Epson TM-T20II UB-R04 Technical Reference Guide - Page 51

For Linux, sockfd = socketAF_INET, SOCK_STREAM

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Chapter 4 Programming Samples For Linux The program is a sample of printing "EPSON UB-R04" to a TM printer with the UB-R04 from the Linux shell, through the Ethernet connection. TCP9100 programming sample for linux * HOW TO BUILD * cc tcp9100.c */ #include #include #include #include #include #include int main(int argc, char* argv[]) { int sockfd; struct sockaddr_in addr; if (argc != 2) { printf("usage: tcp9100 IP_ADDRESS\n"); exit(1); } /* create socket */ sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd < 0) { perror("socket()"); exit(1); } /* initialize the parameter */ 4 memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(9100); addr.sin_addr.s_addr = inet_addr(argv[1]); /* connect */ if (connect(sockfd, (struct sockaddr*)&addr, sizeof(addr)) < 0) { perror("connect()"); } printf("connected\n"); /* send data */ send(sockfd, "EPSON UB-R04\x0a", 13, 0); /* close socket */ close(sockfd); return 0 51

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Chapter 4
Programming Samples
51
4
For Linux
The program is a sample of printing "EPSON UB-R04" to a TM printer with the UB-R04 from the Linux
shell, through the Ethernet connection.
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/* TCP9100 programming sample for linux
* HOW TO BUILD
*
cc tcp9100.c
*/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
int main(int argc, char* argv[])
{
int sockfd;
struct sockaddr_in addr;
if (argc != 2) {
printf("usage: tcp9100 IP_ADDRESS\n");
exit(1);
}
/* create socket */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
perror("socket()");
exit(1);
}
/* initialize the parameter */
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(9100);
addr.sin_addr.s_addr = inet_addr(argv[1]);
/* connect */
if (connect(sockfd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
perror("connect()");
}
printf("connected\n");
/* send data */
send(sockfd, "EPSON UB-R04\x0a", 13, 0);
/* close socket */
close(sockfd);
return 0;
}
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