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
|
/* Copyright (C) 2017 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <arpa/inet.h>
#include <err.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sysexits.h>
#include <unistd.h>
typedef unsigned char byte;
static void spawn(const char *cmd, const char *arg, int dest, int src) {
pid_t pid = fork();
if (pid < 0) err(EX_OSERR, "fork");
if (pid) {
int status;
pid_t dead = waitpid(pid, &status, 0);
if (dead < 0) err(EX_OSERR, "waitpid(%d)", pid);
if (status) warnx("%s: status %d", cmd, status);
} else {
int fd = dup2(src, dest);
if (fd < 0) err(EX_OSERR, "dup2");
execlp(cmd, cmd, arg, NULL);
err(EX_UNAVAILABLE, "%s", cmd);
}
}
static int pbd(void) {
int error;
int server = socket(PF_INET, SOCK_STREAM, 0);
if (server < 0) err(EX_OSERR, "socket");
error = fcntl(server, F_SETFD, FD_CLOEXEC);
if (error) err(EX_IOERR, "fcntl");
struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_port = htons(7062),
.sin_addr = { .s_addr = htonl(0x7F000001) },
};
error = bind(server, (struct sockaddr *)&addr, sizeof(addr));
if (error) err(EX_UNAVAILABLE, "bind");
error = listen(server, 0);
if (error) err(EX_UNAVAILABLE, "listen");
for (;;) {
int client = accept(server, NULL, NULL);
if (client < 0) err(EX_IOERR, "accept");
error = fcntl(client, F_SETFD, FD_CLOEXEC);
if (error) err(EX_IOERR, "fcntl");
char c = 0;
ssize_t size = read(client, &c, 1);
if (size < 0) warn("read");
switch (c) {
break; case 'p': spawn("pbpaste", NULL, STDOUT_FILENO, client);
break; case 'c': spawn("pbcopy", NULL, STDIN_FILENO, client);
break; case 'o': spawn("xargs", "open", STDIN_FILENO, client);
}
close(client);
}
}
static int pbdClient(char c) {
int client = socket(PF_INET, SOCK_STREAM, 0);
if (client < 0) err(EX_OSERR, "socket");
struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_port = htons(7062),
.sin_addr = { .s_addr = htonl(0x7F000001) },
};
int error = connect(client, (struct sockaddr *)&addr, sizeof(addr));
if (error) err(EX_UNAVAILABLE, "connect");
ssize_t size = write(client, &c, 1);
if (size < 0) err(EX_IOERR, "write");
return client;
}
static void copy(int out, int in) {
byte buf[4096];
ssize_t readSize;
while (0 < (readSize = read(in, buf, sizeof(buf)))) {
ssize_t writeSize = write(out, buf, readSize);
if (writeSize < 0) err(EX_IOERR, "write(%d)", out);
}
if (readSize < 0) err(EX_IOERR, "read(%d)", in);
}
static int pbcopy(void) {
int client = pbdClient('c');
copy(client, STDIN_FILENO);
return EX_OK;
}
static int pbpaste(void) {
int client = pbdClient('p');
copy(STDOUT_FILENO, client);
return EX_OK;
}
static int open1(const char *url) {
if (!url) return EX_USAGE;
int client = pbdClient('o');
ssize_t size = write(client, url, strlen(url));
if (size < 0) err(EX_IOERR, "write");
return EX_OK;
}
int main(int argc, char *argv[]) {
(void)argc;
if (!argv[0][0] || !argv[0][1]) return EX_USAGE;
switch (argv[0][2]) {
case 'd': return pbd();
case 'c': return pbcopy();
case 'p': return pbpaste();
case 'e': return open1(argv[1]);
default: return EX_USAGE;
}
}
|