80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
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// https://systemprogrammingatntu.github.io/mp2/unix_socket.html
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#define SOCKET_NAME "/tmp/resol.sock"
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#define BUFFER_SIZE 12
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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int main(int argc, char *argv[]) {
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struct sockaddr_un addr;
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int i;
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int ret;
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int data_socket;
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char buffer[BUFFER_SIZE];
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/* Create local socket. */
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data_socket = socket(AF_UNIX, SOCK_STREAM, 0);
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if (data_socket == -1) {
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perror("socket");
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exit(EXIT_FAILURE);
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}
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/*
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* For portability clear the whole structure, since some
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* implementations have additional (nonstandard) fields in
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* the structure.
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*/
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memset(&addr, 0, sizeof(struct sockaddr_un));
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/* Connect socket to socket address */
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addr.sun_family = AF_UNIX;
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strncpy(addr.sun_path, SOCKET_NAME, sizeof(addr.sun_path) - 1);
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ret = connect (data_socket, (const struct sockaddr *) &addr,
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sizeof(struct sockaddr_un));
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if (ret == -1) {
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fprintf(stderr, "The server is down.\n");
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exit(EXIT_FAILURE);
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}
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/* Send arguments. */
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for (i = 1; i < argc; ++i) {
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ret = write(data_socket, argv[i], strlen(argv[i]) + 1);
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if (ret == -1) {
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perror("write");
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break;
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}
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}
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/* Request result. */
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strcpy (buffer, "END");
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ret = write(data_socket, buffer, strlen(buffer) + 1);
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if (ret == -1) {
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perror("write");
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exit(EXIT_FAILURE);
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}
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/* Receive result. */
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ret = read(data_socket, buffer, BUFFER_SIZE);
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if (ret == -1) {
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perror("read");
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exit(EXIT_FAILURE);
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}
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/* Ensure buffer is 0-terminated. */
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buffer[BUFFER_SIZE - 1] = 0;
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printf("Result = %s\n", buffer);
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/* Close socket. */
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close(data_socket);
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exit(EXIT_SUCCESS);
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}
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