devices.c revision 609d8828d3b8266a80606bf902d1294296962cf3
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 364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include "devices.h" 37b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross#include "util.h" 38ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "log.h" 39ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "list.h" 404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define SYSFS_PREFIX "/sys" 4202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR1 "/etc/firmware" 4302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR2 "/vendor/firmware" 444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 450dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic int device_fd = -1; 460dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross 474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct uevent { 484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *action; 494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *path; 504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *subsystem; 514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *firmware; 52b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *partition_name; 53b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int partition_num; 544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int major; 554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int minor; 564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int open_uevent_socket(void) 594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct sockaddr_nl addr; 614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int sz = 64*1024; // XXX larger? udev uses 16MB! 625f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich int on = 1; 634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int s; 644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project memset(&addr, 0, sizeof(addr)); 664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_family = AF_NETLINK; 674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_pid = getpid(); 684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_groups = 0xffffffff; 694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT); 714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(s < 0) 724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project setsockopt(s, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz)); 755f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich setsockopt(s, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)); 764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(s); 794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return s; 834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perms_ { 864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *name; 87bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char *attr; 884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int uid; 904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid; 914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned short prefix; 924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perm_node { 954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perms_ dp; 964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct listnode plist; 974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 98bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 99bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic list_declare(sys_perms); 10044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Crossstatic list_declare(dev_perms); 1014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 102bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandint add_dev_perms(const char *name, const char *attr, 103bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland mode_t perm, unsigned int uid, unsigned int gid, 104bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland unsigned short prefix) { 105bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perm_node *node = calloc(1, sizeof(*node)); 1064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!node) 1074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 109bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.name = strdup(name); 110bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.name) 1114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 113bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) { 114bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.attr = strdup(attr); 115bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.attr) 116bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return -ENOMEM; 117bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland } 118bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.perm = perm; 1204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.uid = uid; 1214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.gid = gid; 1224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.prefix = prefix; 1234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 124bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) 125bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&sys_perms, &node->plist); 126bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland else 127bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&dev_perms, &node->plist); 128bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 1304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 132bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandvoid fixup_sys_perms(const char *upath) 1334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 134bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char buf[512]; 135bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct listnode *node; 136bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perms_ *dp; 1374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 138bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland /* upaths omit the "/sys" that paths in this list 139bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland * contain, so we add 4 when comparing... 140bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland */ 141bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_for_each(node, &sys_perms) { 142bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland dp = &(node_to_item(node, struct perm_node, plist))->dp; 143bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (dp->prefix) { 144bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strncmp(upath, dp->name + 4, strlen(dp->name + 4))) 1454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 147bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strcmp(upath, dp->name + 4)) 1484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 150bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 151bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if ((strlen(upath) + strlen(dp->attr) + 6) > sizeof(buf)) 152bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return; 153bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 154bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland sprintf(buf,"/sys%s/%s", upath, dp->attr); 155bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland INFO("fixup %s %d %d 0%o\n", buf, dp->uid, dp->gid, dp->perm); 156bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chown(buf, dp->uid, dp->gid); 157bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chmod(buf, dp->perm); 1584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid) 1624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 16444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct listnode *node; 16544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perm_node *perm_node; 16644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perms_ *dp; 16744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 16844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* search the perms list in reverse so that ueventd.$hardware can 16944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross * override ueventd.rc 17044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross */ 17144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross list_for_each_reverse(node, &dev_perms) { 17244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross perm_node = node_to_item(node, struct perm_node, plist); 17344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross dp = &perm_node->dp; 17444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 17544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (dp->prefix) { 17644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strncmp(path, dp->name, strlen(dp->name))) 17744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 17844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross } else { 17944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strcmp(path, dp->name)) 18044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 1814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 18244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = dp->uid; 18344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = dp->gid; 18444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return dp->perm; 1854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 18644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* Default if nothing found. */ 18744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = 0; 18844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = 0; 18944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return 0600; 1904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 192bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic void make_device(const char *path, 193bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland const char *upath, 194bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland int block, int major, int minor) 1954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned uid; 1974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned gid; 1984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t mode; 1994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev_t dev; 2004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR); 20217dcc5c57dcffb919f3de65ff7a0134ffa3bd874Colin Cross dev = makedev(major, minor); 2036405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly /* Temporarily change egid to avoid race condition setting the gid of the 2046405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * device node. Unforunately changing the euid would prevent creation of 2056405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * some device nodes, so the uid has to be set with chown() and is still 2066405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * racy. Fixing the gid race at least fixed the issue with system_server 2076405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * opening dynamic input devices under the AID_INPUT gid. */ 2086405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(gid); 2094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mknod(path, mode, dev); 2106405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly chown(path, uid, -1); 2116405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(AID_ROOT); 2124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2141e070846f8908dff15086efa12fbba01ab7eae15Chuck Tuffli#if LOG_UEVENTS 2154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic inline suseconds_t get_usecs(void) 2174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct timeval tv; 2194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project gettimeofday(&tv, 0); 2204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return tv.tv_sec * (suseconds_t) 1000000 + tv.tv_usec; 2214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(x...) INFO(x) 2244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#else 2264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(fmt, args...) do { } while (0) 2284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define get_usecs() 0 2294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#endif 2314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void parse_event(const char *msg, struct uevent *uevent) 2334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = ""; 2354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = ""; 2364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = ""; 2374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = ""; 2384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = -1; 2394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = -1; 240b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = NULL; 241b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = -1; 2424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* currently ignoring SEQNUM */ 2444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg) { 2454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strncmp(msg, "ACTION=", 7)) { 2464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 7; 2474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = msg; 2484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "DEVPATH=", 8)) { 2494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 8; 2504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = msg; 2514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "SUBSYSTEM=", 10)) { 2524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 10; 2534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = msg; 2544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "FIRMWARE=", 9)) { 2554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 9; 2564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = msg; 2574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MAJOR=", 6)) { 2584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 2594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = atoi(msg); 2604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MINOR=", 6)) { 2614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 2624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = atoi(msg); 263b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTN=", 6)) { 264b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 6; 265b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = atoi(msg); 266b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTNAME=", 9)) { 267b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 9; 268b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = msg; 2694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* advance to after the next \0 */ 2724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg++) 2734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ; 2744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("event { '%s', '%s', '%s', '%s', %d, %d }\n", 2774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action, uevent->path, uevent->subsystem, 2784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware, uevent->major, uevent->minor); 2794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 281d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobystatic char **get_character_device_symlinks(struct uevent *uevent) 282d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby{ 283d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby const char *parent; 284d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char *slash; 285d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char **links; 286d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int link_num = 0; 287d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int width; 288d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 289d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (strncmp(uevent->path, "/devices/platform/", 18)) 290d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 291d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 292d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links = malloc(sizeof(char *) * 2); 293d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!links) 294d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 295d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby memset(links, 0, sizeof(char *) * 2); 296d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 297d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip "/devices/platform/<driver>" */ 298d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby parent = strchr(uevent->path + 18, '/'); 299d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 300d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 301d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 302d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!strncmp(parent, "/usb", 4)) { 303d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip root hub name and device. use device interface */ 304d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 305d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (*parent) 306d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 307d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 308d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 309d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby slash = strchr(++parent, '/'); 310d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!slash) 311d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 312d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby width = slash - parent; 313d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (width <= 0) 314d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 315d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 316d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (asprintf(&links[link_num], "/dev/usb/%s%.*s", uevent->subsystem, width, parent) > 0) 317d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby link_num++; 318d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else 319d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links[link_num] = NULL; 320d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby mkdir("/dev/usb", 0755); 321d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 322d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else { 323d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 324d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 325d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 326d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return links; 327d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobyerr: 328d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby free(links); 329d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 330d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby} 331d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 332b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crossstatic char **parse_platform_block_device(struct uevent *uevent) 333b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross{ 334b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *driver; 335b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *path; 336b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *slash; 337b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int width; 338b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char buf[256]; 339b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char link_path[256]; 340b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int fd; 341b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int link_num = 0; 342b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int ret; 343b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *p; 344b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross unsigned int size; 345b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross struct stat info; 346b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 347b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char **links = malloc(sizeof(char *) * 4); 348b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!links) 349b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 350b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross memset(links, 0, sizeof(char *) * 4); 351b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 352b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross /* Drop "/devices/platform/" */ 353b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross path = uevent->path; 354b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross driver = path + 18; 355b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross slash = strchr(driver, '/'); 356b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!slash) 357b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross goto err; 358b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross width = slash - driver; 359b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (width <= 0) 360b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross goto err; 361b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 362b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross snprintf(link_path, sizeof(link_path), "/dev/block/platform/%.*s", 363b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross width, driver); 364b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 365b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_name) { 366b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross p = strdup(uevent->partition_name); 367b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross sanitize(p); 368b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0) 369b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 370b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 371b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 372b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(p); 373b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 374b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 375b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_num >= 0) { 376b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0) 377b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 378b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 379b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 380b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 381b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 382b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross slash = strrchr(path, '/'); 383b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0) 384b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 385b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 386b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 387b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 388b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return links; 389b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 390b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crosserr: 391b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 392b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 393b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross} 394b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 3954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_device_event(struct uevent *uevent) 3964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char devpath[96]; 39893ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood int devpath_ready = 0; 3994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *base, *name; 400b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char **links = NULL; 4014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int block; 402b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int i; 4034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 404bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!strcmp(uevent->action,"add")) 405bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland fixup_sys_perms(uevent->path); 406bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 407bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland /* if it's not a /dev device, nothing else to do */ 4084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if((uevent->major < 0) || (uevent->minor < 0)) 4094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 4104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* do we have a name? */ 4124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name = strrchr(uevent->path, '/'); 4134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!name) 4144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 4154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name++; 4164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* too-long names would overrun our buffer */ 4184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strlen(name) > 64) 4194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 4204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* are we block or char? where should we live? */ 42235237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project if(!strncmp(uevent->subsystem, "block", 5)) { 4234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project block = 1; 4244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/block/"; 4254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 426b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!strncmp(uevent->path, "/devices/platform/", 18)) 427b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links = parse_platform_block_device(uevent); 4284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 4294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project block = 0; 4304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* this should probably be configurable somehow */ 43193ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood if (!strncmp(uevent->subsystem, "usb", 3)) { 43293ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood if (!strcmp(uevent->subsystem, "usb")) { 43393ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood /* This imitates the file system that would be created 43493ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood * if we were using devfs instead. 43593ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood * Minors are broken up into groups of 128, starting at "001" 43693ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood */ 43793ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood int bus_id = uevent->minor / 128 + 1; 43893ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood int device_id = uevent->minor % 128 + 1; 43993ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood /* build directories */ 44093ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood mkdir("/dev/bus", 0755); 44193ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood mkdir("/dev/bus/usb", 0755); 44293ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d", bus_id); 44393ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood mkdir(devpath, 0755); 44493ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d/%03d", bus_id, device_id); 44593ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood devpath_ready = 1; 44693ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood } else { 44793ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood /* ignore other USB events */ 44893ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood return; 44993ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood } 45093ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood } else if (!strncmp(uevent->subsystem, "graphics", 8)) { 4514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/graphics/"; 4524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 45335237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if (!strncmp(uevent->subsystem, "oncrpc", 6)) { 4544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/oncrpc/"; 4554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 45635237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if (!strncmp(uevent->subsystem, "adsp", 4)) { 4574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/adsp/"; 4584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 459fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev } else if (!strncmp(uevent->subsystem, "msm_camera", 10)) { 460fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev base = "/dev/msm_camera/"; 461fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev mkdir(base, 0755); 462fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev } else if(!strncmp(uevent->subsystem, "input", 5)) { 4634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/input/"; 4644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 46535237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if(!strncmp(uevent->subsystem, "mtd", 3)) { 4664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/mtd/"; 4674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 4685bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang } else if(!strncmp(uevent->subsystem, "sound", 5)) { 4695bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang base = "/dev/snd/"; 4705bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang mkdir(base, 0755); 47135237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if(!strncmp(uevent->subsystem, "misc", 4) && 4724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project !strncmp(name, "log_", 4)) { 4734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/log/"; 4744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 4754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name += 4; 4764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else 4774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/"; 478d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links = get_character_device_symlinks(uevent); 4794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 48193ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood if (!devpath_ready) 48293ac1559b8c7ad3125ddcd896082b030faadbbd4Mike Lockwood snprintf(devpath, sizeof(devpath), "%s%s", base, name); 4834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strcmp(uevent->action, "add")) { 485bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland make_device(devpath, uevent->path, block, uevent->major, uevent->minor); 486b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 487b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 488b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross make_link(devpath, links[i]); 489b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 4904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strcmp(uevent->action, "remove")) { 493b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 494b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 495b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross remove_link(devpath, links[i]); 496b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 4974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unlink(devpath); 498b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 499b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 500b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 501b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 502b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links[i]); 503b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 5044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int load_firmware(int fw_fd, int loading_fd, int data_fd) 5084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 5094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct stat st; 5104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project long len_to_copy; 5114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int ret = 0; 5124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fstat(fw_fd, &st) < 0) 5144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 5154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy = st.st_size; 5164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "1", 1); /* start transfer */ 5184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (len_to_copy > 0) { 5204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char buf[PAGE_SIZE]; 5214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nr; 5224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr = read(fw_fd, buf, sizeof(buf)); 5244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!nr) 5254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 5264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nr < 0) { 5274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 5284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 5294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy -= nr; 5324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (nr > 0) { 5334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nw = 0; 5344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nw = write(data_fd, buf + nw, nr); 5364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nw <= 0) { 5374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 5384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto out; 5394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr -= nw; 5414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectout: 5454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!ret) 5464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "0", 1); /* successful end of transfer */ 5474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 5484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "-1", 2); /* abort transfer */ 5494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return ret; 5514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void process_firmware_event(struct uevent *uevent) 5544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 55502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland char *root, *loading, *data, *file1 = NULL, *file2 = NULL; 5564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int l, loading_fd, data_fd, fw_fd; 5574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("firmware event { '%s', '%s' }\n", 5594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path, uevent->firmware); 5604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path); 5624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 5644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&loading, "%sloading", root); 5664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto root_free_out; 5684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&data, "%sdata", root); 5704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_free_out; 5724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 57302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file1, FIRMWARE_DIR1"/%s", uevent->firmware); 57402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if (l == -1) 57502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_free_out; 57602863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland 57702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file2, FIRMWARE_DIR2"/%s", uevent->firmware); 5784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto data_free_out; 5804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project loading_fd = open(loading, O_WRONLY); 5824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(loading_fd < 0) 5834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto file_free_out; 5844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project data_fd = open(data, O_WRONLY); 5864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(data_fd < 0) 5874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_close_out; 5884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 58902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file1, O_RDONLY); 59002863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if(fw_fd < 0) { 59102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file2, O_RDONLY); 592609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby if (fw_fd < 0) { 593609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby write(loading_fd, "-1", 2); 59402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_close_out; 595609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby } 59602863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland } 5974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!load_firmware(fw_fd, loading_fd, data_fd)) 59902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland log_event_print("firmware copy success { '%s', '%s' }\n", root, uevent->firmware); 6004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 60102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland log_event_print("firmware copy failure { '%s', '%s' }\n", root, uevent->firmware); 6024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fw_fd); 6044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_close_out: 6054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(data_fd); 6064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_close_out: 6074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(loading_fd); 6084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectfile_free_out: 60902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file1); 61002863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file2); 6114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_free_out: 6124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(data); 6134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_free_out: 6144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(loading); 6154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectroot_free_out: 6164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(root); 6174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_firmware_event(struct uevent *uevent) 6204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid_t pid; 622982a815c10cc28707d81c46112fc45b1c10df3beColin Cross int status; 623982a815c10cc28707d81c46112fc45b1c10df3beColin Cross int ret; 6244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->subsystem, "firmware")) 6264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 6274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->action, "add")) 6294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 6304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* we fork, to avoid making large memory allocations in init proper */ 6324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid = fork(); 6334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!pid) { 6344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project process_firmware_event(uevent); 6354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(EXIT_SUCCESS); 636982a815c10cc28707d81c46112fc45b1c10df3beColin Cross } else { 637982a815c10cc28707d81c46112fc45b1c10df3beColin Cross do { 638982a815c10cc28707d81c46112fc45b1c10df3beColin Cross ret = waitpid(pid, &status, 0); 639982a815c10cc28707d81c46112fc45b1c10df3beColin Cross } while (ret == -1 && errno == EINTR); 6404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define UEVENT_MSG_LEN 1024 6440dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid handle_device_fd() 6454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6465f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich for(;;) { 6475f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich char msg[UEVENT_MSG_LEN+2]; 6485f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich char cred_msg[CMSG_SPACE(sizeof(struct ucred))]; 6495f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct iovec iov = {msg, sizeof(msg)}; 6505f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct sockaddr_nl snl; 6515f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct msghdr hdr = {&snl, sizeof(snl), &iov, 1, cred_msg, sizeof(cred_msg), 0}; 6525f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich 653fad7204e9eac20a87afacd7547ed8202a39319f8Nick Kralevich ssize_t n = recvmsg(device_fd, &hdr, 0); 6545f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if (n <= 0) { 6555f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich break; 6565f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich } 6574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6585f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if ((snl.nl_groups != 1) || (snl.nl_pid != 0)) { 6595f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich /* ignoring non-kernel netlink multicast message */ 6605f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich continue; 6615f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich } 6625f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich 6635f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct cmsghdr * cmsg = CMSG_FIRSTHDR(&hdr); 6645f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if (cmsg == NULL || cmsg->cmsg_type != SCM_CREDENTIALS) { 6655f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich /* no sender credentials received, ignore message */ 6665f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich continue; 6675f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich } 6685f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich 6695f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct ucred * cred = (struct ucred *)CMSG_DATA(cmsg); 6705f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if (cred->uid != 0) { 6715f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich /* message from non-root user, ignore */ 6725f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich continue; 6735f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich } 6744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6755f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if(n >= UEVENT_MSG_LEN) /* overflow -- discard */ 6764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 6774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n] = '\0'; 6794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n+1] = '\0'; 6804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6815f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct uevent uevent; 6824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project parse_event(msg, &uevent); 6834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_device_event(&uevent); 6854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_firmware_event(&uevent); 6864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* Coldboot walks parts of the /sys tree and pokes the uevent files 6904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** to cause the kernel to regenerate device add events that happened 6914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** before init's device manager was started 6924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** 6934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** We drain any pending events from the netlink socket every time 6944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** we poke another uevent file to make sure we don't overrun the 6954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** socket's buffer. 6964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project*/ 6974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6980dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void do_coldboot(DIR *d) 6994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct dirent *de; 7014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int dfd, fd; 7024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dfd = dirfd(d); 7044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, "uevent", O_WRONLY); 7064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd >= 0) { 7074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(fd, "add\n", 4); 7084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 7090dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross handle_device_fd(); 7104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while((de = readdir(d))) { 7134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d2; 7144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(de->d_type != DT_DIR || de->d_name[0] == '.') 7164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 7174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); 7194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd < 0) 7204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 7214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project d2 = fdopendir(fd); 7234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d2 == 0) 7244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 7254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else { 7260dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d2); 7274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d2); 7284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7320dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void coldboot(const char *path) 7334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d = opendir(path); 7354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d) { 7360dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d); 7374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d); 7384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7410dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid device_init(void) 7424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project suseconds_t t0, t1; 744f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross struct stat info; 745f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross int fd; 7464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7470dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross device_fd = open_uevent_socket(); 7480dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross if(device_fd < 0) 7490dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return; 7504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7510dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFD, FD_CLOEXEC); 7520dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFL, O_NONBLOCK); 7534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 754f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross if (stat(coldboot_done, &info) < 0) { 755f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t0 = get_usecs(); 756f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/class"); 757f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/block"); 758f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/devices"); 759f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t1 = get_usecs(); 760f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross fd = open(coldboot_done, O_WRONLY|O_CREAT, 0000); 761f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross close(fd); 762f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); 763f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } else { 764f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("skipping coldboot, already done\n"); 765f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } 7660dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross} 7674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7680dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossint get_device_fd() 7690dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross{ 7700dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return device_fd; 7714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 772