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- /*---------------------------------------------------------------------------
-
- file_io.c
-
- This file contains routines for doing direct input/output, file-related
- sorts of things. Most of the system-specific code for unzip is contained
- here, including the non-echoing password code for decryption (bottom).
-
- ---------------------------------------------------------------------------*/
-
-
- #define const
- #include "unzip.h"
-
-
- /************************************/
- /* File_IO Local Prototypes, etc. */
- /************************************/
-
- #ifndef DOS_OS2
- static int dos2unix __((unsigned char *buf, int len));
- int CR_flag = 0; /* when last char of buffer == CR (for dos2unix()) */
- #endif
-
- #ifdef OS2
- extern int longname; /* set in mapname.c */
- extern char longfilename[];
- #endif
-
- #ifdef CRYPT
- typedef char voidp;
- # if defined(DOS_OS2) || defined(VMS)
- # define MSVMS
- # ifdef DOS_OS2
- # include <conio.h>
- # else /* !DOS_OS2 */
- # define getch() getc(stderr)
- # define OFF 0 /* for echo control */
- # define ON 1
- # include <descrip.h>
- # include <iodef.h>
- # include <ttdef.h>
- # ifndef SS$_NORMAL
- # define SS$_NORMAL 1 /* only thing we need from <ssdef.h> */
- # endif
- # endif /* ?DOS_OS2 */
- # else /* !(DOS_OS2 || VMS) */
- # ifdef TERMIO /* Amdahl, Cray, all SysV? */
- # ifdef CONVEX
- # include <sys/termios.h>
- # include <sgtty.h>
- # else /* !CONVEX */
- # include <sys/termio.h>
- # define sgttyb termio
- # define sg_flags c_lflag
- # endif /* ?CONVEX */
- int ioctl OF((int, int, voidp *));
- # define GTTY(f,s) ioctl(f,TCGETA,(voidp *)s)
- # define STTY(f,s) ioctl(f,TCSETAW,(voidp *)s)
- # else /* !TERMIO */
- # ifndef MINIX
- # include <sys/ioctl.h>
- # endif /* !MINIX */
- # include <sgtty.h>
- int gtty OF((int, struct sgttyb *));
- int stty OF((int, struct sgttyb *));
- # define GTTY gtty
- # define STTY stty
- # endif /* ?TERMIO */
- int isatty OF((int));
- char *ttyname OF((int));
- int open OF((char *, int, ...));
- int close OF((int));
- int read OF((int, voidp *, int));
- # endif /* ?(DOS_OS2 || VMS) */
- #endif /* CRYPT */
-
-
-
-
-
- /******************************/
- /* Function open_input_file() */
- /******************************/
-
- int open_input_file()
- { /* return non-0 if open failed */
- /*
- * open the zipfile for reading and in BINARY mode to prevent cr/lf
- * translation, which would corrupt the bitstreams
- */
-
- #ifdef UNIX
- zipfd = open(zipfn, O_RDONLY);
- #else
- zipfd = open(zipfn, O_RDONLY | O_BINARY);
- #endif
- if (zipfd < 1) {
- fprintf(stderr, "error: can't open zipfile [ %s ]\n", zipfn);
- return (1);
- }
- return 0;
- }
-
-
-
-
-
- /**********************/
- /* Function readbuf() */
- /**********************/
-
- int readbuf(buf, size)
- char *buf;
- register unsigned size;
- { /* return number of bytes read into buf */
- register int count;
- int n;
-
- n = size;
- while (size) {
- if (incnt == 0) {
- if ((incnt = read(zipfd, (char *)inbuf, INBUFSIZ)) <= 0)
- return (n-size);
- /* buffer ALWAYS starts on a block boundary: */
- cur_zipfile_bufstart += INBUFSIZ;
- inptr = inbuf;
- }
- count = min(size, incnt);
- memcpy(buf, inptr, count);
- buf += count;
- inptr += count;
- incnt -= count;
- size -= count;
- }
- return (n);
- }
-
-
-
-
-
- #ifndef VMS /* for VMS use code in vms.c (old VMS code below is retained
- * in case of problems...will be removed in a later release) */
-
- /*********************************/
- /* Function create_output_file() */
- /*********************************/
-
- int create_output_file()
- { /* return non-0 if creat failed */
-
-
- /*---------------------------------------------------------------------------
- Create the output file with appropriate permissions. If we've gotten to
- this point and the file still exists, we have permission to blow it away.
- ---------------------------------------------------------------------------*/
-
- #ifndef DOS_OS2
- CR_flag = 0; /* hack to get CR at end of buffer working */
- #endif
-
- #if defined(UNIX) && !defined(AMIGA)
- {
- int mask;
-
- #ifndef VMS
- if (!stat(filename, &statbuf) && (unlink(filename) < 0)) {
- fprintf(stderr, "\n%s: cannot delete old copy\n", filename);
- return 1;
- }
- # define EXTRA_ARGS
- #else /* VMS */
- # define EXTRA_ARGS ,"rfm=stmlf","rat=cr"
- #endif /* ?VMS */
-
- mask = umask(0); /* now know we own it */
- outfd = creat(filename, 0777 & pInfo->unix_attr EXTRA_ARGS);
- umask(mask); /* VMS, Unix */
- }
- #else /* !UNIX || AMIGA */ /* file permissions set after file closed */
- #if defined(MACOS) && defined(MPW) && !defined(MCH_MACINTOSH)
- outfd = creat(filename); /* Mac MPW C compiler */
- #else /* !(Macintosh MPW 3.2 C) */
- outfd = creat(filename, S_IWRITE | S_IREAD); /* DOS, OS2, Mac, Amiga */
- #endif /* ?(Macintosh MPW 3.2 C) */
- #endif /* ?(UNIX && !AMIGA) */
-
- if (outfd < 1) {
- fprintf(stderr, "\n%s: cannot create\n", filename);
- return 1;
- }
-
- /*---------------------------------------------------------------------------
- If newly created file is in text mode and should be binary (to disable
- automatic CR/LF translations), either close it and reopen as binary or
- else change the mode to binary (DOS, OS/2). If it is already binary and
- should be text, change the mode to text (Mac).
- ---------------------------------------------------------------------------*/
-
- #ifndef UNIX
- #ifdef THINK_C
- /*
- * THINKC's stdio routines have the horrible habit of
- * making any file you open look like generic files.
- * This code tells the OS that it's a text file.
- */
- if (aflag) {
- fileParam pb;
- OSErr err;
-
- CtoPstr(filename);
- pb.ioNamePtr = (StringPtr)filename;
- pb.ioVRefNum = 0;
- pb.ioFVersNum = 0;
- pb.ioFDirIndex = 0;
- err = PBGetFInfo(&pb,0);
- if (err == noErr) {
- pb.ioFlFndrInfo.fdCreator = '\?\?\?\?';
- pb.ioFlFndrInfo.fdType = 'TEXT';
- err = PBSetFInfo(&pb, 0);
- }
- PtoCstr(filename);
- }
- #endif /* THINK_C */
-
- if (!aflag) {
- #ifdef DOS_OS2
- if (setmode(outfd, O_BINARY) == -1) {
- #else /* !DOS_OS2 */
- close(outfd);
- if ((outfd = open(filename, O_RDWR | O_BINARY)) < 1) {
- #endif /* ?DOS_OS2 */
- fprintf(stderr, "Can't make output file binary: %s\n", filename);
- return 1;
- }
- }
- #endif /* !UNIX */
-
- return 0;
- }
-
- #endif /* !VMS */
-
-
-
-
-
- /****************************/
- /* Function FillBitBuffer() */
- /****************************/
-
- int FillBitBuffer()
- {
- /*
- * Fill bitbuf, which is 32 bits. This function is only used by the
- * READBIT and PEEKBIT macros (which are used by all of the uncompression
- * routines).
- */
- UWORD temp;
-
- zipeof = 1;
- while (bits_left < 25 && ReadByte(&temp) == 8)
- {
- bitbuf |= (ULONG)temp << bits_left;
- bits_left += 8;
- zipeof = 0;
- }
- return 0;
- }
-
-
-
-
-
- /***********************/
- /* Function ReadByte() */
- /***********************/
-
- int ReadByte(x)
- UWORD *x;
- {
- /*
- * read a byte; return 8 if byte available, 0 if not
- */
-
-
- if (csize-- <= 0)
- return 0;
-
- if (incnt == 0) {
- if ((incnt = read(zipfd, (char *)inbuf, INBUFSIZ)) <= 0)
- return 0;
- /* buffer ALWAYS starts on a block boundary: */
- cur_zipfile_bufstart += INBUFSIZ;
- inptr = inbuf;
- #ifdef CRYPT
- if (pInfo->encrypted) {
- byte *p;
- int n, t;
-
- for (n = incnt > csize + 1 ? (int)csize + 1 : incnt, p = inptr;
- n--; p++)
- *p = DECRYPT(*p);
- }
- #endif /* CRYPT */
- }
- *x = *inptr++;
- --incnt;
- return 8;
- }
-
-
-
-
-
- #ifndef VMS /* for VMS use code in vms.c */
-
- /**************************/
- /* Function FlushOutput() */
- /**************************/
-
- int FlushOutput()
- {
- /*
- * flush contents of output buffer; return PK-type error code
- */
- #ifndef DOS_OS2
- # define CTRLZ 26
- int saved_ctrlZ = FALSE;
- #endif /* !DOS_OS2 */
- int len;
-
-
- if (disk_full) {
- outpos += outcnt; /* fake emptied buffer */
- outcnt = 0;
- outptr = outbuf;
- return 50; /* ignore rest of this file */
- }
-
- if (outcnt) {
- UpdateCRC(outbuf, outcnt);
-
- if (!tflag) {
- #ifndef DOS_OS2
- if (aflag) {
- if (outbuf[outcnt-1] == CTRLZ) {
- --outcnt;
- saved_ctrlZ = TRUE;
- }
- len = dos2unix(outbuf, outcnt);
- } else
- #endif /* !DOS_OS2 */
- len = outcnt;
- if (write(outfd, (char *)outout, len) != len)
- #ifdef DOS_OS2
- if (!cflag) /* ^Z treated as EOF, removed with -c */
- #else /* !DOS_OS2 */
- #ifdef MINIX
- if (errno == EFBIG)
- if (write(fd, outout, len/2) != len/2 ||
- write(fd, outout+len/2, len/2) != len/2)
- #endif /* MINIX */
- #endif /* ?DOS_OS2 */
- {
- /* GRR: add test for force_flag when has its own switch */
- fprintf(stderr,
- "\n%s: write error (disk full?). Continue? (y/n/^C) ",
- filename);
- FFLUSH /* for Amiga and Mac MPW */
- fgets(answerbuf, 9, stdin);
- if (*answerbuf == 'y') /* stop writing to this file */
- disk_full = 1; /* (outfd bad?), but new OK */
- else
- disk_full = 2; /* no: exit program */
- return 50; /* 50: disk full */
- }
- }
- outpos += outcnt;
- outcnt = 0;
- outptr = outbuf;
- #ifndef DOS_OS2
- if (saved_ctrlZ) {
- *outptr++ = CTRLZ;
- ++outcnt;
- }
- #endif /* !DOS_OS2 */
- }
- return (0); /* 0: no error */
- }
-
- #endif /* !VMS */
-
-
-
-
-
- #ifndef DOS_OS2 /* GRR: rewrite this for generic text conversions */
-
- /***********************/
- /* Function dos2unix() */
- /***********************/
-
- static int dos2unix(buf, len)
- unsigned char *buf;
- int len;
- {
- int new_len;
- int i;
- unsigned char *walker;
-
- new_len = len;
- walker = outout;
- #ifdef MACOS
- /*
- * Mac wants to strip LFs instead CRs from CRLF pairs
- */
- if (CR_flag && *buf == LF) {
- buf++;
- new_len--;
- len--;
- CR_flag = buf[len] == CR;
- }
- else
- CR_flag = buf[len - 1] == CR;
- for (i = 0; i < len; i += 1) {
- *walker++ = ascii_to_native(*buf);
- if (*buf == LF) walker[-1] = CR;
- if (*buf++ == CR && *buf == LF) {
- new_len--;
- buf++;
- i++;
- }
- }
- #else
- if (CR_flag && *buf != LF)
- *walker++ = ascii_to_native(CR);
- CR_flag = buf[len - 1] == CR;
- for (i = 0; i < len; i += 1) {
- *walker++ = ascii_to_native(*buf);
- if (*buf++ == CR && *buf == LF) {
- new_len--;
- walker[-1] = ascii_to_native(*buf++);
- i++;
- }
- }
- /*
- * If the last character is a CR, then "ignore it" for now...
- */
- if (walker[-1] == ascii_to_native(CR))
- new_len--;
- #endif
- return new_len;
- }
-
- #endif /* !DOS_OS2 */
-
-
-
-
-
- #ifdef DOS_OS2
-
- /**************************************/
- /* Function set_file_time_and_close() */
- /**************************************/
-
- void set_file_time_and_close()
- /*
- * MS-DOS AND OS/2 VERSION (Mac, Unix/VMS versions are below)
- *
- * Set the output file date/time stamp according to information from the
- * zipfile directory record for this member, then close the file and set
- * its permissions (archive, hidden, read-only, system). Aside from closing
- * the file, this routine is optional (but most compilers support it).
- */
- {
- /*---------------------------------------------------------------------------
- Allocate local variables needed by OS/2 and Turbo C.
- ---------------------------------------------------------------------------*/
-
- #ifdef OS2 /* (assuming only MSC or MSC-compatible compilers
- * for this part) */
-
- union {
- FDATE fd; /* system file date record */
- UWORD zdate; /* date word */
- } ud;
-
- union {
- FTIME ft; /* system file time record */
- UWORD ztime; /* time word */
- } ut;
-
- FILESTATUS fs;
-
- #else /* !OS2 */
- #ifdef __TURBOC__
-
- union {
- struct ftime ft; /* system file time record */
- struct {
- UWORD ztime; /* date and time words */
- UWORD zdate; /* .. same format as in .ZIP file */
- } zt;
- } td;
-
- #endif /* __TURBOC__ */
- #endif /* !OS2 */
-
- /*---------------------------------------------------------------------------
- Do not attempt to set the time stamp on standard output.
- ---------------------------------------------------------------------------*/
-
- if (cflag) {
- close(outfd);
- return;
- }
-
- /*---------------------------------------------------------------------------
- Copy and/or convert time and date variables, if necessary; then set the
- file time/date.
- ---------------------------------------------------------------------------*/
-
- #ifdef OS2
- DosQFileInfo(outfd, 1, &fs, sizeof(fs));
- ud.zdate = lrec.last_mod_file_date;
- ut.ztime = lrec.last_mod_file_time;
- fs.fdateLastWrite = ud.fd;
- fs.ftimeLastWrite = ut.ft;
- fs.attrFile = pInfo->dos_attr; /* hidden, system, archive, read-only */
- DosSetFileInfo(outfd, 1, (PBYTE) &fs, sizeof(fs));
- #else /* !OS2 */
- #ifdef __TURBOC__
- td.zt.ztime = lrec.last_mod_file_time;
- td.zt.zdate = lrec.last_mod_file_date;
- setftime(outfd, &td.ft);
- #else /* !__TURBOC__ */
- _dos_setftime(outfd, lrec.last_mod_file_date, lrec.last_mod_file_time);
- #endif /* ?__TURBOC__ */
- #endif /* ?OS2 */
-
- /*---------------------------------------------------------------------------
- And finally we can close the file...at least everybody agrees on how to
- do *this*. I think... Oh yeah, also change the mode according to the
- stored file attributes, since we didn't do that when we opened the dude.
- ---------------------------------------------------------------------------*/
-
- close(outfd);
-
- #ifdef OS2
- if (longname)
- SetLongNameEA(filename, longfilename);
- #else /* !OS2 */
- #ifdef __TURBOC__
- if (_chmod(filename, 1, pInfo->dos_attr) != pInfo->dos_attr)
- fprintf(stderr, "\nwarning: file attributes may not be correct\n");
- #else /* !__TURBOC__ */
- _dos_setfileattr(filename, pInfo->dos_attr);
- #endif /* ?__TURBOC__ */
- #endif /* ?OS2 */
-
- } /* end function set_file_time_and_close() (DOS, OS/2) */
-
-
-
-
-
- #else /* !DOS_OS2 */
- #ifdef MACOS /* Mac */
-
- /**************************************/
- /* Function set_file_time_and_close() */
- /**************************************/
-
- void set_file_time_and_close()
- /*
- * MAC VERSION
- */
- {
- long m_time;
- DateTimeRec dtr;
- ParamBlockRec pbr;
- OSErr err;
-
- if (outfd != 1) {
- close(outfd);
-
- /*
- * Macintosh bases all file modification times on the number of seconds
- * elapsed since Jan 1, 1904, 00:00:00. Therefore, to maintain
- * compatibility with MS-DOS archives, which date from Jan 1, 1980,
- * with NO relation to GMT, the following conversions must be made:
- * the Year (yr) must be incremented by 1980;
- * and converted to seconds using the Mac routine Date2Secs(),
- * almost similar in complexity to the Unix version :-)
- * J. Lee
- */
-
- dtr.year = (((lrec.last_mod_file_date >> 9) & 0x7f) + 1980);
- dtr.month = ((lrec.last_mod_file_date >> 5) & 0x0f);
- dtr.day = (lrec.last_mod_file_date & 0x1f);
-
- dtr.hour = ((lrec.last_mod_file_time >> 11) & 0x1f);
- dtr.minute = ((lrec.last_mod_file_time >> 5) & 0x3f);
- dtr.second = ((lrec.last_mod_file_time & 0x1f) * 2);
-
- Date2Secs(&dtr, (unsigned long *)&m_time);
- CtoPstr(filename);
- pbr.fileParam.ioNamePtr = (StringPtr)filename;
- pbr.fileParam.ioVRefNum = pbr.fileParam.ioFVersNum =
- pbr.fileParam.ioFDirIndex = 0;
- err = PBGetFInfo(&pbr, 0L);
- pbr.fileParam.ioFlMdDat = pbr.fileParam.ioFlCrDat = m_time;
- if (err == noErr)
- err = PBSetFInfo(&pbr, 0L);
- if (err != noErr)
- printf("error: can't set the time for %s\n", filename);
-
- /* set read-only perms if needed */
- if (err != noErr && pInfo->unix_attr != 0)
- err = SetFLock((ConstStr255Param)filename, 0);
- PtoCstr(filename);
- }
- }
-
-
-
-
-
- #else /* !MACOS... */
- #if !defined(MTS) && !defined(VMS) /* && !MTS (can't do) && !VMS: only one
- * left is UNIX (for VMS use code in
- * vms.c--old VMS code below is retained
- * in case of problems and will be removed
- * in a later release) */
-
- /**************************************/
- /* Function set_file_time_and_close() */
- /**************************************/
-
- void set_file_time_and_close()
- /*
- * UNIX AND VMS VERSION (MS-DOS & OS/2, Mac versions are above)
- */
- {
- static short yday[]={0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
- long m_time;
- int yr, mo, dy, hh, mm, ss, leap, days=0;
- #ifdef VMS
- # define YRBASE 0
- char timbuf[24];
- static char *month[] = {"JAN", "FEB", "MAR", "APR", "MAY", "JUN",
- "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"};
- struct VMStimbuf {
- char *actime; /* VMS revision date, ASCII format */
- char *modtime; /* VMS creation date, ASCII format */
- } ascii_times;
- #else /* !VMS */
- struct utimbuf {
- time_t actime; /* new access time */
- time_t modtime; /* new modification time */
- } tp;
- #ifdef AMIGA
- # define YRBASE 1978 /* in AmigaDos, counting begins 01-Jan-1978 */
- struct DateStamp myadate;
- /* extern char *_TZ; no longer used? */
- #else /* !AMIGA */
- # define YRBASE 1970
- #ifdef BSD
- static struct timeb tbp;
- #else /* !BSD */
- extern long timezone;
- #endif /* ?BSD */
- #endif /* ?AMIGA */
- #endif /* ?VMS */
-
-
- /*
- * Close the file *before* setting its time under Unix, AmigaDos and VMS.
- */
- #ifdef AMIGA
- if (cflag) /* can't set time on stdout */
- return;
- close(outfd);
- #else /* !AMIGA */
- close(outfd);
- if (cflag) /* can't set time on stdout */
- return;
- #endif /* ?AMIGA */
-
- /*
- * These date conversions look a little weird, so I'll explain.
- * UNIX bases all file modification times on the number of seconds
- * elapsed since Jan 1, 1970, 00:00:00 GMT. Therefore, to maintain
- * compatibility with MS-DOS archives, which date from Jan 1, 1980,
- * with NO relation to GMT, the following conversions must be made:
- * the Year (yr) must be incremented by 10;
- * the Date (dy) must be decremented by 1;
- * and the whole mess must be adjusted by TWO factors:
- * relationship to GMT (ie.,Pacific Time adds 8 hrs.),
- * and whether or not it is Daylight Savings Time.
- * Also, the usual conversions must take place to account for leap years,
- * etc.
- * C. Seaman
- */
-
- /* dissect date */
- yr = ((lrec.last_mod_file_date >> 9) & 0x7f) + (1980 - YRBASE);
- mo = ((lrec.last_mod_file_date >> 5) & 0x0f) - 1;
- dy = (lrec.last_mod_file_date & 0x1f) - 1;
-
- /* dissect time */
- hh = (lrec.last_mod_file_time >> 11) & 0x1f;
- mm = (lrec.last_mod_file_time >> 5) & 0x3f;
- ss = (lrec.last_mod_file_time & 0x1f) * 2;
-
- #ifdef VMS
- sprintf(timbuf, "%02d-%3s-%04d %02d:%02d:%02d.00", dy+1, month[mo],
- yr, hh, mm, ss);
-
- ascii_times.actime = timbuf;
- ascii_times.modtime = timbuf;
-
- if ((mm = VMSmunch(filename, SET_TIMES, &ascii_times)) != RMS$_NMF)
- fprintf(stderr, "error %d: can't set the time for %s\n", mm, filename);
-
- #else /* !VMS */
- /* leap = # of leap years from BASE up to but not including current year */
- leap = ((yr + YRBASE - 1) / 4); /* leap year base factor */
-
- /* How many days from BASE to this year? (& add expired days this year) */
- days = (yr * 365) + (leap - 492) + yday[mo];
-
- /* if year is a leap year and month is after February, add another day */
- if ((mo > 1) && ((yr+YRBASE)%4 == 0) && ((yr+YRBASE) != 2100))
- ++days; /* OK through 2199 */
-
- #ifdef AMIGA
- /* _TZ = getenv("TZ"); does Amiga not have TZ and tzset() after all? */
- myadate.ds_Days = days+dy-2; /* off by one? */
- myadate.ds_Minute = hh*60+mm;
- myadate.ds_Tick = ss*TICKS_PER_SECOND;
-
- if (!(SetFileDate(filename, &myadate)))
- fprintf(stderr, "error: can't set the time for %s\n", filename);
-
- #else /* !AMIGA */
- /* convert date & time to seconds relative to 00:00:00, 01/01/YRBASE */
- m_time = ((days + dy) * 86400) + (hh * 3600) + (mm * 60) + ss;
-
- #ifdef BSD
- ftime(&tbp);
- m_time += tbp.timezone * 60L;
- #else /* !BSD */
- tzset(); /* set `timezone' */
- m_time += timezone; /* account for timezone differences */
- #endif /* ?BSD */
-
- if (localtime(&m_time)->tm_isdst)
- m_time -= 60L * 60L; /* adjust for daylight savings time */
-
- tp.actime = m_time; /* set access time */
- tp.modtime = m_time; /* set modification time */
-
- /* set the time stamp on the file */
- if (utime(filename, &tp))
- fprintf(stderr, "error: can't set the time for %s\n", filename);
- #endif /* ?AMIGA */
- #endif /* ?VMS */
- }
-
- #endif /* !MTS && !VMS */
- #endif /* ?MACOS */
- #endif /* ?DOS_OS2 */
-
-
-
-
-
- /*******************************/
- /* Non-echoing password code */
- /*******************************/
-
- #ifdef EMX32
- # undef DOS_OS2
- # undef MSVMS
- #endif
-
- #ifdef CRYPT
- #ifndef DOS_OS2
- #ifdef VMS
-
- int echo(opt)
- int opt;
- {
- /*---------------------------------------------------------------------------
- Based on VMSmunch.c, which in turn was based on Joe Meadows' file.c code.
- ---------------------------------------------------------------------------
- * For VMS v5.x:
- * IO$_SENSEMODE/SETMODE info: Programming, Vol. 7A, System Programming,
- * I/O User's: Part I, sec. 8.4.1.1, 8.4.3, 8.4.5, 8.6
- * sys$assign(), sys$qio() info: Programming, Vol. 4B, System Services,
- * System Services Reference Manual, pp. sys-23, sys-379
- * fixed-length descriptor info: Programming, Vol. 3, System Services,
- * Intro to System Routines, sec. 2.9.2
- * GRR, 15 Aug 91
- ---------------------------------------------------------------------------*/
- static struct dsc$descriptor_s DevDesc =
- {9, DSC$K_DTYPE_T, DSC$K_CLASS_S, "SYS$INPUT"};
- /* {dsc$w_length, dsc$b_dtype, dsc$b_class, dsc$a_pointer}; */
- static short DevChan, iosb[4];
- static long i, status;
- static unsigned long oldmode[2], newmode[2]; /* each = 8 bytes */
-
-
- /*---------------------------------------------------------------------------
- Assign a channel to standard input.
- ---------------------------------------------------------------------------*/
-
- status = sys$assign(&DevDesc, &DevChan, 0, 0);
- #ifdef DEBUG
- printf("echo: sys$assign returns status = %ld\n", status);
- #endif /* DEBUG */
- if (!(status & 1)) return(status);
-
- /*---------------------------------------------------------------------------
- Use sys$qio and the IO$_SENSEMODE function to determine the current tty
- status (for password reading, could use IO$_READVBLK function instead,
- but echo on/off will be more general).
- ---------------------------------------------------------------------------*/
-
- status = sys$qio(0, DevChan, IO$_SENSEMODE, &iosb, 0, 0,
- oldmode, 8, 0, 0, 0, 0);
- #ifdef DEBUG
- printf("echo: sys$qio(IO$_SENSEMODE) returns status = %ld\n", status);
- printf("echo: sys$qio(IO$_SENSEMODE) returns iosb status = %d\n",
- iosb[0]);
- #endif /* DEBUG */
- if (!(status & 1)) return(status);
- status = iosb[0];
- if (!(status & 1)) return(status);
-
- /*---------------------------------------------------------------------------
- Copy old mode into new-mode buffer, then modify to be either NOECHO or
- ECHO (depending on function argument opt).
- ---------------------------------------------------------------------------*/
-
- newmode[0] = oldmode[0];
- newmode[1] = oldmode[1];
- if (opt == OFF)
- newmode[1] |= TT$M_NOECHO; /* set NOECHO bit */
- else
- newmode[1] &= ~((unsigned long) TT$M_NOECHO); /* clear NOECHO bit */
- #ifdef DEBUG
- printf("echo: current terminal status = %lx\n", oldmode[1]);
- printf("echo: current echo status = %s\n",
- (oldmode[1] & TT$M_NOECHO)? "noecho" : "echo");
- printf("echo: new terminal status = %lx\n", newmode[1]);
- printf("echo: new echo status = %s\n",
- (newmode[1] & TT$M_NOECHO)? "noecho" : "echo");
- #endif /* DEBUG */
-
- /*---------------------------------------------------------------------------
- Use the IO$_SETMODE function to change the tty status.
- ---------------------------------------------------------------------------*/
-
- status = sys$qio(0, DevChan, IO$_SETMODE, &iosb, 0, 0,
- newmode, 8, 0, 0, 0, 0);
- #ifdef DEBUG
- printf("echo: sys$qio(IO$_SETMODE) returns status = %ld\n", status);
- printf("echo: sys$qio(IO$_SETMODE) returns iosb status = %d\n", iosb[0]);
- #endif /* DEBUG */
- if (!(status & 1)) return(status);
- status = iosb[0];
- if (!(status & 1)) return(status);
-
- /*---------------------------------------------------------------------------
- Deassign the sys$input channel by way of clean-up, then exit happily.
- ---------------------------------------------------------------------------*/
-
- status = sys$dassgn(DevChan);
- #ifdef DEBUG
- printf("echo: sys$dassgn returns status = %ld\n\n", status);
- #endif /* DEBUG */
- if (!(status & 1)) return(status);
-
- return SS$_NORMAL; /* we be happy */
-
- } /* end function echo() */
-
-
-
-
-
- #else /* !VMS */
-
- static int echofd = -1; /* file descriptor whose echo is off */
-
- void echoff(f)
- int f; /* file descriptor to turn echo off on */
- /* Turn echo off for file descriptor f. Assumes that f is a tty device. */
- {
- struct sgttyb sg; /* tty device structure */
-
- echofd = f;
- GTTY(f, &sg); /* get settings */
- sg.sg_flags &= ~ECHO; /* turn echo off */
- STTY(f, &sg);
- }
-
-
-
- void echon()
- /* Turn echo back on for file descriptor echofd. */
- {
- struct sgttyb sg; /* tty device structure */
-
- if (echofd != -1)
- {
- GTTY(echofd, &sg); /* get settings */
- sg.sg_flags |= ECHO; /* turn echo on */
- STTY(echofd, &sg);
- echofd = -1;
- }
- }
-
- #endif /* ?VMS */
- #endif /* !DOS_OS2 */
-
-
-
-
-
- char *getp(m, p, n)
- char *m; /* prompt for password */
- char *p; /* return value: line input */
- int n; /* bytes available in p[] */
- /* Get a password of length n-1 or less into *p using the prompt *m.
- The entered password is not echoed. Return p on success, NULL on
- failure (can't get controlling tty). */
- {
- char c; /* one-byte buffer for read() to use */
- int i; /* number of characters input */
- char *w; /* warning on retry */
-
- #ifndef DOS_OS2
- #ifdef VMS
- echo(OFF); /* turn echo off */
- #else /* !VMS */
- int f; /* file decsriptor for tty device */
-
- /* Turn off echo on tty */
- if (!isatty(2))
- return NULL; /* error if not tty */
- if ((f = open(ttyname(2), 0, 0)) == -1)
- return NULL;
- echoff(f); /* turn echo off */
- #endif /* ?VMS */
- #endif /* !DOS_OS2 */
-
- /* Get password */
- w = "";
- do {
- #ifdef VMS /* bug: VMS adds '\n' to NULL fputs (apparently) */
- if (*w)
- #endif /* VMS */
- fputs(w, stderr); /* warning if back again */
- fputs(m, stderr); /* prompt */
- fflush(stderr);
- i = 0;
- do { /* read line, keeping n */
- #ifdef MSVMS
- if ((c = (char)getch()) == '\r')
- c = '\n';
- #else /* !MSVMS */
- read(f, &c, 1);
- #endif /* ?MSVMS */
- if (i < n)
- p[i++] = c;
- } while (c != '\n');
- putc('\n', stderr); fflush(stderr);
- w = "(line too long--try again)\n";
- } while (p[i-1] != '\n');
- p[i-1] = 0; /* terminate at newline */
-
- #ifndef DOS_OS2
- #ifdef VMS
- echo(ON); /* turn echo back on */
- #else /* !VMS */
- /* Turn echo back on */
- echon(); /* turn echo back on */
- close(f);
- #endif /* ?VMS */
- #endif /* !DOS_OS2 */
-
- /* Return pointer to password */
- return p;
- }
-
- #endif /* CRYPT */
-