{"id":3165,"url":"https://patchwork.libcamera.org/api/patches/3165/?format=json","web_url":"https://patchwork.libcamera.org/patch/3165/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20200318115846.7975-4-kgupta@es.iitr.ac.in>","date":"2020-03-18T11:58:43","name":"[libcamera-devel,v3,3/6] libcamera: utils: add Libcamera installed & path","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"1771a929655e80ce0c80c83393bb0030a9667cc6","submitter":{"id":39,"url":"https://patchwork.libcamera.org/api/people/39/?format=json","name":"Kaaira Gupta","email":"kgupta@es.iitr.ac.in"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/3165/mbox/","series":[{"id":731,"url":"https://patchwork.libcamera.org/api/series/731/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=731","date":"2020-03-18T11:58:40","name":"libcamera: determine IPA_PROXY_PATH at runtime","version":3,"mbox":"https://patchwork.libcamera.org/series/731/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/3165/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/3165/checks/","tags":{},"headers":{"Return-Path":"","Received":["from mail-pf1-x435.google.com (mail-pf1-x435.google.com\n\t[IPv6:2607:f8b0:4864:20::435])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 4E3A860419\n\tfor ;\n\tWed, 18 Mar 2020 12:59:24 +0100 (CET)","by mail-pf1-x435.google.com with SMTP id 2so13766006pfg.12\n\tfor ;\n\tWed, 18 Mar 2020 04:59:24 -0700 (PDT)","from kaaira-HP-Pavilion-Notebook ([103.113.213.153])\n\tby smtp.gmail.com with ESMTPSA id\n\ti11sm2378818pje.30.2020.03.18.04.59.21\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tWed, 18 Mar 2020 04:59:22 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=es-iitr-ac-in.20150623.gappssmtp.com; s=20150623;\n\th=from:to:cc:subject:date:message-id:in-reply-to:references;\n\tbh=mKogFjsmRN3byaPv0b/6ZZyVMnNZ8tddAXwdndhLKH0=;\n\tb=u14CwDODjdreSOhe+S5/2Iw7Bmqq2rKc5MIYmg9FelM4Fu9ILp6bjecor/qEKS8vAR\n\tOb1KJA9vQcYf1np6Wx/SJldcGqfW4isTpKQSX/p+whyHmW7Gc73xzbY0UGSx1w9gcljo\n\tWBGNhyIWjbHE5+nuntatv8o7gzETDZ+P0rgY2xumuXiwn0oA9LdMlaTHDM1SrSFASDVs\n\tXFxalksr4KpORQCG84/6S+pJnNyRKHnbMS67hpirVmUxacVLdOH9ZEmAinFUBja3fdsm\n\t2COrutuQyUI5MWEodUCB7A8aYKEXdMQF5KnfzgiCoTX0UAIrEZ/IqLL7T5nlQt5vsNgE\n\tCFQQ==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\n\t:references;\n\tbh=mKogFjsmRN3byaPv0b/6ZZyVMnNZ8tddAXwdndhLKH0=;\n\tb=jqDOiJbhfQ8sPnIOoWKG1hkIzNmxIg8QQ3BIUVlvtc4W9h9zeNPbQOC3bmyvStIFHc\n\t263hmGt2t5jgDTHlf542CHWDF8xb/GbQPek7NPJJuhqZrcYd++JMR8PdNbXAcuLbG2xd\n\tEJ4mH4RCojR0UZ13YmGeZMsEZqBgLWhrzIaqOKsRV8QLlY1P0ctzsZvijuUHwqaMswEd\n\tSDpAdJAhB/bukwjNqApDmV0bRulrsVKFv8Aa8JQHsJcFyCXKcoj9QlXtYkbyEPPgcYLt\n\t+9fPS1drFPZUY7WV0qqQasJI7Jd1SbHRz5iAehJ7cC1qH7L0XvtjSx1CzRBgMARmWww5\n\t50fw==","X-Gm-Message-State":"ANhLgQ0Nx0wK9CpS2paDA6M3WAgujfrC6SCt0fop3NUd2TC68z41I94a\n\tOpPMZu1aYAM6GXS0QP5Or+EHuQ==","X-Google-Smtp-Source":"ADFU+vuC/5vEGkQqxzRm7VlMppCyPeDQR+8AmrOh7WcL3kRqbA/0+VtT6yHbgX+wa/f62TvAczpcxQ==","X-Received":"by 2002:a62:1cf:: with SMTP id 198mr4062245pfb.246.1584532762859;\n\tWed, 18 Mar 2020 04:59:22 -0700 (PDT)","From":"Kaaira Gupta ","To":"Helen Koike ,\n\tVaishali Thakkar ,\n\tkieran.bingham@ideasonboard.com, libcamera-devel@lists.libcamera.org","Cc":"Kaaira Gupta ","Date":"Wed, 18 Mar 2020 17:28:43 +0530","Message-Id":"<20200318115846.7975-4-kgupta@es.iitr.ac.in>","X-Mailer":"git-send-email 2.17.1","In-Reply-To":"<20200318115846.7975-1-kgupta@es.iitr.ac.in>","References":"<20200318115846.7975-1-kgupta@es.iitr.ac.in>","Subject":"[libcamera-devel] [PATCH LIBCAMERA v3 3/6] libcamera: utils: add\n\tLibcamera installed & path","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","X-List-Received-Date":"Wed, 18 Mar 2020 11:59:24 -0000"},"content":"Add a global functions 'isLibcameraInstalled' to check if libcamera is\ninstalled or not, and another global function 'libcameraPath' to return\nthe path of libcamera.so in utils.\n\nSigned-off-by: Kaaira Gupta \n---\n src/libcamera/include/utils.h | 4 +++\n src/libcamera/utils.cpp | 48 +++++++++++++++++++++++++++++++++++\n 2 files changed, 52 insertions(+)","diff":"diff --git a/src/libcamera/include/utils.h b/src/libcamera/include/utils.h\nindex 9405977..bc96e79 100644\n--- a/src/libcamera/include/utils.h\n+++ b/src/libcamera/include/utils.h\n@@ -143,6 +143,10 @@ private:\n \n details::StringSplitter split(const std::string &str, const std::string &delim);\n \n+bool isLibcameraInstalled();\n+\n+std::string libcameraPath();\n+\n } /* namespace utils */\n \n } /* namespace libcamera */\ndiff --git a/src/libcamera/utils.cpp b/src/libcamera/utils.cpp\nindex f566e88..aeaf163 100644\n--- a/src/libcamera/utils.cpp\n+++ b/src/libcamera/utils.cpp\n@@ -12,12 +12,18 @@\n #include \n #include \n #include \n+#include \n+#include \n+#include \n \n /**\n * \\file utils.h\n * \\brief Miscellaneous utility functions\n */\n \n+/* musl doesn't declare _DYNAMIC in link.h, declare it manually. */\n+extern ElfW(Dyn) _DYNAMIC[];\n+\n namespace libcamera {\n \n namespace utils {\n@@ -310,6 +316,48 @@ details::StringSplitter split(const std::string &str, const std::string &delim)\n \treturn details::StringSplitter(str, delim);\n }\n \n+/**\n+ * \\brief Checks if Libcamera is installed or not\n+ *\n+ * Utilises the build_rpath dynamic tag which is stripped out by meson at\n+ * install time to determine at runtime if the library currently executing\n+ * has been installed or not.\n+ *\n+ * \\return A bool stating if libcamera is installed or not\n+ */\n+bool isLibcameraInstalled()\n+{\n+\t/*\n+\t * DT_RUNPATH (DT_RPATH when the linker uses old dtags) is removed on\n+\t * install.\n+\t */\n+\tfor (const ElfW(Dyn) *dyn = _DYNAMIC; dyn->d_tag != DT_NULL; ++dyn) {\n+\t\tif (dyn->d_tag == DT_RUNPATH || dyn->d_tag == DT_RPATH)\n+\t\t\treturn false;\n+\t}\n+\n+\treturn true;\n+}\n+\n+/**\n+ * \\brief Identifies libcamera path\n+ *\n+ * Identifies the location by finding the path of the active libcamera.so itself.\n+ *\n+ * \\return A string stating the path.\n+ */\n+std::string libcameraPath()\n+{\n+\tDl_info info;\n+\n+\t/* Look up our own symbol. */\n+\tint ret = dladdr(reinterpret_cast(libcameraPath), &info);\n+\tif (ret == 0)\n+\t\treturn nullptr;\n+\n+\treturn info.dli_fname;\n+}\n+\n } /* namespace utils */\n \n } /* namespace libcamera */\n","prefixes":["libcamera-devel","v3","3/6"]}