auto import from //depot/cupcake/@135843
diff --git a/libc/bionic/stubs.c b/libc/bionic/stubs.c
new file mode 100644
index 0000000..365f21a
--- /dev/null
+++ b/libc/bionic/stubs.c
@@ -0,0 +1,380 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <grp.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <netdb.h>
+#include <mntent.h>
+#include <private/android_filesystem_config.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <ctype.h>
+
+/** Thread-specific state for the stubs functions
+ **/
+
+pthread_once_t the_once = PTHREAD_ONCE_INIT;
+pthread_key_t the_key;
+
+typedef struct {
+ struct passwd passwd;
+ struct group group;
+ char* group_members[2];
+ char app_name_buffer[32];
+ char group_name_buffer[32];
+} stubs_state_t;
+
+static void
+stubs_state_free( void* _s )
+{
+ stubs_state_t* s = _s;
+ free(s);
+}
+
+static stubs_state_t*
+stubs_state_alloc( void )
+{
+ stubs_state_t* s = calloc(1, sizeof *s);
+
+ if (s != NULL) {
+ s->group.gr_mem = s->group_members;
+ }
+ return s;
+}
+
+static void __stubs_key_init(void)
+{
+ pthread_key_create( &the_key, stubs_state_free );
+}
+
+static stubs_state_t*
+__stubs_state(void)
+{
+ stubs_state_t* s;
+
+ pthread_once(&the_once, __stubs_key_init);
+ s = pthread_getspecific(the_key);
+ if (s == NULL) {
+ s = stubs_state_alloc();
+ if (s == NULL) {
+ errno = ENOMEM; /* just in case */
+ } else {
+ if ( pthread_setspecific(the_key, s) != 0 ) {
+ stubs_state_free(s);
+ errno = ENOMEM;
+ s = NULL;
+ }
+ }
+ }
+ return s;
+}
+
+static struct passwd*
+android_iinfo_to_passwd( struct passwd *pw,
+ struct android_id_info *iinfo )
+{
+ pw->pw_name = (char*)iinfo->name;
+ pw->pw_uid = iinfo->aid;
+ pw->pw_gid = iinfo->aid;
+ pw->pw_dir = "/";
+ pw->pw_shell = "/system/bin/sh";
+ return pw;
+}
+
+static struct group*
+android_iinfo_to_group( struct group *gr,
+ struct android_id_info *iinfo )
+{
+ gr->gr_name = (char*) iinfo->name;
+ gr->gr_gid = iinfo->aid;
+ gr->gr_mem[0] = gr->gr_name;
+ gr->gr_mem[1] = NULL;
+ return gr;
+}
+
+static struct passwd *
+android_id_to_passwd( struct passwd *pw, unsigned id)
+{
+ struct android_id_info *iinfo = android_ids;
+ unsigned n;
+ for (n = 0; n < android_id_count; n++) {
+ if (iinfo[n].aid == id) {
+ return android_iinfo_to_passwd(pw, iinfo + n);
+ }
+ }
+ return NULL;
+}
+
+static struct passwd*
+android_name_to_passwd(struct passwd *pw, const char *name)
+{
+ struct android_id_info *iinfo = android_ids;
+ unsigned n;
+ for (n = 0; n < android_id_count; n++) {
+ if (!strcmp(iinfo[n].name, name)) {
+ return android_iinfo_to_passwd(pw, iinfo + n);
+ }
+ }
+ return NULL;
+}
+
+static struct group*
+android_id_to_group( struct group *gr, unsigned id )
+{
+ struct android_id_info *iinfo = android_ids;
+ unsigned n;
+ for (n = 0; n < android_id_count; n++) {
+ if (iinfo[n].aid == id) {
+ return android_iinfo_to_group(gr, iinfo + n);
+ }
+ }
+ return NULL;
+}
+
+static struct group*
+android_name_to_group( struct group *gr, const char *name )
+{
+ struct android_id_info *iinfo = android_ids;
+ unsigned n;
+ for (n = 0; n < android_id_count; n++) {
+ if (!strcmp(iinfo[n].name, name)) {
+ return android_iinfo_to_group(gr, iinfo + n);
+ }
+ }
+ return NULL;
+}
+
+/* translate a user/group name like app_1234 into the
+ * corresponding user/group id (AID_APP + 1234)
+ * returns 0 and sets errno to ENOENT in case of error
+ */
+static unsigned
+app_id_from_name( const char* name )
+{
+ unsigned long id;
+ char* end;
+
+ if (memcmp(name, "app_", 4) != 0 || !isdigit(name[4]))
+ goto FAIL;
+
+ id = strtoul(name+4, &end, 10);
+ if (id == 0 || *end != '\0')
+ goto FAIL;
+
+ id += AID_APP;
+
+ /* check for overflow and that the value can be
+ * stored in our 32-bit uid_t/gid_t */
+ if (id < AID_APP || (unsigned)id != id)
+ goto FAIL;
+
+ return (unsigned)id;
+
+FAIL:
+ errno = ENOENT;
+ return 0;
+}
+
+/* translate a uid into the corresponding app_<uid>
+ * passwd structure (sets errno to ENOENT on failure)
+ */
+static struct passwd*
+app_id_to_passwd(uid_t uid, stubs_state_t* state)
+{
+ struct passwd* pw = &state->passwd;
+
+ if (uid < AID_APP) {
+ errno = ENOENT;
+ return NULL;
+ }
+
+ snprintf( state->app_name_buffer, sizeof state->app_name_buffer,
+ "app_%u", uid - AID_APP );
+
+ pw->pw_name = state->app_name_buffer;
+ pw->pw_dir = "/data";
+ pw->pw_shell = "/system/bin/sh";
+ pw->pw_uid = uid;
+ pw->pw_gid = uid;
+
+ return pw;
+}
+
+/* translate a gid into the corresponding app_<gid>
+ * group structure (sets errno to ENOENT on failure)
+ */
+static struct group*
+app_id_to_group(gid_t gid, stubs_state_t* state)
+{
+ struct group* gr = &state->group;
+
+ if (gid < AID_APP) {
+ errno = ENOENT;
+ return NULL;
+ }
+
+ snprintf(state->group_name_buffer, sizeof state->group_name_buffer,
+ "app_%u", gid - AID_APP);
+
+ gr->gr_name = state->group_name_buffer;
+ gr->gr_gid = gid;
+ gr->gr_mem[0] = gr->gr_name;
+ gr->gr_mem[1] = NULL;
+
+ return gr;
+}
+
+
+struct passwd*
+getpwuid(uid_t uid)
+{
+ stubs_state_t* state = __stubs_state();
+ struct passwd* pw;
+
+ if (state == NULL)
+ return NULL;
+
+ pw = &state->passwd;
+
+ if ( android_id_to_passwd(pw, uid) != NULL )
+ return pw;
+
+ return app_id_to_passwd(uid, state);
+}
+
+struct passwd*
+getpwnam(const char *login)
+{
+ stubs_state_t* state = __stubs_state();
+
+ if (state == NULL)
+ return NULL;
+
+ if (android_name_to_passwd(&state->passwd, login) != NULL)
+ return &state->passwd;
+
+ return app_id_to_passwd( app_id_from_name(login), state );
+}
+
+int
+getgrouplist (const char *user, gid_t group,
+ gid_t *groups, int *ngroups)
+{
+ if (*ngroups < 1) {
+ *ngroups = 1;
+ return -1;
+ }
+ groups[0] = group;
+ return (*ngroups = 1);
+}
+
+char*
+getlogin(void)
+{
+ struct passwd *pw = getpwuid(getuid());
+
+ if(pw) {
+ return pw->pw_name;
+ } else {
+ return NULL;
+ }
+}
+
+struct group*
+getgrgid(gid_t gid)
+{
+ stubs_state_t* state = __stubs_state();
+ struct group* gr;
+
+ if (state == NULL)
+ return NULL;
+
+ gr = android_id_to_group(&state->group, gid);
+ if (gr != NULL)
+ return gr;
+
+ return app_id_to_group(gid, state);
+}
+
+struct group*
+getgrnam(const char *name)
+{
+ stubs_state_t* state = __stubs_state();
+ unsigned id;
+
+ if (state == NULL)
+ return NULL;
+
+ if (android_name_to_group(&state->group, name) != 0)
+ return &state->group;
+
+ return app_id_to_group( app_id_from_name(name), state );
+}
+
+
+struct netent* getnetbyname(const char *name)
+{
+ fprintf(stderr, "FIX ME! implement getgrnam() %s:%d\n", __FILE__, __LINE__);
+ return NULL;
+}
+
+void endpwent(void)
+{
+}
+
+struct mntent* getmntent(FILE* f)
+{
+ fprintf(stderr, "FIX ME! implement getmntent() %s:%d\n", __FILE__, __LINE__);
+ return NULL;
+}
+
+char* ttyname(int fd)
+{
+ fprintf(stderr, "FIX ME! implement ttyname() %s:%d\n", __FILE__, __LINE__);
+ return NULL;
+}
+
+struct netent *getnetbyaddr(uint32_t net, int type)
+{
+ fprintf(stderr, "FIX ME! implement %s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__);
+ return NULL;
+}
+
+struct protoent *getprotobyname(const char *name)
+{
+ fprintf(stderr, "FIX ME! implement %s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__);
+ return NULL;
+}
+
+struct protoent *getprotobynumber(int proto)
+{
+ fprintf(stderr, "FIX ME! implement %s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__);
+ return NULL;
+}