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Tcl_Access(3)		    Tcl	Library	Procedures		 Tcl_Access(3)


       Tcl_Access, Tcl_Stat - check file permissions and other attributes

       #include	<tcl.h>

       Tcl_Access(path,	mode)

       Tcl_Stat(path, statPtr)

       char *path (in)			  Native name of the file to check the
					  attributes of.

       int mode	(in)			  Mask consisting of one  or  more  of
					  R_OK,	 W_OK,	X_OK  and  F_OK. R_OK,
					  W_OK	and  X_OK   request   checking
					  whether  the	file  exists  and  has
					  read,	write and execute permissions,
					  respectively.	  F_OK just requests a
					  check	for the	existence of the file.

       struct stat *statPtr (out)	  The structure	that contains the  re-

       As of Tcl 8.4, the object-based APIs Tcl_FSAccess and Tcl_FSStat	should
       be used in preference to	Tcl_Access and	Tcl_Stat,  wherever  possible.
       Those  functions	 also  support	Tcl's  virtual filesystem layer, which
       these do	not.

       There are two reasons for calling Tcl_Access and	Tcl_Stat  rather  than
       calling	system	level  functions access	and stat directly.  First, the
       Windows implementation of both functions	fixes some bugs	in the	system
       level calls. Second, both Tcl_Access and	Tcl_Stat (as well as Tcl_Open-
       FileChannelProc)	hook into a linked list	of functions. This allows  the
       possibility to reroute file access to alternative media or access meth-

       Tcl_Access checks whether the process would be allowed to  read,	 write
       or  test	 for existence of the file (or other file system object) whose
       name is path. If	path is	a symbolic link	on Unix, then  permissions  of
       the file	referred by this symbolic link are tested.

       On  success  (all  requested permissions	granted), zero is returned. On
       error (at least one bit in mode asked for a permission that is  denied,
       or some other error occurred), -1 is returned.

       Tcl_Stat	 fills	the  stat structure statPtr with information about the
       specified file. You do not need any access rights to the	 file  to  get
       this information	but you	need search rights to all directories named in
       the path	leading	to the file. The stat structure	includes info  regard-
       ing  device, inode (always 0 on Windows), privilege mode, nlink (always
       1 on Windows), user id (always 0	on Windows), group  id	(always	 0  on
       Windows),  rdev	(same  as  device on Windows), size, last access time,
       last modification time, and creation time.

       If path exists, Tcl_Stat	returns	0 and the  stat	 structure  is	filled
       with data. Otherwise, -1	is returned, and no stat info is given.

       stat, access

       Tcl_FSAccess(3),	Tcl_FSStat(3)

Tcl				      8.1			 Tcl_Access(3)


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