ref: a351bcdccdf5a4273bc8dc3360a48fbb8b8aa9ea
dir: /src/aecho.c/
#include <u.h> #include <libc.h> void main(int argc, char* argv[]) { int nflag = 0; int vflag = 0; int i; ARGBEGIN{ case 'v': vflag = 1; break; case 'n': nflag = 1; break; default: fprint(2, "usage: %s [-nv] args\n", argv0); exits("usage"); }ARGEND; for (i = 0; i < argc; i++) if (vflag) print("[%s] ", argv[i]); else print("%s ", argv[i]); if (!nflag) print("\n"); exits(nil); }