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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
commit3d08cd331c1adcf0d917392f7e527b3f00511748 (patch)
tree312f0d1e1632f48862f044b8bb87e602dcffb5f9 /man5/proc_pid_map_files.5
parentAdding debian version 6.7-2. (diff)
downloadmanpages-3d08cd331c1adcf0d917392f7e527b3f00511748.tar.xz
manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.zip
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-.\" Copyright (C) 1994, 1995, Daniel Quinlan <quinlan@yggdrasil.com>
-.\" Copyright (C) 2002-2008, 2017, Michael Kerrisk <mtk.manpages@gmail.com>
-.\" Copyright (C) 2023, Alejandro Colomar <alx@kernel.org>
-.\"
-.\" SPDX-License-Identifier: GPL-3.0-or-later
-.\"
-.TH proc_pid_map_files 5 2023-08-15 "Linux man-pages 6.7"
-.SH NAME
-/proc/pid/map_files/ \- memory-mapped files
-.SH DESCRIPTION
-.TP
-.IR /proc/ pid /map_files/ " (since Linux 3.3)"
-.\" commit 640708a2cff7f81e246243b0073c66e6ece7e53e
-This subdirectory contains entries corresponding to memory-mapped
-files (see
-.BR mmap (2)).
-Entries are named by memory region start and end
-address pair (expressed as hexadecimal numbers),
-and are symbolic links to the mapped files themselves.
-Here is an example,
-with the output wrapped and reformatted to fit on an 80-column display:
-.IP
-.in +4n
-.EX
-.RB "#" " ls \-l /proc/self/map_files/"
-lr\-\-\-\-\-\-\-\-. 1 root root 64 Apr 16 21:31
- 3252e00000\-3252e20000 \-> /usr/lib64/ld\-2.15.so
-\&...
-.EE
-.in
-.IP
-Although these entries are present for memory regions that were
-mapped with the
-.B MAP_FILE
-flag, the way anonymous shared memory (regions created with the
-.B MAP_ANON | MAP_SHARED
-flags)
-is implemented in Linux
-means that such regions also appear on this directory.
-Here is an example where the target file is the deleted
-.I /dev/zero
-one:
-.IP
-.in +4n
-.EX
-lrw\-\-\-\-\-\-\-. 1 root root 64 Apr 16 21:33
- 7fc075d2f000\-7fc075e6f000 \-> /dev/zero (deleted)
-.EE
-.in
-.IP
-Permission to access this file is governed by a ptrace access mode
-.B PTRACE_MODE_READ_FSCREDS
-check; see
-.BR ptrace (2).
-.IP
-Until Linux 4.3,
-.\" commit bdb4d100afe9818aebd1d98ced575c5ef143456c
-this directory appeared only if the
-.B CONFIG_CHECKPOINT_RESTORE
-kernel configuration option was enabled.
-.IP
-Capabilities are required to read the contents of the symbolic links in
-this directory: before Linux 5.9, the reading process requires
-.B CAP_SYS_ADMIN
-in the initial user namespace;
-since Linux 5.9, the reading process must have either
-.B CAP_SYS_ADMIN
-or
-.B CAP_CHECKPOINT_RESTORE
-in the initial (i.e. root) user namespace.
-.SH SEE ALSO
-.BR proc (5)