mkstr(1)
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mkstr Command
create an error message file by massaging C source
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SYNTAX
mkstr [ - ] messagefile prefix file ...
DESCRIPTION
Mkstr is used to create files of error messages. Its use can
make programs with large numbers of error diagnostics much
smaller, and reduce system overhead in running the program as the
error messages do not have to be constantly swapped in and out.
Mkstr will process each of the specified files, placing a
massaged version of the input file in a file whose name consists
of the specified prefix and the original name. A typical usage
of mkstr would be
mkstr pistrings xx *.c
This command would cause all the error messages from the C source
files in the current directory to be placed in the file pistrings
and processed copies of the source for these files to be placed
in files whose names are prefixed with xx.
To process the error messages in the source to the message file
mkstr keys on the string `error("' in the input stream. Each
time it occurs, the C string starting at the `"' is placed in the
message file followed by a null character and a new-line
character; the null character terminates the message so it can be
easily used when retrieved, the new-line character makes it
possible to sensibly cat the error message file to see its
contents. The massaged copy of the input file then contains a
lseek pointer into the file which can be used to retrieve the
message, i.e.:
char efilname[] = "/usr/lib/pistrings";
int efil = -1;
error(a1, a2, a3, a4)
{
char buf[256];
if (efil < 0) {
efil = open(efilname, 0);
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mkstr(1)
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);
}
The optional - causes the error messages to be placed at the end
of the specified message file for recompiling part of a large
mkstr-ed program.
EXAMPLE
If the current directory has files "a.c" and "b.c", then
mkstr exs x *.c
would create a new file "exs" which holds all the error messages
extracted from the source files "a.c" and "b.c", as well as two
new source files, "xa.c" and "xb.c", which no longer contain the
extracted error messages.
SEE ALSO
lseek(2), xstr(1)
AUTHORS
William Joy and Charles Haley
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Licensed material--property of copyright holder(s)