ref: faa625a1d5ab47ac0438b2cea5b2bde1ea747b8b
dir: /sys/src/ape/cmd/uname.c/
#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); }