what(CP)

what -- identify SCCS files

Syntax

what [-s] files

Description

The what command searches the given files for all occurrences of the pattern that get(CP) substitutes for %Z% (@(#)) and prints out what follows until the first occurrence of any of the following: ", >, new-line, \, or null character. For example, assuming that a C program in file f.c contains:

char ident[] = "@(#)identification information";

If f.c is compiled to yield f.o and a.out, then the command:

what -s f.c f.o a.out

will print

f.c:: identification information
f.o:: identification information
a.out:: identification information

The what command is intended to be used in conjunction with the SCCS command get(CP), which automatically inserts identifying information, but it can also be used where the information is inserted manually. Only one option is accepted:

-s: Quit after finding the first occurrence of pattern in each file.

Diagnostics

Exit status is 0 if any matches are found, otherwise 1.

Notes

It is possible that an unintended occurrence of the pattern @(#) could be found just by chance, but this causes no harm in nearly all cases.

Standards conformance