1/*
2  Copyright (c) 1990-2002 Info-ZIP.  All rights reserved.
3
4  See the accompanying file LICENSE, version 2000-Apr-09 or later
5  (the contents of which are also included in zip.h) for terms of use.
6  If, for some reason, all these files are missing, the Info-ZIP license
7  also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
8*/
9/* Low-level Amiga routines shared between Zip and UnZip.
10 *
11 * Contains:  FileDate()
12 *            getenv()          [replaces inadequate standard library version]
13 *            setenv()          [SAS/C only, replaces standard library version]
14 *            set_TZ()          [SAS/C only]
15 *            GetPlatformLocalTimezone() [callback from timezone.c tzset()]
16 *            time()
17 *            sendpkt()
18 *            Agetch()
19 *
20 * The first five are used by most Info-ZIP programs except fUnZip.
21 * The last two are used by all except the non-CRYPT version of fUnZip.
22 * Probably some of the stuff in here is unused by ZipNote and ZipSplit too...
23 * sendpkt() is used by Agetch() and FileDate(), and by screensize() in
24 * amiga/amiga.c (UnZip); time() is used only by Zip.
25 */
26
27
28/* HISTORY/CHANGES
29 *  2 Sep 92, Greg Roelofs, Original coding.
30 *  6 Sep 92, John Bush, Incorporated into UnZip 5.1
31 *  6 Sep 92, John Bush, Interlude "FileDate()" defined, which calls or
32 *            redefines SetFileDate() depending upon AMIGADOS2 definition.
33 * 11 Oct 92, John Bush, Eliminated AMIGADOS2 switch by determining
34 *            revision via OpenLibrary() call.  Now only one version of
35 *            the program runs on both platforms (1.3.x vs. 2.x)
36 * 11 Oct 92, John Bush, Merged with Zip version and changed arg passing
37 *            to take time_t input instead of struct DateStamp.
38 *            Arg passing made to conform with utime().
39 * 22 Nov 92, Paul Kienitz, fixed includes for Aztec and cleaned up some
40 *            lint-ish errors; simplified test for AmigaDOS version.
41 * 11 Nov 95, Paul Kienitz, added Agetch() for crypt password input and
42 *            UnZip's "More" prompt -- simplifies crypt.h and avoids
43 *            use of library code redundant with sendpkt().  Made it
44 *            available to fUnZip, which does not use FileDate().
45 * 22 Nov 95, Paul Kienitz, created a new tzset() that gets the current
46 *            timezone from the Locale preferences.  These exist only under
47 *            AmigaDOS 2.1 and up, but it is probably correctly set on more
48 *            Amigas than the TZ environment variable is.  We check that
49 *            only if TZ is not validly set.  We do not parse daylight
50 *            savings syntax except to check for presence vs. absence of a
51 *            DST part; United States rules are assumed.  This is better
52 *            than the tzset()s in the Amiga compilers' libraries do.
53 * 15 Jan 96, Chr. Spieler, corrected the logic when to select low level
54 *            sendpkt() (when FileDate(), Agetch() or windowheight() is used),
55 *            and AMIGA's Agetch() (CRYPT, and UnZip(SFX)'s UzpMorePause()).
56 * 10 Feb 96, Paul Kienitz, re-fiddled that selection logic again, moved
57 *            stuff around for clarity.
58 * 16 Mar 96, Paul Kienitz, created a replacement localtime() to go with the
59 *            new tzset(), because Aztec's is hopelessly broken.  Also
60 *            gmtime(), which localtime() calls.
61 * 12 Apr 96, Paul Kienitz, daylight savings was being handled incorrectly.
62 * 21 Apr 96, Paul Kienitz, had to replace time() as well, Aztec's returns
63 *            local time instead of GMT.  That's why their localtime() was bad,
64 *            because it assumed time_t was already local, and gmtime() was
65 *            the one that checked TZ.
66 * 23 Apr 96, Chr. Spieler, deactivated time() replacement for UnZip stuff.
67 *            Currently, the UnZip sources do not make use of time() (and do
68 *            not supply the working mktime() replacement, either!).
69 * 29 Apr 96, Paul Kienitz, created a replacement getenv() out of code that
70 *            was previously embedded in tzset(), for reliable global test
71 *            of whether TZ is set or not.
72 * 19 Jun 96, Haidinger Walter, re-adapted for current SAS/C compiler.
73 *  7 Jul 96, Paul Kienitz, smoothed together compiler-related changes.
74 *  4 Feb 97, Haidinger Walter, added set_TZ() for SAS/C.
75 * 23 Apr 97, Paul Kienitz, corrected Unix->Amiga DST error by adding
76 *            mkgmtime() so localtime() could be used.
77 * 28 Apr 97, Christian Spieler, deactivated mkgmtime() definition for ZIP;
78 *            the Zip sources supply this function as part of util.c.
79 * 24 May 97, Haidinger Walter, added time_lib support for SAS/C and moved
80 *            set_TZ() to time_lib.c.
81 * 12 Jul 97, Paul Kienitz, adapted time_lib stuff for Aztec.
82 * 26 Jul 97, Chr. Spieler, old mkgmtime() fixed (ydays[] def, sign vs unsign).
83 * 30 Dec 97, Haidinger Walter, adaptation for SAS/C using z-stat.h functions.
84 * 19 Feb 98, Haidinger Walter, removed alloc_remember, more SAS.C fixes.
85 * 23 Apr 98, Chr. Spieler, removed mkgmtime(), changed FileDate to convert to
86 *            Amiga file-time directly.
87 * 24 Apr 98, Paul Kienitz, clip Unix dates earlier than 1978 in FileDate().
88 * 02 Sep 98, Paul Kienitz, C. Spieler, always include zip.h to get a defined
89 *            header inclusion sequence that resolves all header dependencies.
90 * 06 Jun 00, Paul Kienitz, removed time_lib.c due to its incompatible license,
91 *            moved set_TZ() back here, replaced minimal tzset() and localtime()
92 *            with new versions derived from GNU glibc source.  Gave locale_TZ()
93 *            reasonable European defaults for daylight savings.
94 * 17 Jun 00, Paul Kienitz, threw out GNU code because of objections to the GPL
95 *            virus, replaced with similar functions based on the public domain
96 *            timezone code at ftp://elsie.nci.nih.gov/pub.  As with the GNU
97 *            stuff, support for timezone files and leap seconds was removed.
98 * 23 Aug 00, Paul Kienitz, moved timezone code out from here into separate
99 *            platform-independent module 'timezone.c'.
100 * 31 Dec 00, Christian Spieler, moved system-specific timezone help funcions
101 *            back in here, from 'timezone.c'.
102 * 07 Jan 01, Paul Kienitz, Chr. Spieler, added missing #include "timezone.h"
103 *            and "symbolic" preprocessor constants for time calculations.
104 * 15 Jan 02, Paul Kienitz, excluded all time handling code from compilation
105 *            for Zip utilities (when "defined(UTIL)")
106 */
107
108#ifndef __amiga_filedate_c
109#define __amiga_filedate_c
110
111
112#include "zip.h"
113#include <ctype.h>
114#include <errno.h>
115
116#include <exec/types.h>
117#include <exec/execbase.h>
118#include <exec/memory.h>
119#include <dos/dosextens.h>
120
121#ifdef AZTEC_C
122#  include <libraries/dos.h>
123#  include <libraries/dosextens.h>
124#  include <clib/exec_protos.h>
125#  include <clib/dos_protos.h>
126#  include <clib/locale_protos.h>
127#  include <pragmas/exec_lib.h>
128#  include <pragmas/dos_lib.h>
129#  include <pragmas/locale_lib.h>
130#  define ESRCH  ENOENT
131#  define EOSERR EIO
132#endif
133
134#ifdef __SASC
135#  include <stdlib.h>
136#  if (defined(_M68020) && (!defined(__USE_SYSBASE)))
137                            /* on 68020 or higher processors it is faster   */
138#    define __USE_SYSBASE   /* to use the pragma libcall instead of syscall */
139#  endif                    /* to access functions of the exec.library      */
140#  include <proto/exec.h>   /* see SAS/C manual:part 2,chapter 2,pages 6-7  */
141#  include <proto/dos.h>
142#  include <proto/locale.h>
143#  ifdef DEBUG
144#     include <sprof.h>
145#  endif
146#  ifdef MWDEBUG
147#    include <stdio.h>      /* include both before memwatch.h again just */
148#    include <stdlib.h>     /* to be safe */
149#    include "memwatch.h"
150#  endif /* MWDEBUG */
151#endif /* __SASC */
152
153#include "crypt.h"            /* just so we can tell if CRYPT is supported */
154
155
156#if (!defined(FUNZIP) && !defined(UTIL))
157
158#include "timezone.h"         /* for AMIGA-specific timezone callbacks */
159
160#ifndef SUCCESS
161#  define SUCCESS (-1L)
162#  define FAILURE 0L
163#endif
164
165#define ReqVers 36L        /* required library version for SetFileDate() */
166#define ENVSIZE 100        /* max space allowed for an environment var   */
167
168extern struct ExecBase *SysBase;
169
170#ifndef min
171#  define min(a, b)  ((a) < (b) ? (a) : (b))
172#  define max(a, b)  ((a) < (b) ? (b) : (a))
173#endif
174
175#if defined(ZIP) || defined(HAVE_MKTIME)
176static const unsigned short ydays[] =
177    { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
178#else
179extern const unsigned short ydays[];  /* in unzip's fileio.c */
180#endif
181
182#define LEAP(y)     (((y) % 4 == 0 && (y) % 100 != 0) || (y) % 400 == 0)
183#define YDAYS(m, y) (ydays[m] + (m > 1 && LEAP(y)))
184/* Number of leap years from 1978 to `y' (not including `y' itself). */
185#define ANLEAP(y)   (((y) - 1977) / 4 - ((y) - 1901) / 100 + ((y) - 1601) / 400)
186#define SECSPERMIN  60
187#define MINSPERHOUR 60
188#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
189#define SECSPERDAY  86400L
190
191/* prototypes */
192char *getenv(const char *var);
193#ifdef __SASC
194/*  XXX !!  We have really got to find a way to operate without these. */
195int setenv(const char *var, const char *value, int overwrite);
196void set_TZ(long time_zone, int day_light);
197#endif
198
199LONG FileDate(char *filename, time_t u[]);
200LONG sendpkt(struct MsgPort *pid, LONG action, LONG *args, LONG nargs);
201int Agetch(void);
202
203/* =============================================================== */
204
205/***********************/
206/* Function filedate() */
207/***********************/
208
209/*  FileDate() (originally utime.c), by Paul Wells.  Modified by John Bush
210 *  and others (see also sendpkt() comments, below); NewtWare SetFileDate()
211 *  clone cheaply ripped off from utime().
212 */
213
214/* DESCRIPTION
215 * This routine chooses between 2 methods to set the file date on AMIGA.
216 * Since AmigaDOS 2.x came out, SetFileDate() was available in ROM (v.36
217 * and higher).  Under AmigaDOS 1.3.x (less than v.36 ROM), SetFileDate()
218 * must be accomplished by constructing a message packet and sending it
219 * to the file system handler of the file to be stamped.
220 *
221 * The system's ROM version is extracted from the external system Library
222 * base.
223 *
224 * NOTE:  although argument passing conforms with utime(), note the
225 *        following differences:
226 *          - Return value is boolean success/failure.
227 *          - If a structure or array is passed, only the first value
228 *            is used, which *may* correspond to date accessed and not
229 *            date modified.
230 */
231
232LONG FileDate(filename, u)
233    char *filename;
234    time_t u[];
235{
236    LONG SetFileDate(UBYTE *filename, struct DateStamp *pDate);
237    LONG sendpkt(struct MsgPort *pid, LONG action, LONG *args, LONG nargs);
238    struct MsgPort *taskport;
239    BPTR dirlock, lock;
240    struct FileInfoBlock *fib;
241    LONG pktargs[4];
242    UBYTE *ptr;
243    long ret;
244
245    struct DateStamp pDate;
246    struct tm *ltm;
247    int years;
248
249    tzset();
250    /* Amiga file date is based on 01-Jan-1978 00:00:00 (local time):
251     * 8 years and 2 leapdays difference from Unix time.
252     */
253    ltm = localtime(&u[0]);
254    years = ltm->tm_year + 1900;
255    if (years < 1978)
256        pDate.ds_Days = pDate.ds_Minute = pDate.ds_Tick = 0;
257    else {
258        pDate.ds_Days = (years - 1978) * 365L + (ANLEAP(years)) +
259                        YDAYS(ltm->tm_mon, years) + (ltm->tm_mday - 1);
260        pDate.ds_Minute = ltm->tm_hour * 60 + ltm->tm_min;
261        pDate.ds_Tick = ltm->tm_sec * TICKS_PER_SECOND;
262    }
263
264    if (SysBase->LibNode.lib_Version >= ReqVers)
265    {
266        return (SetFileDate(filename,&pDate));  /* native routine at 2.0+ */
267    }
268    else  /* !(SysBase->lib_Version >=ReqVers) */
269    {
270        if( !(taskport = (struct MsgPort *)DeviceProc(filename)) )
271        {
272            errno = ESRCH;          /* no such process */
273            return FAILURE;
274        }
275
276        if( !(lock = Lock(filename,SHARED_LOCK)) )
277        {
278            errno = ENOENT;         /* no such file */
279            return FAILURE;
280        }
281
282        if( !(fib = (struct FileInfoBlock *)AllocMem(
283            (long)sizeof(struct FileInfoBlock),MEMF_PUBLIC|MEMF_CLEAR)) )
284        {
285            errno = ENOMEM;         /* insufficient memory */
286            UnLock(lock);
287            return FAILURE;
288        }
289
290        if( Examine(lock,fib)==FAILURE )
291        {
292            errno = EOSERR;         /* operating system error */
293            UnLock(lock);
294            FreeMem(fib,(long)sizeof(*fib));
295            return FAILURE;
296        }
297
298        dirlock = ParentDir(lock);
299        ptr = (UBYTE *)AllocMem(64L,MEMF_PUBLIC);
300        strcpy((ptr+1),fib->fib_FileName);
301        *ptr = strlen(fib->fib_FileName);
302        FreeMem(fib,(long)sizeof(*fib));
303        UnLock(lock);
304
305        /* now fill in argument array */
306
307        pktargs[0] = 0;
308        pktargs[1] = (LONG)dirlock;
309        pktargs[2] = (LONG)&ptr[0] >> 2;
310        pktargs[3] = (LONG)&pDate;
311
312        errno = ret = sendpkt(taskport,ACTION_SET_DATE,pktargs,4L);
313
314        FreeMem(ptr,64L);
315        UnLock(dirlock);
316
317        return SUCCESS;
318    }  /* ?(SysBase->lib_Version >= ReqVers) */
319} /* FileDate() */
320
321
322char *getenv(const char *var)         /* not reentrant! */
323{
324    static char space[ENVSIZE];
325    struct Process *me = (void *) FindTask(NULL);
326    void *old_window = me->pr_WindowPtr;
327    char *ret = NULL;
328
329    me->pr_WindowPtr = (void *) -1;   /* suppress any "Please insert" popups */
330    if (SysBase->LibNode.lib_Version >= ReqVers) {
331        if (GetVar((char *) var, space, ENVSIZE - 1, /*GVF_GLOBAL_ONLY*/ 0) > 0)
332            ret = space;
333    } else {                    /* early AmigaDOS, get env var the crude way */
334        BPTR hand, foot, spine;
335        int z = 0;
336        if (foot = Lock("ENV:", ACCESS_READ)) {
337            spine = CurrentDir(foot);
338            if (hand = Open((char *) var, MODE_OLDFILE)) {
339                z = Read(hand, space, ENVSIZE - 1);
340                Close(hand);
341            }
342            UnLock(CurrentDir(spine));
343        }
344        if (z > 0) {
345            space[z] = '\0';
346            ret = space;
347        }
348    }
349    me->pr_WindowPtr = old_window;
350    return ret;
351}
352
353#ifdef __SASC
354int setenv(const char *var, const char *value, int overwrite)
355{
356    struct Process *me = (void *) FindTask(NULL);
357    void *old_window = me->pr_WindowPtr;
358    int ret = -1;
359
360    me->pr_WindowPtr = (void *) -1;   /* suppress any "Please insert" popups */
361    if (SysBase->LibNode.lib_Version >= ReqVers)
362        ret = !SetVar((char *)var, (char *)value, -1, GVF_GLOBAL_ONLY | LV_VAR);
363    else {
364        BPTR hand, foot, spine;
365        long len = value ? strlen(value) : 0;
366        if (foot = Lock("ENV:", ACCESS_READ)) {
367            spine = CurrentDir(foot);
368            if (len) {
369                if (hand = Open((char *) var, MODE_NEWFILE)) {
370                    ret = Write(hand, (char *) value, len + 1) >= len;
371                    Close(hand);
372                }
373            } else
374                ret = DeleteFile((char *) var);
375            UnLock(CurrentDir(spine));
376        }
377    }
378    me->pr_WindowPtr = old_window;
379    return ret;
380}
381
382/* Stores data from timezone and daylight to ENV:TZ.                  */
383/* ENV:TZ is required to exist by some other SAS/C library functions, */
384/* like stat() or fstat().                                            */
385void set_TZ(long time_zone, int day_light)
386{
387    char put_tz[MAXTIMEZONELEN];  /* string for putenv: "TZ=aaabbb:bb:bbccc" */
388    int offset;
389    void *exists;     /* dummy ptr to see if global envvar TZ already exists */
390    exists = (void *)getenv(TZ_ENVVAR);
391    /* see if there is already an envvar TZ_ENVVAR. If not, create it */
392    if (exists == NULL) {
393        /* create TZ string by pieces: */
394        sprintf(put_tz, "GMT%+ld", time_zone / 3600L);
395        if (time_zone % 3600L) {
396            offset = (int) labs(time_zone % 3600L);
397            sprintf(put_tz + strlen(put_tz), ":%02d", offset / 60);
398            if (offset % 60)
399                sprintf(put_tz + strlen(put_tz), ":%02d", offset % 60);
400        }
401        if (day_light)
402            strcat(put_tz,"DST");
403        setenv(TZ_ENVVAR, put_tz, 1);
404    }
405}
406#endif /* __SASC */
407
408/* set state as well as possible from settings found in locale.library */
409int GetPlatformLocalTimezone(sp, fill_tzstate_from_rules)
410     register struct state * ZCONST sp;
411     void (*fill_tzstate_from_rules)(struct state * ZCONST sp_res,
412                                     ZCONST struct rule * ZCONST start,
413                                     ZCONST struct rule * ZCONST end);
414{
415    struct Library *LocaleBase;
416    struct Locale *ll;
417    struct Process *me = (void *) FindTask(NULL);
418    void *old_window = me->pr_WindowPtr;
419    BPTR eh;
420    int z, valid = FALSE;
421
422    /* read timezone from locale.library if TZ envvar missing */
423    me->pr_WindowPtr = (void *) -1;   /* suppress any "Please insert" popups */
424    if (LocaleBase = OpenLibrary("locale.library", 0)) {
425        if (ll = OpenLocale(NULL)) {
426            z = ll->loc_GMTOffset;    /* in minutes */
427            if (z == -300) {
428                if (eh = Lock("ENV:sys/locale.prefs", ACCESS_READ)) {
429                    UnLock(eh);
430                    valid = TRUE;
431                } else
432                    z = 300; /* bug: locale not initialized, default bogus! */
433            } else
434                valid = TRUE;
435            if (valid) {
436                struct rule startrule, stoprule;
437
438                sp->timecnt = 0;
439                sp->typecnt = 1;
440                sp->charcnt = 2;
441                sp->chars[0] = sp->chars[1] = '\0';
442                sp->ttis[0].tt_abbrind = 0;
443                sp->ttis[1].tt_abbrind = 1;
444                sp->ttis[0].tt_gmtoff = -z * MINSPERHOUR;
445                sp->ttis[1].tt_gmtoff = -z * MINSPERHOUR + SECSPERHOUR;
446                sp->ttis[0].tt_isdst = 0;
447                sp->ttis[1].tt_isdst = 1;
448                stoprule.r_type = MONTH_NTH_DAY_OF_WEEK;
449                stoprule.r_day = 0;
450                stoprule.r_week = 5;
451                stoprule.r_mon = 10;
452                stoprule.r_time = 2 * SECSPERHOUR;
453                startrule = stoprule;
454                startrule.r_mon = 4;
455                startrule.r_week = 1;
456                if (z >= -180 && z < 150) {
457                    /* At this point we make a really gratuitous assumption: */
458                    /* if the time zone could be Europe, we use the European */
459                    /* Union rules without checking what country we're in.   */
460                    /* The AmigaDOS locale country codes do not, at least in */
461                    /* 2.x versions of the OS, recognize very many countries */
462                    /* outside of Europe and North America.                  */
463                    sp->typecnt = 2;
464                    startrule.r_mon = 3;   /* one week earlier than US DST */
465                    startrule.r_week = 5;
466                } else if (z >= 150 && z <= 480 &&
467                           /* no DST in alaska, hawaii */
468                           (ll->loc_CountryCode == 0x55534100 /*"USA"*/ ||
469                            ll->loc_CountryCode == 0x43414E00 /*"CAN"*/))
470                    sp->typecnt = 2;
471                    /* We check the country code for U.S. or Canada because */
472                    /* most of Latin America has no DST.  Even in these two */
473                    /* countries there are some exceptions...               */
474                /* else if...  Feel free to add more cases here! */
475
476                if (sp->typecnt > 1)
477                    (*fill_tzstate_from_rules)(sp, &startrule, &stoprule);
478            }
479            CloseLocale(ll);
480        }
481        CloseLibrary(LocaleBase);
482    }
483    me->pr_WindowPtr = old_window;
484    return valid;
485}
486
487#ifdef ZIP
488time_t time(time_t *tp)
489{
490    time_t t;
491    struct DateStamp ds;
492    DateStamp(&ds);
493    t = ds.ds_Tick / TICKS_PER_SECOND + ds.ds_Minute * 60
494                                      + (ds.ds_Days + 2922) * SECSPERDAY;
495    t = mktime(gmtime(&t));
496    /* gmtime leaves ds in the local timezone, mktime converts it to GMT */
497    if (tp) *tp = t;
498    return t;
499}
500#endif /* ZIP */
501
502#endif /* !FUNZIP && !UTIL */
503
504
505#if CRYPT || !defined(FUNZIP)
506
507/*  sendpkt.c
508 *  by A. Finkel, P. Lindsay, C. Sheppner
509 *  returns Res1 of the reply packet
510 */
511/*
512#include <exec/types.h>
513#include <exec/memory.h>
514#include <libraries/dos.h>
515#include <libraries/dosextens.h>
516#include <proto/exec.h>
517#include <proto/dos.h>
518*/
519
520LONG sendpkt(struct MsgPort *pid, LONG action, LONG *args, LONG nargs);
521
522LONG sendpkt(pid,action,args,nargs)
523struct MsgPort *pid;           /* process identifier (handler message port) */
524LONG action,                   /* packet type (desired action)              */
525     *args,                    /* a pointer to argument list                */
526     nargs;                    /* number of arguments in list               */
527{
528
529    struct MsgPort *replyport, *CreatePort(UBYTE *, long);
530    void DeletePort(struct MsgPort *);
531    struct StandardPacket *packet;
532    LONG count, *pargs, res1;
533
534    replyport = CreatePort(NULL,0L);
535    if( !replyport ) return(0);
536
537    packet = (struct StandardPacket *)AllocMem(
538            (long)sizeof(struct StandardPacket),MEMF_PUBLIC|MEMF_CLEAR);
539    if( !packet )
540    {
541        DeletePort(replyport);
542        return(0);
543    }
544
545    packet->sp_Msg.mn_Node.ln_Name  = (char *)&(packet->sp_Pkt);
546    packet->sp_Pkt.dp_Link          = &(packet->sp_Msg);
547    packet->sp_Pkt.dp_Port          = replyport;
548    packet->sp_Pkt.dp_Type          = action;
549
550    /* copy the args into the packet */
551    pargs = &(packet->sp_Pkt.dp_Arg1);      /* address of 1st argument */
552    for( count=0; count<nargs; count++ )
553        pargs[count] = args[count];
554
555    PutMsg(pid,(struct Message *)packet);   /* send packet */
556
557    WaitPort(replyport);
558    GetMsg(replyport);
559
560    res1 = packet->sp_Pkt.dp_Res1;
561
562    FreeMem((char *)packet,(long)sizeof(*packet));
563    DeletePort(replyport);
564
565    return(res1);
566
567} /* sendpkt() */
568
569#endif /* CRYPT || !FUNZIP */
570
571
572#if CRYPT || (defined(UNZIP) && !defined(FUNZIP))
573
574/* Agetch() reads one raw keystroke -- uses sendpkt() */
575
576int Agetch(void)
577{
578    LONG sendpkt(struct MsgPort *pid, LONG action, LONG *args, LONG nargs);
579    struct Task *me = FindTask(NULL);
580    struct CommandLineInterface *cli = BADDR(((struct Process *) me)->pr_CLI);
581    BPTR fh = cli->cli_StandardInput;   /* this is immune to < redirection */
582    void *conp = ((struct FileHandle *) BADDR(fh))->fh_Type;
583    char longspace[8];
584    long *flag = (long *) ((ULONG) &longspace[4] & ~3); /* LONGWORD ALIGNED! */
585    UBYTE c;
586
587    *flag = 1;
588    sendpkt(conp, ACTION_SCREEN_MODE, flag, 1);         /* assume success */
589    Read(fh, &c, 1);
590    *flag = 0;
591    sendpkt(conp, ACTION_SCREEN_MODE, flag, 1);
592    if (c == 3)                                         /* ^C in input */
593        Signal(me, SIGBREAKF_CTRL_C);
594    return c;
595}
596
597#endif /* CRYPT || (UNZIP && !FUNZIP) */
598
599#endif /* __amiga_filedate_c*/
600