first commit

README.md

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+# BusyBox, Orwellian Edition
+
+Given that states and countries are now requiring that operating systems report
+the age of users, it is important that BusyBox be able to comply. Why? BusyBox
+is used in embedded devices that qualify for regulation under these bills (such
+as California's [AB-1043](https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202520260AB1043)).
+For most hardware, this would actually amount to just reporting epoc for root,
+as most devices won't directly have users. Applications on those may, but those
+usually have their own user management features.
+
+This patch adds the `-b` option to BusyBox's adduser, and will record a birthday
+in YYYYMMDD format. This can then be used to determine age, and/or the age
+bracket of the user via the standard UNIX shell which serves as the UNIX
+API/ABI, and thus makes BusyBox compliant with the law. The two UNIX commands
+added here are `howoldami` and `useragerange`.

adduser.bday.patch

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+--- loginutils/adduser.c.orig
++++ loginutils/adduser.c
+@@ -44,6 +44,7 @@
+ //usage:     "\n	-H		Don't create home directory"
+ //usage:     "\n	-u UID		User id"
+ //usage:     "\n	-k SKEL		Skeleton directory (/etc/skel)"
++//usage:     "\n	-b DOB		Date of birth (YYYYMMDD)"
+ 
+ #include "libbb.h"
+ 
+@@ -61,6 +62,7 @@
+ #define OPT_DONT_MAKE_HOME (1 << 6)
+ #define OPT_UID            (1 << 7)
+ #define OPT_SKEL           (1 << 8)
++#define OPT_DOB            (1 << 9)
+ 
+ /* remix */
+ /* recoded such that the uid may be passed in *p */
+@@ -128,6 +130,7 @@
+ 		"no-create-home\0"      No_argument       "H"
+ 		"uid\0"                 Required_argument "u"
+ 		"skel\0"                Required_argument "k"
++		"dob\0"                 Required_argument "b"
+ 		;
+ 
+ /*
+@@ -141,6 +144,7 @@
+ 	unsigned opts;
+ 	char *uid;
+ 	const char *skel = "/etc/skel";
++	char *dob = NULL;
+ 
+ 	/* got root? */
+ 	if (geteuid()) {
+@@ -151,12 +155,12 @@
+ 	pw.pw_dir = NULL;
+ 
+ 	opts = getopt32long(argv, "^"
+-			"h:g:s:G:DSHu:k:"
++			"h:g:s:G:DSHu:k:b:"
+ 			/* at least one and at most two non-option args */
+ 			/* disable interactive passwd for system accounts */
+ 			"\0" "-1:?2:SD",
+ 			adduser_longopts,
+-			&pw.pw_dir, &pw.pw_gecos, &pw.pw_shell,
+-			&usegroup, &uid, &skel
++			&pw.pw_dir, &pw.pw_gecos, &pw.pw_shell,
++			&usegroup, &uid, &skel, &dob
+ 	);
+ 	if (opts & OPT_UID)
+@@ -200,6 +204,16 @@
+ 		free(p);
+ #endif
+ 
++	/* Record date of birth if specified */
++	if (opts & OPT_DOB) {
++		FILE *f = fopen("/etc/birthdays", "a");
++		if (f) {
++			fprintf(f, "%s:x:%s:\n", pw.pw_name, dob);
++			fclose(f);
++		} else {
++			bb_perror_msg("/etc/birthdays");
++		}
++	}
++
+ 	/* add to group */
+ 	addgroup_wrapper(&pw, usegroup);

bin/howoldami

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+#!/bin/bash
+username=$(whoami)
+dob=$(grep $username /etc/birthdays | cut -f 3 -d ':')
+today=$(date +%Y%m%d)
+age=$(echo "$today - $dob" | bc -l | cut -f 1 -d '.')
+printf "%s%b" "$age" "\n"

bin/useragerange

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+#!/bin/bash
+age=$(howoldami)
+
+if [ $age -lt 13 ]; then
+	echo "User is under the age of 13."
+elif [ $age -ge 13 ] && [ $age -lt 16 ]; then
+	echo "User is under the age of 16, but at least 13."
+elif [ $age -ge 16 ] && [ $age -lt 18 ]; then
+	echo "User is at least 16, but younger than 18."
+else
+	echo "User is over 18"
+fi

etc/birthdays

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+# username:x:YYYYMMDD:
+root:x:19700101: