If the behavior required by POSIX.2, POSIX.2a, XPG4, SUSv2 standards, conflicts with historical Solaris utility behavior, the original Solaris version of the utility is unchanged; a new version that is standard conforming has beenis provided in /usr/xpg4/bin. If the behavior is required by POSIX.1-2001 or SUSv3.
A, a new version that is standard-conforming has beenis provided in /usr/xpg4/bin or /usr/xpg6/bin.
A new version that is SUSv3 standartstandard-conforming has beenis provided in /usr/xpg6/bin.
Example: An application that wants use standard-conforming utilities must set the PATH (sh(1)sh(1) or KSH(1ksh(1)) or path (csh(1)csh(1)) environment variable to specify the appropriate folders necessary.