Full Discussion: Strange /etc/passwd output
Top Forums UNIX for Advanced & Expert Users Strange /etc/passwd output Post 302562812 by Corona688 on Saturday 8th of October 2011 11:47:38 AM
Originally Posted by COKEDUDE
On my Fedora system it allowed me to use uppercase letters. Is that a problem?
Here's a trick: Switch to a real terminal (ctrl-alt-f1 through ctrl-alt-f6, ctrl-alt-f7 or f8 gets you back to GUI), and login to a lowercase user in ALLCAPS.

Unless they ripped that out by now, it'll let you do it, and even switch to a special translation mode with no lowercase characters. It's a compatibility mode for really old terminals.

Some things may depend on usernames being all lowercase. Others might not. Best not to tempt fate.
This User Gave Thanks to Corona688 For This Post:
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readkey(3alleg4)						  Allegro manual						  readkey(3alleg4)

readkey - Returns the next character from the keyboard buffer. Allegro game programming library. SYNOPSIS
#include <allegro.h> int readkey(); DESCRIPTION
Returns the next character from the keyboard buffer, in ASCII format. If the buffer is empty, it waits until a key is pressed. You can see if there are queued keypresses with keypressed(). The low byte of the return value contains the ASCII code of the key, and the high byte the scancode. The scancode remains the same whatever the state of the shift, ctrl and alt keys, while the ASCII code is affected by shift and ctrl in the normal way (shift changes case, ctrl+letter gives the position of that letter in the alphabet, eg. ctrl+A = 1, ctrl+B = 2, etc). Pressing alt+key returns only the scan- code, with a zero ASCII code in the low byte. For example: int val; ... val = readkey(); if ((val & 0xff) == 'd') /* by ASCII code */ allegro_message("You pressed 'd' "); if ((val >> 8) == KEY_SPACE) /* by scancode */ allegro_message("You pressed Space "); if ((val & 0xff) == 3) /* ctrl+letter */ allegro_message("You pressed Control+C "); if (val == (KEY_X << 8)) /* alt+letter */ allegro_message("You pressed Alt+X "); This function cannot return character values greater than 255. If you need to read Unicode input, use ureadkey() instead. SEE ALSO
install_keyboard(3alleg4), ureadkey(3alleg4), keypressed(3alleg4), clear_keybuf(3alleg4), simulate_keypress(3alleg4) Allegro version 4.4.2 readkey(3alleg4)

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