| ar_io.c (c9a8d1f4ddce0e113129507ab55689b6e922f60d) | ar_io.c (46be34b90213ebd9037cb2c24aec0009d7f2f5c1) |
|---|---|
| 1/*- 2 * Copyright (c) 1992 Keith Muller. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Keith Muller of the University of California, San Diego. 8 * --- 26 unchanged lines hidden (view full) --- 35 * SUCH DAMAGE. 36 */ 37 38#ifndef lint 39#if 0 40static char sccsid[] = "@(#)ar_io.c 8.2 (Berkeley) 4/18/94"; 41#endif 42static const char rcsid[] = | 1/*- 2 * Copyright (c) 1992 Keith Muller. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Keith Muller of the University of California, San Diego. 8 * --- 26 unchanged lines hidden (view full) --- 35 * SUCH DAMAGE. 36 */ 37 38#ifndef lint 39#if 0 40static char sccsid[] = "@(#)ar_io.c 8.2 (Berkeley) 4/18/94"; 41#endif 42static const char rcsid[] = |
| 43 "$Id$"; | 43 "$Id: ar_io.c,v 1.10 1998/05/15 06:27:34 charnier Exp $"; |
| 44#endif /* not lint */ 45 46#include <sys/types.h> 47#include <sys/stat.h> 48#include <sys/ioctl.h> 49#include <sys/mtio.h> 50#include <signal.h> 51#include <string.h> --- 8 unchanged lines hidden (view full) --- 60/* 61 * Routines which deal directly with the archive I/O device/file. 62 */ 63 64#define DMOD 0666 /* default mode of created archives */ 65#define EXT_MODE O_RDONLY /* open mode for list/extract */ 66#define AR_MODE (O_WRONLY | O_CREAT | O_TRUNC) /* mode for archive */ 67#define APP_MODE O_RDWR /* mode for append */ | 44#endif /* not lint */ 45 46#include <sys/types.h> 47#include <sys/stat.h> 48#include <sys/ioctl.h> 49#include <sys/mtio.h> 50#include <signal.h> 51#include <string.h> --- 8 unchanged lines hidden (view full) --- 60/* 61 * Routines which deal directly with the archive I/O device/file. 62 */ 63 64#define DMOD 0666 /* default mode of created archives */ 65#define EXT_MODE O_RDONLY /* open mode for list/extract */ 66#define AR_MODE (O_WRONLY | O_CREAT | O_TRUNC) /* mode for archive */ 67#define APP_MODE O_RDWR /* mode for append */ |
| 68#define STDO "<STDOUT>" /* psuedo name for stdout */ 69#define STDN "<STDIN>" /* psuedo name for stdin */ | 68#define STDO "<STDOUT>" /* pseudo name for stdout */ 69#define STDN "<STDIN>" /* pseudo name for stdin */ |
| 70static int arfd = -1; /* archive file descriptor */ 71static int artyp = ISREG; /* archive type: file/FIFO/tape */ 72static int arvol = 1; /* archive volume number */ 73static int lstrval = -1; /* return value from last i/o */ 74static int io_ok; /* i/o worked on volume after resync */ 75static int did_io; /* did i/o ever occur on volume? */ 76static int done; /* set via tty termination */ 77static struct stat arsb; /* stat of archive device at open */ --- 180 unchanged lines hidden (view full) --- 258 } 259 /* 260 * See if we can find the blocking factor from the file size 261 */ 262 for (rdblksz = MAXBLK; rdblksz > 0; rdblksz -= BLKMULT) 263 if ((arsb.st_size % rdblksz) == 0) 264 break; 265 /* | 70static int arfd = -1; /* archive file descriptor */ 71static int artyp = ISREG; /* archive type: file/FIFO/tape */ 72static int arvol = 1; /* archive volume number */ 73static int lstrval = -1; /* return value from last i/o */ 74static int io_ok; /* i/o worked on volume after resync */ 75static int did_io; /* did i/o ever occur on volume? */ 76static int done; /* set via tty termination */ 77static struct stat arsb; /* stat of archive device at open */ --- 180 unchanged lines hidden (view full) --- 258 } 259 /* 260 * See if we can find the blocking factor from the file size 261 */ 262 for (rdblksz = MAXBLK; rdblksz > 0; rdblksz -= BLKMULT) 263 if ((arsb.st_size % rdblksz) == 0) 264 break; 265 /* |
| 266 * When we cannont find a match, we may have a flawed archive. | 266 * When we cannot find a match, we may have a flawed archive. |
| 267 */ 268 if (rdblksz <= 0) 269 rdblksz = FILEBLK; 270 /* 271 * for performance go for large reads when we can 272 */ 273 if (act == APPND) 274 blksz = rdblksz; --- 410 unchanged lines hidden (view full) --- 685 * we cannot fix errors to these devices 686 */ 687 break; 688 } 689 690 /* 691 * Better tell the user the bad news... 692 * if this is a block aligned archive format, we may have a bad archive | 267 */ 268 if (rdblksz <= 0) 269 rdblksz = FILEBLK; 270 /* 271 * for performance go for large reads when we can 272 */ 273 if (act == APPND) 274 blksz = rdblksz; --- 410 unchanged lines hidden (view full) --- 685 * we cannot fix errors to these devices 686 */ 687 break; 688 } 689 690 /* 691 * Better tell the user the bad news... 692 * if this is a block aligned archive format, we may have a bad archive |
| 693 * if the format wants the header to start at a BLKMULT boundry. While | 693 * if the format wants the header to start at a BLKMULT boundary. While |
| 694 * we can deal with the mis-aligned data, it violates spec and other 695 * archive readers will likely fail. if the format is not block 696 * aligned, the user may be lucky (and the archive is ok). 697 */ 698 if (res >= 0) { 699 if (res > 0) 700 wr_trail = 1; 701 io_ok = 1; --- 56 unchanged lines hidden (view full) --- 758 did_io = 1; 759 760 switch(artyp) { 761 case ISTAPE: 762 /* 763 * if the last i/o was a successful data transfer, we assume 764 * the fault is just a bad record on the tape that we are now 765 * past. If we did not get any data since the last resync try | 694 * we can deal with the mis-aligned data, it violates spec and other 695 * archive readers will likely fail. if the format is not block 696 * aligned, the user may be lucky (and the archive is ok). 697 */ 698 if (res >= 0) { 699 if (res > 0) 700 wr_trail = 1; 701 io_ok = 1; --- 56 unchanged lines hidden (view full) --- 758 did_io = 1; 759 760 switch(artyp) { 761 case ISTAPE: 762 /* 763 * if the last i/o was a successful data transfer, we assume 764 * the fault is just a bad record on the tape that we are now 765 * past. If we did not get any data since the last resync try |
| 766 * to move the tape foward one PHYSICAL record past any | 766 * to move the tape forward one PHYSICAL record past any |
| 767 * damaged tape section. Some tape drives are stubborn and need 768 * to be pushed. 769 */ 770 if (io_ok) { 771 io_ok = 0; 772 lstrval = 1; 773 break; 774 } --- 90 unchanged lines hidden (view full) --- 865 if ((mpos = cpos + sksz) > arsb.st_size) { 866 *skipped = arsb.st_size - cpos; 867 mpos = arsb.st_size; 868 } else 869 *skipped = sksz; 870 if (lseek(arfd, mpos, SEEK_SET) >= 0) 871 return(0); 872 } | 767 * damaged tape section. Some tape drives are stubborn and need 768 * to be pushed. 769 */ 770 if (io_ok) { 771 io_ok = 0; 772 lstrval = 1; 773 break; 774 } --- 90 unchanged lines hidden (view full) --- 865 if ((mpos = cpos + sksz) > arsb.st_size) { 866 *skipped = arsb.st_size - cpos; 867 mpos = arsb.st_size; 868 } else 869 *skipped = sksz; 870 if (lseek(arfd, mpos, SEEK_SET) >= 0) 871 return(0); 872 } |
| 873 sys_warn(1, errno, "Foward positioning operation on archive failed"); | 873 sys_warn(1, errno, "Forward positioning operation on archive failed"); |
| 874 lstrval = -1; 875 return(-1); 876} 877 878/* 879 * ar_rev() 880 * move the i/o position within the archive backwards the specified byte 881 * count as supported by the device. With tapes drives we RESET rdblksz to --- 408 unchanged lines hidden --- | 874 lstrval = -1; 875 return(-1); 876} 877 878/* 879 * ar_rev() 880 * move the i/o position within the archive backwards the specified byte 881 * count as supported by the device. With tapes drives we RESET rdblksz to --- 408 unchanged lines hidden --- |