连接到拦截会给出“[errno 22] 无效参数” #1094

腹侧

我一直在尝试使用拦截的建议方法对 smoothieboard 的问题进行一些调试。不幸的是它没有连接。

尝试连接后，我立即得到：“[Errno 22] 无效参数”

看起来问题在于：

ioctl(5, TIOCMBIS, [TIOCM_DTR]) = -1 EINVAL (Invalid argument)

我不确定这是否是由于不支持所需的 ioctl 而导致的拦截中的错误，或者是 bCNC 中的错误，因为没有忽略建议的拦截未提供的缺失。

$ groups
vadim wheel dialout mock libvirt

$ sudo interceptty -l /dev/ttyACM_cnc  /dev/ttyACM_cnc_intercept | interceptty-nicedump 2>&1 | tee dump.log                                                                                                                                         

$ ls -l /dev/ttyACM_cnc_intercept  
lrwxrwxrwx. 1 root root 10 Dec 10 20:15 /dev/ttyACM_cnc_intercept -> /dev/pts/4

$ ls -l /dev/pts/4
crw-rw----. 1 root dialout 136, 4 Dec 10 20:15 /dev/pts/4

$ ls -l /dev/ttyACM_cnc
lrwxrwxrwx. 1 root root 7 Dec 10 19:56 /dev/ttyACM_cnc -> ttyACM1
 
$ ls -l /dev/ttyACM1   
crw-rw----. 1 root dialout 166, 1 Dec 10 20:06 /dev/ttyACM1

跟踪：


42207 10285 openat(AT_FDCWD, "/dev/ttyACM_cnc_intercept", O_RDWR|O_NOCTTY|O_NONBLOCK <unfinished ...>
42208 10300 <... socket resumed> )            = 4
42209 10300 setsockopt(4, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
42210 10300 bind(4, {sa_family=AF_INET, sin_port=htons(8080), sin_addr=inet_addr("0.0.0.0")}, 16 <unfinished ...>
42211 10285 <... openat resumed> )            = 5                                                                                                                                                                                                                                 
42212 10285 ioctl(5, TCGETS <unfinished ...>
42213 10300 <... bind resumed> )              = 0
42214 10285 <... ioctl resumed> , {B38400 -opost -isig -icanon -echo ...}) = 0
42215 10300 futex(0x5624e8aaee10, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, 0xffffffff <unfinished ...>
42216 10285 futex(0x5624e8aaee10, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
42217 10300 <... futex resumed> )             = -1 EAGAIN (Resource temporarily unavailable)
42218 10285 <... futex resumed> )             = 0
42219 10300 getsockname(4, {sa_family=AF_INET, sin_port=htons(8080), sin_addr=inet_addr("0.0.0.0")}, [16]) = 0
42220 10285 ioctl(5, TCGETS <unfinished ...>
42221 10300 futex(0x5624e8aaee10, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, 0xffffffff <unfinished ...>
42222 10285 <... ioctl resumed> , {B38400 -opost -isig -icanon -echo ...}) = 0
42223 10285 ioctl(5, SNDCTL_TMR_START or TCSETS, {B115200 -opost -isig -icanon -echo ...}) = 0
42224 10285 ioctl(5, TCGETS, {B115200 -opost -isig -icanon -echo ...}) = 0
42225 10285 futex(0x5624e8aaee10, FUTEX_WAKE_PRIVATE, 1) = 1
42226 10300 <... futex resumed> )             = 0
42227 10285 ioctl(5, TIOCMBIS, [TIOCM_DTR])   = -1 EINVAL (Invalid argument)

我有另一个错误中建议的 spy:/// 端口 URL 的解决方法，因此这不是关键问题。但是，github 页面底部建议的调试方法存在问题：

https://github.com/vlachoudis/bCNC