mirror of https://github.com/mkerrisk/man-pages
Changes: Ready for 4.03
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk
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307
Changes
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@ -10,26 +10,321 @@ The following people contributed patches/fixes or (noted in brackets
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in the changelog below) reports, notes, and ideas that have been
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incorporated in changes in this release:
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Alexander Shishkin <alexander.shishkin@linux.intel.com>
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Alexei Starovoitov <ast@plumgrid.com>
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Andy Lutomirski <luto@kernel.org>
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Arto Bendiken <arto@bendiken.net>
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Carlos O'Donell <carlos@redhat.com>
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Casper Ti. Vector <caspervector@gmail.com>
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Daniel Borkmann <daniel@iogearbox.net>
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David Drysdale <drysdale@google.com>
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Eric B Munson <emunson@akamai.com>
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Florian Weimer <fweimer@redhat.com>
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Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
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Heinrich Schuchardt <xypron.glpk@gmx.de>
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Ingo Molnar <mingo@kernel.org>
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Jakub Wilk <jwilk@jwilk.net>
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Johannes Stüttgen <Johannes.Stuettgen@gmail.com>
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Jonathan Wakely <jwakely@redhat.com>
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Jonny Grant <jg@jguk.org>
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Kees Cook <keescook@chromium.org>
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Maria Guseva <m.guseva@samsung.com>
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Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
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Meikun Wang <alikewmk@gmail.com>
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Michael Kerrisk <mtk.manpages@gmail.com>
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Michal Hocko <mhocko@suse.com>
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Mike Frysinger <vapier@gentoo.org>
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Namhyung Kim <namhyung@gmail.com>
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Nikola Forró <nforro@redhat.com>
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Olivier TARTROU <olivier.tartrou@gmail.com>
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Peter Hurley <peter@hurleysoftware.com>
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Peter Zijlstra (Intel) <peterz@infradead.org>
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Ross Zwisler <ross.zwisler@linux.intel.com>
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Serge Hallyn <serge.hallyn@canonical.com>
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Silvan Jegen <s.jegen@gmail.com>
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Stefan Tauner <tauner@technikum-wien.at>
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Steven Rostedt <rostedt@goodmis.org>
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Tobias Stoeckmann <tobias@stoeckmann.org>
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Tycho Andersen <tycho.andersen@canonical.com>
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Ville Skyttä <ville.skytta@iki.fi>
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Vince Weaver <vincent.weaver@maine.edu>
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Zeng Linggang <zenglg.jy@cn.fujitsu.com>
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Apologies if I missed anyone!
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New and rewritten pages
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-----------------------
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Newly documented interfaces in existing pages
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---------------------------------------------
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perf_event_open.2
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Vince Weaver
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4.1 adds AUX sample support
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Vince Weaver
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4.1 data_offset and data_size fields
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Vince Weaver [Alexander Shishkin]
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Document aux_{head,tail,offset,size} support
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Vince Weaver
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4.0 update rdpmc documentation
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Vince Weaver
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4.1 adds PERF_RECORD_ITRACE_START
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Vince Weaver
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Document 4.1 clockid support
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Vince Weaver [Steven Rostedt, Masami Hiramatsu]
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4.1 PERF_EVENT_IOC_SET_BPF support
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Vince Weaver
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4.1 adds AUX_FLAG_OVERWRITE support
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Vince Weaver
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4.1 PERF_SAMPLE_BRANCH_CALL_STACK
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Vince Weaver
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4.1 adds aux_watermark
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Vince Weaver
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Add possibility of EBUSY error
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prctl.2
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Andy Lutomirski [Kees Cook, Serge Hallyn]
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Document operations for ambient capabilities
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Michael Kerrisk
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Rework PR_CAP_AMBIENT text
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Note that arg4 and arg5 must be zero for CAP_AMBIENT
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RETURN VALUE: Add PR_CAP_AMBIENT + PR_CAP_AMBIENT_IS_SET case
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ERRORS: document PR_CAP_AMBIENT error cases
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__ppc_set_ppr_med.3
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Gabriel F. T. Gomes
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Document PPC functions providing access to PPR
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GNU C Library commit 1747fcda4902a3b46183d93fb16ed9b436b2608b
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extends the priorities that can be set to the Program Priority
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Register (PPR), with the functions: __ppc_set_ppr_very_low(3)
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and __ppc_set_ppr_med_high(3).
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capabilities.7
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Andy Lutomirski [Kees Cook, Serge Hallyn]
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Document ambient capabilities
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Michael Kerrisk
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Various additions and reworkings for ambient capability text
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New and changed links
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---------------------
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__ppc_set_ppr_med_high.3
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Gabriel F. T. Gomes
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New link to __ppc_set_ppr_med.3
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Global changes
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--------------
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__ppc_set_ppr_very_low.3
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Gabriel F. T. Gomes
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New link to __ppc_set_ppr_med.3
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Changes to individual pages
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---------------------------
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mremap.2
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Eric B Munson [Michal Hocko]
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Add note about mremap() with locked areas
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When mremap() is used to move or expand a mapping that is locked
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with mlock() or equivalent it will attempt to populate the new
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area. However, like mmap(MAP_LOCKED), mremap() will not fail if
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the area cannot be populated. Also like mmap(MAP_LOCKED) this
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might come as a surprise to users and should be noted.
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open.2
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Michael Kerrisk [David Drysdale]
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Remove accidental mention of O_TTY_INIT
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An earlier edit mentioned O_TTY_INIT as a file creation flag.
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That's true, according POSIX, but Linux does not implement
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this flag, so remove mention of it.
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pipe.2
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Michael Kerrisk
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SEE ALSO: add splice(2)
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prctl.2
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Michael Kerrisk
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Reorder options alphabetically
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Employ a pseudo-alphabetical order, ordering options after removal
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of any "PR_", "PR_SET_", or "PR_GET" prefix.
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Michael Kerrisk
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Fix alphabetical misplacements in ERRORS
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ptrace.2
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Tycho Andersen
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Document PTRACE_O_SUSPEND_SECCOMP flag
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Michael Kerrisk
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Document /proc/sys/kernel/yama/ptrace_scope
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Michael Kerrisk
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Note that PTRACE_ATTACH cannot be applied to nondumpable processes
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Michael Kerrisk
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SEE ALSO: add prctl(2)
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reboot.2
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Casper Ti. Vector
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1-argument reboot() is also provided by alternative libc
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seccomp.2
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Michael Kerrisk
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Describe use of 'instruction_pointer' data field
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Michael Kerrisk [Kees Cook]
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Note why all filters in a set are executed even after SECCOMP_RET_KILL
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signalfd.2
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Michael Kerrisk
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Describe semantics with respect to SCM_RIGHTS
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syscalls.2
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Michael Kerrisk
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Add mlock(2)
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Michael Kerrisk
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Add userfaultfd()
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daemon.3
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Michael Kerrisk [Johannes Stüttgen]
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Note that daemon() is buggy with respect to controlling tty acquisition
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dirfd.3
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Jonathan Wakely
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Remove outdated NOTES
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As stated in the SYNOPSIS, since glibc 2.10 this function is also
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declared by the relevant X/Open and POSIX macros.
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dlopen.3
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Michael Kerrisk
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Make it more explicit that LD_BIND_NOW overrides RTLD_LAZY
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Michael Kerrisk [Florian Weimer]
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Correct the pathname used in EXAMPLE
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Quoting Florian:
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This does not work because libm.so can be a linker script:
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handle = dlopen("libm.so", RTLD_LAZY);
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The proper way to do this is to include <gnu/lib-names.h>
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and use LIBM_SO.
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See https://bugzilla.kernel.org/show_bug.cgi?id=108821
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Michael Kerrisk
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Include a shell session showing build/run in EXAMPLE
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Michael Kerrisk
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Change arguments to main() to "void" in EXAMPLE
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fgetgrent.3
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Zeng Linggang
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ATTRIBUTES: Note function that is not thread-safe
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fgetpwent.3
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Zeng Linggang
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ATTRIBUTES: Note function that is not thread-safe
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getauxval.3
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Michael Kerrisk
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Add some details for AT_SECURE
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getspnam.3
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Zeng Linggang
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ATTRIBUTES: Note functions that are/aren't thread-safe
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mallinfo.3
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Zeng Linggang
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ATTRIBUTES: Note function that is not thread-safe
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mallopt.3
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Carlos O'Donell
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Document M_ARENA_TEST and M_ARENA_MAX
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posix_fallocate.3
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Michael Kerrisk
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Clarify text relating to MT-safety
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Carlos O'Donell
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Mention glibc emulation caveats
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termios.3
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Olivier TARTROU
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Add missing details on behaviour of PARMRK
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For a serial terminal, with a specific configuration, input bytes
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with value 0377 are passed to the program as two bytes, 0377 0377.
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tty_ioctl.4
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Michael Kerrisk [Peter Hurley]
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Note that TIOCTTYGSTRUCT went away in Linux 2.5.67
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core.5
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Ross Zwisler
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Add info about DAX coredump filtering flags
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Kernel 4.4 added two new core dump filtering flags,
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MMF_DUMP_DAX_PRIVATE and MMF_DUMP_DAX_SHARED.
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These flags allow us to explicitly filter DAX mappings.
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This is desirable because DAX mappings, like hugetlb
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mappings, have the potential to be very large.
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nsswitch.conf.5
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Nikola Forró
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Add list of files being read when "files" service is used
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This is not mentioned anywhere. Users can assume that the file
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being read is something like /etc/$DATABASE, but that's not
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always the case. It's better to explicitly specify which
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file is read for each respective database. The list of
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files was acquired from glibc source code.
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proc.5
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Heinrich Schuchardt [Michael Kerrisk]
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Add details for threads-max
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Add detail information for threads-max.
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The checks for minimum and maximum values exist since kernel 4.1.
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https://lkml.org/lkml/2015/3/15/96
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Heinrich Schuchardt
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/proc/sys: Describe whitespace characters
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Michael Kerrisk
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Document 'CapAmb' in /proc/PID/status
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Michael Kerrisk
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Add reference to ptrace(2) for /proc/sys/kernel/yama/ptrace_scope
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aio.7
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Michael Kerrisk [Meikun Wang]
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Add missing include file, <fcntl.h>, to example program
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mq_overview.7
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Michael Kerrisk [Arto Bendiken]
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Document QSIZE bug that appeared in 3.5 and was fixed in 4.2
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path_resolution.7
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Michael Kerrisk
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Clarify recursive resolution of symlinks and note limits
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pipe.7
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Michael Kerrisk
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SEE ALSO: add splice(2)
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rtld-audit.7
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Namhyung Kim
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Fix (typo) error in la_pltenter() description
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s/la_pltenter()/la_pltexit()/
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la_pltenter() is called regardless of the value of
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framesizep but la_pltexit() is called only if la_pltenter()
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returns with non-zero framesizep set. I spent long time to
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figure out why la_pltexit() is not called at all.
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signal.7
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Michael Kerrisk [Michael Hocko]
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Note async-signal-safe functions added by POSIX.1-2008 TC1
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tcp.7
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Daniel Borkmann [Michael Kerrisk]
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Improve paragraphs on tcp_ecn and add tcp_ecn_fallback bullet
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Improve description of tcp_ecn, fix the RFC number and it's
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not a boolean anymore since long time, and add a description
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for tcp_ecn_fallback.
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See also kernel doc under Documentation/networking/ip-sysctl.txt
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on tcp_ecn and tcp_ecn_fallback.
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ld.so.8
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Michael Kerrisk
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LD_POINTER_GUARD has been removed in glibc 2.23
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Michael Kerrisk
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Describe secure-execution mode
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Michael Kerrisk [Maria Guseva]
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Replace mentions of set-UID/set-GID programs with secure-execution mode
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Inspired by a patch from Maria Guseva.
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Maria Guseva [Silvan Jegen]
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LD_DEBUG is effective in secure-execution mode if /etc/suid-debug exists
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