Move IPC client into common, refactor IPC

1 files changed, 78 insertions, 0 deletions

diff --git a/common/ipc-client.c b/common/ipc-client.c
new file mode 100644
index 00000000..916676a9
--- /dev/null
+++ b/common/ipc-client.c
@@ -0,0 +1,78 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <stdint.h>
+#include <sys/un.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include "log.h"
+#include "stringop.h"
+#include "ipc-server.h"
+#include "readline.h"
+
+static const char ipc_magic[] = {'i', '3', '-', 'i', 'p', 'c'};
+static const size_t ipc_header_size = sizeof(ipc_magic)+8;
+
+char *get_socketpath(void) {
+        FILE *fp = popen("sway --get-socketpath", "r");
+        if (!fp) {
+                return NULL;
+        }
+        char *line = read_line(fp);
+        pclose(fp);
+        return line;
+}
+
+char *ipc_single_command(const char *socket_path, uint32_t type, const char *payload, uint32_t len) {
+        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;
+        strcpy(addr.sun_path, socket_path);
+        int l = sizeof(addr.sun_family) + strlen(addr.sun_path);
+        if (connect(socketfd, (struct sockaddr *)&addr, l) == -1) {
+                sway_abort("Unable to connect to %s", socket_path);
+        }
+
+        char data[ipc_header_size];
+        uint32_t *data32 = (uint32_t *)(data + sizeof(ipc_magic));
+        memcpy(data, ipc_magic, sizeof(ipc_magic));
+        data32[0] = len;
+        data32[1] = 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");
+        }
+
+        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;
+        }
+
+        total = 0;
+        len = data32[0];
+        char *response = malloc(len + 1);
+        while (total < len) {
+                ssize_t received = recv(socketfd, response + total, len - total, 0);
+                if (received < 0) {
+                        sway_abort("Unable to receive IPC response");
+                }
+                total += received;
+        }
+        response[len] = '\0';
+
+        close(socketfd);
+
+        return response;
+}