Date: Mon, 15 May 2017 19:32:26 +0000 (UTC) From: "Stephen J. Kiernan" <stevek@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r318314 - head/lib/libc/sys Message-ID: <201705151932.v4FJWQ16092469@repo.freebsd.org>
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Author: stevek Date: Mon May 15 19:32:26 2017 New Revision: 318314 URL: https://svnweb.freebsd.org/changeset/base/318314 Log: Add information to open(2) man page about the O_VERIFY flag. Reviewed by: bjk wblock Approved by: sjg (mentor) Obtained from: Juniper Networks, Inc. Modified: head/lib/libc/sys/open.2 Modified: head/lib/libc/sys/open.2 ============================================================================== --- head/lib/libc/sys/open.2 Mon May 15 18:48:58 2017 (r318313) +++ head/lib/libc/sys/open.2 Mon May 15 19:32:26 2017 (r318314) @@ -141,6 +141,7 @@ O_NOCTTY ignored O_TTY_INIT ignored O_DIRECTORY error if file is not a directory O_CLOEXEC set FD_CLOEXEC upon open +O_VERIFY verify the contents of the file .Ed .Pp Opening a file with @@ -259,6 +260,15 @@ may be used to set .Dv FD_CLOEXEC flag for the newly returned file descriptor. .Pp +.Dv O_VERIFY +may be used to indicate to the kernel that the contents of the file should +be verified before allowing the open to proceed. +The details of what +.Dq verified +means is implementation specific. +The run-time linker (rtld) uses this flag to ensure shared objects have +been verified before operating on them. +.Pp If successful, .Fn open returns a non-negative integer, termed a file descriptor.
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