diff --git a/ls.c b/ls.c

index 0898576..e9829d9 100644

--- a/ls.c

+++ b/ls.c

@@ -502,7 +502,7 @@ build_dir_line(struct mystr* p_str, const struct mystr* p_filename_str,

   }

   else

   {

-    int uid = vsf_sysutil_statbuf_get_uid(p_stat);

+    unsigned int uid = vsf_sysutil_statbuf_get_uid(p_stat);

     struct vsf_sysutil_user* p_user = 0;

     if (tunable_text_userdb_names)

     {

@@ -527,7 +527,7 @@ build_dir_line(struct mystr* p_str, const struct mystr* p_filename_str,

   }

   else

   {

-    int gid = vsf_sysutil_statbuf_get_gid(p_stat);

+    unsigned int gid = vsf_sysutil_statbuf_get_gid(p_stat);

     struct vsf_sysutil_group* p_group = 0;

     if (tunable_text_userdb_names)

     {

diff --git a/privops.c b/privops.c

index 21d7267..f27c5c4 100644

--- a/privops.c

+++ b/privops.c

@@ -236,8 +236,7 @@ vsf_privop_do_file_chown(struct vsf_session* p_sess, int fd)

   /* Drop it like a hot potato unless it's a regular file owned by

    * the the anonymous ftp user

    */

-  if (p_sess->anon_upload_chown_uid == -1 ||

-      !vsf_sysutil_statbuf_is_regfile(s_p_statbuf) ||

+  if (!vsf_sysutil_statbuf_is_regfile(s_p_statbuf) ||

       (vsf_sysutil_statbuf_get_uid(s_p_statbuf) != p_sess->anon_ftp_uid &&

        vsf_sysutil_statbuf_get_uid(s_p_statbuf) != p_sess->guest_user_uid))

   {

diff --git a/session.h b/session.h

index b60e098..4eccf46 100644

--- a/session.h

+++ b/session.h

@@ -56,9 +56,9 @@ struct vsf_session

   struct mystr_list* p_visited_dir_list;

   /* Details of userids which are interesting to us */

-  int anon_ftp_uid;

-  int guest_user_uid;

-  int anon_upload_chown_uid;

+  unsigned int anon_ftp_uid;

+  unsigned int guest_user_uid;

+  unsigned int anon_upload_chown_uid;

   /* Things we need to cache before we chroot() */

   struct mystr banned_email_str;

diff --git a/sysutil.c b/sysutil.c

index 24c4a81..954e901 100644

--- a/sysutil.c

+++ b/sysutil.c

@@ -1485,14 +1485,14 @@ vsf_sysutil_statbuf_get_size(const struct vsf_sysutil_statbuf* p_statbuf)

   return p_stat->st_size;

 }

-int

+unsigned int

 vsf_sysutil_statbuf_get_uid(const struct vsf_sysutil_statbuf* p_statbuf)

 {

   const struct stat* p_stat = (const struct stat*) p_statbuf;

   return p_stat->st_uid;

 }

-int

+unsigned int

 vsf_sysutil_statbuf_get_gid(const struct vsf_sysutil_statbuf* p_statbuf)

 {

   const struct stat* p_stat = (const struct stat*) p_statbuf;

@@ -1533,7 +1533,7 @@ vsf_sysutil_statbuf_get_sortkey_mtime(

 }

 void

-vsf_sysutil_fchown(const int fd, const int uid, const int gid)

+vsf_sysutil_fchown(const int fd, const unsigned int uid, const unsigned int gid)

 {

   if (fchown(fd, uid, gid) != 0)

   {

@@ -2351,13 +2351,9 @@ vsf_sysutil_dns_resolve(struct vsf_sysutil_sockaddr** p_sockptr,

 }

 struct vsf_sysutil_user*

-vsf_sysutil_getpwuid(const int uid)

+vsf_sysutil_getpwuid(const unsigned int uid)

 {

-  if (uid < 0)

-  {

-    bug("negative uid in vsf_sysutil_getpwuid");

-  }

-  return (struct vsf_sysutil_user*) getpwuid((unsigned int) uid);

+  return (struct vsf_sysutil_user*) getpwuid(uid);

 }

 struct vsf_sysutil_user*

@@ -2380,14 +2376,14 @@ vsf_sysutil_user_get_homedir(const struct vsf_sysutil_user* p_user)

   return p_passwd->pw_dir;

 }

-int

+unsigned int

 vsf_sysutil_user_getuid(const struct vsf_sysutil_user* p_user)

 {

   const struct passwd* p_passwd = (const struct passwd*) p_user;

   return p_passwd->pw_uid;

 }

-int

+unsigned int

 vsf_sysutil_user_getgid(const struct vsf_sysutil_user* p_user)

 { 

   const struct passwd* p_passwd = (const struct passwd*) p_user;

@@ -2395,13 +2391,9 @@ vsf_sysutil_user_getgid(const struct vsf_sysutil_user* p_user)

 }

 struct vsf_sysutil_group*

-vsf_sysutil_getgrgid(const int gid)

+vsf_sysutil_getgrgid(const unsigned int gid)

 {

-  if (gid < 0)

-  {

-    die("negative gid in vsf_sysutil_getgrgid");

-  }

-  return (struct vsf_sysutil_group*) getgrgid((unsigned int) gid);

+  return (struct vsf_sysutil_group*) getgrgid(gid);

 }

 const char*

@@ -2476,25 +2468,17 @@ vsf_sysutil_setgid_numeric(int gid)

   }

 }

-int

+unsigned int

 vsf_sysutil_geteuid(void)

 {

-  int retval = geteuid();

-  if (retval < 0)

-  {

-    die("geteuid");

-  }

+  unsigned int retval = geteuid();

   return retval;

 }

-int

+unsigned int

 vsf_sysutil_getegid(void)

 {

-  int retval = getegid();

-  if (retval < 0)

-  {

-    die("getegid");

-  }

+  unsigned int retval = getegid();

   return retval;

 }

@@ -2885,7 +2869,7 @@ vsf_sysutil_ftruncate(int fd)

   }

 }

-int

+unsigned int

 vsf_sysutil_getuid(void)

 {

   return getuid();

diff --git a/sysutil.h b/sysutil.h

index 399c921..b745d4a 100644

--- a/sysutil.h

+++ b/sysutil.h

@@ -130,15 +130,15 @@ const char* vsf_sysutil_statbuf_get_numeric_date(

   const struct vsf_sysutil_statbuf* p_stat, int use_localtime);

 unsigned int vsf_sysutil_statbuf_get_links(

   const struct vsf_sysutil_statbuf* p_stat);

-int vsf_sysutil_statbuf_get_uid(const struct vsf_sysutil_statbuf* p_stat);

-int vsf_sysutil_statbuf_get_gid(const struct vsf_sysutil_statbuf* p_stat);

+unsigned int vsf_sysutil_statbuf_get_uid(const struct vsf_sysutil_statbuf* p_stat);

+unsigned int vsf_sysutil_statbuf_get_gid(const struct vsf_sysutil_statbuf* p_stat);

 int vsf_sysutil_statbuf_is_readable_other(

   const struct vsf_sysutil_statbuf* p_stat);

 const char* vsf_sysutil_statbuf_get_sortkey_mtime(

   const struct vsf_sysutil_statbuf* p_stat);

 int vsf_sysutil_chmod(const char* p_filename, unsigned int mode);

-void vsf_sysutil_fchown(const int fd, const int uid, const int gid);

+void vsf_sysutil_fchown(const int fd, const unsigned int uid, const unsigned int gid);

 void vsf_sysutil_fchmod(const int fd, unsigned int mode);

 int vsf_sysutil_readlink(const char* p_filename, char* p_dest,

                          unsigned int bufsiz);

@@ -292,15 +292,15 @@ int vsf_sysutil_inet_aton(

 struct vsf_sysutil_user;

 struct vsf_sysutil_group;

-struct vsf_sysutil_user* vsf_sysutil_getpwuid(const int uid);

+struct vsf_sysutil_user* vsf_sysutil_getpwuid(const unsigned int uid);

 struct vsf_sysutil_user* vsf_sysutil_getpwnam(const char* p_user);

 const char* vsf_sysutil_user_getname(const struct vsf_sysutil_user* p_user);

 const char* vsf_sysutil_user_get_homedir(

   const struct vsf_sysutil_user* p_user);

-int vsf_sysutil_user_getuid(const struct vsf_sysutil_user* p_user);

-int vsf_sysutil_user_getgid(const struct vsf_sysutil_user* p_user);

+unsigned int vsf_sysutil_user_getuid(const struct vsf_sysutil_user* p_user);

+unsigned int vsf_sysutil_user_getgid(const struct vsf_sysutil_user* p_user);

-struct vsf_sysutil_group* vsf_sysutil_getgrgid(const int gid);

+struct vsf_sysutil_group* vsf_sysutil_getgrgid(const unsigned int gid);

 const char* vsf_sysutil_group_getname(const struct vsf_sysutil_group* p_group);

 /* More random things */

@@ -318,7 +318,7 @@ void vsf_sysutil_qsort(void* p_base, unsigned int num_elem,

 char* vsf_sysutil_getenv(const char* p_var);

 typedef void (*exitfunc_t)(void);

 void vsf_sysutil_set_exit_func(exitfunc_t exitfunc);

-int vsf_sysutil_getuid(void);

+unsigned int vsf_sysutil_getuid(void);

 /* Syslogging (bah) */

 void vsf_sysutil_openlog(int force);

@@ -331,8 +331,8 @@ void vsf_sysutil_setuid(const struct vsf_sysutil_user* p_user);

 void vsf_sysutil_setgid(const struct vsf_sysutil_user* p_user);

 void vsf_sysutil_setuid_numeric(int uid);

 void vsf_sysutil_setgid_numeric(int gid);

-int vsf_sysutil_geteuid(void);

-int vsf_sysutil_getegid(void);

+unsigned int vsf_sysutil_geteuid(void);

+unsigned int vsf_sysutil_getegid(void);

 void vsf_sysutil_seteuid(const struct vsf_sysutil_user* p_user);

 void vsf_sysutil_setegid(const struct vsf_sysutil_user* p_user);

 void vsf_sysutil_seteuid_numeric(int uid);