# SOME DESCRIPTIVE TITLE # Copyright (C) YEAR Free Software Foundation, Inc. # This file is distributed under the same license as the PACKAGE package. # FIRST AUTHOR , YEAR. # #, fuzzy msgid "" msgstr "" "Project-Id-Version: PACKAGE VERSION\n" "POT-Creation-Date: 2024-06-01 06:21+0200\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" "Last-Translator: FULL NAME \n" "Language-Team: LANGUAGE \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 "setns" 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 "setns - reassociate thread with a namespace" msgstr "" #. type: SH #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "LIBRARY" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "Standard C library (I, I<-lc>)" msgstr "" #. type: SH #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "SYNOPSIS" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "" "B<#define _GNU_SOURCE> /* See feature_test_macros(7) */\n" "B<#include Esched.hE>\n" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "BIB<, int >IB<);>\n" 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 "" "The B() system call allows the calling thread to move into different " "namespaces. The I argument is one of the following:" msgstr "" #. type: IP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "\\[bu]" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "a file descriptor referring to one of the magic links in a IpidI directory (or a bind mount to such a link);" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "a PID file descriptor (see B(2))." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "The I argument is interpreted differently in each case." msgstr "" #. type: SS #: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron #: opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "fd refers to a IpidI link" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "If I refers to a IpidI link, then B() reassociates " "the calling thread with the namespace associated with that link, subject to " "any constraints imposed by the I argument. In this usage, each call " "to B() changes just one of the caller's namespace memberships." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "The I argument specifies which type of namespace the calling thread " "may be reassociated with. This argument can have I of the following " "values:" msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B<0>" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "Allow any type of namespace to be joined." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B (since Linux 4.6)" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "I must refer to a cgroup namespace." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B (since Linux 3.0)" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "I must refer to an IPC namespace." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B (since Linux 3.0)" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "I must refer to a network namespace." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B (since Linux 3.8)" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "I must refer to a mount namespace." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B (since Linux 3.8)" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "I must refer to a descendant PID namespace." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B (since Linux 5.8)" msgstr "" #. commit 76c12881a38aaa83e1eb4ce2fada36c3a732bad4 #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "I must refer to a time namespace." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B (since Linux 3.8)" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "I must refer to a user namespace." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "B (since Linux 3.0)" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "I must refer to a UTS namespace." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "Specifying I as 0 suffices if the caller knows (or does not care) " "what type of namespace is referred to by I. Specifying a nonzero value " "for I is useful if the caller does not know what type of namespace " "is referred to by I and wants to ensure that the namespace is of a " "particular type. (The caller might not know the type of the namespace " "referred to by I if the file descriptor was opened by another process " "and, for example, passed to the caller via a UNIX domain socket.)" msgstr "" #. type: SS #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "fd is a PID file descriptor" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "Since Linux 5.8, I may refer to a PID file descriptor obtained from " "B(2) or B(2). In this usage, B() atomically " "moves the calling thread into one or more of the same namespaces as the " "thread referred to by I." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "The I argument is a bit mask specified by ORing together I of the B namespace constants listed above. The caller is " "moved into each of the target thread's namespaces that is specified in " "I; the caller's memberships in the remaining namespaces are left " "unchanged." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "For example, the following code would move the caller into the same user, " "network, and UTS namespaces as PID 1234, but would leave the caller's other " "namespace memberships unchanged:" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "" "int fd = pidfd_open(1234, 0);\n" "setns(fd, CLONE_NEWUSER | CLONE_NEWNET | CLONE_NEWUTS);\n" msgstr "" #. type: SS #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "Details for specific namespace types" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "Note the following details and restrictions when reassociating with specific " "namespace types:" msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "User namespaces" msgstr "" #. See kernel/user_namespace.c:userns_install() [3.8 source] #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "A process reassociating itself with a user namespace must have the " "B capability in the target user namespace. (This necessarily " "implies that it is only possible to join a descendant user namespace.) Upon " "successfully joining a user namespace, a process is granted all capabilities " "in that namespace, regardless of its user and group IDs." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "A multithreaded process may not change user namespace with B()." 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 permitted to use B() to reenter the caller's current user " "namespace. This prevents a caller that has dropped capabilities from " "regaining those capabilities via a call to B()." msgstr "" #. commit e66eded8309ebf679d3d3c1f5820d1f2ca332c71 #. https://lwn.net/Articles/543273/ #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "For security reasons, a process can't join a new user namespace if it is " "sharing filesystem-related attributes (the attributes whose sharing is " "controlled by the B(2) B flag) with another process." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "For further details on user namespaces, see B(7)." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "Mount namespaces" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "Changing the mount namespace requires that the caller possess both " "B and B capabilities in its own user " "namespace and B in the user namespace that owns the target " "mount namespace." msgstr "" #. Above check is in fs/namespace.c:mntns_install() [3.8 source] #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "A process can't join a new mount namespace if it is sharing filesystem-" "related attributes (the attributes whose sharing is controlled by the " "B(2) B flag) with another process." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "See B(7) for details on the interaction of user namespaces " "and mount namespaces." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "PID namespaces" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "In order to reassociate itself with a new PID namespace, the caller must " "have the B capability both in its own user namespace and in " "the user namespace that owns the target PID namespace." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "Reassociating the PID namespace has somewhat different from other namespace " "types. Reassociating the calling thread with a PID namespace changes only " "the PID namespace that subsequently created child processes of the caller " "will be placed in; it does not change the PID namespace of the caller itself." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "Reassociating with a PID namespace is allowed only if the target PID " "namespace is a descendant (child, grandchild, etc.) of, or is the same as, " "the current PID namespace of the caller." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "For further details on PID namespaces, see B(7)." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "Cgroup namespaces" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "In order to reassociate itself with a new cgroup namespace, the caller must " "have the B capability both in its own user namespace and in " "the user namespace that owns the target cgroup namespace." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "Using B() to change the caller's cgroup namespace does not change " "the caller's cgroup memberships." msgstr "" #. type: TP #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "Network, IPC, time, and UTS namespaces" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "In order to reassociate itself with a new network, IPC, time, or UTS " "namespace, the caller must have the B capability both in its " "own user namespace and in the user namespace that owns the target namespace." msgstr "" #. type: SH #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "RETURN VALUE" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "On success, B() returns 0. On failure, -1 is returned and I " "is set to indicate the error." msgstr "" #. type: SH #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "ERRORS" msgstr "" #. type: TP #: 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 "I is not a valid file descriptor." msgstr "" #. type: TP #: 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 "" "I refers to a namespace whose type does not match that specified in " "I." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "There is problem with reassociating the thread with the specified namespace." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "The caller tried to join an ancestor (parent, grandparent, and so on) PID " "namespace." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "The caller attempted to join the user namespace in which it is already a " "member." msgstr "" #. commit e66eded8309ebf679d3d3c1f5820d1f2ca332c71 #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "The caller shares filesystem (B) state (in particular, the root " "directory) with other processes and tried to join a new user namespace." msgstr "" #. See kernel/user_namespace.c::userns_install() [kernel 3.15 sources] #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "The caller is multithreaded and tried to join a new user namespace." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "I is a PID file descriptor and I is invalid (e.g., it is 0)." msgstr "" #. type: TP #: 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 "Cannot allocate sufficient memory to change the specified namespace." msgstr "" #. type: TP #: 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 calling thread did not have the required capability for this operation." msgstr "" #. type: TP #: 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 "" "I is a PID file descriptor but the process it refers to no longer exists " "(i.e., it has terminated and been waited on)." msgstr "" #. type: SH #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "STANDARDS" msgstr "" #. type: Plain text #: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron #: opensuse-leap-15-6 opensuse-tumbleweed msgid "Linux." msgstr "" #. type: SH #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "VERSIONS" msgstr "" #. type: Plain text #: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron #: opensuse-leap-15-6 opensuse-tumbleweed msgid "Linux 3.0, glibc 2.14." msgstr "" #. type: SH #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "NOTES" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "For further information on the IpidI magic links, see " "B(7)." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "Not all of the attributes that can be shared when a new thread is created " "using B(2) can be changed using B()." msgstr "" #. type: SH #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "EXAMPLES" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "The program below takes two or more arguments. The first argument specifies " "the pathname of a namespace file in an existing IpidI " "directory. The remaining arguments specify a command and its arguments. " "The program opens the namespace file, joins that namespace using B(), " "and executes the specified command inside that namespace." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "The following shell session demonstrates the use of this program (compiled " "as a binary named I) in conjunction with the B " "example program in the B(2) man page (complied as a binary named " "I)." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "We begin by executing the example program in B(2) in the " "background. That program creates a child in a separate UTS namespace. The " "child changes the hostname in its namespace, and then both processes display " "the hostnames in their UTS namespaces, so that we can see that they are " "different." msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "" "$ B # Need privilege for namespace operations\n" "Password:\n" "# B<./newuts bizarro &>\n" "[1] 3549\n" "clone() returned 3550\n" "uts.nodename in child: bizarro\n" "uts.nodename in parent: antero\n" "# B # Verify hostname in the shell\n" "antero\n" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed msgid "" "We then run the program shown below, using it to execute a shell. Inside " "that shell, we verify that the hostname is the one set by the child created " "by the first program:" msgstr "" #. type: Plain text #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "" "# B<./ns_exec /proc/3550/ns/uts /bin/bash>\n" "# B # Executed in shell started by ns_exec\n" "bizarro\n" msgstr "" #. type: SS #: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide #: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed #, no-wrap msgid "Program source" msgstr "" #. type: Plain text #: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron #: opensuse-tumbleweed #, no-wrap msgid "" "#define _GNU_SOURCE\n" "#include Eerr.hE\n" "#include Efcntl.hE\n" "#include Esched.hE\n" "#include Estdio.hE\n" "#include Estdlib.hE\n" "#include Eunistd.hE\n" "\\&\n" "int\n" "main(int argc, char *argv[])\n" "{\n" " int fd;\n" "\\&\n" " if (argc E 3) {\n" " fprintf(stderr, \"%s /proc/PID/ns/FILE cmd args...\\en\", argv[0]);\n" " exit(EXIT_FAILURE);\n" " }\n" "\\&\n" " /* Get file descriptor for namespace; the file descriptor is opened\n" " with O_CLOEXEC so as to ensure that it is not inherited by the\n" " program that is later executed. */\n" "\\&\n" " fd = open(argv[1], O_RDONLY | O_CLOEXEC);\n" " if (fd == -1)\n" " err(EXIT_FAILURE, \"open\");\n" "\\&\n" " if (setns(fd, 0) == -1) /* Join that namespace */\n" " err(EXIT_FAILURE, \"setns\");\n" "\\&\n" " execvp(argv[2], &argv[2]); /* Execute a command in namespace */\n" " err(EXIT_FAILURE, \"execvp\");\n" "}\n" msgstr "" #. SRC END #. 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(1), B(2), B(2), B(2), B(2), " "B(7), B(7)" msgstr "" #. type: TH #: debian-bookworm #, no-wrap msgid "2023-02-05" msgstr "" #. type: TH #: debian-bookworm #, no-wrap msgid "Linux man-pages 6.03" msgstr "" #. type: SS #: debian-bookworm #, no-wrap msgid "fd refers to a /proc/[pid]/ns/ link" msgstr "" #. type: Plain text #: debian-bookworm msgid "" "The B() system call first appeared in Linux 3.0; library support was " "added in glibc 2.14." msgstr "" #. type: Plain text #: debian-bookworm msgid "The B() system call is Linux-specific." msgstr "" #. type: Plain text #: debian-bookworm opensuse-leap-15-6 #, no-wrap msgid "" "#define _GNU_SOURCE\n" "#include Eerr.hE\n" "#include Efcntl.hE\n" "#include Esched.hE\n" "#include Estdio.hE\n" "#include Estdlib.hE\n" "#include Eunistd.hE\n" msgstr "" #. type: Plain text #: debian-bookworm opensuse-leap-15-6 #, no-wrap msgid "" "int\n" "main(int argc, char *argv[])\n" "{\n" " int fd;\n" msgstr "" #. type: Plain text #: debian-bookworm opensuse-leap-15-6 #, no-wrap msgid "" " if (argc E 3) {\n" " fprintf(stderr, \"%s /proc/PID/ns/FILE cmd args...\\en\", argv[0]);\n" " exit(EXIT_FAILURE);\n" " }\n" msgstr "" #. type: Plain text #: debian-bookworm opensuse-leap-15-6 #, no-wrap msgid "" " /* Get file descriptor for namespace; the file descriptor is opened\n" " with O_CLOEXEC so as to ensure that it is not inherited by the\n" " program that is later executed. */\n" msgstr "" #. type: Plain text #: debian-bookworm opensuse-leap-15-6 #, no-wrap msgid "" " fd = open(argv[1], O_RDONLY | O_CLOEXEC);\n" " if (fd == -1)\n" " err(EXIT_FAILURE, \"open\");\n" msgstr "" #. type: Plain text #: debian-bookworm opensuse-leap-15-6 #, no-wrap msgid "" " if (setns(fd, 0) == -1) /* Join that namespace */\n" " err(EXIT_FAILURE, \"setns\");\n" msgstr "" #. type: Plain text #: debian-bookworm opensuse-leap-15-6 #, no-wrap msgid "" " execvp(argv[2], &argv[2]); /* Execute a command in namespace */\n" " err(EXIT_FAILURE, \"execvp\");\n" "}\n" 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 "2023-04-03" 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 ""