path: root/templates/man7/pipe.7.pot

# SOME DESCRIPTIVE TITLE
# Copyright (C) YEAR Free Software Foundation, Inc.
# This file is distributed under the same license as the PACKAGE package.
# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
#
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: PACKAGE VERSION\n"
"POT-Creation-Date: 2024-06-01 06:08+0200\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n"
"Language: \n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"

#. type: TH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "pipe"
msgstr ""

#. type: TH
#: archlinux debian-unstable opensuse-tumbleweed
#, no-wrap
msgid "2024-05-02"
msgstr ""

#. type: TH
#: archlinux debian-unstable
#, no-wrap
msgid "Linux man-pages 6.8"
msgstr ""

#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "NAME"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "pipe - overview of pipes and FIFOs"
msgstr ""

#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "DESCRIPTION"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Pipes and FIFOs (also known as named pipes)  provide a unidirectional "
"interprocess communication channel.  A pipe has a I<read end> and a I<write "
"end>.  Data written to the write end of a pipe can be read from the read end "
"of the pipe."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"A pipe is created using B<pipe>(2), which creates a new pipe and returns two "
"file descriptors, one referring to the read end of the pipe, the other "
"referring to the write end.  Pipes can be used to create a communication "
"channel between related processes; see B<pipe>(2)  for an example."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"A FIFO (short for First In First Out) has a name within the filesystem "
"(created using B<mkfifo>(3)), and is opened using B<open>(2).  Any process "
"may open a FIFO, assuming the file permissions allow it.  The read end is "
"opened using the B<O_RDONLY> flag; the write end is opened using the "
"B<O_WRONLY> flag.  See B<fifo>(7)  for further details.  I<Note>: although "
"FIFOs have a pathname in the filesystem, I/O on FIFOs does not involve "
"operations on the underlying device (if there is one)."
msgstr ""

#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "I/O on pipes and FIFOs"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The only difference between pipes and FIFOs is the manner in which they are "
"created and opened.  Once these tasks have been accomplished, I/O on pipes "
"and FIFOs has exactly the same semantics."
msgstr ""

#. type: Plain text
#: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron
#: opensuse-tumbleweed
msgid ""
"If a process attempts to read from an empty pipe, then B<read>(2)  will "
"block until data is available.  If a process attempts to write to a full "
"pipe (see below), then B<write>(2)  blocks until sufficient data has been "
"read from the pipe to allow the write to complete."
msgstr ""

#. type: Plain text
#: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron
#: opensuse-tumbleweed
msgid ""
"Nonblocking I/O is possible by using the B<fcntl>(2)  B<F_SETFL> operation "
"to enable the B<O_NONBLOCK> open file status flag or by opening a "
"B<fifo>(7)  with B<O_NONBLOCK>.  If any process has the pipe open for "
"writing, reads fail with B<EAGAIN>; otherwise\\[em]with no potential "
"writers\\[em]reads succeed and return empty."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The communication channel provided by a pipe is a I<byte stream>: there is "
"no concept of message boundaries."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"If all file descriptors referring to the write end of a pipe have been "
"closed, then an attempt to B<read>(2)  from the pipe will see end-of-file "
"(B<read>(2)  will return 0).  If all file descriptors referring to the read "
"end of a pipe have been closed, then a B<write>(2)  will cause a B<SIGPIPE> "
"signal to be generated for the calling process.  If the calling process is "
"ignoring this signal, then B<write>(2)  fails with the error B<EPIPE>.  An "
"application that uses B<pipe>(2)  and B<fork>(2)  should use suitable "
"B<close>(2)  calls to close unnecessary duplicate file descriptors; this "
"ensures that end-of-file and B<SIGPIPE>/B<EPIPE> are delivered when "
"appropriate."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "It is not possible to apply B<lseek>(2)  to a pipe."
msgstr ""

#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "Pipe capacity"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"A pipe has a limited capacity.  If the pipe is full, then a B<write>(2)  "
"will block or fail, depending on whether the B<O_NONBLOCK> flag is set (see "
"below).  Different implementations have different limits for the pipe "
"capacity.  Applications should not rely on a particular capacity: an "
"application should be designed so that a reading process consumes data as "
"soon as it is available, so that a writing process does not remain blocked."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Before Linux 2.6.11, the capacity of a pipe was the same as the system page "
"size (e.g., 4096 bytes on i386).  Since Linux 2.6.11, the pipe capacity is "
"16 pages (i.e., 65,536 bytes in a system with a page size of 4096 bytes).  "
"Since Linux 2.6.35, the default pipe capacity is 16 pages, but the capacity "
"can be queried and set using the B<fcntl>(2)  B<F_GETPIPE_SZ> and "
"B<F_SETPIPE_SZ> operations.  See B<fcntl>(2)  for more information."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The following B<ioctl>(2)  operation, which can be applied to a file "
"descriptor that refers to either end of a pipe, places a count of the number "
"of unread bytes in the pipe in the I<int> buffer pointed to by the final "
"argument of the call:"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "ioctl(fd, FIONREAD, &nbytes);\n"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The B<FIONREAD> operation is not specified in any standard, but is provided "
"on many implementations."
msgstr ""

#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "/proc files"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"On Linux, the following files control how much memory can be used for pipes:"
msgstr ""

#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "I</proc/sys/fs/pipe-max-pages> (only in Linux 2.6.34)"
msgstr ""

#.  commit b492e95be0ae672922f4734acf3f5d35c30be948
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"An upper limit, in pages, on the capacity that an unprivileged user (one "
"without the B<CAP_SYS_RESOURCE> capability)  can set for a pipe."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The default value for this limit is 16 times the default pipe capacity (see "
"above); the lower limit is two pages."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"This interface was removed in Linux 2.6.35, in favor of I</proc/sys/fs/pipe-"
"max-size>."
msgstr ""

#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "I</proc/sys/fs/pipe-max-size> (since Linux 2.6.35)"
msgstr ""

#.  commit ff9da691c0498ff81fdd014e7a0731dab2337dac
#.  This limit is not checked on pipe creation, where the capacity is
#.  always PIPE_DEF_BUFS, regardless of pipe-max-size
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The maximum size (in bytes) of individual pipes that can be set by users "
"without the B<CAP_SYS_RESOURCE> capability.  The value assigned to this file "
"may be rounded upward, to reflect the value actually employed for a "
"convenient implementation.  To determine the rounded-up value, display the "
"contents of this file after assigning a value to it."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The default value for this file is 1048576 (1\\ MiB).  The minimum value "
"that can be assigned to this file is the system page size.  Attempts to set "
"a limit less than the page size cause B<write>(2)  to fail with the error "
"B<EINVAL>."
msgstr ""

#.  commit 086e774a57fba4695f14383c0818994c0b31da7c
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Since Linux 4.9, the value on this file also acts as a ceiling on the "
"default capacity of a new pipe or newly opened FIFO."
msgstr ""

#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "I</proc/sys/fs/pipe-user-pages-hard> (since Linux 4.5)"
msgstr ""

#.  commit 759c01142a5d0f364a462346168a56de28a80f52
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The hard limit on the total size (in pages) of all pipes created or set by a "
"single unprivileged user (i.e., one with neither the B<CAP_SYS_RESOURCE> nor "
"the B<CAP_SYS_ADMIN> capability).  So long as the total number of pages "
"allocated to pipe buffers for this user is at this limit, attempts to create "
"new pipes will be denied, and attempts to increase a pipe's capacity will be "
"denied."
msgstr ""

#.  The default was chosen to avoid breaking existing applications that
#.  make intensive use of pipes (e.g., for splicing).
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"When the value of this limit is zero (which is the default), no hard limit "
"is applied."
msgstr ""

#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "I</proc/sys/fs/pipe-user-pages-soft> (since Linux 4.5)"
msgstr ""

#.  commit 759c01142a5d0f364a462346168a56de28a80f52
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The soft limit on the total size (in pages) of all pipes created or set by a "
"single unprivileged user (i.e., one with neither the B<CAP_SYS_RESOURCE> nor "
"the B<CAP_SYS_ADMIN> capability).  So long as the total number of pages "
"allocated to pipe buffers for this user is at this limit, individual pipes "
"created by a user will be limited to one page, and attempts to increase a "
"pipe's capacity will be denied."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"When the value of this limit is zero, no soft limit is applied.  The default "
"value for this file is 16384, which permits creating up to 1024 pipes with "
"the default capacity."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Before Linux 4.9, some bugs affected the handling of the I<pipe-user-pages-"
"soft> and I<pipe-user-pages-hard> limits; see BUGS."
msgstr ""

#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "PIPE_BUF"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"POSIX.1 says that writes of less than B<PIPE_BUF> bytes must be atomic: the "
"output data is written to the pipe as a contiguous sequence.  Writes of more "
"than B<PIPE_BUF> bytes may be nonatomic: the kernel may interleave the data "
"with data written by other processes.  POSIX.1 requires B<PIPE_BUF> to be at "
"least 512 bytes.  (On Linux, B<PIPE_BUF> is 4096 bytes.)  The precise "
"semantics depend on whether the file descriptor is nonblocking "
"(B<O_NONBLOCK>), whether there are multiple writers to the pipe, and on "
"I<n>, the number of bytes to be written:"
msgstr ""

#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<O_NONBLOCK> disabled, I<n> E<lt>= B<PIPE_BUF>"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"All I<n> bytes are written atomically; B<write>(2)  may block if there is "
"not room for I<n> bytes to be written immediately"
msgstr ""

#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<O_NONBLOCK> enabled, I<n> E<lt>= B<PIPE_BUF>"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"If there is room to write I<n> bytes to the pipe, then B<write>(2)  succeeds "
"immediately, writing all I<n> bytes; otherwise B<write>(2)  fails, with "
"I<errno> set to B<EAGAIN>."
msgstr ""

#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<O_NONBLOCK> disabled, I<n> E<gt> B<PIPE_BUF>"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The write is nonatomic: the data given to B<write>(2)  may be interleaved "
"with B<write>(2)s by other process; the B<write>(2)  blocks until I<n> bytes "
"have been written."
msgstr ""

#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<O_NONBLOCK> enabled, I<n> E<gt> B<PIPE_BUF>"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"If the pipe is full, then B<write>(2)  fails, with I<errno> set to "
"B<EAGAIN>.  Otherwise, from 1 to I<n> bytes may be written (i.e., a "
"\"partial write\" may occur; the caller should check the return value from "
"B<write>(2)  to see how many bytes were actually written), and these bytes "
"may be interleaved with writes by other processes."
msgstr ""

#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "Open file status flags"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The only open file status flags that can be meaningfully applied to a pipe "
"or FIFO are B<O_NONBLOCK> and B<O_ASYNC>."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Setting the B<O_ASYNC> flag for the read end of a pipe causes a signal "
"(B<SIGIO> by default) to be generated when new input becomes available on "
"the pipe.  The target for delivery of signals must be set using the "
"B<fcntl>(2)  B<F_SETOWN> command.  On Linux, B<O_ASYNC> is supported for "
"pipes and FIFOs only since Linux 2.6."
msgstr ""

#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "Portability notes"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"On some systems (but not Linux), pipes are bidirectional: data can be "
"transmitted in both directions between the pipe ends.  POSIX.1 requires only "
"unidirectional pipes.  Portable applications should avoid reliance on "
"bidirectional pipe semantics."
msgstr ""

#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "BUGS"
msgstr ""

#.  These bugs where remedied by a series of patches, in particular,
#.  commit b0b91d18e2e97b741b294af9333824ecc3fadfd8 and
#.  commit a005ca0e6813e1d796a7422a7e31d8b8d6555df1
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Before Linux 4.9, some bugs affected the handling of the I<pipe-user-pages-"
"soft> and I<pipe-user-pages-hard> limits when using the B<fcntl>(2)  "
"B<F_SETPIPE_SZ> operation to change a pipe's capacity:"
msgstr ""

#. type: IP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "(a)"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"When increasing the pipe capacity, the checks against the soft and hard "
"limits were made against existing consumption, and excluded the memory "
"required for the increased pipe capacity.  The new increase in pipe capacity "
"could then push the total memory used by the user for pipes (possibly far) "
"over a limit.  (This could also trigger the problem described next.)"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Starting with Linux 4.9, the limit checking includes the memory required for "
"the new pipe capacity."
msgstr ""

#. type: IP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "(b)"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The limit checks were performed even when the new pipe capacity was less "
"than the existing pipe capacity.  This could lead to problems if a user set "
"a large pipe capacity, and then the limits were lowered, with the result "
"that the user could no longer decrease the pipe capacity."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Starting with Linux 4.9, checks against the limits are performed only when "
"increasing a pipe's capacity; an unprivileged user can always decrease a "
"pipe's capacity."
msgstr ""

#. type: IP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "(c)"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "The accounting and checking against the limits were done as follows:"
msgstr ""

#. type: IP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "(1)"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "Test whether the user has exceeded the limit."
msgstr ""

#. type: IP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "(2)"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "Make the new pipe buffer allocation."
msgstr ""

#. type: IP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "(3)"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "Account new allocation against the limits."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"This was racey.  Multiple processes could pass point (1) simultaneously, and "
"then allocate pipe buffers that were accounted for only in step (3), with "
"the result that the user's pipe buffer allocation could be pushed over the "
"limit."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Starting with Linux 4.9, the accounting step is performed before doing the "
"allocation, and the operation fails if the limit would be exceeded."
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Before Linux 4.9, bugs similar to points (a) and (c) could also occur when "
"the kernel allocated memory for a new pipe buffer; that is, when calling "
"B<pipe>(2)  and when opening a previously unopened FIFO."
msgstr ""

#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "SEE ALSO"
msgstr ""

#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"B<mkfifo>(1), B<dup>(2), B<fcntl>(2), B<open>(2), B<pipe>(2), B<poll>(2), "
"B<select>(2), B<socketpair>(2), B<splice>(2), B<stat>(2), B<tee>(2), "
"B<vmsplice>(2), B<mkfifo>(3), B<epoll>(7), B<fifo>(7)"
msgstr ""

#. type: TH
#: debian-bookworm
#, no-wrap
msgid "2022-12-04"
msgstr ""

#. type: TH
#: debian-bookworm
#, no-wrap
msgid "Linux man-pages 6.03"
msgstr ""

#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
msgid ""
"If a process attempts to read from an empty pipe, then B<read>(2)  will "
"block until data is available.  If a process attempts to write to a full "
"pipe (see below), then B<write>(2)  blocks until sufficient data has been "
"read from the pipe to allow the write to complete.  Nonblocking I/O is "
"possible by using the B<fcntl>(2)  B<F_SETFL> operation to enable the "
"B<O_NONBLOCK> open file status flag."
msgstr ""

#. type: TH
#: fedora-40 fedora-rawhide mageia-cauldron
#, no-wrap
msgid "2023-10-31"
msgstr ""

#. type: TH
#: fedora-40 mageia-cauldron
#, no-wrap
msgid "Linux man-pages 6.06"
msgstr ""

#. type: TH
#: fedora-rawhide
#, no-wrap
msgid "Linux man-pages 6.7"
msgstr ""

#. type: TH
#: opensuse-leap-15-6
#, no-wrap
msgid "2023-03-08"
msgstr ""

#. type: TH
#: opensuse-leap-15-6
#, no-wrap
msgid "Linux man-pages 6.04"
msgstr ""

#. type: TH
#: opensuse-tumbleweed
#, no-wrap
msgid "Linux man-pages (unreleased)"
msgstr ""