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C Library Reference
A
acl_dup()
Duplicate an access control list (ACL) in a working storage area

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      - abort()
        Raise the SIGABRT signal to terminate program execution
      - abs()
        Return the absolute value of an integer
      - access()
        Check to see if a file or directory can be accessed
      - acl_add_perm()
        Add a permission to an access control list (ACL) permissions set
      - acl_calc_mask()
        Calculate the group class mask for an access control list (ACL)
      - acl_clear_perms()
        Clear all permissions from an ACL permissions set
      - acl_copy_entry()
        Copy the contents of one ACL entry into another
      - acl_copy_ext()
        Copy an ACL from system space to user space
      - acl_copy_int()
        Copy an ACL from user space to system space
      - acl_create_entry()
        Create an entry in an access control list
      - acl_delete_entry()
        Delete an entry from an access control list (ACL)
      - acl_delete_perm()
        Delete a permission from an ACL permissions set
      - acl_dup()
        Duplicate an access control list (ACL) in a working storage area
      - acl_free()
        Free the working storage area allocated for an access control list (ACL) data object
      - acl_from_text()
        Create an access control list (ACL) from text
      - acl_get_entry()
        Get an entry in an access control list (ACL)
      - acl_get_fd()
        Get the access control list associated with a file descriptor
      - acl_get_file()
        Get the ACL for a given path
      - acl_get_perm_np()
        Test whether a given permission is present in an ACL permissions set
      - acl_get_permset()
        Get a permissions set from an ACL entry
      - acl_get_qualifier()
        Get the qualifier from an ACL entry
      - acl_get_tag_type()
        Get the type of tag from an ACL entry
      - acl_init()
        Allocate and initialize an access control list (ACL) working storage area
      - acl_set_fd()
        Set the access ACL for the object associated with a file descriptor
      - acl_set_file()
        Set the access control list for a path
      - acl_set_permset()
        Set the permissions set in an ACL entry
      - acl_set_qualifier()
        Set the qualifier for an ACL entry
      - acl_set_tag_type()
        Set the tag type of an ACL entry
      - acl_size()
        Determine the size of the external form of an ACL
      - acl_to_text()
        Convert an access control list (ACL) into text
      - acl_valid()
        Validate an access control list (ACL)
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        Allocate automatic space from the stack
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        Compare two directory entries
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        The arena size for heap allocations
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        The number of arguments passed to main()
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        A pointer to the vector of arguments passed to main()
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        Convert time information to a string
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        Compute the arcsine of an angle
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        Compute the inverse hyperbolic sine
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        Write formatted output into an allocated string
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        Display a diagnostic message and optionally terminate the program
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        Register functions to be called during program termination via quick_exit()
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        Compute the arctangent of an angle
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        Compute the arctangent, determining the quadrant
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        Compute an inverse hyperbolic tangent
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        Register functions to be called during normal program termination
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        Convert a string into a double
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        Convert a string into an integer
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        Convert a string into a long integer
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        Macros that indicate whether an atomic type is lock-free (C11)
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        Data types for atomic operations (C11)
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        Safely add to a variable (QNX OS)
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        Safely add to a variable, returning the previous value (QNX OS)
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        Safely clear bits in a variable (QNX OS)
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        Safely clear bits in a variable, returning the previous value (QNX OS)
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        Compare and potentially exchange the value of an atomic object (C11)
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        Atomically change the value of an atomic object (C11)
      - atomic_fetch_add(), atomic_fetch_add_explicit()
        Atomically add to the value of an atomic object (C11)
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        Atomically AND a value into an atomic object (C11)
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        Atomically OR a value into an atomic object (C11)
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        Atomically subtract the value of an atomic object (C11)
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        Atomically XOR a value into an atomic object (C11)
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        Atomically clear a flag (C11)
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        Atomically set the value of an atomic object (C11)
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        Safely subtract from a variable (QNX OS)
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        Safely subtract from a variable, returning the previous value (QNX OS)
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        Generic memory order-dependent fence synchronization primitive (C11)
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        Safely toggle bits in a variable (QNX OS)
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        Safely toggle bits in a variable, returning the previous value (QNX OS)
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        A pointer to a vector of auxiliary arguments to main()
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acl_dup()

QNX SDP8.0C Library ReferenceAPIDeveloper

Duplicate an access control list (ACL) in a working storage area

Synopsis:

#include <sys/acl.h>

acl_t acl_dup( acl_t acl );

Arguments:

acl: A pointer to the ACL that you want to duplicate.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The acl_dup() function duplicates an access control list in a working storage area. When you no longer need the new ACL, call acl_free() to release it.

Returns:

A pointer to the copy, or NULL if an error occurred (errno is set).

Errors:

ENOMEM: Not enough memory.

Classification:

QNX OS

This function is based on the withdrawn POSIX draft P1003.1e.


Safety:
Cancellation point	No
Signal handler	No
Thread	Yes

Page updated: August 09, 2024