mkstr(1)                   DG/UX 4.30                    mkstr(1)



     NAME
          mkstr - create an error message file by massaging C source

     SYNOPSIS
          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);
                         if (efil < 0) {
               oops:
                              perror(efilname);
                              exit(1);
                         }



     Licensed material--property of copyright holder(s)         Page 1

     mkstr(1)                   DG/UX 4.30                    mkstr(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






























     Licensed material--property of copyright holder(s)         Page 2