1 /*-
2 * Copyright (c) 1985, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char copyright[] =
10 "@(#) Copyright (c) 1985, 1993\n\
11 The Regents of the University of California. All rights reserved.\n";
12 #endif /* not lint */
13
14 #ifndef lint
15 static char sccsid[] = "@(#)timedc.c 8.1 (Berkeley) 06/06/93";
16 #endif /* not lint */
17
18 #ifdef sgi
19 #ident "$Revision: 1.6 $"
20 #endif
21
22 #include "timedc.h"
23 #include <strings.h>
24 #include <signal.h>
25 #include <ctype.h>
26 #include <setjmp.h>
27 #include <unistd.h>
28 #include <stdlib.h>
29 #include <syslog.h>
30
31 int trace = 0;
32 FILE *fd = 0;
33 int margc;
34 int fromatty;
35 char *margv[20];
36 char cmdline[200];
37 jmp_buf toplevel;
38 static struct cmd *getcmd __P((char *));
39
40 int
main(argc,argv)41 main(argc, argv)
42 int argc;
43 char *argv[];
44 {
45 register struct cmd *c;
46
47 openlog("timedc", LOG_ODELAY, LOG_AUTH);
48
49 /*
50 * security dictates!
51 */
52 if (priv_resources() < 0) {
53 fprintf(stderr, "Could not get privileged resources\n");
54 exit(1);
55 }
56 (void) setuid(getuid());
57
58 if (--argc > 0) {
59 c = getcmd(*++argv);
60 if (c == (struct cmd *)-1) {
61 printf("?Ambiguous command\n");
62 exit(1);
63 }
64 if (c == 0) {
65 printf("?Invalid command\n");
66 exit(1);
67 }
68 if (c->c_priv && getuid()) {
69 printf("?Privileged command\n");
70 exit(1);
71 }
72 (*c->c_handler)(argc, argv);
73 exit(0);
74 }
75
76 fromatty = isatty(fileno(stdin));
77 if (setjmp(toplevel))
78 putchar('\n');
79 (void) signal(SIGINT, intr);
80 for (;;) {
81 if (fromatty) {
82 printf("timedc> ");
83 (void) fflush(stdout);
84 }
85 if (fgets(cmdline, sizeof(cmdline), stdin) == 0)
86 quit();
87 if (cmdline[0] == 0)
88 break;
89 makeargv();
90 if (margv[0] == 0)
91 continue;
92 c = getcmd(margv[0]);
93 if (c == (struct cmd *)-1) {
94 printf("?Ambiguous command\n");
95 continue;
96 }
97 if (c == 0) {
98 printf("?Invalid command\n");
99 continue;
100 }
101 if (c->c_priv && getuid()) {
102 printf("?Privileged command\n");
103 continue;
104 }
105 (*c->c_handler)(margc, margv);
106 }
107 return 0;
108 }
109
110 void
intr(signo)111 intr(signo)
112 int signo;
113 {
114 if (!fromatty)
115 exit(0);
116 longjmp(toplevel, 1);
117 }
118
119
120 static struct cmd *
getcmd(name)121 getcmd(name)
122 char *name;
123 {
124 register char *p, *q;
125 register struct cmd *c, *found;
126 register int nmatches, longest;
127 extern int NCMDS;
128
129 longest = 0;
130 nmatches = 0;
131 found = 0;
132 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
133 p = c->c_name;
134 for (q = name; *q == *p++; q++)
135 if (*q == 0) /* exact match? */
136 return(c);
137 if (!*q) { /* the name was a prefix */
138 if (q - name > longest) {
139 longest = q - name;
140 nmatches = 1;
141 found = c;
142 } else if (q - name == longest)
143 nmatches++;
144 }
145 }
146 if (nmatches > 1)
147 return((struct cmd *)-1);
148 return(found);
149 }
150
151 /*
152 * Slice a string up into argc/argv.
153 */
154 void
makeargv()155 makeargv()
156 {
157 register char *cp;
158 register char **argp = margv;
159
160 margc = 0;
161 for (cp = cmdline; *cp;) {
162 while (isspace(*cp))
163 cp++;
164 if (*cp == '\0')
165 break;
166 *argp++ = cp;
167 margc += 1;
168 while (*cp != '\0' && !isspace(*cp))
169 cp++;
170 if (*cp == '\0')
171 break;
172 *cp++ = '\0';
173 }
174 *argp++ = 0;
175 }
176
177 #define HELPINDENT (sizeof ("directory"))
178
179 /*
180 * Help command.
181 */
182 void
help(argc,argv)183 help(argc, argv)
184 int argc;
185 char *argv[];
186 {
187 register struct cmd *c;
188
189 if (argc == 1) {
190 register int i, j, w;
191 int columns, width = 0, lines;
192 extern int NCMDS;
193
194 printf("Commands may be abbreviated. Commands are:\n\n");
195 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
196 int len = strlen(c->c_name);
197
198 if (len > width)
199 width = len;
200 }
201 width = (width + 8) &~ 7;
202 columns = 80 / width;
203 if (columns == 0)
204 columns = 1;
205 lines = (NCMDS + columns - 1) / columns;
206 for (i = 0; i < lines; i++) {
207 for (j = 0; j < columns; j++) {
208 c = cmdtab + j * lines + i;
209 printf("%s", c->c_name);
210 if (c + lines >= &cmdtab[NCMDS]) {
211 printf("\n");
212 break;
213 }
214 w = strlen(c->c_name);
215 while (w < width) {
216 w = (w + 8) &~ 7;
217 putchar('\t');
218 }
219 }
220 }
221 return;
222 }
223 while (--argc > 0) {
224 register char *arg;
225 arg = *++argv;
226 c = getcmd(arg);
227 if (c == (struct cmd *)-1)
228 printf("?Ambiguous help command %s\n", arg);
229 else if (c == (struct cmd *)0)
230 printf("?Invalid help command %s\n", arg);
231 else
232 printf("%-*s\t%s\n", (int)HELPINDENT,
233 c->c_name, c->c_help);
234 }
235 }
236