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1 /*
2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7 * Reserved. This file contains Original Code and/or Modifications of
8 * Original Code as defined in and that are subject to the Apple Public
9 * Source License Version 1.0 (the 'License'). You may not use this file
10 * except in compliance with the License. Please obtain a copy of the
11 * License at http://www.apple.com/publicsource and read it before using
12 * this file.
13 *
14 * The Original Code and all software distributed under the License are
15 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19 * License for the specific language governing rights and limitations
20 * under the License."
21 *
22 * @APPLE_LICENSE_HEADER_END@
23 */
24 /*
25 * Copyright (c) 1993
26 * The Regents of the University of California. All rights reserved.
27 *
28 * Redistribution and use in source and binary forms, with or without
29 * modification, are permitted provided that the following conditions
30 * are met:
31 * 1. Redistributions of source code must retain the above copyright
32 * notice, this list of conditions and the following disclaimer.
33 * 2. Redistributions in binary form must reproduce the above copyright
34 * notice, this list of conditions and the following disclaimer in the
35 * documentation and/or other materials provided with the distribution.
36 * 3. All advertising materials mentioning features or use of this software
37 * must display the following acknowledgement:
38 * This product includes software developed by the University of
39 * California, Berkeley and its contributors.
40 * 4. Neither the name of the University nor the names of its contributors
41 * may be used to endorse or promote products derived from this software
42 * without specific prior written permission.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
47 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54 * SUCH DAMAGE.
55 */
56
57 #ifndef lint
58 static char copyright[] =
59 "@(#) Copyright (c) 1993\n\
60 The Regents of the University of California. All rights reserved.\n";
61 #endif /* not lint */
62
63 #ifndef lint
64 static char sccsid[] = "@(#)pathconf.c 8.1 (Berkeley) 6/6/93";
65 #endif /* not lint */
66
67 #include <sys/param.h>
68 #include <sys/sysctl.h>
69 #include <sys/unistd.h>
70
71 #include <errno.h>
72 #include <stdio.h>
73 #include <stdlib.h>
74 #include <string.h>
75
76 #define PC_NAMES { \
77 { 0, 0 }, \
78 { "link_max", CTLTYPE_INT }, \
79 { "max_canon", CTLTYPE_INT }, \
80 { "max_input", CTLTYPE_INT }, \
81 { "name_max", CTLTYPE_INT }, \
82 { "path_max", CTLTYPE_INT }, \
83 { "pipe_buf", CTLTYPE_INT }, \
84 { "chown_restricted", CTLTYPE_INT }, \
85 { "no_trunc", CTLTYPE_INT }, \
86 { "vdisable", CTLTYPE_INT }, \
87 }
88 #define PC_MAXID 10
89
90 struct ctlname pcnames[] = PC_NAMES;
91 char names[BUFSIZ];
92
93 struct list {
94 struct ctlname *list;
95 int size;
96 };
97 struct list pclist = { pcnames, PC_MAXID };
98
99 int Aflag, aflag, nflag, wflag, stdinflag;
100
101 int
102 main(argc, argv)
103 int argc;
104 char *argv[];
105 {
106 extern char *optarg;
107 extern int optind;
108 char *path;
109 int ch;
110
111 while ((ch = getopt(argc, argv, "Aan")) != EOF) {
112 switch (ch) {
113
114 case 'A':
115 Aflag = 1;
116 break;
117
118 case 'a':
119 aflag = 1;
120 break;
121
122 case 'n':
123 nflag = 1;
124 break;
125
126 default:
127 usage();
128 }
129 }
130 argc -= optind;
131 argv += optind;
132
133 if (argc == 0)
134 usage();
135 path = *argv++;
136 if (strcmp(path, "-") == 0)
137 stdinflag = 1;
138 argc--;
139 if (Aflag || aflag) {
140 listall(path, &pclist);
141 exit(0);
142 }
143 if (argc == 0)
144 usage();
145 while (argc-- > 0)
146 parse(path, *argv, 1);
147 exit(0);
148 }
149
150 /*
151 * List all variables known to the system.
152 */
153 listall(path, lp)
154 char *path;
155 struct list *lp;
156 {
157 int lvl2;
158
159 if (lp->list == 0)
160 return;
161 for (lvl2 = 0; lvl2 < lp->size; lvl2++) {
162 if (lp->list[lvl2].ctl_name == 0)
163 continue;
164 parse(path, lp->list[lvl2].ctl_name, Aflag);
165 }
166 }
167
168 /*
169 * Parse a name into an index.
170 * Lookup and print out the attribute if it exists.
171 */
172 parse(pathname, string, flags)
173 char *pathname;
174 char *string;
175 int flags;
176 {
177 int indx, value;
178 char *bufp, buf[BUFSIZ];
179
180 bufp = buf;
181 snprintf(buf, BUFSIZ, "%s", string);
182 if ((indx = findname(string, "top", &bufp, &pclist)) == -1)
183 return;
184 if (bufp) {
185 fprintf(stderr, "name %s in %s is unknown\n", *bufp, string);
186 return;
187 }
188 if (stdinflag)
189 value = fpathconf(0, indx);
190 else
191 value = pathconf(pathname, indx);
192 if (value == -1) {
193 if (flags == 0)
194 return;
195 switch (errno) {
196 case ENOTSUP:
197 fprintf(stderr, "%s: value is not available\n", string);
198 return;
199 case ENOTDIR:
200 fprintf(stderr, "%s: specification is incomplete\n",
201 string);
202 return;
203 case ENOMEM:
204 fprintf(stderr, "%s: type is unknown to this program\n",
205 string);
206 return;
207 default:
208 perror(string);
209 return;
210 }
211 }
212 if (!nflag)
213 fprintf(stdout, "%s = ", string);
214 fprintf(stdout, "%d\n", value);
215 }
216
217 /*
218 * Scan a list of names searching for a particular name.
219 */
220 findname(string, level, bufp, namelist)
221 char *string;
222 char *level;
223 char **bufp;
224 struct list *namelist;
225 {
226 char *name;
227 int i;
228
229 if (namelist->list == 0 || (name = strsep(bufp, ".")) == NULL) {
230 fprintf(stderr, "%s: incomplete specification\n", string);
231 return (-1);
232 }
233 for (i = 0; i < namelist->size; i++)
234 if (namelist->list[i].ctl_name != NULL &&
235 strcmp(name, namelist->list[i].ctl_name) == 0)
236 break;
237 if (i == namelist->size) {
238 fprintf(stderr, "%s level name %s in %s is invalid\n",
239 level, name, string);
240 return (-1);
241 }
242 return (i);
243 }
244
245 usage()
246 {
247
248 (void)fprintf(stderr, "usage:\t%s\n\t%s\n\t%s\n",
249 "pathname [-n] variable ...",
250 "pathname [-n] -a", "pathname [-n] -A");
251 exit(1);
252 }