add --prefix option

lib/commonio.c

@@ -375,21 +375,30 @@ bool commonio_present (const struct commonio_db *db)
 
 int commonio_lock_nowait (struct commonio_db *db, bool log)
 {
-	char file[1024];
-	char lock[1024];
+	char* file;
+	char* lock;
+	size_t lock_file_len;
+	size_t file_len;
 
 	if (db->locked) {
 		return 1;
 	}
-
-	snprintf (file, sizeof file, "%s.%lu",
+	file_len = strlen(db->filename) + 11;/* %lu max size */
+	lock_file_len = strlen(db->filename) + 6; /* sizeof ".lock" */
+	file = (char*)malloc(file_len);
+	lock = (char*)malloc(lock_file_len);
+	snprintf (file, file_len, "%s.%lu",
 	          db->filename, (unsigned long) getpid ());
-	snprintf (lock, sizeof lock, "%s.lock", db->filename);
+	snprintf (lock, lock_file_len, "%s.lock", db->filename);
 	if (do_lock_file (file, lock, log) != 0) {
 		db->locked = true;
 		lock_count++;
+		free(file);
+		free(lock);
 		return 1;
 	}
+	free(file);
+	free(lock);
 	return 0;
 }
 

lib/getdef.c

@@ -155,7 +155,7 @@ static struct itemdef knowndef_table[] = {
 #define LOGINDEFS "/etc/login.defs"
 #endif
 
-static char def_fname[] = LOGINDEFS;	/* login config defs file       */
+static const char* def_fname = LOGINDEFS;	/* login config defs file       */
 static bool def_loaded = false;		/* are defs already loaded?     */
 
 /* local function prototypes */
@@ -424,6 +424,17 @@ out:
 	return (struct itemdef *) NULL;
 }
 
+/*
+ * setdef_config_file - set the default configuration file path
+ *
+ * must be called prior to any def* calls.
+ */
+
+void setdef_config_file (const char* file)
+{
+	def_fname = file;
+}
+
 /*
  * def_load - load configuration table
  *

lib/getdef.h

@@ -40,6 +40,7 @@ extern unsigned long getdef_ulong (const char *, unsigned long);
 extern unsigned int getdef_unum (const char *, unsigned int);
 extern /*@observer@*/ /*@null@*/const char *getdef_str (const char *);
 extern int putdef_str (const char *, const char *);
+extern void setdef_config_file (const char* file);
 
 /* default UMASK value if not specified in /etc/login.defs */
 #define		GETDEF_DEFAULT_UMASK	022

lib/prototypes.h

@@ -271,6 +271,21 @@ extern void do_pam_passwd (const char *user, bool silent, bool change_expired);
 /* port.c */
 extern bool isttytime (const char *, const char *, time_t);
 
+/* prefix_flag.c */
+extern const char* process_prefix_flag (const char* short_opt, int argc, char **argv);
+extern struct group *prefix_getgrnam(const char *name);
+extern struct group *prefix_getgrgid(gid_t gid);
+extern struct passwd *prefix_getpwuid(uid_t uid);
+extern struct passwd *prefix_getpwnam(const char* name);
+extern struct spwd *prefix_getspnam(const char* name);
+extern struct group *prefix_getgr_nam_gid(const char *grname);
+extern void prefix_setpwent();
+extern struct passwd* prefix_getpwent();
+extern void prefix_endpwent();
+extern void prefix_setgrent();
+extern struct group* prefix_getgrent();
+extern void prefix_endgrent();
+
 /* pwd2spwd.c */
 #ifndef USE_PAM
 extern struct spwd *pwd_to_spwd (const struct passwd *);