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
|
/*************************************************************************\
* Copyright (C) Michael Kerrisk, 2018. *
* *
* This program is free software. You may use, modify, and redistribute 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. This program is distributed without any warranty. See *
* the file COPYING.gpl-v3 for details. *
\*************************************************************************/
/* Listing 57-4 */
/* us_xfr_cl.c
An example UNIX domain stream socket client. This client transmits contents
of stdin to a server socket.
See also us_xfr_sv.c.
*/
#include "us_xfr.h"
int
main(int argc, char *argv[])
{
struct sockaddr_un addr;
int sfd;
ssize_t numRead;
char buf[BUF_SIZE];
sfd = socket(AF_UNIX, SOCK_STREAM, 0); /* Create client socket */
if (sfd == -1)
errExit("socket");
/* Construct server address, and make the connection */
memset(&addr, 0, sizeof(struct sockaddr_un));
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, SV_SOCK_PATH, sizeof(addr.sun_path) - 1);
if (connect(sfd, (struct sockaddr *) &addr,
sizeof(struct sockaddr_un)) == -1)
errExit("connect");
/* Copy stdin to socket */
while ((numRead = read(STDIN_FILENO, buf, BUF_SIZE)) > 0)
if (write(sfd, buf, numRead) != numRead)
fatal("partial/failed write");
if (numRead == -1)
errExit("read");
exit(EXIT_SUCCESS); /* Closes our socket; server sees EOF */
}
|
