drm/i915: Fix hangs on some broadwell machines
[dragonfly.git] / contrib / amd / libamu / util.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1997-1999 Erez Zadok
3 * Copyright (c) 1990 Jan-Simon Pendry
4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgment:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * %W% (Berkeley) %G%
40 *
41 * $Id: util.c,v 1.2 1999/01/10 21:54:39 ezk Exp $
42 *
43 */
44
45/*
46 * General Utilities.
47 */
48
49#ifdef HAVE_CONFIG_H
50# include <config.h>
51#endif /* HAVE_CONFIG_H */
52#include <am_defs.h>
53#include <amu.h>
54
55
56char *
57strnsave(const char *str, int len)
58{
59 char *sp = (char *) xmalloc(len + 1);
60 memmove(sp, str, len);
61 sp[len] = 0;
62
63 return sp;
64}
65
66
67/*
68 * Concatenate three strings and store in buffer pointed to
69 * by p, making p large enough to hold the strings
70 */
71char *
72str3cat(char *p, char *s1, char *s2, char *s3)
73{
74 int l1 = strlen(s1);
75 int l2 = strlen(s2);
76 int l3 = strlen(s3);
77
78 p = (char *) xrealloc(p, l1 + l2 + l3 + 1);
79 memmove(p, s1, l1);
80 memmove(p + l1, s2, l2);
81 memmove(p + l1 + l2, s3, l3 + 1);
82 return p;
83}
84
85
86/*
87 * Make all the directories in the path.
88 */
89int
90mkdirs(char *path, int mode)
91{
92 /*
93 * take a copy in case path is in readonly store
94 */
95 char *p2 = strdup(path);
96 char *sp = p2;
97 struct stat stb;
98 int error_so_far = 0;
99
100 /*
101 * Skip through the string make the directories.
102 * Mostly ignore errors - the result is tested at the end.
103 *
104 * This assumes we are root so that we can do mkdir in a
105 * mode 555 directory...
106 */
107 while ((sp = strchr(sp + 1, '/'))) {
108 *sp = '\0';
109 if (mkdir(p2, mode) < 0) {
110 error_so_far = errno;
111 } else {
112#ifdef DEBUG
113 dlog("mkdir(%s)", p2);
114#endif /* DEBUG */
115 }
116 *sp = '/';
117 }
118
119 if (mkdir(p2, mode) < 0) {
120 error_so_far = errno;
121 } else {
122#ifdef DEBUG
123 dlog("mkdir(%s)", p2);
124#endif /* DEBUG */
125 }
126
127 XFREE(p2);
128
129 return stat(path, &stb) == 0 &&
130 (stb.st_mode & S_IFMT) == S_IFDIR ? 0 : error_so_far;
131}
132
133
134/*
135 * Remove as many directories in the path as possible.
136 * Give up if the directory doesn't appear to have
137 * been created by Amd (not mode dr-x) or an rmdir
138 * fails for any reason.
139 */
140void
141rmdirs(char *dir)
142{
143 char *xdp = strdup(dir);
144 char *dp;
145
146 do {
147 struct stat stb;
148 /*
149 * Try to find out whether this was
150 * created by amd. Do this by checking
151 * for owner write permission.
152 */
153 if (stat(xdp, &stb) == 0 && (stb.st_mode & 0200) == 0) {
154 if (rmdir(xdp) < 0) {
155 if (errno != ENOTEMPTY &&
156 errno != EBUSY &&
157 errno != EEXIST &&
158 errno != EINVAL)
159 plog(XLOG_ERROR, "rmdir(%s): %m", xdp);
160 break;
161 } else {
162#ifdef DEBUG
163 dlog("rmdir(%s)", xdp);
164#endif /* DEBUG */
165 }
166 } else {
167 break;
168 }
169
170 dp = strrchr(xdp, '/');
171 if (dp)
172 *dp = '\0';
173 } while (dp && dp > xdp);
174
175 XFREE(xdp);
176}