Added support for listening on unix sockets.

1 files changed, 78 insertions, 0 deletions

diff --git a/xs_unix_socket.h b/xs_unix_socket.h
new file mode 100644
index 0000000..5b64282
--- /dev/null
+++ b/xs_unix_socket.h
@@ -0,0 +1,78 @@
+/* copyright (c) 2022 - 2024 grunfink et al. / MIT license */
+
+#ifndef _XS_UNIX_SOCKET_H
+
+#define _XS_UNIX_SOCKET_H
+
+ int xs_unix_socket_server(const char *path, const char *grp);
+ int xs_unix_socket_connect(const char *path);
+
+
+#ifdef XS_IMPLEMENTATION
+
+#include <sys/stat.h>
+#include <sys/un.h>
+#include <grp.h>
+
+int xs_unix_socket_server(const char *path, const char *grp)
+/* opens a unix-type server socket */
+{
+    int rs = -1;
+
+    if ((rs = socket(AF_UNIX, SOCK_STREAM, 0)) != -1) {
+        struct sockaddr_un sun = {0};
+        mode_t mode = 0666;
+
+        sun.sun_family = AF_UNIX;
+        strncpy(sun.sun_path, path, sizeof(sun.sun_path));
+
+        unlink(path);
+
+        if (bind(rs, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
+            close(rs);
+            return -1;
+        }
+
+        listen(rs, SOMAXCONN);
+
+        if (grp != NULL) {
+            struct group *g = NULL;
+
+            /* if there is a group name, get its gid_t */
+            g = getgrnam(grp);
+
+            if (g != NULL && chown(path, -1, g->gr_gid) != -1)
+                mode = 0660;
+        }
+
+        chmod(path, mode);
+    }
+
+    return rs;
+}
+
+
+int xs_unix_socket_connect(const char *path)
+/* connects to a unix-type socket */
+{
+    int d = -1;
+
+    if ((d = socket(AF_UNIX, SOCK_STREAM, 0)) != -1) {
+        struct sockaddr_un sun = {0};
+
+        sun.sun_family = AF_UNIX;
+        strncpy(sun.sun_path, path, sizeof(sun.sun_path));
+
+        if (connect(d, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
+            close(d);
+            d = -1;
+        }
+    }
+
+    return d;
+}
+
+
+#endif /* XS_IMPLEMENTATION */
+
+#endif /* _XS_UNIX_SOCKET_H */