{"id":585,"date":"2013-06-15T16:02:27","date_gmt":"2013-06-15T08:02:27","guid":{"rendered":"http:\/\/guoh.ai\/lifelog\/?p=585"},"modified":"2013-12-09T10:52:42","modified_gmt":"2013-12-09T02:52:42","slug":"sample-of-customized-service-on-android-platform","status":"publish","type":"post","link":"https:\/\/guoh.ai\/lifelog\/2013\/06\/sample-of-customized-service-on-android-platform\/","title":{"rendered":"\u600e\u6837\u4e3aAndroid\u6dfb\u52a0\u4e00\u4e2a\u7cfb\u7edf\u7ea7\u670d\u52a1"},"content":{"rendered":"

\u5185\u5bb9\u5747\u6765\u81ea\u4e8e\u7f51\u7edc\u8d44\u6599\uff0c\u6e90\u7801\u4ee5\u53ca\u81ea\u5df1\u7684\u7406\u89e3\uff0c\u5982\u6709\u9519\u8bef\u7684\u5730\u65b9\u8fd8\u8bf7\u6307\u51fa\uff01\u793a\u4f8b\u6e90\u7801\u53ef\u4ee5\u968f\u610f\u4f7f\u7528\u3002<\/p>\n

\u6211\u8fd9\u91cc\u4f7f\u7528\u7684\u73af\u5883\u5982\u4e0b<\/p>\n

PLATFORM_VERSION_CODENAME=AOSP\r\nPLATFORM_VERSION=4.0.9.99.999.9999.99999\r\nTARGET_PRODUCT=full_panda\r\nTARGET_BUILD_VARIANT=userdebug\r\nTARGET_BUILD_TYPE=release<\/pre>\n
Android\u63d0\u4f9b\u4e86\u4e00\u4e9b\u57fa\u7840\u670d\u52a1\uff0c\u4f46\u662f\u5982\u679c\u4f60\u60f3\u7ed9\u5b83\u6dfb\u52a0\u4e00\u4e9b\u7279\u5b9a\u7684\u670d\u52a1\u7684\u8bdd\uff0c\u4e5f\u662f\u53ef\u4ee5\u7684(\u6bd4\u5982\u5728\u4e00\u76f4\u5230\u67d0\u4e9b\u7279\u5b9a\u7684\u5e73\u53f0\u4e0b\uff0c\u9700\u8981\u589e\u52a0\/\u88c1\u526a\u4e00\u4e9b\u670d\u52a1)<\/p>\n
\u6bd4\u5982\u6211\u4eec\u90fd\u77e5\u9053Android\u4e0a\u7528\u7684\u6700\u5e7f\u6cdb\u7684\u5e94\u8be5\u662f\u591a\u5a92\u4f53\u670d\u52a1\uff0c\u5176\u5bf9\u5e94\u7684\u6709\u4e00\u4e2amediaserver\u8fdb\u7a0b\uff0c\u7136\u540e\u6bd4\u5982\u6211\u4eec\u7684
\nAudioFlinger\/MediaPlayerService\/CameraService\/AudioPolicyService
\n\u90fd\u662f\u8dd1\u5728\u8fd9\u4e2a\u8fdb\u7a0b\u91cc\u9762\u7684<\/p>\n
\u90a3\u5982\u679c\u6211\u4eec\u60f3\u81ea\u5df1\u589e\u52a0\u4e00\u4e2a\u7c7b\u4f3c\u7684\u4e1c\u897f\u53ef\u4e0d\u53ef\u4ee5\u5462\uff1f\u7b54\u6848\u5f53\u7136\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n
\u5f88\u7b80\u5355\u7684\u51e0\u70b9\u5c31\u53ef\u4ee5\u5e2e\u4f60\u5b8c\u6210<\/p>\n
\u542f\u52a8\u8fdb\u7a0b<\/p>\n
\/path\/to\/aosp\/frameworks\/base\/customized_service\/server<\/pre>\n
\u5177\u4f53\u670d\u52a1\u5b9e\u73b0<\/p>\n
\/path\/to\/aosp\/frameworks\/base\/customized_service\/libcustomizedservice<\/pre>\n
\u7cfb\u7edf\u5f00\u673a\u542f\u52a8<\/p>\n
\/path\/to\/aosp\/system\/core\/rootdir\/init.rc<\/pre>\n
\u6dfb\u52a0\u5982\u4e0b\u5185\u5bb9\u5230init.rc\u6587\u4ef6<\/p>\n
service customized \/system\/bin\/customizedserver\r\n    class main\r\n    user media\r\n    group audio camera<\/pre>\n
\u6211\u662f\u7528\u7684Pandaboard
\n\u7f16\u8bd1\u6574\u4e2aROM\uff0c\u7136\u540efastboot flashall<\/p>\n
I\/        ( 1080): ServiceManager: 0x40ce4f00\r\nD\/        ( 1080): CustomizedService instantiate\r\nD\/        ( 1080): CustomizedService created\r\nE\/ServiceManager(   94): add_service('test.customized',0x44) uid=xxxx - PERMISSION DENIED\r\nD\/        ( 1080): CustomizedService r = -1\r\nD\/        ( 1080): CustomizedService destroyed<\/pre>\n
\u6216\u8005\u4f60\u60f3\u4eceshell\u5f53\u4e2d\u542f\u52a8\u8fd9\u4e2a\u670d\u52a1\u7684\u8fdb\u7a0b\u4e5f\u4f1a\u51fa\u73b0\u7c7b\u4f3c\u6743\u9650\u4e0d\u8db3\u7684\u95ee\u9898\uff0c\u8ffd\u4e00\u4e0blog\u5c31\u5f88\u5feb\u4f1a\u53d1\u73b0\u95ee\u9898<\/p>\n
int do_add_service(struct binder_state *bs,\r\n                   uint16_t *s, unsigned len,\r\n                   void *ptr, unsigned uid, int allow_isolated)\r\n{\r\n    struct svcinfo *si;\r\n\r\n    if (!ptr || (len == 0) || (len > 127))\r\n        return -1;\r\n\r\n    if (!svc_can_register(uid, s)) {\r\n        ALOGE("add_service('%s',%p) uid=%d - PERMISSION DENIED\\n",\r\n             str8(s), ptr, uid);\r\n        return -1;\r\n    }\r\n\r\n    si = find_svc(s, len);\r\n \r\n    ......\r\n\r\n    binder_acquire(bs, ptr);\r\n    binder_link_to_death(bs, ptr, &si->death);\r\n    return 0;\r\n}<\/pre>\n
int svc_can_register(unsigned uid, uint16_t *name)
\n{
\n    unsigned n;<\/p>\n
    if ((uid == 0) || (uid == AID_SYSTEM))
\n        return 1;<\/p>\n
    for (n = 0; n < sizeof(allowed) \/ sizeof(allowed[0]); n++)\n        if ((uid == allowed[n].uid) && str16eq(name, allowed[n].name))\n            return 1;\n\n    return 0;\n}\n[\/code]\n\u53ef\u4ee5\u770b\u51fa\u80fd\u6ce8\u518cservice\u7684\u7528\u6237\u7684uid\u53ea\u80fd\u662f0\u5373ROOT\u6216\u8005\u662fAID_SYSTEM\uff0c\u6216\u8005\u662fallowed\u5217\u8868\u5f53\u4e2d\u7684\u670d\u52a1\uff0c\u6700\u7b80\u5355\u7684\u5c31\u662f\u628a\u6240\u8981\u6dfb\u52a0\u7684\u670d\u52a1\u52a0\u5230\u5217\u8868\u5f53\u4e2d\n[code lang=\"java\"]{ AID_MEDIA, \"test.customized\" },[\/code]\n\u800c\u670d\u52a1allowed\u5217\u8868\u4f4d\u4e8e\n[bash]\/path\/to\/aosp\/frameworks\/base\/cmds\/servicemanager\/service_manager.c[\/bash]\n\u91cd\u65b0\u7f16\u8bd1ROM\uff0c\u70e7\u5b8c\u4e4b\u540e\u542f\u52a8\u770b\u5230customizedservice\u8fd9\u4e2a\u8fdb\u7a0b\u8d77\u6765\u7684\u8bdd\uff0c\u5c31\u591a\u534a\u8868\u660e\u670d\u52a1\u52a0\u597d\u4e86\n\nApp\u7aef\u600e\u4e48\u8c03\u7528\uff1f\n\n\u5199\u4e2aActivity\u5229\u7528android.os.ServiceManager\u7684getService\u83b7\u53d6\u5230\u6307\u5b9a\u7684\u670d\u52a1\uff0c\u7136\u540e\u8c03\u7528\u5c31\u53ef\u4ee5\u4e86\u3002\n\u8fd9\u91cc\u9700\u8981\u8bf4\u660e\u4e0b\u7684\u5c31\u662f\u76ee\u524dandroid.os.ServiceManager\u5bf9\u4e8eapp\u6765\u8bf4\u662fhide\u6389\u7684\uff0c\u6211\u4eec\u6682\u4e14\u53ef\u4ee5\u4e0d\u7ba1\uff0c\u7528\u4e2a\u53cd\u5c04\u5148\u7528\u7740\u3002\n\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u8981hide\u6389\uff0c\u96be\u9053Android\u4e0d\u60f3\u8ba9\u6211\u4eec\u81ea\u5df1\u5b9a\u4e49\u7cfb\u7edf\u7ea7\u522b\u7684service\u6765\u4f7f\u7528\uff1f\u8fd8\u662f\u8bf4\u7528\u5176\u4ed6\u7684\u65b9\u5f0f\u53ef\u4ee5\u5b8c\u6210\uff0c\u76ee\u524d\u6211\u4e5f\u4e0d\u6e05\u695a\uff01\n\n\u76ee\u524d\u7ed3\u679c\u5c31\u662f\u901a\u8fc7getService\u80fd\u83b7\u53d6\u5230\u6211\u4eec\u7684\u670d\u52a1\uff0c\u5e76\u4e14\u6210\u529f\u8c03\u7528\uff0c\u4f46\u662f\u56e0\u4e3a\u6211\u8fd4\u56de\u7684\u53c2\u6570\u6709String\u6709int\uff0c\u800cString\u6ca1\u6709\u83b7\u53d6\u51fa\u6765\uff0c\u90fd\u77e5\u9053Parcel\u7684\u53c2\u6570\u987a\u5e8f\u662f\u5f88\u91cd\u8981\u7684\uff0c\u53ef\u80fd\u662f\u8fd9\u4e2a\u7684\u539f\u56e0\uff0c\u540e\u9762\u518d\u6765\u770b\u770b\u5230\u5e95\u662f\u4ec0\u4e48\u539f\u56e0\uff0c\u76ee\u524d\u5c31\u662f\u628acustomized service\u8fd9\u4e00\u5957\u5148\u8dd1\u901a\u3002\n\nP.S. \u540e\u6765\u4e00\u6b21\u53d1\u73b0\u53ef\u80fd\u662f\u6211\u6bcf\u6b21\u7f16\u8bd1\u7684so\u6863\u6848\u6ca1\u6709\u8fdb\u5230ROM\u5f53\u4e2d\u53bb\uff0c\u6240\u4ee5\u70e7\u5230\u8bbe\u5907\u7684so\u6863\u6848\u4e0d\u662f\u6700\u65b0\u7684\uff0c\u5c31\u6ca1\u6709\u628a\u540e\u9762\u52a0\u7684String\u83b7\u53d6\u51fa\u6765(\u4e4b\u524d\u662f\u4e24\u4e2aint\u578b\u6570\u636e)\u3002\n\u53e6\u5916\u6211\u8fd8\u505a\u4e86\u4e2a\u5b9e\u9a8c\uff0c\u5c31\u662f\u5728service\u7aef\u901a\u8fc7ServiceManager\u7684getService(...)\u65b9\u6cd5\u518d\u6b21\u8bbf\u95ee\u5f53\u524dservice\uff0c\u8fd9\u4e2a\u5c31\u76f8\u5f53\u4e8e\u5728\u5f53\u524d\u4ee3\u7801\u4e2d\u901a\u8fc7\u4e00\u4e2a\u6307\u9488\u6216\u8005\u5f15\u7528\u8bbf\u95ee\u7684\u6548\u679c\u662f\u4e00\u6837\u7684\uff0c\u8fd9\u5c31\u662fBinder\u7684\u5f3a\u5927\u4e4b\u5904\u5427\uff01\u6b64\u6539\u52a8\u53ef\u4ee5\u53c2\u89c1\u4ee5\u4e0bcommit\uff1a\n\n\n
commit 1875ad41d5f8e505cb4c26599e4626944005f26b
\nDate:   Tue Jun 25 12:10:59 2013 +0800<\/p>\n
    Symptom: test invoking getService in same process with service
\n    Issue ID: NA
\n    Root Cause: NA
\n    Solution: NA\n<\/p><\/blockquote>\n
\u5b8c\u6574\u4ee3\u7801\u53c2\u89c1
\nhttps:\/\/github.com\/guohai\/and-customized-service.git<\/a><\/p>\n
\u8fd9\u91cc\u662fJava\u7aef\u8c03\u7528native\u7aef\u7684\u670d\u52a1\uff0c\u5176\u5b9e\u4e5f\u53ef\u4ee5native\u8c03\u7528native\u7684\u670d\u52a1\uff0c\u8fd9\u91cc\u6682\u65f6\u5c31\u4e0d\u518d\u53bb\u5177\u4f53\u5b9e\u73b0\u4e86\uff0c\u9700\u8981\u7684\u8bdd\uff0c\u4f1a\u518d\u6765\u5199\u3002<\/p>\n
\u65e0\u56fe\u65e0\u771f\u76f8
\n\"add-customized-service-for-android\"<\/a>
\n\"add-customized-service-for-android-1\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u5185\u5bb9\u5747\u6765\u81ea\u4e8e\u7f51\u7edc\u8d44\u6599\uff0c\u6e90\u7801\u4ee5\u53ca\u81ea\u5df1\u7684\u7406\u89e3\uff0c\u5982\u6709\u9519\u8bef\u7684\u5730\u65b9\u8fd8\u8bf7\u6307\u51fa\uff01\u793a\u4f8b\u6e90\u7801\u53ef\u4ee5\u968f\u610f\u4f7f\u7528\u3002 \u6211\u8fd9\u91cc\u4f7f\u7528\u7684\u73af\u5883\u5982\u4e0b PLATFORM_VERSION_CODENAME=AOSP PLATFORM_VERSION=4.0.9.99.999.9999.99999 TARGET_PRODUCT=full_panda TARGET_BUILD_VARIANT=userdebug TARGET_BUILD_TYPE=release Android\u63d0\u4f9b\u4e86\u4e00\u4e9b\u57fa\u7840\u670d\u52a1\uff0c\u4f46\u662f\u5982\u679c\u4f60\u60f3\u7ed9\u5b83\u6dfb\u52a0\u4e00\u4e9b\u7279\u5b9a\u7684\u670d\u52a1\u7684\u8bdd\uff0c\u4e5f\u662f\u53ef\u4ee5\u7684(\u6bd4\u5982\u5728\u4e00\u76f4\u5230\u67d0\u4e9b\u7279\u5b9a\u7684\u5e73\u53f0\u4e0b\uff0c\u9700\u8981\u589e\u52a0\/\u88c1\u526a\u4e00\u4e9b\u670d\u52a1) \u6bd4\u5982\u6211\u4eec\u90fd\u77e5\u9053Android\u4e0a\u7528\u7684\u6700\u5e7f\u6cdb\u7684\u5e94\u8be5\u662f\u591a\u5a92\u4f53\u670d\u52a1\uff0c\u5176\u5bf9\u5e94\u7684\u6709\u4e00\u4e2amediaserver\u8fdb\u7a0b\uff0c\u7136\u540e\u6bd4\u5982\u6211\u4eec\u7684 AudioFlinger\/MediaPlayerService\/CameraService\/AudioPolicyService \u90fd\u662f\u8dd1\u5728\u8fd9\u4e2a\u8fdb\u7a0b\u91cc\u9762\u7684 \u90a3\u5982\u679c\u6211\u4eec\u60f3\u81ea\u5df1\u589e\u52a0\u4e00\u4e2a\u7c7b\u4f3c\u7684\u4e1c\u897f\u53ef\u4e0d\u53ef\u4ee5\u5462\uff1f\u7b54\u6848\u5f53\u7136\u662f\u53ef\u4ee5\u7684\u3002 \u5f88\u7b80\u5355\u7684\u51e0\u70b9\u5c31\u53ef\u4ee5\u5e2e\u4f60\u5b8c\u6210 \u542f\u52a8\u8fdb\u7a0b \/path\/to\/aosp\/frameworks\/base\/customized_service\/server \u5177\u4f53\u670d\u52a1\u5b9e\u73b0 \/path\/to\/aosp\/frameworks\/base\/customized_service\/libcustomizedservice \u7cfb\u7edf\u5f00\u673a\u542f\u52a8 \/path\/to\/aosp\/system\/core\/rootdir\/init.rc \u6dfb\u52a0\u5982\u4e0b\u5185\u5bb9\u5230init.rc\u6587\u4ef6 service customized \/system\/bin\/customizedserver class main user media group audio camera \u6211\u662f\u7528\u7684Pandaboard \u7f16\u8bd1\u6574\u4e2aROM\uff0c\u7136\u540efastboot flashall I\/ ( 1080): ServiceManager: 0x40ce4f00 D\/ ( 1080): CustomizedService instantiate D\/ ( 1080): CustomizedService created E\/ServiceManager( 94): add_service('test.customized',0x44) uid=xxxx – PERMISSION DENIED … Continue reading \u600e\u6837\u4e3aAndroid\u6dfb\u52a0\u4e00\u4e2a\u7cfb\u7edf\u7ea7\u670d\u52a1<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gfmr_meta_descriptions":[],"_gfmr_multilingual_taxonomy_terms":[],"footnotes":""},"categories":[7,28,4],"tags":[],"class_list":["post-585","post","type-post","status-publish","format-standard","hentry","category-android","category-cpp","category-java"],"_links":{"self":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/585","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/comments?post=585"}],"version-history":[{"count":5,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/585\/revisions"}],"predecessor-version":[{"id":881,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/posts\/585\/revisions\/881"}],"wp:attachment":[{"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/media?parent=585"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/categories?post=585"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guoh.ai\/lifelog\/wp-json\/wp\/v2\/tags?post=585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}