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Copy stable/8 to releng/8.1 in preparation for 8.1-RC1.
[FreeBSD/releng/8.1.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
34 #ifndef lint
35 static const 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 #if 0
42 static char sccsid[] = "@(#)timedc.c    8.1 (Berkeley) 6/6/93";
43 #endif
44 static const char rcsid[] =
45   "$FreeBSD$";
46 #endif /* not lint */
47
48 #include "timedc.h"
49 #include <ctype.h>
50 #include <err.h>
51 #include <setjmp.h>
52 #include <signal.h>
53 #include <stdlib.h>
54 #include <string.h>
55 #include <syslog.h>
56 #include <unistd.h>
57
58 int trace = 0;
59 FILE *fd = 0;
60 int     margc;
61 int     fromatty;
62 #define MAX_MARGV       20
63 char    *margv[MAX_MARGV];
64 char    cmdline[200];
65 jmp_buf toplevel;
66 static struct cmd *getcmd(char *);
67
68 int
69 main(argc, argv)
70         int argc;
71         char *argv[];
72 {
73         register struct cmd *c;
74
75         openlog("timedc", LOG_ODELAY, LOG_AUTH);
76
77         /*
78          * security dictates!
79          */
80         if (priv_resources() < 0)
81                 errx(1, "could not get privileged resources");
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; margc < MAX_MARGV - 1 && *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 }