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    Command:

    acl_get_qualifier

    
    
    
    

    SYNOPSIS

         #include <sys/types.h>
         #include <sys/acl.h>
    
         void *
         acl_get_qualifier(acl_entry_t entry_d);
    
    
    

    DESCRIPTION

         The acl_get_qualifier() function retrieves the qualifier from the ACL
         entry indicated by the argument entry_d into working storage and returns
         a pointer to that storage.
    
         If the value of the tag type in the ACL entry referred to by entry_d is
         ACL_USER, then the value returned by acl_get_qualifier() is a pointer to
         type uid_t.  If the value of the tag type in the ACL entry referred to by
         entry_d is ACL_GROUP, then the value returned by acl_get_qualifier() is a
         pointer to type gid_t.  If the tag type in the ACL entry referred to by
         entry_d is a tag type for which a qualifier is not supported,
         acl_get_qualifier() returns a value of (void *)NULL and the function
         fails. Subsequent operations using the returned pointer operate on an
         independent copy of the qualifier in working storage, and will not change
         the qualifier of the ACL entry.
    
         This function may cause memory to be allocated. The caller should free
         any releasable memory, when the new qualifier is no longer required, by
         calling acl_free() with the void * value returned by acl_get_qualifier()
         as an argument.
    
         The argument entry_d and any other ACL entry descriptors that refer to
         entries within the ACL containing the entry referred to by entry_d con-
         tinue to refer to those entries. The order of all existing entries in the
         ACL containing the entry referred to by entry_d remains unchanged.
    
    
    

    RETURN VALUE

         On success, the function returns a pointer to the tag qualifier that was
         retrieved into ACL working storage. On error, a value of (void *)NULL is
         returned and errno is set appropriately.
    
    
    

    ERRORS

         If any of the following conditions occur, the acl_get_qualifier() func-
         tion returns (void *)NULL and sets errno to the corresponding value:
    
         [EINVAL]           The argument entry_d is not a valid descriptor for an
                            ACL entry.
    
                            The value of the tag type in the ACL entry referenced
                            by the argument entry_d is neither ACL_USER nor
                            ACL_GROUP.
    
         [ENOMEM]           The value to be returned requires more memory than is
                            allowed by the hardware or system-imposed memory man-
    
    
    

    Linux ACL March 23, 2002 Linux ACL

    
    
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