devices.c revision 5f5d5c8cef10f28950fa108a8bd86d55f11b7ef4
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> 344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include "init.h" 364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include "devices.h" 374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define CMDLINE_PREFIX "/dev" 394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define SYSFS_PREFIX "/sys" 404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define FIRMWARE_DIR "/etc/firmware" 414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define MAX_QEMU_PERM 6 424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct uevent { 444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *action; 454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *path; 464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *subsystem; 474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *firmware; 484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int major; 494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int minor; 504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int open_uevent_socket(void) 534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct sockaddr_nl addr; 554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int sz = 64*1024; // XXX larger? udev uses 16MB! 565f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich int on = 1; 574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int s; 584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project memset(&addr, 0, sizeof(addr)); 604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_family = AF_NETLINK; 614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_pid = getpid(); 624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project addr.nl_groups = 0xffffffff; 634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT); 654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(s < 0) 664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project setsockopt(s, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz)); 695f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich setsockopt(s, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)); 704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(s); 734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return s; 774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perms_ { 804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *name; 814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int uid; 834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid; 844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned short prefix; 854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic struct perms_ devperms[] = { 874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/null", 0666, AID_ROOT, AID_ROOT, 0 }, 884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/zero", 0666, AID_ROOT, AID_ROOT, 0 }, 894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/full", 0666, AID_ROOT, AID_ROOT, 0 }, 904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/ptmx", 0666, AID_ROOT, AID_ROOT, 0 }, 914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/tty", 0666, AID_ROOT, AID_ROOT, 0 }, 924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/random", 0666, AID_ROOT, AID_ROOT, 0 }, 934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/urandom", 0666, AID_ROOT, AID_ROOT, 0 }, 944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/ashmem", 0666, AID_ROOT, AID_ROOT, 0 }, 954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/binder", 0666, AID_ROOT, AID_ROOT, 0 }, 964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* logger should be world writable (for logging) but not readable */ 984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/log/", 0662, AID_ROOT, AID_LOG, 1 }, 994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 10046e8863d77912ad6d76ed7d258dfc554a5cdb36dDima Zavin /* the msm hw3d client device node is world writable/readable. */ 10146e8863d77912ad6d76ed7d258dfc554a5cdb36dDima Zavin { "/dev/msm_hw3dc", 0666, AID_ROOT, AID_ROOT, 0 }, 10246e8863d77912ad6d76ed7d258dfc554a5cdb36dDima Zavin 10337b210f56036cda41b0407e841fe79fb4db310fcDima Zavin /* gpu driver for adreno200 is globally accessible */ 10437b210f56036cda41b0407e841fe79fb4db310fcDima Zavin { "/dev/kgsl", 0666, AID_ROOT, AID_ROOT, 0 }, 10537b210f56036cda41b0407e841fe79fb4db310fcDima Zavin 1064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* these should not be world writable */ 1076ed11ebecd3eaffd84d79706a4a3a74d39f19715Iliyan Malchev { "/dev/diag", 0660, AID_RADIO, AID_RADIO, 0 }, 1086ed11ebecd3eaffd84d79706a4a3a74d39f19715Iliyan Malchev { "/dev/diag_arm9", 0660, AID_RADIO, AID_RADIO, 0 }, 1094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/android_adb", 0660, AID_ADB, AID_ADB, 0 }, 1104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/android_adb_enable", 0660, AID_ADB, AID_ADB, 0 }, 11135237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project { "/dev/ttyMSM0", 0600, AID_BLUETOOTH, AID_BLUETOOTH, 0 }, 11235237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project { "/dev/ttyHS0", 0600, AID_BLUETOOTH, AID_BLUETOOTH, 0 }, 113be65da47e69c427d6326603e7eccd84957cc34d2Ken Schultz { "/dev/uinput", 0660, AID_SYSTEM, AID_BLUETOOTH, 0 }, 1144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/alarm", 0664, AID_SYSTEM, AID_RADIO, 0 }, 11535237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project { "/dev/tty0", 0660, AID_ROOT, AID_SYSTEM, 0 }, 1164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/graphics/", 0660, AID_ROOT, AID_GRAPHICS, 1 }, 11746e8863d77912ad6d76ed7d258dfc554a5cdb36dDima Zavin { "/dev/msm_hw3dm", 0660, AID_SYSTEM, AID_GRAPHICS, 0 }, 1184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/input/", 0660, AID_ROOT, AID_INPUT, 1 }, 1194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/eac", 0660, AID_ROOT, AID_AUDIO, 0 }, 1204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/cam", 0660, AID_ROOT, AID_CAMERA, 0 }, 1214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/pmem", 0660, AID_SYSTEM, AID_GRAPHICS, 0 }, 1224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/pmem_adsp", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 1234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/pmem_camera", 0660, AID_SYSTEM, AID_CAMERA, 1 }, 1244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/oncrpc/", 0660, AID_ROOT, AID_SYSTEM, 1 }, 1254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/adsp/", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 126102f6d2c64bbf55e1ec47061a0bc0bcd24991127Sean McNeil { "/dev/snd/", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 1274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/mt9t013", 0660, AID_SYSTEM, AID_SYSTEM, 0 }, 128fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev { "/dev/msm_camera/", 0660, AID_SYSTEM, AID_SYSTEM, 1 }, 1294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/akm8976_daemon",0640, AID_COMPASS, AID_SYSTEM, 0 }, 1304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/akm8976_aot", 0640, AID_COMPASS, AID_SYSTEM, 0 }, 1319a52eda8c5dd9df763a63f9b71cd24847f014737Iliyan Malchev { "/dev/akm8973_daemon",0640, AID_COMPASS, AID_SYSTEM, 0 }, 1329a52eda8c5dd9df763a63f9b71cd24847f014737Iliyan Malchev { "/dev/akm8973_aot", 0640, AID_COMPASS, AID_SYSTEM, 0 }, 1339a52eda8c5dd9df763a63f9b71cd24847f014737Iliyan Malchev { "/dev/bma150", 0640, AID_COMPASS, AID_SYSTEM, 0 }, 1343306e0678c5e68c1b7e8d5c99499b7645e4952f3Iliyan Malchev { "/dev/cm3602", 0640, AID_COMPASS, AID_SYSTEM, 0 }, 1354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/akm8976_pffd", 0640, AID_COMPASS, AID_SYSTEM, 0 }, 1363bc1e9cd7b2832d51c442c0342054e0235a383f6Iliyan Malchev { "/dev/lightsensor", 0640, AID_SYSTEM, AID_SYSTEM, 0 }, 1374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/msm_pcm_out", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 1384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/msm_pcm_in", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 1394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/msm_pcm_ctl", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 1405ae090ed949cea9d1e7ab1552b455a229f8f9757The Android Open Source Project { "/dev/msm_snd", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 1414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/msm_mp3", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 142c822213603107b72bca90bd2984f4781dfcf22c4Brian Swetland { "/dev/audience_a1026", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 1431340a095ac9f1ea007752288a4407490ddb6935cIliyan Malchev { "/dev/tpa2018d1", 0660, AID_SYSTEM, AID_AUDIO, 1 }, 144dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "/dev/msm_audpre", 0660, AID_SYSTEM, AID_AUDIO, 0 }, 145c822213603107b72bca90bd2984f4781dfcf22c4Brian Swetland { "/dev/msm_audio_ctl", 0660, AID_SYSTEM, AID_AUDIO, 0 }, 146dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project { "/dev/htc-acoustic", 0660, AID_SYSTEM, AID_AUDIO, 0 }, 147c84016778f9efd0d15f3c5ad7b7109833fb45c9aDima Zavin { "/dev/vdec", 0660, AID_SYSTEM, AID_AUDIO, 0 }, 1488234aa375896718e19b4450bcb44fa4376f53486Dima Zavin { "/dev/q6venc", 0660, AID_SYSTEM, AID_AUDIO, 0 }, 1491ccef18e69acdc4276a6c4a0c449ced6be395fc3Masaki Sato { "/dev/snd/dsp", 0660, AID_SYSTEM, AID_AUDIO, 0 }, 1501ccef18e69acdc4276a6c4a0c449ced6be395fc3Masaki Sato { "/dev/snd/dsp1", 0660, AID_SYSTEM, AID_AUDIO, 0 }, 1511ccef18e69acdc4276a6c4a0c449ced6be395fc3Masaki Sato { "/dev/snd/mixer", 0660, AID_SYSTEM, AID_AUDIO, 0 }, 1524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/smd0", 0640, AID_RADIO, AID_RADIO, 0 }, 1534a762357d05fe2152dbe5d4b7085d01a5d4ccbf2Jack Veenstra { "/dev/qemu_trace", 0666, AID_SYSTEM, AID_SYSTEM, 0 }, 1544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/qmi", 0640, AID_RADIO, AID_RADIO, 0 }, 1554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/qmi0", 0640, AID_RADIO, AID_RADIO, 0 }, 1564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/qmi1", 0640, AID_RADIO, AID_RADIO, 0 }, 1574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { "/dev/qmi2", 0640, AID_RADIO, AID_RADIO, 0 }, 158e910ea596240d355a1e25b66f76fd8d8fdfbbba6Erik Gilling /* CDMA radio interface MUX */ 159e910ea596240d355a1e25b66f76fd8d8fdfbbba6Erik Gilling { "/dev/ts0710mux", 0640, AID_RADIO, AID_RADIO, 1 }, 16088dc657d50cb3289a9011828c497eee996ed958cChia-chi Yeh { "/dev/ppp", 0660, AID_RADIO, AID_VPN, 0 }, 16188dc657d50cb3289a9011828c497eee996ed958cChia-chi Yeh { "/dev/tun", 0640, AID_VPN, AID_VPN, 0 }, 1624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project { NULL, 0, 0, 0, 0 }, 1634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 1644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* devperms_partners list and perm_node are for hardware specific /dev entries */ 1664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perm_node { 1674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perms_ dp; 1684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct listnode plist; 1694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 1704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectlist_declare(devperms_partners); 1714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* 1734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Permission override when in emulator mode, must be parsed before 1744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * system properties is initalized. 1754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 1764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int qemu_perm_count; 1774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic struct perms_ qemu_perms[MAX_QEMU_PERM + 1]; 1784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectint add_devperms_partners(const char *name, mode_t perm, unsigned int uid, 1804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid, unsigned short prefix) { 1814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int size; 1824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perm_node *node = malloc(sizeof (struct perm_node)); 1834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!node) 1844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project size = strlen(name) + 1; 1874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if ((node->dp.name = malloc(size)) == NULL) 1884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project memcpy(node->dp.name, name, size); 1914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.perm = perm; 1924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.uid = uid; 1934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.gid = gid; 1944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.prefix = prefix; 1954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project list_add_tail(&devperms_partners, &node->plist); 1974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 1984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectvoid qemu_init(void) { 2014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project qemu_perm_count = 0; 2024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project memset(&qemu_perms, 0, sizeof(qemu_perms)); 2034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int qemu_perm(const char* name, mode_t perm, unsigned int uid, 2064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid, unsigned short prefix) 2074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *buf; 2094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (qemu_perm_count == MAX_QEMU_PERM) 2104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOSPC; 2114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project buf = malloc(strlen(name) + 1); 2134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!buf) 2144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -errno; 2154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project strlcpy(buf, name, strlen(name) + 1); 2174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project qemu_perms[qemu_perm_count].name = buf; 2184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project qemu_perms[qemu_perm_count].perm = perm; 2194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project qemu_perms[qemu_perm_count].uid = uid; 2204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project qemu_perms[qemu_perm_count].gid = gid; 2214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project qemu_perms[qemu_perm_count].prefix = prefix; 2224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project qemu_perm_count++; 2244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 2254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* Permission overrides for emulator that are parsed from /proc/cmdline. */ 2284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectvoid qemu_cmdline(const char* name, const char *value) 2294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *buf; 2314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!strcmp(name, "android.ril")) { 2324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* cmd line params currently assume /dev/ prefix */ 2334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (asprintf(&buf, CMDLINE_PREFIX"/%s", value) == -1) { 2344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 2354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project INFO("nani- buf:: %s\n", buf); 2374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project qemu_perm(buf, 0660, AID_RADIO, AID_ROOT, 0); 2384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int get_device_perm_inner(struct perms_ *perms, const char *path, 2424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned *uid, unsigned *gid, mode_t *perm) 2434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int i; 2454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project for(i = 0; perms[i].name; i++) { 2464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(perms[i].prefix) { 2484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strncmp(path, perms[i].name, strlen(perms[i].name))) 2494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 2504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 2514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(path, perms[i].name)) 2524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 2534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *uid = perms[i].uid; 2554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *gid = perms[i].gid; 2564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *perm = perms[i].perm; 2574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 2584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 2604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* First checks for emulator specific permissions specified in /proc/cmdline. */ 2634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid) 2644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 2664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (get_device_perm_inner(qemu_perms, path, uid, gid, &perm) == 0) { 2684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return perm; 2694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if (get_device_perm_inner(devperms, path, uid, gid, &perm) == 0) { 2704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return perm; 2714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 2724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct listnode *node; 2734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perm_node *perm_node; 2744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perms_ *dp; 2754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* Check partners list. */ 2774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project list_for_each(node, &devperms_partners) { 2784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project perm_node = node_to_item(node, struct perm_node, plist); 2794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dp = &perm_node->dp; 2804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (dp->prefix) { 2824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (strncmp(path, dp->name, strlen(dp->name))) 2834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 2844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 2854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (strcmp(path, dp->name)) 2864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 2874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* Found perm in partner list. */ 2894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *uid = dp->uid; 2904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *gid = dp->gid; 2914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return dp->perm; 2924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* Default if nothing found. */ 2944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *uid = 0; 2954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project *gid = 0; 2964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0600; 2974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 2984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void make_device(const char *path, int block, int major, int minor) 3014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned uid; 3034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned gid; 3044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t mode; 3054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev_t dev; 3064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(major > 255 || minor > 255) 3084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 3094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR); 3114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev = (major << 8) | minor; 3126405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly /* Temporarily change egid to avoid race condition setting the gid of the 3136405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * device node. Unforunately changing the euid would prevent creation of 3146405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * some device nodes, so the uid has to be set with chown() and is still 3156405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * racy. Fixing the gid race at least fixed the issue with system_server 3166405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * opening dynamic input devices under the AID_INPUT gid. */ 3176405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(gid); 3184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mknod(path, mode, dev); 3196405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly chown(path, uid, -1); 3206405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(AID_ROOT); 3214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3231e070846f8908dff15086efa12fbba01ab7eae15Chuck Tuffli#if LOG_UEVENTS 3244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic inline suseconds_t get_usecs(void) 3264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct timeval tv; 3284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project gettimeofday(&tv, 0); 3294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return tv.tv_sec * (suseconds_t) 1000000 + tv.tv_usec; 3304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(x...) INFO(x) 3334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#else 3354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(fmt, args...) do { } while (0) 3374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define get_usecs() 0 3384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#endif 3404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void parse_event(const char *msg, struct uevent *uevent) 3424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = ""; 3444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = ""; 3454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = ""; 3464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = ""; 3474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = -1; 3484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = -1; 3494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* currently ignoring SEQNUM */ 3514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg) { 3524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strncmp(msg, "ACTION=", 7)) { 3534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 7; 3544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = msg; 3554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "DEVPATH=", 8)) { 3564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 8; 3574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = msg; 3584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "SUBSYSTEM=", 10)) { 3594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 10; 3604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = msg; 3614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "FIRMWARE=", 9)) { 3624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 9; 3634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = msg; 3644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MAJOR=", 6)) { 3654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = atoi(msg); 3674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MINOR=", 6)) { 3684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = atoi(msg); 3704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* advance to after the next \0 */ 3734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg++) 3744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ; 3754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("event { '%s', '%s', '%s', '%s', %d, %d }\n", 3784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action, uevent->path, uevent->subsystem, 3794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware, uevent->major, uevent->minor); 3804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_device_event(struct uevent *uevent) 3834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char devpath[96]; 3854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *base, *name; 3864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int block; 3874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* if it's not a /dev device, nothing to do */ 3894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if((uevent->major < 0) || (uevent->minor < 0)) 3904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 3914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* do we have a name? */ 3934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name = strrchr(uevent->path, '/'); 3944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!name) 3954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 3964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name++; 3974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* too-long names would overrun our buffer */ 3994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strlen(name) > 64) 4004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 4014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* are we block or char? where should we live? */ 40335237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project if(!strncmp(uevent->subsystem, "block", 5)) { 4044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project block = 1; 4054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/block/"; 4064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 4074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 4084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project block = 0; 4094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* this should probably be configurable somehow */ 41035237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project if(!strncmp(uevent->subsystem, "graphics", 8)) { 4114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/graphics/"; 4124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 41335237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if (!strncmp(uevent->subsystem, "oncrpc", 6)) { 4144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/oncrpc/"; 4154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 41635237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if (!strncmp(uevent->subsystem, "adsp", 4)) { 4174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/adsp/"; 4184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 419fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev } else if (!strncmp(uevent->subsystem, "msm_camera", 10)) { 420fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev base = "/dev/msm_camera/"; 421fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev mkdir(base, 0755); 422fc0182eb1db0620eb71fb6ca219b15a17dcd912fIliyan Malchev } else if(!strncmp(uevent->subsystem, "input", 5)) { 4234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/input/"; 4244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 42535237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if(!strncmp(uevent->subsystem, "mtd", 3)) { 4264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/mtd/"; 4274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 4285bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang } else if(!strncmp(uevent->subsystem, "sound", 5)) { 4295bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang base = "/dev/snd/"; 4305bb44c8ea2bc513fefc526918980ab3d17494eccXiaopeng Yang mkdir(base, 0755); 43135237d135807af84bf9b0e5b8d7f8633e58db6f5The Android Open Source Project } else if(!strncmp(uevent->subsystem, "misc", 4) && 4324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project !strncmp(name, "log_", 4)) { 4334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/log/"; 4344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mkdir(base, 0755); 4354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project name += 4; 4364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else 4374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project base = "/dev/"; 4384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project snprintf(devpath, sizeof(devpath), "%s%s", base, name); 4414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strcmp(uevent->action, "add")) { 4434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project make_device(devpath, block, uevent->major, uevent->minor); 4444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 4454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strcmp(uevent->action, "remove")) { 4484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unlink(devpath); 4494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 4504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 4524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int load_firmware(int fw_fd, int loading_fd, int data_fd) 4544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 4554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct stat st; 4564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project long len_to_copy; 4574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int ret = 0; 4584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fstat(fw_fd, &st) < 0) 4604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 4614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy = st.st_size; 4624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "1", 1); /* start transfer */ 4644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (len_to_copy > 0) { 4664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char buf[PAGE_SIZE]; 4674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nr; 4684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr = read(fw_fd, buf, sizeof(buf)); 4704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!nr) 4714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 4724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nr < 0) { 4734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 4744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 4754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy -= nr; 4784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (nr > 0) { 4794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nw = 0; 4804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nw = write(data_fd, buf + nw, nr); 4824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nw <= 0) { 4834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 4844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto out; 4854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr -= nw; 4874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectout: 4914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!ret) 4924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "0", 1); /* successful end of transfer */ 4934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 4944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "-1", 2); /* abort transfer */ 4954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return ret; 4974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 4984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 4994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void process_firmware_event(struct uevent *uevent) 5004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 5014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *root, *loading, *data, *file; 5024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int l, loading_fd, data_fd, fw_fd; 5034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("firmware event { '%s', '%s' }\n", 5054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path, uevent->firmware); 5064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path); 5084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 5104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&loading, "%sloading", root); 5124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto root_free_out; 5144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&data, "%sdata", root); 5164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_free_out; 5184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&file, FIRMWARE_DIR"/%s", uevent->firmware); 5204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 5214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto data_free_out; 5224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project loading_fd = open(loading, O_WRONLY); 5244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(loading_fd < 0) 5254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto file_free_out; 5264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project data_fd = open(data, O_WRONLY); 5284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(data_fd < 0) 5294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_close_out; 5304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fw_fd = open(file, O_RDONLY); 5324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fw_fd < 0) 5334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto data_close_out; 5344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!load_firmware(fw_fd, loading_fd, data_fd)) 5364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("firmware copy success { '%s', '%s' }\n", root, file); 5374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 5384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("firmware copy failure { '%s', '%s' }\n", root, file); 5394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fw_fd); 5414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_close_out: 5424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(data_fd); 5434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_close_out: 5444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(loading_fd); 5454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectfile_free_out: 5464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(file); 5474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_free_out: 5484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(data); 5494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_free_out: 5504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(loading); 5514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectroot_free_out: 5524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(root); 5534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_firmware_event(struct uevent *uevent) 5564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 5574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid_t pid; 5584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->subsystem, "firmware")) 5604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 5614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->action, "add")) 5634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 5644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* we fork, to avoid making large memory allocations in init proper */ 5664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid = fork(); 5674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!pid) { 5684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project process_firmware_event(uevent); 5694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(EXIT_SUCCESS); 5704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define UEVENT_MSG_LEN 1024 5744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectvoid handle_device_fd(int fd) 5754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 5765f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich for(;;) { 5775f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich char msg[UEVENT_MSG_LEN+2]; 5785f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich char cred_msg[CMSG_SPACE(sizeof(struct ucred))]; 5795f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct iovec iov = {msg, sizeof(msg)}; 5805f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct sockaddr_nl snl; 5815f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct msghdr hdr = {&snl, sizeof(snl), &iov, 1, cred_msg, sizeof(cred_msg), 0}; 5825f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich 5835f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich ssize_t n = recvmsg(fd, &hdr, 0); 5845f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if (n <= 0) { 5855f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich break; 5865f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich } 5874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 5885f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if ((snl.nl_groups != 1) || (snl.nl_pid != 0)) { 5895f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich /* ignoring non-kernel netlink multicast message */ 5905f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich continue; 5915f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich } 5925f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich 5935f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct cmsghdr * cmsg = CMSG_FIRSTHDR(&hdr); 5945f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if (cmsg == NULL || cmsg->cmsg_type != SCM_CREDENTIALS) { 5955f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich /* no sender credentials received, ignore message */ 5965f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich continue; 5975f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich } 5985f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich 5995f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct ucred * cred = (struct ucred *)CMSG_DATA(cmsg); 6005f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if (cred->uid != 0) { 6015f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich /* message from non-root user, ignore */ 6025f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich continue; 6035f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich } 6044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6055f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if(n >= UEVENT_MSG_LEN) /* overflow -- discard */ 6064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 6074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n] = '\0'; 6094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n+1] = '\0'; 6104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6115f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct uevent uevent; 6124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project parse_event(msg, &uevent); 6134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_device_event(&uevent); 6154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_firmware_event(&uevent); 6164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* Coldboot walks parts of the /sys tree and pokes the uevent files 6204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** to cause the kernel to regenerate device add events that happened 6214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** before init's device manager was started 6224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** 6234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** We drain any pending events from the netlink socket every time 6244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** we poke another uevent file to make sure we don't overrun the 6254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** socket's buffer. 6264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project*/ 6274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void do_coldboot(int event_fd, DIR *d) 6294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct dirent *de; 6314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int dfd, fd; 6324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dfd = dirfd(d); 6344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, "uevent", O_WRONLY); 6364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd >= 0) { 6374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(fd, "add\n", 4); 6384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 6394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_device_fd(event_fd); 6404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while((de = readdir(d))) { 6434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d2; 6444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(de->d_type != DT_DIR || de->d_name[0] == '.') 6464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 6474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); 6494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd < 0) 6504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 6514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project d2 = fdopendir(fd); 6534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d2 == 0) 6544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 6554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else { 6564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project do_coldboot(event_fd, d2); 6574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d2); 6584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void coldboot(int event_fd, const char *path) 6634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d = opendir(path); 6654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d) { 6664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project do_coldboot(event_fd, d); 6674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d); 6684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectint device_init(void) 6724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project suseconds_t t0, t1; 6744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int fd; 6754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = open_uevent_socket(); 6774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd < 0) 6784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 6794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fcntl(fd, F_SETFD, FD_CLOEXEC); 6814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fcntl(fd, F_SETFL, O_NONBLOCK); 6824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project t0 = get_usecs(); 6844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project coldboot(fd, "/sys/class"); 6854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project coldboot(fd, "/sys/block"); 6864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project coldboot(fd, "/sys/devices"); 6874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project t1 = get_usecs(); 6884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); 6904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return fd; 6924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 693