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

diff -uNr sysroot.orig/usr/include/pwd.h sysroot/usr/include/pwd.h
--- sysroot.orig/usr/include/pwd.h	2019-02-12 16:12:24.000000000 +0000
+++ sysroot/usr/include/pwd.h	2019-03-20 13:26:24.283060011 +0000
@@ -89,13 +89,58 @@
 struct passwd* getpwent(void) __INTRODUCED_IN(26);
 
 void setpwent(void) __INTRODUCED_IN(26);
-void endpwent(void) __INTRODUCED_IN(26);
 #endif /* __ANDROID_API__ >= 26 */
 
 
 int getpwnam_r(const char* __name, struct passwd* __pwd, char* __buf, size_t __n, struct passwd** __result) __INTRODUCED_IN(12);
 int getpwuid_r(uid_t __uid, struct passwd* __pwd, char* __buf, size_t __n, struct passwd** __result) __INTRODUCED_IN(12);
 
+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 = "@TERMUX_PREFIX@/bin/bash";
+	} else {
+		pw->pw_shell = (char*) result;
+	}
+	pw->pw_dir = "@TERMUX_HOME@";
+	pw->pw_passwd = "*";
+#ifdef __LP64__
+	pw->pw_gecos = ""; /* 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