what(1)what(1)NAMEwhat - Displays identifying information for Source Code Control System
(SCCS) files
SYNOPSISwhat [-s] file...
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
what: XCU5.0
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
OPTIONS
Searches for just the first occurrence of @(#).
OPERANDS
Pathname of the file to search.
DESCRIPTION
The what command searches the named files for all occurrences of the
pattern that get(1) substitutes for the %Z% keyletter, and writes to
standard output whatever follows the pattern up to, but not including,
the first " (double quote), > (redirection symbol), newline character,
\ (backslash), or null character.
By convention, the value substituted by get(1) for the %Z% keyletter is
@(#). (See the get(1) command or the prs(1) command for a description
of identification keywords.)
If you specify more than one file, each line of output is preceded by
the name of the file it is read from; otherwise, the file name is not
displayed. If no file is specified, what reads from standard input.
The what command is intended for use in conjunction with the get com‐
mand, which automatically inserts the identifying information. You can
also use the what command on files where the information is inserted
manually.
EXIT STATUS
The following exit values are returned: Matches were found. No matches
were found.
EXAMPLES
Suppose that the file test.c contains a C program that includes either
of the following lines:
char ident[ ] = "@(#)Test Program"; #pragma ident "@(#)Test Program"
If you compile test.c to produce test.o and a.out, you could then enter
the following command: what test.c test.o a.out
This command would produce the following displays: test.c: Test
Program test.o: Test Program a.out: Test Program
ENVIRONMENT VARIABLES
The following environment variables affect the execution of what: Pro‐
vides a default value for the internationalization variables that are
unset or null. If LANG is unset or null, the corresponding value from
the default locale is used. If any of the internationalization vari‐
ables contain an invalid setting, the utility behaves as if none of the
variables had been defined. If set to a non-empty string value, over‐
rides the values of all the other internationalization variables.
Determines the locale for the interpretation of sequences of bytes of
text data as characters (for example, single-byte as opposed to multi‐
byte characters in arguments and input files). Determines the locale
for the format and contents of diagnostic messages written to standard
error. Determines the location of message catalogues for the process‐
ing of LC_MESSAGES.
SEE ALSO
Commands: admin(1), cdc(1), comb(1), delta(1), get(1), prs(1),
rmdel(1), sact(1), sccs(1), sccsdiff(1), sccshelp(1), unget(1), val(1)
Files: sccsfile(4)
Standards: standards(5)
Programming Support Tools
what(1)
