devices.c revision 3f582e92f07d358f3d0941b86407b39e2e7e67cc
14f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* 24f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 34f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 44f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 54f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * you may not use this file except in compliance with the License. 64f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * You may obtain a copy of the License at 74f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 84f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 94f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * See the License for the specific language governing permissions and 144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * limitations under the License. 154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <errno.h> 184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <stdio.h> 194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <stdlib.h> 204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/stat.h> 214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/types.h> 224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <fcntl.h> 244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <dirent.h> 254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <unistd.h> 264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <string.h> 274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/socket.h> 294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/un.h> 304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <linux/netlink.h> 314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <private/android_filesystem_config.h> 324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/time.h> 334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <asm/page.h> 34982a815c10cc28707d81c46112fc45b1c10df3beColin Cross#include <sys/wait.h> 354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 363f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang#include <cutils/uevent.h> 373f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang 384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include "devices.h" 39b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross#include "util.h" 40ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "log.h" 41ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "list.h" 424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define SYSFS_PREFIX "/sys" 4402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR1 "/etc/firmware" 4502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR2 "/vendor/firmware" 464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 470dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic int device_fd = -1; 480dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross 494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct uevent { 504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *action; 514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *path; 524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *subsystem; 534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *firmware; 54b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *partition_name; 55b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int partition_num; 564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int major; 574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int minor; 584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int open_uevent_socket(void) 614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct sockaddr_nl addr; 634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int sz = 64*1024; // XXX larger? udev uses 16MB! 645f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich int on = 1; 654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int s; 664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project memset(&addr, 0, sizeof(addr)); 684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_family = AF_NETLINK; 694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_pid = getpid(); 704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_groups = 0xffffffff; 714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT); 734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(s < 0) 744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project setsockopt(s, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz)); 775f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich setsockopt(s, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)); 784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(s); 814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return s; 854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perms_ { 884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *name; 89bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char *attr; 904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int uid; 924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid; 934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned short prefix; 944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perm_node { 974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perms_ dp; 984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct listnode plist; 994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 100bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 101bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic list_declare(sys_perms); 10244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Crossstatic list_declare(dev_perms); 1034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 104bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandint add_dev_perms(const char *name, const char *attr, 105bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland mode_t perm, unsigned int uid, unsigned int gid, 106bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland unsigned short prefix) { 107bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perm_node *node = calloc(1, sizeof(*node)); 1084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!node) 1094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 111bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.name = strdup(name); 112bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.name) 1134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 115bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) { 116bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.attr = strdup(attr); 117bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.attr) 118bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return -ENOMEM; 119bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland } 120bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.perm = perm; 1224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.uid = uid; 1234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.gid = gid; 1244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.prefix = prefix; 1254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 126bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) 127bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&sys_perms, &node->plist); 128bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland else 129bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&dev_perms, &node->plist); 130bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 1324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 134bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandvoid fixup_sys_perms(const char *upath) 1354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 136bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char buf[512]; 137bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct listnode *node; 138bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perms_ *dp; 1394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 140bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland /* upaths omit the "/sys" that paths in this list 141bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland * contain, so we add 4 when comparing... 142bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland */ 143bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_for_each(node, &sys_perms) { 144bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland dp = &(node_to_item(node, struct perm_node, plist))->dp; 145bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (dp->prefix) { 146bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strncmp(upath, dp->name + 4, strlen(dp->name + 4))) 1474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 149bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strcmp(upath, dp->name + 4)) 1504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 152bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 153bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if ((strlen(upath) + strlen(dp->attr) + 6) > sizeof(buf)) 154bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return; 155bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 156bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland sprintf(buf,"/sys%s/%s", upath, dp->attr); 157bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland INFO("fixup %s %d %d 0%o\n", buf, dp->uid, dp->gid, dp->perm); 158bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chown(buf, dp->uid, dp->gid); 159bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chmod(buf, dp->perm); 1604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid) 1644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 16644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct listnode *node; 16744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perm_node *perm_node; 16844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perms_ *dp; 16944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 17044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* search the perms list in reverse so that ueventd.$hardware can 17144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross * override ueventd.rc 17244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross */ 17344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross list_for_each_reverse(node, &dev_perms) { 17444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross perm_node = node_to_item(node, struct perm_node, plist); 17544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross dp = &perm_node->dp; 17644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 17744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (dp->prefix) { 17844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strncmp(path, dp->name, strlen(dp->name))) 17944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 18044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross } else { 18144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strcmp(path, dp->name)) 18244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 1834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 18444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = dp->uid; 18544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = dp->gid; 18644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return dp->perm; 1874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 18844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* Default if nothing found. */ 18944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = 0; 19044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = 0; 19144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return 0600; 1924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 194bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic void make_device(const char *path, 195bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland const char *upath, 196bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland int block, int major, int minor) 1974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned uid; 1994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned gid; 2004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t mode; 2014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev_t dev; 2024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR); 20417dcc5c57dcffb919f3de65ff7a0134ffa3bd874Colin Cross dev = makedev(major, minor); 2056405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly /* Temporarily change egid to avoid race condition setting the gid of the 2066405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * device node. Unforunately changing the euid would prevent creation of 2076405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * some device nodes, so the uid has to be set with chown() and is still 2086405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * racy. Fixing the gid race at least fixed the issue with system_server 2096405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * opening dynamic input devices under the AID_INPUT gid. */ 2106405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(gid); 2114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mknod(path, mode, dev); 2126405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly chown(path, uid, -1); 2136405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(AID_ROOT); 2144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2161e070846f8908dff15086efa12fbba01ab7eae15Chuck Tuffli#if LOG_UEVENTS 2174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic inline suseconds_t get_usecs(void) 2194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct timeval tv; 2214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project gettimeofday(&tv, 0); 2224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return tv.tv_sec * (suseconds_t) 1000000 + tv.tv_usec; 2234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(x...) INFO(x) 2264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#else 2284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(fmt, args...) do { } while (0) 2304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define get_usecs() 0 2314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#endif 2334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void parse_event(const char *msg, struct uevent *uevent) 2354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = ""; 2374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = ""; 2384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = ""; 2394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = ""; 2404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = -1; 2414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = -1; 242b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = NULL; 243b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = -1; 2444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* currently ignoring SEQNUM */ 2464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg) { 2474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strncmp(msg, "ACTION=", 7)) { 2484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 7; 2494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = msg; 2504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "DEVPATH=", 8)) { 2514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 8; 2524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = msg; 2534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "SUBSYSTEM=", 10)) { 2544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 10; 2554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = msg; 2564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "FIRMWARE=", 9)) { 2574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 9; 2584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = msg; 2594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MAJOR=", 6)) { 2604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 2614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = atoi(msg); 2624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MINOR=", 6)) { 2634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 2644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = atoi(msg); 265b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTN=", 6)) { 266b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 6; 267b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = atoi(msg); 268b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTNAME=", 9)) { 269b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 9; 270b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = msg; 2714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* advance to after the next \0 */ 2744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg++) 2754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ; 2764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("event { '%s', '%s', '%s', '%s', %d, %d }\n", 2794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action, uevent->path, uevent->subsystem, 2804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware, uevent->major, uevent->minor); 2814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 283b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crossstatic char **parse_platform_block_device(struct uevent *uevent) 284b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross{ 285b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *driver; 286b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *path; 287b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *slash; 288b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int width; 289b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char buf[256]; 290b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char link_path[256]; 291b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int fd; 292b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int link_num = 0; 293b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int ret; 294b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *p; 295b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross unsigned int size; 296b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross struct stat info; 297b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 298b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char **links = malloc(sizeof(char *) * 4); 299b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!links) 300b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 301b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross memset(links, 0, sizeof(char *) * 4); 302b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 303b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross /* Drop "/devices/platform/" */ 304b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross path = uevent->path; 305b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross driver = path + 18; 306b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross slash = strchr(driver, '/'); 307b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!slash) 308b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross goto err; 309b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross width = slash - driver; 310b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (width <= 0) 311b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross goto err; 312b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 313b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross snprintf(link_path, sizeof(link_path), "/dev/block/platform/%.*s", 314b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross width, driver); 315b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 316b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_name) { 317b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross p = strdup(uevent->partition_name); 318b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross sanitize(p); 319b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0) 320b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 321b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 322b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 323b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(p); 324b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 325b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 326b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_num >= 0) { 327b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0) 328b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 329b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 330b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 331b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 332b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 333b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross slash = strrchr(path, '/'); 334b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0) 335b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 336b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 337b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 338b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 339b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return links; 340b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 341b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crosserr: 342b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 343b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 344b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross} 345b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 3464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_device_event(struct uevent *uevent) 3474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char devpath[96]; 34993ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood int devpath_ready = 0; 3504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *base, *name; 351b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char **links = NULL; 3524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int block; 353b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int i; 3544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 355bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!strcmp(uevent->action,"add")) 356bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland fixup_sys_perms(uevent->path); 357bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 358bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland /* if it's not a /dev device, nothing else to do */ 3594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if((uevent->major < 0) || (uevent->minor < 0)) 3604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 3614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* do we have a name? */ 3634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name = strrchr(uevent->path, '/'); 3644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!name) 3654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 3664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name++; 3674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* too-long names would overrun our buffer */ 3694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strlen(name) > 64) 3704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 3714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* are we block or char? where should we live? */ 37335237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project if(!strncmp(uevent->subsystem, "block", 5)) { 3744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project block = 1; 3754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/block/"; 3764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 377b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!strncmp(uevent->path, "/devices/platform/", 18)) 378b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links = parse_platform_block_device(uevent); 3794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 3804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project block = 0; 3814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* this should probably be configurable somehow */ 38293ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood if (!strncmp(uevent->subsystem, "usb", 3)) { 38393ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood if (!strcmp(uevent->subsystem, "usb")) { 38493ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood /* This imitates the file system that would be created 38593ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood * if we were using devfs instead. 38693ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood * Minors are broken up into groups of 128, starting at "001" 38793ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood */ 38893ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood int bus_id = uevent->minor / 128 + 1; 38993ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood int device_id = uevent->minor % 128 + 1; 39093ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood /* build directories */ 39193ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood mkdir("/dev/bus", 0755); 39293ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood mkdir("/dev/bus/usb", 0755); 39393ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d", bus_id); 39493ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood mkdir(devpath, 0755); 39593ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d/%03d", bus_id, device_id); 39693ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood devpath_ready = 1; 39793ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood } else { 39893ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood /* ignore other USB events */ 39993ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood return; 40093ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood } 40193ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood } else if (!strncmp(uevent->subsystem, "graphics", 8)) { 4024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/graphics/"; 4034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 40435237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if (!strncmp(uevent->subsystem, "oncrpc", 6)) { 4054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/oncrpc/"; 4064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 40735237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if (!strncmp(uevent->subsystem, "adsp", 4)) { 4084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/adsp/"; 4094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 410fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev } else if (!strncmp(uevent->subsystem, "msm_camera", 10)) { 411fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev base = "/dev/msm_camera/"; 412fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev mkdir(base, 0755); 413fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev } else if(!strncmp(uevent->subsystem, "input", 5)) { 4144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/input/"; 4154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 41635237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if(!strncmp(uevent->subsystem, "mtd", 3)) { 4174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/mtd/"; 4184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 4195bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang } else if(!strncmp(uevent->subsystem, "sound", 5)) { 4205bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang base = "/dev/snd/"; 4215bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang mkdir(base, 0755); 42235237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if(!strncmp(uevent->subsystem, "misc", 4) && 4234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project !strncmp(name, "log_", 4)) { 4244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/log/"; 4254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 4264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name += 4; 4274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else 4284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/"; 4294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 43193ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood if (!devpath_ready) 43293ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood snprintf(devpath, sizeof(devpath), "%s%s", base, name); 4334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strcmp(uevent->action, "add")) { 435bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland make_device(devpath, uevent->path, block, uevent->major, uevent->minor); 436b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 437b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 438b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross make_link(devpath, links[i]); 439b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 4404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strcmp(uevent->action, "remove")) { 443b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 444b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 445b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross remove_link(devpath, links[i]); 446b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 4474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unlink(devpath); 448b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 449b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 450b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 451b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 452b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links[i]); 453b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 4544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 4564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int load_firmware(int fw_fd, int loading_fd, int data_fd) 4584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 4594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct stat st; 4604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project long len_to_copy; 4614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int ret = 0; 4624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fstat(fw_fd, &st) < 0) 4644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 4654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy = st.st_size; 4664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "1", 1); /* start transfer */ 4684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (len_to_copy > 0) { 4704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char buf[PAGE_SIZE]; 4714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nr; 4724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr = read(fw_fd, buf, sizeof(buf)); 4744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!nr) 4754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 4764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nr < 0) { 4774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 4784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 4794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy -= nr; 4824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (nr > 0) { 4834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nw = 0; 4844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nw = write(data_fd, buf + nw, nr); 4864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nw <= 0) { 4874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 4884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto out; 4894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr -= nw; 4914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectout: 4954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!ret) 4964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "0", 1); /* successful end of transfer */ 4974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 4984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "-1", 2); /* abort transfer */ 4994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return ret; 5014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void process_firmware_event(struct uevent *uevent) 5044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 50502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland char *root, *loading, *data, *file1 = NULL, *file2 = NULL; 5064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int l, loading_fd, data_fd, fw_fd; 5074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("firmware event { '%s', '%s' }\n", 5094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path, uevent->firmware); 5104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path); 5124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 5144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&loading, "%sloading", root); 5164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto root_free_out; 5184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&data, "%sdata", root); 5204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_free_out; 5224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 52302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file1, FIRMWARE_DIR1"/%s", uevent->firmware); 52402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if (l == -1) 52502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_free_out; 52602863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland 52702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file2, FIRMWARE_DIR2"/%s", uevent->firmware); 5284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto data_free_out; 5304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project loading_fd = open(loading, O_WRONLY); 5324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(loading_fd < 0) 5334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto file_free_out; 5344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project data_fd = open(data, O_WRONLY); 5364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(data_fd < 0) 5374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_close_out; 5384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 53902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file1, O_RDONLY); 54002863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if(fw_fd < 0) { 54102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file2, O_RDONLY); 54202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if(fw_fd < 0) 54302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_close_out; 54402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland } 5454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!load_firmware(fw_fd, loading_fd, data_fd)) 54702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland log_event_print("firmware copy success { '%s', '%s' }\n", root, uevent->firmware); 5484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 54902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland log_event_print("firmware copy failure { '%s', '%s' }\n", root, uevent->firmware); 5504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fw_fd); 5524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_close_out: 5534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(data_fd); 5544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_close_out: 5554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(loading_fd); 5564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectfile_free_out: 55702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file1); 55802863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file2); 5594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_free_out: 5604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(data); 5614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_free_out: 5624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(loading); 5634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectroot_free_out: 5644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(root); 5654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_firmware_event(struct uevent *uevent) 5684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 5694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid_t pid; 570982a815c10cc28707d81c46112fc45b1c10df3beColin Cross int status; 571982a815c10cc28707d81c46112fc45b1c10df3beColin Cross int ret; 5724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->subsystem, "firmware")) 5744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 5754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->action, "add")) 5774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 5784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* we fork, to avoid making large memory allocations in init proper */ 5804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid = fork(); 5814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!pid) { 5824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project process_firmware_event(uevent); 5834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(EXIT_SUCCESS); 584982a815c10cc28707d81c46112fc45b1c10df3beColin Cross } else { 585982a815c10cc28707d81c46112fc45b1c10df3beColin Cross do { 586982a815c10cc28707d81c46112fc45b1c10df3beColin Cross ret = waitpid(pid, &status, 0); 587982a815c10cc28707d81c46112fc45b1c10df3beColin Cross } while (ret == -1 && errno == EINTR); 5884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define UEVENT_MSG_LEN 1024 5920dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid handle_device_fd() 5934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 5943f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang char msg[UEVENT_MSG_LEN+2]; 5953f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang int n; 5963f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang while ((n = uevent_checked_recv(device_fd, msg, UEVENT_MSG_LEN)) > 0) { 5975f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if(n >= UEVENT_MSG_LEN) /* overflow -- discard */ 5984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 5994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n] = '\0'; 6014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n+1] = '\0'; 6024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6035f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct uevent uevent; 6044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project parse_event(msg, &uevent); 6054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_device_event(&uevent); 6074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_firmware_event(&uevent); 6084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* Coldboot walks parts of the /sys tree and pokes the uevent files 6124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** to cause the kernel to regenerate device add events that happened 6134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** before init's device manager was started 6144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** 6154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** We drain any pending events from the netlink socket every time 6164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** we poke another uevent file to make sure we don't overrun the 6174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** socket's buffer. 6184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project*/ 6194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6200dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void do_coldboot(DIR *d) 6214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct dirent *de; 6234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int dfd, fd; 6244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dfd = dirfd(d); 6264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, "uevent", O_WRONLY); 6284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd >= 0) { 6294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(fd, "add\n", 4); 6304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 6310dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross handle_device_fd(); 6324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while((de = readdir(d))) { 6354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d2; 6364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(de->d_type != DT_DIR || de->d_name[0] == '.') 6384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 6394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); 6414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd < 0) 6424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 6434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project d2 = fdopendir(fd); 6454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d2 == 0) 6464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 6474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else { 6480dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d2); 6494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d2); 6504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6540dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void coldboot(const char *path) 6554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d = opendir(path); 6574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d) { 6580dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d); 6594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d); 6604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6630dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid device_init(void) 6644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project suseconds_t t0, t1; 666f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross struct stat info; 667f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross int fd; 6684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6690dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross device_fd = open_uevent_socket(); 6700dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross if(device_fd < 0) 6710dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return; 6724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6730dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFD, FD_CLOEXEC); 6740dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFL, O_NONBLOCK); 6754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 676f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross if (stat(coldboot_done, &info) < 0) { 677f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t0 = get_usecs(); 678f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/class"); 679f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/block"); 680f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/devices"); 681f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t1 = get_usecs(); 682f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross fd = open(coldboot_done, O_WRONLY|O_CREAT, 0000); 683f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross close(fd); 684f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); 685f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } else { 686f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("skipping coldboot, already done\n"); 687f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } 6880dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross} 6894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6900dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossint get_device_fd() 6910dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross{ 6920dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return device_fd; 6934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 694