]> CyberLeo.Net >> Repos - FreeBSD/releng/10.0.git/blob - usr.sbin/timed/timedc/timedc.c
- Copy stable/10 (r259064) to releng/10.0 as part of the
[FreeBSD/releng/10.0.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  * 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   "$FreeBSD$";
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
65 main(int argc, char *argv[])
66 {
67         register struct cmd *c;
68
69         openlog("timedc", LOG_ODELAY, LOG_AUTH);
70
71         /*
72          * security dictates!
73          */
74         if (priv_resources() < 0)
75                 errx(1, "could not get privileged resources");
76         if (setuid(getuid()) != 0)
77                 err(1, "setuid()");
78
79         if (--argc > 0) {
80                 c = getcmd(*++argv);
81                 if (c == (struct cmd *)-1) {
82                         printf("?Ambiguous command\n");
83                         exit(1);
84                 }
85                 if (c == 0) {
86                         printf("?Invalid command\n");
87                         exit(1);
88                 }
89                 if (c->c_priv && getuid()) {
90                         printf("?Privileged command\n");
91                         exit(1);
92                 }
93                 (*c->c_handler)(argc, argv);
94                 exit(0);
95         }
96
97         fromatty = isatty(fileno(stdin));
98         if (setjmp(toplevel))
99                 putchar('\n');
100         (void) signal(SIGINT, intr);
101         for (;;) {
102                 if (fromatty) {
103                         printf("timedc> ");
104                         (void) fflush(stdout);
105                 }
106                 if (fgets(cmdline, sizeof(cmdline), stdin) == NULL)
107                         quit();
108                 if (cmdline[0] == 0)
109                         break;
110                 makeargv();
111                 if (margv[0] == 0)
112                         continue;
113                 c = getcmd(margv[0]);
114                 if (c == (struct cmd *)-1) {
115                         printf("?Ambiguous command\n");
116                         continue;
117                 }
118                 if (c == 0) {
119                         printf("?Invalid command\n");
120                         continue;
121                 }
122                 if (c->c_priv && getuid()) {
123                         printf("?Privileged command\n");
124                         continue;
125                 }
126                 (*c->c_handler)(margc, margv);
127         }
128         return 0;
129 }
130
131 void
132 intr(int signo __unused)
133 {
134         if (!fromatty)
135                 exit(0);
136         longjmp(toplevel, 1);
137 }
138
139
140 static struct cmd *
141 getcmd(char *name)
142 {
143         register char *p, *q;
144         register struct cmd *c, *found;
145         register int nmatches, longest;
146         extern int NCMDS;
147
148         longest = 0;
149         nmatches = 0;
150         found = 0;
151         for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
152                 p = c->c_name;
153                 for (q = name; *q == *p++; q++)
154                         if (*q == 0)            /* exact match? */
155                                 return(c);
156                 if (!*q) {                      /* the name was a prefix */
157                         if (q - name > longest) {
158                                 longest = q - name;
159                                 nmatches = 1;
160                                 found = c;
161                         } else if (q - name == longest)
162                                 nmatches++;
163                 }
164         }
165         if (nmatches > 1)
166                 return((struct cmd *)-1);
167         return(found);
168 }
169
170 /*
171  * Slice a string up into argc/argv.
172  */
173 void
174 makeargv(void)
175 {
176         register char *cp;
177         register char **argp = margv;
178
179         margc = 0;
180         for (cp = cmdline; margc < MAX_MARGV - 1 && *cp; ) {
181                 while (isspace(*cp))
182                         cp++;
183                 if (*cp == '\0')
184                         break;
185                 *argp++ = cp;
186                 margc += 1;
187                 while (*cp != '\0' && !isspace(*cp))
188                         cp++;
189                 if (*cp == '\0')
190                         break;
191                 *cp++ = '\0';
192         }
193         *argp++ = 0;
194 }
195
196 #define HELPINDENT (sizeof ("directory"))
197
198 /*
199  * Help command.
200  */
201 void
202 help(int argc, char *argv[])
203 {
204         register struct cmd *c;
205
206         if (argc == 1) {
207                 register int i, j, w;
208                 int columns, width = 0, lines;
209                 extern int NCMDS;
210
211                 printf("Commands may be abbreviated.  Commands are:\n\n");
212                 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
213                         int len = strlen(c->c_name);
214
215                         if (len > width)
216                                 width = len;
217                 }
218                 width = (width + 8) &~ 7;
219                 columns = 80 / width;
220                 if (columns == 0)
221                         columns = 1;
222                 lines = (NCMDS + columns - 1) / columns;
223                 for (i = 0; i < lines; i++) {
224                         for (j = 0; j < columns; j++) {
225                                 c = cmdtab + j * lines + i;
226                                 printf("%s", c->c_name);
227                                 if (c + lines >= &cmdtab[NCMDS]) {
228                                         printf("\n");
229                                         break;
230                                 }
231                                 w = strlen(c->c_name);
232                                 while (w < width) {
233                                         w = (w + 8) &~ 7;
234                                         putchar('\t');
235                                 }
236                         }
237                 }
238                 return;
239         }
240         while (--argc > 0) {
241                 register char *arg;
242                 arg = *++argv;
243                 c = getcmd(arg);
244                 if (c == (struct cmd *)-1)
245                         printf("?Ambiguous help command %s\n", arg);
246                 else if (c == (struct cmd *)0)
247                         printf("?Invalid help command %s\n", arg);
248                 else
249                         printf("%-*s\t%s\n", (int)HELPINDENT,
250                                 c->c_name, c->c_help);
251         }
252 }