Use `Er' variable to define first column width in ERRORS section. It was

initially suggested by mdoc(7) style, but was broken over the years

lib/libc/sys/accept.2

@@ -165,7 +165,7 @@ integer that is a descriptor for the accepted socket.
 The
 .Fn accept
 will fail if:
-.Bl -tag -width EWOULDBLOCK
+.Bl -tag -width Er
 .It Bq Er EBADF
 The descriptor is invalid.
 .It Bq Er EINTR

lib/libc/sys/bind.2

@@ -95,7 +95,7 @@ further specified in the global
 The
 .Fn bind
 call will fail if:
-.Bl -tag -width EADDRNOTAVA
+.Bl -tag -width Er
 .It Bq Er EAGAIN
 Kernel resources to complete the request are 
 temporarily unavilable.

lib/libc/sys/brk.2

@@ -122,7 +122,7 @@ or
 .Fn sbrk
 will fail and no additional memory will be allocated if
 one of the following are true:
-.Bl -tag -width [ENOMEM]
+.Bl -tag -width Er
 .It Bq Er ENOMEM
 The limit, as set by
 .Xr setrlimit 2 ,

lib/libc/sys/chroot.2

@@ -97,7 +97,7 @@ is set to indicate an error.
 .Sh ERRORS
 .Fn Chroot
 will fail and the root directory will be unchanged if:
-.Bl -tag -width [ENOTDIR]
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path name is not a directory.
 .It Bq Er EPERM

lib/libc/sys/clock_gettime.2

@@ -101,7 +101,7 @@ case an error code is stored into the global variable
 .Sh ERRORS
 The following error codes may be set in
 .Va errno :
-.Bl -tag -width [EFAULT]
+.Bl -tag -width Er
 .It Bq Er EINVAL
 The
 .Fa clock_id

lib/libc/sys/connect.2

@@ -105,7 +105,7 @@ code is stored in
 The
 .Fn connect
 call fails if:
-.Bl -tag -width EADDRNOTAVAILABB
+.Bl -tag -width Er
 .It Bq Er EBADF
 .Fa s
 is not a valid descriptor.

lib/libc/sys/execve.2

@@ -220,7 +220,7 @@ is set to indicate the error.
 .Sh ERRORS
 .Fn Execve
 will fail and return to the calling process if:
-.Bl -tag -width [ENAMETOOLONG]
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/flock.2

@@ -143,7 +143,7 @@ the global location
 The
 .Fn flock
 call fails if:
-.Bl -tag -width EWOULDBLOCKAA
+.Bl -tag -width Er
 .It Bq Er EWOULDBLOCK
 The file is locked and the
 .Dv LOCK_NB

lib/libc/sys/fork.2

@@ -88,7 +88,7 @@ is set to indicate the error.
 .Sh ERRORS
 .Fn Fork
 will fail and no child process will be created if:
-.Bl -tag -width [EAGAIN]
+.Bl -tag -width Er
 .It Bq Er EAGAIN
 The system-imposed limit on the total
 number of processes under execution would be exceeded.

lib/libc/sys/getpeername.2

@@ -84,7 +84,7 @@ unlocks
 A 0 is returned if the call succeeds, -1 if it fails.
 .Sh ERRORS
 The call succeeds unless:
-.Bl -tag -width ENOTSOCKAA
+.Bl -tag -width Er
 .It Bq Er EBADF
 The argument
 .Fa s

lib/libc/sys/getsockname.2

@@ -82,7 +82,7 @@ unlocks
 A 0 is returned if the call succeeds, -1 if it fails.
 .Sh ERRORS
 The call succeeds unless:
-.Bl -tag -width ENOTSOCKAA
+.Bl -tag -width Er
 .It Bq Er EBADF
 The argument
 .Fa s

lib/libc/sys/getsockopt.2

@@ -362,7 +362,7 @@ unlocks
 A 0 is returned if the call succeeds, -1 if it fails.
 .Sh ERRORS
 The call succeeds unless:
-.Bl -tag -width ENOPROTOOPTAA
+.Bl -tag -width Er
 .It Bq Er EBADF
 The argument
 .Fa s

lib/libc/sys/gettimeofday.2

@@ -115,7 +115,7 @@ case an error code is stored into the global variable
 .Sh ERRORS
 The following error codes may be set in
 .Va errno :
-.Bl -tag -width [EFAULT]
+.Bl -tag -width Er
 .It Bq Er EFAULT
 An argument address referenced invalid memory.
 .It Bq Er EPERM

lib/libc/sys/ioctl.2

@@ -114,7 +114,7 @@ is set to indicate the error.
 .Sh ERRORS
 .Fn Ioctl
 will fail if:
-.Bl -tag -width [ENOTTY]
+.Bl -tag -width Er
 .It Bq Er EBADF
 .Fa d
 is not a valid descriptor.

lib/libc/sys/jail.2

@@ -77,7 +77,7 @@ set for the prison for jailed processes.
 .Sh ERRORS
 .Fn jail
 will fail if:
-.Bl -tag -width EWOULDBLOCK
+.Bl -tag -width Er
 .It Bq Er EINVAL
 The version number of the argument is not correct.
 .El

lib/libc/sys/kill.2

@@ -110,7 +110,7 @@ is set to indicate the error.
 .Sh ERRORS
 .Fn Kill
 will fail and no signal will be sent if:
-.Bl -tag -width [EINVAL]
+.Bl -tag -width Er
 .It Bq Er EINVAL
 .Fa Sig
 is not a valid signal number.

lib/libc/sys/ktrace.2

@@ -130,7 +130,7 @@ bytes of a
 .Nm ktr_type
 record.
 The type specific records are defined in the
-.Pa <sys/ktrace.h>
+.Aq Pa sys/ktrace.h
 include file.
 .Sh RETURN VALUES
 On successful completion a value of 0 is returned.
@@ -140,7 +140,7 @@ is set to show the error.
 .Sh ERRORS
 .Fn Ktrace
 will fail if:
-.Bl -tag -width ENAMETOOLONGAA
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/link.2

@@ -87,7 +87,7 @@ is set to indicate the error.
 .Sh ERRORS
 .Fn Link
 will fail and no link will be created if:
-.Bl -tag -width Ar
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of either path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/listen.2

@@ -112,7 +112,7 @@ A 0 return value indicates success; -1 indicates an error.
 .Sh ERRORS
 .Fn Listen 
 will fail if:
-.Bl -tag -width [EOPNOTSUPP]
+.Bl -tag -width Er
 .It Bq Er EBADF
 The argument
 .Fa s

lib/libc/sys/lseek.2

@@ -114,7 +114,7 @@ the error.
 .Sh ERRORS
 .Fn Lseek
 will fail and the file position pointer will remain unchanged if:
-.Bl -tag -width [EINVAL]
+.Bl -tag -width Er
 .It Bq Er EBADF
 .Em Fildes
 is not an open file descriptor.

lib/libc/sys/mkdir.2

@@ -64,7 +64,7 @@ indicates an error, and an error code is stored in
 .Sh ERRORS
 .Fn Mkdir
 will fail and no directory will be created if:
-.Bl -tag -width ENAMETOOLO
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/mkfifo.2

@@ -66,7 +66,7 @@ indicates an error, and an error code is stored in
 .Sh ERRORS
 .Fn Mkfifo
 will fail and no fifo will be created if:
-.Bl -tag -width ENAMETOOLO
+.Bl -tag -width Er
 .It Bq Er ENOTSUPP
 The kernel has not been configured to support fifo's.
 .It Bq Er ENOTDIR

lib/libc/sys/mount.2

@@ -186,7 +186,7 @@ is set to indicate the error.
 The
 .Fn mount
 function will fail when one of the following occurs:
-.Bl -tag -width [ENOTBLK]
+.Bl -tag -width Er
 .It Bq Er EPERM
 The caller is not the super-user.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/nfssvc.2

@@ -221,7 +221,7 @@ Otherwise, -1 is returned and the global variable
 .Va errno
 is set to specify the error.
 .Sh ERRORS
-.Bl -tag -width [ENEEDAUTH]
+.Bl -tag -width Er
 .It Bq Er ENEEDAUTH
 This special error value
 is really used for authentication support, particularly Kerberos,

lib/libc/sys/pipe.2

@@ -98,7 +98,7 @@ error.
 The
 .Fn pipe
 call will fail if:
-.Bl -tag -width [EMFILE]
+.Bl -tag -width Er
 .It Bq Er EMFILE
 Too many descriptors are active.
 .It Bq Er ENFILE

lib/libc/sys/ptrace.2

@@ -234,7 +234,7 @@ can be set to 0 before the call and checked afterwards.
 The
 .Fn ptrace
 function may fail if:
-.Bl -tag -width 4n
+.Bl -tag -width Er
 .It Bq Er ESRCH
 .Bl -bullet -compact
 .It

lib/libc/sys/quotactl.2

@@ -159,7 +159,7 @@ indicates the reason for the failure.
 A
 .Fn quotactl
 call will fail if:
-.Bl -tag -width ENAMETOOLONGAA
+.Bl -tag -width Er
 .It Bq Er EOPNOTSUPP
 The kernel has not been compiled with the
 .Dv QUOTA

lib/libc/sys/readlink.2

@@ -66,7 +66,7 @@ code in the global variable
 .Sh ERRORS
 .Fn Readlink
 will fail if:
-.Bl -tag -width ENAMETOOLONG
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/recv.2

@@ -256,7 +256,7 @@ These calls return the number of bytes received, or -1
 if an error occurred.
 .Sh ERRORS
 The calls fail if:
-.Bl -tag -width ENOTCONNAA
+.Bl -tag -width Er
 .It Bq Er EBADF
 The argument
 .Fa s

lib/libc/sys/rename.2

@@ -107,7 +107,7 @@ indicates the reason for the failure.
 .Fn Rename
 will fail and neither of the argument files will be
 affected if:
-.Bl -tag -width ENAMETOOLONG
+.Bl -tag -width Er
 .It Bq Er ENAMETOOLONG
 A component of either pathname exceeded 255 characters,
 or the entire length of either path name exceeded 1023 characters.

lib/libc/sys/rfork.2

@@ -106,7 +106,7 @@ is set to indicate the error.
 .Sh ERRORS
 .Fn Rfork
 will fail and no child process will be created if:
-.Bl -tag -width [EAGAIN]
+.Bl -tag -width Er
 .It Bq Er EAGAIN
 The system-imposed limit on the total
 number of processes under execution would be exceeded.

lib/libc/sys/rmdir.2

@@ -60,7 +60,7 @@ returned and an error code is stored in the global location
 .Va errno .
 .Sh ERRORS
 The named file is removed unless:
-.Bl -tag -width [ENAMETOOLONG]
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/sched_get_priority_max.2

@@ -95,7 +95,7 @@ to indicate the error.
 On failure
 .Va errno
 will be set to the corresponding value:
-.Bl -tag -width [EFAULT]
+.Bl -tag -width Er
 .It Bq Er EINVAL
 The value of the
 .Fa policy

lib/libc/sys/sched_setparam.2

@@ -142,7 +142,7 @@ to indicate the error.
 On failure
 .Va errno
 will be set to the corresponding value:
-.Bl -tag -width [EFAULT]
+.Bl -tag -width Er
 .It Bq Er ENOSYS
 The system is not configured to support this functionality.
 .It Bq Er EPERM

lib/libc/sys/sched_setscheduler.2

@@ -137,7 +137,7 @@ to indicate the error.
 On failure
 .Va errno
 will be set to the corresponding value:
-.Bl -tag -width [EFAULT]
+.Bl -tag -width Er
 .It Bq Er ENOSYS
 The system is not configured to support this functionality.
 .It Bq Er EPERM

lib/libc/sys/sched_yield.2

@@ -51,7 +51,7 @@ to indicate the error.
 On failure
 .Va errno
 will be set to the corresponding value:
-.Bl -tag -width [EFAULT]
+.Bl -tag -width Er
 .It Bq Er ENOSYS
 The system is not configured to support this functionality.
 .Sh STANDARDS

lib/libc/sys/setpgid.2

@@ -69,7 +69,7 @@ indicates the reason.
 .Sh ERRORS
 .Fn Setpgid
 will fail and the process group will not be altered if:
-.Bl -tag -width indent
+.Bl -tag -width Er
 .It Bq Er ESRCH
 The requested process does not exist.
 .It Bq Er EPERM

lib/libc/sys/setregid.2

@@ -76,7 +76,7 @@ a value of -1 is returned and
 .Va errno
 is set to indicate the error.
 .Sh ERRORS
-.Bl -tag -width [EPERM]
+.Bl -tag -width Er
 .It Bq Er EPERM
 The current process is not the super-user and a change
 other than changing the effective group-id to the real group-id

lib/libc/sys/setresuid.2

@@ -58,7 +58,7 @@ and the global variable
 .Va errno
 is set to indicate the error.
 .Sh ERRORS
-.Bl -tag -width indent
+.Bl -tag -width Er
 .It Er EPERM
 The calling process was not privileged
 and tried to change one or more IDs to a value

lib/libc/sys/setreuid.2

@@ -75,7 +75,7 @@ a value of -1 is returned and
 .Va errno
 is set to indicate the error.
 .Sh ERRORS
-.Bl -tag -width [EPERM]
+.Bl -tag -width Er
 .It Bq Er EPERM
 The current process is not the super-user and a change
 other than changing the effective user-id to the real user-id

lib/libc/sys/shutdown.2

@@ -71,7 +71,7 @@ further sends and receives will be disallowed.
 A 0 is returned if the call succeeds, -1 if it fails.
 .Sh ERRORS
 The call succeeds unless:
-.Bl -tag -width ENOTCONNAA
+.Bl -tag -width Er
 .It Bq Er EBADF
 .Fa S
 is not a valid descriptor.

lib/libc/sys/sigaltstack.2

@@ -141,7 +141,7 @@ is set to indicate the error.
 .Fn Sigaltstack
 will fail and the signal stack context will remain unchanged
 if one of the following occurs.
-.Bl -tag -width [ENOMEM]
+.Bl -tag -width Er
 .It Bq Er EFAULT
 Either
 .Fa ss

lib/libc/sys/sigprocmask.2

@@ -105,7 +105,7 @@ The
 .Fn sigprocmask
 call will fail and the signal mask will be unchanged if one
 of the following occurs:
-.Bl -tag -width Bq Er EINVAL
+.Bl -tag -width Er
 .It Bq Er EINVAL
 .Fa how
 has a value other than those listed here.

lib/libc/sys/sigreturn.2

@@ -96,7 +96,7 @@ is set to indicate the error.
 .Fn Sigreturn
 will fail and the process context will remain unchanged
 if one of the following occurs.
-.Bl -tag -width [EINVAL]
+.Bl -tag -width Er
 .It Bq Er EFAULT
 .Fa Scp
 points to memory that is not a valid part of the process

lib/libc/sys/socket.2

@@ -251,7 +251,7 @@ value is a descriptor referencing the socket.
 The
 .Fn socket
 call fails if:
-.Bl -tag -width EPROTONOPSUPPORTA
+.Bl -tag -width Er
 .It Bq Er EPROTONOSUPPORT
 The protocol type or the specified protocol is not supported
 within this domain.

lib/libc/sys/socketpair.2

@@ -65,7 +65,7 @@ The two sockets are indistinguishable.
 A 0 is returned if the call succeeds, -1 if it fails.
 .Sh ERRORS
 The call succeeds unless:
-.Bl -tag -width EPROTONOSUPPORTA
+.Bl -tag -width Er
 .It Bq Er EMFILE
 Too many descriptors are in use by this process.
 .It Bq Er EAFNOSUPPORT

lib/libc/sys/stat.2

@@ -220,7 +220,7 @@ fields.
 and
 .Fn lstat
 will fail if:
-.Bl -tag -width ENAMETOOLONGAA
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/statfs.2

@@ -131,7 +131,7 @@ is set to indicate the error.
 .Sh ERRORS
 .Fn Statfs
 fails if one or more of the following are true:
-.Bl -tag -width ENAMETOOLONGA
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix of
 .Fa Path

lib/libc/sys/swapon.2

@@ -62,7 +62,7 @@ is set to indicate the error.
 .Sh ERRORS
 .Fn Swapon
 succeeds unless:
-.Bl -tag -width ENAMETOOLONG
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/symlink.2

@@ -64,7 +64,7 @@ If an error occurs, the error code is stored in
 and a -1 value is returned.
 .Sh ERRORS
 The symbolic link succeeds unless:
-.Bl -tag -width ENAMETOO
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the
 .Fa name2

lib/libc/sys/truncate.2

@@ -72,7 +72,7 @@ specifies the error.
 .Sh ERRORS
 .Fn Truncate
 succeeds unless:
-.Bl -tag -width [ENOTDIR]
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/undelete.2

@@ -69,7 +69,7 @@ is set to indicate the error.
 The
 .Fn undelete
 succeeds unless:
-.Bl -tag -width ENAMETOOLONGAA
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG

lib/libc/sys/unlink.2

@@ -70,7 +70,7 @@ is set to indicate the error.
 The
 .Fn unlink
 succeeds unless:
-.Bl -tag -width ENAMETOOLONGAA
+.Bl -tag -width Er
 .It Bq Er ENOTDIR
 A component of the path prefix is not a directory.
 .It Bq Er ENAMETOOLONG