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195 Commits

Author SHA1 Message Date
Michael Kerrisk 1e64c86bbf intro.1, ldd.1, clone.2, getgroups.2, getpid.2, getsockopt.2, ioctl_list.2, msgop.2, open.2, seccomp.2, setgid.2, setresuid.2, setreuid.2, setuid.2, sigaction.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, syscall.2, syscalls.2, umount.2, clock.3, dlopen.3, fmemopen.3, fpathconf.3, fputwc.3, fputws.3, fseek.3, fseeko.3, gcvt.3, getline.3, getwchar.3, hypot.3, if_nameindex.3, initgroups.3, popen.3, resolver.3, strcoll.3, strdup.3, tzset.3, ulimit.3, wcstombs.3, wctob.3, xdr.3, console_codes.4, random.4, filesystems.5, host.conf.5, hosts.5, proc.5, resolv.conf.5, securetty.5, credentials.7, feature_test_macros.7, hier.7, ipv6.7, packet.7, pthreads.7, raw.7, signal.7, tcp.7, user_namespaces.7, ld.so.8, ldconfig.8: tstamp 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2015-03-29 22:30:09 +02:00
Michael Kerrisk 1533d24295 clone.2: Small rewording of explanation of clone() wrt threads 
Clone has so many effects that it's an oversimplification to say
that the *main* use of clone is to create a thread.  (In fact,
the use of clone() to create new processes may well be more
common, since glibc's fork() is a wrapper that calls clone().)

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2015-03-02 17:25:57 +01:00
Michael Kerrisk 28b44abc49 clone.2: srcfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2015-03-02 17:25:56 +01:00
Josh Triplett 3dd889d9c1 clone.2: Document that clone silently ignores CLONE_PID and CLONE_STOPPED 
Normally, system calls return EINVAL for flags they don't support.
Explicitly document that clone does *not* produce an error for these two
obsolete flags.

Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2015-03-02 17:25:56 +01:00
Michael Kerrisk 6d322d5fc7 time.1, access.2, arch_prctl.2, cacheflush.2, capget.2, clone.2, execve.2, fcntl.2, fork.2, getpid.2, getxattr.2, ioctl.2, ioctl_fat.2, killpg.2, listxattr.2, madvise.2, migrate_pages.2, modify_ldt.2, mprotect.2, msgget.2, msgop.2, perf_event_open.2, ptrace.2, sched_setattr.2, semget.2, semop.2, sendfile.2, set_thread_area.2, setxattr.2, stat.2, statfs.2, wait.2, wait4.2, encrypt.3, mktemp.3, pthread_attr_setschedparam.3, resolver.3, statvfs.3, syslog.3, tzset.3, core.5, host.conf.5, intro.5, proc.5, resolv.conf.5, pthreads.7, socket.7, unix.7, ld.so.8, ldconfig.8: tstamp 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2015-02-21 09:26:52 +01:00
Peng Haitao 87ab04792c clone.2: Fix description of CLONE_PARENT_SETTID 
CLONE_PARENT_SETTID only stores child thread ID in parent memory.

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2015-02-21 08:32:11 +01:00
Kevin Easton 8a76b19ecd clone.2, execve.2: Document interaction of execve(2) with CLONE_FILES 
This patch the fact that a successful execve(2) in a process that
is sharing a file descriptor table results in unsharing the table.

I discovered this through testing and verified it by source
inspection - there is a call to unshare_files() early in
do_execve_common().

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2015-02-21 08:32:11 +01:00
Akihiro Motoki 11a388158f clone.2: ffix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2015-01-16 07:54:01 +01:00
Michael Kerrisk f5d401ddda Removed trailing white space at end of lines 2014-09-21 11:24:24 +02:00
Michael Kerrisk daf084cc33 clone.2, flock.2, getpid.2, getunwind.2, mount.2, reboot.2, semop.2, seteuid.2, setgid.2, setns.2, setresuid.2, setreuid.2, setuid.2, uname.2, unshare.2, clock.3, drand48.3, proc.5, capabilities.7, credentials.7, mq_overview.7, namespaces.7, pid_namespaces.7, svipc.7, user_namespaces.7: tstamp 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-21 11:23:07 +02:00
Michael Kerrisk 9219d20802 clone.2: srcfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-16 10:05:11 +02:00
Michael Kerrisk ac0079383d clone.2: Document EPERM error when using CLONE_NEWUSER from chrooted caller 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:16:03 -07:00
Michael Kerrisk 6fd119e727 clone.2: Document EUSERS error 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:16:03 -07:00
Michael Kerrisk ab3311aa06 clone.2, namespaces.7, pid_namespaces.7, user_namespaces.7: wfix "file system" ==> "filesystem" 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:16:02 -07:00
Michael Kerrisk 5e72cf7d10 clone.2: Improve discussion of flags that can't be specified with CLONE_NEWUSER 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:16:02 -07:00
Michael Kerrisk 5ada4b9491 clone.2: Add more detail on the meaning of CLONE_SYVSEM 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:16:02 -07:00
Michael Kerrisk d34e564554 clone.2: Note restrictions on CLONE_NEWUSER with other CLONE_* flags 
Refer to user_namespaces(7) for restrictions on CLONE_NEWUSER
with other CLONE_* flags.

Also: document EINVAL error for CLONE_NEWUSER|CLONE_FS.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:16:02 -07:00
Michael Kerrisk f00071920e clone.2: EINVAL if (CLONE_NEWUSER|CLONE_NEWPID) && (CLONE_THREAD|CLONE_PARENT) 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:16:01 -07:00
Michael Kerrisk 7e0e902b55 clone.2, getpid.2, credentials.7: Replace reference to namespaces(7) with pid_namespaces(7) 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:59 -07:00
Michael Kerrisk f58fb24f16 clone.2, seteuid.2, setgid.2, setresuid.2, setreuid.2, setuid.2, unshare.2, capabilities.7, credentials.7: Change reference to namespaces(7) to user_namespaces(7) 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:59 -07:00
Michael Kerrisk 365d292a3c clone.2, unshare.2, namespaces.7: clone() and unshare() fail (EPERM) if caller's UID/GID are not mapped 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:59 -07:00
Michael Kerrisk 41096af101 clone.2, setns.2, unshare.2: SEE ALSO: add namespaces(7); remove proc(5) 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk 663e3be88a clone.2: ffix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk ab5dd83f7a clone.2: Standardize text on CLONE_NEW* flags and CAP_SYS_ADMIN 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk 83d9e9b2bc clone.2, namespaces.7: Move some CLONE_NEWUTS text from clone.2 to namespaces.7 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk 9cc7ad66df clone.2: Remove CLONE_NEWUTS text that is duplicated in namespaces(7) 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk 9d005472a8 clone.2, namespaces.7: Move some CLONE_NEWUSER text from clone.2 to namespaces.7 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk 3dd2331ce7 clone.2: Reword discussion of CLONE_NEWNS, removing text also in namespaces(7) 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk 73680728d1 clone.2, namespaces.7: Move some CLONE_NEWNET text from clone.2 to namespaces.7 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk 9343f8e7c3 clone.2, namespaces.7: Move some CLONE_NEWIPC text from clone.2 to namespaces.7 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:57 -07:00
Michael Kerrisk 040eaa70ed clone.2: SEE ALSO: add proc(5) 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Michael Kerrisk 730e9c01cf clone.2: Document behavior of clone(CLONE_NEWUSER | CLONE_NEWXXX) 
Based on email exchanges with Eric Biederman

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Michael Kerrisk a0efdddb73 clone.2: wfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Michael Kerrisk fefbcba85c clone.2: Note capability requirements for using CLONE_NEWUSER before Linux 3.8 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Michael Kerrisk 4d2b3ed7c1 clone.2: Correct kernel version where CLONE_NEWUSER first appeared 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Michael Kerrisk 642ce311ba clone.2: Note that CLONE_NEWUSER needs CONFIG_USER_NS 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Michael Kerrisk 06b3045839 clone.2: Rework Eric's CLONE_NEWUSER patch 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Michael Kerrisk 57ef8c39e7 clone.2: grfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Eric W. Biederman 70d21f174e clone.2: Describe the user namespace (CLONE_NEWUSER) 
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-09-13 20:15:56 -07:00
Michael Kerrisk bea08fec7e adjtimex.2, bind.2, cacheflush.2, clone.2, fallocate.2, fanotify_init.2, fanotify_mark.2, flock.2, futex.2, getdents.2, getpriority.2, getrlimit.2, gettid.2, gettimeofday.2, ioprio_set.2, kexec_load.2, migrate_pages.2, modify_ldt.2, mount.2, move_pages.2, mprotect.2, msgop.2, nfsservctl.2, perf_event_open.2, pread.2, ptrace.2, recvmmsg.2, rename.2, restart_syscall.2, sched_setattr.2, send.2, shmop.2, shutdown.2, sigaction.2, signalfd.2, syscalls.2, timer_create.2, timerfd_create.2, tkill.2, vmsplice.2, wait.2, aio_init.3, confstr.3, exit.3, fmemopen.3, fopen.3, getaddrinfo.3, getauxval.3, getspnam.3, isalpha.3, isatty.3, mallinfo.3, malloc.3, mallopt.3, psignal.3, pthread_attr_setinheritsched.3, qecvt.3, queue.3, rtnetlink.3, strerror.3, strftime.3, toupper.3, towlower.3, towupper.3, initrd.4, locale.5, proc.5, bootparam.7, capabilities.7, ddp.7, fanotify.7, icmp.7, inotify.7, ip.7, ipv6.7, netdevice.7, netlink.7, path_resolution.7, rtld-audit.7, rtnetlink.7, sched.7, signal.7, socket.7, svipc.7, tcp.7, unix.7, ld.so.8: srcfix: Update FIXMEs 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-08-21 16:47:44 -05:00
Michael Kerrisk 8980a50087 access.2, bdflush.2, bind.2, brk.2, chmod.2, chown.2, clone.2, epoll_wait.2, execve.2, fsync.2, getgroups.2, gethostname.2, getpagesize.2, getpriority.2, getrlimit.2, ioperm.2, kexec_load.2, link.2, mkdir.2, mmap.2, msgop.2, perf_event_open.2, process_vm_readv.2, ptrace.2, readlink.2, readv.2, recv.2, rename.2, sched_setaffinity.2, select.2, send.2, seteuid.2, signal.2, sigwaitinfo.2, stat.2, symlink.2, sync.2, sync_file_range.2, sysinfo.2, timer_create.2, uname.2, unlink.2, utime.2, wait.2, abs.3, atoi.3, catopen.3, cerf.3, cexp2.3, clearenv.3, clog2.3, ctime.3, des_crypt.3, ecvt.3, fgetgrent.3, flockfile.3, fseeko.3, ftime.3, ftok.3, ftw.3, getauxval.3, getcwd.3, getdtablesize.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, getline.3, getpass.3, getutent.3, glob.3, insque.3, lseek64.3, memmem.3, mkstemp.3, mktemp.3, on_exit.3, openpty.3, putenv.3, qecvt.3, realpath.3, remove.3, setbuf.3, sigpause.3, strftime.3, strptime.3, strstr.3, strtod.3, tzset.3, updwtmp.3, xcrypt.3, core.5, utmp.5, capabilities.7, charsets.7, environ.7, ipv6.7, man-pages.7, packet.7, vdso.7: tstamp 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-08-19 11:55:41 -05:00
Michael Kerrisk cf17af8246 clone.2: Remove ancient Linux libc details 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-08-18 17:01:48 -05:00
Michael Kerrisk e8796f63a0 clone.2: NOTES: add "C library/kernel ABI differences" subheading 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-08-18 17:01:47 -05:00
Michael Kerrisk 8660ef9f1d locale.1, adjtimex.2, clone.2, fork.2, getrlimit.2, remap_file_pages.2, set_mempolicy.2, swapon.2, a64l.3, adjtime.3, argz_add.3, bstring.3, envz_add.3, fpathconf.3, fseek.3, gcvt.3, getaddrinfo_a.3, getauxval.3, getnameinfo.3, getrpcent.3, getrpcport.3, getspnam.3, getutent.3, inet.3, inet_net_pton.3, key_setsecret.3, makecontext.3, makedev.3, malloc_trim.3, mq_getattr.3, newlocale.3, nl_langinfo.3, perror.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_setschedprio.3, pthread_sigqueue.3, rcmd.3, re_comp.3, resolver.3, rexec.3, rtime.3, scandir.3, setlocale.3, setnetgrent.3, sigvec.3, tsearch.3, core.5, proc.5, charsets.7, locale.7: tstamp 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-05-28 15:42:25 +02:00
Michael Kerrisk e1b6e18657 clone.2: ERRORS: add cross-reference to fork(2) for explanation of EAGAIN 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-05-22 08:23:26 +02:00
Michael Kerrisk efbfd7ecbc clone.2, execve.2, getpriority.2, ipc.2, kcmp.2, killpg.2, msgctl.2, msgget.2, msgop.2, select.2, semctl.2, semget.2, semop.2, setpgid.2, shmctl.2, shmget.2, shmop.2, sigaction.2, signal.2, socket.2, socketpair.2, syscalls.2, umask.2, unshare.2: ffix: Don't allow line break inside "System V" 2014-04-28 09:38:37 +02:00
Michael Kerrisk 04346be5bb clone.2: wfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-04-23 20:40:00 +02:00
Michael Kerrisk 4b4a853a53 clone.2: grfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-03-26 13:46:48 +01:00
Michael Kerrisk bd297db00b clone.2: srcfix: Remove FIXME 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-03-11 11:41:45 +01:00
Michael Kerrisk 6fd69f33d7 clone.2: Note that CLONE_THREAD also in effect required CLONE_VM 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-02-27 09:47:27 +01:00