WHAT(1)

NAME
what - show what versions of object modules were used to construct a file

SYNOPSIS
what [-s] file ...

DESCRIPTION
what reads each file and searches for sequences of either the form ‘$’ immediately followed by the system name (sysname) as defined by uname(3), or the form “@(#)” as inserted by the source code control system (SCCS). It prints the remainder of the string following this marker, up to a NUL, newline, double quote, backslash, or ‘’ character.

If the -s option is specified, only the first occurrence of an identification string in each file is printed.

EXIT STATUS
The what utility exits with a return value of 0 if any identification strings were found, or with a return value of 1 otherwise.

STANDARDS
The what utility is compliant with the xpg4 specification.

HISTORY
The what command appeared in 4.0BSD.

BUGS
As BSD is not licensed to distribute SCCS, this is a rewrite of the what command which is part of SCCS. As such it may not behave exactly the same as that command does.