Subversion Repositories planix.SVN

#include <stdio.h>
#include <stdlib.h>
#include <sys/utsname.h>

#define ARGBEGIN        for((argv0=*argv),argv++,argc--;\
                            argv[0] && argv[0][0]=='-' && argv[0][1];\
                            argc--, argv++) {\
                                char *_args, *_argt, _argc;\
                                _args = &argv[0][1];\
                                if(_args[0]=='-' && _args[1]==0){\
                                        argc--; argv++; break;\
                                }\
                                while(*_args) switch(_argc=*_args++)
#define ARGEND          }
#define ARGF()          (_argt=_args, _args="",\
                                (*_argt? _argt: argv[1]? (argc--, *++argv): 0))
#define ARGC()          _argc

char *argv0;

static int started;

static void
prword(char *w)
{
        if (started)
                putchar(' ');
        else
                started = 1;
        fputs(w, stdout);
}

void
main(int argc, char **argv)
{
        struct utsname u;

        uname(&u);
        if(argc == 1){
                printf("%s\n", u.sysname);
                exit(0);
        }
        ARGBEGIN {
        case 'a':
                prword(u.sysname);
                prword(u.nodename);
                prword(u.release);
                prword(u.version);
                prword(u.machine);
                break;
        case 'm':
                prword(u.machine);
                break;
        case 'n':
                prword(u.nodename);
                break;
        case 'r':
                prword(u.release);
                break;
        case 's':
                prword(u.sysname);
                break;
        case 'v':
                prword(u.version);
                break;
        } ARGEND
        printf("\n");
        exit(0);
}