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syslogc - client to read memory buffered logs from syslogd;

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manpage nits jmc@, fixes jose@; ok deraadt@
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djm 2004-01-04 08:30:21 +00:00
parent c1d2012af4
commit ffb9ed4e90
3 changed files with 211 additions and 0 deletions
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7
usr.sbin/syslogc/Makefile Normal file
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# $OpenBSD: Makefile,v 1.1 2004/01/04 08:30:21 djm Exp $
PROG= syslogc
SRCS= syslogc.c
MAN= syslogc.8
.include <bsd.prog.mk>

75
usr.sbin/syslogc/syslogc.8 Normal file
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.\" $OpenBSD: syslogc.8,v 1.1 2004/01/04 08:30:21 djm Exp $
.\"
.\" Copyright (c) 2004 Damien Miller
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.Dd November 2, 2003
.Dt SYSLOGC 8
.Os
.Sh NAME
.Nm syslogc
.Nd collect messages from syslog memory buffer
.Sh SYNOPSIS
.Nm syslogc
.Op Fl Ccq
.Op Fl s Ar reporting_socket
.Ar logname
.Nm syslogc
.Op Fl Cc
.Ar logname
.Nm syslogc
.Fl q
.Sh DESCRIPTION
.Nm
collects messages from the
.Xr syslogd 8
memory buffer specified by the
.Ar logname
argument.
.Pp
For
.Nm
to work,
.Xr syslogd 8
must be configured with one or more memory buffer logs (see
.Xr syslog.conf 5
for details) and have a reporting socket location specified on the
commandline (using the
.Fl s
option to
.Xr syslogd 8 ) .
.Pp
By default,
.Nm
will query the specified log and return it to standard output.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl C
Request that the log buffer be cleared without reading it.
.It Fl c
Request that the log buffer be cleared once it has been read.
.It Fl q
Request a list of available logs.
.It Fl s Ar reporting_socket
Specify alternate reporting socket location (the default is
.Pa /var/run/syslogd.sock ) .
.El
.Sh SEE ALSO
.Xr syslog 3 ,
.Xr syslog.conf 5
.Sh HISTORY
The
.Nm
command first appeared in
.Ox 3.5 .

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usr.sbin/syslogc/syslogc.c Normal file
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/* $OpenBSD: syslogc.c,v 1.1 2004/01/04 08:30:21 djm Exp $ */
/*
* Copyright (c) 2004 Damien Miller
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define DEFAULT_CTLSOCK "/var/run/syslogd.sock"
#define MAX_MEMBUF_NAME 64 /* Max length of membuf log name */
struct ctl_cmd {
#define CMD_READ 1 /* Read out log */
#define CMD_READ_CLEAR 2 /* Read and clear log */
#define CMD_CLEAR 3 /* Clear log */
#define CMD_LIST 4 /* List available logs */
int cmd;
char logname[MAX_MEMBUF_NAME];
};
static void
usage(void)
{
extern char *__progname;
fprintf(stderr, "Usage: %s [-Ccq] [-s ctlsock] logname\n", __progname);
exit(1);
}
int
main(int argc, char **argv)
{
const char *ctlsock_path;
char buf[8192];
struct sockaddr_un ctl;
socklen_t ctllen;
int ctlsock, ch;
FILE *ctlf;
extern char *optarg;
extern int optind;
struct ctl_cmd cc;
memset(&cc, '\0', sizeof(cc));
ctlsock_path = DEFAULT_CTLSOCK;
while ((ch = getopt(argc, argv, "Cchqs:")) != -1) {
switch (ch) {
case 'h':
usage();
break;
case 'q':
cc.cmd = CMD_LIST;
break;
case 'c':
cc.cmd = CMD_READ_CLEAR;
break;
case 'C':
cc.cmd = CMD_CLEAR;
break;
case 's':
ctlsock_path = optarg;
break;
default:
fprintf(stderr, "Invalid commandline option.\n");
usage();
break;
}
}
if (cc.cmd == 0)
cc.cmd = CMD_READ;
if ((cc.cmd != CMD_LIST && optind != argc - 1) ||
(cc.cmd == CMD_LIST && optind != argc))
usage();
if (cc.cmd != CMD_LIST) {
if (strlcpy(cc.logname, argv[optind], sizeof(cc.logname)) >
sizeof(cc.logname))
errx(1, "Specified log name is too long");
}
strlcpy(ctl.sun_path, ctlsock_path, sizeof(ctl.sun_path));
ctl.sun_path[sizeof(ctl.sun_path) - 1] = '\0';
ctl.sun_family = AF_UNIX;
if ((ctlsock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
err(1, "ctl socket() error");
if (connect(ctlsock, (struct sockaddr*)&ctl, sizeof(ctl)) == -1)
err(1, "ctl connect(\"%s\") error", ctl.sun_path);
if ((ctlf = fdopen(ctlsock, "r+")) == NULL)
err(1, "fdopen");
/* Send command */
if (fwrite(&cc, sizeof(cc), 1, ctlf) <= 0)
err(1, "fwrite");
fflush(ctlf);
setlinebuf(ctlf);
/* Write out reply */
while((fgets(buf, sizeof(buf), ctlf)) != NULL)
fputs(buf, stdout);
fclose(ctlf);
close(ctlsock);
exit(0);
}