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freebsd/usr.bin/uname/uname.c
Juli Mallett 5a4ba400c1 Use some macro evil to create the functions for using sysctl(3) to get each
variable natively.  It should allow you to use any sysctl mib set, but due
to limitations of what I can do with macros, right now it's limited to two,
which is all this program used anyway.

Sponsored by:	Bright Path Solutions
2002-09-23 06:47:39 +00:00

227 lines
5.2 KiB
C

/*-
* Copyright (c) 2002 Juli Mallett.
* Copyright (c) 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#ifndef lint
static const char sccsid[] = "@(#)uname.c 8.2 (Berkeley) 5/4/95";
#endif
#include <sys/param.h>
#include <sys/sysctl.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define MFLAG 0x01
#define NFLAG 0x02
#define PFLAG 0x04
#define RFLAG 0x08
#define SFLAG 0x10
#define VFLAG 0x20
typedef void (*get_t)(void);
get_t get_platform, get_hostname, get_arch, get_release, get_sysname, get_version;
void native_platform(void);
void native_hostname(void);
void native_arch(void);
void native_release(void);
void native_sysname(void);
void native_version(void);
void print_uname(u_int);
void setup_get(void);
void usage(void);
char *platform, *hostname, *arch, *release, *sysname, *version;
int space;
int
main(int argc, char *argv[])
{
u_int flags;
int ch;
setup_get();
flags = 0;
while ((ch = getopt(argc, argv, "amnprsv")) != -1)
switch(ch) {
case 'a':
flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
break;
case 'm':
flags |= MFLAG;
break;
case 'n':
flags |= NFLAG;
break;
case 'p':
flags |= PFLAG;
break;
case 'r':
flags |= RFLAG;
break;
case 's':
flags |= SFLAG;
break;
case 'v':
flags |= VFLAG;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc)
usage();
if (!flags)
flags |= SFLAG;
print_uname(flags);
exit(0);
}
#define CHECK_ENV(opt,var) \
do { \
if ((var = getenv("UNAME_" opt)) == NULL) { \
get_##var = native_##var; \
} else { \
get_##var = (get_t)NULL; \
} \
} while (0)
void
setup_get(void)
{
CHECK_ENV("s", sysname);
CHECK_ENV("n", hostname);
CHECK_ENV("r", release);
CHECK_ENV("v", version);
CHECK_ENV("m", platform);
CHECK_ENV("p", arch);
}
#define PRINT_FLAG(flags,flag,var) \
if ((flags & flag) == flag) { \
if (space) \
printf(" "); \
else \
space++; \
if (get_##var != NULL) \
(*get_##var)(); \
printf("%s", var); \
}
void
print_uname(u_int flags)
{
PRINT_FLAG(flags, SFLAG, sysname);
PRINT_FLAG(flags, NFLAG, hostname);
PRINT_FLAG(flags, RFLAG, release);
PRINT_FLAG(flags, VFLAG, version);
PRINT_FLAG(flags, MFLAG, platform);
PRINT_FLAG(flags, PFLAG, arch);
printf("\n");
}
#define NATIVE_SYSCTL2_GET(var,mib0,mib1) \
void \
native_##var(void) \
{ \
int mib[] = { (mib0), (mib1) }; \
size_t len; \
static char buf[1024]; \
char **varp = &(var); \
\
len = sizeof buf; \
if (sysctl(mib, sizeof mib / sizeof mib[0], \
&buf, &len, NULL, 0) == -1) \
err(1, "sysctl");
#define NATIVE_SET \
*varp = buf; \
return; \
} struct __hack
#define NATIVE_BUFFER (buf)
#define NATIVE_LENGTH (len)
NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) {
} NATIVE_SET;
NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) {
} NATIVE_SET;
NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) {
} NATIVE_SET;
NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) {
size_t n;
char *p;
p = NATIVE_BUFFER;
n = NATIVE_LENGTH;
for (; n--; ++p)
if (*p == '\n' || *p == '\t')
*p = ' ';
} NATIVE_SET;
NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) {
} NATIVE_SET;
NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
} NATIVE_SET;
void
usage(void)
{
fprintf(stderr, "usage: uname [-amnprsv]\n");
exit(1);
}