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platform_system_core
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platform_system_core/adb/services.c

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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "sysdeps.h"
#define TRACE_TAG TRACE_SERVICES
#include "adb.h"
#include "file_sync_service.h"
#if ADB_HOST
# ifndef HAVE_WINSOCK
# include <netinet/in.h>
# include <netdb.h>
# include <sys/ioctl.h>
# endif
#else
# include <cutils/android_reboot.h>
#endif
typedef struct stinfo stinfo;
struct stinfo {
void (*func)(int fd, void *cookie);
int fd;
void *cookie;
};
void *service_bootstrap_func(void *x)
{
stinfo *sti = x;
sti->func(sti->fd, sti->cookie);
free(sti);
return 0;
}
#if ADB_HOST
ADB_MUTEX_DEFINE( dns_lock );
static void dns_service(int fd, void *cookie)
{
char *hostname = cookie;
struct hostent *hp;
unsigned zero = 0;
adb_mutex_lock(&dns_lock);
hp = gethostbyname(hostname);
free(cookie);
if(hp == 0) {
writex(fd, &zero, 4);
} else {
writex(fd, hp->h_addr, 4);
}
adb_mutex_unlock(&dns_lock);
adb_close(fd);
}
#else
extern int recovery_mode;
static void recover_service(int s, void *cookie)
{
unsigned char buf[4096];
unsigned count = (unsigned) cookie;
int fd;
fd = adb_creat("/tmp/update", 0644);
if(fd < 0) {
adb_close(s);
return;
}
while(count > 0) {
unsigned xfer = (count > 4096) ? 4096 : count;
if(readx(s, buf, xfer)) break;
if(writex(fd, buf, xfer)) break;
count -= xfer;
}
if(count == 0) {
writex(s, "OKAY", 4);
} else {
writex(s, "FAIL", 4);
}
adb_close(fd);
adb_close(s);
fd = adb_creat("/tmp/update.begin", 0644);
adb_close(fd);
}
void restart_root_service(int fd, void *cookie)
{
char buf[100];
char value[PROPERTY_VALUE_MAX];
if (getuid() == 0) {
snprintf(buf, sizeof(buf), "adbd is already running as root\n");
writex(fd, buf, strlen(buf));
adb_close(fd);
} else {
property_get("ro.debuggable", value, "");
if (strcmp(value, "1") != 0) {
snprintf(buf, sizeof(buf), "adbd cannot run as root in production builds\n");
writex(fd, buf, strlen(buf));
adb_close(fd);
return;
}
property_set("service.adb.root", "1");
snprintf(buf, sizeof(buf), "restarting adbd as root\n");
writex(fd, buf, strlen(buf));
adb_close(fd);
}
}
void restart_tcp_service(int fd, void *cookie)
{
char buf[100];
char value[PROPERTY_VALUE_MAX];
int port = (int)cookie;
if (port <= 0) {
snprintf(buf, sizeof(buf), "invalid port\n");
writex(fd, buf, strlen(buf));
adb_close(fd);
return;
}
snprintf(value, sizeof(value), "%d", port);
property_set("service.adb.tcp.port", value);
snprintf(buf, sizeof(buf), "restarting in TCP mode port: %d\n", port);
writex(fd, buf, strlen(buf));
adb_close(fd);
}
void restart_usb_service(int fd, void *cookie)
{
char buf[100];
property_set("service.adb.tcp.port", "0");
snprintf(buf, sizeof(buf), "restarting in USB mode\n");
writex(fd, buf, strlen(buf));
adb_close(fd);
}
void reboot_service(int fd, void *arg)
{
char buf[100];
int pid, ret;
sync();
/* Attempt to unmount the SD card first.
* No need to bother checking for errors.
*/
pid = fork();
if (pid == 0) {
/* ask vdc to unmount it */
execl("/system/bin/vdc", "/system/bin/vdc", "volume", "unmount",
getenv("EXTERNAL_STORAGE"), "force", NULL);
} else if (pid > 0) {
/* wait until vdc succeeds or fails */
waitpid(pid, &ret, 0);
}
ret = android_reboot(ANDROID_RB_RESTART2, 0, (char *) arg);
if (ret < 0) {
snprintf(buf, sizeof(buf), "reboot failed: %s\n", strerror(errno));
writex(fd, buf, strlen(buf));
}
free(arg);
adb_close(fd);
}
#endif
#if 0
static void echo_service(int fd, void *cookie)
{
char buf[4096];
int r;
char *p;
int c;
for(;;) {
r = read(fd, buf, 4096);
if(r == 0) goto done;
if(r < 0) {
if(errno == EINTR) continue;
else goto done;
}
c = r;
p = buf;
while(c > 0) {
r = write(fd, p, c);
if(r > 0) {
c -= r;
p += r;
continue;
}
if((r < 0) && (errno == EINTR)) continue;
goto done;
}
}
done:
close(fd);
}
#endif
static int create_service_thread(void (*func)(int, void *), void *cookie)
{
stinfo *sti;
adb_thread_t t;
int s[2];
if(adb_socketpair(s)) {
printf("cannot create service socket pair\n");
return -1;
}
sti = malloc(sizeof(stinfo));
if(sti == 0) fatal("cannot allocate stinfo");
sti->func = func;
sti->cookie = cookie;
sti->fd = s[1];
if(adb_thread_create( &t, service_bootstrap_func, sti)){
free(sti);
adb_close(s[0]);
adb_close(s[1]);
printf("cannot create service thread\n");
return -1;
}
D("service thread started, %d:%d\n",s[0], s[1]);
return s[0];
}
#if !ADB_HOST
static int create_subprocess(const char *cmd, const char *arg0, const char *arg1, pid_t *pid)
{
#ifdef HAVE_WIN32_PROC
D("create_subprocess(cmd=%s, arg0=%s, arg1=%s)\n", cmd, arg0, arg1);
fprintf(stderr, "error: create_subprocess not implemented on Win32 (%s %s %s)\n", cmd, arg0, arg1);
return -1;
#else /* !HAVE_WIN32_PROC */
char *devname;
int ptm;
ptm = unix_open("/dev/ptmx", O_RDWR); // | O_NOCTTY);
if(ptm < 0){
printf("[ cannot open /dev/ptmx - %s ]\n",strerror(errno));
return -1;
}
fcntl(ptm, F_SETFD, FD_CLOEXEC);
if(grantpt(ptm) || unlockpt(ptm) ||
((devname = (char*) ptsname(ptm)) == 0)){
printf("[ trouble with /dev/ptmx - %s ]\n", strerror(errno));
adb_close(ptm);
return -1;
}
*pid = fork();
if(*pid < 0) {
printf("- fork failed: %s -\n", strerror(errno));
adb_close(ptm);
return -1;
}
if(*pid == 0){
int pts;
setsid();
pts = unix_open(devname, O_RDWR);
if(pts < 0) {
fprintf(stderr, "child failed to open pseudo-term slave: %s\n", devname);
exit(-1);
}
dup2(pts, 0);
dup2(pts, 1);
dup2(pts, 2);
adb_close(pts);
adb_close(ptm);
// set OOM adjustment to zero
char text[64];
snprintf(text, sizeof text, "/proc/%d/oom_adj", getpid());
int fd = adb_open(text, O_WRONLY);
if (fd >= 0) {
adb_write(fd, "0", 1);
adb_close(fd);
} else {
D("adb: unable to open %s\n", text);
}
execl(cmd, cmd, arg0, arg1, NULL);
fprintf(stderr, "- exec '%s' failed: %s (%d) -\n",
cmd, strerror(errno), errno);
exit(-1);
} else {
// Don't set child's OOM adjustment to zero.
// Let the child do it itself, as sometimes the parent starts
// running before the child has a /proc/pid/oom_adj.
// """adb: unable to open /proc/644/oom_adj""" seen in some logs.
return ptm;
}
#endif /* !HAVE_WIN32_PROC */
}
#endif /* !ABD_HOST */
#if ADB_HOST
#define SHELL_COMMAND "/bin/sh"
#else
#define SHELL_COMMAND "/system/bin/sh"
#endif
#if !ADB_HOST
static void subproc_waiter_service(int fd, void *cookie)
{
pid_t pid = (pid_t)cookie;
D("entered. fd=%d of pid=%d\n", fd, pid);
for (;;) {
int status;
pid_t p = waitpid(pid, &status, 0);
if (p == pid) {
D("fd=%d, post waitpid(pid=%d) status=%04x\n", fd, p, status);
if (WIFSIGNALED(status)) {
D("*** Killed by signal %d\n", WTERMSIG(status));
break;
} else if (!WIFEXITED(status)) {
D("*** Didn't exit!!. status %d\n", status);
break;
} else if (WEXITSTATUS(status) >= 0) {
D("*** Exit code %d\n", WEXITSTATUS(status));
break;
}
}
}
D("shell exited fd=%d of pid=%d err=%d\n", fd, pid, errno);
if (SHELL_EXIT_NOTIFY_FD >=0) {
int res;
res = writex(SHELL_EXIT_NOTIFY_FD, &fd, sizeof(fd));
D("notified shell exit via fd=%d for pid=%d res=%d errno=%d\n",
SHELL_EXIT_NOTIFY_FD, pid, res, errno);
}
}
static int create_subproc_thread(const char *name)
{
stinfo *sti;
adb_thread_t t;
int ret_fd;
pid_t pid;
if(name) {
ret_fd = create_subprocess(SHELL_COMMAND, "-c", name, &pid);
} else {
ret_fd = create_subprocess(SHELL_COMMAND, "-", 0, &pid);
}
D("create_subprocess() ret_fd=%d pid=%d\n", ret_fd, pid);
sti = malloc(sizeof(stinfo));
if(sti == 0) fatal("cannot allocate stinfo");
sti->func = subproc_waiter_service;
sti->cookie = (void*)pid;
sti->fd = ret_fd;
if(adb_thread_create( &t, service_bootstrap_func, sti)){
free(sti);
adb_close(ret_fd);
printf("cannot create service thread\n");
return -1;
}
D("service thread started, fd=%d pid=%d\n",ret_fd, pid);
return ret_fd;
}
#endif
int service_to_fd(const char *name)
{
int ret = -1;
if(!strncmp(name, "tcp:", 4)) {
int port = atoi(name + 4);
name = strchr(name + 4, ':');
if(name == 0) {
ret = socket_loopback_client(port, SOCK_STREAM);
if (ret >= 0)
disable_tcp_nagle(ret);
} else {
#if ADB_HOST
adb_mutex_lock(&dns_lock);
ret = socket_network_client(name + 1, port, SOCK_STREAM);
adb_mutex_unlock(&dns_lock);
#else
return -1;
#endif
}
#ifndef HAVE_WINSOCK /* winsock doesn't implement unix domain sockets */
} else if(!strncmp(name, "local:", 6)) {
ret = socket_local_client(name + 6,
ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM);
} else if(!strncmp(name, "localreserved:", 14)) {
ret = socket_local_client(name + 14,
ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM);
} else if(!strncmp(name, "localabstract:", 14)) {
ret = socket_local_client(name + 14,
ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
} else if(!strncmp(name, "localfilesystem:", 16)) {
ret = socket_local_client(name + 16,
ANDROID_SOCKET_NAMESPACE_FILESYSTEM, SOCK_STREAM);
#endif
#if ADB_HOST
} else if(!strncmp("dns:", name, 4)){
char *n = strdup(name + 4);
if(n == 0) return -1;
ret = create_service_thread(dns_service, n);
#else /* !ADB_HOST */
} else if(!strncmp("dev:", name, 4)) {
ret = unix_open(name + 4, O_RDWR);
} else if(!strncmp(name, "framebuffer:", 12)) {
ret = create_service_thread(framebuffer_service, 0);
} else if(recovery_mode && !strncmp(name, "recover:", 8)) {
ret = create_service_thread(recover_service, (void*) atoi(name + 8));
} else if (!strncmp(name, "jdwp:", 5)) {
ret = create_jdwp_connection_fd(atoi(name+5));
} else if (!strncmp(name, "log:", 4)) {
ret = create_service_thread(log_service, get_log_file_path(name + 4));
} else if(!HOST && !strncmp(name, "shell:", 6)) {
if(name[6]) {
ret = create_subproc_thread(name + 6);
} else {
ret = create_subproc_thread(0);
}
} else if(!strncmp(name, "sync:", 5)) {
ret = create_service_thread(file_sync_service, NULL);
} else if(!strncmp(name, "remount:", 8)) {
ret = create_service_thread(remount_service, NULL);
} else if(!strncmp(name, "reboot:", 7)) {
void* arg = strdup(name + 7);
if(arg == 0) return -1;
ret = create_service_thread(reboot_service, arg);
} else if(!strncmp(name, "root:", 5)) {
ret = create_service_thread(restart_root_service, NULL);
} else if(!strncmp(name, "backup:", 7)) {
char* arg = strdup(name+7);
if (arg == NULL) return -1;
ret = backup_service(BACKUP, arg);
} else if(!strncmp(name, "restore:", 8)) {
ret = backup_service(RESTORE, NULL);
} else if(!strncmp(name, "tcpip:", 6)) {
int port;
if (sscanf(name + 6, "%d", &port) == 0) {
port = 0;
}
ret = create_service_thread(restart_tcp_service, (void *)port);
} else if(!strncmp(name, "usb:", 4)) {
ret = create_service_thread(restart_usb_service, NULL);
#endif
#if 0
} else if(!strncmp(name, "echo:", 5)){
ret = create_service_thread(echo_service, 0);
#endif
}
if (ret >= 0) {
close_on_exec(ret);
}
return ret;
}
#if ADB_HOST
struct state_info {
transport_type transport;
char* serial;
int state;
};
static void wait_for_state(int fd, void* cookie)
{
struct state_info* sinfo = cookie;
char* err = "unknown error";
D("wait_for_state %d\n", sinfo->state);
atransport *t = acquire_one_transport(sinfo->state, sinfo->transport, sinfo->serial, &err);
if(t != 0) {
writex(fd, "OKAY", 4);
} else {
sendfailmsg(fd, err);
}
if (sinfo->serial)
free(sinfo->serial);
free(sinfo);
adb_close(fd);
D("wait_for_state is done\n");
}
#endif
#if ADB_HOST
asocket* host_service_to_socket(const char* name, const char *serial)
{
if (!strcmp(name,"track-devices")) {
return create_device_tracker();
} else if (!strncmp(name, "wait-for-", strlen("wait-for-"))) {
struct state_info* sinfo = malloc(sizeof(struct state_info));
if (serial)
sinfo->serial = strdup(serial);
else
sinfo->serial = NULL;
name += strlen("wait-for-");
if (!strncmp(name, "local", strlen("local"))) {
sinfo->transport = kTransportLocal;
sinfo->state = CS_DEVICE;
} else if (!strncmp(name, "usb", strlen("usb"))) {
sinfo->transport = kTransportUsb;
sinfo->state = CS_DEVICE;
} else if (!strncmp(name, "any", strlen("any"))) {
sinfo->transport = kTransportAny;
sinfo->state = CS_DEVICE;
} else {
free(sinfo);
return NULL;
}
int fd = create_service_thread(wait_for_state, sinfo);
return create_local_socket(fd);
}
return NULL;
}
#endif /* ADB_HOST */
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