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
31 static 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
38 static char sccsid[] = "@(#)timedc.c 8.1 (Berkeley) 6/6/93";
39 #endif
40 static const char rcsid[] =
41 "$FreeBSD: stable/9/usr.sbin/timed/timedc/timedc.c 220970 2011-04-23 13:57:12Z simon $";
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
54 int trace = 0;
55 FILE *fd = 0;
56 int margc;
57 int fromatty;
58 #define MAX_MARGV 20
59 char *margv[MAX_MARGV];
60 char cmdline[200];
61 jmp_buf toplevel;
62 static struct cmd *getcmd(char *);
63
64 int
main(argc,argv)65 main(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) == 0)
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
133 void
intr(signo)134 intr(signo)
135 int signo;
136 {
137 if (!fromatty)
138 exit(0);
139 longjmp(toplevel, 1);
140 }
141
142
143 static struct cmd *
getcmd(name)144 getcmd(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 */
177 void
makeargv()178 makeargv()
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 */
205 void
help(argc,argv)206 help(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