Commit Graph

165 Commits

Author SHA1 Message Date
Michael Kerrisk 63121bd499 pldd.1, bpf.2, chdir.2, clone.2, fanotify_init.2, fanotify_mark.2, intro.2, ipc.2, mount.2, mprotect.2, msgctl.2, msgget.2, msgop.2, pivot_root.2, pkey_alloc.2, poll.2, prctl.2, semctl.2, semget.2, semop.2, setxattr.2, shmctl.2, shmget.2, shmop.2, tkill.2, dlopen.3, exec.3, ftok.3, getutent.3, on_exit.3, strcat.3, cpuid.4, proc.5, capabilities.7, cgroup_namespaces.7, credentials.7, fanotify.7, mount_namespaces.7, namespaces.7, sched.7, signal.7, socket.7, unix.7, user_namespaces.7, vdso.7, xattr.7, ld.so.8: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-08-02 08:34:32 +02:00
Michael Kerrisk e2340cf748 unix.7: Note SCM_RIGHTS interaction with RLIMIT_NOFILE
If the file descriptors received in SCM_RIGHTS would cause
the process to its exceed RLIMIT_NOFILE limit, the excess
FDs are discarded.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-06-29 22:13:25 +02:00
Michael Kerrisk d1a719857b locale.1, memusage.1, pldd.1, _syscall.2, add_key.2, bind.2, bpf.2, chown.2, clone.2, copy_file_range.2, eventfd.2, execve.2, futex.2, getdents.2, getrlimit.2, ioctl_fat.2, ioctl_ns.2, kcmp.2, kexec_load.2, keyctl.2, listxattr.2, lseek.2, membarrier.2, memfd_create.2, mmap.2, mprotect.2, msgop.2, open_by_handle_at.2, perf_event_open.2, pipe.2, readdir.2, readlink.2, readv.2, recvmmsg.2, request_key.2, sched_setaffinity.2, seccomp.2, select.2, select_tut.2, sendmmsg.2, setns.2, signalfd.2, spu_run.2, stat.2, sysctl.2, tee.2, timer_create.2, timerfd_create.2, truncate.2, uname.2, unshare.2, userfaultfd.2, ustat.2, wait.2, CPU_SET.3, __ppc_get_timebase.3, argz_add.3, asprintf.3, backtrace.3, basename.3, bswap.3, bzero.3, cacos.3, cacosh.3, catan.3, catanh.3, catgets.3, clock_getcpuclockid.3, confstr.3, ctime.3, dl_iterate_phdr.3, dlinfo.3, duplocale.3, encrypt.3, end.3, endian.3, fgetws.3, fmemopen.3, fopencookie.3, fputws.3, frexp.3, ftw.3, get_nprocs_conf.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getgrouplist.3, getifaddrs.3, getline.3, getlogin.3, getopt.3, getpass.3, getprotoent_r.3, getpwnam.3, getservent_r.3, getsubopt.3, glob.3, gnu_get_libc_version.3, hsearch.3, if_nameindex.3, index.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, iswblank.3, iswspace.3, makecontext.3, mallinfo.3, malloc_hook.3, malloc_info.3, mallopt.3, matherr.3, mbrtowc.3, mbsnrtowcs.3, mbsrtowcs.3, mbstowcs.3, mbtowc.3, mcheck.3, memchr.3, mq_getattr.3, mq_notify.3, newlocale.3, nl_langinfo.3, offsetof.3, perror.3, posix_spawn.3, printf.3, pthread_attr_init.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_mutexattr_setrobust.3, pthread_setaffinity_np.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, qsort.3, rand.3, readdir.3, regex.3, rpmatch.3, rtime.3, scanf.3, sem_wait.3, setaliasent.3, setbuf.3, stpcpy.3, stpncpy.3, strcat.3, strchr.3, strcpy.3, strdup.3, strerror.3, strfromd.3, strftime.3, strlen.3, strnlen.3, strsep.3, strstr.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, strxfrm.3, termios.3, tsearch.3, wcpcpy.3, wcpncpy.3, wcrtomb.3, wcscat.3, wcscpy.3, wcslen.3, wcsncat.3, wcsncmp.3, wcsncpy.3, wcsnlen.3, wcsnrtombs.3, wcsrtombs.3, wcsstr.3, wcstok.3, wcstombs.3, wcwidth.3, wprintf.3, console_codes.4, dsp56k.4, full.4, initrd.4, loop.4, vcs.4, charmap.5, core.5, elf.5, locale.5, proc.5, repertoiremap.5, sysfs.5, termcap.5, aio.7, bpf-helpers.7, cgroups.7, charsets.7, complex.7, fanotify.7, feature_test_macros.7, inotify.7, locale.7, man-pages.7, man.7, pkeys.7, pthreads.7, rtld-audit.7, sock_diag.7, unix.7, user_namespaces.7, utf-8.7: Use '\e' rather than '\\' to get a backslash
Quoting Branden:

*roff escape sequences may sometimes look like C escapes, but that
is misleading.  *roff is in part a macro language and that means
recursive expansion to arbitrary depths.

You can get away with "\\" in a context where no macro expansion
is taking place, but try to spell a literal backslash this way in
the argument to a macro and you will likely be unhappy with
results.

Try viewing the attached file with "man -l".

"\e" is the preferred and portable way to get a portable "escape
literal" going back to CSTR #54, the original Bell Labs troff
paper.

groff(7) discusses the issue:

  \\     reduces to a single backslash; useful to delay its
         interpretation as escape character in copy mode.  For a
         printable backslash, use \e, or even better \[rs], to be
         independent from the current escape character.

As of groff 1.22.4, groff_man(7) does as well:

  \e     Widely used in man pages to represent a backslash output
         glyph.  It works reliably as long as the .ec request is
         not used, which should never happen in man pages, and it
         is slightly more portable than the more exact ‘\(rs’
         (“reverse solidus”) escape sequence.

People not concerned with portability to extremely old troffs should
probably just use \(rs (or \[rs]), as it means "the backslash
glyph", not "the glyph corresponding to whatever the current escape
character is".

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-02-27 15:32:50 +01:00
Michael Kerrisk 928c3e7c95 unix.7: wfix
Reported-by: Felipe Gasper <felipe@felipegasper.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-12-23 19:09:33 +01:00
Michael Kerrisk 421d34c632 unix.7: Clarify that SO_PASSCRED behavior
Clarify that SO_PASSCRED results in SCM_CREDENTIALS data in each
subsequently received message.

See https://bugzilla.kernel.org/show_bug.cgi?id=201805

Reported-by: Felipe Gasper <felipe@felipegasper.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-12-23 19:09:33 +01:00
Michael Kerrisk 3d3cddde94 unix.7: Rework SO_PEERCRED text for greater clarity
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-12-23 19:09:33 +01:00
Michael Kerrisk 88fedfa061 unix.7: Explicitly note that SO_PASSCRED provides SCM_CREDENTIALS messages
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-12-23 19:09:33 +01:00
Michael Kerrisk c02ed554e9 unix.7: wfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-12-23 19:09:33 +01:00
Michael Kerrisk 744c8fa8d2 unix.7: Improve wording describing socket option argument/return values
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-12-23 19:09:33 +01:00
Michael Kerrisk 7df0e773c7 unix.7: wfix: s/foreign process/peer process/
The more common parlance these days is, I think, "peer".

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-28 12:30:44 +02:00
Michael Kerrisk 94950b9a68 socket.7, unix.7: Move text describing SO_PEERCRED from socket(7) to unix(7)
This is, AFAIK, an option specific to UNIX domain sockets, so
place it in unix(7).

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-28 12:30:44 +02:00
Michael Kerrisk ffab8460c6 unix.7: Refer reader to socket(7) for information about SO_PEEK_OFF
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-28 12:30:44 +02:00
Michael Kerrisk 1221abb60e unix.7: tfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-28 12:30:44 +02:00
Michael Kerrisk ffad6a017f unix.7: Document SCM_SECURITY ancillary data
And fix a wording error in the description of SO_PASSSEC.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-28 12:30:44 +02:00
Michael Kerrisk 366a9bffc8 unix.7: Document SO_PASSSEC
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-28 11:50:11 +02:00
Michael Kerrisk 5af0f223d1 unix.7: Ancillary data forms a barrier when receiving on a stream socket
Thanks to a tip from Keith Packard:
https://keithp.com/blogs/fd-passing/
(Also verified by experiment.)

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-17 09:39:56 +02:00
Michael Kerrisk 5219daec26 unix.7: One must send at least one byte of real data with ancillary data
When sending ancillary data, at least one byte of real data should
also be sent.  This is strictly necessary for stream sockets
(verified by experiment). It is not required for datagram sockets
on Linux (verified by experiment), but portable applications
should do so.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-15 10:33:42 +02:00
Michael Kerrisk c0e56ed687 unix.7: Clarify treatment of incoming ancillary data if 'msg_control' is NULL
If no buffer is supplied for incoming ancillary data, then
the data is lost.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-15 10:33:32 +02:00
Michael Kerrisk 4564dd1fee unix.7: If the buffer to receive SCM_RIGHTS FDs is too small, FDs are closed
If the ancillary data buffer for receiving SCM_RIGHTS file
descriptors is too small, then the excess file descriptors are
automatically closed in the receiving process. Verified by
experiment.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-15 10:16:49 +02:00
Michael Kerrisk b65f4c691d unix.7: tfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-15 10:16:49 +02:00
Michael Kerrisk 879962006f unix.7: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-15 09:50:30 +02:00
Michael Kerrisk 5b5cb19580 unix.7: When sending ancillary data, only one item of each type may be sent
Verified by experiment and reading the source code (although
the SCM_RIGHTS case is not so clear to me in the source code).

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-10 07:14:50 +02:00
Michael Kerrisk 52900faab3 unix.7: tfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-10 07:14:50 +02:00
Michael Kerrisk 311bf2f694 unix.7: Minor wording fixes
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-10 07:14:50 +02:00
Michael Kerrisk 05bf3361a6 unix.7: grfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-10 07:14:50 +02:00
Michael Kerrisk c87721467e unix.7: Note behavior if buffer to receive ancillary data is too small
If the buffer supplied to recvmsg() to receive ancillary data is
too small, then the data is truncated and the MSG_CTRUNC flag is
set.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-08 21:13:08 +02:00
Michael Kerrisk 13600496d3 unix.7: Enhance the description of SCM_RIGHTS
The existing description is rather thin. More can be said.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-08 10:57:27 +02:00
Michael Kerrisk 8bdcf4bf81 unix.7: There is a limit on the size of the file descriptor array for SCM_RIGHTS
The limit is defined in the kernel as SCM_MAX_FD (253).

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-08 10:38:44 +02:00
Michael Kerrisk f1081bdc42 unix.7: Fix a minor imprecision in description of SCM_CREDENTIALS
To spoof credentials requires privilege (i.e., capabilities),
not UID 0.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-08 10:21:43 +02:00
Michael Kerrisk b66d5714b1 unix.7: grfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-08 10:20:52 +02:00
Michael Kerrisk bdef802116 unix.7: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-08 10:20:32 +02:00
Michael Kerrisk 09b8afdc04 execve.2, fallocate.2, getrlimit.2, io_submit.2, membarrier.2, mmap.2, msgget.2, open.2, ptrace.2, readv.2, semget.2, shmget.2, shutdown.2, syscall.2, wait.2, wait4.2, crypt.3, encrypt.3, fseek.3, getcwd.3, makedev.3, pthread_create.3, puts.3, tsearch.3, elf.5, filesystems.5, group.5, passwd.5, sysfs.5, mount_namespaces.7, posixoptions.7, time.7, unix.7, vdso.7, xattr.7, ld.so.8: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-04-30 17:41:31 +02:00
Jakub Wilk 3eb078c52f unix.7: tfix
Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-04-27 14:01:50 +02:00
Michael Kerrisk 7934bcdfdc unix.7: ERRORS: add EBADF for sending closed file descriptor with SCM_RIGHTS
As noted by Rusty Russell:

I was really surprised that sendmsg() returned EBADF on a valid fd;
turns out I was using sendmsg with SCM_RIGHTS to send a closed fd,
which gives EBADF (see test program below).

But this is only obliquely referenced in unix(7):

       SCM_RIGHTS
              Send or receive a set  of  open  file  descriptors
              from  another  process.  The data portion contains
              an integer array of  the  file  descriptors.   The
              passed file descriptors behave as though they have
              been created with dup(2).

EBADF is not mentioned in the unix(7) ERRORS (it's mentioned in
dup(2)).

int fdpass_send(int sockout, int fd)
{
	/* From the cmsg(3) manpage: */
	struct msghdr msg = { 0 };
	struct cmsghdr *cmsg;
	struct iovec iov;
	char c = 0;
	union {         /* Ancillary data buffer, wrapped in a union
			   in order to ensure it is suitably aligned */
		char buf[CMSG_SPACE(sizeof(fd))];
		struct cmsghdr align;
	} u;

	msg.msg_control = u.buf;
	msg.msg_controllen = sizeof(u.buf);
	memset(&u, 0, sizeof(u));
	cmsg = CMSG_FIRSTHDR(&msg);
	cmsg->cmsg_level = SOL_SOCKET;
	cmsg->cmsg_type = SCM_RIGHTS;
	cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
	memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));

	msg.msg_name = NULL;
	msg.msg_namelen = 0;
	msg.msg_iov = &iov;
	msg.msg_iovlen = 1;
	msg.msg_flags = 0;

	/* Keith Packard reports that 0-length sends don't work, so we
	 * always send 1 byte. */
	iov.iov_base = &c;
	iov.iov_len = 1;

	return sendmsg(sockout, &msg, 0);
}

int fdpass_recv(int sockin)
{
	/* From the cmsg(3) manpage: */
	struct msghdr msg = { 0 };
	struct cmsghdr *cmsg;
	struct iovec iov;
	int fd;
	char c;
	union {         /* Ancillary data buffer, wrapped in a union
			   in order to ensure it is suitably aligned */
		char buf[CMSG_SPACE(sizeof(fd))];
		struct cmsghdr align;
	} u;

	msg.msg_control = u.buf;
	msg.msg_controllen = sizeof(u.buf);

	msg.msg_name = NULL;
	msg.msg_namelen = 0;
	msg.msg_iov = &iov;
	msg.msg_iovlen = 1;
	msg.msg_flags = 0;

	iov.iov_base = &c;
	iov.iov_len = 1;

	if (recvmsg(sockin, &msg, 0) < 0)
		return -1;

	cmsg = CMSG_FIRSTHDR(&msg);
        if (!cmsg
	    || cmsg->cmsg_len != CMSG_LEN(sizeof(fd))
	    || cmsg->cmsg_level != SOL_SOCKET
	    || cmsg->cmsg_type != SCM_RIGHTS) {
		errno = -EINVAL;
		return -1;
	}

	memcpy(&fd, CMSG_DATA(cmsg), sizeof(fd));
	return fd;
}

static void child(int sockfd)
{
	int newfd = fdpass_recv(sockfd);
	assert(newfd < 0);
	exit(0);
}

int main(void)
{
	int sv[2];
	int pid, ret;

	assert(socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == 0);

	pid = fork();
	if (pid == 0) {
		close(sv[1]);
		child(sv[0]);
	}

	close(sv[0]);
	ret = fdpass_send(sv[1], sv[0]);
	printf("fdpass of bad fd return %i (%s)\n", ret, strerror(errno));
	return 0;
}

Reported-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-04-12 10:55:29 +02:00
Michael Kerrisk d3e7786def unix.7: wfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-04-12 10:42:34 +02:00
Michael Kerrisk a23d8efafc capget.2, fanotify_init.2, fcntl.2, ioctl_tty.2, madvise.2, mbind.2, prctl.2, sched_setaffinity.2, hash.3, isgreater.3, posix_fallocate.3, sigvec.3, full.4, sd.4, wavelan.4, core.5, host.conf.5, epoll.7, signal.7, unix.7, user_namespaces.7: wfix (will fail --> fail/fails)
Reported-by: Pedro Alves <palves@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-20 16:36:57 +02:00
Michael Kerrisk 4b8c67d976 iconv.1, ldd.1, locale.1, localedef.1, memusage.1, memusagestat.1, mtrace.1, pldd.1, sprof.1, time.1, _syscall.2, add_key.2, alloc_hugepages.2, arch_prctl.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, fanotify_init.2, fcntl.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_console.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_getfsmap.2, ioctl_iflags.2, ioctl_list.2, ioctl_ns.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, ipc.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readlink.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, signal.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscall.2, syscalls.2, sysctl.2, sysfs.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, uname.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, ustat.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2, CPU_SET.3, INFINITY.3, __ppc_get_timebase.3, __ppc_set_ppr_med.3, __ppc_yield.3, __setfpucw.3, acos.3, acosh.3, adjtime.3, aio_fsync.3, aio_init.3, aio_read.3, aio_return.3, aio_suspend.3, aio_write.3, alloca.3, argz_add.3, asin.3, asinh.3, asprintf.3, assert.3, assert_perror.3, atan.3, atan2.3, atanh.3, atexit.3, backtrace.3, basename.3, bindresvport.3, bsd_signal.3, bsearch.3, bswap.3, btree.3, byteorder.3, bzero.3, canonicalize_file_name.3, carg.3, cbrt.3, ccos.3, ccosh.3, ceil.3, cexp.3, cfree.3, clearenv.3, clock.3, clock_getcpuclockid.3, clog.3, clog10.3, clog2.3, cmsg.3, confstr.3, copysign.3, cos.3, cosh.3, crypt.3, csin.3, csinh.3, csqrt.3, ctan.3, ctanh.3, ctime.3, dbopen.3, dl_iterate_phdr.3, dladdr.3, dlerror.3, dlinfo.3, dlopen.3, dlsym.3, drand48.3, drand48_r.3, duplocale.3, encrypt.3, end.3, endian.3, envz_add.3, erf.3, erfc.3, err.3, errno.3, error.3, ether_aton.3, euidaccess.3, exec.3, exit.3, exp.3, exp10.3, exp2.3, expm1.3, fabs.3, fcloseall.3, fdim.3, fenv.3, ferror.3, fexecve.3, fflush.3, ffs.3, fgetc.3, fgetgrent.3, fgetpwent.3, finite.3, floor.3, fma.3, fmax.3, fmemopen.3, fmin.3, fmod.3, fmtmsg.3, fopen.3, fopencookie.3, fpclassify.3, fpurge.3, fputwc.3, fputws.3, frexp.3, fseek.3, fseeko.3, ftime.3, fts.3, ftw.3, futimes.3, gamma.3, gcvt.3, get_nprocs_conf.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getauxval.3, getcontext.3, getcwd.3, getdate.3, getentropy.3, getenv.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getifaddrs.3, getipnodebyname.3, getline.3, getlogin.3, getmntent.3, getnameinfo.3, getnetent.3, getnetent_r.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getrpcent_r.3, getrpcport.3, gets.3, getservent.3, getservent_r.3, getspnam.3, getsubopt.3, getttyent.3, getumask.3, getutent.3, getwchar.3, glob.3, gnu_get_libc_version.3, grantpt.3, gsignal.3, hash.3, hsearch.3, hypot.3, iconv.3, iconv_close.3, iconv_open.3, if_nameindex.3, if_nametoindex.3, ilogb.3, inet.3, inet_net_pton.3, inet_ntop.3, inet_pton.3, initgroups.3, insque.3, intro.3, isalpha.3, isgreater.3, j0.3, key_setsecret.3, killpg.3, ldexp.3, lgamma.3, lio_listio.3, lockf.3, log.3, log10.3, log1p.3, log2.3, logb.3, login.3, lrint.3, lround.3, lsearch.3, lseek64.3, makecontext.3, makedev.3, mallinfo.3, malloc.3, malloc_get_state.3, malloc_info.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, mallopt.3, matherr.3, mbsnrtowcs.3, mbsrtowcs.3, mbstowcs.3, mcheck.3, memccpy.3, memchr.3, memcmp.3, memcpy.3, mkfifo.3, mkstemp.3, mktemp.3, modf.3, mpool.3, mq_close.3, mq_getattr.3, mq_notify.3, mq_open.3, mq_receive.3, mq_send.3, mtrace.3, newlocale.3, nextafter.3, nextup.3, nl_langinfo.3, ntp_gettime.3, offsetof.3, on_exit.3, open_memstream.3, opendir.3, openpty.3, perror.3, popen.3, posix_fallocate.3, posix_madvise.3, posix_memalign.3, posix_openpt.3, posix_spawn.3, pow.3, pow10.3, printf.3, profil.3, program_invocation_name.3, psignal.3, pthread_atfork.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_detach.3, pthread_exit.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_self.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, pthread_sigqueue.3, pthread_testcancel.3, pthread_tryjoin_np.3, ptsname.3, putgrent.3, putpwent.3, qsort.3, random.3, random_r.3, rcmd.3, re_comp.3, readdir.3, realpath.3, recno.3, regex.3, remainder.3, remove.3, remquo.3, resolver.3, rexec.3, rint.3, round.3, rpc.3, rpmatch.3, rtime.3, scalb.3, scalbln.3, scandir.3, scanf.3, sched_getcpu.3, sem_close.3, sem_destroy.3, sem_getvalue.3, sem_init.3, sem_open.3, sem_wait.3, setaliasent.3, setbuf.3, setenv.3, setlocale.3, setlogmask.3, setnetgrent.3, shm_open.3, signbit.3, significand.3, sigpause.3, sigqueue.3, sigset.3, sigvec.3, sin.3, sincos.3, sinh.3, sleep.3, sockatmark.3, sqrt.3, statvfs.3, stdarg.3, stdin.3, strcasecmp.3, strcat.3, strchr.3, strcoll.3, strcpy.3, strdup.3, strerror.3, strfmon.3, strfromd.3, strftime.3, strptime.3, strsignal.3, strstr.3, strtod.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, syslog.3, system.3, sysv_signal.3, tan.3, tanh.3, telldir.3, tempnam.3, termios.3, tgamma.3, timeradd.3, tmpnam.3, toupper.3, towlower.3, towupper.3, trunc.3, ttyslot.3, tzset.3, ualarm.3, ulimit.3, undocumented.3, unlocked_stdio.3, updwtmp.3, uselocale.3, usleep.3, wcrtomb.3, wcsdup.3, wcsnrtombs.3, wcsrtombs.3, wcstombs.3, wctob.3, wcwidth.3, wordexp.3, wprintf.3, xcrypt.3, xdr.3, y0.3, cciss.4, console_codes.4, dsp56k.4, fuse.4, hd.4, hpsa.4, initrd.4, intro.4, loop.4, random.4, rtc.4, sd.4, sk98lin.4, st.4, wavelan.4, acct.5, core.5, elf.5, filesystems.5, host.conf.5, hosts.5, locale.5, nologin.5, proc.5, resolv.conf.5, rpc.5, slabinfo.5, utmp.5, aio.7, arp.7, bootparam.7, capabilities.7, cgroup_namespaces.7, cgroups.7, charsets.7, cpuset.7, ddp.7, environ.7, epoll.7, fanotify.7, feature_test_macros.7, futex.7, inode.7, inotify.7, ip.7, ipv6.7, keyrings.7, locale.7, man-pages.7, man.7, math_error.7, mount_namespaces.7, mq_overview.7, namespaces.7, netdevice.7, netlink.7, packet.7, pipe.7, pkeys.7, pthreads.7, pty.7, raw.7, rtld-audit.7, rtnetlink.7, sched.7, session-keyring.7, signal.7, sock_diag.7, socket.7, spufs.7, suffixes.7, tcp.7, udp.7, udplite.7, unicode.7, units.7, unix.7, uri.7, user_namespaces.7, vdso.7, x25.7, xattr.7, iconvconfig.8, ld.so.8, ldconfig.8, sln.8: Update timestamps
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-09-15 12:44:56 +02:00
Michael Kerrisk 9bc87ed07a ctime.3, drand48.3, fmtmsg.3, getnameinfo.3, gsignal.3, strftime.3, strptime.3, cciss.4, console_codes.4, sd.4, sk98lin.4, st.4, proc.5, charsets.7, cpuset.7, pty.7, suffixes.7, udplite.7, unix.7: Use en-dash for ranges
Based on a patch by Bjarni Ingi Gislason.

Reported-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-19 22:01:55 +02:00
Michael Kerrisk c788525612 getrlimit.2, signalfd.2, statfs.2, tee.2, dlopen.3, duplocale.3, ftw.3, get_nprocs.3, mbstowcs.3, posix_spawn.3, strftime.3, full.4, fanotify.7, inotify.7, ip.7, netdevice.7, rtld-audit.7, unix.7: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-19 21:02:23 +02:00
Michael Kerrisk a2b7a14421 sinh.3, sockatmark.3, stdarg.3, stpcpy.3, syslog.3, system.3, tanh.3, termios.3, wctrans.3, wctype.3, wcwidth.3, wordexp.3, cciss.4, fuse.4, initrd.4, loop.4, acct.5, hosts.5, nss.5, operator.7, unix.7: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-19 13:47:27 +02:00
Michael Kerrisk b8302363ed execve.2, ioctl_console.2, ioctl_iflags.2, ioctl_ns.2, ioctl_userfaultfd.2, kcmp.2, kexec_load.2, keyctl.2, link.2, listxattr.2, membarrier.2, memfd_create.2, mmap.2, modify_ldt.2, mprotect.2, msgctl.2, nanosleep.2, open_by_handle_at.2, perf_event_open.2, poll.2, posix_fadvise.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, readdir.2, readv.2, recv.2, recvmmsg.2, request_key.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setscheduler.2, seccomp.2, select.2, select_tut.2, semctl.2, semop.2, send.2, sendmmsg.2, set_thread_area.2, setns.2, shmctl.2, shmget.2, sigaction.2, sigaltstack.2, signal.2, sigwaitinfo.2, stat.2, statfs.2, statx.2, sync_file_range.2, syscall.2, sysctl.2, sysinfo.2, tee.2, timer_create.2, timer_settime.2, timerfd_create.2, unshare.2, userfaultfd.2, ustat.2, utime.2, utimensat.2, vmsplice.2, wait.2, adjtime.3, aio_init.3, backtrace.3, basename.3, bswap.3, btree.3, clock_getcpuclockid.3, cmsg.3, confstr.3, dbopen.3, dl_iterate_phdr.3, dladdr.3, dlinfo.3, dlopen.3, duplocale.3, encrypt.3, end.3, endian.3, err.3, errno.3, ether_aton.3, fgetgrent.3, fgetpwent.3, fmemopen.3, frexp.3, ftime.3, fts.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, getifaddrs.3, getipnodebyname.3, getmntent.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getservent.3, getservent_r.3, getspnam.3, getttyent.3, glob.3, gnu_get_libc_version.3, hash.3, hsearch.3, if_nameindex.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, isalpha.3, makecontext.3, mallinfo.3, malloc_info.3, mallopt.3, matherr.3, mbstowcs.3, mcheck.3, memchr.3, mq_getattr.3, mq_open.3, mq_receive.3, mq_send.3, mtrace.3, newlocale.3, ntp_gettime.3, posix_openpt.3, printf.3, pthread_attr_init.3, pthread_attr_setschedparam.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, pthread_tryjoin_np.3, readdir.3, realpath.3, recno.3, regex.3, rpc.3, scanf.3, sched_getcpu.3, sem_wait.3, setaliasent.3, sigqueue.3, statvfs.3, strcat.3, strcpy.3, strftime.3, strtok.3, strtol.3, strverscmp.3, toupper.3, ttyslot.3, xdr.3, fuse.4, loop.4, rtc.4, st.4, acct.5, core.5, elf.5, slabinfo.5, aio.7, arp.7, capabilities.7, cgroup_namespaces.7, cgroups.7, ddp.7, fanotify.7, feature_test_macros.7, inode.7, inotify.7, ip.7, keyrings.7, locale.7, mount_namespaces.7, namespaces.7, netdevice.7, netlink.7, packet.7, pkeys.7, pthreads.7, sched.7, session-keyring.7, sock_diag.7, socket.7, spufs.7, udplite.7, unix.7, user_namespaces.7, vdso.7, x25.7, ld.so.8: Use consistent markup for code snippets
Change .nf/.fi to .EX/.EE

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-19 13:47:27 +02:00
Michael Kerrisk e646a1bad9 ioctl_console.2, ioctl_getfsmap.2, ioctl_iflags.2, ioctl_list.2, ioctl_ns.2, kcmp.2, kexec_load.2, keyctl.2, link.2, mmap.2, modify_ldt.2, msgctl.2, poll.2, query_module.2, quotactl.2, recv.2, recvmmsg.2, sched_setscheduler.2, seccomp.2, select.2, semctl.2, semop.2, send.2, set_thread_area.2, setns.2, shmctl.2, shmget.2, sigaction.2, sysinfo.2, timer_create.2, timerfd_create.2, uname.2, unshare.2, userfaultfd.2, ustat.2, utimensat.2, vmsplice.2, wait.2, adjtime.3, backtrace.3, bswap.3, btree.3, clock_getcpuclockid.3, confstr.3, dbopen.3, dl_iterate_phdr.3, dlinfo.3, duplocale.3, encrypt.3, end.3, endian.3, err.3, errno.3, fmemopen.3, fopencookie.3, frexp.3, fts.3, ftw.3, getaddrinfo.3, getaddrinfo_a.3, getcontext.3, getgrouplist.3, getifaddrs.3, getipnodebyname.3, getnameinfo.3, getopt.3, getprotoent_r.3, getpwent_r.3, getrpcent.3, getservent_r.3, getttyent.3, getumask.3, glob.3, gnu_get_libc_version.3, hash.3, hsearch.3, inet.3, inet_pton.3, insque.3, isalpha.3, makecontext.3, mallopt.3, mbstowcs.3, mcheck.3, memchr.3, mq_getattr.3, mq_open.3, mtrace.3, newlocale.3, ntp_gettime.3, offsetof.3, posix_openpt.3, printf.3, pthread_setname_np.3, pthread_setschedparam.3, rpc.3, scanf.3, sched_getcpu.3, sem_wait.3, setaliasent.3, sigqueue.3, sigvec.3, stdarg.3, strcat.3, strcpy.3, strftime.3, strtol.3, toupper.3, ttyslot.3, fuse.4, loop.4, st.4, elf.5, cgroup_namespaces.7, cgroups.7, feature_test_macros.7, inode.7, inotify.7, keyrings.7, man-pages.7, math_error.7, mount_namespaces.7, mq_overview.7, pthreads.7, sched.7, session-keyring.7, udplite.7, unix.7, vdso.7: Use consistent markup for code snippets
The preferred form is

    .PP/.IP
    .in +4n
    .EX
    <code>
    .EE
    .in
    .PP/.IP

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-19 13:47:26 +02:00
Michael Kerrisk e7d0bb4715 memusage.1, clone.2, eventfd.2, futex.2, getdents.2, ioctl_fat.2, ioctl_ns.2, kcmp.2, keyctl.2, mmap.2, mprotect.2, msgop.2, recvmmsg.2, request_key.2, sched_setaffinity.2, seccomp.2, setns.2, tee.2, timer_create.2, timerfd_create.2, unshare.2, userfaultfd.2, wait.2, __ppc_get_timebase.3, backtrace.3, bswap.3, clock_getcpuclockid.3, dl_iterate_phdr.3, dlinfo.3, dlopen.3, duplocale.3, end.3, endian.3, fmemopen.3, fopencookie.3, frexp.3, ftw.3, getdate.3, getgrouplist.3, getifaddrs.3, getprotoent_r.3, getservent_r.3, gnu_get_libc_version.3, if_nameindex.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, makecontext.3, mallinfo.3, malloc_info.3, mallopt.3, matherr.3, mbstowcs.3, mcheck.3, mq_getattr.3, mq_notify.3, newlocale.3, offsetof.3, posix_spawn.3, pthread_attr_init.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, scandir.3, sem_wait.3, strcat.3, strftime.3, strtok.3, strtol.3, strverscmp.3, loop.4, core.5, aio.7, fanotify.7, feature_test_macros.7, inotify.7, pkeys.7, unix.7, user_namespaces.7: Use .EX/.EE for EXAMPLE programs
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 10:44:33 +02:00
Michael Kerrisk 5711c04f8f environ.7, epoll.7, feature_test_macros.7, futex.7, ip.7, ipv6.7, locale.7, man-pages.7, man.7, math_error.7, netdevice.7, netlink.7, packet.7, raw.7, rtld-audit.7, rtnetlink.7, sock_diag.7, socket.7, tcp.7, udp.7, udplite.7, unix.7, uri.7, vdso.7: Formatting fix: replace blank lines with .PP/.IP
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 03:06:54 +02:00
Michael Kerrisk f90f031e0f _exit.2, accept.2, chmod.2, dup.2, getgroups.2, keyctl.2, link.2, mkdir.2, mknod.2, pipe.2, poll.2, reboot.2, rename.2, select.2, select_tut.2, stat.2, symlink.2, unlink.2, __ppc_get_timebase.3, abs.3, bzero.3, crypt.3, dbopen.3, dl_iterate_phdr.3, dlinfo.3, dlsym.3, duplocale.3, encrypt.3, err.3, ffs.3, fpurge.3, ftw.3, getdate.3, gethostbyname.3, getlogin.3, getmntent.3, getpwent_r.3, getpwnam.3, getspnam.3, inet_pton.3, insque.3, isfdtype.3, mallinfo.3, mallopt.3, matherr.3, mcheck.3, mempcpy.3, mkfifo.3, mq_getattr.3, newlocale.3, open_memstream.3, openpty.3, perror.3, posix_memalign.3, posix_spawn.3, printf.3, pthread_attr_init.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setaffinity_np.3, pthread_setschedparam.3, pthread_sigmask.3, pthread_sigqueue.3, regex.3, resolver.3, rpmatch.3, rtnetlink.3, scanf.3, setbuf.3, strchr.3, strfromd.3, strverscmp.3, termios.3, tsearch.3, unlocked_stdio.3, updwtmp.3, netlink.7, rtld-audit.7, sock_diag.7, unix.7: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-15 17:44:09 +02:00
Michael Kerrisk 06b8a13be7 unix.7: wfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-03-18 20:42:58 +01:00
Michael Kerrisk 31a1b45ece add_key.2, execve.2, fork.2, fsync.2, getrandom.2, getrlimit.2, getxattr.2, inotify_add_watch.2, ioctl.2, ioctl_fat.2, kcmp.2, keyctl.2, link.2, listxattr.2, lseek.2, madvise.2, mincore.2, mlock.2, nanosleep.2, poll.2, posix_fadvise.2, read.2, readv.2, recv.2, request_key.2, select.2, send.2, setxattr.2, sigaction.2, stat.2, statfs.2, syscall.2, tkill.2, truncate.2, unlink.2, vfork.2, write.2, __ppc_set_ppr_med.3, aio_suspend.3, backtrace.3, bcmp.3, bcopy.3, bzero.3, exec.3, fopen.3, fts.3, ftw.3, getline.3, getmntent.3, getopt.3, memccpy.3, memchr.3, memcmp.3, memcpy.3, memfrob.3, memmem.3, memmove.3, memset.3, random.3, random_r.3, resolver.3, scandir.3, scanf.3, sem_post.3, sem_wait.3, setjmp.3, sleep.3, strerror.3, strverscmp.3, system.3, random.4, core.5, intro.5, resolv.conf.5, slabinfo.5, environ.7, ip.7, keyrings.7, man.7, persistent-keyring.7, pipe.7, process-keyring.7, random.7, session-keyring.7, signal-safety.7, signal.7, thread-keyring.7, unix.7, user-keyring.7, user-session-keyring.7, ld.so.8: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-03-13 21:14:49 +01:00
Michael Kerrisk c9a39feadc unix.7: Since Linux 3.4, UNIX domain sockets support MSG_TRUNC
This was correctly noted in recv(2), but the unix(7) page
was not correspondingly updated for the Linux 3.4 change.

Reported-by: Sergey Polovko <sergey@polovko.me>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-01-16 09:57:12 +13:00
Jakub Wilk 4529d4e536 unix.7: tfix
Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-01-04 15:27:41 +13:00
Michael Kerrisk 70fdcbc20a unix.7: Note that the ETOOMANYREFS diagnostic may be backported to older kernels
Reported-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-12-17 10:33:55 +01:00