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Full Discussion: Lseek implementation
Top Forums UNIX for Dummies Questions & Answers Lseek implementation Post 302554901 by fpmurphy on Tuesday 13th of September 2011 10:13:00 AM
Old 09-13-2011
POSIX specifies programming APIs. It is silent on the implementation of those APIs.

However, the behavior you see if what I would expect. Writes by their very nature are going to take longer than reads. Reads can come from cache. Writes cannot.
 

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acl_trivial(3SEC)				       File Access Control Library Functions					 acl_trivial(3SEC)

NAME
acl_trivial - determine whether a file has a trivial ACL SYNOPSIS
cc [ flag... ] file... -lsec [ library... ] #include <sys/acl.h> int acl_trivial(char *path); DESCRIPTION
The acl_trivial() function is used to determine whether a file has a trivial ACL. Whether an ACL is trivial depends on the type of the ACL. A POSIX draft ACL is trivial if it has greater than MIN_ACL_ENTRIES. An NFSv4/ZFS-style ACL is trivial if it either has entries other than owner@, group@, and everyone@, has inheritance flags set, or is not ordered in a manner that meets POSIX access control requirements. RETURN VALUES
Upon successful completion, acl_trivial() returns 0 if the file's ACL is trivial and 1 if the file's ACL is not trivial. If it could not be determined whether a file's ACL is trivial, -1 is returned and errno is set to indicate the error. ERRORS
The acl_trivial() function will fail if: EACCES A file's ACL could not be read. ENOENT A component of path does not name an existing file or path is an empty string. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
acl(5), attributes(5) SunOS 5.11 6 Oct 2005 acl_trivial(3SEC)
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