diff options
Diffstat (limited to 'system_cmds/dmesg.tproj')
-rw-r--r-- | system_cmds/dmesg.tproj/dmesg.8 | 55 | ||||
-rw-r--r-- | system_cmds/dmesg.tproj/dmesg.c | 101 |
2 files changed, 156 insertions, 0 deletions
diff --git a/system_cmds/dmesg.tproj/dmesg.8 b/system_cmds/dmesg.tproj/dmesg.8 new file mode 100644 index 0000000..ca3758b --- /dev/null +++ b/system_cmds/dmesg.tproj/dmesg.8 @@ -0,0 +1,55 @@ +.\" 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. +.\" +.\" @(#)dmesg.8 8.1 (Berkeley) 6/5/93 +.\" +.Dd June 5, 1993 +.Dt DMESG 8 +.Os BSD 4 +.Sh NAME +.Nm dmesg +.Nd "display the system message buffer" +.Sh SYNOPSIS +.Nm dmesg +.Op Fl M Ar core +.Op Fl N Ar system +.Sh DESCRIPTION +.Nm Dmesg +displays the contents of the system message buffer. +This command needs to be run as root. +.Pp +.Sh SEE ALSO +.Xr syslogd 8 +.Sh HISTORY +The +.Nm +command appeared in +.Bx 4.0 . diff --git a/system_cmds/dmesg.tproj/dmesg.c b/system_cmds/dmesg.tproj/dmesg.c new file mode 100644 index 0000000..ed62442 --- /dev/null +++ b/system_cmds/dmesg.tproj/dmesg.c @@ -0,0 +1,101 @@ +/* + * Copyright (c) 1999-2016 Apple Inc. All rights reserved. + * + * @APPLE_LICENSE_HEADER_START@ + * + * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights + * Reserved. This file contains Original Code and/or Modifications of + * Original Code as defined in and that are subject to the Apple Public + * Source License Version 1.0 (the 'License'). You may not use this file + * except in compliance with the License. Please obtain a copy of the + * License at http://www.apple.com/publicsource and read it before using + * this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, + * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the + * License for the specific language governing rights and limitations + * under the License." + * + * @APPLE_LICENSE_HEADER_END@ + */ +/*- + * Copyright (c) 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. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <vis.h> +#include <sys/sysctl.h> +#include <libproc.h> + +static void +usage(void) +{ + (void)fprintf(stderr, "usage: sudo dmesg\n"); + exit(1); +} + +int +main(int argc, char **argv) +{ + char *msgbuf, *visbuf; + int msgbufsize; + size_t sysctlsize = sizeof(msgbufsize); + long data_size; + + if (argc > 1) + usage(); + + if (sysctlbyname("kern.msgbuf", &msgbufsize, &sysctlsize, NULL, 0)) { + perror("Unable to size kernel buffer"); + } + + msgbuf = malloc(msgbufsize); + if (msgbuf == NULL) { + perror("Unable to allocate a message buffer"); + } + + if ((data_size = proc_kmsgbuf(msgbuf, msgbufsize)) == 0){ + perror("Unable to obtain kernel buffer"); + usage(); + } + + visbuf = malloc(data_size*4); + strvis(visbuf, msgbuf, 0); + printf("%s", visbuf); + free(visbuf); + free(msgbuf); + exit(0); +} |