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Diffstat (limited to 'release/picobsd/tinyware/msg/msg.c')
-rw-r--r-- | release/picobsd/tinyware/msg/msg.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/release/picobsd/tinyware/msg/msg.c b/release/picobsd/tinyware/msg/msg.c new file mode 100644 index 0000000..4d0c3c1 --- /dev/null +++ b/release/picobsd/tinyware/msg/msg.c @@ -0,0 +1,75 @@ +/*- + * Copyright (c) 1998 Andrzej Bialecki <abial@freebsd.org> + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + * + * $FreeBSD$ + */ + +/* + * Small replacement for 'dmesg'. It doesn't need libkvm nor /dev/kmem. + */ + + +#include <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/sysctl.h> + +int +main(int argc, char *argv[]) +{ + int len,i; + char *buf,*p; + char *mib="kern.msgbuf"; + + /* We use sysctlbyname, because the oid is unknown (OID_AUTO) */ + + /* get the buffer size */ + i=sysctlbyname(mib,NULL,&len,NULL,0); + if(i) { + perror("buffer sizing"); + exit(-1); + } + buf=(char *)malloc(len*sizeof(char)); + i=sysctlbyname(mib,buf,&len,NULL,0); + if(i) { + perror("retrieving data"); + exit(-1); + } + p=buf; + i=0; + while(p<(buf+len)) { + switch(*p) { + case '\0': + /* skip initial NULLs */ + break; + default: + putchar(*p); + } + p++; + } + if(*--p!='\n') putchar('\n'); + free(buf); + exit(0); +} |