272 lines
5.7 KiB
C
272 lines
5.7 KiB
C
/*-
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* Copyright (c) 2002 Juli Mallett.
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)uname.c 8.2 (Berkeley) 5/4/95";
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#endif
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define MFLAG 0x01
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#define NFLAG 0x02
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#define PFLAG 0x04
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#define RFLAG 0x08
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#define SFLAG 0x10
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#define VFLAG 0x20
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typedef void (*get_t)(void);
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get_t get_platform, get_hostname, get_arch, get_release, get_sysname, get_version;
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void native_platform(void);
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void native_hostname(void);
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void native_arch(void);
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void native_release(void);
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void native_sysname(void);
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void native_version(void);
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void print_uname(u_int);
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void setup_get(void);
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void usage(void);
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char *platform, *hostname, *arch, *release, *sysname, *version;
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int space;
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int
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main(int argc, char *argv[])
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{
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u_int flags;
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int ch;
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setup_get();
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while ((ch = getopt(argc, argv, "amnprsv")) != -1)
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switch(ch) {
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case 'a':
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flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
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break;
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case 'm':
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flags |= MFLAG;
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break;
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case 'n':
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flags |= NFLAG;
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break;
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case 'p':
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flags |= PFLAG;
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break;
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case 'r':
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flags |= RFLAG;
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break;
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case 's':
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flags |= SFLAG;
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break;
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case 'v':
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flags |= VFLAG;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc)
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usage();
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if (!flags)
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flags |= SFLAG;
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print_uname(flags);
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exit(0);
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}
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#define CHECK_ENV(opt,var) \
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do { \
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if ((var = getenv("UNAME_" opt)) == NULL) { \
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get_##var = native_##var; \
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} else { \
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get_##var = (get_t)NULL; \
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} \
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} while (0)
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void
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setup_get(void)
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{
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CHECK_ENV("s", sysname);
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CHECK_ENV("n", hostname);
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CHECK_ENV("r", release);
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CHECK_ENV("v", version);
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CHECK_ENV("m", platform);
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CHECK_ENV("p", arch);
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}
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#define PRINT_FLAG(flags,flag,var) \
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if ((flags & flag) == flag) { \
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if (space) \
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printf(" "); \
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else \
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space++; \
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if (get_##var != NULL) \
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(*get_##var)(); \
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printf("%s", var); \
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}
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void
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print_uname(u_int flags)
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{
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PRINT_FLAG(flags, SFLAG, sysname);
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PRINT_FLAG(flags, NFLAG, hostname);
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PRINT_FLAG(flags, RFLAG, release);
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PRINT_FLAG(flags, VFLAG, version);
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PRINT_FLAG(flags, MFLAG, platform);
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PRINT_FLAG(flags, PFLAG, arch);
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printf("\n");
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}
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void
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native_sysname(void)
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{
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int mib[2];
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size_t len;
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static char buf[1024];
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mib[0] = CTL_KERN;
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mib[1] = KERN_OSTYPE;
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len = sizeof(buf);
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if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
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err(1, "sysctl");
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sysname = buf;
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}
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void
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native_hostname(void)
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{
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int mib[2];
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size_t len;
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static char buf[1024];
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mib[0] = CTL_KERN;
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mib[1] = KERN_HOSTNAME;
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len = sizeof(buf);
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if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
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err(1, "sysctl");
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hostname = buf;
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}
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void
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native_release(void)
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{
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int mib[2];
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size_t len;
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static char buf[1024];
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mib[0] = CTL_KERN;
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mib[1] = KERN_OSRELEASE;
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len = sizeof(buf);
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if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
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err(1, "sysctl");
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release = buf;
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}
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void
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native_version(void)
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{
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int mib[2];
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size_t len, tlen;
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char *p;
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static char buf[1024];
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mib[0] = CTL_KERN;
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mib[1] = KERN_VERSION;
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len = sizeof(buf);
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if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
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err(1, "sysctl");
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for (p = buf, tlen = len; tlen--; ++p)
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if (*p == '\n' || *p == '\t')
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*p = ' ';
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version = buf;
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}
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void
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native_platform(void)
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{
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int mib[2];
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size_t len;
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static char buf[1024];
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mib[0] = CTL_HW;
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mib[1] = HW_MACHINE;
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len = sizeof(buf);
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if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
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err(1, "sysctl");
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platform = buf;
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}
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void
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native_arch(void)
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{
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int mib[2];
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size_t len;
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static char buf[1024];
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mib[0] = CTL_HW;
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mib[1] = HW_MACHINE_ARCH;
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len = sizeof(buf);
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if (sysctl(mib, 2, &buf, &len, NULL, 0) == -1)
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err(1, "sysctl");
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arch = buf;
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}
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void
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usage(void)
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{
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fprintf(stderr, "usage: uname [-amnprsv]\n");
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exit(1);
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}
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