MKSTR(1) OpenBSD Reference Manual MKSTR(1)NAMEmkstr - create an error message file by massaging C source
SYNOPSISmkstr [-] messagefile prefix file ...
DESCRIPTIONmkstr creates files containing error messages extracted from C source,
and restructures the same C source, to utilize the created error message
file. The intent of mkstr was to reduce the size of large programs and
reduce swapping (see BUGS section below).
mkstr processes each of the specified files, placing a restructured
version of the input in a file whose name consists of the specified
prefix and the original name. A typical usage of mkstr is
$ mkstr pistrings xx *.c
This command causes all the error messages from the C source files in the
current directory to be placed in the file ``pistrings'' and restructured
copies of the sources to be placed in files whose names are prefixed with
``xx''.
The options are as follows:
- Error messages are placed at the end of the specified messagefile
for recompiling part of a large mkstred program.
mkstr finds error messages in the source by searching for the string
`error("' in the input stream. Each time it occurs, the C string
starting at the `"' is stored in the message file followed by a null
character and a newline character. The new source is restructured with
lseek(2) pointers into the error message file for retrieval.
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) {
oops:
perror(efilname);
exit 1 ;
}
}
if (lseek(efil, (long) a1, 0) read(efil, buf, 256) <= 0)
goto oops;
printf(buf, a2, a3, a4);
}
SEE ALSOxstr(1), lseek(2)HISTORYmkstr appeared in 3.0BSD.
BUGSmkstr was intended for the limited architecture of the PDP 11 family.
Very few programs actually use it. The pascal interpreter, pi, and the
editor, ex(1), are two programs that are built this way. It is not an
efficient method; the error messages should be stored in the program
text.
OpenBSD 4.9 August 6, 2007 OpenBSD 4.9
