implemented os_info_t class

2 files changed, 374 insertions, 0 deletions

diff --git a/src/libimcv/os_info/os_info.c b/src/libimcv/os_info/os_info.c
new file mode 100644
index 000000000..4dbcee55f
--- /dev/null
+++ b/src/libimcv/os_info/os_info.c
@@ -0,0 +1,309 @@
+/*
+ * Copyright (C) 2012 Andreas Steffen
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "os_info.h"
+
+#include <sys/utsname.h>
+
+#include <utils/linked_list.h>
+#include <debug.h>
+
+
+typedef struct private_os_info_t private_os_info_t;
+
+
+/**
+ * Private data of an os_info_t object.
+ *
+ */
+struct private_os_info_t {
+
+	/**
+	 * Public os_info_t interface.
+	 */
+	os_info_t public;
+
+	/**
+	 * OS name
+	 */
+	chunk_t name;
+
+	/**
+	 * OS version
+	 */
+	chunk_t version;
+
+};
+
+METHOD(os_info_t, get_name, chunk_t,
+	private_os_info_t *this)
+{
+	return this->name;
+}
+
+METHOD(os_info_t, get_version, chunk_t,
+	private_os_info_t *this)
+{
+	return this->version;
+}
+
+METHOD(os_info_t, create_package_enumerator, enumerator_t*,
+	private_os_info_t *this)
+{
+	/* TODO */
+	return NULL;
+}
+
+
+METHOD(os_info_t, destroy, void,
+	private_os_info_t *this)
+{
+	free(this->name.ptr);
+	free(this->version.ptr);
+	free(this);
+}
+
+#define RELEASE_LSB		0
+#define RELEASE_DEBIAN	1
+
+/**
+ * Determine Linux distribution version and hardware platform
+ */
+static bool extract_platform_info(chunk_t *name, chunk_t *version)
+{
+	FILE *file;
+	u_char buf[BUF_LEN], *pos = buf;
+	int len = BUF_LEN - 1;
+	chunk_t os_name = chunk_empty;
+	chunk_t os_version = chunk_empty;
+	struct utsname uninfo;
+	int i;
+
+	/* Linux/Unix distribution release info (from http://linuxmafia.com) */
+	const char* releases[] = {
+		"/etc/lsb-release",           "/etc/debian_version",
+		"/etc/SuSE-release",          "/etc/novell-release",
+		"/etc/sles-release",          "/etc/redhat-release",
+		"/etc/fedora-release",        "/etc/gentoo-release",
+		"/etc/slackware-version",     "/etc/annvix-release",
+		"/etc/arch-release",          "/etc/arklinux-release",
+		"/etc/aurox-release",         "/etc/blackcat-release",
+		"/etc/cobalt-release",        "/etc/conectiva-release",
+		"/etc/debian_release",        "/etc/immunix-release",
+		"/etc/lfs-release",           "/etc/linuxppc-release",
+		"/etc/mandrake-release",      "/etc/mandriva-release",
+		"/etc/mandrakelinux-release", "/etc/mklinux-release",
+		"/etc/pld-release",           "/etc/redhat_version",
+		"/etc/slackware-release",     "/etc/e-smith-release",
+		"/etc/release",               "/etc/sun-release",
+		"/etc/tinysofa-release",      "/etc/turbolinux-release",
+		"/etc/ultrapenguin-release",  "/etc/UnitedLinux-release",
+		"/etc/va-release",            "/etc/yellowdog-release"
+	};
+
+	const char lsb_distrib_id[]      = "DISTRIB_ID=";
+	const char lsb_distrib_release[] = "DISTRIB_RELEASE=";
+
+	for (i = 0; i < countof(releases); i++)
+	{
+		file = fopen(releases[i], "r");
+		if (!file)
+		{
+			continue;
+		}
+
+		/* read release file into buffer */
+		fseek(file, 0, SEEK_END);
+		len = min(ftell(file), len);
+		rewind(file);
+		buf[len] = '\0';
+		if (fread(buf, 1, len, file) != len)
+		{
+			DBG1(DBG_IMC, "failed to read file \"%s\"", releases[i]);
+			fclose(file);
+			return FALSE;
+		}
+		fclose(file);
+
+		DBG1(DBG_IMC, "processing \"%s\" file", releases[i]);
+
+		switch (i)
+		{
+			case RELEASE_LSB:
+			{
+				/* Determine Distribution ID */				
+				pos = strstr(buf, lsb_distrib_id);
+				if (!pos)
+				{
+					DBG1(DBG_IMC, "failed to find begin of DISTRIB_ID field");
+					return FALSE;
+				}
+				pos += strlen(lsb_distrib_id);
+
+				os_name.ptr = pos;
+
+				pos = strchr(pos, '\n');
+				if (!pos)
+				{
+					DBG1(DBG_IMC, "failed to find end of DISTRIB_ID field");
+					return FALSE;
+			 	}
+
+				os_name.len = pos - os_name.ptr;
+
+				/* Determine Distribution Release */				
+				pos = strstr(buf, lsb_distrib_release);
+				if (!pos)
+				{
+					DBG1(DBG_IMC, "failed to find begin of DISTRIB_RELEASE field");
+					return FALSE;
+				}
+				pos += strlen(lsb_distrib_release);
+
+				os_version.ptr = pos;
+
+				pos = strchr(pos, '\n');
+				if (!pos)
+				{
+					DBG1(DBG_IMC, "failed to find end of DISTRIB_RELEASE field");
+					return FALSE;
+			 	}
+
+				os_version.len = pos - os_version.ptr;
+
+				break;
+			}			 
+			case RELEASE_DEBIAN:
+			{
+				char str_debian[] = "Debian";
+
+				os_name = chunk_create(str_debian, strlen(str_debian));
+				os_version.ptr = buf;
+
+				pos = strchr(buf, '\n');
+				if (!pos)
+				{
+					DBG1(DBG_PTS, "failed to find end of release string");
+					return FALSE;
+				}
+
+				os_version.len = pos - os_version.ptr;
+
+				break;
+			}
+			default:
+			{
+				const char str_release[] = " release ";
+
+				os_name.ptr = buf;
+
+				pos = strstr(buf, str_release);
+				if (!pos)
+				{
+					DBG1(DBG_IMC, "failed to find release keyword");
+					return FALSE;
+				}
+
+				os_name.len = pos - os_name.ptr;
+				pos += strlen(str_release);
+				os_version.ptr = pos;
+
+				pos = strchr(pos, '\n');
+				if (!pos)
+				{
+					DBG1(DBG_IMC, "failed to find end of release string");
+					return FALSE;
+			 	}
+
+				os_version.len = pos - os_version.ptr;
+
+				break;
+			}
+		}
+		break;
+	}
+
+	if (!os_name.ptr)
+	{
+		DBG1(DBG_IMC, "no distribution release file found");
+		return FALSE;
+	}
+
+	if (uname(&uninfo) < 0)
+	{
+		DBG1(DBG_IMC, "could not retrieve machine architecture");
+		return FALSE;
+	}
+
+	/* copy OS name */
+	*name = chunk_clone(os_name);
+
+	/* copy OS version and machine architecture */
+	*version = chunk_alloc(os_version.len + 1 + strlen(uninfo.machine));
+	pos = version->ptr;
+	memcpy(pos, os_version.ptr, os_version.len);
+	pos += os_version.len;
+	*pos++ = ' ';
+	memcpy(pos, uninfo.machine, strlen(uninfo.machine));
+
+	return TRUE;	
+}
+
+/**
+ * See header
+ */
+os_info_t *os_info_create(void)
+{
+	private_os_info_t *this;
+	chunk_t name, version;
+
+	/* As an opton OS name and OS version can be configured manually */
+	name.ptr = lib->settings->get_str(lib->settings, 
+									  "libimcv.os_info.name", NULL);
+	version.ptr = lib->settings->get_str(lib->settings, 
+									  "libimcv.os_info.version", NULL);
+	if (name.ptr && version.ptr)
+	{
+		name.len = strlen(name.ptr);
+		name = chunk_clone(name);
+
+		version.len = strlen(version.ptr);
+		version = chunk_clone(version);	
+	}
+	else
+	{
+		if (!extract_platform_info(&name, &version))
+		{
+			return NULL;
+		}
+	}
+	DBG1(DBG_IMC, "operating system name is '%.*s'",
+				   name.len, name.ptr);
+	DBG1(DBG_IMC, "operating system version is '%.*s'",
+				   version.len, version.ptr);
+
+	INIT(this,
+		.public = {
+			.get_name = _get_name,
+			.get_version = _get_version,
+			.create_package_enumerator = _create_package_enumerator,
+			.destroy = _destroy,
+		},
+		.name = name,
+		.version = version,
+	);
+
+	return &this->public;
+}
diff --git a/src/libimcv/os_info/os_info.h b/src/libimcv/os_info/os_info.h
new file mode 100644
index 000000000..78d0509f4
--- /dev/null
+++ b/src/libimcv/os_info/os_info.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2012 Andreas Steffen
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup os_info os_info
+ * @{ @ingroup libimcv
+ */
+
+#ifndef OS_INFO_H_
+#define OS_INFO_H_
+
+typedef struct os_info_t os_info_t;
+
+#include <library.h>
+
+/**
+ * Interface for the Operating System (OS) information module
+ */
+struct os_info_t {
+
+	/**
+	 * Get the OS product name or distribution
+	 *
+	 * @return					OS name
+	 */
+	chunk_t (*get_name)(os_info_t *this);
+
+	/**
+	 * Get the OS version or release
+	 *
+	 * @return					OS version
+	 */
+	chunk_t (*get_version)(os_info_t *this);
+
+	/**
+	 * Enumerates over all installed packages
+	 *
+	 * @return				return package enumerator
+	 */
+	enumerator_t* (*create_package_enumerator)(os_info_t *this);
+
+	/**
+	 * Destroys an os_info_t object.
+	 */
+	void (*destroy)(os_info_t *this);
+};
+
+/**
+ * Create an os_info_t object
+ */
+os_info_t* os_info_create(void);
+
+#endif /** OS_INFO_H_ @}*/