1 files changed, 73 insertions, 0 deletions
diff --git a/home/.bin/pbd.c b/home/.bin/pbd.c
new file mode 100755
index 00000000..e7b61d12
--- /dev/null
+++ b/home/.bin/pbd.c
@@ -0,0 +1,73 @@
+#if 0
+exec cc -Wall -Wextra -pedantic $@ -o $(dirname $0)/pbd $0
+#endif
+
+// TCP server which pipes between macOS pbcopy and pbpaste.
+
+#include <err.h>
+#include <netinet/in.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+static void spawn(const char *cmd, int childFd, int parentFd) {
+    pid_t pid = fork();
+    if (pid < 0) err(EX_OSERR, "fork");
+
+    if (pid) {
+        int status;
+        pid_t wait = waitpid(pid, &status, 0);
+        if (wait < 0) err(EX_OSERR, "waitpid");
+
+        if (status) {
+            warnx("child %s status %d", cmd, status);
+        }
+    } else {
+        int fd = dup2(parentFd, childFd);
+        if (fd < 0) err(EX_OSERR, "dup2");
+
+        int error = execlp(cmd, cmd);
+        if (error) err(EX_OSERR, "execlp");
+    }
+}
+
+int main() {
+    int error;
+
+    int server = socket(PF_INET, SOCK_STREAM, 0);
+    if (server < 0) err(EX_OSERR, "socket");
+
+    struct sockaddr_in addr = {
+        .sin_family = AF_INET,
+        .sin_port = htons(7062),
+        .sin_addr = { .s_addr = htonl(0x7f000001) },
+    };
+
+    error = bind(server, (struct sockaddr *)&addr, sizeof(addr));
+    if (error) err(EX_OSERR, "bind");
+
+    error = listen(server, 1);
+    if (error) err(EX_OSERR, "listen");
+
+    for (;;) {
+        int client = accept(server, NULL, NULL);
+        if (client < 0) err(EX_OSERR, "accept");
+
+        spawn("pbpaste", STDOUT_FILENO, client);
+
+        uint8_t p;
+        ssize_t peek = recv(client, &p, 1, MSG_PEEK);
+        if (peek < 0) err(EX_IOERR, "recv");
+
+        if (peek) {
+            spawn("pbcopy", STDIN_FILENO, client);
+        }
+
+        error = close(client);
+        if (error) err(EX_IOERR, "close");
+    }
+}