Add tested Alpine-derived distroless rTorrent variant

install/rtorrent-entrypoint.c

@@ -0,0 +1,31 @@
+#include <arpa/inet.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+int main(int argc, char **argv) {
+    if (argc == 2 && strcmp(argv[1], "--healthcheck") == 0) {
+        alarm(5);
+        int fd = socket(AF_INET, SOCK_STREAM, 0);
+        if (fd < 0) return 1;
+        struct sockaddr_in addr = {0};
+        addr.sin_family = AF_INET;
+        addr.sin_port = htons(5001);
+        addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+        int result = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
+        close(fd);
+        return result == 0 ? 0 : 1;
+    }
+    const char *lock = "/home/nfs_download/rsession/rtorrent.lock";
+    if (unlink(lock) < 0 && errno != ENOENT) {
+        perror("Cannot remove stale rtorrent lock");
+        return 1;
+    }
+    argv[0] = "/usr/bin/rtorrent";
+    execv(argv[0], argv);
+    perror("Cannot start rtorrent");
+    return 127;
+}