2 * Copyright (c) 1992 Keith Muller.
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
7 * Keith Muller of the University of California, San Diego.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * @(#)ar_io.c 8.2 (Berkeley) 4/18/94
38 * $FreeBSD: src/bin/pax/ar_io.c,v 1.12.2.1 2001/08/01 05:03:11 obrien Exp $
39 * $DragonFly: src/bin/pax/ar_io.c,v 1.11 2006/09/27 21:58:08 pavalos Exp $
42 #include <sys/types.h>
43 #include <sys/ioctl.h>
60 * Routines which deal directly with the archive I/O device/file.
63 #define DMOD 0666 /* default mode of created archives */
64 #define EXT_MODE O_RDONLY /* open mode for list/extract */
65 #define AR_MODE (O_WRONLY | O_CREAT | O_TRUNC) /* mode for archive */
66 #define APP_MODE O_RDWR /* mode for append */
67 #define STDO "<STDOUT>" /* pseudo name for stdout */
68 #define STDN "<STDIN>" /* pseudo name for stdin */
69 static int arfd
= -1; /* archive file descriptor */
70 static int artyp
= ISREG
; /* archive type: file/FIFO/tape */
71 static int arvol
= 1; /* archive volume number */
72 static int lstrval
= -1; /* return value from last i/o */
73 static int io_ok
; /* i/o worked on volume after resync */
74 static int did_io
; /* did i/o ever occur on volume? */
75 static int done
; /* set via tty termination */
76 static struct stat arsb
; /* stat of archive device at open */
77 static int invld_rec
; /* tape has out of spec record size */
78 static int wr_trail
= 1; /* trailer was rewritten in append */
79 static int can_unlnk
= 0; /* do we unlink null archives? */
80 char *arcname
; /* printable name of archive */
81 const char *gzip_program
; /* name of gzip program */
82 static pid_t zpid
= -1; /* pid of child process */
83 int force_one_volume
; /* 1 if we ignore volume changes */
85 static int get_phys (void);
86 extern sigset_t s_mask
;
87 static void ar_start_gzip (int, const char *, int);
91 * Opens the next archive volume. Determines the type of the device and
92 * sets up block sizes as required by the archive device and the format.
93 * Note: we may be called with name == NULL on the first open only.
95 * -1 on failure, 0 otherwise
106 can_unlnk
= did_io
= io_ok
= invld_rec
= 0;
111 * open based on overall operation mode
119 } else if ((arfd
= open(name
, EXT_MODE
, DMOD
)) < 0)
120 syswarn(0, errno
, "Failed open to read on %s", name
);
121 if (arfd
!= -1 && gzip_program
!= NULL
)
122 ar_start_gzip(arfd
, gzip_program
, 0);
126 arfd
= STDOUT_FILENO
;
128 } else if ((arfd
= open(name
, AR_MODE
, DMOD
)) < 0)
129 syswarn(0, errno
, "Failed open to write on %s", name
);
132 if (arfd
!= -1 && gzip_program
!= NULL
)
133 ar_start_gzip(arfd
, gzip_program
, 1);
137 arfd
= STDOUT_FILENO
;
139 } else if ((arfd
= open(name
, APP_MODE
, DMOD
)) < 0)
140 syswarn(0, errno
, "Failed open to read/write on %s",
145 * arfd not used in COPY mode
154 if (chdname
!= NULL
) {
155 if (chdir(chdname
) != 0) {
156 syswarn(1, errno
, "Failed chdir to %s", chdname
);
161 * set up is based on device type
163 if (fstat(arfd
, &arsb
) < 0) {
164 syswarn(0, errno
, "Failed stat on %s", arcname
);
170 if (S_ISDIR(arsb
.st_mode
)) {
171 paxwarn(0, "Cannot write an archive on top of a directory %s",
179 if (S_ISCHR(arsb
.st_mode
))
180 artyp
= ioctl(arfd
, MTIOCGET
, &mb
) ? ISCHR
: ISTAPE
;
181 else if (S_ISBLK(arsb
.st_mode
))
183 else if ((lseek(arfd
, (off_t
)0L, SEEK_CUR
) == -1) && (errno
== ESPIPE
))
189 * make sure we beyond any doubt that we only can unlink regular files
195 * if we are writing, we are done
197 if (act
== ARCHIVE
) {
198 blksz
= rdblksz
= wrblksz
;
204 * set default blksz on read. APPNDs writes rdblksz on the last volume
205 * On all new archive volumes, we shift to wrblksz (if the user
206 * specified one, otherwise we will continue to use rdblksz). We
207 * must set blocksize based on what kind of device the archive is
213 * Tape drives come in at least two flavors. Those that support
214 * variable sized records and those that have fixed sized
215 * records. They must be treated differently. For tape drives
216 * that support variable sized records, we must make large
217 * reads to make sure we get the entire record, otherwise we
218 * will just get the first part of the record (up to size we
219 * asked). Tapes with fixed sized records may or may not return
220 * multiple records in a single read. We really do not care
221 * what the physical record size is UNLESS we are going to
222 * append. (We will need the physical block size to rewrite
223 * the trailer). Only when we are appending do we go to the
224 * effort to figure out the true PHYSICAL record size.
226 blksz
= rdblksz
= MAXBLK
;
232 * Blocksize is not a major issue with these devices (but must
233 * be kept a multiple of 512). If the user specified a write
234 * block size, we use that to read. Under append, we must
235 * always keep blksz == rdblksz. Otherwise we go ahead and use
236 * the device optimal blocksize as (and if) returned by stat
237 * and if it is within pax specs.
239 if ((act
== APPND
) && wrblksz
) {
240 blksz
= rdblksz
= wrblksz
;
244 if ((arsb
.st_blksize
> 0) && (arsb
.st_blksize
< MAXBLK
) &&
245 ((arsb
.st_blksize
% BLKMULT
) == 0))
246 rdblksz
= arsb
.st_blksize
;
250 * For performance go for large reads when we can without harm
252 if ((act
== APPND
) || (artyp
== ISCHR
))
259 * if the user specified wrblksz works, use it. Under appends
260 * we must always keep blksz == rdblksz
262 if ((act
== APPND
) && wrblksz
&& ((arsb
.st_size
%wrblksz
)==0)){
263 blksz
= rdblksz
= wrblksz
;
267 * See if we can find the blocking factor from the file size
269 for (rdblksz
= MAXBLK
; rdblksz
> 0; rdblksz
-= BLKMULT
)
270 if ((arsb
.st_size
% rdblksz
) == 0)
273 * When we cannot find a match, we may have a flawed archive.
278 * for performance go for large reads when we can
287 * should never happen, worst case, slow...
289 blksz
= rdblksz
= BLKMULT
;
298 * closes archive device, increments volume number, and prints i/o summary
306 did_io
= io_ok
= flcnt
= 0;
311 * Close archive file. This may take a LONG while on tapes (we may be
312 * forced to wait for the rewind to complete) so tell the user what is
313 * going on (this avoids the user hitting control-c thinking pax is
316 if (vflag
&& (artyp
== ISTAPE
)) {
320 "%s: Waiting for tape drive close to complete...",
326 * if nothing was written to the archive (and we created it), we remove
329 if (can_unlnk
&& (fstat(arfd
, &arsb
) == 0) && (S_ISREG(arsb
.st_mode
)) &&
330 (arsb
.st_size
== 0)) {
336 * for a quick extract/list, pax frequently exits before the child
339 if ((act
== LIST
|| act
== EXTRACT
) && nflag
&& zpid
> 0)
344 /* Do not exit before child to ensure data integrity */
346 waitpid(zpid
, &status
, 0);
348 if (vflag
&& (artyp
== ISTAPE
)) {
349 fputs("done.\n", listf
);
355 if (!io_ok
&& !did_io
) {
362 * The volume number is only increased when the last device has data
363 * and we have already determined the archive format.
374 * Print out a summary of I/O for this archive volume.
382 * If we have not determined the format yet, we just say how many bytes
383 * we have skipped over looking for a header to id. there is no way we
384 * could have written anything yet.
387 fprintf(listf
, "%s: unknown format, %jd bytes skipped.\n",
388 argv0
, (intmax_t)rdcnt
);
394 if (strcmp(NM_CPIO
, argv0
) == 0)
395 fprintf(listf
, "%jdu blocks\n", (intmax_t)((rdcnt
? rdcnt
: wrcnt
) / 5120));
396 else if (strcmp(NM_TAR
, argv0
) != 0)
398 "%s: %s vol %d, %lu files, %jd bytes read, %jd bytes written.\n",
399 argv0
, frmt
->name
, arvol
-1, flcnt
,
400 (intmax_t)rdcnt
, (intmax_t)wrcnt
);
407 * drain any archive format independent padding from an archive read
408 * from a socket or a pipe. This is to prevent the process on the
409 * other side of the pipe from getting a SIGPIPE (pax will stop
410 * reading an archive once a format dependent trailer is detected).
419 * we only drain from a pipe/socket. Other devices can be closed
420 * without reading up to end of file. We sure hope that pipe is closed
421 * on the other side so we will get an EOF.
423 if ((artyp
!= ISPIPE
) || (lstrval
<= 0))
427 * keep reading until pipe is drained
429 while ((res
= read(arfd
, drbuf
, sizeof(drbuf
))) > 0)
436 * Set up device right before switching from read to write in an append.
437 * device dependent code (if required) to do this should be added here.
438 * For all archive devices we are already positioned at the place we want
439 * to start writing when this routine is called.
441 * 0 if all ready to write, -1 otherwise
450 * we must make sure the trailer is rewritten on append, ar_next()
451 * will stop us if the archive containing the trailer was not written
456 * Add any device dependent code as required here
461 * Ok we have an archive in a regular file. If we were rewriting a
462 * file, we must get rid of all the stuff after the current offset
463 * (it was not written by pax).
465 if (((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) < 0) ||
466 (ftruncate(arfd
, cpos
) < 0)) {
467 syswarn(1, errno
, "Unable to truncate archive file");
475 * check if the last volume in the archive allows appends. We cannot check
476 * this until we are ready to write since there is no spec that says all
477 * volumes in a single archive have to be of the same type...
479 * 0 if we can append, -1 otherwise.
485 if (artyp
== ISPIPE
) {
486 paxwarn(1, "Cannot append to an archive obtained from a pipe.");
492 paxwarn(1,"Cannot append, device record size %d does not support %s spec",
499 * read up to a specified number of bytes from the archive into the
500 * supplied buffer. When dealing with tapes we may not always be able to
503 * Number of bytes in buffer. 0 for end of file, -1 for a read error.
507 ar_read(char *buf
, int cnt
)
512 * if last i/o was in error, no more reads until reset or new volume
518 * how we read must be based on device type
522 if ((res
= read(arfd
, buf
, cnt
)) > 0) {
524 * CAUTION: tape systems may not always return the same
525 * sized records so we leave blksz == MAXBLK. The
526 * physical record size that a tape drive supports is
527 * very hard to determine in a uniform and portable
531 if (res
!= rdblksz
) {
533 * Record size changed. If this happens on
534 * any record after the first, we probably have
535 * a tape drive which has a fixed record size
536 * (we are getting multiple records in a single
537 * read). Watch out for record blocking that
538 * violates pax spec (must be a multiple of
542 if (rdblksz
% BLKMULT
)
554 * Files are so easy to deal with. These other things cannot
555 * be trusted at all. So when we are dealing with character
556 * devices and pipes we just take what they have ready for us
557 * and return. Trying to do anything else with them runs the
560 if ((res
= read(arfd
, buf
, cnt
)) > 0) {
568 * We are in trouble at this point, something is broken...
572 syswarn(1, errno
, "Failed read on archive volume %d", arvol
);
574 paxwarn(0, "End of archive volume %d reached", arvol
);
580 * Write a specified number of bytes in supplied buffer to the archive
581 * device so it appears as a single "block". Deals with errors and tries
582 * to recover when faced with short writes.
584 * Number of bytes written. 0 indicates end of volume reached and with no
585 * flaws (as best that can be detected). A -1 indicates an unrecoverable
586 * error in the archive occurred.
590 ar_write(char *buf
, int bsz
)
596 * do not allow pax to create a "bad" archive. Once a write fails on
597 * an archive volume prevent further writes to it.
602 if ((res
= write(arfd
, buf
, bsz
)) == bsz
) {
608 * write broke, see what we can do with it. We try to send any partial
609 * writes that may violate pax spec to the next archive volume.
618 if ((res
> 0) && (res
% BLKMULT
)) {
620 * try to fix up partial writes which are not BLKMULT
621 * in size by forcing the runt record to next archive
624 if ((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) < 0)
627 if (ftruncate(arfd
, cpos
) < 0)
635 * if file is out of space, handle it like a return of 0
637 if ((errno
== ENOSPC
) || (errno
== EFBIG
) || (errno
== EDQUOT
))
645 if (errno
== EACCES
) {
646 paxwarn(0, "Write failed, archive is write protected.");
651 * see if we reached the end of media, if so force a change to
654 if ((errno
== ENOSPC
) || (errno
== EIO
) || (errno
== ENXIO
))
660 * we cannot fix errors to these devices
666 * Better tell the user the bad news...
667 * if this is a block aligned archive format, we may have a bad archive
668 * if the format wants the header to start at a BLKMULT boundary. While
669 * we can deal with the mis-aligned data, it violates spec and other
670 * archive readers will likely fail. if the format is not block
671 * aligned, the user may be lucky (and the archive is ok).
680 * If we were trying to rewrite the trailer and it didn't work, we
681 * must quit right away.
683 if (!wr_trail
&& (res
<= 0)) {
684 paxwarn(1,"Unable to append, trailer re-write failed. Quitting.");
689 paxwarn(0, "End of archive volume %d reached", arvol
);
691 syswarn(1, errno
, "Failed write to archive volume: %d", arvol
);
692 else if (!frmt
->blkalgn
|| ((res
% frmt
->blkalgn
) == 0))
693 paxwarn(0,"WARNING: partial archive write. Archive MAY BE FLAWED");
695 paxwarn(1,"WARNING: partial archive write. Archive IS FLAWED");
701 * Try to move past a bad spot on a flawed archive as needed to continue
702 * I/O. Clears error flags to allow I/O to continue.
704 * 0 when ok to try i/o again, -1 otherwise.
716 * Fail resync attempts at user request (done) or if this is going to be
717 * an update/append to a existing archive. if last i/o hit media end,
718 * we need to go to the next volume not try a resync
720 if ((done
> 0) || (lstrval
== 0))
723 if ((act
== APPND
) || (act
== ARCHIVE
)) {
724 paxwarn(1, "Cannot allow updates to an archive with flaws.");
733 * if the last i/o was a successful data transfer, we assume
734 * the fault is just a bad record on the tape that we are now
735 * past. If we did not get any data since the last resync try
736 * to move the tape forward one PHYSICAL record past any
737 * damaged tape section. Some tape drives are stubborn and need
747 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0)
755 * try to step over the bad part of the device.
758 if (((fsbz
= arsb
.st_blksize
) <= 0) || (artyp
!= ISREG
))
760 if ((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) < 0)
762 mpos
= fsbz
- (cpos
% (off_t
)fsbz
);
763 if (lseek(arfd
, mpos
, SEEK_CUR
) < 0)
770 * cannot recover on these archive device types
776 paxwarn(1, "Unable to recover from an archive read failure.");
779 paxwarn(0, "Attempting to recover from an archive read failure.");
785 * Move the I/O position within the archive forward the specified number of
786 * bytes as supported by the device. If we cannot move the requested
787 * number of bytes, return the actual number of bytes moved in skipped.
789 * 0 if moved the requested distance, -1 on complete failure, 1 on
790 * partial move (the amount moved is in skipped)
794 ar_fow(off_t sksz
, off_t
*skipped
)
804 * we cannot move forward at EOF or error
810 * Safer to read forward on devices where it is hard to find the end of
811 * the media without reading to it. With tapes we cannot be sure of the
812 * number of physical blocks to skip (we do not know physical block
813 * size at this point), so we must only read forward on tapes!
819 * figure out where we are in the archive
821 if ((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) >= 0) {
823 * we can be asked to move farther than there are bytes in this
824 * volume, if so, just go to file end and let normal buf_fill()
825 * deal with the end of file (it will go to next volume by
828 if ((mpos
= cpos
+ sksz
) > arsb
.st_size
) {
829 *skipped
= arsb
.st_size
- cpos
;
833 if (lseek(arfd
, mpos
, SEEK_SET
) >= 0)
836 syswarn(1, errno
, "Forward positioning operation on archive failed");
843 * move the i/o position within the archive backwards the specified byte
844 * count as supported by the device. With tapes drives we RESET rdblksz to
845 * the PHYSICAL blocksize.
846 * NOTE: We should only be called to move backwards so we can rewrite the
847 * last records (the trailer) of an archive (APPEND).
849 * 0 if moved the requested distance, -1 on complete failure
860 * make sure we do not have try to reverse on a flawed archive
870 * cannot go backwards on these critters
872 paxwarn(1, "Reverse positioning on pipes is not supported.");
883 * For things other than files, backwards movement has a very
884 * high probability of failure as we really do not know the
885 * true attributes of the device we are talking to (the device
886 * may not even have the ability to lseek() in any direction).
887 * First we figure out where we are in the archive.
889 if ((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) < 0) {
891 "Unable to obtain current archive byte offset");
897 * we may try to go backwards past the start when the archive
898 * is only a single record. If this happens and we are on a
899 * multi-volume archive, we need to go to the end of the
900 * previous volume and continue our movement backwards from
903 if ((cpos
-= sksz
) < (off_t
)0L) {
906 * this should never happen
908 paxwarn(1,"Reverse position on previous volume.");
914 if (lseek(arfd
, cpos
, SEEK_SET
) < 0) {
915 syswarn(1, errno
, "Unable to seek archive backwards");
922 * Calculate and move the proper number of PHYSICAL tape
923 * blocks. If the sksz is not an even multiple of the physical
924 * tape size, we cannot do the move (this should never happen).
925 * (We also cannot handle trailers spread over two vols.)
926 * get_phys() also makes sure we are in front of the filemark.
928 if ((phyblk
= get_phys()) <= 0) {
934 * make sure future tape reads only go by physical tape block
935 * size (set rdblksz to the real size).
940 * if no movement is required, just return (we must be after
941 * get_phys() so the physical blocksize is properly set)
947 * ok we have to move. Make sure the tape drive can do it.
951 "Tape drive unable to backspace requested amount");
957 * move backwards the requested number of bytes
960 mb
.mt_count
= sksz
/phyblk
;
961 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
962 syswarn(1,errno
, "Unable to backspace tape %d blocks.",
975 * Determine the physical block size on a tape drive. We need the physical
976 * block size so we know how many bytes we skip over when we move with
977 * mtio commands. We also make sure we are BEFORE THE TAPE FILEMARK when
979 * This is one really SLOW routine...
981 * physical block size if ok (ok > 0), -1 otherwise
994 * move to the file mark, and then back up one record and read it.
995 * this should tell us the physical record size the tape is using.
999 * we know we are at file mark when we get back a 0 from
1002 while ((res
= read(arfd
, scbuf
, sizeof(scbuf
))) > 0)
1005 syswarn(1, errno
, "Unable to locate tape filemark.");
1011 * move backwards over the file mark so we are at the end of the
1016 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1017 syswarn(1, errno
, "Unable to backspace over tape filemark.");
1022 * move backwards so we are in front of the last record and read it to
1023 * get physical tape blocksize.
1027 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1028 syswarn(1, errno
, "Unable to backspace over last tape block.");
1031 if ((phyblk
= read(arfd
, scbuf
, sizeof(scbuf
))) <= 0) {
1032 syswarn(1, errno
, "Cannot determine archive tape blocksize.");
1037 * read forward to the file mark, then back up in front of the filemark
1038 * (this is a bit paranoid, but should be safe to do).
1040 while ((res
= read(arfd
, scbuf
, sizeof(scbuf
))) > 0)
1043 syswarn(1, errno
, "Unable to locate tape filemark.");
1048 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1049 syswarn(1, errno
, "Unable to backspace over tape filemark.");
1054 * set lstrval so we know that the filemark has not been seen
1059 * return if there was no padding
1065 * make sure we can move backwards over the padding. (this should
1068 if (padsz
% phyblk
) {
1069 paxwarn(1, "Tape drive unable to backspace requested amount");
1074 * move backwards over the padding so the head is where it was when
1075 * we were first called (if required).
1078 mb
.mt_count
= padsz
/phyblk
;
1079 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1080 syswarn(1,errno
,"Unable to backspace tape over %d pad blocks",
1089 * prompts the user for the next volume in this archive. For some devices
1090 * we may allow the media to be changed. Otherwise a new archive is
1091 * prompted for. By pax spec, if there is no controlling tty or an eof is
1092 * read on tty input, we must quit pax.
1094 * 0 when ready to continue, -1 when all done
1100 char buf
[PAXPATHLEN
+2];
1101 static int freeit
= 0;
1105 * WE MUST CLOSE THE DEVICE. A lot of devices must see last close, (so
1106 * things like writing EOF etc will be done) (Watch out ar_close() can
1107 * also be called via a signal handler, so we must prevent a race.
1109 if (sigprocmask(SIG_BLOCK
, &s_mask
, &o_mask
) < 0)
1110 syswarn(0, errno
, "Unable to set signal mask");
1112 if (sigprocmask(SIG_SETMASK
, &o_mask
, NULL
) < 0)
1113 syswarn(0, errno
, "Unable to restore signal mask");
1115 if (done
|| !wr_trail
|| force_one_volume
|| strcmp(NM_TAR
, argv0
) == 0)
1118 tty_prnt("\nATTENTION! %s archive volume change required.\n", argv0
);
1121 * if i/o is on stdin or stdout, we cannot reopen it (we do not know
1122 * the name), the user will be forced to type it in.
1124 if (strcmp(arcname
, STDO
) && strcmp(arcname
, STDN
) && (artyp
!= ISREG
)
1125 && (artyp
!= ISPIPE
)) {
1126 if (artyp
== ISTAPE
) {
1127 tty_prnt("%s ready for archive tape volume: %d\n",
1129 tty_prnt("Load the NEXT TAPE on the tape drive");
1131 tty_prnt("%s ready for archive volume: %d\n",
1133 tty_prnt("Load the NEXT STORAGE MEDIA (if required)");
1136 if ((act
== ARCHIVE
) || (act
== APPND
))
1137 tty_prnt(" and make sure it is WRITE ENABLED.\n");
1142 tty_prnt("Type \"y\" to continue, \".\" to quit %s,",
1144 tty_prnt(" or \"s\" to switch to new device.\nIf you");
1145 tty_prnt(" cannot change storage media, type \"s\"\n");
1146 tty_prnt("Is the device ready and online? > ");
1148 if ((tty_read(buf
,sizeof(buf
))<0) || !strcmp(buf
,".")){
1151 tty_prnt("Quitting %s!\n", argv0
);
1156 if ((buf
[0] == '\0') || (buf
[1] != '\0')) {
1157 tty_prnt("%s unknown command, try again\n",buf
);
1165 * we are to continue with the same device
1167 if (ar_open(arcname
) >= 0)
1169 tty_prnt("Cannot re-open %s, try again\n",
1175 * user wants to open a different device
1177 tty_prnt("Switching to a different archive\n");
1180 tty_prnt("%s unknown command, try again\n",buf
);
1186 tty_prnt("Ready for archive volume: %d\n", arvol
);
1189 * have to go to a different archive
1192 tty_prnt("Input archive name or \".\" to quit %s.\n", argv0
);
1193 tty_prnt("Archive name > ");
1195 if ((tty_read(buf
, sizeof(buf
)) < 0) || !strcmp(buf
, ".")) {
1198 tty_prnt("Quitting %s!\n", argv0
);
1202 if (buf
[0] == '\0') {
1203 tty_prnt("Empty file name, try again\n");
1206 if (!strcmp(buf
, "..")) {
1207 tty_prnt("Illegal file name: .. try again\n");
1210 if (strlen(buf
) > PAXPATHLEN
) {
1211 tty_prnt("File name too long, try again\n");
1216 * try to open new archive
1218 if (ar_open(buf
) >= 0) {
1223 if ((arcname
= strdup(buf
)) == NULL
) {
1226 paxwarn(0, "Cannot save archive name.");
1232 tty_prnt("Cannot open %s, try again\n", buf
);
1240 * starts the gzip compression/decompression process as a child, using magic
1241 * to keep the fd the same in the calling function (parent).
1244 ar_start_gzip(int fd
, const char *gzip_program
, int wr
)
1250 err(1, "could not pipe");
1253 err(1, "could not fork");
1265 dup2(fds
[0], STDIN_FILENO
);
1266 dup2(fd
, STDOUT_FILENO
);
1269 dup2(fds
[1], STDOUT_FILENO
);
1270 dup2(fd
, STDIN_FILENO
);
1275 if (execlp(gzip_program
, gzip_program
, gzip_flags
, NULL
) < 0)
1276 err(1, "could not exec");