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Access (3)
  • >> Access (3) ( Solaris man: Библиотечные вызовы )
  • 
    _________________________________________________________________
    
    NAME
         Tcl_Access, Tcl_Stat -  check  file  permissions  and  other
         attributes
    
    SYNOPSIS
         #include <tcl.h>
    
         int
         Tcl_Access(path, mode)
    
         int
         Tcl_Stat(path, statPtr)
    
    ARGUMENTS
         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   exe-
                                     cute  permissions, respectively.
                                     F_OK just requests checking  for
                                     the existence of the file.
    
         stat   *statPtr   (out)     The structure that contains  the
                                     result.
    _________________________________________________________________
    
    
    DESCRIPTION
         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  func-
         tions  fixes  some  bugs in the system level calls.  Second,
         both    Tcl_Access    and    Tcl_Stat    (as     well     as
         Tcl_OpenFileChannelProc)  hook  into  a linked list of func-
         tions.  This allows the possibity to reroute file access  to
         alternative media or access methods.
    
         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 pathname.   If  pathname  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  regarding  device,
         inode  (always 0 on Windows), priviledge 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.
    
    
    KEYWORDS
         stat access
    
    
    
    


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