On Thu, Feb 2, 2012 at 8:27 AM, Jonathan Andrews <[email protected]> wrote: > >From Linux PC end, telnet to arm board > > [root@jonspc arm-many-voices]# rpm -qa |grep 'telnet' > telnet-0.17-45.fc12.i686 > [root@jonspc arm-many-voices]# uname -a > Linux jonspc 2.6.32.26-175.fc12.i686 #1 SMP Wed Dec 1 21:52:04 UTC 2010 > i686 athlon i386 GNU/Linux > > [root@jonspc sources]# telnet 10.10.10.111 2222 > Trying 10.10.10.111... > Connected to 10.10.10.111. > Escape character is '^]'. > > /bin/bash: line 1: $'\r': command not found > ls > /bin/bash: line 2: $'ls\r': command not found > > > > strace from arm board itself > > rcS-4.2# strace nc -l -p 2222 -e /bin/bash > execve("/sbin/nc", ["nc", "-l", "-p", "2222", "-e", "/bin/bash"], [/* 9 vars > */]) = 0 > uname({sys="Linux", node="(none)", ...}) = 0 > brk(0) = 0x2010000 > brk(0x2010cb2) = 0x2010cb2 > set_tls(0x2010450, 0x183018, 0, 0x1, 0x2010450) = 0 > brk(0x2031cb2) = 0x2031cb2 > brk(0x2032000) = 0x2032000 > getuid32() = 0 > socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 3 > setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 > bind(3, {sa_family=AF_INET, sin_port=htons(2222), > sin_addr=inet_addr("0.0.0.0")}, 16) = 0 > listen(3, 1) = 0 > fcntl64(3, F_SETFD, FD_CLOEXEC) = 0 > accept(3, 0, NULL) = 4 > dup2(4, 0) = 0 > close(4) = 0 > dup2(0, 1) = 1 > dup2(0, 2) = 2 > execve("/bin/bash", ["/bin/bash"], [/* 9 vars */]) = 0 > uname({sys="Linux", node="(none)", ...}) = 0 > brk(0) = 0x542000 > brk(0x542c9c) = 0x542c9c > set_tls(0x542450, 0x145408, 0, 0x1, 0x542450) = 0 > brk(0x563c9c) = 0x563c9c > brk(0x564000) = 0x564000 > open("/dev/tty", O_RDWR|O_NONBLOCK|O_LARGEFILE) = -1 ENXIO (No such device or > address) > ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, > 0xbefebc8c) = -1 EINVAL (Invalid argument) > getuid32() = 0 > getgid32() = 0 > geteuid32() = 0 > getegid32() = 0 > time(NULL) = 4390 > ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, > 0xbefebd88) = -1 EINVAL (Invalid argument) > open("/proc/meminfo", O_RDONLY) = 3 > fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) > = 0x40040000 > read(3, "MemTotal: 60544 kB\nMemF"..., 1024) = 924 > close(3) = 0 > munmap(0x40040000, 4096) = 0 > rt_sigaction(SIGCHLD, {SIG_DFL, [], SA_RESTART|0x4000000}, {SIG_DFL, [], 0}, > 8) = 0 > rt_sigaction(SIGCHLD, {SIG_DFL, [], SA_RESTART|0x4000000}, {SIG_DFL, [], > SA_RESTART|0x4000000}, 8) = 0 > rt_sigaction(SIGINT, {SIG_DFL, [], 0x4000000 /* SA_??? */}, {SIG_DFL, [], 0}, > 8) = 0 > rt_sigaction(SIGINT, {SIG_DFL, [], 0x4000000 /* SA_??? */}, {SIG_DFL, [], > 0x4000000 /* SA_??? */}, 8) = 0 > rt_sigaction(SIGQUIT, {SIG_DFL, [], 0x4000000 /* SA_??? */}, {SIG_DFL, [], > 0}, 8) = 0 > rt_sigaction(SIGQUIT, {SIG_DFL, [], 0x4000000 /* SA_??? */}, {SIG_DFL, [], > 0x4000000 /* SA_??? */}, 8) = 0 > rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 > rt_sigaction(SIGQUIT, {SIG_IGN, [], 0x4000000 /* SA_??? */}, {SIG_DFL, [], > 0x4000000 /* SA_??? */}, 8) = 0 > rt_sigaction(SIGINT, {0x3c504, [], 0x4000000 /* SA_??? */}, {SIG_DFL, [], > 0x4000000 /* SA_??? */}, 8) = 0 > uname({sys="Linux", node="(none)", ...}) = 0 > stat64("/dev", {st_mode=S_IFDIR|0755, st_size=69632, ...}) = 0 > stat64(".", {st_mode=S_IFDIR|0755, st_size=69632, ...}) = 0 > getpid() = 407 > getppid() = 406 > gettimeofday({4390, 350898}, NULL) = 0 > fcntl64(0, F_GETFL) = 0x2 (flags O_RDWR) > fstat64(0, {st_mode=S_IFSOCK|0777, st_size=0, ...}) = 0 > _llseek(0, 0, 0xbefebd54, SEEK_CUR) = -1 ESPIPE (Illegal seek) > wait4(-1, 0xbefebcd4, WNOHANG, NULL) = -1 ECHILD (No child processes) > read(0, "\r", 1) = 1 > read(0, "\n", 1) = 1 > stat64(".", {st_mode=S_IFDIR|0755, st_size=69632, ...}) = 0 > stat64("/sbin/\r", 0xbefebbd0) = -1 ENOENT (No such file or > directory)
Your telnet client sends CR+LF when you press <Enter>, not mere LF. Either use nc as client too, or use telnetd as the server. -- vda _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
