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
|
#include <string.h>
#include <unistd.h>
#include "config.h"
#include "compat.h"
#include "error.h"
#include "threads.h"
#include "export.h"
#include "compress.h"
#include "stream.h"
VISIBILITY_ENABLE
#include "ttyrec.h"
VISIBILITY_DISABLE
// disabled: #ifdef HAVE_FORK
#if 0
int filter(void func(int,int,const char*), int fd, int wr, const char *arg, const char **error)
{
int p[2];
if (pipe(p))
{
close(fd);
return -1;
}
switch (fork())
{
case -1:
*error="fork() failed";
close(fd);
close(p[0]);
close(p[1]);
return -1;
case 0:
close(p[wr]);
func(fd, p[!wr], arg);
exit(0);
default:
close(p[!wr]);
}
return p[wr];
}
#else
struct filterdata
{
int fdin, fdout;
void (*func)(int,int,const char*);
const char *arg;
};
static int nstreams=-1;
static cond_t exitcond;
static mutex_t nsm;
static void filterthr(struct filterdata *args)
{
int fdin, fdout;
void (*func)(int,int,const char*);
const char *arg;
fdin=args->fdin;
fdout=args->fdout;
func=args->func;
arg=args->arg;
free(args);
func(fdin, fdout, arg);
mutex_lock(nsm);
if (!--nstreams)
cond_wake(exitcond);
mutex_unlock(nsm);
}
static void finish_up(void)
{
mutex_lock(nsm);
while (nstreams)
{
cond_wait(exitcond, nsm);
}
mutex_unlock(nsm);
}
#ifdef IS_WIN32
// Because of a bug in Windows' atexit, we need to export this function
// then call it manually from users.
export void reap_streams(void)
{
finish_up();
}
#endif
int filter(void func(int,int,const char*), int fd, int wr, const char *arg, const char **error)
{
int p[2];
struct filterdata *fdata;
thread_t th;
if (pipe(p))
goto failpipe;
if (!(fdata=malloc(sizeof(struct filterdata))))
goto failfdata;
fdata->fdin=fd;
fdata->fdout=p[!wr];
fdata->func=func;
fdata->arg=arg;
if (nstreams==-1)
{
mutex_init(nsm);
cond_init(exitcond);
nstreams=0;
atexit(finish_up);
}
mutex_lock(nsm);
if (thread_create_detached(&th, filterthr, fdata))
goto failthread;
nstreams++;
mutex_unlock(nsm);
return p[wr];
failthread:
*error="Couldn't create thread";
mutex_unlock(nsm);
free(fdata);
failfdata:
close(p[0]);
close(p[1]);
failpipe:
close(fd);
return -1;
}
#endif
export int open_stream(int fd, const char* url, int mode, const char **error)
{
int wr= !!(mode&SM_WRITE);
compress_info *ci;
const char *dummy;
if (fd==-1)
{
if (!url)
return -1;
if (!error)
error=&dummy;
if (!strcmp(url, "-"))
fd=dup(wr? 1 : 0);
else if (match_prefix(url, "file://"))
fd=open_file(url+7, mode, error);
else if (match_prefix(url, "tcp://"))
fd=open_tcp(url+6, mode, error);
else if (match_prefix(url, "telnet://"))
fd=open_telnet(url+9, mode, error);
else if (match_prefix(url, "termcast://"))
fd=open_termcast(url+11, mode, error);
#ifdef HAVE_CURL_CURL_H
else if (strstr(url, "://"))
fd=open_curl(url, mode, error);
#endif
else
fd=open_file(url, mode, error);
}
if (fd==-1)
return -1;
ci=comp_from_ext(url, wr? compressors : decompressors);
if (!ci)
return fd;
return filter(ci->comp, fd, wr, 0, error);
}
|
