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mkstr.c
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Editing: mkstr.1
.\" Copyright (c) 1980, 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)mkstr.1 8.1 (Berkeley) 6/6/93 .\" $FreeBSD$ .\" .Dd June 6, 2015 .Dt MKSTR 1 .Os .Sh NAME .Nm mkstr .Nd create an error message file by massaging C source .Sh SYNOPSIS .Nm .Op Fl .Ar mesgfile .Ar prefix Ar .Sh DESCRIPTION The .Nm utility creates a file containing error messages extracted from C source, and restructures the same C source, to utilize the created error message file. The intent of .Nm was to reduce the size of large programs and reduce swapping (see .Sx BUGS section below). .Pp The .Nm utility processes each of the specified files, placing a restructured version of the input in a file whose name consists of the specified .Ar prefix and the original name. A typical usage of .Nm is .Pp .Dl "mkstr pistrings xx *.c" .Pp This command causes all the error messages from the C source files in the current directory to be placed in the file .Pa pistrings and restructured copies of the sources to be placed in files whose names are prefixed with .Dq Li xx . .Pp Options: .Bl -tag -width indent .It Fl Error messages are placed at the end of the specified message file for recompiling part of a large .Nm Ns ed program. .El .Pp The .Nm utility finds error messages in the source by searching for the string .Sq Li error(" in the input stream. Each time it occurs, the C string starting at the .Ql \&" is stored in the message file followed by a null character and a new-line character; The new source is restructured with .Xr lseek 2 pointers into the error message file for retrieval. .Bd -literal -offset indent char efilname = "/usr/lib/pi_strings"; int efil = -1; error(a1, a2, a3, a4) { char buf[256]; if (efil < 0) { efil = open(efilname, 0); if (efil < 0) err(1, "%s", efilname); } if (lseek(efil, (off_t)a1, SEEK_SET) < 0 || read(efil, buf, 256) <= 0) err(1, "%s", efilname); printf(buf, a2, a3, a4); } .Ed .Sh SEE ALSO .Xr gencat 1 , .Xr xstr 1 , .Xr lseek 2 .Sh HISTORY The .Nm utility first appeared in .Bx 1 . .Sh AUTHORS .An -nosplit .An Bill Joy and .An Chuck Haley , 1977. .Sh BUGS The .Nm utility was intended for the limited architecture of the PDP 11 family. Very few programs actually use it. The memory savings are negligible in modern computers.
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