1.\" Copyright (c) 1980, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)mkstr.1 8.1 (Berkeley) 6/6/93 33.\" 34.Dd June 6, 1993 35.Dt MKSTR 1 36.Os 37.Sh NAME 38.Nm mkstr 39.Nd create an error message file by massaging C source 40.Sh SYNOPSIS 41.Nm mkstr 42.Op Fl 43.Ar messagefile 44.Ar prefix file ... 45.Sh DESCRIPTION 46.Nm Mkstr 47creates files containing error messages extracted from C source, 48and restructures the same C source, to utilize the created error message 49file. 50The intent of 51.Nm mkstr 52was to reduce the size of large programs and 53reduce swapping (see 54.Sx BUGS 55section below). 56.Pp 57.Nm Mkstr 58processes each of the specified 59.Ar files , 60placing a restructured version of the input in a file whose name 61consists of the specified 62.Ar prefix 63and the original name. 64A typical usage of 65.Nm mkstr 66is 67.Bd -literal -offset indent 68mkstr pistrings xx *.c 69.Ed 70.Pp 71This command causes all the error messages from the C source 72files in the current directory to be placed in the file 73.Ar pistrings 74and restructured copies of the sources to be placed in 75files whose names are prefixed with 76.Ar \&xx . 77.Pp 78Options: 79.Bl -tag -width indent 80.It Fl 81Error messages are placed at the end of the specified 82message file for recompiling part of a large 83.Nm mkstr 84ed 85program. 86.El 87.Pp 88.Nm mkstr 89finds error messages in the source by 90searching for the string 91.Li \&`error("' 92in the input stream. 93Each time it occurs, the C string starting at the 94.Sq \&"\& 95is stored 96in the message file followed by a null character and a new-line character; 97The new source is restructured with 98.Xr lseek 2 99pointers into the error message file for retrieval. 100.Bd -literal -offset indent 101char efilname = "/usr/lib/pi_strings"; 102int efil = -1; 103 104error(a1, a2, a3, a4) 105\&{ 106 char buf[256]; 107 108 if (efil < 0) { 109 efil = open(efilname, 0); 110 if (efil < 0) { 111oops: 112 perror(efilname); 113 exit 1 ; 114 } 115 } 116 if (lseek(efil, (long) a1, 0) \ read(efil, buf, 256) <= 0) 117 goto oops; 118 printf(buf, a2, a3, a4); 119} 120.Ed 121.Sh SEE ALSO 122.Xr lseek 2 , 123.Xr xstr 1 124.Sh HISTORY 125.Nm Mkstr 126appeared in 127.Bx 3.0 . 128.Sh BUGS 129.Nm mkstr 130was intended for the limited architecture of the PDP 11 family. 131Very few programs actually use it. The pascal interpreter, 132.Xr \&pi 1 133and the editor, 134.Xr \&ex 1 135are two programs that are built this way. 136It is not an efficient method, the error messages 137should be stored in the program text. 138