more splitting of server.c

created dosmode.c and filename.c
(This used to be commit 534a90ca44641417c21f6ed6d4b94b1de60f808d)

1 files changed, 202 insertions, 0 deletions

diff --git a/source3/smbd/dosmode.c b/source3/smbd/dosmode.c
new file mode 100644
index 0000000000..c1af18d80b
--- /dev/null
+++ b/source3/smbd/dosmode.c
@@ -0,0 +1,202 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   dos mode handling functions
+   Copyright (C) Andrew Tridgell 1992-1998
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+/****************************************************************************
+  change a dos mode to a unix mode
+    base permission for files:
+         everybody gets read bit set
+         dos readonly is represented in unix by removing everyone's write bit
+         dos archive is represented in unix by the user's execute bit
+         dos system is represented in unix by the group's execute bit
+         dos hidden is represented in unix by the other's execute bit
+         Then apply create mask,
+         then add force bits.
+    base permission for directories:
+         dos directory is represented in unix by unix's dir bit and the exec bit
+         Then apply create mask,
+         then add force bits.
+****************************************************************************/
+mode_t unix_mode(connection_struct *conn,int dosmode)
+{
+  mode_t result = (S_IRUSR | S_IRGRP | S_IROTH);
+
+  if ( !IS_DOS_READONLY(dosmode) )
+    result |= (S_IWUSR | S_IWGRP | S_IWOTH);
+ 
+  if (IS_DOS_DIR(dosmode)) {
+    /* We never make directories read only for the owner as under DOS a user
+       can always create a file in a read-only directory. */
+    result |= (S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH | S_IWUSR);
+    /* Apply directory mask */
+    result &= lp_dir_mode(SNUM(conn));
+    /* Add in force bits */
+    result |= lp_force_dir_mode(SNUM(conn));
+  } else { 
+    if (lp_map_archive(SNUM(conn)) && IS_DOS_ARCHIVE(dosmode))
+      result |= S_IXUSR;
+
+    if (lp_map_system(SNUM(conn)) && IS_DOS_SYSTEM(dosmode))
+      result |= S_IXGRP;
+ 
+    if (lp_map_hidden(SNUM(conn)) && IS_DOS_HIDDEN(dosmode))
+      result |= S_IXOTH;  
+ 
+    /* Apply mode mask */
+    result &= lp_create_mode(SNUM(conn));
+    /* Add in force bits */
+    result |= lp_force_create_mode(SNUM(conn));
+  }
+  return(result);
+}
+
+
+/****************************************************************************
+  change a unix mode to a dos mode
+****************************************************************************/
+int dos_mode(connection_struct *conn,char *path,struct stat *sbuf)
+{
+  int result = 0;
+  extern struct current_user current_user;
+
+  DEBUG(8,("dos_mode: %s\n", path));
+
+  if (CAN_WRITE(conn) && !lp_alternate_permissions(SNUM(conn))) {
+    if (!((sbuf->st_mode & S_IWOTH) ||
+	  conn->admin_user ||
+	  ((sbuf->st_mode & S_IWUSR) && current_user.uid==sbuf->st_uid) ||
+	  ((sbuf->st_mode & S_IWGRP) && 
+	   in_group(sbuf->st_gid,current_user.gid,
+		    current_user.ngroups,current_user.groups))))
+      result |= aRONLY;
+  } else {
+    if ((sbuf->st_mode & S_IWUSR) == 0)
+      result |= aRONLY;
+  }
+
+  if (MAP_ARCHIVE(conn) && ((sbuf->st_mode & S_IXUSR) != 0))
+    result |= aARCH;
+
+  if (MAP_SYSTEM(conn) && ((sbuf->st_mode & S_IXGRP) != 0))
+    result |= aSYSTEM;
+
+  if (MAP_HIDDEN(conn) && ((sbuf->st_mode & S_IXOTH) != 0))
+    result |= aHIDDEN;   
+  
+  if (S_ISDIR(sbuf->st_mode))
+    result = aDIR | (result & aRONLY);
+
+#ifdef S_ISLNK
+#if LINKS_READ_ONLY
+  if (S_ISLNK(sbuf->st_mode) && S_ISDIR(sbuf->st_mode))
+    result |= aRONLY;
+#endif
+#endif
+
+  /* hide files with a name starting with a . */
+  if (lp_hide_dot_files(SNUM(conn)))
+    {
+      char *p = strrchr(path,'/');
+      if (p)
+	p++;
+      else
+	p = path;
+      
+      if (p[0] == '.' && p[1] != '.' && p[1] != 0)
+	result |= aHIDDEN;
+    }
+
+  /* Optimization : Only call is_hidden_path if it's not already
+     hidden. */
+  if (!(result & aHIDDEN) && IS_HIDDEN_PATH(conn,path))
+  {
+    result |= aHIDDEN;
+  }
+
+  DEBUG(8,("dos_mode returning "));
+
+  if (result & aHIDDEN) DEBUG(8, ("h"));
+  if (result & aRONLY ) DEBUG(8, ("r"));
+  if (result & aSYSTEM) DEBUG(8, ("s"));
+  if (result & aDIR   ) DEBUG(8, ("d"));
+  if (result & aARCH  ) DEBUG(8, ("a"));
+
+  DEBUG(8,("\n"));
+
+  return(result);
+}
+
+/*******************************************************************
+chmod a file - but preserve some bits
+********************************************************************/
+int dos_chmod(connection_struct *conn,char *fname,int dosmode,struct stat *st)
+{
+  struct stat st1;
+  int mask=0;
+  int tmp;
+  int unixmode;
+
+  if (!st) {
+    st = &st1;
+    if (sys_stat(fname,st)) return(-1);
+  }
+
+  if (S_ISDIR(st->st_mode)) dosmode |= aDIR;
+
+  if (dos_mode(conn,fname,st) == dosmode) return(0);
+
+  unixmode = unix_mode(conn,dosmode);
+
+  /* preserve the s bits */
+  mask |= (S_ISUID | S_ISGID);
+
+  /* preserve the t bit */
+#ifdef S_ISVTX
+  mask |= S_ISVTX;
+#endif
+
+  /* possibly preserve the x bits */
+  if (!MAP_ARCHIVE(conn)) mask |= S_IXUSR;
+  if (!MAP_SYSTEM(conn)) mask |= S_IXGRP;
+  if (!MAP_HIDDEN(conn)) mask |= S_IXOTH;
+
+  unixmode |= (st->st_mode & mask);
+
+  /* if we previously had any r bits set then leave them alone */
+  if ((tmp = st->st_mode & (S_IRUSR|S_IRGRP|S_IROTH))) {
+    unixmode &= ~(S_IRUSR|S_IRGRP|S_IROTH);
+    unixmode |= tmp;
+  }
+
+  /* if we previously had any w bits set then leave them alone 
+   if the new mode is not rdonly */
+  if (!IS_DOS_READONLY(dosmode) &&
+      (tmp = st->st_mode & (S_IWUSR|S_IWGRP|S_IWOTH))) {
+    unixmode &= ~(S_IWUSR|S_IWGRP|S_IWOTH);
+    unixmode |= tmp;
+  }
+
+  return(sys_chmod(fname,unixmode));
+}
+