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pubsub logger
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#include <zmq.h> | |
#include <stdio.h> | |
#include <unistd.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <ctype.h> | |
#define SOCKET_ADDR "ipc:///tmp/logger" | |
// source: http://stackoverflow.com/questions/122616/how-do-i-trim-leading-trailing-whitespace-in-a-standard-way | |
char *trim_whitespace(char *str) | |
{ | |
char *end; | |
// Trim leading space | |
while(isspace(*str)) str++; | |
if(*str == 0) // All spaces? | |
return str; | |
// Trim trailing space | |
end = str + strlen(str) - 1; | |
while(end > str && isspace(*end)) end--; | |
// Write new null terminator | |
*(end+1) = 0; | |
return str; | |
} | |
int string_empty(char *str) { | |
return strlen(str) == 0; | |
} | |
char *s_recv(void *socket) { | |
zmq_msg_t message; | |
zmq_msg_init(&message); | |
zmq_recv(socket, &message, 0); | |
int size = zmq_msg_size(&message); | |
char *string = malloc((size+1) * sizeof(char)); | |
memcpy(string, zmq_msg_data(&message), size); | |
zmq_msg_close(&message); | |
string[size] = 0; | |
return string; | |
} | |
int main(void) { | |
void *context = zmq_init(1); | |
void *socket = zmq_socket(context, ZMQ_SUB); | |
zmq_setsockopt(socket, ZMQ_SUBSCRIBE, "", 0); | |
zmq_connect(socket, SOCKET_ADDR); | |
while(1) { | |
char *r_str = s_recv(socket); | |
char *str = trim_whitespace(r_str); | |
if (!string_empty(str)) { | |
printf("%s\n", str); | |
} | |
free(r_str); | |
} | |
zmq_close(socket); | |
zmq_term(context); | |
return 0; | |
} |
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#include <zmq.h> | |
#include <stdio.h> | |
#include <unistd.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <ctype.h> | |
#define SOCKET_ADDR "ipc:///tmp/logger" | |
static int | |
s_send (void *socket, char *string) { | |
int rc; | |
zmq_msg_t message; | |
zmq_msg_init_size (&message, strlen (string)); | |
memcpy (zmq_msg_data (&message), string, strlen (string)); | |
rc = zmq_send (socket, &message, 0); | |
zmq_msg_close (&message); | |
return (rc); | |
} | |
int main(int argc, char *argv[]) { | |
void *context = zmq_init(1); | |
void *socket = zmq_socket(context, ZMQ_PUB); | |
zmq_bind(socket, SOCKET_ADDR); | |
char msg[20]; | |
strlcpy(msg, argv[1], 20); | |
while(1) { | |
s_send(socket, msg); | |
} | |
zmq_close(socket); | |
zmq_term(context); | |
return 0; | |
} |
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