int do_exec(int nargs, char **args)
{
pid_t pid;
int status, i, j;
char *par[MAX_PARAMETERS];
char prop_val[PROP_VALUE_MAX];
int len;
if (nargs > MAX_PARAMETERS)
{
return -1;
}
for(i=0, j=1; i<(nargs-1) ;i++,j++)
{
if ((args[j])
&&
(!expand_props(prop_val, args[j], sizeof(prop_val))))
{
len = strlen(args[j]);
if (strlen(prop_val) <= len) {
/* Overwrite arg with expansion.
*
* For now, only allow an expansion length that
* can fit within the original arg length to
* avoid extra allocations.
* On failure, use original argument.
*/
strncpy(args[j], prop_val, len + 1);
}
}
par[i] = args[j];
}
par[i] = (char*)0;
pid = fork();
if (!pid)
{
char tmp[32];
int fd, sz;
get_property_workspace(&fd, &sz);
sprintf(tmp, "%d,%d", dup(fd), sz);
setenv("ANDROID_PROPERTY_WORKSPACE", tmp, 1);
execve(par[0], par, environ);
exit(0);
}
else
{
while(wait(&status)!=pid);
}
return 0;
}
int do_write(int nargs, char **args)
{
const char *path = args[1];
const char *value = args[2];
char expanded_value[256];
if (expand_props(expanded_value, value, sizeof(expanded_value))) {
ERROR("cannot expand '%s' while writing to '%s'\n", value, path);
return -EINVAL;
}
return write_file(path, expanded_value);
}
int do_write(int nargs, char **args)
{
const char *path = args[1];
const char *value = args[2];
char prop_val[PROP_VALUE_MAX];
int ret;
ret = expand_props(prop_val, value, sizeof(prop_val));
if (ret) {
ERROR("cannot expand '%s' while writing to '%s'\n", value, path);
return -EINVAL;
}
return write_file(path, prop_val);
}
int do_powerctl(int nargs, char **args)
{
char command[PROP_VALUE_MAX];
int res;
int len = 0;
int cmd = 0;
const char *reboot_target;
void (*callback_on_ro_remount)(const struct mntent*) = NULL;
res = expand_props(command, args[1], sizeof(command));
if (res) {
ERROR("powerctl: cannot expand '%s'\n", args[1]);
return -EINVAL;
}
if (strncmp(command, "shutdown", 8) == 0) {
if (property_get_bool("init.shutdown_to_charging", false)) {
return android_reboot(ANDROID_RB_RESTART2, 0, "charging");
}
cmd = ANDROID_RB_POWEROFF;
len = 8;
callback_on_ro_remount = unmount_and_fsck;
} else if (strncmp(command, "reboot", 6) == 0) {
cmd = ANDROID_RB_RESTART2;
len = 6;
} else {
ERROR("powerctl: unrecognized command '%s'\n", command);
return -EINVAL;
}
if (command[len] == ',') {
char prop_value[PROP_VALUE_MAX] = {0};
reboot_target = &command[len + 1];
if ((property_get("init.svc.recovery", prop_value) == 0) &&
(strncmp(reboot_target, "keys", 4) == 0)) {
ERROR("powerctl: permission denied\n");
return -EINVAL;
}
} else if (command[len] == '\0') {
reboot_target = "";
} else {
ERROR("powerctl: unrecognized reboot target '%s'\n", &command[len]);
return -EINVAL;
}
return android_reboot_with_callback(cmd, 0, reboot_target,
callback_on_ro_remount);
}
int do_setprop(int nargs, char **args)
{
const char *name = args[1];
const char *value = args[2];
char prop_val[PROP_VALUE_MAX];
int ret;
ret = expand_props(prop_val, value, sizeof(prop_val));
if (ret) {
ERROR("cannot expand '%s' while assigning to '%s'\n", value, name);
return -EINVAL;
}
property_set(name, prop_val);
return 0;
}
static int insmod(const char *filename, char *options)
{
char filename_val[PROP_VALUE_MAX];
if (expand_props(filename_val, filename, sizeof(filename_val)) == -1) {
ERROR("insmod: cannot expand '%s'\n", filename);
return -EINVAL;
}
std::string module;
if (!read_file(filename_val, &module)) {
return -1;
}
// TODO: use finit_module for >= 3.8 kernels.
return init_module(&module[0], module.size(), options);
}
int do_powerctl(int nargs, char **args)
{
char command[PROP_VALUE_MAX];
int res;
int len = 0;
int cmd = 0;
const char *reboot_target;
res = expand_props(command, args[1], sizeof(command));
if (res) {
ERROR("powerctl: cannot expand '%s'\n", args[1]);
return -EINVAL;
}
if (strncmp(command, "shutdown", 8) == 0) {
cmd = ANDROID_RB_POWEROFF;
len = 8;
} else if (strncmp(command, "reboot", 6) == 0) {
cmd = ANDROID_RB_RESTART2;
len = 6;
} else {
ERROR("powerctl: unrecognized command '%s'\n", command);
return -EINVAL;
}
if (command[len] == ',') {
char prop_value[PROP_VALUE_MAX] = {0};
reboot_target = &command[len + 1];
if ((property_get("init.svc.recovery", prop_value) == 0) &&
(strncmp(reboot_target, "keys", 4) == 0)) {
ERROR("powerctl: permission denied\n");
return -EINVAL;
}
} else if (command[len] == '\0') {
reboot_target = "";
} else {
ERROR("powerctl: unrecognized reboot target '%s'\n", &command[len]);
return -EINVAL;
}
return android_reboot(cmd, 0, reboot_target);
}
int do_loglevel(int nargs, char **args) {
int log_level;
char log_level_str[PROP_VALUE_MAX] = "";
if (nargs != 2) {
ERROR("loglevel: missing argument\n");
return -EINVAL;
}
if (expand_props(log_level_str, args[1], sizeof(log_level_str))) {
ERROR("loglevel: cannot expand '%s'\n", args[1]);
return -EINVAL;
}
log_level = atoi(log_level_str);
if (log_level < KLOG_ERROR_LEVEL || log_level > KLOG_DEBUG_LEVEL) {
ERROR("loglevel: invalid log level'%d'\n", log_level);
return -EINVAL;
}
klog_set_level(log_level);
return 0;
}
int do_powerctl(int nargs, char **args)
{
char command[PROP_VALUE_MAX];
int res;
int len = 0;
int cmd = 0;
char *reboot_target;
res = expand_props(command, args[1], sizeof(command));
if (res) {
ERROR("powerctl: cannot expand '%s'\n", args[1]);
return -EINVAL;
}
if (strncmp(command, "shutdown", 8) == 0) {
cmd = ANDROID_RB_POWEROFF;
len = 8;
} else if (strncmp(command, "reboot", 6) == 0) {
cmd = ANDROID_RB_RESTART2;
len = 6;
} else {
ERROR("powerctl: unrecognized command '%s'\n", command);
return -EINVAL;
}
if (command[len] == ',') {
reboot_target = &command[len + 1];
} else if (command[len] == '\0') {
reboot_target = "";
} else {
ERROR("powerctl: unrecognized reboot target '%s'\n", &command[len]);
return -EINVAL;
}
return android_reboot(cmd, 0, reboot_target);
}