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Annotation of coherent/b/STREAMS/conf_79/mklink.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Create a compile/link manifest for the system kernel based on the
        !             3:  * configured devices and the presence of files in the configuration
        !             4:  * directories.
        !             5:  */
        !             6: 
        !             7: /*
        !             8:  *-IMPORTS:
        !             9:  *     <sys/compat.h>
        !            10:  *             CONST
        !            11:  *             USE_PROTO
        !            12:  *             ARGS ()
        !            13:  *     <stdio.h>
        !            14:  *             NULL
        !            15:  *             stdin
        !            16:  *             stdout
        !            17:  *             fopen ()
        !            18:  *             fclose ()
        !            19:  *             fputs ()
        !            20:  *             fputc ()
        !            21:  *     <stdlib.h>
        !            22:  *             getenv ()
        !            23:  *     <time.h>
        !            24:  *             time_t
        !            25:  *             localtime ()
        !            26:  *             time ()
        !            27:  *     <string.h>
        !            28:  *             strerror ()
        !            29:  *             strftime ()
        !            30:  *     "ehand.h"
        !            31:  *             ehand_t
        !            32:  *             PUSH_HANDLER ()
        !            33:  *             POP_HANDLER ()
        !            34:  *             CHAIN_ERROR ()
        !            35:  *             throw_error ()
        !            36:  *     "buildobj.h"
        !            37:  *             build_t
        !            38:  *             builder_alloc ()
        !            39:  *             builder_free ()
        !            40:  *             build_begin ()
        !            41:  *             build_add ()
        !            42:  *             build_end ()
        !            43:  *             build_release ()
        !            44:  *             build_error ()
        !            45:  *     "mdev.h"
        !            46:  *             MD_ENABLED
        !            47:  *             mdev_t
        !            48:  *             mdevices ()
        !            49:  *     "symbol.h"
        !            50:  *             symbol_t
        !            51:  *     "read.h"
        !            52:  *             READ_EOF
        !            53:  *             input_t
        !            54:  *             read_char ()
        !            55:  *             read_error ()
        !            56:  *             read_close ()
        !            57:  *     "mkinput.h"
        !            58:  *             make_file_input ()
        !            59:  */
        !            60: 
        !            61: #include <sys/compat.h>
        !            62: #include <stdio.h>
        !            63: #include <stdlib.h>
        !            64: #include <time.h>
        !            65: #include <string.h>
        !            66: 
        !            67: #include "ehand.h"
        !            68: #include "buildobj.h"
        !            69: #include "mdev.h"
        !            70: #include "symbol.h"
        !            71: #include "read.h"
        !            72: #include "mkinput.h"
        !            73: 
        !            74: #include "mkconf.h"
        !            75: 
        !            76: /*
        !            77:  * For entries that are OS-specific, wrap up the choice in a macro.
        !            78:  */
        !            79: 
        !            80: #ifdef __MSDOS__
        !            81: 
        !            82: #define        DOS_OR_UNIX(dos,unix)   dos
        !            83: 
        !            84: #else
        !            85: 
        !            86: #define        DOS_OR_UNIX(dos, unix)  unix
        !            87: 
        !            88: #endif
        !            89: 
        !            90: 
        !            91: /*
        !            92:  * Testing for the existence of a file may seem simple, but there are some
        !            93:  * subtleties that can trip the unwary, such as which function to use to test
        !            94:  * for the existence of the object?
        !            95:  *
        !            96:  *  + fopen () is in ISO C and checks for (a) existence of the named object,
        !            97:  *    (b) whether it is readable. It may return a useful value in 'errno'
        !            98:  *    which can be used to (i) issue diagnostics in the user's local language,
        !            99:  *    (ii) cope with specific kinds of error gracefully, since support for an
        !           100:  *    E... code defined in an extension to C library behaviour such as POSIX.1
        !           101:  *    can be tested for with the #ifdef directive.
        !           102:  *  - fopen () can be slow.
        !           103:  *
        !           104:  *  + access () can test quickly for readability and existence, is present in
        !           105:  *    POSIX.1.
        !           106:  *  - access () isn't in ISO C, and some older Unix systems do things rather
        !           107:  *    differently than POSIX specifies.
        !           108:  *
        !           109:  *  + fstat () returns all the information that access () does, and more. It
        !           110:  *    is older and more likely to be present as a local extension to C in non-
        !           111:  *    POSIX systems. fstat () can distinguish between real files and file-like
        !           112:  *    objects such as named pipes.
        !           113:  *  - It is usually possible to fstat () objects that cannot be accessed,
        !           114:  *    which means extra complexity such as getuid () if restrictive
        !           115:  *    permissions are set up. Testing for unusual objects such as pipes may
        !           116:  *    reduce portability to systems which don't possess such objects.
        !           117:  *
        !           118:  * Additional considerations when using a system that may involve a large
        !           119:  * directory tree is whether to walk the tree with chdir () rather than
        !           120:  * building large pathnames which require expensive rescanning by the
        !           121:  * operating system, and so forth.
        !           122:  *
        !           123:  * This file uses fopen () and simple macro-substitution in pathnames, since
        !           124:  * performance is a lesser concern than portability. As for permissions, the
        !           125:  * user of this program should be highly priveleged in order to be able to
        !           126:  * specify the contents of the kernel code; the user has to be able to read
        !           127:  * the files we scan for in order to compile or link them during the actual
        !           128:  * kernel build phase.
        !           129:  */
        !           130: 
        !           131: struct macro_spec {
        !           132:        char            ms_macrochar;   /* character after '%' sign */
        !           133:        CONST char    * ms_envname;     /* environment variable to override */
        !           134:        CONST char    * ms_default;
        !           135:        CONST char    * ms_value;               /* Actual value */
        !           136: } macros [] = {
        !           137:        { 'p' },                                /* built at run-time */
        !           138:        { 'P', "CONFPATH", DOS_OR_UNIX (".", ".") },
        !           139:        { 'T', "TMP", DOS_OR_UNIX (".", ".") },
        !           140:        { 'o', "OBJEXT", DOS_OR_UNIX ("obj", "o") },
        !           141:        { 'O', "LIBEXT", DOS_OR_UNIX ("lib", "a") },
        !           142:        { 'c', "CEXT", DOS_OR_UNIX ("c", "c") },
        !           143:        { 'C', "CPPEXT", DOS_OR_UNIX ("cpp", "cc") }
        !           144: };
        !           145: 
        !           146: 
        !           147: /*
        !           148:  * Since all the entries in the "make_spec" are strings which we want to treat
        !           149:  * in a uniform way, we arrange things as an array rather than a structure.
        !           150:  */
        !           151: 
        !           152: enum {
        !           153:        TEST_FILE,
        !           154:        LINK_ENTRY,
        !           155:        COMPILE_RULES,
        !           156:        CLEAN_ENTRY,
        !           157: 
        !           158:        MAKE_MAX
        !           159: };
        !           160: 
        !           161: 
        !           162: /*
        !           163:  * Special entries for use to mean "*exactly* the same as" some previously
        !           164:  * generated entry. This save generating multiple copies of the macroexpanded
        !           165:  * text to save memory.
        !           166:  */
        !           167: 
        !           168: CONST char SAME_AS [MAKE_MAX] [1];
        !           169: 
        !           170: 
        !           171: /*
        !           172:  * Structure of make specifications. The macroexpanded versions are kept
        !           173:  * around so that the strings can be emitted in appropriate phases of the
        !           174:  * make-file generation.
        !           175:  */
        !           176: 
        !           177: typedef        struct make_spec        make_t;
        !           178: 
        !           179: struct make_spec {
        !           180:        CONST char    * m_specs [MAKE_MAX];
        !           181:        make_t        * m_next;
        !           182: };
        !           183: 
        !           184: make_t config_commands [] = {
        !           185:        { { "%P/%p/Driver.%O", "%P/%p/Driver.%O ", NULL, NULL } },
        !           186:        { { "%P/%p/Driver.%o", "%P/%p/Driver.%o ", NULL, NULL } },
        !           187:        { { "%P/%p/Space.%c", "%T/%p.%o ",
        !           188:                "%2: %1\n\t$(CC) $(CFLAGS) -o"
        !           189:                        DOS_OR_UNIX ("", " ") "%2 -c %1\n\n",
        !           190:                SAME_AS [LINK_ENTRY] } },
        !           191:        { { "%P/%p/Space.%C", "%T/%p.%o",
        !           192:                "%2: %1\n\t$(CC) $(CFLAGS) -o"
        !           193:                        DOS_OR_UNIX ("", " ") "%2 -c %1\n\n",
        !           194:                SAME_AS [LINK_ENTRY] } }
        !           195: };
        !           196: 
        !           197: make_t stub_commands [] = {
        !           198:        { { "%P/%p/Stub.%o", "%P/%p/Stub.%o ", NULL, NULL } }
        !           199: };
        !           200: 
        !           201: #define        ARRAY_LENGTH(a)         (sizeof (a) / sizeof (* a))
        !           202: 
        !           203: 
        !           204: /*
        !           205:  * Check the named file for existence.
        !           206:  */
        !           207: 
        !           208: #ifdef USE_PROTO
        !           209: LOCAL int file_exists (CONST char * name)
        !           210: #else
        !           211: LOCAL int
        !           212: file_exists ARGS ((name))
        !           213: CONST char    *        name;
        !           214: #endif
        !           215: {
        !           216:        FILE          * temp;
        !           217: 
        !           218:        if ((temp = fopen (name, "r")) == NULL)
        !           219:                return 0;
        !           220: 
        !           221:        fclose (temp);
        !           222:        return 1;
        !           223: }
        !           224: 
        !           225: 
        !           226: /*
        !           227:  * Set up macros, checking environment variables and selecting defaults. This
        !           228:  * function also sets up the 'prefix' macro variable.
        !           229:  */
        !           230: 
        !           231: #ifdef USE_PROTO
        !           232: LOCAL void (init_macros) (CONST char * prefix)
        !           233: #else
        !           234: LOCAL void
        !           235: init_macros ARGS ((prefix))
        !           236: CONST char    *        prefix;
        !           237: #endif
        !           238: {
        !           239:        int             i;
        !           240: 
        !           241:        for (i = 0 ; i < ARRAY_LENGTH (macros) ; i ++) {
        !           242: 
        !           243:                if (macros [i].ms_envname == NULL)
        !           244:                        macros [i].ms_value = prefix;
        !           245: 
        !           246:                if (macros [i].ms_value == NULL &&
        !           247:                    (macros [i].ms_value =
        !           248:                                getenv (macros [i].ms_envname)) == NULL)
        !           249:                        macros [i].ms_value = macros [i].ms_default;
        !           250:        }
        !           251: }
        !           252: 
        !           253: 
        !           254: /*
        !           255:  * Macroexpand a single entry in a make specification.
        !           256:  */
        !           257: 
        !           258: #ifdef USE_PROTO
        !           259: LOCAL void (expand_line) (make_t * spec, make_t * target, build_t * heap,
        !           260:                          int line)
        !           261: #else
        !           262: LOCAL void
        !           263: expand_line ARGS ((spec, target, heap, line))
        !           264: make_t       * spec;
        !           265: make_t       * target;
        !           266: build_t              * heap;
        !           267: int            line;
        !           268: #endif
        !           269: {
        !           270:        int             i;
        !           271:        CONST char    * scan;
        !           272: 
        !           273:        /*
        !           274:         * Check to see if the spec wants to be identical to a
        !           275:         * previous entry.
        !           276:         */
        !           277: 
        !           278:        scan = spec->m_specs [line];
        !           279: 
        !           280:        for (i = 0 ; i < line ; i ++)
        !           281:                if (scan == SAME_AS [i]) {
        !           282: 
        !           283:                        target->m_specs [line] = target->m_specs [i];
        !           284:                        return;
        !           285:                }
        !           286: 
        !           287:        /*
        !           288:         * We will need to build a new entry in the heap.
        !           289:         */
        !           290: 
        !           291:        if ((i = build_begin (heap, 0, NULL)) != 0)
        !           292:                throw_error ("Cannot begin make line, error %s",
        !           293:                             build_error (i));
        !           294: 
        !           295:        for (;;) {
        !           296:                CONST char    * start;
        !           297:                char            ch;
        !           298: 
        !           299:                /*
        !           300:                 * Begin by moving any constant stuff to the output.
        !           301:                 */
        !           302: 
        !           303:                start = scan;
        !           304: 
        !           305:                while ((ch = * scan ++) != 0 && ch != '%')
        !           306:                        ;       /* DO NOTHING */
        !           307: 
        !           308:                /*
        !           309:                 * If we have hit the last character in the source string,
        !           310:                 * add that into the section we copy to the output, since it
        !           311:                 * make manipulating the strings simpler :-).
        !           312:                 */
        !           313: 
        !           314:                if ((i = scan - start - (ch != 0)) > 0 &&
        !           315:                    (i == build_add (heap, i, start)) != 0)
        !           316:                        throw_error ("Unable to add to make macro, error %s",
        !           317:                                     build_error (i));
        !           318: 
        !           319:                if (ch == 0) {
        !           320:                        /*
        !           321:                         * End the macro generation and record the start
        !           322:                         * address of the generated text in the output record.
        !           323:                         */
        !           324: 
        !           325:                        if ((target->m_specs [line] =
        !           326:                                        build_end (heap, NULL)) == NULL)
        !           327:                                throw_error ("Error ending make macro");
        !           328:                        return;
        !           329:                }
        !           330: 
        !           331: 
        !           332:                /*
        !           333:                 * To get here we must have hit a '%'-sign, so deal with it.
        !           334:                 *
        !           335:                 * Our test for the numeric macros assumes that the digits
        !           336:                 * have consecutive character codes in the executuion
        !           337:                 * environment.
        !           338:                 */
        !           339: 
        !           340:                ch = * scan ++;
        !           341: 
        !           342:                if (ch == 0)
        !           343:                        throw_error ("Bad macro specification in expand_line ()");
        !           344:                else if (ch > '0' && ch - '1' < line)
        !           345:                        start = target->m_specs [ch - '1'];
        !           346:                else if (ch == '%')
        !           347:                        start = "%";
        !           348:                else {
        !           349:                        /*
        !           350:                         * Scan the macro table for a match on 'ch'.
        !           351:                         */
        !           352: 
        !           353:                        start = NULL;
        !           354: 
        !           355:                        for (i = 0 ; i < ARRAY_LENGTH (macros) ; i ++)
        !           356:                                if (macros [i].ms_macrochar == ch) {
        !           357: 
        !           358:                                        start = macros [i].ms_value;
        !           359:                                        break;
        !           360:                                }
        !           361:                }
        !           362: 
        !           363: 
        !           364:                /*
        !           365:                 * Copy the macro expansion to the destination.
        !           366:                 */
        !           367: 
        !           368:                if (start != NULL &&
        !           369:                    (i = build_add (heap, strlen (start), start)) != 0)
        !           370:                        throw_error ("Unable to add to make macro, error %s",
        !           371:                                     build_error (i));
        !           372:        }
        !           373: }
        !           374: 
        !           375: 
        !           376: /*
        !           377:  * Macroexpand the make specification template, building the target macros in
        !           378:  * a build heap. If the file named by the first line does not exist, then
        !           379:  * discard that name and return, otherwise expand the rest of the macros and
        !           380:  * return an indication that the caller should record this entry.
        !           381:  */
        !           382: 
        !           383: #ifdef USE_PROTO
        !           384: LOCAL int (expand_spec) (make_t * spec, make_t * target, build_t * heap)
        !           385: #else
        !           386: LOCAL int
        !           387: expand_spec ARGS ((spec, target, heap))
        !           388: make_t       * spec;
        !           389: make_t       * target;
        !           390: build_t              * heap;
        !           391: #endif
        !           392: {
        !           393:        int             i;
        !           394: 
        !           395:        expand_line (spec, target, heap, TEST_FILE);
        !           396: 
        !           397:        if (! file_exists (target->m_specs [TEST_FILE])) {
        !           398: 
        !           399:                if (build_release (heap, target->m_specs [TEST_FILE]) != 0)
        !           400:                        throw_error ("Cannot release macro memory in expand_spec ()");
        !           401: 
        !           402:                return 0;
        !           403:        }
        !           404: 
        !           405:        for (i = TEST_FILE + 1 ; i < MAKE_MAX ; i ++) {
        !           406: 
        !           407:                if (spec->m_specs [i] == NULL) {
        !           408: 
        !           409:                        target->m_specs [i] = NULL;
        !           410:                        continue;
        !           411:                }
        !           412: 
        !           413:                expand_line (spec, target, heap, i);
        !           414:        }
        !           415: 
        !           416:        return 1;
        !           417: }
        !           418: 
        !           419: 
        !           420: /*
        !           421:  * This function builds up part of a makefile specification.
        !           422:  */
        !           423: 
        !           424: #ifdef USE_PROTO
        !           425: LOCAL make_t * (make_make) (build_t * heap, CONST char * prefix,
        !           426:                            make_t * specs, int nspecs, make_t * makelist)
        !           427: #else
        !           428: LOCAL make_t *
        !           429: make_make ARGS ((heap, prefix, specs, nspecs, makelist))
        !           430: build_t              * heap;
        !           431: CONST char    *        prefix;
        !           432: make_t       * specs;
        !           433: int            nspecs;
        !           434: make_t       * makelist;
        !           435: #endif
        !           436: {
        !           437:        int             i;
        !           438:        make_t          temp;
        !           439:        make_t        * scan;
        !           440: 
        !           441:        init_macros (prefix);
        !           442: 
        !           443:        for (i = 0 ; i < nspecs ; i ++) {
        !           444:                /*
        !           445:                 * Expand the specifications, and then test to see if the file
        !           446:                 * named by the first part of the expanded specification
        !           447:                 * exists.
        !           448:                 */
        !           449: 
        !           450:                if (expand_spec (specs + i, & temp, heap)) {
        !           451:                        /*
        !           452:                         * Add the specification to the list of items to be
        !           453:                         * included in the makefile. We do a quick scan for
        !           454:                         * duplicate file-name strings, just for paranoia.
        !           455:                         */
        !           456: 
        !           457:                        for (scan = makelist ; scan != NULL ;
        !           458:                             scan = scan->m_next) {
        !           459: 
        !           460:                                if (strcmp (scan->m_specs [TEST_FILE],
        !           461:                                            temp.m_specs [TEST_FILE]) == 0)
        !           462:                                        continue;
        !           463:                        }
        !           464: 
        !           465:                        if ((scan = (make_t *)
        !           466:                                        build_malloc (heap,
        !           467:                                                      sizeof (temp))) == NULL)
        !           468:                                throw_error ("Out of memory in make_make ()");
        !           469: 
        !           470:                        * scan = temp;
        !           471:                        scan->m_next = makelist;
        !           472:                        makelist = scan;
        !           473:                }
        !           474:        }
        !           475: 
        !           476:        return makelist;
        !           477: }
        !           478: 
        !           479: 
        !           480: /*
        !           481:  * Iterate over all the mdevice entries and run over either the 'config' or
        !           482:  * 'stub' make-file specifications.
        !           483:  */
        !           484: 
        !           485: #ifdef USE_PROTO
        !           486: LOCAL void (write_makefile) (FILE * out, input_t * example, build_t * heap)
        !           487: #else
        !           488: LOCAL void
        !           489: write_makefile ARGS ((out, example, heap))
        !           490: FILE         * out;
        !           491: input_t              * example;
        !           492: build_t              * heap;
        !           493: #endif
        !           494: {
        !           495:        mdev_t        * mdevp;
        !           496:        make_t        * spec = NULL;
        !           497:        int             ch;
        !           498: 
        !           499:        for (mdevp = mdevices () ; mdevp != NULL ; mdevp = mdevp->md_next) {
        !           500:                int             config = mdevp->md_configure == MD_ENABLED;
        !           501: 
        !           502:                spec = make_make (heap, mdevp->md_prefix->s_data,
        !           503:                                  config ? config_commands : stub_commands,
        !           504:                                  config ? ARRAY_LENGTH (config_commands) :
        !           505:                                           ARRAY_LENGTH (stub_commands),
        !           506:                                  spec);
        !           507:        }
        !           508: 
        !           509: 
        !           510:        /*
        !           511:         * Actually generate the output from a template file, expanding '%'-
        !           512:         * commands in the template into lists of strings as generated above.
        !           513:         */
        !           514: 
        !           515:        while ((ch = read_char (example)) != READ_EOF) {
        !           516:                make_t        * scan;
        !           517: 
        !           518:                switch (ch) {
        !           519: 
        !           520:                case '%':
        !           521:                        switch (ch = read_char (example)) {
        !           522: 
        !           523:                        case '%':
        !           524:                                fputc (ch, out);
        !           525:                                break;
        !           526: 
        !           527:                        case 'T':
        !           528:                                ch = TEST_FILE;
        !           529:                                goto write_list;
        !           530: 
        !           531:                        case 'L':
        !           532:                                ch = LINK_ENTRY;
        !           533:                                goto write_list;
        !           534: 
        !           535:                        case 'C':
        !           536:                                ch = COMPILE_RULES;
        !           537:                                goto write_list;
        !           538: 
        !           539:                        case 'R':
        !           540: 
        !           541:                                ch = CLEAN_ENTRY;
        !           542: write_list:
        !           543:                                for (scan = spec ; scan != NULL ;
        !           544:                                     scan = scan->m_next) {
        !           545: 
        !           546:                                        if (scan->m_specs [ch] == NULL)
        !           547:                                                continue;
        !           548: 
        !           549:                                        fputs (scan->m_specs [ch], out);
        !           550:                                }
        !           551: 
        !           552:                                break;
        !           553: 
        !           554:                        default:
        !           555:                                read_error (example);
        !           556:                                throw_error ("Bad %%-entry in template file");
        !           557:                        }
        !           558:                        break;
        !           559: 
        !           560:                default:
        !           561:                        fputc (ch, out);
        !           562:                        break;
        !           563:                }
        !           564:        }
        !           565: }
        !           566: 
        !           567: 
        !           568: /*
        !           569:  * Write out a detailed set of compile/link commands which will set up a new
        !           570:  * kernel. It searches the appropriate directories where driver object files
        !           571:  * are expected to be installed and determines what files should be linked
        !           572:  * based on the presence of files with appropriate names.
        !           573:  */
        !           574: 
        !           575: #ifdef USE_PROTO
        !           576: int (write_link) (CONST char * outname, CONST char * inname)
        !           577: #else
        !           578: int
        !           579: write_link ARGS ((outname, inname))
        !           580: CONST char    *        outname;
        !           581: CONST char    *        inname;
        !           582: #endif
        !           583: {
        !           584:        time_t          gentime;
        !           585:        char            timebuf [70];
        !           586:        FILE          * out;
        !           587:        input_t       * example;
        !           588:        ehand_t         err;
        !           589:        build_t       * heap;
        !           590: 
        !           591:        if ((heap = builder_alloc (256, 1)) == NULL)
        !           592:                throw_error ("Unable to allocate temporary heap in write_link ()");
        !           593: 
        !           594:        if (inname == NULL)
        !           595:                example = make_file_input (stdin, "template", '#');
        !           596:        else if ((out = fopen (inname, "r")) == NULL)
        !           597:                throw_error ("Unable to open template file in write_link ()");
        !           598:        else
        !           599:                example = make_file_input (out, inname, '#');
        !           600: 
        !           601:        if (example == NULL)
        !           602:                throw_error ("Out of memory in write_link ()");
        !           603: 
        !           604:        if (outname == NULL)
        !           605:                out = stdout;
        !           606:        else if ((out = fopen (outname, "w")) == NULL)
        !           607:                throw_error ("Unable to open output file for writing in write_link ()");
        !           608: 
        !           609:        if (PUSH_HANDLER (err) == 0) {
        !           610:                time (& gentime);
        !           611: 
        !           612:                fprintf (out, "# Kernel makefile\n");
        !           613:                fprintf (out, "# This makefile was automatically generated."
        !           614:                              " Do not hand-modify\n");
        !           615: 
        !           616: #ifdef __COHERENT__
        !           617:                strncpy (timebuf, asctime (localtime (& gentime)),
        !           618:                         sizeof (timebuf) - 1);
        !           619:                timebuf [sizeof (timebuf) - 1] = 0;
        !           620: #else
        !           621:                strftime (timebuf, sizeof (timebuf) - 1, "%x %X %Z",
        !           622:                          localtime (& gentime));
        !           623: #endif
        !           624: 
        !           625:                fprintf (out, "# Generated at %s\n", timebuf);
        !           626: 
        !           627:                write_makefile (out, example, heap);
        !           628: 
        !           629:                if (out != stdout)
        !           630:                        fclose (out);
        !           631: 
        !           632:                if (inname != NULL)
        !           633:                        read_close (example);
        !           634: 
        !           635:                builder_free (heap);
        !           636: 
        !           637:        } else {
        !           638:                if (out != stdout)
        !           639:                        fclose (out);
        !           640: 
        !           641:                if (inname != NULL)
        !           642:                        read_close (example);
        !           643: 
        !           644:                builder_free (heap);
        !           645: 
        !           646:                CHAIN_ERROR (err);
        !           647:        }
        !           648: 
        !           649:        POP_HANDLER (err);
        !           650:        return 0;
        !           651: }

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