diff options
Diffstat (limited to 'usr.bin/uname/uname.c')
| -rw-r--r-- | usr.bin/uname/uname.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/usr.bin/uname/uname.c b/usr.bin/uname/uname.c new file mode 100644 index 0000000..810b218 --- /dev/null +++ b/usr.bin/uname/uname.c @@ -0,0 +1,251 @@ +/*- + * 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 +#define IFLAG 0x40 + +typedef void (*get_t)(void); +static get_t get_ident, get_platform, get_hostname, get_arch, + get_release, get_sysname, get_version; + +static void native_ident(void); +static void native_platform(void); +static void native_hostname(void); +static void native_arch(void); +static void native_release(void); +static void native_sysname(void); +static void native_version(void); +static void print_uname(u_int); +static void setup_get(void); +static void usage(void); + +static char *ident, *platform, *hostname, *arch, *release, *sysname, *version; +static int space; + +int +main(int argc, char *argv[]) +{ + u_int flags; + int ch; + + setup_get(); + flags = 0; + + while ((ch = getopt(argc, argv, "aimnoprsv")) != -1) + switch(ch) { + case 'a': + flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); + break; + case 'i': + flags |= IFLAG; + break; + case 'm': + flags |= MFLAG; + break; + case 'n': + flags |= NFLAG; + break; + case 'p': + flags |= PFLAG; + break; + case 'r': + flags |= RFLAG; + break; + case 's': + case 'o': + 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) + +static 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); + CHECK_ENV("i", ident); +} + +#define PRINT_FLAG(flags,flag,var) \ + if ((flags & flag) == flag) { \ + if (space) \ + printf(" "); \ + else \ + space++; \ + if (get_##var != NULL) \ + (*get_##var)(); \ + printf("%s", var); \ + } + +static 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); + PRINT_FLAG(flags, IFLAG, ident); + printf("\n"); +} + +#define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ +static 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_SYSCTLNAME_GET(var,name) \ +static void \ +native_##var(void) \ +{ \ + size_t len; \ + static char buf[1024]; \ + char **varp = &(var); \ + \ + len = sizeof buf; \ + if (sysctlbyname(name, &buf, &len, NULL,\ + 0) == -1) \ + err(1, "sysctlbyname"); + +#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; + +NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { +} NATIVE_SET; + +static void +usage(void) +{ + fprintf(stderr, "usage: uname [-aimnoprsv]\n"); + exit(1); +} |
