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_()
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
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
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)