slock/config.def.h

/* user and group to drop privileges to */
static const char *user  = "nobody";
static const char *group = "nogroup";

static const char *colorname[NUMCOLS] = {
	"black",     /* after initialization */
	"#005577",   /* during input */
	"#CC3333",   /* wrong password */
};

/* treat a cleared input like a wrong password */
static const int failonclear = 1;
Ensure Polyphemus-Mitigation and properly drop privileges Don't hide privilege drops inside readpw() and actually make it configurable what you are dropping to in config.h. The privilege drop comes after opening the Display because the user "nobody" with "nogroup" can't do that. So why do I call this strategy the Polyphemus-Mitigation? """ After the giant returns in the evening and eats two more of the men, Odysseus offers Polyphemus some strong and undiluted wine given to him earlier on his journey. Drunk and unwary, the giant asks Odysseus his name, promising him a guest-gift if he answers. Odysseus tells him "Οὖτις", which means "nobody" and Polyphemus promises to eat this "Nobody" last of all. With that, he falls into a drunken sleep. Odysseus had meanwhile hardened a wooden stake in the fire and now drives it into Polyphemus' eye. When Polyphemus shouts for help from his fellow giants, saying that "Nobody" has hurt him, they think Polyphemus is being afflicted by divine power and recommend prayer as the answer. """ (source: https://en.wikipedia.org/wiki/Polyphemus) 2016-09-07 11:32:29 +00:00			`/* user and group to drop privileges to */`
			`static const char *user = "nobody";`
			`static const char *group = "nogroup";`

Blank the screen with color 0, add third color for failed logins - Adds another color in config.def.h, COLOR_INIT - Renames the colours from numerical ones to ones with meaningful names; COLOR_INPUT for when there is content in the input buffer and COLOR_EMPTY for when the input buffer has been cleared (backspaced or a failed attempt). - Ensures XFreeColors frees the right number of colours. This is now derived from the size of `Lock->colors` rather than being an integer literal. - Makes slock exhibit the behaviour described by Markus The default colours are the same as the ones slock currently uses, with the exception of the new color, which I have set to red, as it indicates someone has either failed an attempt to unlock, or that they have entered input and erased it all. 2015-02-11 22:56:35 +00:00			`static const char *colorname[NUMCOLS] = {`
			`"black", /* after initialization */`
			`"#005577", /* during input */`
Clarify config.def.h Clear up the wording a bit and explain what failonclear means. 2016-02-14 00:32:02 +00:00			`"#CC3333", /* wrong password */`
Blank the screen with color 0, add third color for failed logins - Adds another color in config.def.h, COLOR_INIT - Renames the colours from numerical ones to ones with meaningful names; COLOR_INPUT for when there is content in the input buffer and COLOR_EMPTY for when the input buffer has been cleared (backspaced or a failed attempt). - Ensures XFreeColors frees the right number of colours. This is now derived from the size of `Lock->colors` rather than being an integer literal. - Makes slock exhibit the behaviour described by Markus The default colours are the same as the ones slock currently uses, with the exception of the new color, which I have set to red, as it indicates someone has either failed an attempt to unlock, or that they have entered input and erased it all. 2015-02-11 22:56:35 +00:00			`};`
Clarify config.def.h Clear up the wording a bit and explain what failonclear means. 2016-02-14 00:32:02 +00:00
			`/* treat a cleared input like a wrong password */`
			`static const int failonclear = 1;`