1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
* $Id: shlib.c,v 1.5 1993/12/04 00:53:02 jkh Exp $
*/
#include <sys/param.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <fcntl.h>
#include <string.h>
#include <ctype.h>
#include <dirent.h>
#include <a.out.h>
#include "ld.h"
#ifdef SUNOS4
char *strsep();
#endif
/*
* Standard directories to search for files specified by -l.
*/
#ifndef STANDARD_SEARCH_DIRS
#define STANDARD_SEARCH_DIRS "/usr/lib", "/usr/X386/lib", "/usr/local/lib"
#endif
char *standard_search_dirs[] = {
STANDARD_SEARCH_DIRS
};
int n_search_dirs;
void
add_search_dir(name)
char *name;
{
n_search_dirs++;
search_dirs = (char **)xrealloc(search_dirs,
n_search_dirs * sizeof(char *));
search_dirs[n_search_dirs - 1] = strdup(name);
}
void
std_search_dirs(paths)
char *paths;
{
char *cp;
int i, n;
if (paths != NULL)
/* Add search directories from `paths' */
while ((cp = strsep(&paths, ":")) != NULL) {
add_search_dir(cp);
if (paths)
*(paths-1) = ':';
}
/* Append standard search directories */
n = sizeof standard_search_dirs / sizeof standard_search_dirs[0];
for (i = 0; i < n; i++)
add_search_dir(standard_search_dirs[i]);
}
/*
* Return true if CP points to a valid dewey number.
* Decode and leave the result in the array DEWEY.
* Return the number of decoded entries in DEWEY.
*/
int
getdewey(dewey, cp)
int dewey[];
char *cp;
{
int i, n;
for (n = 0, i = 0; i < MAXDEWEY; i++) {
if (*cp == '\0')
break;
if (*cp == '.') cp++;
if (!isdigit(*cp))
return 0;
dewey[n++] = strtol(cp, &cp, 10);
}
return n;
}
/*
* Compare two dewey arrays.
* Return -1 if `d1' represents a smaller value than `d2'.
* Return 1 if `d1' represents a greater value than `d2'.
* Return 0 if equal.
*/
int
cmpndewey(d1, n1, d2, n2)
int d1[], d2[];
int n1, n2;
{
int i;
for (i = 0; i < n1 && i < n2; i++) {
if (d1[i] < d2[i])
return -1;
if (d1[i] > d2[i])
return 1;
}
if (n1 == n2)
return 0;
if (i == n1)
return -1;
if (i == n2)
return 1;
}
/*
* Search directories for a shared library matching the given
* major and minor version numbers.
*
* MAJOR == -1 && MINOR == -1 --> find highest version
* MAJOR != -1 && MINOR == -1 --> find highest minor version
* MAJOR == -1 && MINOR != -1 --> invalid
* MAJOR != -1 && MINOR != -1 --> find highest micro version
*/
/* Not interested in devices right now... */
#undef major
#undef minor
char *
findshlib(name, majorp, minorp, do_dot_a)
char *name;
int *majorp, *minorp;
int do_dot_a;
{
int dewey[MAXDEWEY];
int ndewey;
int tmp[MAXDEWEY];
int i;
int len;
char *lname, *path = NULL;
int major = *majorp, minor = *minorp;
len = strlen(name);
lname = (char *)alloca(len + sizeof("lib"));
sprintf(lname, "lib%s", name);
len += 3;
ndewey = 0;
for (i = 0; i < n_search_dirs; i++) {
DIR *dd = opendir(search_dirs[i]);
struct dirent *dp;
int found_dot_a = 0;
if (dd == NULL)
continue;
while ((dp = readdir(dd)) != NULL) {
int n, j, might_take_it = 0;
if (do_dot_a && path == NULL &&
dp->d_namlen == len + 2 &&
strncmp(dp->d_name, lname, len) == 0 &&
(dp->d_name+len)[0] == '.' &&
(dp->d_name+len)[1] == 'a') {
path = concat(search_dirs[i], "/", dp->d_name);
found_dot_a = 1;
}
if (dp->d_namlen < len + 4)
continue;
if (strncmp(dp->d_name, lname, len) != 0)
continue;
if (strncmp(dp->d_name+len, ".so.", 4) != 0)
continue;
if ((n = getdewey(tmp, dp->d_name+len+4)) == 0)
continue;
if (major != -1 && found_dot_a) { /* XXX */
free(path);
path = NULL;
found_dot_a = 0;
}
if (major == -1 && minor == -1) {
might_take_it = 1;
} else if (major != -1 && minor == -1) {
if (tmp[0] == major)
might_take_it = 1;
} else if (major != -1 && minor != -1) {
if (tmp[0] == major)
if (n == 1 || tmp[1] >= minor)
might_take_it = 1;
}
if (!might_take_it)
continue;
if (cmpndewey(tmp, n, dewey, ndewey) <= 0)
continue;
/* We have a better version */
if (path)
free(path);
path = concat(search_dirs[i], "/", dp->d_name);
found_dot_a = 0;
bcopy(tmp, dewey, sizeof(dewey));
ndewey = n;
*majorp = dewey[0];
*minorp = dewey[1];
}
closedir(dd);
if (found_dot_a)
/*
* There's a .a archive here.
*/
return path;
}
return path;
}
|