int main(int    argc,
         char **argv)
 {
 char        *filein, *str, *tempfile, *prestring, *outprotos, *protostr;
 const char  *spacestr = " ";
char         buf[L_BUFSIZE];
 l_uint8     *allheaders;
 l_int32      i, maxindex, in_line, nflags, protos_added, firstfile, len, ret;
 size_t       nbytes;
L_BYTEA     *ba, *ba2;
SARRAY      *sa, *safirst;
static char  mainName[] = "xtractprotos";

    if (argc == 1) {
        fprintf(stderr,
                "xtractprotos [-prestring=<string>] [-protos=<where>] "
                "[list of C files]\n"
                "where the prestring is prepended to each prototype, and \n"
                "protos can be either 'inline' or the name of an output "
                "prototype file\n");
        return 1;
    }

    /* ---------------------------------------------------------------- */
    /* Parse input flags and find prestring and outprotos, if requested */
    /* ---------------------------------------------------------------- */
    prestring = outprotos = NULL;
    in_line = FALSE;
    nflags = 0;
    maxindex = L_MIN(3, argc);
    for (i = 1; i < maxindex; i++) {
         if (argv[i][0] == '-') {
             if (!strncmp(argv[i], "-prestring", 10)) {
                 nflags++;
                ret = sscanf(argv[i] + 1, "prestring=%490s", buf);
                 if (ret != 1) {
                     fprintf(stderr, "parse failure for prestring\n");
                     return 1;
                 }
                if ((len = strlen(buf)) > L_BUFSIZE - 3) {
                     L_WARNING("prestring too large; omitting!\n", mainName);
                 } else {
                     buf[len] = ' ';
                    buf[len + 1] = '\0';
                    prestring = stringNew(buf);
                 }
             } else if (!strncmp(argv[i], "-protos", 7)) {
                 nflags++;
                ret = sscanf(argv[i] + 1, "protos=%490s", buf);
                 if (ret != 1) {
                     fprintf(stderr, "parse failure for protos\n");
                     return 1;
                }
                outprotos = stringNew(buf);
                if (!strncmp(outprotos, "inline", 7))
                    in_line = TRUE;
            }
        }
    }

    if (argc - nflags < 2) {
        fprintf(stderr, "no files specified!\n");
        return 1;
    }


    /* ---------------------------------------------------------------- */
    /*                   Generate the prototype string                  */
    /* ---------------------------------------------------------------- */
    ba = l_byteaCreate(500);

         /* First the extern C head */
     sa = sarrayCreate(0);
     sarrayAddString(sa, (char *)"/*", L_COPY);
    snprintf(buf, L_BUFSIZE,
              " *  These prototypes were autogen'd by xtractprotos, v. %s",
              version);
     sarrayAddString(sa, buf, L_COPY);
    sarrayAddString(sa, (char *)" */", L_COPY);
    sarrayAddString(sa, (char *)"#ifdef __cplusplus", L_COPY);
    sarrayAddString(sa, (char *)"extern \"C\" {", L_COPY);
    sarrayAddString(sa, (char *)"#endif  /* __cplusplus */\n", L_COPY);
    str = sarrayToString(sa, 1);
    l_byteaAppendString(ba, str);
    lept_free(str);
    sarrayDestroy(&sa);

        /* Then the prototypes */
    firstfile = 1 + nflags;
    protos_added = FALSE;
    if ((tempfile = l_makeTempFilename()) == NULL) {
        fprintf(stderr, "failure to make a writeable temp file\n");
        return 1;
    }
    for (i = firstfile; i < argc; i++) {
        filein = argv[i];
         len = strlen(filein);
         if (filein[len - 1] == 'h')  /* skip .h files */
             continue;
        snprintf(buf, L_BUFSIZE, "cpp -ansi -DNO_PROTOS %s %s",
                  filein, tempfile);
         ret = system(buf);  /* cpp */
         if (ret) {
            fprintf(stderr, "cpp failure for %s; continuing\n", filein);
            continue;
        }

        if ((str = parseForProtos(tempfile, prestring)) == NULL) {
            fprintf(stderr, "parse failure for %s; continuing\n", filein);
            continue;
        }
        if (strlen(str) > 1) {  /* strlen(str) == 1 is a file without protos */
            l_byteaAppendString(ba, str);
            protos_added = TRUE;
        }
        lept_free(str);
    }
    lept_rmfile(tempfile);
    lept_free(tempfile);

        /* Lastly the extern C tail */
    sa = sarrayCreate(0);
    sarrayAddString(sa, (char *)"\n#ifdef __cplusplus", L_COPY);
    sarrayAddString(sa, (char *)"}", L_COPY);
    sarrayAddString(sa, (char *)"#endif  /* __cplusplus */", L_COPY);
    str = sarrayToString(sa, 1);
    l_byteaAppendString(ba, str);
    lept_free(str);
    sarrayDestroy(&sa);

    protostr = (char *)l_byteaCopyData(ba, &nbytes);
    l_byteaDestroy(&ba);


    /* ---------------------------------------------------------------- */
    /*                       Generate the output                        */
    /* ---------------------------------------------------------------- */
    if (!outprotos) {  /* just write to stdout */
        fprintf(stderr, "%s\n", protostr);
        lept_free(protostr);
        return 0;
    }

        /* If no protos were found, do nothing further */
    if (!protos_added) {
        fprintf(stderr, "No protos found\n");
        lept_free(protostr);
        return 1;
    }

        /* Make the output files */
    ba = l_byteaInitFromFile("allheaders_top.txt");
    if (!in_line) {
        snprintf(buf, sizeof(buf), "#include \"%s\"\n", outprotos);
        l_byteaAppendString(ba, buf);
        l_binaryWrite(outprotos, "w", protostr, nbytes);
    } else {
        l_byteaAppendString(ba, protostr);
    }
    ba2 = l_byteaInitFromFile("allheaders_bot.txt");
    l_byteaJoin(ba, &ba2);
    l_byteaWrite("allheaders.h", ba, 0, 0);
    l_byteaDestroy(&ba);
    lept_free(protostr);
    return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.