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Annotation of researchv10dc/man/manb/mkstr.1, revision 1.1

1.1     ! root        1: .TH MKSTR 1 2/24/79
        !             2: .UC
        !             3: .SH NAME
        !             4: mkstr \- create an error message file by massaging C source
        !             5: .SH SYNOPSIS
        !             6: .B mkstr
        !             7: [
        !             8: .B \-
        !             9: ]
        !            10: messagefile prefix file ...
        !            11: .SH DESCRIPTION
        !            12: .I Mkstr
        !            13: is used to create files of error messages.
        !            14: Its use can make programs with large numbers of error diagnostics much
        !            15: smaller, and reduce system overhead in running the program as the
        !            16: error messages do not have to be constantly swapped in and out.
        !            17: .PP
        !            18: .I Mkstr
        !            19: will process each of the specified
        !            20: .I files,
        !            21: placing a massaged version of the input file in a file whose name
        !            22: consists of the specified
        !            23: .I prefix 
        !            24: and the original name.
        !            25: A typical usage of
        !            26: .I mkstr
        !            27: would be
        !            28: .DT
        !            29: .PP
        !            30:        mkstr pistrings xx *.c
        !            31: .PP
        !            32: This command would cause all the error messages from the C source
        !            33: files in the current directory to be placed in the file
        !            34: .I pistrings
        !            35: and processed copies of the source for these files to be placed in
        !            36: files whose names are prefixed with
        !            37: .I xx.
        !            38: .PP
        !            39: To process the error messages in the source to the message file
        !            40: .I mkstr
        !            41: keys on the string
        !            42: \%`error("'
        !            43: in the input stream.
        !            44: Each time it occurs, the C string starting at the `"' is placed
        !            45: in the message file followed by a null character and a new-line character;
        !            46: the null character terminates the message so it can be easily used
        !            47: when retrieved, the new-line character makes it possible to sensibly
        !            48: .I cat
        !            49: the error message file to see its contents.
        !            50: The massaged copy of the input file then contains a
        !            51: .I lseek
        !            52: pointer into the file which can be used to retrieve the message, i.e.:
        !            53: .IP
        !            54: .DT
        !            55: .nf
        !            56: \fBchar\fR     efilname[] =  "/usr/lib/pi_strings";
        !            57: \fBint\fR      efil = -1;
        !            58: .sp
        !            59: error(a1, a2, a3, a4)
        !            60: {
        !            61:        \fBchar\fR buf[256];
        !            62: 
        !            63:        \fBif\fR (efil < 0) {
        !            64:                efil = open(efilname, 0);
        !            65:                \fBif\fR (efil < 0) {
        !            66: oops:
        !            67:                        perror(efilname);
        !            68:                        exit(1);
        !            69:                }
        !            70:        }
        !            71:        \fBif\fR (lseek(efil, (long) a1, 0) |\|| read(efil, buf, 256) <= 0)
        !            72:                \fBgoto\fR oops;
        !            73:        printf(buf, a2, a3, a4);
        !            74: }
        !            75: .fi
        !            76: .PP
        !            77: The optional
        !            78: .B \-
        !            79: causes the error messages to be placed at the end of the specified
        !            80: message file for recompiling part of a large
        !            81: .IR mkstr \|ed
        !            82: program.
        !            83: .SH SEE\ ALSO
        !            84: lseek(2), xstr(1)
        !            85: .SH AUTHORS
        !            86: William Joy and Charles Haley
        !            87: ...SH BUGS
        !            88: ...All the arguments except the name of the file to be processed could be made unnecessary.

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