add test for remote ssh commands

pkgs/clan-cli/tests/getpwnam-preload.c

@@ -0,0 +1,27 @@
+#define _GNU_SOURCE
+#include <string.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+typedef struct passwd *(*getpwnam_type)(const char *name);
+
+struct passwd *getpwnam(const char *name) {
+  struct passwd *pw;
+  getpwnam_type orig_getpwnam;
+  orig_getpwnam = (getpwnam_type)dlsym(RTLD_NEXT, "getpwnam");
+  pw = orig_getpwnam(name);
+
+  if (pw) {
+    const char *shell = getenv("LOGIN_SHELL");
+    if (!shell) {
+      fprintf(stderr, "no LOGIN_SHELL set\n");
+      exit(1);
+    }
+    fprintf(stderr, "SHELL:%s\n", shell);
+    pw->pw_shell = strdup(shell);
+  }
+  return pw;
+}