static struct cmd *getcmd(char *);
68
69 int
70 main(int argc, char *argv[])
71 {
72 register struct cmd *c;
73
74 openlog("timedc", 0, LOG_AUTH);
75
76 /*
77 * security dictates!
78 */
79 if (priv_resources() < 0) {
80 fprintf(stderr, "Could not get privileged resources\n");
81 exit(1);
82 }
83 (void) setuid(getuid());
84
85 if (--argc > 0) {
86 c = getcmd(*++argv);
87 if (c == (struct cmd *)-1) {
88 printf("?Ambiguous command\n");
89 exit(1);
90 }
91 if (c == 0) {
92 printf("?Invalid command\n");
93 exit(1);
94 }
95 if (c->c_priv && getuid()) {
96 printf("?Privileged command\n");
97 exit(1);
98 }
99 (*c->c_handler)(argc, argv);
100 exit(0);
101 }
102
103 fromatty = isatty(fileno(stdin));
104 if (setjmp(toplevel))
105 putchar('\n');
106 (void) signal(SIGINT, intr);
107 for (;;) {
108 if (fromatty) {
109 printf("timedc> ");
110 (void) fflush(stdout);
111 }
112 if (fgets(cmdline, sizeof(cmdline), stdin) == 0)
113 quit(0, NULL);
114 if (cmdline[0] == 0)
115 break;
116 makeargv();
117 if (margv[0] == 0)
118 continue;
119 c = getcmd(margv[0]);
120 if (c == (struct cmd *)-1) {
121 printf("?Ambiguous command\n");
122 continue;
123 }
124 if (c == 0) {
125 printf("?Invalid command\n");
126 continue;
127 }
128 if (c->c_priv && getuid()) {
129 printf("?Privileged command\n");
130 continue;
131 }
132 (*c->c_handler)(margc, margv);
133 }
134 return 0;
135 }
136
137 void
138 intr(signo)
139 int signo;
140 {
141 if (!fromatty)
142 exit(0);
143 longjmp(toplevel, 1);
144 }
145
146
147 static struct cmd *
148 getcmd(char *name)
149 {
150 register char *p, *q;
151 register struct cmd *c, *found;
152 register int nmatches, longest;
153 extern struct cmd cmdtab[];
154 extern int NCMDS;
155
156 longest = 0;
157 nmatches = 0;
158 found = 0;
159 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
160 p = c->c_name;
161 for (q = name; *q == *p++; q++)
162 if (*q == 0) /* exact match? */
163 return(c);
164 if (!*q) { /* the name was a prefix */
165 if (q - name > longest) {
166 longest = q - name;
167 nmatches = 1;
168 found = c;
169 } else if (q - name == longest)
170 nmatches++;
171 }
172 }
173 if (nmatches > 1)
174 return((struct cmd *)-1);
175 return(found);
176 }
177
178 /*
179 * Slice a string up into argc/argv.
180 */
181 void
182 makeargv()
183 {
184 register char *cp;
185 register char **argp = margv;
186
187 margc = 0;
188 for (cp = cmdline; *cp;) {
189 while (isspace(*cp))
190 cp++;
191 if (*cp == '\0')
192 break;
193 *argp++ = cp;
194 margc += 1;
195 while (*cp != '\0' && !isspace(*cp))
196 cp++;
197 if (*cp == '\0')
198 break;
199 *cp++ = '\0';
200 }
201 *argp++ = 0;
202 }
203
204 #define HELPINDENT (sizeof ("directory"))
205
206 /*
207 * Help command.
208 */
209 void
210 help(argc, argv)
211 int argc;
212 char *argv[];
213 {
214 register struct cmd *c;
215 extern struct cmd cmdtab[];
216
217 if (argc == 1) {
218 register int i, j, w;
219 int columns, width = 0, lines;
220 extern int NCMDS;
221
222 printf("Commands may be abbreviated. Commands are:\n\n");
223 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
224 int len = strlen(c->c_name);
225
226 if (len > width)
227 width = len;
228 }
229 width = (width + 8) &~ 7;
230 columns = 80 / width;
231 if (columns == 0)
232 columns = 1;
233 lines = (NCMDS + columns - 1) / columns;
234 for (i = 0; i < lines; i++) {
235 for (j = 0; j < columns; j++) {
236 c = cmdtab + j * lines + i;
237 printf("%s", c->c_name);
238 if (c + lines >= &cmdtab[NCMDS]) {
239 printf("\n");
240 break;
241 }
242 w = strlen(c->c_name);
243 while (w < width) {
244 w = (w + 8) &~ 7;
245 putchar('\t');
246 }
247 }
248 }
249 return;
250 }
251 while (--argc > 0) {
252 register char *arg;
253 arg = *++argv;
254 c = getcmd(arg);
255 if (c == (struct cmd *)-1)
256 printf("?Ambiguous help command %s\n", arg);
257 else if (c == (struct cmd *)0)
258 printf("?Invalid help command %s\n", arg);
259 else
260 printf("%-*s\t%s\n", (int)HELPINDENT,
261 c->c_name, c->c_help);
262 }
263 }
264