sys/cmd/ls/ls.c


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#include <u.h>
#include <libn.h>

static struct Flags {
    uchar a : 1; /* show all files */
    uchar r : 1; /* reverse sort */
    uchar v : 1; /* print detailed information */
    uchar h : 1; /* human readable */
    uchar s : 1; /* sort by size */
} flag;

static
void
usage(void)
{
    fputs("usage: ls [-ahsrv] [file ...]\n", stderr);
    exit(1);
}

int
main(int argc, char *argv[])
{
    int i;
    ARGBEGIN{
	case 'a':   flag.a++; break;
    default:
        usage();
    }ARGEND;

    switch(argc) {
    case 0:
        *--argv = ".", ++argc;
    /* fallthrough */
    case 1:
    }
}