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124
usr.man/man2/getlogin.2
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124
usr.man/man2/getlogin.2
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@ -0,0 +1,124 @@
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.\" Copyright (c) 1989, 1991, 1993
|
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|
.\" The Regents of the University of California. All rights reserved.
|
||||||
|
.\"
|
||||||
|
.\" Redistribution and use in source and binary forms, with or without
|
||||||
|
.\" modification, are permitted provided that the following conditions
|
||||||
|
.\" are met:
|
||||||
|
.\" 1. Redistributions of source code must retain the above copyright
|
||||||
|
.\" notice, this list of conditions and the following disclaimer.
|
||||||
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
.\" notice, this list of conditions and the following disclaimer in the
|
||||||
|
.\" documentation and/or other materials provided with the distribution.
|
||||||
|
.\" 3. All advertising materials mentioning features or use of this software
|
||||||
|
.\" must display the following acknowledgement:
|
||||||
|
.\" This product includes software developed by the University of
|
||||||
|
.\" California, Berkeley and its contributors.
|
||||||
|
.\" 4. Neither the name of the University nor the names of its contributors
|
||||||
|
.\" may be used to endorse or promote products derived from this software
|
||||||
|
.\" without specific prior written permission.
|
||||||
|
.\"
|
||||||
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||||
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
.\" SUCH DAMAGE.
|
||||||
|
.\"
|
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|
.\" @(#)getlogin.2 8.1 (Berkeley) 6/9/93
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|
.\"
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|
.TH GETLOGIN 2 "17 September 1997" GNO "System Calls"
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|
.SH NAME
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|
.BR getlogin ,
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|
.BR setlogin
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|
\- get/set login name
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||||||
|
.SH SYNOPSIS
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||||||
|
#include <unistd.h>
|
||||||
|
.sp 1
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||||||
|
char *\fBgetlogin\fR (void);
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|
.sp 1
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|
int \fBsetlogin\fR (const char *\fIname\fR);
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|
.SH DESCRIPTION
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||||||
|
The
|
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|
.BR getlogin
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|
routine
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|
returns the login name of the user associated with the current session,
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|
as previously set by
|
||||||
|
.BR setlogin .
|
||||||
|
The name is normally associated with a login shell
|
||||||
|
at the time a session is created,
|
||||||
|
and is inherited by all processes descended from the login shell.
|
||||||
|
(This is true even if some of those processes assume another user ID,
|
||||||
|
for example when
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||||||
|
.BR su (1)
|
||||||
|
is used.)
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||||||
|
.LP
|
||||||
|
.BR Setlogin
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||||||
|
sets the login name of the user associated with the current session to
|
||||||
|
.IR name .
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|
This call is restricted to the super-user, and
|
||||||
|
is normally used only when a new session is being created on behalf
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|
of the named user
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||||||
|
(for example, at login time, or when a remote shell is invoked).
|
||||||
|
.SH RETURN VALUES
|
||||||
|
If a call to
|
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|
.BR getlogin
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||||||
|
succeeds, it returns a pointer to a null-terminated string in a static buffer.
|
||||||
|
If the name has not been set, it returns
|
||||||
|
.BR NULL .
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||||||
|
If a call to
|
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|
.BR setlogin
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||||||
|
succeeds, a value of 0 is returned. If
|
||||||
|
.BR setlogin
|
||||||
|
fails, a value of -1 is returned and an error code is
|
||||||
|
placed in the global location
|
||||||
|
.IR errno .
|
||||||
|
.SH ERRORS
|
||||||
|
The following errors may be returned by these calls:
|
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|
.RS
|
||||||
|
.IP \fBEFAULT\fR
|
||||||
|
The
|
||||||
|
.I name
|
||||||
|
parameter gave an
|
||||||
|
invalid address.
|
||||||
|
.IP \fBEINVAL\fR
|
||||||
|
The
|
||||||
|
.I name
|
||||||
|
parameter
|
||||||
|
pointed to a string that was too long.
|
||||||
|
Login names are limited to
|
||||||
|
.BR MAXLOGNAME
|
||||||
|
(from
|
||||||
|
.BR <sys/param.h> )
|
||||||
|
characters, currently 12.
|
||||||
|
.IP \fBEPERM\fR
|
||||||
|
The caller tried to set the login name and was not the super-user.
|
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|
.RE
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||||||
|
.SH SEE ALSO
|
||||||
|
.BR setsid (2)
|
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|
.SH BUGS
|
||||||
|
Login names are limited in length by
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|
.BR setlogin .
|
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|
However, lower limits are placed on login names elsewhere in the system
|
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|
.RB ( UT_NAMESIZE
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|
in
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|
.BR <utmp.h> ) .
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|
.LP
|
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|
In earlier versions of the system,
|
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|
.BR getlogin
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|
failed unless the process was associated with a login terminal.
|
||||||
|
The current implementation (using
|
||||||
|
.BR setlogin )
|
||||||
|
allows getlogin to succeed even when the process has no controlling terminal.
|
||||||
|
In earlier versions of the system, the value returned by
|
||||||
|
.BR getlogin
|
||||||
|
could not be trusted without checking the user ID.
|
||||||
|
Portable programs should probably still make this check.
|
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|
.SH HISTORY
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||||||
|
The
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|
.BR getlogin
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|
function first appeared in 4.4BSD.
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53
usr.man/man3/fsettext.3
Normal file
53
usr.man/man3/fsettext.3
Normal file
@ -0,0 +1,53 @@
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|||||||
|
.\"
|
||||||
|
.\" Macros for converting newline translation mode of stdio streams.
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|
.\" Devin Reade, 1997
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|
.\"
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|
.\" $Id: fsettext.3,v 1.1 1997/09/19 15:47:54 gdr Exp $
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||||||
|
.\"
|
||||||
|
.TH FSETTEXT 3 "15 September 1997" GNO "Library Routines"
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||||||
|
.SH NAME
|
||||||
|
.BR fsettext ,
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||||||
|
.BR fsetbinary
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||||||
|
\- set the newline translation mode for a stdio stream.
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||||||
|
.SH SYNOPSIS
|
||||||
|
#include <stdio.h>
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||||||
|
.sp 1
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||||||
|
void \fBfsettext\fR (FILE *\fIfp\fR);
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||||||
|
.br
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||||||
|
void \fBfsetbinary\fR (FILE *\fIfp\fR);
|
||||||
|
.SH DESCRIPTION
|
||||||
|
The FILE struct for each stdio stream contains information as to whether
|
||||||
|
or not newline translation (carrige return to linefeed and back) will occur
|
||||||
|
for that stream. This translation mode is set when the stream is opened
|
||||||
|
by passing (or not passing) the "\fBb\fR" flag modifier to
|
||||||
|
.BR fopen (3),
|
||||||
|
.BR fdopen (3),
|
||||||
|
or
|
||||||
|
.BR freopen (3).
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||||||
|
.LP
|
||||||
|
The stdio streams that are already open upon entry into the
|
||||||
|
.BR main
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||||||
|
routine
|
||||||
|
.RB ( stdin ,
|
||||||
|
.BR stdout ,
|
||||||
|
and
|
||||||
|
.BR stderr )
|
||||||
|
by default do newline translations. The
|
||||||
|
.BR fsetbinary
|
||||||
|
macro allows these translations to be disabled. The
|
||||||
|
.BR fsettext
|
||||||
|
macro allows these translations to be reenabled. These macros are not
|
||||||
|
necessary and should not be used for any other stream pointers.
|
||||||
|
.LP
|
||||||
|
These macros must be used before any I/O is performed on the associated
|
||||||
|
stream. If I/O has already been performed, the results are undefined.
|
||||||
|
.SH STANDARDS
|
||||||
|
.BR fsetbinary
|
||||||
|
and
|
||||||
|
.BR fsettext
|
||||||
|
are non-standard routines, and should not be used for programs intended
|
||||||
|
to be ported to other platforms.
|
||||||
|
.SH SEE ALSO
|
||||||
|
.BR fflush (3),
|
||||||
|
.BR fopen (3),
|
||||||
|
.BR stdio (3)
|
||||||
161
usr.man/man3/funopen.3
Normal file
161
usr.man/man3/funopen.3
Normal file
@ -0,0 +1,161 @@
|
|||||||
|
.\" Copyright (c) 1990, 1991, 1993
|
||||||
|
.\" The Regents of the University of California. All rights reserved.
|
||||||
|
.\"
|
||||||
|
.\" This code is derived from software contributed to Berkeley by
|
||||||
|
.\" Chris Torek.
|
||||||
|
.\" Redistribution and use in source and binary forms, with or without
|
||||||
|
.\" modification, are permitted provided that the following conditions
|
||||||
|
.\" are met:
|
||||||
|
.\" 1. Redistributions of source code must retain the above copyright
|
||||||
|
.\" notice, this list of conditions and the following disclaimer.
|
||||||
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
.\" notice, this list of conditions and the following disclaimer in the
|
||||||
|
.\" documentation and/or other materials provided with the distribution.
|
||||||
|
.\" 3. All advertising materials mentioning features or use of this software
|
||||||
|
.\" must display the following acknowledgement:
|
||||||
|
.\" This product includes software developed by the University of
|
||||||
|
.\" California, Berkeley and its contributors.
|
||||||
|
.\" 4. Neither the name of the University nor the names of its contributors
|
||||||
|
.\" may be used to endorse or promote products derived from this software
|
||||||
|
.\" without specific prior written permission.
|
||||||
|
.\"
|
||||||
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||||
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
.\" SUCH DAMAGE.
|
||||||
|
.\"
|
||||||
|
.\" @(#)funopen.3 8.1 (Berkeley) 6/9/93
|
||||||
|
.\"
|
||||||
|
.TH FUNOPEN 3 "17 September 1997" GNO "Library Routines"
|
||||||
|
.SH NAME
|
||||||
|
.BR funopen ,
|
||||||
|
.BR fropen ,
|
||||||
|
.BR fwopen
|
||||||
|
\- open a stream
|
||||||
|
.SH SYNOPSIS
|
||||||
|
#include <stdio.h>
|
||||||
|
.sp 1
|
||||||
|
FILE *\fBfunopen\fR (void *\fIcookie\fR, int (*\fIreadfn\fR)(void *, char *, int), int (*\fIwritefn\fR)(void *, const char *, int), fpos_t (*\fIseekfn\fR)(void *, fpos_t, int), int (*\fIclosefn\fR)(void *));
|
||||||
|
.sp 1
|
||||||
|
FILE *\fBfropen\fR (void *\fIcookie\fR, int (*\fIreadfn\fR)(void *, char *, int));
|
||||||
|
.sp 1
|
||||||
|
FILE *\fBfwopen\fR (void *\fIcookie\fR, int (*\fIwritefn\fR)(void *, char *, int));
|
||||||
|
.SH DESCRIPTION
|
||||||
|
The
|
||||||
|
.BR funopen
|
||||||
|
function
|
||||||
|
associates a stream with up to four I/O functions.
|
||||||
|
Either
|
||||||
|
.I readfn
|
||||||
|
or
|
||||||
|
.I writefn
|
||||||
|
must be specified;
|
||||||
|
the others can be given as an appropriately-typed
|
||||||
|
.BR NULL
|
||||||
|
pointer.
|
||||||
|
These I/O
|
||||||
|
functions will be used to read, write, seek and
|
||||||
|
close the new stream.
|
||||||
|
.LP
|
||||||
|
In general, omitting a function means that any attempt to perform the
|
||||||
|
associated operation on the resulting stream will fail.
|
||||||
|
If the close function is omitted, closing the stream will flush
|
||||||
|
any buffered output and then succeed.
|
||||||
|
.LP
|
||||||
|
The calling conventions of
|
||||||
|
.IR readfn ,
|
||||||
|
.IR writefn ,
|
||||||
|
.I seekfn
|
||||||
|
and
|
||||||
|
.I closefn
|
||||||
|
must match those, respectively, of
|
||||||
|
.BR read (2),
|
||||||
|
.BR write (2),
|
||||||
|
.BR seek (2),
|
||||||
|
and
|
||||||
|
.BR close (2)
|
||||||
|
with the single exception that they are passed the
|
||||||
|
.I cookie
|
||||||
|
argument specified to
|
||||||
|
.BR funopen
|
||||||
|
in place of the traditional file descriptor argument.
|
||||||
|
.LP
|
||||||
|
Read and write I/O
|
||||||
|
functions are allowed to change the underlying buffer
|
||||||
|
on fully buffered or line buffered streams by calling
|
||||||
|
.BR setvbuf (3).
|
||||||
|
They are also not required to completely fill or empty the buffer.
|
||||||
|
They are not, however, allowed to change streams from unbuffered to buffered
|
||||||
|
or to change the state of the line buffering flag.
|
||||||
|
They must also be prepared to have read or write calls occur on buffers other
|
||||||
|
than the one most recently specified.
|
||||||
|
.LP
|
||||||
|
All user I/O
|
||||||
|
functions can report an error by returning \-1.
|
||||||
|
Additionally, all of the functions should set the external variable
|
||||||
|
.IR errno
|
||||||
|
appropriately if an error occurs.
|
||||||
|
.LP
|
||||||
|
An error on
|
||||||
|
.BR closefn
|
||||||
|
does not keep the stream open.
|
||||||
|
.LP
|
||||||
|
As a convenience, the include file
|
||||||
|
.BR <stdio.h>
|
||||||
|
defines the macros
|
||||||
|
.BR fropen
|
||||||
|
and
|
||||||
|
.BR fwopen
|
||||||
|
as calls to
|
||||||
|
.BR funopen
|
||||||
|
with only a read or write function specified.
|
||||||
|
.SH RETURN VALUES
|
||||||
|
Upon successful completion,
|
||||||
|
.BR funopen
|
||||||
|
returns a
|
||||||
|
.BR FILE
|
||||||
|
pointer.
|
||||||
|
Otherwise,
|
||||||
|
.BR NULL
|
||||||
|
is returned and the global variable
|
||||||
|
.IR errno
|
||||||
|
is set to indicate the error.
|
||||||
|
.SH ERRORS
|
||||||
|
.RS
|
||||||
|
.IP \fBEINVAL\fR
|
||||||
|
The
|
||||||
|
.BR funopen
|
||||||
|
function
|
||||||
|
was called without either a read or write function.
|
||||||
|
The
|
||||||
|
.BR funopen
|
||||||
|
function
|
||||||
|
may also fail and set
|
||||||
|
.IR errno
|
||||||
|
for any of the errors
|
||||||
|
specified for the routine
|
||||||
|
.BR malloc (3).
|
||||||
|
.RE
|
||||||
|
.SH SEE ALSO
|
||||||
|
.BR fcntl (2),
|
||||||
|
.BR open (2),
|
||||||
|
.BR fclose (3),
|
||||||
|
.BR fopen (3),
|
||||||
|
.BR fseek (3),
|
||||||
|
.BR setbuf (3)
|
||||||
|
.SH HISTORY
|
||||||
|
The
|
||||||
|
.BR funopen
|
||||||
|
functions first appeared in 4.4BSD.
|
||||||
|
.SH BUGS
|
||||||
|
The
|
||||||
|
.BR funopen
|
||||||
|
function
|
||||||
|
may not be portable to systems other than BSD.
|
||||||
214
usr.man/man5/utmp.5
Normal file
214
usr.man/man5/utmp.5
Normal file
@ -0,0 +1,214 @@
|
|||||||
|
.\" Copyright (c) 1980, 1991, 1993
|
||||||
|
.\" The Regents of the University of California. All rights reserved.
|
||||||
|
.\"
|
||||||
|
.\" Redistribution and use in source and binary forms, with or without
|
||||||
|
.\" modification, are permitted provided that the following conditions
|
||||||
|
.\" are met:
|
||||||
|
.\" 1. Redistributions of source code must retain the above copyright
|
||||||
|
.\" notice, this list of conditions and the following disclaimer.
|
||||||
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
.\" notice, this list of conditions and the following disclaimer in the
|
||||||
|
.\" documentation and/or other materials provided with the distribution.
|
||||||
|
.\" 3. All advertising materials mentioning features or use of this software
|
||||||
|
.\" must display the following acknowledgement:
|
||||||
|
.\" This product includes software developed by the University of
|
||||||
|
.\" California, Berkeley and its contributors.
|
||||||
|
.\" 4. Neither the name of the University nor the names of its contributors
|
||||||
|
.\" may be used to endorse or promote products derived from this software
|
||||||
|
.\" without specific prior written permission.
|
||||||
|
.\"
|
||||||
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||||
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
.\" SUCH DAMAGE.
|
||||||
|
.\"
|
||||||
|
.\" @(#)utmp.5 8.2 (Berkeley) 3/17/94
|
||||||
|
.\"
|
||||||
|
.TH UTMP 5 "17 September 1997" GNO "File Formats"
|
||||||
|
.SH NAME
|
||||||
|
.BR utmp ,
|
||||||
|
.BR wtmp ,
|
||||||
|
.BR lastlog
|
||||||
|
\- login records
|
||||||
|
.SH SYNOPSIS
|
||||||
|
#include <utmp.h>
|
||||||
|
.SH DESCRIPTION
|
||||||
|
The file
|
||||||
|
.BR <utmp.h>
|
||||||
|
declares the structures used to record information about current
|
||||||
|
users in the file
|
||||||
|
.BR utmp ,
|
||||||
|
logins and logouts in the file
|
||||||
|
.BR wtmp ,
|
||||||
|
and last logins in the file
|
||||||
|
.BR lastlog .
|
||||||
|
The time stamps of date changes, shutdowns and reboots are also logged in
|
||||||
|
the
|
||||||
|
.BR wtmp
|
||||||
|
file.
|
||||||
|
.LP
|
||||||
|
These files can grow rapidly on busy systems, daily or weekly rotation
|
||||||
|
is recommended.
|
||||||
|
If any of these files do not exist, it is not created.
|
||||||
|
These
|
||||||
|
files must be created manually and are normally maintained in either the script
|
||||||
|
.BR /etc/daily
|
||||||
|
or the script
|
||||||
|
.BR /etc/weekly .
|
||||||
|
(See
|
||||||
|
.BR cron (8).)
|
||||||
|
.nf
|
||||||
|
|
||||||
|
#define _PATH_UTMP "/var/run/utmp"
|
||||||
|
#define _PATH_WTMP "/var/log/wtmp"
|
||||||
|
#define _PATH_LASTLOG "/var/log/lastlog"
|
||||||
|
|
||||||
|
#define UT_NAMESIZE 8
|
||||||
|
#define UT_LINESIZE 8
|
||||||
|
#define UT_HOSTSIZE 16
|
||||||
|
|
||||||
|
struct lastlog {
|
||||||
|
time_t ll_time;
|
||||||
|
char ll_line[UT_LINESIZE];
|
||||||
|
char ll_host[UT_HOSTSIZE];
|
||||||
|
};
|
||||||
|
|
||||||
|
struct utmp {
|
||||||
|
char ut_line[UT_LINESIZE];
|
||||||
|
char ut_name[UT_NAMESIZE];
|
||||||
|
char ut_host[UT_HOSTSIZE];
|
||||||
|
long ut_time;
|
||||||
|
};
|
||||||
|
.fi
|
||||||
|
.LP
|
||||||
|
Each time a user logs in, the
|
||||||
|
.BR login
|
||||||
|
program looks up the user's
|
||||||
|
.I UID
|
||||||
|
in the file
|
||||||
|
.BR lastlog.
|
||||||
|
If it is found, the timestamp of the last time the user logged
|
||||||
|
in, the terminal line and the hostname
|
||||||
|
are written to the standard output. (Providing the login is not
|
||||||
|
.IR quiet ,
|
||||||
|
see
|
||||||
|
.BR login (1).)
|
||||||
|
The
|
||||||
|
.BR login
|
||||||
|
program then records the new login time in the file
|
||||||
|
.BR lastlog .
|
||||||
|
.LP
|
||||||
|
After the new
|
||||||
|
.I lastlog
|
||||||
|
record is written,
|
||||||
|
the file
|
||||||
|
.BR utmp
|
||||||
|
is opened and the
|
||||||
|
.I utmp
|
||||||
|
record for the user inserted.
|
||||||
|
This record remains there until
|
||||||
|
the user logs out at which time it is deleted.
|
||||||
|
The
|
||||||
|
.BR utmp
|
||||||
|
file is used by the programs
|
||||||
|
.BR rwho (1),
|
||||||
|
.BR users (1),
|
||||||
|
.BR w (1),
|
||||||
|
and
|
||||||
|
.BR who (1).
|
||||||
|
.LP
|
||||||
|
Next, the
|
||||||
|
.BR login
|
||||||
|
program opens the file
|
||||||
|
.BR wtmp ,
|
||||||
|
and appends the user's
|
||||||
|
.I utmp
|
||||||
|
record.
|
||||||
|
The same
|
||||||
|
.I utmp
|
||||||
|
record, with an updated time stamp is later appended
|
||||||
|
to the file when the user logs out. (See
|
||||||
|
.BR init (8).)
|
||||||
|
The
|
||||||
|
.BR wtmp
|
||||||
|
file is used by the programs
|
||||||
|
.BR last (1)
|
||||||
|
and
|
||||||
|
.BR ac (8).
|
||||||
|
.LP
|
||||||
|
In the event of a date change, a shutdown or reboot, the
|
||||||
|
following items are logged in the
|
||||||
|
.BR wtmp
|
||||||
|
file.
|
||||||
|
.LP
|
||||||
|
.RS
|
||||||
|
.IP "\fBreboot\fR, \fBshutdown\fR"
|
||||||
|
A system reboot or shutdown has been initiated.
|
||||||
|
The character
|
||||||
|
.BR \&~
|
||||||
|
is placed in the field
|
||||||
|
.IR ut_line ,
|
||||||
|
and
|
||||||
|
.B reboot
|
||||||
|
or
|
||||||
|
.B shutdown
|
||||||
|
in the field
|
||||||
|
.IR ut_name .
|
||||||
|
(See
|
||||||
|
.BR shutdown (8)
|
||||||
|
and
|
||||||
|
.BR reboot (8).)
|
||||||
|
.LP
|
||||||
|
.IP \fBdate\fR
|
||||||
|
The system time has been manually or automatically updated.
|
||||||
|
(See
|
||||||
|
.BR date (1).)
|
||||||
|
The command name
|
||||||
|
.BR date
|
||||||
|
is recorded in the field
|
||||||
|
.IR ut_name .
|
||||||
|
In the field
|
||||||
|
.IR ut_line ,
|
||||||
|
the character
|
||||||
|
.BR \\*(Ba
|
||||||
|
indicates the time prior to the change, and the character
|
||||||
|
.BR \&{
|
||||||
|
indicates the new time.
|
||||||
|
.RE
|
||||||
|
.SH FILES
|
||||||
|
.RS
|
||||||
|
.IP \fB/var/run/utmp\fR
|
||||||
|
The
|
||||||
|
.BR utmp file.
|
||||||
|
.IP \fB/var/log/wtmp\fR
|
||||||
|
The
|
||||||
|
.BR wtmp file.
|
||||||
|
.IP \fB/var/log/lastlog\fR
|
||||||
|
The
|
||||||
|
.BR lastlog file.
|
||||||
|
.RE
|
||||||
|
.SH BUGS
|
||||||
|
This man page is not quite right for the GNO implementation (the structures
|
||||||
|
are incorrect, as is the utmp path).
|
||||||
|
.SH SEE ALSO
|
||||||
|
.BR last (1),
|
||||||
|
.BR login (1),
|
||||||
|
.BR who (1),
|
||||||
|
.BR ac (8),
|
||||||
|
.BR init (8)
|
||||||
|
.SH HISTORY
|
||||||
|
A
|
||||||
|
.BR utmp
|
||||||
|
and
|
||||||
|
.BR wtmp
|
||||||
|
file format appeared in v6.
|
||||||
|
The
|
||||||
|
.BR lastlog
|
||||||
|
file format appeared in 3.0BSD.
|
||||||
Loading…
Reference in New Issue
Block a user