termux-packages/ndk-patches/pwd.h.patch

--- sysroot.orig/usr/include/pwd.h	2019-07-30 14:15:53.170288784 -0400
+++ sysroot/usr/include/pwd.h	2019-07-30 14:12:44.446936650 -0400
@@ -89,7 +89,6 @@
 struct passwd* getpwent(void) __INTRODUCED_IN(26);
 
 void setpwent(void) __INTRODUCED_IN(26);
-void endpwent(void) __INTRODUCED_IN(26);
 #endif /* __ANDROID_API__ >= 26 */
 
 
@@ -98,6 +97,50 @@
 
 int access(const char* __path, int __mode);
 
+static void android_setup_pwd(struct passwd* pw) {
+	char const* result = "@TERMUX_PREFIX@/bin/login";
+	if (result == NULL || access(result, /*X_OK*/1) == -1) {
+		pw->pw_shell = (char *) "@TERMUX_PREFIX@/bin/bash";
+	} else {
+		pw->pw_shell = (char*) result;
+	}
+	pw->pw_dir = (char *) "@TERMUX_HOME@";
+	pw->pw_passwd = (char *) "*";
+#ifdef __LP64__
+	pw->pw_gecos = (char *) ""; /* Avoid NULL field. */
+#endif
+}
+
+static struct passwd* android_polyfill_getpwuid(uid_t t) {
+       struct passwd* pw = getpwuid(t);
+       if (pw == NULL) return NULL;
+       android_setup_pwd(pw);
+       return pw;
+}
+
+static struct passwd* android_polyfill_getpwnam(const char* name) {
+       struct passwd* pw = getpwnam(name);
+       if (pw == NULL) return NULL;
+       android_setup_pwd(pw);
+       return pw;
+}
+
+static int android_polyfill_getpwuid_r(uid_t uid,
+                                       struct passwd *pwd,
+                                       char *buffer,
+                                       size_t bufsize,
+                                       struct passwd **result) {
+       int ret = getpwuid_r(uid, pwd, buffer, bufsize, result);
+       if (ret != 0) return ret;
+       android_setup_pwd(pwd);
+       return 0;
+}
+
+#define getpwnam android_polyfill_getpwnam
+#define getpwuid android_polyfill_getpwuid
+#define getpwuid_r android_polyfill_getpwuid_r
+static void endpwent(void) { /* Do nothing. */ }
+
 __END_DECLS
 
 #endif