openkylin
/
platform_system_core
mirror of https://gitee.com/openkylin/platform_system_core.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
platform_system_core/init/builtins.c

575 lines
12 KiB
C
Raw Blame History

/*
* Copyright (C) 2008 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <linux/kd.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <linux/loop.h>
#include "init.h"
#include "keywords.h"
#include "property_service.h"
#include "devices.h"
#include <private/android_filesystem_config.h>
void add_environment(const char *name, const char *value);
extern int init_module(void *, unsigned long, const char *);
static int write_file(const char *path, const char *value)
{
int fd, ret, len;
fd = open(path, O_WRONLY|O_CREAT, 0622);
if (fd < 0)
return -errno;
len = strlen(value);
do {
ret = write(fd, value, len);
} while (ret < 0 && errno == EINTR);
close(fd);
if (ret < 0) {
return -errno;
} else {
return 0;
}
}
static int insmod(const char *filename, char *options)
{
void *module;
unsigned size;
int ret;
module = read_file(filename, &size);
if (!module)
return -1;
ret = init_module(module, size, options);
free(module);
return ret;
}
static int setkey(struct kbentry *kbe)
{
int fd, ret;
fd = open("/dev/tty0", O_RDWR | O_SYNC);
if (fd < 0)
return -1;
ret = ioctl(fd, KDSKBENT, kbe);
close(fd);
return ret;
}
static int __ifupdown(const char *interface, int up)
{
struct ifreq ifr;
int s, ret;
strlcpy(ifr.ifr_name, interface, IFNAMSIZ);
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
return -1;
ret = ioctl(s, SIOCGIFFLAGS, &ifr);
if (ret < 0) {
goto done;
}
if (up)
ifr.ifr_flags |= IFF_UP;
else
ifr.ifr_flags &= ~IFF_UP;
ret = ioctl(s, SIOCSIFFLAGS, &ifr);
done:
close(s);
return ret;
}
static void service_start_if_not_disabled(struct service *svc)
{
if (!(svc->flags & SVC_DISABLED)) {
service_start(svc, NULL);
}
}
int do_chdir(int nargs, char **args)
{
chdir(args[1]);
return 0;
}
int do_chroot(int nargs, char **args)
{
chroot(args[1]);
return 0;
}
int do_class_start(int nargs, char **args)
{
/* Starting a class does not start services
* which are explicitly disabled. They must
* be started individually.
*/
service_for_each_class(args[1], service_start_if_not_disabled);
return 0;
}
int do_class_stop(int nargs, char **args)
{
service_for_each_class(args[1], service_stop);
return 0;
}
int do_domainname(int nargs, char **args)
{
return write_file("/proc/sys/kernel/domainname", args[1]);
}
int do_exec(int nargs, char **args)
{
return -1;
}
int do_export(int nargs, char **args)
{
add_environment(args[1], args[2]);
return 0;
}
int do_hostname(int nargs, char **args)
{
return write_file("/proc/sys/kernel/hostname", args[1]);
}
int do_ifup(int nargs, char **args)
{
return __ifupdown(args[1], 1);
}
static int do_insmod_inner(int nargs, char **args, int opt_len)
{
char options[opt_len + 1];
int i;
options[0] = '\0';
if (nargs > 2) {
strcpy(options, args[2]);
for (i = 3; i < nargs; ++i) {
strcat(options, " ");
strcat(options, args[i]);
}
}
return insmod(args[1], options);
}
int do_insmod(int nargs, char **args)
{
int i;
int size = 0;
if (nargs > 2) {
for (i = 2; i < nargs; ++i)
size += strlen(args[i]) + 1;
}
return do_insmod_inner(nargs, args, size);
}
int do_import(int nargs, char **args)
{
return parse_config_file(args[1]);
}
int do_mkdir(int nargs, char **args)
{
mode_t mode = 0755;
/* mkdir <path> [mode] [owner] [group] */
if (nargs >= 3) {
mode = strtoul(args[2], 0, 8);
}
if (mkdir(args[1], mode)) {
return -errno;
}
if (nargs >= 4) {
uid_t uid = decode_uid(args[3]);
gid_t gid = -1;
if (nargs == 5) {
gid = decode_uid(args[4]);
}
if (chown(args[1], uid, gid)) {
return -errno;
}
}
return 0;
}
static struct {
const char *name;
unsigned flag;
} mount_flags[] = {
{ "noatime", MS_NOATIME },
{ "nosuid", MS_NOSUID },
{ "nodev", MS_NODEV },
{ "nodiratime", MS_NODIRATIME },
{ "ro", MS_RDONLY },
{ "rw", 0 },
{ "remount", MS_REMOUNT },
{ "defaults", 0 },
{ 0, 0 },
};
/* mount <type> <device> <path> <flags ...> <options> */
int do_mount(int nargs, char **args)
{
char tmp[64];
char *source, *target, *system;
char *options = NULL;
unsigned flags = 0;
int n, i;
for (n = 4; n < nargs; n++) {
for (i = 0; mount_flags[i].name; i++) {
if (!strcmp(args[n], mount_flags[i].name)) {
flags |= mount_flags[i].flag;
break;
}
}
/* if our last argument isn't a flag, wolf it up as an option string */
if (n + 1 == nargs && !mount_flags[i].name)
options = args[n];
}
system = args[1];
source = args[2];
target = args[3];
if (!strncmp(source, "mtd@", 4)) {
n = mtd_name_to_number(source + 4);
if (n < 0) {
return -1;
}
sprintf(tmp, "/dev/block/mtdblock%d", n);
if (mount(tmp, target, system, flags, options) < 0) {
return -1;
}
return 0;
} else if (!strncmp(source, "loop@", 5)) {
int mode, loop, fd;
struct loop_info info;
mode = (flags & MS_RDONLY) ? O_RDONLY : O_RDWR;
fd = open(source + 5, mode);
if (fd < 0) {
return -1;
}
for (n = 0; ; n++) {
sprintf(tmp, "/dev/block/loop%d", n);
loop = open(tmp, mode);
if (loop < 0) {
return -1;
}
/* if it is a blank loop device */
if (ioctl(loop, LOOP_GET_STATUS, &info) < 0 && errno == ENXIO) {
/* if it becomes our loop device */
if (ioctl(loop, LOOP_SET_FD, fd) >= 0) {
close(fd);
if (mount(tmp, target, system, flags, options) < 0) {
ioctl(loop, LOOP_CLR_FD, 0);
close(loop);
return -1;
}
close(loop);
return 0;
}
}
close(loop);
}
close(fd);
ERROR("out of loopback devices");
return -1;
} else {
if (mount(source, target, system, flags, options) < 0) {
return -1;
}
return 0;
}
}
int do_setkey(int nargs, char **args)
{
struct kbentry kbe;
kbe.kb_table = strtoul(args[1], 0, 0);
kbe.kb_index = strtoul(args[2], 0, 0);
kbe.kb_value = strtoul(args[3], 0, 0);
return setkey(&kbe);
}
int do_setprop(int nargs, char **args)
{
property_set(args[1], args[2]);
return 0;
}
int do_setrlimit(int nargs, char **args)
{
struct rlimit limit;
int resource;
resource = atoi(args[1]);
limit.rlim_cur = atoi(args[2]);
limit.rlim_max = atoi(args[3]);
return setrlimit(resource, &limit);
}
int do_start(int nargs, char **args)
{
struct service *svc;
svc = service_find_by_name(args[1]);
if (svc) {
service_start(svc, NULL);
}
return 0;
}
int do_stop(int nargs, char **args)
{
struct service *svc;
svc = service_find_by_name(args[1]);
if (svc) {
service_stop(svc);
}
return 0;
}
int do_restart(int nargs, char **args)
{
struct service *svc;
svc = service_find_by_name(args[1]);
if (svc) {
service_stop(svc);
service_start(svc, NULL);
}
return 0;
}
int do_trigger(int nargs, char **args)
{
action_for_each_trigger(args[1], action_add_queue_tail);
drain_action_queue();
return 0;
}
int do_symlink(int nargs, char **args)
{
return symlink(args[1], args[2]);
}
int do_sysclktz(int nargs, char **args)
{
struct timezone tz;
if (nargs != 2)
return -1;
memset(&tz, 0, sizeof(tz));
tz.tz_minuteswest = atoi(args[1]);
if (settimeofday(NULL, &tz))
return -1;
return 0;
}
int do_write(int nargs, char **args)
{
return write_file(args[1], args[2]);
}
int do_copy(int nargs, char **args)
{
char *buffer = NULL;
int rc = 0;
int fd1 = -1, fd2 = -1;
struct stat info;
int brtw, brtr;
char *p;
if (nargs != 3)
return -1;
if (stat(args[1], &info) < 0)
return -1;
if ((fd1 = open(args[1], O_RDONLY)) < 0)
goto out_err;
if ((fd2 = open(args[2], O_WRONLY|O_CREAT, 0660)) < 0)
goto out_err;
if (!(buffer = malloc(info.st_size)))
goto out_err;
p = buffer;
brtr = info.st_size;
while(brtr) {
rc = read(fd1, p, brtr);
if (rc < 0)
goto out_err;
if (rc == 0)
break;
p += rc;
brtr -= rc;
}
p = buffer;
brtw = info.st_size;
while(brtw) {
rc = write(fd2, p, brtw);
if (rc < 0)
goto out_err;
if (rc == 0)
break;
p += rc;
brtw -= rc;
}
rc = 0;
goto out;
out_err:
rc = -1;
out:
if (buffer)
free(buffer);
if (fd1 >= 0)
close(fd1);
if (fd2 >= 0)
close(fd2);
return rc;
}
int do_chown(int nargs, char **args) {
/* GID is optional. */
if (nargs == 3) {
if (chown(args[2], decode_uid(args[1]), -1) < 0)
return -errno;
} else if (nargs == 4) {
if (chown(args[3], decode_uid(args[1]), decode_uid(args[2])))
return -errno;
} else {
return -1;
}
return 0;
}
static mode_t get_mode(const char *s) {
mode_t mode = 0;
while (*s) {
if (*s >= '0' && *s <= '7') {
mode = (mode<<3) | (*s-'0');
} else {
return -1;
}
s++;
}
return mode;
}
int do_chmod(int nargs, char **args) {
mode_t mode = get_mode(args[1]);
if (chmod(args[2], mode) < 0) {
return -errno;
}
return 0;
}
int do_loglevel(int nargs, char **args) {
if (nargs == 2) {
log_set_level(atoi(args[1]));
return 0;
}
return -1;
}
int do_device(int nargs, char **args) {
int len;
char tmp[64];
char *source = args[1];
int prefix = 0;
if (nargs != 5)
return -1;
/* Check for wildcard '*' at the end which indicates a prefix. */
len = strlen(args[1]) - 1;
if (args[1][len] == '*') {
args[1][len] = '\0';
prefix = 1;
}
/* If path starts with mtd@ lookup the mount number. */
if (!strncmp(source, "mtd@", 4)) {
int n = mtd_name_to_number(source + 4);
if (n >= 0) {
snprintf(tmp, sizeof(tmp), "/dev/mtd/mtd%d", n);
source = tmp;
}
}
add_devperms_partners(source, get_mode(args[2]), decode_uid(args[3]),
decode_uid(args[4]), prefix);
return 0;
}
Reference in New Issue View Git Blame Copy Permalink