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
|
/* Utility functions for finding files relative to GCC binaries.
Copyright (C) 1992-2015 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "filenames.h"
#include "file-find.h"
static bool debug = false;
void
find_file_set_debug (bool debug_state)
{
debug = debug_state;
}
char *
find_a_file (struct path_prefix *pprefix, const char *name, int mode)
{
char *temp;
struct prefix_list *pl;
int len = pprefix->max_len + strlen (name) + 1;
if (debug)
fprintf (stderr, "Looking for '%s'\n", name);
#ifdef HOST_EXECUTABLE_SUFFIX
len += strlen (HOST_EXECUTABLE_SUFFIX);
#endif
temp = XNEWVEC (char, len);
/* Determine the filename to execute (special case for absolute paths). */
if (IS_ABSOLUTE_PATH (name))
{
if (access (name, mode) == 0)
{
strcpy (temp, name);
if (debug)
fprintf (stderr, " - found: absolute path\n");
return temp;
}
#ifdef HOST_EXECUTABLE_SUFFIX
/* Some systems have a suffix for executable files.
So try appending that. */
strcpy (temp, name);
strcat (temp, HOST_EXECUTABLE_SUFFIX);
if (access (temp, mode) == 0)
return temp;
#endif
if (debug)
fprintf (stderr, " - failed to locate using absolute path\n");
}
else
for (pl = pprefix->plist; pl; pl = pl->next)
{
struct stat st;
strcpy (temp, pl->prefix);
strcat (temp, name);
if (stat (temp, &st) >= 0
&& ! S_ISDIR (st.st_mode)
&& access (temp, mode) == 0)
return temp;
#ifdef HOST_EXECUTABLE_SUFFIX
/* Some systems have a suffix for executable files.
So try appending that. */
strcat (temp, HOST_EXECUTABLE_SUFFIX);
if (stat (temp, &st) >= 0
&& ! S_ISDIR (st.st_mode)
&& access (temp, mode) == 0)
return temp;
#endif
}
if (debug && pprefix->plist == NULL)
fprintf (stderr, " - failed: no entries in prefix list\n");
free (temp);
return 0;
}
/* Add an entry for PREFIX to prefix list PREFIX.
Add at beginning if FIRST is true. */
void
do_add_prefix (struct path_prefix *pprefix, const char *prefix, bool first)
{
struct prefix_list *pl, **prev;
int len;
if (pprefix->plist && !first)
{
for (pl = pprefix->plist; pl->next; pl = pl->next)
;
prev = &pl->next;
}
else
prev = &pprefix->plist;
/* Keep track of the longest prefix. */
len = strlen (prefix);
if (len > pprefix->max_len)
pprefix->max_len = len;
pl = XNEW (struct prefix_list);
pl->prefix = xstrdup (prefix);
if (*prev)
pl->next = *prev;
else
pl->next = (struct prefix_list *) 0;
*prev = pl;
}
/* Add an entry for PREFIX at the end of prefix list PREFIX. */
void
add_prefix (struct path_prefix *pprefix, const char *prefix)
{
do_add_prefix (pprefix, prefix, false);
}
/* Add an entry for PREFIX at the begin of prefix list PREFIX. */
void
add_prefix_begin (struct path_prefix *pprefix, const char *prefix)
{
do_add_prefix (pprefix, prefix, true);
}
/* Take the value of the environment variable ENV, break it into a path, and
add of the entries to PPREFIX. */
void
prefix_from_env (const char *env, struct path_prefix *pprefix)
{
const char *p;
p = getenv (env);
if (p)
prefix_from_string (p, pprefix);
}
void
prefix_from_string (const char *p, struct path_prefix *pprefix)
{
const char *startp, *endp;
char *nstore = XNEWVEC (char, strlen (p) + 3);
if (debug)
fprintf (stderr, "Convert string '%s' into prefixes, separator = '%c'\n", p, PATH_SEPARATOR);
startp = endp = p;
while (1)
{
if (*endp == PATH_SEPARATOR || *endp == 0)
{
strncpy (nstore, startp, endp-startp);
if (endp == startp)
{
strcpy (nstore, "./");
}
else if (! IS_DIR_SEPARATOR (endp[-1]))
{
nstore[endp-startp] = DIR_SEPARATOR;
nstore[endp-startp+1] = 0;
}
else
nstore[endp-startp] = 0;
if (debug)
fprintf (stderr, " - add prefix: %s\n", nstore);
add_prefix (pprefix, nstore);
if (*endp == 0)
break;
endp = startp = endp + 1;
}
else
endp++;
}
free (nstore);
}
|
