Ejemplo n.º 1
0
Archivo: sh.py Proyecto: jtauber/pyv6
def main(argv, argc):
    #static char buf[100];
    #int fd;
    
    # Assumes three file descriptors open.
    # while((fd = open("console", O_RDWR)) >= 0){
    while True:
        fd = open_("console", O_RDWR)
        if fd < 0:
            break
        
        if fd >= 3:
            close(fd)
            break
    
    # Read and run input commands.
    # while(getcmd(buf, sizeof(buf)) >= 0){
    while True:
        n, buf = getcmd(100)
        if n < 0:
            break
        
        if buf[0] == "c" and buf[1] == "d" and buf[2] == " ":
            # Clumsy but will have to do for now.
            # Chdir has no effect on the parent if run in the child.
            buf = buf[:strlen(buf) - 1]  # chop \n
            if chdir(buf[3:]) < 0:
                printf(2, "cannot cd %s\n", buf[3:])
            continue
        
        fork1(runcmd, parsecmd(buf))
        # wait()
    
    exit_()
Ejemplo n.º 2
0
Archivo: ls.py Proyecto: jtauber/pyv6
def fmtname(path):
    # static char buf[DIRSIZ+1];
    # find first character after last slash
    # for(p=path+strlen(path); p >= path && *p != '/'; p--)
    #   ;
    # p++;
    for i in range(strlen(path), 0, -1):
        if path[i - 1] == "/":
            break
    p = path[i:]
    
    # return blank-padded name
    
    if strlen(p) >= DIRSIZ:
        return p
    buf = p + " " * (DIRSIZ - strlen(p))
    return buf
Ejemplo n.º 3
0
Archivo: sh.py Proyecto: jtauber/pyv6
def parsecmd(st):
    s = 0
    es = s + strlen(st)
    
    cmd, s = parseline(st, s, es)
    
    dummy, s = peek(st, s, es, "\0")
    
    if s != es:
        printf(2, "leftovers: %s\n", st)
        panic("syntax")
    
    # nulterminate(cmd)
    
    return cmd
Ejemplo n.º 4
0
Archivo: ls.py Proyecto: jtauber/pyv6
def ls(path):
    
    fd = open_(path, 0)
    if fd < 0:
        printf(2, "ls: cannot open %s\n", path)
        return
    
    n, st = fstat(fd)
    if n < 0:
        printf(2, "ls: cannot stat %s\n", path)
        close(fd)
        return
    
    if st.type == T_FILE:
        printf(1, "%s %d %d %d\n", fmtname(path), st.type, st.ino, st.size)
    
    elif st.type == T_DIR:
        if strlen(path) + 1 + DIRSIZ + 1 > 512:
            printf(1, "ls: path too long\n")
        else:
            prefix = path + "/"
            
            #while (read(fd, &de, sizeof(de)) == sizeof(de))
            while True:
                n, de = read(fd, 20)  # @@@ 20 = sizeof(de)
                if n != 20:
                    break
                de_inum = int(de[:6])
                de_name = de[6:].strip()  # @@@
                
                if de_inum == 0:
                    continue
                path = prefix + de_name
                
                n, st = stat(path)
                if n < 0:
                    printf(1, "ls: cannot stat %s\n", path)
                    continue
                
                printf(1, "%s %d %d %d\n", fmtname(path), st.type, st.ino, st.size)
    close(fd)