General Commands Manual
NAME what — search files for SCCS identifiers
utility reads each file
operand and searches for sequences of the form “@(#)” as inserted by the source code control system. It prints the remainder of the string following this marker, up to a null character, 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 0 if any matches were found, and 1 otherwise.
STANDARDS The what utility conforms to X/Open Portability Guide Issue 4, Version 2 (“XPG4.2”).
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, and may not behave exactly the same as that command does.