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List:       busybox
Subject:    [BusyBox] [PATCH] (tinylogin 1.02) set passwords from script
From:       Torrey Hoffman <thoffman () arnor ! net>
Date:       2002-07-25 15:50:06
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I find it useful to be able to change passwords from a script.  Here is
a patch to the passwd applet of tinylogin 1.02 which adds a "-p" option
that allows you to do that.

If there is some other way to achieve this, I'd like to know about it.

Torrey Hoffman
thoffman@arnor.net
torrey.hoffman@myrio.com



diff -urN -X dontdiff tinylogin-1.02-vanilla/passwd.c tinylogin-1.02/passwd.c
--- tinylogin-1.02-vanilla/passwd.c	Thu Jan  3 02:39:44 2002
+++ tinylogin-1.02/passwd.c	Thu Jul 25 14:22:36 2002
@@ -19,6 +19,7 @@
 
 static int create_backup(const char *backup, FILE * fp);
 static int new_password(const struct passwd *pw, int amroot, int algo);
+static int encrypt_password(char *pass, int algo);
 static void set_filesize_limit();
 

@@ -48,6 +49,8 @@
 	int lflg = 0;				/* -l - lock account */
 	int uflg = 0;				/* -u - unlock account */
 	int dflg = 0;				/* -d - delete password */
+	int pflg = 0;				/* -p - set password from argument */
+	char pass[9];
 	const struct passwd *pw;
 	unsigned short ruid;
 
@@ -56,11 +59,16 @@
 #endif							/* TLG_FEATURE_SHADOWPASSWDS */
 	amroot = (getuid() == 0);
 	openlog("passwd", LOG_PID | LOG_CONS | LOG_NOWAIT, LOG_AUTH);
-	while ((flag = getopt(argc, argv, "a:dlu")) != EOF) {
+	while ((flag = getopt(argc, argv, "a:p:dlu")) != EOF) {
 		switch (flag) {
 		case 'a':
 			algo = get_algo(optarg);
 			break;
+		case 'p':
+                        pflg++;
+			// copy at most 8 chars from option, forces null termination.
+			STRFCPY(pass, optarg);
+			break;
 		case 'd':
 			dflg++;
 			break;
@@ -109,7 +117,7 @@
 #endif							/* TLG_FEATURE_SHADOWPASSWDS */
 
 	STRFCPY(crypt_passwd, cp);
-	if (!(dflg || lflg || uflg)) {
+	if (!(dflg || lflg || uflg || pflg)) {
 		if (!amroot) {
 			if (cp[0] == '!') {
 				syslog(LOG_WARNING, "password locked for `%s'", np);
@@ -120,6 +128,13 @@
 		if (new_password(pw, amroot, algo)) {
 			error_msg_and_die( "The password for %s is unchanged.\n", name);
 		}
+	} else if (pflg) {
+		if (!amroot) 
+			error_msg_and_die("Only root can set passwords via command line.\n");
+		if (strlen(pass) < 6)
+			error_msg_and_die("Sorry, minimum password length is 5.\n");
+		printf("Changing password for %s\n",name);
+		encrypt_password(pass,algo);
 	} else if (lflg) {
 		if (crypt_passwd[0] != '!') {
 			memmove(&crypt_passwd[1], crypt_passwd,
@@ -394,6 +409,13 @@
 	}
 	bzero(cp, strlen(cp));
 	bzero(orig, sizeof(orig));
+
+	return encrypt_password(pass, algo);
+}
+
+static int encrypt_password(char *pass, int algo)
+{
+	char *cp;
 
 #ifdef TLG_FEATURE_SHA1_PASSWORDS
 	if (algo == 2) {




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