src/: Use xasprintf() instead of its pattern

Signed-off-by: Alejandro Colomar <alx@kernel.org>

lib/obscure.c

@@ -21,6 +21,7 @@
 #include "prototypes.h"
 #include "defines.h"
 #include "getdef.h"
+#include "string/sprintf/xasprintf.h"
 
 #if WITH_LIBBSD == 0
 #include "freezero.h"
@@ -99,9 +100,7 @@ static /*@observer@*//*@null@*/const char *password_check (
 
 	newmono = str_lower (xstrdup (new));
 	oldmono = str_lower (xstrdup (old));
-	wrapped = XMALLOC(strlen(oldmono) * 2 + 1, char);
+	xasprintf(&wrapped, "%s%s", oldmono, oldmono);
-	strcpy (wrapped, oldmono);
-	strcat (wrapped, oldmono);
 
 	if (palindrome (oldmono, newmono)) {
 		msg = _("a palindrome");

src/passwd.c

@@ -22,7 +22,6 @@
 
 #include "alloc.h"
 #include "agetpass.h"
-#include "alloc.h"
 #include "atoi/str2i.h"
 #include "defines.h"
 #include "getdef.h"
@@ -34,6 +33,7 @@
 #include "pwio.h"
 #include "shadowio.h"
 #include "shadowlog.h"
+#include "string/sprintf/xasprintf.h"
 #include "string/strcpy/strtcpy.h"
 #include "time/day_to_str.h"
 
@@ -532,10 +532,9 @@ static char *update_crypt_pw (char *cp)
 	}
 
 	if (lflg && *cp != '!') {
-		char *newpw = XMALLOC(strlen(cp) + 2, char);
+		char  *newpw;
 
-		strcpy (newpw, "!");
+		xasprintf(&newpw, "!%s", cp);
-		strcat (newpw, cp);
 		if (!use_pam)
 		{
 			if (do_update_pwd) {

src/su.c

@@ -60,6 +60,7 @@
 #include "exitcodes.h"
 #include "shadowlog.h"
 #include "string/sprintf/snprintf.h"
+#include "string/sprintf/xasprintf.h"
 #include "string/strcpy/strtcpy.h"
 
 
@@ -1201,17 +1202,14 @@ int main (int argc, char **argv)
 	 * case they will be provided to the new user's shell as arguments.
 	 */
 	if (fakelogin) {
-		char *arg0;
+		char  *arg0;
 
 		cp = getdef_str ("SU_NAME");
 		if (NULL == cp) {
 			cp = Basename (shellstr);
 		}
 
-		arg0 = XMALLOC(strlen(cp) + 2, char);
+		xasprintf(&arg0, "-%s", cp);
-		arg0[0] = '-';
-		strcpy (arg0 + 1, cp);
-		cp = arg0;
 	} else {
 		cp = Basename (shellstr);
 	}

src/usermod.c

@@ -412,15 +412,14 @@ usage (int status)
 static char *new_pw_passwd (char *pw_pass)
 {
 	if (Lflg && ('!' != pw_pass[0])) {
-		char *buf = XMALLOC(strlen(pw_pass) + 2, char);
+		char  *buf;
 
 #ifdef WITH_AUDIT
 		audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
 		              "updating passwd", user_newname, user_newid, 0);
 #endif
 		SYSLOG ((LOG_INFO, "lock user '%s' password", user_newname));
-		strcpy (buf, "!");
+		xasprintf(&buf, "!%s", pw_pass);
-		strcat (buf, pw_pass);
 		pw_pass = buf;
 	} else if (Uflg && pw_pass[0] == '!') {
 		if (pw_pass[1] == '\0') {