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acl_get_entry - retrieve an ACL entry from an ACL

 

NAME

      acl_get_entry - retrieve an ACL entry from an ACL
 

LIBRARY

      Standard C Library (libc, -lc)
 

SYNOPSIS

      #include <sys/types.h>
      #include <sys/acl.h>
 
      int
      acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p);
 

DESCRIPTION

      The acl_get_entry() function is a POSIX.1e call that retrieves a descrip‐
      tor for an ACL entry specified by the argument entry_d within the ACL
      indicated by the argument acl.
 
      If the value of entry_id is ACL_FIRST_ENTRY, then the function will
      return in entry_p a descriptor for the first ACL entry within acl.  If a
      call is made to acl_get_entry() with entry_id set to ACL_NEXT_ENTRY when
      there has not been either an initial successful call to acl_get_entry(),
      or a previous successful call to acl_create_entry(), acl_delete_entry(),
      acl_dup(), acl_from_text(), acl_get_fd(), acl_get_file(), acl_set_fd(),
      acl_set_file(), or acl_valid(), then the result is unspecified.
      If the acl_get_entry() function successfully obtains an ACL entry, a
      value of 1 is returned.  If the ACL has no ACL entries, the
      acl_get_entry() returns a value of 0.  If the value of entry_id is
      ACL_NEXT_ENTRY and the last ACL entry in the ACL has already been
      returned by a previous call to acl_get_entry(), a value of 0 will be
      returned until a successful call with entry_id of ACL_FIRST_ENTRY is
      made.  Otherwise, a value of -1 will be returned and the global variable
      errno will be set to indicate the error.
 

ERRORS

      The acl_get_entry() fails if:
 
      [EINVAL]           Argument acl does not point to a valid ACL.  Argument
                         entry_id is neither ACL_FIRST_ENTRY nor
                         ACL_NEXT_ENTRY.
      acl(3), acl_calc_mask(3), acl_create_entry(3), acl_delete_entry(3),
      acl_dup(3), acl_from_text(3), acl_get_fd(3), acl_get_file(3),
      acl_init(3), acl_set_fd(3), acl_set_file(3), acl_valid(3), posix1e(3)
 

STANDARDS

      POSIX.1e is described in IEEE POSIX.1e draft 17.
 

HISTORY

      POSIX.1e support was introduced in FreeBSD 4.0.  The acl_get_entry()
      function was added in FreeBSD 5.0.
 

AUTHORS

      The acl_get_entry() function was written by Chris D. Faulhaber
      〈jedgar@fxp.org〉.
 

Sections

Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.