1 /* $OpenBSD: ar_io.c,v 1.17 1997/09/01 18:29:42 deraadt Exp $ */
2 /* $NetBSD: ar_io.c,v 1.5 1996/03/26 23:54:13 mrg Exp $ */
5 * Copyright (c) 1992 Keith Muller.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
10 * Keith Muller of the University of California, San Diego.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 static char sccsid
[] = "@(#)ar_io.c 8.2 (Berkeley) 4/18/94";
45 static char rcsid
[] __attribute__((__unused__
)) = "$OpenBSD: ar_io.c,v 1.17 1997/09/01 18:29:42 deraadt Exp $";
49 #include <sys/types.h>
52 #include <sys/ioctl.h>
54 #include <sys/param.h>
68 * Routines which deal directly with the archive I/O device/file.
71 #define DMOD 0666 /* default mode of created archives */
72 #define EXT_MODE O_RDONLY /* open mode for list/extract */
73 #define AR_MODE (O_WRONLY | O_CREAT | O_TRUNC) /* mode for archive */
74 #define APP_MODE O_RDWR /* mode for append */
75 #define STDO "<STDOUT>" /* psuedo name for stdout */
76 #define STDN "<STDIN>" /* psuedo name for stdin */
77 static int arfd
= -1; /* archive file descriptor */
78 static int artyp
= ISREG
; /* archive type: file/FIFO/tape */
79 static int arvol
= 1; /* archive volume number */
80 static int lstrval
= -1; /* return value from last i/o */
81 static int io_ok
; /* i/o worked on volume after resync */
82 static int did_io
; /* did i/o ever occur on volume? */
83 static int done
; /* set via tty termination */
84 static struct stat arsb
; /* stat of archive device at open */
85 static int invld_rec
; /* tape has out of spec record size */
86 static int wr_trail
= 1; /* trailer was rewritten in append */
87 static int can_unlnk
= 0; /* do we unlink null archives? */
88 char *arcname
; /* printable name of archive */
89 char *gzip_program
; /* name of gzip program */
91 static int get_phys
__P((void));
92 extern sigset_t s_mask
;
93 static void ar_start_gzip
__P((int));
97 * Opens the next archive volume. Determines the type of the device and
98 * sets up block sizes as required by the archive device and the format.
99 * Note: we may be called with name == NULL on the first open only.
101 * -1 on failure, 0 otherwise
118 can_unlnk
= did_io
= io_ok
= invld_rec
= 0;
123 * open based on overall operation mode
131 } else if ((arfd
= open(name
, EXT_MODE
, DMOD
)) < 0)
132 syswarn(0, errno
, "Failed open to read on %s", name
);
138 arfd
= STDOUT_FILENO
;
140 } else if ((arfd
= open(name
, AR_MODE
, DMOD
)) < 0)
141 syswarn(0, errno
, "Failed open to write on %s", name
);
149 err(1, "can not gzip while appending");
151 arfd
= STDOUT_FILENO
;
153 } else if ((arfd
= open(name
, APP_MODE
, DMOD
)) < 0)
154 syswarn(0, errno
, "Failed open to read/write on %s",
159 * arfd not used in COPY mode
169 if (chdir(chdname
) != 0)
170 syswarn(1, errno
, "Failed chdir to %s", chdname
);
172 * set up is based on device type
174 if (fstat(arfd
, &arsb
) < 0) {
175 syswarn(0, errno
, "Failed stat on %s", arcname
);
181 if (S_ISDIR(arsb
.st_mode
)) {
182 paxwarn(0, "Cannot write an archive on top of a directory %s",
190 if (S_ISCHR(arsb
.st_mode
))
191 artyp
= ioctl(arfd
, MTIOCGET
, &mb
) ? ISCHR
: ISTAPE
;
192 else if (S_ISBLK(arsb
.st_mode
))
194 else if ((lseek(arfd
, (off_t
)0L, SEEK_CUR
) == -1) && (errno
== ESPIPE
))
200 * make sure we beyond any doubt that we only can unlink regular files
206 * if we are writing, we are done
208 if (act
== ARCHIVE
) {
209 blksz
= rdblksz
= wrblksz
;
215 * set default blksz on read. APPNDs writes rdblksz on the last volume
216 * On all new archive volumes, we shift to wrblksz (if the user
217 * specified one, otherwize we will continue to use rdblksz). We
218 * must to set blocksize based on what kind of device the archive is
224 * Tape drives come in at least two flavors. Those that support
225 * variable sized records and those that have fixed sized
226 * records. They must be treated differently. For tape drives
227 * that support variable sized records, we must make large
228 * reads to make sure we get the entire record, otherwise we
229 * will just get the first part of the record (up to size we
230 * asked). Tapes with fixed sized records may or may not return
231 * multiple records in a single read. We really do not care
232 * what the physical record size is UNLESS we are going to
233 * append. (We will need the physical block size to rewrite
234 * the trailer). Only when we are appending do we go to the
235 * effort to figure out the true PHYSICAL record size.
237 blksz
= rdblksz
= MAXBLK
;
243 * Blocksize is not a major issue with these devices (but must
244 * be kept a multiple of 512). If the user specified a write
245 * block size, we use that to read. Under append, we must
246 * always keep blksz == rdblksz. Otherwise we go ahead and use
247 * the device optimal blocksize as (and if) returned by stat
248 * and if it is within pax specs.
250 if ((act
== APPND
) && wrblksz
) {
251 blksz
= rdblksz
= wrblksz
;
255 if ((arsb
.st_blksize
> 0) && (arsb
.st_blksize
< MAXBLK
) &&
256 ((arsb
.st_blksize
% BLKMULT
) == 0))
257 rdblksz
= arsb
.st_blksize
;
261 * For performance go for large reads when we can without harm
263 if ((act
== APPND
) || (artyp
== ISCHR
))
270 * if the user specified wrblksz works, use it. Under appends
271 * we must always keep blksz == rdblksz
273 if ((act
== APPND
) && wrblksz
&& ((arsb
.st_size
%wrblksz
)==0)){
274 blksz
= rdblksz
= wrblksz
;
278 * See if we can find the blocking factor from the file size
280 for (rdblksz
= MAXBLK
; rdblksz
> 0; rdblksz
-= BLKMULT
)
281 if ((arsb
.st_size
% rdblksz
) == 0)
284 * When we cannont find a match, we may have a flawed archive.
289 * for performance go for large reads when we can
298 * should never happen, worse case, slow...
300 blksz
= rdblksz
= BLKMULT
;
309 * closes archive device, increments volume number, and prints i/o summary
322 did_io
= io_ok
= flcnt
= 0;
332 * Close archive file. This may take a LONG while on tapes (we may be
333 * forced to wait for the rewind to complete) so tell the user what is
334 * going on (this avoids the user hitting control-c thinking pax is
337 if (vflag
&& (artyp
== ISTAPE
)) {
339 (void)putc('\n', outf
);
341 "%s: Waiting for tape drive close to complete...",
347 * if nothing was written to the archive (and we created it), we remove
350 if (can_unlnk
&& (fstat(arfd
, &arsb
) == 0) && (S_ISREG(arsb
.st_mode
)) &&
351 (arsb
.st_size
== 0)) {
352 (void)unlink(arcname
);
358 if (vflag
&& (artyp
== ISTAPE
)) {
359 (void)fputs("done.\n", outf
);
365 if (!io_ok
&& !did_io
) {
372 * The volume number is only increased when the last device has data
373 * and we have already determined the archive format.
384 * Print out a summary of I/O for this archive volume.
387 (void)putc('\n', outf
);
392 * If we have not determined the format yet, we just say how many bytes
393 * we have skipped over looking for a header to id. there is no way we
394 * could have written anything yet.
398 (void)fprintf(outf
, "%s: unknown format, %lu bytes skipped.\n",
400 (void)fprintf(outf
, "%s: unknown format, %qu bytes skipped.\n",
408 if (strcmp(NM_CPIO
, argv0
) == 0)
409 (void)fprintf(outf
, "%qu blocks\n", (rdcnt ? rdcnt
: wrcnt
) / 5120);
410 else if (strcmp(NM_TAR
, argv0
) != 0)
413 "%s: %s vol %d, %lu files, %lu bytes read, %lu bytes written.\n",
415 "%s: %s vol %d, %lu files, %qu bytes read, %qu bytes written.\n",
417 argv0
, frmt
->name
, arvol
-1, flcnt
, rdcnt
, wrcnt
);
424 * drain any archive format independent padding from an archive read
425 * from a socket or a pipe. This is to prevent the process on the
426 * other side of the pipe from getting a SIGPIPE (pax will stop
427 * reading an archive once a format dependent trailer is detected).
441 * we only drain from a pipe/socket. Other devices can be closed
442 * without reading up to end of file. We sure hope that pipe is closed
443 * on the other side so we will get an EOF.
445 if ((artyp
!= ISPIPE
) || (lstrval
<= 0))
449 * keep reading until pipe is drained
451 while ((res
= read(arfd
, drbuf
, sizeof(drbuf
))) > 0)
458 * Set up device right before switching from read to write in an append.
459 * device dependent code (if required) to do this should be added here.
460 * For all archive devices we are already positioned at the place we want
461 * to start writing when this routine is called.
463 * 0 if all ready to write, -1 otherwise
477 * we must make sure the trailer is rewritten on append, ar_next()
478 * will stop us if the archive containing the trailer was not written
483 * Add any device dependent code as required here
488 * Ok we have an archive in a regular file. If we were rewriting a
489 * file, we must get rid of all the stuff after the current offset
490 * (it was not written by pax).
492 if (((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) < 0) ||
493 (ftruncate(arfd
, cpos
) < 0)) {
494 syswarn(1, errno
, "Unable to truncate archive file");
502 * check if the last volume in the archive allows appends. We cannot check
503 * this until we are ready to write since there is no spec that says all
504 * volumes in a single archive have to be of the same type...
506 * 0 if we can append, -1 otherwise.
517 if (artyp
== ISPIPE
) {
518 paxwarn(1, "Cannot append to an archive obtained from a pipe.");
524 paxwarn(1,"Cannot append, device record size %d does not support %s spec",
531 * read up to a specified number of bytes from the archive into the
532 * supplied buffer. When dealing with tapes we may not always be able to
535 * Number of bytes in buffer. 0 for end of file, -1 for a read error.
540 ar_read(register char *buf
, register int cnt
)
548 register int res
= 0;
551 * if last i/o was in error, no more reads until reset or new volume
557 * how we read must be based on device type
561 if ((res
= read(arfd
, buf
, cnt
)) > 0) {
563 * CAUTION: tape systems may not always return the same
564 * sized records so we leave blksz == MAXBLK. The
565 * physical record size that a tape drive supports is
566 * very hard to determine in a uniform and portable
570 if (res
!= rdblksz
) {
572 * Record size changed. If this is happens on
573 * any record after the first, we probably have
574 * a tape drive which has a fixed record size
575 * we are getting multiple records in a single
576 * read). Watch out for record blocking that
577 * violates pax spec (must be a multiple of
581 if (rdblksz
% BLKMULT
)
593 * Files are so easy to deal with. These other things cannot
594 * be trusted at all. So when we are dealing with character
595 * devices and pipes we just take what they have ready for us
596 * and return. Trying to do anything else with them runs the
599 if ((res
= read(arfd
, buf
, cnt
)) > 0) {
607 * We are in trouble at this point, something is broken...
611 syswarn(1, errno
, "Failed read on archive volume %d", arvol
);
613 paxwarn(0, "End of archive volume %d reached", arvol
);
619 * Write a specified number of bytes in supplied buffer to the archive
620 * device so it appears as a single "block". Deals with errors and tries
621 * to recover when faced with short writes.
623 * Number of bytes written. 0 indicates end of volume reached and with no
624 * flaws (as best that can be detected). A -1 indicates an unrecoverable
625 * error in the archive occured.
630 ar_write(register char *buf
, register int bsz
)
642 * do not allow pax to create a "bad" archive. Once a write fails on
643 * an archive volume prevent further writes to it.
648 if ((res
= write(arfd
, buf
, bsz
)) == bsz
) {
654 * write broke, see what we can do with it. We try to send any partial
655 * writes that may violate pax spec to the next archive volume.
664 if ((res
> 0) && (res
% BLKMULT
)) {
666 * try to fix up partial writes which are not BLKMULT
667 * in size by forcing the runt record to next archive
670 if ((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) < 0)
673 if (ftruncate(arfd
, cpos
) < 0)
681 * if file is out of space, handle it like a return of 0
683 if ((errno
== ENOSPC
) || (errno
== EFBIG
) || (errno
== EDQUOT
))
691 if (errno
== EACCES
) {
692 paxwarn(0, "Write failed, archive is write protected.");
697 * see if we reached the end of media, if so force a change to
700 if ((errno
== ENOSPC
) || (errno
== EIO
) || (errno
== ENXIO
))
706 * we cannot fix errors to these devices
712 * Better tell the user the bad news...
713 * if this is a block aligned archive format, we may have a bad archive
714 * if the format wants the header to start at a BLKMULT boundry. While
715 * we can deal with the mis-aligned data, it violates spec and other
716 * archive readers will likely fail. if the format is not block
717 * aligned, the user may be lucky (and the archive is ok).
726 * If we were trying to rewrite the trailer and it didn't work, we
727 * must quit right away.
729 if (!wr_trail
&& (res
<= 0)) {
730 paxwarn(1,"Unable to append, trailer re-write failed. Quitting.");
735 paxwarn(0, "End of archive volume %d reached", arvol
);
737 syswarn(1, errno
, "Failed write to archive volume: %d", arvol
);
738 else if (!frmt
->blkalgn
|| ((res
% frmt
->blkalgn
) == 0))
739 paxwarn(0,"WARNING: partial archive write. Archive MAY BE FLAWED");
741 paxwarn(1,"WARNING: partial archive write. Archive IS FLAWED");
747 * Try to move past a bad spot on a flawed archive as needed to continue
748 * I/O. Clears error flags to allow I/O to continue.
750 * 0 when ok to try i/o again, -1 otherwise.
767 * Fail resync attempts at user request (done) or this is going to be
768 * an update/append to a existing archive. if last i/o hit media end,
769 * we need to go to the next volume not try a resync
771 if ((done
> 0) || (lstrval
== 0))
774 if ((act
== APPND
) || (act
== ARCHIVE
)) {
775 paxwarn(1, "Cannot allow updates to an archive with flaws.");
784 * if the last i/o was a successful data transfer, we assume
785 * the fault is just a bad record on the tape that we are now
786 * past. If we did not get any data since the last resync try
787 * to move the tape foward one PHYSICAL record past any
788 * damaged tape section. Some tape drives are stubborn and need
798 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0)
806 * try to step over the bad part of the device.
809 if (((fsbz
= arsb
.st_blksize
) <= 0) || (artyp
!= ISREG
))
811 if ((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) < 0)
813 mpos
= fsbz
- (cpos
% (off_t
)fsbz
);
814 if (lseek(arfd
, mpos
, SEEK_CUR
) < 0)
821 * cannot recover on these archive device types
827 paxwarn(1, "Unable to recover from an archive read failure.");
830 paxwarn(0, "Attempting to recover from an archive read failure.");
836 * Move the I/O position within the archive foward the specified number of
837 * bytes as supported by the device. If we cannot move the requested
838 * number of bytes, return the actual number of bytes moved in skipped.
840 * 0 if moved the requested distance, -1 on complete failure, 1 on
841 * partial move (the amount moved is in skipped)
846 ar_fow(off_t sksz
, off_t
*skipped
)
849 ar_fow(sksz
, skipped
)
862 * we cannot move foward at EOF or error
868 * Safer to read forward on devices where it is hard to find the end of
869 * the media without reading to it. With tapes we cannot be sure of the
870 * number of physical blocks to skip (we do not know physical block
871 * size at this point), so we must only read foward on tapes!
877 * figure out where we are in the archive
879 if ((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) >= 0) {
881 * we can be asked to move farther than there are bytes in this
882 * volume, if so, just go to file end and let normal buf_fill()
883 * deal with the end of file (it will go to next volume by
886 if ((mpos
= cpos
+ sksz
) > arsb
.st_size
) {
887 *skipped
= arsb
.st_size
- cpos
;
891 if (lseek(arfd
, mpos
, SEEK_SET
) >= 0)
894 syswarn(1, errno
, "Foward positioning operation on archive failed");
901 * move the i/o position within the archive backwards the specified byte
902 * count as supported by the device. With tapes drives we RESET rdblksz to
903 * the PHYSICAL blocksize.
904 * NOTE: We should only be called to move backwards so we can rewrite the
905 * last records (the trailer) of an archive (APPEND).
907 * 0 if moved the requested distance, -1 on complete failure
924 * make sure we do not have try to reverse on a flawed archive
934 * cannot go backwards on these critters
936 paxwarn(1, "Reverse positioning on pipes is not supported.");
947 * For things other than files, backwards movement has a very
948 * high probability of failure as we really do not know the
949 * true attributes of the device we are talking to (the device
950 * may not even have the ability to lseek() in any direction).
951 * First we figure out where we are in the archive.
953 if ((cpos
= lseek(arfd
, (off_t
)0L, SEEK_CUR
)) < 0) {
955 "Unable to obtain current archive byte offset");
961 * we may try to go backwards past the start when the archive
962 * is only a single record. If this hapens and we are on a
963 * multi volume archive, we need to go to the end of the
964 * previous volume and continue our movement backwards from
967 if ((cpos
-= sksz
) < (off_t
)0L) {
970 * this should never happen
972 paxwarn(1,"Reverse position on previous volume.");
978 if (lseek(arfd
, cpos
, SEEK_SET
) < 0) {
979 syswarn(1, errno
, "Unable to seek archive backwards");
986 * Calculate and move the proper number of PHYSICAL tape
987 * blocks. If the sksz is not an even multiple of the physical
988 * tape size, we cannot do the move (this should never happen).
989 * (We also cannot handler trailers spread over two vols).
990 * get_phys() also makes sure we are in front of the filemark.
992 if ((phyblk
= get_phys()) <= 0) {
998 * make sure future tape reads only go by physical tape block
999 * size (set rdblksz to the real size).
1004 * if no movement is required, just return (we must be after
1005 * get_phys() so the physical blocksize is properly set)
1011 * ok we have to move. Make sure the tape drive can do it.
1013 if (sksz
% phyblk
) {
1015 "Tape drive unable to backspace requested amount");
1021 * move backwards the requested number of bytes
1024 mb
.mt_count
= sksz
/phyblk
;
1025 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1026 syswarn(1,errno
, "Unable to backspace tape %d blocks.",
1039 * Determine the physical block size on a tape drive. We need the physical
1040 * block size so we know how many bytes we skip over when we move with
1041 * mtio commands. We also make sure we are BEFORE THE TAPE FILEMARK when
1043 * This is one really SLOW routine...
1045 * physical block size if ok (ok > 0), -1 otherwise
1056 register int padsz
= 0;
1058 register int phyblk
;
1063 * move to the file mark, and then back up one record and read it.
1064 * this should tell us the physical record size the tape is using.
1068 * we know we are at file mark when we get back a 0 from
1071 while ((res
= read(arfd
, scbuf
, sizeof(scbuf
))) > 0)
1074 syswarn(1, errno
, "Unable to locate tape filemark.");
1080 * move backwards over the file mark so we are at the end of the
1085 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1086 syswarn(1, errno
, "Unable to backspace over tape filemark.");
1091 * move backwards so we are in front of the last record and read it to
1092 * get physical tape blocksize.
1096 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1097 syswarn(1, errno
, "Unable to backspace over last tape block.");
1100 if ((phyblk
= read(arfd
, scbuf
, sizeof(scbuf
))) <= 0) {
1101 syswarn(1, errno
, "Cannot determine archive tape blocksize.");
1106 * read foward to the file mark, then back up in front of the filemark
1107 * (this is a bit paranoid, but should be safe to do).
1109 while ((res
= read(arfd
, scbuf
, sizeof(scbuf
))) > 0)
1112 syswarn(1, errno
, "Unable to locate tape filemark.");
1117 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1118 syswarn(1, errno
, "Unable to backspace over tape filemark.");
1123 * set lstrval so we know that the filemark has not been seen
1128 * return if there was no padding
1134 * make sure we can move backwards over the padding. (this should
1137 if (padsz
% phyblk
) {
1138 paxwarn(1, "Tape drive unable to backspace requested amount");
1143 * move backwards over the padding so the head is where it was when
1144 * we were first called (if required).
1147 mb
.mt_count
= padsz
/phyblk
;
1148 if (ioctl(arfd
, MTIOCTOP
, &mb
) < 0) {
1149 syswarn(1,errno
,"Unable to backspace tape over %d pad blocks",
1158 * prompts the user for the next volume in this archive. For some devices
1159 * we may allow the media to be changed. Otherwise a new archive is
1160 * prompted for. By pax spec, if there is no controlling tty or an eof is
1161 * read on tty input, we must quit pax.
1163 * 0 when ready to continue, -1 when all done
1174 char buf
[PAXPATHLEN
+2];
1175 static int freeit
= 0;
1179 * WE MUST CLOSE THE DEVICE. A lot of devices must see last close, (so
1180 * things like writing EOF etc will be done) (Watch out ar_close() can
1181 * also be called via a signal handler, so we must prevent a race.
1183 if (sigprocmask(SIG_BLOCK
, &s_mask
, &o_mask
) < 0)
1184 syswarn(0, errno
, "Unable to set signal mask");
1186 if (sigprocmask(SIG_SETMASK
, &o_mask
, NULL
) < 0)
1187 syswarn(0, errno
, "Unable to restore signal mask");
1189 if (done
|| !wr_trail
|| strcmp(NM_TAR
, argv0
) == 0)
1192 tty_prnt("\nATTENTION! %s archive volume change required.\n", argv0
);
1195 * if i/o is on stdin or stdout, we cannot reopen it (we do not know
1196 * the name), the user will be forced to type it in.
1198 if (strcmp(arcname
, STDO
) && strcmp(arcname
, STDN
) && (artyp
!= ISREG
)
1199 && (artyp
!= ISPIPE
)) {
1200 if (artyp
== ISTAPE
) {
1201 tty_prnt("%s ready for archive tape volume: %d\n",
1203 tty_prnt("Load the NEXT TAPE on the tape drive");
1205 tty_prnt("%s ready for archive volume: %d\n",
1207 tty_prnt("Load the NEXT STORAGE MEDIA (if required)");
1210 if ((act
== ARCHIVE
) || (act
== APPND
))
1211 tty_prnt(" and make sure it is WRITE ENABLED.\n");
1216 tty_prnt("Type \"y\" to continue, \".\" to quit %s,",
1218 tty_prnt(" or \"s\" to switch to new device.\nIf you");
1219 tty_prnt(" cannot change storage media, type \"s\"\n");
1220 tty_prnt("Is the device ready and online? > ");
1222 if ((tty_read(buf
,sizeof(buf
))<0) || !strcmp(buf
,".")){
1225 tty_prnt("Quitting %s!\n", argv0
);
1230 if ((buf
[0] == '\0') || (buf
[1] != '\0')) {
1231 tty_prnt("%s unknown command, try again\n",buf
);
1239 * we are to continue with the same device
1241 if (ar_open(arcname
) >= 0)
1243 tty_prnt("Cannot re-open %s, try again\n",
1249 * user wants to open a different device
1251 tty_prnt("Switching to a different archive\n");
1254 tty_prnt("%s unknown command, try again\n",buf
);
1260 tty_prnt("Ready for archive volume: %d\n", arvol
);
1263 * have to go to a different archive
1266 tty_prnt("Input archive name or \".\" to quit %s.\n", argv0
);
1267 tty_prnt("Archive name > ");
1269 if ((tty_read(buf
, sizeof(buf
)) < 0) || !strcmp(buf
, ".")) {
1272 tty_prnt("Quitting %s!\n", argv0
);
1276 if (buf
[0] == '\0') {
1277 tty_prnt("Empty file name, try again\n");
1280 if (!strcmp(buf
, "..")) {
1281 tty_prnt("Illegal file name: .. try again\n");
1284 if (strlen(buf
) > PAXPATHLEN
) {
1285 tty_prnt("File name too long, try again\n");
1290 * try to open new archive
1292 if (ar_open(buf
) >= 0) {
1294 (void)free(arcname
);
1297 if ((arcname
= strdup(buf
)) == NULL
) {
1300 paxwarn(0, "Cannot save archive name.");
1306 tty_prnt("Cannot open %s, try again\n", buf
);
1314 * starts the gzip compression/decompression process as a child, using magic
1315 * to keep the fd the same in the calling function (parent).
1319 ar_start_gzip(int fd
)
1327 char *gzip_flags
=NULL
;
1330 err(1, "could not pipe");
1333 err(1, "could not fork");
1346 errx(1, "ar_start_gzip: impossible");
1353 dup2(fds
[0], STDIN_FILENO
);
1354 dup2(fd
, STDOUT_FILENO
);
1359 dup2(fds
[1], STDOUT_FILENO
);
1360 dup2(fd
, STDIN_FILENO
);
1364 errx(1, "ar_start_gzip: impossible");
1368 if (execlp(gzip_program
, gzip_program
, gzip_flags
, NULL
) < 0)
1369 err(1, "could not exec");