Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / usr.sbin / timed / timedc / timedc.c
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  * @(#) Copyright (c) 1985, 1993 The Regents of the University of California.  All rights reserved.
34  * @(#)timedc.c 8.1 (Berkeley) 6/6/93
35  * $FreeBSD: src/usr.sbin/timed/timedc/timedc.c,v 1.3 1999/08/28 01:20:21 peter Exp $
36  * $DragonFly: src/usr.sbin/timed/timedc/timedc.c,v 1.2 2003/06/17 04:30:03 dillon Exp $
37  */
38
39 #include "timedc.h"
40 #include <ctype.h>
41 #include <err.h>
42 #include <setjmp.h>
43 #include <signal.h>
44 #include <stdlib.h>
45 #include <strings.h>
46 #include <syslog.h>
47 #include <unistd.h>
48
49 int trace = 0;
50 FILE *fd = 0;
51 int     margc;
52 int     fromatty;
53 char    *margv[20];
54 char    cmdline[200];
55 jmp_buf toplevel;
56 static struct cmd *getcmd __P((char *));
57
58 int
59 main(argc, argv)
60         int argc;
61         char *argv[];
62 {
63         register struct cmd *c;
64
65         openlog("timedc", LOG_ODELAY, LOG_AUTH);
66
67         /*
68          * security dictates!
69          */
70         if (priv_resources() < 0)
71                 errx(1, "could not get privileged resources");
72         (void) setuid(getuid());
73
74         if (--argc > 0) {
75                 c = getcmd(*++argv);
76                 if (c == (struct cmd *)-1) {
77                         printf("?Ambiguous command\n");
78                         exit(1);
79                 }
80                 if (c == 0) {
81                         printf("?Invalid command\n");
82                         exit(1);
83                 }
84                 if (c->c_priv && getuid()) {
85                         printf("?Privileged command\n");
86                         exit(1);
87                 }
88                 (*c->c_handler)(argc, argv);
89                 exit(0);
90         }
91
92         fromatty = isatty(fileno(stdin));
93         if (setjmp(toplevel))
94                 putchar('\n');
95         (void) signal(SIGINT, intr);
96         for (;;) {
97                 if (fromatty) {
98                         printf("timedc> ");
99                         (void) fflush(stdout);
100                 }
101                 if (fgets(cmdline, sizeof(cmdline), stdin) == 0)
102                         quit();
103                 if (cmdline[0] == 0)
104                         break;
105                 makeargv();
106                 if (margv[0] == 0)
107                         continue;
108                 c = getcmd(margv[0]);
109                 if (c == (struct cmd *)-1) {
110                         printf("?Ambiguous command\n");
111                         continue;
112                 }
113                 if (c == 0) {
114                         printf("?Invalid command\n");
115                         continue;
116                 }
117                 if (c->c_priv && getuid()) {
118                         printf("?Privileged command\n");
119                         continue;
120                 }
121                 (*c->c_handler)(margc, margv);
122         }
123         return 0;
124 }
125
126 void
127 intr(signo)
128         int signo;
129 {
130         if (!fromatty)
131                 exit(0);
132         longjmp(toplevel, 1);
133 }
134
135
136 static struct cmd *
137 getcmd(name)
138         char *name;
139 {
140         register char *p, *q;
141         register struct cmd *c, *found;
142         register int nmatches, longest;
143         extern int NCMDS;
144
145         longest = 0;
146         nmatches = 0;
147         found = 0;
148         for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
149                 p = c->c_name;
150                 for (q = name; *q == *p++; q++)
151                         if (*q == 0)            /* exact match? */
152                                 return(c);
153                 if (!*q) {                      /* the name was a prefix */
154                         if (q - name > longest) {
155                                 longest = q - name;
156                                 nmatches = 1;
157                                 found = c;
158                         } else if (q - name == longest)
159                                 nmatches++;
160                 }
161         }
162         if (nmatches > 1)
163                 return((struct cmd *)-1);
164         return(found);
165 }
166
167 /*
168  * Slice a string up into argc/argv.
169  */
170 void
171 makeargv()
172 {
173         register char *cp;
174         register char **argp = margv;
175
176         margc = 0;
177         for (cp = cmdline; *cp;) {
178                 while (isspace(*cp))
179                         cp++;
180                 if (*cp == '\0')
181                         break;
182                 *argp++ = cp;
183                 margc += 1;
184                 while (*cp != '\0' && !isspace(*cp))
185                         cp++;
186                 if (*cp == '\0')
187                         break;
188                 *cp++ = '\0';
189         }
190         *argp++ = 0;
191 }
192
193 #define HELPINDENT (sizeof ("directory"))
194
195 /*
196  * Help command.
197  */
198 void
199 help(argc, argv)
200         int argc;
201         char *argv[];
202 {
203         register struct cmd *c;
204
205         if (argc == 1) {
206                 register int i, j, w;
207                 int columns, width = 0, lines;
208                 extern int NCMDS;
209
210                 printf("Commands may be abbreviated.  Commands are:\n\n");
211                 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
212                         int len = strlen(c->c_name);
213
214                         if (len > width)
215                                 width = len;
216                 }
217                 width = (width + 8) &~ 7;
218                 columns = 80 / width;
219                 if (columns == 0)
220                         columns = 1;
221                 lines = (NCMDS + columns - 1) / columns;
222                 for (i = 0; i < lines; i++) {
223                         for (j = 0; j < columns; j++) {
224                                 c = cmdtab + j * lines + i;
225                                 printf("%s", c->c_name);
226                                 if (c + lines >= &cmdtab[NCMDS]) {
227                                         printf("\n");
228                                         break;
229                                 }
230                                 w = strlen(c->c_name);
231                                 while (w < width) {
232                                         w = (w + 8) &~ 7;
233                                         putchar('\t');
234                                 }
235                         }
236                 }
237                 return;
238         }
239         while (--argc > 0) {
240                 register char *arg;
241                 arg = *++argv;
242                 c = getcmd(arg);
243                 if (c == (struct cmd *)-1)
244                         printf("?Ambiguous help command %s\n", arg);
245                 else if (c == (struct cmd *)0)
246                         printf("?Invalid help command %s\n", arg);
247                 else
248                         printf("%-*s\t%s\n", (int)HELPINDENT,
249                                 c->c_name, c->c_help);
250         }
251 }