135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/*
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* Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* uname.c
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* Write system information.
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*/
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#include <sys/utsname.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static const int PRINT_KERNELNAME = 1 << 0;
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static const int PRINT_NODENAME = 1 << 1;
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static const int PRINT_KERNELREL = 1 << 2;
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static const int PRINT_KERNELVER = 1 << 3;
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static const int PRINT_TAGLINE = 1 << 4;
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static const int PRINT_MACHINE = 1 << 5;
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static const int PRINT_PROCESSOR = 1 << 6;
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const char* print(const char* prefix, const char* msg)
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{
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printf("%s%s", prefix, msg);
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return " ";
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}
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static void compact_arguments(int* argc, char*** argv)
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{
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for ( int i = 0; i < *argc; i++ )
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{
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while ( i < *argc && !(*argv)[i] )
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{
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for ( int n = i; n < *argc; n++ )
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(*argv)[n] = (*argv)[n+1];
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(*argc)--;
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}
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}
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}
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int main(int argc, char* argv[])
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{
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int flags = 0;
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for ( int i = 1; i < argc; i++ )
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{
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const char* arg = argv[i];
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if ( arg[0] != '-' || !arg[1] )
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continue;
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argv[i] = NULL;
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if ( !strcmp(arg, "--") )
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break;
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if ( arg[1] != '-' )
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{
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char c;
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while ( (c = *++arg) ) switch ( c )
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{
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case 'a': flags |= INT_MAX; break;
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case 'm': flags |= PRINT_MACHINE; break;
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case 'n': flags |= PRINT_NODENAME; break;
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case 'p': flags |= PRINT_PROCESSOR; break;
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case 'r': flags |= PRINT_KERNELREL; break;
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case 's': flags |= PRINT_KERNELNAME; break;
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case 't': flags |= PRINT_TAGLINE; break;
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case 'v': flags |= PRINT_KERNELVER; break;
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default:
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errx(1, "unknown option -- '%c'", c);
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}
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}
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else if ( !strcmp(arg, "--kernel-name") )
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flags |= PRINT_KERNELNAME;
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else if ( !strcmp(arg, "--kernel-release") )
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flags |= PRINT_KERNELREL;
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else if ( !strcmp(arg, "--kernel-version") )
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flags |= PRINT_KERNELVER;
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else if ( !strcmp(arg, "--machine") )
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flags |= PRINT_MACHINE;
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else if ( !strcmp(arg, "--nodename") )
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flags |= PRINT_NODENAME;
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else if ( !strcmp(arg, "--processor") )
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flags |= PRINT_PROCESSOR;
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else if ( !strcmp(arg, "--tagline") )
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flags |= PRINT_TAGLINE;
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else
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errx(1, "unknown option: %s", arg);
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}
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compact_arguments(&argc, &argv);
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if ( 1 < argc )
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errx(1, "extra operand");
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static struct utsname utsname;
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if ( uname(&utsname) < 0 )
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err(1,"uname");
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if ( !flags )
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flags = PRINT_KERNELNAME;
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const char* prefix = "";
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if ( flags & PRINT_KERNELNAME )
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prefix = print(prefix, utsname.sysname);
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if ( flags & PRINT_NODENAME )
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prefix = print(prefix, utsname.nodename);
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if ( flags & PRINT_KERNELREL )
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prefix = print(prefix, utsname.release);
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if ( flags & PRINT_TAGLINE )
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prefix = print(prefix, utsname.tagline);
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if ( flags & PRINT_KERNELVER )
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prefix = print(prefix, utsname.version);
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if ( flags & PRINT_MACHINE )
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prefix = print(prefix, utsname.machine);
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if ( flags & PRINT_PROCESSOR )
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prefix = print(prefix, utsname.processor);
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printf("\n");
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return 0;
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}
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