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| 09:42.32 | Senor | why my getty runs for infinitely loop ? |
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| 10:10.25 | _av500__ | when should it stop? |
| 10:15.08 | Senor | I typed my account ,then it prompt "loing:" again . |
| 10:15.19 | Senor | login:root |
| 10:15.26 | Senor | login :root |
| 10:15.30 | _av500__ | something is wrong then |
| 10:15.36 | Senor | no password prompt |
| 10:18.26 | Senor | Is there one portable init file which do the init relevent stuff? |
| 10:20.32 | Senor | why no error msgs print out ? |
| 10:49.41 | mnemoc | empty /etc/shadow ? |
| 10:50.09 | mnemoc | `pwconv` might help |
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| 11:42.12 | Senor | mnemoc:Maybe it is as you saying |
| 11:43.11 | mnemoc | getty doesn't give the prompts, login does |
| 11:43.53 | mnemoc | so something is making `login` fail to ask for a password. /etc/shadow is an easy blame |
| 11:47.18 | mnemoc | it could also be omiting to ask for the password if the field is empty, and then failing to spawn the shell |
| 11:47.31 | mnemoc | but you should see an error in that case |
| 11:49.59 | Senor | mnemoc:what is pwconv ? |
| 11:51.05 | mnemoc | a tool to sync /etc/passwd and /etc/shadow |
| 11:52.00 | mnemoc | in the case your `login` uses shadow |
| 11:52.07 | Senor | I also have no /etc/passwd ,just one pure kernel image compiled from source |
| 11:52.42 | mnemoc | *cough* |
| 11:53.31 | Senor | how is the /etc/passwd file generated ? |
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| 13:06.23 | Senor | mnemoc:qre you still online? |
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| 14:05.45 | legov | Anyone have any resoures for setting the appropriate clock speed for ARM processors (I'm using DM3730)? |
| 14:06.17 | legov | I know it can run at 300, 600, 800 and 1 GHz, but cpufreq shows hardware limits of 300 - 600. I can't set it above this range. |
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| 14:19.08 | mnemoc | Senor_: grep ^root /etc/passwd in your host should give you enough to get started |
| 14:19.39 | mnemoc | Senor_: and `man 5 passwd` |
| 14:40.48 | Senor | mnemoc:If I have not logined into system , i have no wayes to create account |
| 14:41.05 | mnemoc | init=/bin/sh |
| 14:41.58 | Senor | oh , do you mean I chould login into system by /bin/sh ,and then create account for myself? |
| 14:43.12 | mnemoc | sure |
| 14:43.31 | mnemoc | init-less, so you might need to mount /dev, /sys and /proc yourself |
| 14:43.44 | mnemoc | if you enable devtmpfs that's pretty trivial |
| 14:44.29 | Senor | I have /dev/ mounted |
| 14:46.16 | Senor | mnemoc : another question , after I login into system through shell , I compile one .c file by gcc ,it report :can not open xxxx.so |
| 14:46.28 | Senor | permission denied |
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| 14:47.12 | mnemoc | check the file exists, check you have read access to it, check it's in the right place |
| 14:51.12 | Senor | At that time ,i have not ever create any account , who and how does the permission check ? I am wondring . |
| 14:52.52 | mnemoc | uid 0 exists |
| 14:53.13 | Senor | custom account ? |
| 14:53.18 | Senor | customer account ? |
| 14:53.32 | mnemoc | but you need basic root support in /etc/passwd, /etc/groups and /etc/shadow |
| 14:55.07 | Senor | what instances is uid 0 used in ? |
| 14:57.10 | mnemoc | do you know the usual name of uid 0? |
| 14:57.26 | Senor | is it root? |
| 14:57.31 | mnemoc | yes |
| 14:57.51 | mnemoc | and it's power is not set in userspace |
| 14:58.20 | mnemoc | but not having a name for it will puzzle your libc |
| 14:58.30 | mnemoc | and tools |
| 15:06.51 | Senor | If I init through /bin/sh bypass login routine, is my power of root at that time ? |
| 15:10.01 | mnemoc | you are running as root, yes |
| 15:12.27 | Senor | then Since libc can not recognize that name , it report permission denied ? |
| 15:12.41 | mnemoc | it shouldn't |
| 15:12.55 | mnemoc | permission denied is the translation of an error given by the kernel |
| 15:13.02 | mnemoc | not decided by the userspace |
| 15:13.07 | Senor | oh |
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| 15:13.36 | mnemoc | check the permissions, dir by dir, from / to your .so |
| 15:13.37 | Senor | so I should give uid 0 one name |
| 15:13.57 | mnemoc | yes, like `grep ^root /etc/passwd` |
| 15:14.11 | mnemoc | leave the password field empty if you want to make things easier |
| 15:17.11 | Senor | Chould I manually copy one /etc/passwd file to this system ? |
| 15:18.38 | mnemoc | you could, yes |
| 15:19.26 | Senor | So nothing is impossilbe for linux . |
| 15:20.38 | mnemoc | the power of simplicity |
| 15:21.21 | Senor | I agree with you ! |
| 15:27.02 | Senor | Should computer technology be simplicity or complexity ? |
| 15:28.39 | mnemoc | Senor: read "the art of unix programming" |
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| 15:29.21 | mnemoc | freely readable online |
| 15:32.16 | Senor | I can feel linux's simplicity ,and also feel complexity of windows |
| 15:32.46 | mnemoc | Senor: "the practice of programming" is also great reading, but that one is not freely available |
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| 15:45.31 | Senor | How can I mount /sys and /proc myself ? |
| 15:46.22 | mnemoc | Senor: http://www.linuxfromscratch.org/ |
| 15:47.50 | Senor | which module Should I read ? |
| 15:48.23 | mnemoc | all of it. |
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| 15:50.28 | mnemoc | if you want to make your own linux-based distro you need to learn how the things work |
| 15:53.05 | mnemoc | as you don't know how to mount /proc or /sys, it's clear you need to study first |
| 15:56.09 | Senor | ok ,thanks! |
| 16:00.55 | _av500_ | also have a look at biuldroot |
| 16:15.06 | Senor | _av500_: at LFS? |
| 16:15.44 | _av500_ | http://buildroot.uclibc.org/ |
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| 16:41.52 | Senor | Thanks! |
| 16:49.26 | Senor | what is the reason for "can't access tty,job controll turned off" |
| 16:58.13 | landley | Senor: /dev/console isn't a tty. |
| 16:58.46 | landley | The API that queries screen width/height and cursor position, or requests signals be directed to this program when someone hits ctrl-c or ctrl-z, isn't there for that device. |
| 16:59.28 | landley | (A tty is a layer of extra functionality on top of a pipe, via ioctl() calls. Not all filehandles have the tty stuff.) |
| 17:00.20 | landley | If it tries the tty ioctl() and gets an -ETALKTOTHEHAND it can't do the raw/cooked stuff or make ctrl-C work. |
| 17:03.23 | Senor | landley:So what I got missed for that? |
| 17:03.46 | landley | Senor: you asked about "can't access tty, job control turned off". |
| 17:04.12 | Senor | yes , I can open console , but how to open tty? |
| 17:04.16 | landley | Job control is the Ctrl-Z to suspend current task followed by fg/bg command to continue the suspended task in foreground or background. |
| 17:04.33 | landley | If you need a tty you need to redirect input from /dev/console to a /dev that provides a tty. |
| 17:04.44 | landley | So if /dev/console is actually /dev/ttyS0 you need to rebase to that. |
| 17:04.53 | landley | I wrote a program to do that once, called oneit.c. |
| 17:05.13 | Senor | link ? |
| 17:06.37 | landley | http://landley.net/hg/aboriginal/file/92d5df091df4/sources/toys/oneit.c |
| 17:06.42 | landley | There's a "raw" link on the left. |
| 17:06.52 | landley | That's the standalone version, toybox also has it integrated. |
| 17:09.16 | Senor | landley : It is resulted from no tty for current process |
| 17:13.48 | landley | Senor: You can redirect stdin/stdout/stderr to something providing a tty. |
| 17:14.05 | landley | (Note that a pty wraps a pipe in a tty and has a program at the other end, such as xterm, handle the terminal control stuff.) |
| 17:15.27 | Senor | landley : Actually , the tty_open function failed in kernel ,due to no tty found for current process |
| 17:16.09 | Senor | should I asssigned one tty to current process manually ? |
| 17:22.33 | landley | What device is stdin/stdout connected to? |
| 17:22.47 | landley | ls -l /proc/self/fd/0 |
| 17:27.45 | Senor | Chould I assign console to tty? |
| 17:28.11 | Senor | by code |
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| 17:29.55 | landley | Probably something like "setsid my command line </dev/ttyS0 >&0 2>&1" would work. |
| 17:30.08 | landley | But what are you _trying_ to do? |
| 17:30.28 | landley | I'd guess you're running a shell, based on the message you reported. |
| 17:31.00 | landley | That shell _does_ have I/O from your terminal, it just doesn't have the terminal signals going through. Just the raw stdin/stdout/stderr data. |
| 17:31.01 | landley | Correct? |
| 17:31.32 | landley | So redirecting to some random device won't work, you need the RIGHT device. The one that's currently providing stdin/stdout/stderr already. |
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| 18:28.52 | envogue | what are the cost of zigbee modules? i thought they were suppsoed to be cheap but i only found for 12-40 dollars. in would like to 5-6 zigbee nodes which can be programmed. price? where can i fidn them cheap? |
| 18:30.56 | SpeedEvil | free scale |
| 18:31.05 | SpeedEvil | but they only do chips |
| 18:51.56 | _av500_ | envogue: zigbee is cheap in large volumes |
| 18:52.16 | _av500_ | and 12$ sounds OK to me |
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| 18:59.23 | envogue | cheap is maybe for companies not for private persons? |
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| 19:11.55 | envogue | is microchips stuff a good starting point? |
| 19:18.15 | SpeedEvil | ZigBee is annoying in that it's floss unfriendly |
| 19:18.57 | SpeedEvil | sighs. |
| 19:19.26 | SpeedEvil | I just realized that my brother has a cat called floss, and this may not be a coincidence, |
| 19:24.26 | envogue | *googling floss* |
| 19:24.59 | envogue | ah, not free software? |
| 19:28.47 | SpeedEvil | the licencing terms mean that even writing drivers is problematic |
| 19:33.03 | envogue | is there an alternative? |
| 19:33.10 | envogue | bluetooth is quite expensive isnt it? |
| 19:34.41 | SpeedEvil | it is quite ridiculous that you can get a complete android phone for less than what some Bluetooth modules charge, |
| 19:34.48 | SpeedEvil | what are you wanting to do |
| 19:35.02 | SpeedEvil | Bluetooth to serial modules can be very cheep |
| 19:35.08 | SpeedEvil | as can Nordic semi |
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| 19:36.01 | envogue | well 1st i want to learn zigbee because i think it is interesting. and i want to do some signal processing application using a sensor network. mayeb a sound localizer. fitting? |
| 19:58.07 | _av500_ | SpeedEvil: wifi+BT is $1.5 in China :) |
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