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#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include "ipc-client.h"
#include "log.h"
static const char ipc_magic[] = {'i', '3', '-', 'i', 'p', 'c'};
#define IPC_HEADER_SIZE (sizeof(ipc_magic) + 8)
char *get_socketpath(void) {
const char *swaysock = getenv("SWAYSOCK");
if (swaysock) {
return strdup(swaysock);
}
char *line = NULL;
size_t line_size = 0;
FILE *fp = popen("sway --get-socketpath 2>/dev/null", "r");
if (fp) {
ssize_t nret = getline(&line, &line_size, fp);
pclose(fp);
if (nret > 0) {
// remove trailing newline, if there is one
if (line[nret - 1] == '\n') {
line[nret - 1] = '\0';
}
return line;
}
}
const char *i3sock = getenv("I3SOCK");
if (i3sock) {
free(line);
return strdup(i3sock);
}
fp = popen("i3 --get-socketpath 2>/dev/null", "r");
if (fp) {
ssize_t nret = getline(&line, &line_size, fp);
pclose(fp);
if (nret > 0) {
// remove trailing newline, if there is one
if (line[nret - 1] == '\n') {
line[nret - 1] = '\0';
}
return line;
}
}
free(line);
return NULL;
}
int ipc_open_socket(const char *socket_path) {
struct sockaddr_un addr;
int socketfd;
if ((socketfd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
sway_abort("Unable to open Unix socket");
}
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
addr.sun_path[sizeof(addr.sun_path) - 1] = 0;
int l = sizeof(struct sockaddr_un);
if (connect(socketfd, (struct sockaddr *)&addr, l) == -1) {
sway_abort("Unable to connect to %s", socket_path);
}
return socketfd;
}
bool ipc_set_recv_timeout(int socketfd, struct timeval tv) {
if (setsockopt(socketfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) == -1) {
sway_log_errno(SWAY_ERROR, "Failed to set ipc recv timeout");
return false;
}
return true;
}
struct ipc_response *ipc_recv_response(int socketfd) {
char data[IPC_HEADER_SIZE];
size_t total = 0;
while (total < IPC_HEADER_SIZE) {
ssize_t received = recv(socketfd, data + total, IPC_HEADER_SIZE - total, 0);
if (received <= 0) {
sway_abort("Unable to receive IPC response");
}
total += received;
}
struct ipc_response *response = malloc(sizeof(struct ipc_response));
if (!response) {
goto error_1;
}
memcpy(&response->size, data + sizeof(ipc_magic), sizeof(uint32_t));
memcpy(&response->type, data + sizeof(ipc_magic) + sizeof(uint32_t), sizeof(uint32_t));
char *payload = malloc(response->size + 1);
if (!payload) {
goto error_2;
}
total = 0;
while (total < response->size) {
ssize_t received = recv(socketfd, payload + total, response->size - total, 0);
if (received < 0) {
sway_abort("Unable to receive IPC response");
}
total += received;
}
payload[response->size] = '\0';
response->payload = payload;
return response;
error_2:
free(response);
error_1:
sway_log(SWAY_ERROR, "Unable to allocate memory for IPC response");
return NULL;
}
void free_ipc_response(struct ipc_response *response) {
free(response->payload);
free(response);
}
char *ipc_single_command(int socketfd, uint32_t type, const char *payload, uint32_t *len) {
char data[IPC_HEADER_SIZE];
memcpy(data, ipc_magic, sizeof(ipc_magic));
memcpy(data + sizeof(ipc_magic), len, sizeof(*len));
memcpy(data + sizeof(ipc_magic) + sizeof(*len), &type, sizeof(type));
if (write(socketfd, data, IPC_HEADER_SIZE) == -1) {
sway_abort("Unable to send IPC header");
}
if (write(socketfd, payload, *len) == -1) {
sway_abort("Unable to send IPC payload");
}
struct ipc_response *resp = ipc_recv_response(socketfd);
char *response = resp->payload;
*len = resp->size;
free(resp);
return response;
}
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