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-rw-r--r--init/builtins.c402
1 files changed, 402 insertions, 0 deletions
diff --git a/init/builtins.c b/init/builtins.c
new file mode 100644
index 0000000..ba34410
--- /dev/null
+++ b/init/builtins.c
@@ -0,0 +1,402 @@
+/*
+ * 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 "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 -1;
+
+ len = strlen(value);
+
+ do {
+ ret = write(fd, value, len);
+ } while (ret < 0 && errno == EINTR);
+
+ close(fd);
+ if (ret < 0) {
+ return -1;
+ } else {
+ return 0;
+ }
+}
+
+static int insmod(const char *filename)
+{
+ void *module;
+ unsigned size;
+ int ret;
+
+ module = read_file(filename, &size);
+ if (!module)
+ return -1;
+
+ ret = init_module(module, size, "");
+
+ 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);
+ }
+}
+
+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);
+}
+
+int do_insmod(int nargs, char **args)
+{
+ return insmod(args[1]);
+}
+
+int do_import(int nargs, char **args)
+{
+ return -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;
+ 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];
+ }
+
+ source = args[2];
+ if (!strncmp(source, "mtd@", 4)) {
+ n = mtd_name_to_number(source + 4);
+ if (n >= 0) {
+ sprintf(tmp, "/dev/block/mtdblock%d", n);
+ source = tmp;
+ }
+ }
+ return mount(source, args[3], args[1], flags, options);
+}
+
+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);
+ }
+ 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);
+ }
+ return 0;
+}
+
+int do_trigger(int nargs, char **args)
+{
+ return 0;
+}
+
+int do_symlink(int nargs, char **args)
+{
+ return symlink(args[1], args[2]);
+}
+
+int do_write(int nargs, char **args)
+{
+ return write_file(args[1], args[2]);
+}
+
+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;
+}
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