{"id":3149,"url":"https://patchwork.libcamera.org/api/patches/3149/?format=json","web_url":"https://patchwork.libcamera.org/patch/3149/","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":"<20200318001009.32512-4-kgupta@es.iitr.ac.in>","date":"2020-03-18T00:10:06","name":"[libcamera-devel,v2,3/6] libcamera: utils: add Libcamera installed & path","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"5a79e60455e07092f6f51899959bd2c08611d3f0","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/3149/mbox/","series":[{"id":729,"url":"https://patchwork.libcamera.org/api/series/729/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=729","date":"2020-03-18T00:10:03","name":"libcamera: determine IPA_PROXY_PATH at runtime","version":2,"mbox":"https://patchwork.libcamera.org/series/729/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/3149/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/3149/checks/","tags":{},"headers":{"Return-Path":"","Received":["from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com\n\t[IPv6:2607:f8b0:4864:20::52f])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 0B59A60422\n\tfor ;\n\tWed, 18 Mar 2020 01:10:41 +0100 (CET)","by mail-pg1-x52f.google.com with SMTP id t24so12632084pgj.7\n\tfor ;\n\tTue, 17 Mar 2020 17:10:40 -0700 (PDT)","from kaaira-HP-Pavilion-Notebook ([103.113.213.153])\n\tby smtp.gmail.com with ESMTPSA id\n\tgv7sm460563pjb.16.2020.03.17.17.10.38\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tTue, 17 Mar 2020 17:10:39 -0700 (PDT)"],"DKIM-Signature":"v=1; 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\n\tTue, 17 Mar 2020 17:10:39 -0700 (PDT)","From":"Kaaira Gupta ","To":"kieran.bingham@ideasonboard.com, libcamera-devel@lists.libcamera.org,\n\tHelen Koike ,\n\tVaishali Thakkar ","Cc":"Kaaira Gupta ","Date":"Wed, 18 Mar 2020 05:40:06 +0530","Message-Id":"<20200318001009.32512-4-kgupta@es.iitr.ac.in>","X-Mailer":"git-send-email 2.17.1","In-Reply-To":"<20200318001009.32512-1-kgupta@es.iitr.ac.in>","References":"<20200318001009.32512-1-kgupta@es.iitr.ac.in>","Subject":"[libcamera-devel] [PATCH LIBCAMERA v2 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 00:10:41 -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/utils.cpp | 48 +++++++++++++++++++++++++++++++++++++++++\n 1 file changed, 48 insertions(+)","diff":"diff --git a/src/libcamera/utils.cpp b/src/libcamera/utils.cpp\nindex f566e88..1f6ec60 100644\n--- a/src/libcamera/utils.cpp\n+++ b/src/libcamera/utils.cpp\n@@ -12,6 +12,9 @@\n #include \n #include \n #include \n+#include \n+#include \n+#include \n \n /**\n * \\file utils.h\n@@ -310,6 +313,51 @@ 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/* musl doesn't declare _DYNAMIC in link.h, declare it manually. */\n+\textern ElfW(Dyn) _DYNAMIC[];\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","v2","3/6"]}