From owner-svn-src-all@FreeBSD.ORG Sun Feb 26 14:25:48 2012 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E6FF71065674; Sun, 26 Feb 2012 14:25:48 +0000 (UTC) (envelope-from trociny@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id BCB738FC14; Sun, 26 Feb 2012 14:25:48 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q1QEPm32069105; Sun, 26 Feb 2012 14:25:48 GMT (envelope-from trociny@svn.freebsd.org) Received: (from trociny@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id q1QEPm9g069102; Sun, 26 Feb 2012 14:25:48 GMT (envelope-from trociny@svn.freebsd.org) Message-Id: <201202261425.q1QEPm9g069102@svn.freebsd.org> From: Mikolaj Golub Date: Sun, 26 Feb 2012 14:25:48 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r232181 - in head/sys: kern sys X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Feb 2012 14:25:49 -0000 Author: trociny Date: Sun Feb 26 14:25:48 2012 New Revision: 232181 URL: http://svn.freebsd.org/changeset/base/232181 Log: Add sysctl to retrieve or set umask of another process. Submitted by: Dmitry Banschikov Discussed with: kib, rwatson Reviewed by: kib MFC after: 2 weeks Modified: head/sys/kern/kern_proc.c head/sys/sys/sysctl.h Modified: head/sys/kern/kern_proc.c ============================================================================== --- head/sys/kern/kern_proc.c Sun Feb 26 13:57:24 2012 (r232180) +++ head/sys/kern/kern_proc.c Sun Feb 26 14:25:48 2012 (r232181) @@ -60,6 +60,7 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include #include #include #include @@ -2471,6 +2472,49 @@ sysctl_kern_proc_ps_strings(SYSCTL_HANDL return (error); } +/* + * This sysctl allows a process to retrieve or/and set umask of + * another process. + */ +static int +sysctl_kern_proc_umask(SYSCTL_HANDLER_ARGS) +{ + int *name = (int *)arg1; + u_int namelen = arg2; + struct proc *p; + int error; + u_short fd_cmask; + + if (namelen != 1) + return (EINVAL); + + if (req->newptr != NULL && req->newlen != sizeof(fd_cmask)) + return (EINVAL); + + error = pget((pid_t)name[0], PGET_WANTREAD, &p); + if (error != 0) + return (error); + + FILEDESC_SLOCK(p->p_fd); + fd_cmask = p->p_fd->fd_cmask; + FILEDESC_SUNLOCK(p->p_fd); + error = SYSCTL_OUT(req, &fd_cmask, sizeof(fd_cmask)); + if (error != 0) + goto errout; + + if (req->newptr != NULL) { + error = SYSCTL_IN(req, &fd_cmask, sizeof(fd_cmask)); + if (error == 0) { + FILEDESC_XLOCK(p->p_fd); + p->p_fd->fd_cmask = fd_cmask & ALLPERMS; + FILEDESC_XUNLOCK(p->p_fd); + } + } +errout: + PRELE(p); + return (error); +} + SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table"); SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT| @@ -2572,3 +2616,7 @@ static SYSCTL_NODE(_kern_proc, KERN_PROC static SYSCTL_NODE(_kern_proc, KERN_PROC_PS_STRINGS, ps_strings, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc_ps_strings, "Process ps_strings location"); + +static SYSCTL_NODE(_kern_proc, KERN_PROC_UMASK, umask, CTLFLAG_RW | + CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_umask, + "Process umask"); Modified: head/sys/sys/sysctl.h ============================================================================== --- head/sys/sys/sysctl.h Sun Feb 26 13:57:24 2012 (r232180) +++ head/sys/sys/sysctl.h Sun Feb 26 14:25:48 2012 (r232181) @@ -563,6 +563,7 @@ SYSCTL_ALLOWED_TYPES(UINT64, uint64_t *a #define KERN_PROC_AUXV 36 /* get ELF auxiliary vector */ #define KERN_PROC_RLIMIT 37 /* process resource limits */ #define KERN_PROC_PS_STRINGS 38 /* get ps_strings location */ +#define KERN_PROC_UMASK 39 /* process umask */ /* * KERN_IPC identifiers