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authorMichael Kerrisk <mtk.manpages@gmail.com>2008-10-07 11:24:50 +0200
committerMichael Kerrisk <mtk.manpages@gmail.com>2008-10-07 11:24:50 +0200
commit0c847271ff722856e14d4e2e84e3ba639195b134 (patch)
tree968e793ee684afd902d49062ab314ebc6ea01977 /Changes.old
parent9ae5549831dff58ec6692e46ad26dbb936cc6242 (diff)
Start of man-pages-3.12: updating Changes and Changes.old
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@@ -15029,3 +15029,416 @@ services.5
mtk
Remove crufty text about use of comma instead of slash to separate
port and protocol.
+
+
+==================== Changes in man-pages-3.11 ====================
+
+Released: 2008-10-07, Munich
+
+
+Contributors
+------------
+
+The following people contributed notes, ideas, or patches that have
+been incorporated in changes in this release:
+
+André Goddard Rosa <andre.goddard@gmail.com>
+Eugene V. Lyubimkin <jackyf.devel@gmail.com>
+Gergely Soos <sogerc1@gmail.com>
+Kirill A. Shutemov <kirill@shutemov.name>
+Marko Kreen <markokr@gmail.com>
+Maxin B. John <maxin.john@ap.sony.com>
+Maxin John <maxin.john@gmail.com>
+Michael Kerrisk <mtk.manpages@gmail.com>
+Nicolas François <nicolas.francois@centraliens.net>
+Pavel Heimlich <tropikhajma@seznam.cz>
+Ricardo Catalinas Jiménez <jimenezrick@gmail.com>
+Sam Varshavchik <mrsam@courier-mta.com>
+
+Apologies if I missed anyone!
+
+
+New and rewritten pages
+-----------------------
+
+umount.2
+ Michael Kerrisk
+ Create a new page for umount() and umount2() by extracting
+ existing material from mount.2 page.
+
+
+New and changed links
+---------------------
+
+umount2.2
+ Michael Kerrisk
+ umount2.2: Change link to point to new umount.2
+
+ The umount2() material migrated from mount.2 to umount.2
+
+
+Changes to individual pages
+---------------------------
+
+execve.2
+ Michael Kerrisk
+ execve.2: _SC_ARG_MAX is no longer necessarily constant
+
+ POSIX.1-2001 says that the values returned by sysconf()
+ are constant for the life of the process.
+ But the fact that, since Linux 2.6.23, ARG_MAX is settable
+ via RLIMIT_STACK means _SC_ARG_MAX is no longer constant,
+ since it can change at each execve().
+
+ Michael Kerrisk
+ execve.2: Linux now imposes a floor on the ARG_MAX limit
+
+ Starting with Linux 2.6.23, the ARG_MAX limit became settable via
+ (1/4 of) RLIMIT_STACK. This broke ABI compatibility if RLIMIT_STACK
+ was set such that ARG_MAX was < 32 pages. Document the fact that
+ since 2.6.25 Linux imposes a floor on ARG_MAX, so that the old limit
+ of 32 pages is guaranteed.
+
+ For some background on the changes to ARG_MAX in kernels 2.6.23 and
+ 2.6.25, see:
+ http://sourceware.org/bugzilla/show_bug.cgi?id=5786
+ http://bugzilla.kernel.org/show_bug.cgi?id=10095
+ http://thread.gmane.org/gmane.linux.kernel/646709/focus=648101,
+ checked into 2.6.25 as commit a64e715fc74b1a7dcc5944f848acc38b2c4d4ee2.
+
+ Also some reordering/rewording of the discussion of ARG_MAX.
+
+fallocate.2
+ Michael Kerrisk
+ fallocate.2: Note lack of glibc wrapper; caller must use syscall(2)
+
+ Glibc doesn't (and quite probably won't) include a wrapper for this
+ system call. Therefore, point out that potential callers will need
+ to use syscall(2), and rewrite the RETURN VALUE text to show things
+ as they would be if syscall() is used.
+
+ Michael Kerrisk
+ fallocate: Refer reader to posix_fallocate(3) for portable interface
+
+ Add a para to start of page that points out that this is the
+ low-level, Linux-specific API, and point the reader to posix_fallocate(3)
+ for the portable API.
+
+getdents.2
+readdir.3
+ Michael Kerrisk
+ getdents.2, readdir.3: d_type is currently only supported on ext[234]
+
+ As at kernel 2.6.27, only ext[234] support d_type.
+ On other file systems, d_type is always set to DT_UNKNOWN (0).
+
+getdents.2
+ Michael Kerrisk
+ getdents.2: Add an example program
+ Michael Kerrisk
+ getdents.2: comment out linux_dirent fields with varying location
+
+ The location of the fields faster d_name varies according to
+ the size of d_name. We can't properly declare them in C;
+ therefore, put those fields inside a comment.
+
+ Michael Kerrisk
+ getdents.2: The DT_* constants are defined in <dirent.h>
+
+ Michael Kerrisk
+ getdents.2: remove header files from SYNOPSIS
+
+ None of the header files provides what is needed.
+ Calls are made via syscall(2).
+
+ Michael Kerrisk
+ getdents.2: The programmer must define the linux_dirent structure
+
+ Point out that this structure is not defined in glibc headers.
+
+ Michael Kerrisk
+ getdents.2: s/dirent/linux_dirent/
+
+ The structure isn't currently defined in glibc headers, and the kernel
+ name of the structure is 'linux_dirent' (as was already used in some,
+ but not all, places in this page).
+
+getrlimit.2
+ Michael Kerrisk
+ getrlimit.2: Reword/relocate discussion of BSD's historical RLIMIT_OFILE
+
+ The old sentence sat on its own in an odd place, and anyway the
+ modern BSDs use the name RLIMIT_NOFILE.
+
+ Michael Kerrisk
+ getrlimit.2: refer to execve(2) for RLIMIT_STACK's effect on ARG_MAX
+
+ Refer the reader to new text in execve(2) that describes how
+ (since Linux 2.6.23) RLIMIT_STACK determines the value of ARG_MAX.
+
+getrusage.2
+ Michael Kerrisk
+ getrusage.2: rusage measures are preserved across execve(2)
+
+mlock.2
+ Maxin John
+ mlock.2: add EAGAIN error.
+
+move_pages.2
+ Nicolas François
+ move_pages.2: Make a detail of EPERM error more precise
+
+mount.2
+ Michael Kerrisk
+ mount.2: Add description of namespace
+
+ Describe per-process namespaces, including discussion
+ of clone() and unshare CLONE_NEWNS, and /proc/PID/mounts.
+
+ Michael Kerrisk
+ mount.2: List a few other file systems that we may see in /proc/filesystems
+
+ Add some modern file systems to that list (xfs, jfs, ext3, reiserfs).
+
+ Michael Kerrisk
+ mount.2: Document MS_SILENT (and MS_VERBOSE)
+
+mount.2
+umount.2
+ Michael Kerrisk
+ mount.2, umount.2: split umoun*() out into a separate page
+
+ The length of this page means that it's becoming difficult to parse
+ which info is specific to mount() versus umount()/umount2(), so split
+ the umount material out into its own page.
+
+pause.2
+ Michael Kerrisk
+ pause.2: remove mention of words "library function"
+
+ This really is a system call.
+
+readdir.2
+ Michael Kerrisk
+ readdir.2: The programmer must declare the old_linux_dirent structure
+
+ Glibc does not provide a definition of this structure.
+
+ Michael Kerrisk
+ readdir.2: s/dirent/old_linux_dirent/
+
+ Nowadays, this is the name of the structure in the kernel sources.
+
+ Michael Kerrisk
+ readdir.2: remove words "which may change"
+
+ These words are slightly bogus: although the interface is obsolete,
+ for ABI-compatibility reasons, the kernel folk should never be changing
+ this interface.
+
+ Michael Kerrisk
+ readdir.2: remove header files from SYNOPSIS
+
+ glibc doesn't provide any support for readdir(2),
+ so remove these header files (which otherwise suggest
+ that glibc does provide the required pieces).
+
+recv.2
+ Nicolas François
+ recv.2: Move kernel version number to first mention to MSG_ERRQUEUE.
+
+semop.2
+ Kirill A. Shutemov
+ semop.2: fix typo in example
+
+ (The '&' before sop in the semop() call is unneeded.)
+
+send.2
+ Michael Kerrisk
+ send.2: make kernel version for MSG_CONFIRM more precise
+
+ s/2.3+ only/Since Linux 2.3.15/
+
+sigaction.2
+ Michael Kerrisk
+ sigaction.2: refer reader to signal(7) for an overview of signals
+ sigaction.2: explain semantics of signal disposition during fork() and execve()
+ sigaction.2: refer to signal(7) for more details on signal mask.
+
+sigaltstack.2
+ Michael Kerrisk
+ sigaltstack.2: explain inheritance of alternate signal stack across fork(2)
+
+sigwaitinfo.2
+ Michael Kerrisk
+ sigwaitinfo.2: distinguish per-thread and process-wide signals
+
+ A sentence clarifying that pending signal set is union of
+ per-thread and process-wide pending signal sets.
+
+ Michael Kerrisk
+ sigwaitinfo.2: these interfaces have per-thread semantics
+
+ The page was previously fuzzy about whether the these interfaces
+ have process-wide or per-thread semantics. (E.g., now the
+ page states that the calling *thread* (not process) is suspended
+ until the signal is delivered.)
+
+sigpending.2
+ Michael Kerrisk
+ sigpending.2: explain effect of fork() and execve() for pending signal set
+
+ Michael Kerrisk
+ sigpending.2: explain how thread's pending signal set is defined
+
+ The pending set is the union of per-thread pending signals and process-wide
+ pending signals.
+
+sigprocmask.2
+ Michael Kerrisk
+ sigprocmask.2: explain effects of fork() and execve() for signal mask
+
+splice.2
+ Michael Kerrisk
+ splice.2: note that SPLICE_F_MOVE is a no-op since kernel 2.6.21
+
+syscall.2
+ Michael Kerrisk
+ syscall.2: Add more detail about wrapper functions
+
+ Add a few more details about work generally done by wrapper
+ functions. Note that syscall(2) performs the same steps.
+
+tkill.2
+ Michael Kerrisk
+ tkill.2: EINVAL error can also occur for invalid TGID
+
+ The EINVAL error on an invalid TGID for tgkill() was
+ not documented; this change documents it.
+
+utimensat.2
+ Michael Kerrisk
+ utimensat.2: POSIX.1-2008 revision will likely affect FTMs for futimens()
+
+ Make it clear that the POSIX.1 revision that is likely
+ to affect the feature test macro requirements for futimens() is
+ POSIX.1-2008.
+
+ Nicolas François
+ utimensat.2: Make various wordings a little more precise.
+
+ The times argument point to *an array of* structures, and the
+ man-page should say that consistently.
+
+wait4.2
+ Michael Kerrisk
+ wait4.2: wait3() is a library function layered on wait4().
+
+ On Linux wait3() is a library function implemented on top of wait4().
+ (Knowing this is useful when using strace(2), for example.)
+
+atan2.3
+ Nicolas François
+ atan2.3: Fix error in description of range or return value
+
+ In recent changes to the man page, mtk accidentally changed
+ the description of the return value range to -pi/2..pi/2;
+ the correct range is -pi..pi.
+
+cmsg.3
+ Nicolas François
+ cmsg.3: Add parentheses after macro names.
+
+ctime.3
+ Michael Kerrisk
+ ctime.3: clarify mktime()'s use of tm_isdst
+
+ Describe use of tm_isdst for input to mktime();
+ explain how mktime() modifies this field.
+ (This field is left unchanged in case of error.)
+
+ http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=500178
+
+ Michael Kerrisk
+ Clarify wording for ctime_r() and asctime_r() to indicate that
+ the buffer must be at least 26 *bytes*.
+
+ Michael Kerrisk
+ ctime.3: minor rewording of mktime() description.
+
+floor.3
+ Nicolas François
+ floor.3: Fix error in description: s/smallest/largest/
+
+hsearch.3
+ André Goddard Rosa
+ hsearch.3: Call hdestroy() after using hash table created by hcreate(), for the sake of completeness
+
+mq_getattr.3
+ Michael Kerrisk
+ mg_getattr.3: mq_getattr() and mq_setattr() are layered on mq_getsetattr(2)
+
+ mq_getattr() and mq_setattr() are library functions layered on
+ top of the mq_getsetattr(2) system call.
+ (This is useful info for users of strace(1).)
+
+mq_receive.3
+ Michael Kerrisk
+ mq_receive.3: mq_send() is a library function layered on mq_timedreceive() syscall
+
+ This info is useful for users of strace(1).
+
+mq_send.3
+ Michael Kerrisk
+ mq_send.3: mq_send() is a library function layered on mq_timedsend() syscall
+
+ This info is useful for users of strace(1).
+
+nextafter.3
+ Nicolas François
+ nextafter.3: Make description more precise: s/next/largest/
+
+readdir.3
+ Michael Kerrisk
+ readdir.3: SEE ALSO: add getdents(2)
+
+ Because readdir() is implemented on top of getdents(2).
+
+realpath.3
+ Michael Kerrisk
+ realpath.3: clarify that returned pathname is NULL terminated
+
+ Also clarify that null-byte is included in PATH_MAX limit.
+
+proc.5
+ Michael Kerrisk
+ proc.5: rewrite and simplify description of /proc/mounts
+
+ Most of the relevant discussion is now under /proc/PID/mounts;
+ all that needs to be here is a mention of the pre-2.4.19
+ system-wide namespace situation, and a reference to the
+ discussion under /proc/PID/mounts.
+
+ Michael Kerrisk
+ proc.5: Add description of /proc/PID/mounts
+
+ Largely cribbed from existing /proc/mounts discussion, which is
+ about to be rewritten.
+
+mq_overview.7
+ Michael Kerrisk
+ mq_overview.7: add mq_notify() to list of lib. functions and syscalls in MQ API
+
+signal.7
+ Michael Kerrisk
+ signal.7: improve description in NAME section
+ signal.7: Add mention of sigaltstack(2).
+ signal.7: Describe syscalls that synchronously wait for a signal,
+ signal.7: Give overview of syscalls that block until a signal is caught
+ signal.7: Add overview of interfaces for sending signals.
+
+ Michael Kerrisk
+ signal.7: describe semantics w.r.t. fork() and execve()
+
+ Include text describing semantics of fork() and execve() for
+ signal dispositions, signal mask, and pending signal set.