delproplist man page on DigitalUNIX

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delproplist(3)							delproplist(3)

       delproplist,  fdelproplist  -  removes  Extended File Attributes from a

       #include <sys/proplist.h>

       int delproplist(
	       char *path,
	       int follow,
	       struct proplistname_args *args ); int fdelproplist(
	       int fd,
	       struct proplistname_args *args );

       Points to a file whose Extended File Attributes are to be removed  from
       its  Property  List.  If non-zero, specifies that if the last component
       in path is a symbolic link, then the link should be traversed.	Points
       to  the	proplistname_args  structure,  defined in sys/proplist.h, that
       contains	 the  following	 members:  pl_mask  --	Contains   system-wide
       Extended File Attributes.

	      Note  that  if you are deleting all the Extended File Attributes
	      of a file, pl_mask must equal PLE_FLAG_ALL defined  in  sys/pro‐
	      plist.h.	Also,  if  you	are  deleting  Extended File Attribute
	      options that match certain system-wide Extended File Attributes,
	      the  value of pl_mask should be formed by ORing the desired val‐
	      ues of the system-wide Extended File Attributes.	pl_numnames --
	      Contains	the  number  of Extended File Attributes names held in
	      the names array, pl_names.  pl_names -- Contains a counted array
	      of Extended File Attribute names.

	      Note  that the Extended File Attribute names are null terminated
	      ASCII strings and that the last element of the array must	 be  a
	      null  pointer. Also, a null array pointer indicates all Extended
	      File Attributes.	Specifies a file descriptor that points	 to  a
	      file  whose  Extended File Attributes are to be removed from its
	      Property List. This parameter is used  with  the	fdelproplist()

       The   delproplist()   function	removes	 one  or  more	Extended  File
       Attributes, whose names are specified in the structure  pointed	to  by
       args,  from  the	 Property  List	 of  the  file	pointed to by path. An
       Extended File Attribute is a name and value pair that is contained in a
       variable-sized  structure  called  a  Property List. A Property List is
       part of a file's metadata and can contain abstract name and value pairs
       (Extended File Attributes) that can be set either by the operating sys‐
       tem (for example, ACLs and privileges) or by a  user-level  application
       (for example, PC File Attributes). Note that if you specify a non-exis‐
       tent Extended File Attribute name, the function	will  return  success‐

       The  fdelproplist()  function behaves the same as delproplist(), except
       that it operates on a file descriptor rather than a pointer to a file.

       If a system failure occurs when the Extended File Attributes are	 being
       removed	from  disk, one of the three following conditions may apply to
       each Extended File Attribute because there are no  ordering  guarantees
       when  several  Extended File Attributes are being updated: The Extended
       File Attribute was not  removed	from  the  disk.   The	Extended  File
       Attribute was removed from the disk.

       If  successful, zero is returned, the specified Extended File Attribute
       is deleted from disk, and the change time of the	 file  pointed	to  by
       path is marked for update.

       If  unsuccessful,  the integer -1 is returned and errno is set to indi‐
       cate the error.

       In addition to errors associated with open(2), the function  will  fail
       if: Search permission was denied for a directory in path.

	      The  calling  program  was  not  the  owner  of the file and the
	      process does not have the appropriate system privilege.  A prob‐
	      lem  was	encountered  with the Extended File Attribute name.  A
	      problem was encountered with the Extended File  Attribute	 name.
	      An  error	 occurred while reading or writing some portion of the
	      Property List.  The Extended File Attribute could not be associ‐
	      ated  with the file pointed to by path.  The calling program did
	      not  have	 the  appropriate  system  privilege  to  access   the
	      requested	 Extended  File Attribute, for example, DEC_AUDIT_PRO‐
	      PLISTFLAG.  The file system is mounted read-only.

       #include <sys/proplist.h> main() { char *ptr, *buf, *name, *value;  int
       *value_len, *options, buffer_size, min_buffer_size, ret, nbytes; struct
       proplistname_args entry_names; static  char  *names[]  =	 {	 "pri‐
       mary_name",	"secondary_name",


       .  .  .

	* Delete the property list entries
	*/  if	(delproplist("/tmp/foo", 1, entry_names))      perror("delpro‐
       plist"); free(buf); }

       Functions:  open(2),  add_proplist_entry(3),  delproplist(3),  fdelpro‐
       plist(3), fgetproplist(3), fsetproplist(3), get_proplist_entry(3), get‐
       proplist(3), setproplist(3), sizeof_proplist_entry(3).

       Files: proplist(4), sys/proplist.h.


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