From patchwork Wed Sep 21 16:27:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Privoznik X-Patchwork-Id: 9343863 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id ACA88601C2 for ; Wed, 21 Sep 2016 16:28:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A206D2A7F5 for ; Wed, 21 Sep 2016 16:28:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 96EED2A7F7; Wed, 21 Sep 2016 16:28:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2DBB92A7F5 for ; Wed, 21 Sep 2016 16:28:28 +0000 (UTC) Received: from localhost ([::1]:43754 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bmkNn-0003q9-7i for patchwork-qemu-devel@patchwork.kernel.org; Wed, 21 Sep 2016 12:28:27 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59207) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bmkN8-0003h0-Dp for qemu-devel@nongnu.org; Wed, 21 Sep 2016 12:27:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bmkN6-00018y-Gz for qemu-devel@nongnu.org; Wed, 21 Sep 2016 12:27:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48482) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bmkN6-00018t-BN for qemu-devel@nongnu.org; Wed, 21 Sep 2016 12:27:44 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E0C38C05A2A1; Wed, 21 Sep 2016 16:27:43 +0000 (UTC) Received: from lisa.brq.redhat.com (dhcp129-142.brq.redhat.com [10.34.129.142]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u8LGRe36030743; Wed, 21 Sep 2016 12:27:42 -0400 From: Michal Privoznik To: qemu-devel@nongnu.org Date: Wed, 21 Sep 2016 18:27:34 +0200 Message-Id: In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Wed, 21 Sep 2016 16:27:43 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 1/2] util: Introduce qemu_get_pid_name X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, armbru@redhat.com, peter.maydell@linaro.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This is a small helper that tries to fetch binary name for given PID. Signed-off-by: Michal Privoznik --- include/qemu/osdep.h | 10 ++++++++++ util/oslib-posix.c | 27 +++++++++++++++++++++++++++ util/oslib-win32.c | 7 +++++++ 3 files changed, 44 insertions(+) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index 9e9fa61..384bfe2 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -388,6 +388,16 @@ void os_mem_prealloc(int fd, char *area, size_t sz, Error **errp); int qemu_read_password(char *buf, int buf_size); /** + * qemu_get_pid_name: + * @pid: pid of a process + * + * For given @pid fetch its name. Caller is responsible for + * freeing the string when no longer needed. + * Returns allocated string on success, NULL on failure. + */ +char *qemu_get_pid_name(pid_t pid); + +/** * qemu_fork: * * A version of fork that avoids signal handler race diff --git a/util/oslib-posix.c b/util/oslib-posix.c index f2d4e9e..8c1e8d6 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -46,6 +46,7 @@ #ifdef __FreeBSD__ #include +#include #endif #include "qemu/mmap-alloc.h" @@ -430,6 +431,32 @@ int qemu_read_password(char *buf, int buf_size) } +char *qemu_get_pid_name(pid_t pid) +{ + char *name = NULL; + +#if defined(__FreeBSD__) + /* BSDs don't have /proc, but they provide a nice substitute */ + struct kinfo_proc *proc = kinfo_getproc(pid); + + if (proc) { + name = g_strdup(proc->ki_comm); + free(proc); + } +#else + /* Assume a system with reasonable procfs */ + char *pid_path; + size_t len; + + pid_path = g_strdup_printf("/proc/%d/cmdline", pid); + g_file_get_contents(pid_path, &name, &len, NULL); + g_free(pid_path); +#endif + + return name; +} + + pid_t qemu_fork(Error **errp) { sigset_t oldmask, newmask; diff --git a/util/oslib-win32.c b/util/oslib-win32.c index 4c1dcf1..d09863c 100644 --- a/util/oslib-win32.c +++ b/util/oslib-win32.c @@ -575,6 +575,13 @@ int qemu_read_password(char *buf, int buf_size) } +char *qemu_get_pid_name(pid_t pid) +{ + /* XXX Implement me */ + abort(); +} + + pid_t qemu_fork(Error **errp) { errno = ENOSYS;