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
|
/* Copyright 2016
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdarg.h>
#include <wchar.h>
#include <signal.h>
#include <stdlib.h>
#include <stddef.h>
#include <ftw.h>
#include "config.h"
#include ALLOCA_H
#include "lib.h"
#include "gc.h"
#include "args.h"
#include "utf8.h"
#include "eval.h"
#include "signal.h"
#include "unwind.h"
#include "sysif.h"
#include "ftw.h"
static val s_callback;
static uw_frame_t *s_exit_point;
static int ftw_callback(const char *c_path, const struct stat *c_sb,
int c_type, struct FTW *fb)
{
int c_result = 1;
uw_frame_t cont_guard;
uw_push_guard(&cont_guard);
uw_simple_catch_begin;
sig_check_fast();
{
val path = string_utf8(c_path);
val type = num(c_type);
val sb = stat_to_struct(*c_sb);
val level = num(fb->level);
val base = num(fb->base);
val result;
args_decl(args, ARGS_MIN);
args_add5(args, path, type, sb, level, base);
result = generic_funcall(s_callback, args);
c_result = if3(integerp(result), c_num(result), 0);
}
uw_unwind {
s_exit_point = uw_curr_exit_point;
uw_curr_exit_point = 0; /* stops unwinding */
}
uw_catch_end;
uw_pop_frame(&cont_guard);
return c_result;
}
val ftw_wrap(val dirpath, val fn, val flags_in, val nopenfd_in)
{
if (s_callback) {
uw_throwf(error_s, lit("ftw: cannot be re-entered from "
"ftw callback"), nao);
} else if (dirpath == nil) {
return t;
} else if (consp(dirpath)) {
uses_or2;
val ret = nil;
for (; dirpath; dirpath = cdr(dirpath)) {
val res = ftw_wrap(car(dirpath), fn, flags_in, nopenfd_in);
if (res != t && res != nil)
return res;
ret = or2(ret, res);
}
return ret;
} else {
int nopenfd = c_num(default_arg(nopenfd_in, num_fast(20)));
int flags = c_num(default_arg(flags_in, zero));
char *dirpath_u8 = utf8_dup_to(c_str(dirpath));
int res = (s_callback = fn,
nftw(dirpath_u8, ftw_callback, nopenfd, flags));
s_callback = nil;
free(dirpath_u8);
if (s_exit_point) {
uw_frame_t *ep = s_exit_point;
s_exit_point = 0;
uw_continue(ep);
}
switch (res) {
case 0:
return t;
case -1:
return nil;
default:
return num(res);
}
}
}
void ftw_init(void)
{
prot1(&s_callback);
/* ftw flags */
#ifdef FTW_PHYS
reg_varl(intern(lit("ftw-phys"), user_package), num_fast(FTW_PHYS));
#endif
#ifdef FTW_MOUNT
reg_varl(intern(lit("ftw-mount"), user_package), num_fast(FTW_MOUNT));
#endif
#ifdef FTW_CHDIR
reg_varl(intern(lit("ftw-chdir"), user_package), num_fast(FTW_CHDIR));
#endif
#ifdef FTW_DEPTH
reg_varl(intern(lit("ftw-depth"), user_package), num_fast(FTW_DEPTH));
#endif
#ifdef FTW_ACTIONRETVAL
reg_varl(intern(lit("ftw-actionretval"), user_package), num_fast(FTW_ACTIONRETVAL));
#endif
/* callback type codes */
#ifdef FTW_F
reg_varl(intern(lit("ftw-f"), user_package), num_fast(FTW_F));
#endif
#ifdef FTW_D
reg_varl(intern(lit("ftw-d"), user_package), num_fast(FTW_D));
#endif
#ifdef FTW_DNR
reg_varl(intern(lit("ftw-dnr"), user_package), num_fast(FTW_DNR));
#endif
#ifdef FTW_NS
reg_varl(intern(lit("ftw-ns"), user_package), num_fast(FTW_NS));
#endif
#ifdef FTW_SL
reg_varl(intern(lit("ftw-sl"), user_package), num_fast(FTW_SL));
#endif
#ifdef FTW_DP
reg_varl(intern(lit("ftw-dp"), user_package), num_fast(FTW_DP));
#endif
#ifdef FTW_SLN
reg_varl(intern(lit("ftw-sln"), user_package), num_fast(FTW_SLN));
#endif
/* callback return values */
#ifdef FTW_CONTINUE
reg_varl(intern(lit("ftw-continue"), user_package), num_fast(FTW_CONTINUE));
#endif
#ifdef FTW_STOP
reg_varl(intern(lit("ftw-stop"), user_package), num_fast(FTW_STOP));
#endif
#ifdef FTW_SKIP_SUBTREE
reg_varl(intern(lit("ftw-skip-subtree"), user_package), num_fast(FTW_SKIP_SUBTREE));
#endif
#ifdef FTW_SKIP_SIBLINGS
reg_varl(intern(lit("ftw-skip-siblings"), user_package), num_fast(FTW_SKIP_SIBLINGS));
#endif
reg_fun(intern(lit("ftw"), user_package), func_n4o(ftw_wrap, 2));
}
|
