/* Buffer management for tar.
- Copyright (C) 1988, 1992 Free Software Foundation
-
-This file is part of GNU Tar.
-
-GNU Tar is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Tar is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Tar; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/*
- * Buffer management for tar.
- *
- * Written by John Gilmore, ihnp4!hoptoad!gnu, on 25 August 1985.
- */
-
-#include <stdio.h>
-#include <errno.h>
-#ifndef STDC_HEADERS
-extern int errno;
-#endif
-#include <sys/types.h> /* For non-Berkeley systems */
-#include <signal.h>
-#include <time.h>
-time_t time();
-#ifdef HAVE_SYS_MTIO_H
-#include <sys/ioctl.h>
-#include <sys/mtio.h>
-#endif
+ Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1999, 2000, 2001,
+ 2003, 2004, 2005 Free Software Foundation, Inc.
-#ifdef BSD42
-#include <sys/file.h>
-#else
-#ifndef V7
-#include <fcntl.h>
-#endif
-#endif
+ Written by John Gilmore, on 1985-08-25.
-#ifdef __MSDOS__
-#include <process.h>
-#endif
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any later
+ version.
-#ifdef XENIX
-#include <sys/inode.h>
-#endif
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ Public License for more details.
-#include "tar.h"
-#include "port.h"
-#include "rmt.h"
-#include "regex.h"
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-/* Either stdout or stderr: The thing we write messages (standard msgs, not
- errors) to. Stdout unless we're writing a pipe, in which case stderr */
-FILE *msg_file = stdout;
+#include <system.h>
-#define STDIN 0 /* Standard input file descriptor */
-#define STDOUT 1 /* Standard output file descriptor */
+#include <signal.h>
-#define PREAD 0 /* Read file descriptor from pipe() */
-#define PWRITE 1 /* Write file descriptor from pipe() */
+#include <fnmatch.h>
+#include <human.h>
+#include <quotearg.h>
-#define MAGIC_STAT 105 /* Magic status returned by child, if
- it can't exec. We hope compress/sh
- never return this status! */
+#include "common.h"
+#include <rmt.h>
-void *valloc();
+/* Number of retries before giving up on read. */
+#define READ_ERROR_MAX 10
-void writeerror();
-void readerror();
+/* Globbing pattern to append to volume label if initial match failed. */
+#define VOLUME_LABEL_APPEND " Volume [1-9]*"
+\f
+/* Variables. */
-void ck_pipe();
-void ck_close();
+static tarlong prev_written; /* bytes written on previous volumes */
+static tarlong bytes_written; /* bytes written on this volume */
+static void *record_buffer; /* allocated memory */
-int backspace_output();
-extern void finish_header();
-void flush_archive();
-int isfile();
-int new_volume();
-void verify_volume();
-extern void to_oct();
+/* FIXME: The following variables should ideally be static to this
+ module. However, this cannot be done yet. The cleanup continues! */
-#ifndef __MSDOS__
-/* Obnoxious test to see if dimwit is trying to dump the archive */
-dev_t ar_dev;
-ino_t ar_ino;
-#endif
+union block *record_start; /* start of record of archive */
+union block *record_end; /* last+1 block of archive record */
+union block *current_block; /* current block of archive */
+enum access_mode access_mode; /* how do we handle the archive */
+off_t records_read; /* number of records read from this archive */
+off_t records_written; /* likewise, for records written */
-/*
- * The record pointed to by save_rec should not be overlaid
- * when reading in a new tape block. Copy it to record_save_area first, and
- * change the pointer in *save_rec to point to record_save_area.
- * Saved_recno records the record number at the time of the save.
- * This is used by annofile() to print the record number of a file's
- * header record.
- */
-static union record **save_rec;
- union record record_save_area;
-static long saved_recno;
-
-/*
- * PID of child program, if f_compress or remote archive access.
- */
-static int childpid = 0;
-
-/*
- * Record number of the start of this block of records
- */
-long baserec;
-
-/*
- * Error recovery stuff
- */
-static int r_error_count;
-
-/*
- * Have we hit EOF yet?
- */
-static int hit_eof;
+static off_t record_start_block; /* block ordinal at record_start */
-/* Checkpointing counter */
-static int checkpoint;
+/* Where we write list messages (not errors, not interactions) to. */
+FILE *stdlis;
-/* JF we're reading, but we just read the last record and its time to update */
-extern time_to_start_writing;
-int file_to_switch_to= -1; /* If remote update, close archive, and use
- this descriptor to write to */
+static void backspace_output (void);
+static bool new_volume (enum access_mode);
-static int volno = 1; /* JF which volume of a multi-volume tape
- we're on */
-static int global_volno = 1; /* Volume number to print in external messages. */
+/* PID of child program, if compress_option or remote archive access. */
+static pid_t child_pid;
-char *save_name = 0; /* Name of the file we are currently writing */
-long save_totsize; /* total size of file we are writing. Only
- valid if save_name is non_zero */
-long save_sizeleft; /* Where we are in the file we are writing.
- Only valid if save_name is non-zero */
+/* Error recovery stuff */
+static int read_error_count;
-int write_archive_to_stdout;
+/* Have we hit EOF yet? */
+static bool hit_eof;
-/* Used by fl_read and fl_write to store the real info about saved names */
-static char real_s_name[NAMSIZ];
-static long real_s_totsize;
-static long real_s_sizeleft;
+/* Checkpointing counter */
+static int checkpoint;
-/* Reset the EOF flag (if set), and re-set ar_record, etc */
+static bool read_full_records = false;
+
+/* We're reading, but we just read the last block and it's time to update.
+ Declared in update.c
+
+ As least EXTERN like this one as possible. (?? --gray)
+ FIXME: Either eliminate it or move it to common.h.
+*/
+extern bool time_to_start_writing;
+
+static int volno = 1; /* which volume of a multi-volume tape we're
+ on */
+static int global_volno = 1; /* volume number to print in external
+ messages */
+
+/* The pointer save_name, which is set in function dump_file() of module
+ create.c, points to the original long filename instead of the new,
+ shorter mangled name that is set in start_header() of module create.c.
+ The pointer save_name is only used in multi-volume mode when the file
+ being processed is non-sparse; if a file is split between volumes, the
+ save_name is used in generating the LF_MULTIVOL record on the second
+ volume. (From Pierce Cantrell, 1991-08-13.) */
+
+char *save_name; /* name of the file we are currently writing */
+off_t save_totsize; /* total size of file we are writing, only
+ valid if save_name is nonzero */
+off_t save_sizeleft; /* where we are in the file we are writing,
+ only valid if save_name is nonzero */
+
+bool write_archive_to_stdout;
+
+/* Used by flush_read and flush_write to store the real info about saved
+ names. */
+static char *real_s_name;
+static off_t real_s_totsize;
+static off_t real_s_sizeleft;
+\f
+/* Functions. */
void
-reset_eof()
+clear_read_error_count (void)
{
- if(hit_eof) {
- hit_eof=0;
- ar_record=ar_block;
- ar_last=ar_block+blocking;
- ar_reading=0;
- }
+ read_error_count = 0;
}
-/*
- * Return the location of the next available input or output record.
- * Return NULL for EOF. Once we have returned NULL, we just keep returning
- * it, to avoid accidentally going on to the next file on the "tape".
- */
-union record *
-findrec()
-{
- if (ar_record == ar_last) {
- if (hit_eof)
- return (union record *)NULL; /* EOF */
- flush_archive();
- if (ar_record == ar_last) {
- hit_eof++;
- return (union record *)NULL; /* EOF */
- }
- }
- return ar_record;
-}
+\f
+/* Time-related functions */
+double duration;
-/*
- * Indicate that we have used all records up thru the argument.
- * (should the arg have an off-by-1? XXX FIXME)
- */
void
-userec(rec)
- union record *rec;
+set_start_time ()
{
- while(rec >= ar_record)
- ar_record++;
- /*
- * Do NOT flush the archive here. If we do, the same
- * argument to userec() could mean the next record (if the
- * input block is exactly one record long), which is not what
- * is intended.
- */
- if (ar_record > ar_last)
- abort();
+ gettime (&start_time);
}
-
-/*
- * Return a pointer to the end of the current records buffer.
- * All the space between findrec() and endofrecs() is available
- * for filling with data, or taking data from.
- */
-union record *
-endofrecs()
+void
+compute_duration ()
{
- return ar_last;
+ struct timespec now;
+ gettime (&now);
+ duration += ((now.tv_sec - start_time.tv_sec)
+ + (now.tv_nsec - start_time.tv_nsec) / 1e9);
+ set_start_time ();
}
+\f
+/* Compression detection */
-/*
- * Duplicate a file descriptor into a certain slot.
- * Equivalent to BSD "dup2" with error reporting.
- */
-void
-dupto(from, to, msg)
- int from, to;
- char *msg;
+enum compress_type {
+ ct_none,
+ ct_compress,
+ ct_gzip,
+ ct_bzip2
+};
+
+struct zip_magic
+{
+ enum compress_type type;
+ size_t length;
+ char *magic;
+ char *program;
+ char *option;
+};
+
+static struct zip_magic const magic[] = {
+ { ct_none, },
+ { ct_compress, 2, "\037\235", "compress", "-Z" },
+ { ct_gzip, 2, "\037\213", "gzip", "-z" },
+ { ct_bzip2, 3, "BZh", "bzip2", "-j" },
+};
+
+#define NMAGIC (sizeof(magic)/sizeof(magic[0]))
+
+#define compress_option(t) magic[t].option
+#define compress_program(t) magic[t].program
+
+/* Check if the file ARCHIVE is a compressed archive. */
+enum compress_type
+check_compressed_archive ()
{
- int err;
+ struct zip_magic const *p;
+ bool sfr;
- if (from != to) {
- err=close(to);
- if(err<0 && errno!=EBADF) {
- msg_perror("Cannot close descriptor %d",to);
- exit(EX_SYSTEM);
- }
- err = dup(from);
- if (err != to) {
- msg_perror("cannot dup %s",msg);
- exit(EX_SYSTEM);
- }
- ck_close(from);
- }
+ /* Prepare global data needed for find_next_block: */
+ record_end = record_start; /* set up for 1st record = # 0 */
+ sfr = read_full_records;
+ read_full_records = true; /* Suppress fatal error on reading a partial
+ record */
+ find_next_block ();
+
+ /* Restore global values */
+ read_full_records = sfr;
+
+ if (tar_checksum (record_start, true) == HEADER_SUCCESS)
+ /* Probably a valid header */
+ return ct_none;
+
+ for (p = magic + 1; p < magic + NMAGIC; p++)
+ if (memcmp (record_start->buffer, p->magic, p->length) == 0)
+ return p->type;
+
+ return ct_none;
}
-#ifdef __MSDOS__
-void
-child_open()
+/* Open an archive named archive_name_array[0]. Detect if it is
+ a compressed archive of known type and use corresponding decompression
+ program if so */
+int
+open_compressed_archive ()
{
- fprintf(stderr,"MS-DOS %s can't use compressed or remote archives\n",tar);
- exit(EX_ARGSBAD);
+ archive = rmtopen (archive_name_array[0], O_RDONLY | O_BINARY,
+ MODE_RW, rsh_command_option);
+ if (archive == -1)
+ return archive;
+
+ if (!multi_volume_option)
+ {
+ enum compress_type type = check_compressed_archive ();
+
+ if (type == ct_none)
+ return archive;
+
+ /* FD is not needed any more */
+ rmtclose (archive);
+
+ hit_eof = false; /* It might have been set by find_next_block in
+ check_compressed_archive */
+
+ /* Open compressed archive */
+ use_compress_program_option = compress_program (type);
+ child_pid = sys_child_open_for_uncompress ();
+ read_full_records = true;
+ }
+
+ records_read = 0;
+ record_end = record_start; /* set up for 1st record = # 0 */
+
+ return archive;
}
-#else
+\f
+
void
-child_open()
+print_total_written (void)
{
- int pipe[2];
- int err = 0;
- int nar;
+ tarlong written = prev_written + bytes_written;
+ char bytes[sizeof (tarlong) * CHAR_BIT];
+ char abbr[LONGEST_HUMAN_READABLE + 1];
+ char rate[LONGEST_HUMAN_READABLE + 1];
- int kidpipe[2];
- int kidchildpid;
+ int human_opts = human_autoscale | human_base_1024 | human_SI | human_B;
-#define READ 0
-#define WRITE 1
+ sprintf (bytes, TARLONG_FORMAT, written);
- ck_pipe(pipe);
+ /* Amanda 2.4.1p1 looks for "Total bytes written: [0-9][0-9]*". */
+ fprintf (stderr, _("Total bytes written: %s (%s, %s/s)\n"), bytes,
+ human_readable (written, abbr, human_opts, 1, 1),
+ (0 < duration && written / duration < (uintmax_t) -1
+ ? human_readable (written / duration, rate, human_opts, 1, 1)
+ : "?"));
+}
- childpid=fork();
- if(childpid<0) {
- msg_perror("cannot fork");
- exit(EX_SYSTEM);
- }
- if(childpid>0) {
- /* We're the parent. Clean up and be happy */
- /* This, at least, is easy */
-
- if(ar_reading) {
- f_reblock++;
- archive=pipe[READ];
- ck_close(pipe[WRITE]);
- } else {
- archive = pipe[WRITE];
- ck_close(pipe[READ]);
- }
- return;
- }
+/* Compute and return the block ordinal at current_block. */
+off_t
+current_block_ordinal (void)
+{
+ return record_start_block + (current_block - record_start);
+}
- /* We're the kid */
- if(ar_reading) {
- dupto(pipe[WRITE],STDOUT,"(child) pipe to stdout");
- ck_close(pipe[READ]);
- } else {
- dupto(pipe[READ],STDIN,"(child) pipe to stdin");
- ck_close(pipe[WRITE]);
- }
+/* If the EOF flag is set, reset it, as well as current_block, etc. */
+void
+reset_eof (void)
+{
+ if (hit_eof)
+ {
+ hit_eof = false;
+ current_block = record_start;
+ record_end = record_start + blocking_factor;
+ access_mode = ACCESS_WRITE;
+ }
+}
- /* We need a child tar only if
- 1: we're reading/writing stdin/out (to force reblocking)
- 2: the file is to be accessed by rmt (compress doesn't know how)
- 3: the file is not a plain file */
-#ifdef NO_REMOTE
- if(!(ar_files[0][0]=='-' && ar_files[0][1]=='\0') && isfile(ar_files[0]))
-#else
- if(!(ar_files[0][0]=='-' && ar_files[0][1]=='\0') && !_remdev(ar_files[0]) && isfile(ar_files[0]))
-#endif
+/* Return the location of the next available input or output block.
+ Return zero for EOF. Once we have returned zero, we just keep returning
+ it, to avoid accidentally going on to the next file on the tape. */
+union block *
+find_next_block (void)
+{
+ if (current_block == record_end)
+ {
+ if (hit_eof)
+ return 0;
+ flush_archive ();
+ if (current_block == record_end)
{
- /* We don't need a child tar. Open the archive */
- if(ar_reading) {
- archive=open(ar_files[0], O_RDONLY|O_BINARY, 0666);
- if(archive<0) {
- msg_perror("can't open archive %s",ar_files[0]);
- exit(EX_BADARCH);
- }
- dupto(archive,STDIN,"archive to stdin");
- /* close(archive); */
- } else {
- archive=creat(ar_files[0],0666);
- if(archive<0) {
- msg_perror("can't open archive %s",ar_files[0]);
- exit(EX_BADARCH);
- }
- dupto(archive,STDOUT,"archive to stdout");
- /* close(archive); */
- }
- } else {
- /* We need a child tar */
- ck_pipe(kidpipe);
-
- kidchildpid=fork();
- if(kidchildpid<0) {
- msg_perror("child can't fork");
- exit(EX_SYSTEM);
- }
-
- if(kidchildpid>0) {
- /* About to exec compress: set up the files */
- if(ar_reading) {
- dupto(kidpipe[READ],STDIN,"((child)) pipe to stdin");
- ck_close(kidpipe[WRITE]);
- /* dup2(pipe[WRITE],STDOUT); */
- } else {
- /* dup2(pipe[READ],STDIN); */
- dupto(kidpipe[WRITE],STDOUT,"((child)) pipe to stdout");
- ck_close(kidpipe[READ]);
- }
- /* ck_close(pipe[READ]); */
- /* ck_close(pipe[WRITE]); */
- /* ck_close(kidpipe[READ]);
- ck_close(kidpipe[WRITE]); */
- } else {
- /* Grandchild. Do the right thing, namely sit here and
- read/write the archive, and feed stuff back to compress */
- tar="tar (child)";
- if(ar_reading) {
- dupto(kidpipe[WRITE],STDOUT,"[child] pipe to stdout");
- ck_close(kidpipe[READ]);
- } else {
- dupto(kidpipe[READ],STDIN,"[child] pipe to stdin");
- ck_close(kidpipe[WRITE]);
- }
-
- if (ar_files[0][0] == '-' && ar_files[0][1] == '\0') {
- if (ar_reading)
- archive = STDIN;
- else
- archive = STDOUT;
- } else /* This can't happen if (ar_reading==2)
- archive = rmtopen(ar_files[0], O_RDWR|O_CREAT|O_BINARY, 0666);
- else */if(ar_reading)
- archive = rmtopen(ar_files[0], O_RDONLY|O_BINARY, 0666);
- else
- archive = rmtcreat(ar_files[0], 0666);
-
- if (archive < 0) {
- msg_perror("can't open archive %s",ar_files[0]);
- exit(EX_BADARCH);
- }
-
- if(ar_reading) {
- for(;;) {
- char *ptr;
- int max,count;
-
- r_error_count = 0;
- error_loop:
- err=rmtread(archive, ar_block->charptr,(int)(blocksize));
- if(err<0) {
- readerror();
- goto error_loop;
- }
- if(err==0)
- break;
- ptr = ar_block->charptr;
- max = err;
- while(max) {
- count = (max<RECORDSIZE) ? max : RECORDSIZE;
- err=write(STDOUT,ptr,count);
- if(err!=count) {
- if(err<0) {
- msg_perror("can't write to compress");
- exit(EX_SYSTEM);
- } else
- msg("write to compress short %d bytes",count-err);
- count = (err<0) ? 0 : err;
- }
- ptr+=count;
- max-=count;
- }
- }
- } else {
- for(;;) {
- int n;
- char *ptr;
-
- n=blocksize;
- ptr = ar_block->charptr;
- while(n) {
- err=read(STDIN,ptr,(n<RECORDSIZE) ? n : RECORDSIZE);
- if(err<=0)
- break;
- n-=err;
- ptr+=err;
- }
- /* EOF */
- if(err==0) {
- if(f_compress<2)
- blocksize-=n;
- else
- bzero(ar_block->charptr+blocksize-n,n);
- err=rmtwrite(archive,ar_block->charptr,blocksize);
- if(err!=(blocksize))
- writeerror(err);
- if(f_compress<2)
- blocksize+=n;
- break;
- }
- if(n) {
- msg_perror("can't read from compress");
- exit(EX_SYSTEM);
- }
- err=rmtwrite(archive, ar_block->charptr, (int)blocksize);
- if(err!=blocksize)
- writeerror(err);
- }
- }
-
- /* close_archive(); */
- exit(0);
- }
+ hit_eof = true;
+ return 0;
}
- /* So we should exec compress (-d) */
- if(ar_reading)
- execlp("compress", "compress", "-d", (char *)0);
- else
- execlp("compress", "compress", (char *)0);
- msg_perror("can't exec compress");
- _exit(EX_SYSTEM);
+ }
+ return current_block;
}
+/* Indicate that we have used all blocks up thru BLOCK. */
+void
+set_next_block_after (union block *block)
+{
+ while (block >= current_block)
+ current_block++;
-/* return non-zero if p is the name of a directory */
-int
-isfile(p)
-char *p;
+ /* Do *not* flush the archive here. If we do, the same argument to
+ set_next_block_after could mean the next block (if the input record
+ is exactly one block long), which is not what is intended. */
+
+ if (current_block > record_end)
+ abort ();
+}
+
+/* Return the number of bytes comprising the space between POINTER
+ through the end of the current buffer of blocks. This space is
+ available for filling with data, or taking data from. POINTER is
+ usually (but not always) the result of previous find_next_block call. */
+size_t
+available_space_after (union block *pointer)
{
- struct stat stbuf;
+ return record_end->buffer - pointer->buffer;
+}
- if(stat(p,&stbuf)<0)
- return 1;
- if(S_ISREG(stbuf.st_mode))
- return 1;
- return 0;
+/* Close file having descriptor FD, and abort if close unsuccessful. */
+void
+xclose (int fd)
+{
+ if (close (fd) != 0)
+ close_error (_("(pipe)"));
}
-#endif
+/* Check the LABEL block against the volume label, seen as a globbing
+ pattern. Return true if the pattern matches. In case of failure,
+ retry matching a volume sequence number before giving up in
+ multi-volume mode. */
+static bool
+check_label_pattern (union block *label)
+{
+ char *string;
+ bool result;
+
+ if (! memchr (label->header.name, '\0', sizeof label->header.name))
+ return false;
-/*
- * Open an archive file. The argument specifies whether we are
- * reading or writing.
- */
-/* JF if the arg is 2, open for reading and writing. */
+ if (fnmatch (volume_label_option, label->header.name, 0) == 0)
+ return true;
+
+ if (!multi_volume_option)
+ return false;
+
+ string = xmalloc (strlen (volume_label_option)
+ + sizeof VOLUME_LABEL_APPEND + 1);
+ strcpy (string, volume_label_option);
+ strcat (string, VOLUME_LABEL_APPEND);
+ result = fnmatch (string, label->header.name, 0) == 0;
+ free (string);
+ return result;
+}
+
+/* Open an archive file. The argument specifies whether we are
+ reading or writing, or both. */
void
-open_archive(reading)
- int reading;
+open_archive (enum access_mode wanted_access)
{
- msg_file = f_exstdout ? stderr : stdout;
+ int backed_up_flag = 0;
- if (blocksize == 0) {
- msg("invalid value for blocksize");
- exit(EX_ARGSBAD);
- }
+ if (index_file_name)
+ {
+ stdlis = fopen (index_file_name, "w");
+ if (! stdlis)
+ open_error (index_file_name);
+ }
+ else
+ stdlis = to_stdout_option ? stderr : stdout;
- if(n_ar_files==0) {
- msg("No archive name given, what should I do?");
- exit(EX_BADARCH);
- }
+ if (record_size == 0)
+ FATAL_ERROR ((0, 0, _("Invalid value for record_size")));
+
+ if (archive_names == 0)
+ FATAL_ERROR ((0, 0, _("No archive name given")));
+
+ tar_stat_destroy (¤t_stat_info);
+ save_name = 0;
+ real_s_name = 0;
- /*NOSTRICT*/
- if(f_multivol) {
- ar_block = (union record *) valloc((unsigned)(blocksize+(2*RECORDSIZE)));
- if(ar_block)
- ar_block += 2;
- } else
- ar_block = (union record *) valloc((unsigned)blocksize);
- if (!ar_block) {
- msg("could not allocate memory for blocking factor %d",
- blocking);
- exit(EX_ARGSBAD);
+ record_start =
+ page_aligned_alloc (&record_buffer,
+ (record_size
+ + (multi_volume_option ? 2 * BLOCKSIZE : 0)));
+ if (multi_volume_option)
+ record_start += 2;
+
+ current_block = record_start;
+ record_end = record_start + blocking_factor;
+ /* When updating the archive, we start with reading. */
+ access_mode = wanted_access == ACCESS_UPDATE ? ACCESS_READ : wanted_access;
+
+ read_full_records = read_full_records_option;
+
+ records_read = 0;
+
+ if (use_compress_program_option)
+ {
+ switch (wanted_access)
+ {
+ case ACCESS_READ:
+ child_pid = sys_child_open_for_uncompress ();
+ read_full_records = true;
+ record_end = record_start; /* set up for 1st record = # 0 */
+ break;
+
+ case ACCESS_WRITE:
+ child_pid = sys_child_open_for_compress ();
+ break;
+
+ case ACCESS_UPDATE:
+ abort (); /* Should not happen */
+ break;
}
- ar_record = ar_block;
- ar_last = ar_block + blocking;
- ar_reading = reading;
+ if (wanted_access == ACCESS_WRITE
+ && strcmp (archive_name_array[0], "-") == 0)
+ stdlis = stderr;
+ }
+ else if (strcmp (archive_name_array[0], "-") == 0)
+ {
+ read_full_records = true; /* could be a pipe, be safe */
+ if (verify_option)
+ FATAL_ERROR ((0, 0, _("Cannot verify stdin/stdout archive")));
- if (f_multivol && f_verify)
+ switch (wanted_access)
+ {
+ case ACCESS_READ:
{
- msg ("cannot verify multi-volume archives");
- exit (EX_ARGSBAD);
+ enum compress_type type;
+
+ archive = STDIN_FILENO;
+
+ type = check_compressed_archive (archive);
+ if (type != ct_none)
+ FATAL_ERROR ((0, 0,
+ _("Archive is compressed. Use %s option"),
+ compress_option (type)));
}
-
- if (f_compress) {
- if(reading==2 || f_verify) {
- msg("cannot update or verify compressed archives");
- exit(EX_ARGSBAD);
- }
- if (f_multivol) {
- msg ("cannot use multi-volume compressed archives");
- exit (EX_ARGSBAD);
- }
- child_open();
- if(!reading && ar_files[0][0]=='-' && ar_files[0][1]=='\0')
- msg_file = stderr;
- /* child_open(rem_host, rem_file); */
- } else if (ar_files[0][0] == '-' && ar_files[0][1] == '\0') {
- f_reblock++; /* Could be a pipe, be safe */
- if(f_verify) {
- msg("can't verify stdin/stdout archive");
- exit(EX_ARGSBAD);
- }
- if(reading==2) {
- archive=STDIN;
- msg_file=stderr;
- write_archive_to_stdout++;
- } else if (reading)
- archive = STDIN;
- else {
- archive = STDOUT;
- msg_file = stderr;
- }
- } else if (reading==2 || f_verify) {
- archive = rmtopen(ar_files[0], O_RDWR|O_CREAT|O_BINARY, 0666);
- } else if(reading) {
- archive = rmtopen(ar_files[0], O_RDONLY|O_BINARY, 0666);
- } else {
- archive = rmtcreat(ar_files[0], 0666);
+ break;
+
+ case ACCESS_WRITE:
+ archive = STDOUT_FILENO;
+ stdlis = stderr;
+ break;
+
+ case ACCESS_UPDATE:
+ archive = STDIN_FILENO;
+ stdlis = stderr;
+ write_archive_to_stdout = true;
+ break;
}
- if (archive < 0) {
- msg_perror("can't open %s",ar_files[0]);
- exit(EX_BADARCH);
- }
-#ifndef __MSDOS__
- if(!_isrmt(archive)) {
- struct stat tmp_stat;
-
- fstat(archive,&tmp_stat);
- if(S_ISREG(tmp_stat.st_mode)) {
- ar_dev=tmp_stat.st_dev;
- ar_ino=tmp_stat.st_ino;
- }
- }
-#endif
+ }
+ else if (verify_option)
+ archive = rmtopen (archive_name_array[0], O_RDWR | O_CREAT | O_BINARY,
+ MODE_RW, rsh_command_option);
+ else
+ switch (wanted_access)
+ {
+ case ACCESS_READ:
+ archive = open_compressed_archive ();
+ break;
+
+ case ACCESS_WRITE:
+ if (backup_option)
+ {
+ maybe_backup_file (archive_name_array[0], 1);
+ backed_up_flag = 1;
+ }
+ archive = rmtcreat (archive_name_array[0], MODE_RW,
+ rsh_command_option);
+ break;
+
+ case ACCESS_UPDATE:
+ archive = rmtopen (archive_name_array[0], O_RDWR | O_CREAT | O_BINARY,
+ MODE_RW, rsh_command_option);
+ break;
+ }
+
+ if (archive < 0
+ || (! _isrmt (archive) && !sys_get_archive_stat ()))
+ {
+ int saved_errno = errno;
-#ifdef __MSDOS__
- setmode(archive, O_BINARY);
-#endif
+ if (backed_up_flag)
+ undo_last_backup ();
+ errno = saved_errno;
+ open_fatal (archive_name_array[0]);
+ }
- if (reading) {
- ar_last = ar_block; /* Set up for 1st block = # 0 */
- (void) findrec(); /* Read it in, check for EOF */
+ sys_detect_dev_null_output ();
+ sys_save_archive_dev_ino ();
+ SET_BINARY_MODE (archive);
- if(f_volhdr) {
- union record *head;
-#if 0
- char *ptr;
+ switch (wanted_access)
+ {
+ case ACCESS_UPDATE:
+ records_written = 0;
+ record_end = record_start; /* set up for 1st record = # 0 */
- if(f_multivol) {
- ptr=malloc(strlen(f_volhdr)+20);
- sprintf(ptr,"%s Volume %d",f_volhdr,1);
- } else
- ptr=f_volhdr;
-#endif
- head=findrec();
- if(!head) {
- msg("Archive not labelled to match %s",f_volhdr);
- exit(EX_BADVOL);
- }
- if (re_match (label_pattern, head->header.arch_name,
- strlen (head->header.arch_name), 0, 0) < 0) {
- msg ("Volume mismatch! %s!=%s", f_volhdr,
- head->header.arch_name);
- exit (EX_BADVOL);
- }
-#if 0
- if(strcmp(ptr,head->header.name)) {
- msg("Volume mismatch! %s!=%s",ptr,head->header.name);
- exit(EX_BADVOL);
- }
- if(ptr!=f_volhdr)
- free(ptr);
-#endif
- }
- } else if(f_volhdr) {
- bzero((void *)ar_block,RECORDSIZE);
- if(f_multivol)
- sprintf(ar_block->header.arch_name,"%s Volume 1",f_volhdr);
- else
- strcpy(ar_block->header.arch_name,f_volhdr);
- ar_block->header.linkflag = LF_VOLHDR;
- to_oct(time(0), 1+12, ar_block->header.mtime);
- finish_header(ar_block);
- /* ar_record++; */
+ case ACCESS_READ:
+ find_next_block (); /* read it in, check for EOF */
+
+ if (volume_label_option)
+ {
+ union block *label = find_next_block ();
+
+ if (!label)
+ FATAL_ERROR ((0, 0, _("Archive not labeled to match %s"),
+ quote (volume_label_option)));
+ if (!check_label_pattern (label))
+ FATAL_ERROR ((0, 0, _("Volume %s does not match %s"),
+ quote_n (0, label->header.name),
+ quote_n (1, volume_label_option)));
}
-}
+ break;
+ case ACCESS_WRITE:
+ records_written = 0;
+ if (volume_label_option)
+ {
+ memset (record_start, 0, BLOCKSIZE);
+ if (multi_volume_option)
+ sprintf (record_start->header.name, "%s Volume 1",
+ volume_label_option);
+ else
+ strcpy (record_start->header.name, volume_label_option);
+
+ assign_string (¤t_stat_info.file_name,
+ record_start->header.name);
+ current_stat_info.had_trailing_slash =
+ strip_trailing_slashes (current_stat_info.file_name);
+
+ record_start->header.typeflag = GNUTYPE_VOLHDR;
+ TIME_TO_CHARS (start_time.tv_sec, record_start->header.mtime);
+ finish_header (¤t_stat_info, record_start, -1);
+ }
+ break;
+ }
+}
-/*
- * Remember a union record * as pointing to something that we
- * need to keep when reading onward in the file. Only one such
- * thing can be remembered at once, and it only works when reading
- * an archive.
- *
- * We calculate "offset" then add it because some compilers end up
- * adding (baserec+ar_record), doing a 9-bit shift of baserec, then
- * subtracting ar_block from that, shifting it back, losing the top 9 bits.
- */
+/* Perform a write to flush the buffer. */
void
-saverec(pointer)
- union record **pointer;
+flush_write (void)
{
- long offset;
+ int copy_back;
+ ssize_t status;
- save_rec = pointer;
- offset = ar_record - ar_block;
- saved_recno = baserec + offset;
-}
+ if (checkpoint_option && !(++checkpoint % 10))
+ /* TRANSLATORS: This is a ``checkpoint of write operation'',
+ *not* ``Writing a checkpoint''.
+ E.g. in Spanish ``Punto de comprobaci@'on de escritura'',
+ *not* ``Escribiendo un punto de comprobaci@'on'' */
+ WARN ((0, 0, _("Write checkpoint %d"), checkpoint));
-/*
- * Perform a write to flush the buffer.
- */
-
-/*send_buffer_to_file();
- if(new_volume) {
- deal_with_new_volume_stuff();
- send_buffer_to_file();
- }
- */
+ if (tape_length_option && tape_length_option <= bytes_written)
+ {
+ errno = ENOSPC;
+ status = 0;
+ }
+ else if (dev_null_output)
+ status = record_size;
+ else
+ status = sys_write_archive_buffer ();
+ if (status != record_size && !multi_volume_option)
+ archive_write_error (status);
-void
-fl_write()
-{
- int err;
- int copy_back;
- static long bytes_written = 0;
-
- if (f_checkpoint && ! (++checkpoint % 10))
- msg ("Write checkpoint %d\n", checkpoint);
- if(tape_length && bytes_written >= tape_length * 1024) {
- errno = ENOSPC;
- err = 0;
- } else
- err = rmtwrite(archive, ar_block->charptr,(int) blocksize);
- if(err!=blocksize && !f_multivol)
- writeerror(err);
- else if (f_totals)
- tot_written += blocksize;
-
- if(err>0)
- bytes_written+=err;
- if (err == blocksize) {
- if(f_multivol) {
- if(!save_name) {
- real_s_name[0]='\0';
- real_s_totsize=0;
- real_s_sizeleft = 0;
- return;
- }
-#ifdef __MSDOS__
- if(save_name[1]==':')
- save_name+=2;
-#endif
- while(*save_name=='/')
- save_name++;
+ if (status > 0)
+ {
+ records_written++;
+ bytes_written += status;
+ }
- strcpy(real_s_name,save_name);
- real_s_totsize = save_totsize;
- real_s_sizeleft = save_sizeleft;
- }
- return;
+ if (status == record_size)
+ {
+ if (multi_volume_option)
+ {
+ if (save_name)
+ {
+ assign_string (&real_s_name,
+ safer_name_suffix (save_name, false,
+ absolute_names_option));
+ real_s_totsize = save_totsize;
+ real_s_sizeleft = save_sizeleft;
+ }
+ else
+ {
+ assign_string (&real_s_name, 0);
+ real_s_totsize = 0;
+ real_s_sizeleft = 0;
+ }
}
+ return;
+ }
- /* We're multivol Panic if we didn't get the right kind of response */
- /* ENXIO is for the UNIX PC */
- if(err<0 && errno!=ENOSPC && errno!=EIO && errno!=ENXIO)
- writeerror(err);
-
- /* If error indicates a short write, we just move to the next tape. */
-
- if(new_volume(0)<0)
- return;
- bytes_written=0;
- if(f_volhdr && real_s_name[0]) {
- copy_back=2;
- ar_block-=2;
- } else if(f_volhdr || real_s_name[0]) {
- copy_back = 1;
- ar_block--;
- } else
- copy_back = 0;
- if(f_volhdr) {
- bzero((void *)ar_block,RECORDSIZE);
- sprintf(ar_block->header.arch_name,"%s Volume %d",f_volhdr,volno);
- to_oct(time(0), 1+12, ar_block->header.mtime);
- ar_block->header.linkflag = LF_VOLHDR;
- finish_header(ar_block);
- }
- if(real_s_name[0]) {
- int tmp;
-
- if(f_volhdr)
- ar_block++;
- bzero((void *)ar_block,RECORDSIZE);
- strcpy(ar_block->header.arch_name,real_s_name);
- ar_block->header.linkflag = LF_MULTIVOL;
- to_oct((long)real_s_sizeleft,1+12,
- ar_block->header.size);
- to_oct((long)real_s_totsize-real_s_sizeleft,
- 1+12,ar_block->header.offset);
- tmp=f_verbose;
- f_verbose=0;
- finish_header(ar_block);
- f_verbose=tmp;
- if(f_volhdr)
- ar_block--;
- }
+ /* We're multivol. Panic if we didn't get the right kind of response. */
- err = rmtwrite(archive, ar_block->charptr,(int) blocksize);
- if(err!=blocksize)
- writeerror(err);
- else if (f_totals)
- tot_written += blocksize;
-
-
- bytes_written = blocksize;
- if(copy_back) {
- ar_block+=copy_back;
- bcopy((void *)(ar_block+blocking-copy_back),
- (void *)ar_record,
- copy_back*RECORDSIZE);
- ar_record+=copy_back;
-
- if(real_s_sizeleft>=copy_back*RECORDSIZE)
- real_s_sizeleft-=copy_back*RECORDSIZE;
- else if((real_s_sizeleft+RECORDSIZE-1)/RECORDSIZE<=copy_back)
- real_s_name[0] = '\0';
- else {
-#ifdef __MSDOS__
- if(save_name[1]==':')
- save_name+=2;
-#endif
- while(*save_name=='/')
- save_name++;
+ /* ENXIO is for the UNIX PC. */
+ if (status < 0 && errno != ENOSPC && errno != EIO && errno != ENXIO)
+ archive_write_error (status);
- strcpy(real_s_name,save_name);
- real_s_sizeleft = save_sizeleft;
- real_s_totsize=save_totsize;
- }
- copy_back = 0;
+ /* If error indicates a short write, we just move to the next tape. */
+
+ if (!new_volume (ACCESS_WRITE))
+ return;
+
+ if (totals_option)
+ prev_written += bytes_written;
+ bytes_written = 0;
+
+ if (volume_label_option && real_s_name)
+ {
+ copy_back = 2;
+ record_start -= 2;
+ }
+ else if (volume_label_option || real_s_name)
+ {
+ copy_back = 1;
+ record_start--;
+ }
+ else
+ copy_back = 0;
+
+ if (volume_label_option)
+ {
+ memset (record_start, 0, BLOCKSIZE);
+ sprintf (record_start->header.name, "%s Volume %d",
+ volume_label_option, volno);
+ TIME_TO_CHARS (start_time.tv_sec, record_start->header.mtime);
+ record_start->header.typeflag = GNUTYPE_VOLHDR;
+ finish_header (¤t_stat_info, record_start, -1);
+ }
+
+ if (real_s_name)
+ {
+ int tmp;
+
+ if (volume_label_option)
+ record_start++;
+
+ if (strlen (real_s_name) > NAME_FIELD_SIZE)
+ WARN ((0, 0,
+ _("%s: file name too long to be stored in a GNU multivolume header, truncated"),
+ quotearg_colon (real_s_name)));
+
+ memset (record_start, 0, BLOCKSIZE);
+
+ /* FIXME: Michael P Urban writes: [a long name file] is being written
+ when a new volume rolls around [...] Looks like the wrong value is
+ being preserved in real_s_name, though. */
+
+ strncpy (record_start->header.name, real_s_name, NAME_FIELD_SIZE);
+ record_start->header.typeflag = GNUTYPE_MULTIVOL;
+
+ OFF_TO_CHARS (real_s_sizeleft, record_start->header.size);
+ OFF_TO_CHARS (real_s_totsize - real_s_sizeleft,
+ record_start->oldgnu_header.offset);
+
+ tmp = verbose_option;
+ verbose_option = 0;
+ finish_header (¤t_stat_info, record_start, -1);
+ verbose_option = tmp;
+
+ if (volume_label_option)
+ record_start--;
+ }
+
+ status = sys_write_archive_buffer ();
+ if (status != record_size)
+ archive_write_error (status);
+
+ bytes_written += status;
+
+ if (copy_back)
+ {
+ record_start += copy_back;
+ memcpy (current_block,
+ record_start + blocking_factor - copy_back,
+ copy_back * BLOCKSIZE);
+ current_block += copy_back;
+
+ if (real_s_sizeleft >= copy_back * BLOCKSIZE)
+ real_s_sizeleft -= copy_back * BLOCKSIZE;
+ else if ((real_s_sizeleft + BLOCKSIZE - 1) / BLOCKSIZE <= copy_back)
+ assign_string (&real_s_name, 0);
+ else
+ {
+ assign_string (&real_s_name,
+ safer_name_suffix (save_name, false,
+ absolute_names_option));
+ real_s_sizeleft = save_sizeleft;
+ real_s_totsize = save_totsize;
}
+ copy_back = 0;
+ }
}
-/* Handle write errors on the archive. Write errors are always fatal */
-/* Hitting the end of a volume does not cause a write error unless the write
-* was the first block of the volume */
-
+/* Handle write errors on the archive. Write errors are always fatal.
+ Hitting the end of a volume does not cause a write error unless the
+ write was the first record of the volume. */
void
-writeerror(err)
-int err;
+archive_write_error (ssize_t status)
{
- if (err < 0) {
- msg_perror("can't write to %s",ar_files[cur_ar_file]);
- exit(EX_BADARCH);
- } else {
- msg("only wrote %u of %u bytes to %s",err,blocksize,ar_files[cur_ar_file]);
- exit(EX_BADARCH);
- }
+ /* It might be useful to know how much was written before the error
+ occurred. */
+ if (totals_option)
+ {
+ int e = errno;
+ print_total_written ();
+ errno = e;
+ }
+
+ write_fatal_details (*archive_name_cursor, status, record_size);
}
-/*
- * Handle read errors on the archive.
- *
- * If the read should be retried, readerror() returns to the caller.
- */
+/* Handle read errors on the archive. If the read should be retried,
+ return to the caller. */
void
-readerror()
+archive_read_error (void)
{
-# define READ_ERROR_MAX 10
+ read_error (*archive_name_cursor);
- read_error_flag++; /* Tell callers */
+ if (record_start_block == 0)
+ FATAL_ERROR ((0, 0, _("At beginning of tape, quitting now")));
- msg_perror("read error on %s",ar_files[cur_ar_file]);
+ /* Read error in mid archive. We retry up to READ_ERROR_MAX times and
+ then give up on reading the archive. */
- if (baserec == 0) {
- /* First block of tape. Probably stupidity error */
- exit(EX_BADARCH);
- }
+ if (read_error_count++ > READ_ERROR_MAX)
+ FATAL_ERROR ((0, 0, _("Too many errors, quitting")));
+ return;
+}
+
+static void
+short_read (size_t status)
+{
+ size_t left; /* bytes left */
+ char *more; /* pointer to next byte to read */
+
+ more = record_start->buffer + status;
+ left = record_size - status;
+
+ while (left % BLOCKSIZE != 0
+ || (left && status && read_full_records))
+ {
+ if (status)
+ while ((status = rmtread (archive, more, left)) == SAFE_READ_ERROR)
+ archive_read_error ();
- /*
- * Read error in mid archive. We retry up to READ_ERROR_MAX times
- * and then give up on reading the archive. We set read_error_flag
- * for our callers, so they can cope if they want.
- */
- if (r_error_count++ > READ_ERROR_MAX) {
- msg("Too many errors, quitting.");
- exit(EX_BADARCH);
+ if (status == 0)
+ break;
+
+ if (! read_full_records)
+ {
+ unsigned long rest = record_size - left;
+
+ FATAL_ERROR ((0, 0,
+ ngettext ("Unaligned block (%lu byte) in archive",
+ "Unaligned block (%lu bytes) in archive",
+ rest),
+ rest));
}
- return;
-}
+ /* User warned us about this. Fix up. */
+
+ left -= status;
+ more += status;
+ }
+
+ /* FIXME: for size=0, multi-volume support. On the first record, warn
+ about the problem. */
+
+ if (!read_full_records && verbose_option > 1
+ && record_start_block == 0 && status != 0)
+ {
+ unsigned long rsize = (record_size - left) / BLOCKSIZE;
+ WARN ((0, 0,
+ ngettext ("Record size = %lu block",
+ "Record size = %lu blocks",
+ rsize),
+ rsize));
+ }
+
+ record_end = record_start + (record_size - left) / BLOCKSIZE;
+ records_read++;
+}
-/*
- * Perform a read to flush the buffer.
- */
+/* Perform a read to flush the buffer. */
void
-fl_read()
+flush_read (void)
{
- int err; /* Result from system call */
- int left; /* Bytes left */
- char *more; /* Pointer to next byte to read */
-
- if (f_checkpoint && ! (++checkpoint % 10))
- msg ("Read checkpoint %d\n", checkpoint);
-
- /*
- * Clear the count of errors. This only applies to a single
- * call to fl_read. We leave read_error_flag alone; it is
- * only turned off by higher level software.
- */
- r_error_count = 0; /* Clear error count */
-
- /*
- * If we are about to wipe out a record that
- * somebody needs to keep, copy it out to a holding
- * area and adjust somebody's pointer to it.
- */
- if (save_rec &&
- *save_rec >= ar_record &&
- *save_rec < ar_last) {
- record_save_area = **save_rec;
- *save_rec = &record_save_area;
- }
- if(write_archive_to_stdout && baserec!=0) {
- err=rmtwrite(1, ar_block->charptr, blocksize);
- if(err!=blocksize)
- writeerror(err);
+ size_t status; /* result from system call */
+
+ if (checkpoint_option && !(++checkpoint % 10))
+ /* TRANSLATORS: This is a ``checkpoint of read operation'',
+ *not* ``Reading a checkpoint''.
+ E.g. in Spanish ``Punto de comprobaci@'on de lectura'',
+ *not* ``Leyendo un punto de comprobaci@'on'' */
+ WARN ((0, 0, _("Read checkpoint %d"), checkpoint));
+
+ /* Clear the count of errors. This only applies to a single call to
+ flush_read. */
+
+ read_error_count = 0; /* clear error count */
+
+ if (write_archive_to_stdout && record_start_block != 0)
+ {
+ archive = STDOUT_FILENO;
+ status = sys_write_archive_buffer ();
+ archive = STDIN_FILENO;
+ if (status != record_size)
+ archive_write_error (status);
+ }
+ if (multi_volume_option)
+ {
+ if (save_name)
+ {
+ assign_string (&real_s_name,
+ safer_name_suffix (save_name, false,
+ absolute_names_option));
+ real_s_sizeleft = save_sizeleft;
+ real_s_totsize = save_totsize;
}
- if(f_multivol) {
- if(save_name) {
- if(save_name!=real_s_name) {
-#ifdef __MSDOS__
- if(save_name[1]==':')
- save_name+=2;
-#endif
- while(*save_name=='/')
- save_name++;
-
- strcpy(real_s_name,save_name);
- save_name=real_s_name;
- }
- real_s_totsize = save_totsize;
- real_s_sizeleft = save_sizeleft;
-
- } else {
- real_s_name[0]='\0';
- real_s_totsize=0;
- real_s_sizeleft = 0;
- }
+ else
+ {
+ assign_string (&real_s_name, 0);
+ real_s_totsize = 0;
+ real_s_sizeleft = 0;
}
+ }
-error_loop:
- err = rmtread(archive, ar_block->charptr, (int)blocksize);
- if (err == blocksize)
- return;
-
- if((err == 0 || (err<0 && errno==ENOSPC) || (err > 0 && !f_reblock)) && f_multivol) {
- union record *head;
-
- try_volume:
- if(new_volume((cmd_mode==CMD_APPEND || cmd_mode==CMD_CAT || cmd_mode==CMD_UPDATE) ? 2 : 1)<0)
- return;
- vol_error:
- err = rmtread(archive, ar_block->charptr,(int) blocksize);
- if(err < 0) {
- readerror();
- goto vol_error;
- }
- if(err!=blocksize)
- goto short_read;
-
- head=ar_block;
+ error_loop:
+ status = rmtread (archive, record_start->buffer, record_size);
+ if (status == record_size)
+ {
+ records_read++;
+ return;
+ }
- if(head->header.linkflag==LF_VOLHDR) {
- if(f_volhdr) {
-#if 0
- char *ptr;
+ /* The condition below used to include
+ || (status > 0 && !read_full_records)
+ This is incorrect since even if new_volume() succeeds, the
+ subsequent call to rmtread will overwrite the chunk of data
+ already read in the buffer, so the processing will fail */
- ptr=(char *)malloc(strlen(f_volhdr)+20);
- sprintf(ptr,"%s Volume %d",f_volhdr,volno);
-#endif
- if (re_match (label_pattern, head->header.arch_name,
- strlen (head->header.arch_name),
- 0, 0) < 0) {
- msg("Volume mismatch! %s!=%s",f_volhdr,
- head->header.arch_name);
- --volno;
- --global_volno;
- goto try_volume;
- }
-
-#if 0
- if(strcmp(ptr,head->header.name)) {
- msg("Volume mismatch! %s!=%s",ptr,head->header.name);
- --volno;
- --global_volno;
- free(ptr);
- goto try_volume;
- }
- free(ptr);
-#endif
- }
- if(f_verbose)
- fprintf(msg_file,"Reading %s\n",head->header.arch_name);
- head++;
- } else if(f_volhdr) {
- msg("Warning: No volume header!");
- }
+ if ((status == 0
+ || (status == SAFE_READ_ERROR && errno == ENOSPC))
+ && multi_volume_option)
+ {
+ union block *cursor;
- if(real_s_name[0]) {
- long from_oct();
-
- if(head->header.linkflag!=LF_MULTIVOL || strcmp(head->header.arch_name,real_s_name)) {
- msg("%s is not continued on this volume!",real_s_name);
- --volno;
- --global_volno;
- goto try_volume;
- }
- if(real_s_totsize!=from_oct(1+12,head->header.size)+from_oct(1+12,head->header.offset)) {
- msg("%s is the wrong size (%ld!=%ld+%ld)",
- head->header.arch_name,save_totsize,
- from_oct(1+12,head->header.size),
- from_oct(1+12,head->header.offset));
- --volno;
- --global_volno;
- goto try_volume;
- }
- if(real_s_totsize-real_s_sizeleft!=from_oct(1+12,head->header.offset)) {
- msg("This volume is out of sequence");
- --volno;
- --global_volno;
- goto try_volume;
- }
- head++;
- }
- ar_record=head;
- return;
- } else if (err < 0) {
- readerror();
- goto error_loop; /* Try again */
+ try_volume:
+ switch (subcommand_option)
+ {
+ case APPEND_SUBCOMMAND:
+ case CAT_SUBCOMMAND:
+ case UPDATE_SUBCOMMAND:
+ if (!new_volume (ACCESS_UPDATE))
+ return;
+ break;
+
+ default:
+ if (!new_volume (ACCESS_READ))
+ return;
+ break;
}
- short_read:
- more = ar_block->charptr + err;
- left = blocksize - err;
-
-again:
- if (0 == (((unsigned)left) % RECORDSIZE)) {
- /* FIXME, for size=0, multi vol support */
- /* On the first block, warn about the problem */
- if (!f_reblock && baserec == 0 && f_verbose && err > 0) {
- /* msg("Blocksize = %d record%s",
- err / RECORDSIZE, (err > RECORDSIZE)? "s": "");*/
- msg("Blocksize = %d records", err / RECORDSIZE);
+ while ((status = rmtread (archive, record_start->buffer, record_size))
+ == SAFE_READ_ERROR)
+ archive_read_error ();
+
+ if (status != record_size)
+ short_read (status);
+
+ cursor = record_start;
+
+ if (cursor->header.typeflag == GNUTYPE_VOLHDR)
+ {
+ if (volume_label_option)
+ {
+ if (!check_label_pattern (cursor))
+ {
+ WARN ((0, 0, _("Volume %s does not match %s"),
+ quote_n (0, cursor->header.name),
+ quote_n (1, volume_label_option)));
+ volno--;
+ global_volno--;
+ goto try_volume;
}
- ar_last = ar_block + ((unsigned)(blocksize - left))/RECORDSIZE;
- return;
+ }
+ if (verbose_option)
+ fprintf (stdlis, _("Reading %s\n"), quote (cursor->header.name));
+ cursor++;
}
- if (f_reblock) {
- /*
- * User warned us about this. Fix up.
- */
- if (left > 0) {
-error2loop:
- err = rmtread(archive, more, (int)left);
- if (err < 0) {
- readerror();
- goto error2loop; /* Try again */
- }
- if (err == 0) {
- msg("archive %s EOF not on block boundary",ar_files[cur_ar_file]);
- exit(EX_BADARCH);
- }
- left -= err;
- more += err;
- goto again;
- }
- } else {
- msg("only read %d bytes from archive %s",err,ar_files[cur_ar_file]);
- exit(EX_BADARCH);
+ else if (volume_label_option)
+ WARN ((0, 0, _("WARNING: No volume header")));
+
+ if (real_s_name)
+ {
+ uintmax_t s1, s2;
+ if (cursor->header.typeflag != GNUTYPE_MULTIVOL
+ || strncmp (cursor->header.name, real_s_name, NAME_FIELD_SIZE))
+ {
+ WARN ((0, 0, _("%s is not continued on this volume"),
+ quote (real_s_name)));
+ volno--;
+ global_volno--;
+ goto try_volume;
+ }
+ s1 = UINTMAX_FROM_HEADER (cursor->header.size);
+ s2 = UINTMAX_FROM_HEADER (cursor->oldgnu_header.offset);
+ if (real_s_totsize != s1 + s2 || s1 + s2 < s2)
+ {
+ char totsizebuf[UINTMAX_STRSIZE_BOUND];
+ char s1buf[UINTMAX_STRSIZE_BOUND];
+ char s2buf[UINTMAX_STRSIZE_BOUND];
+
+ WARN ((0, 0, _("%s is the wrong size (%s != %s + %s)"),
+ quote (cursor->header.name),
+ STRINGIFY_BIGINT (save_totsize, totsizebuf),
+ STRINGIFY_BIGINT (s1, s1buf),
+ STRINGIFY_BIGINT (s2, s2buf)));
+ volno--;
+ global_volno--;
+ goto try_volume;
+ }
+ if (real_s_totsize - real_s_sizeleft
+ != OFF_FROM_HEADER (cursor->oldgnu_header.offset))
+ {
+ WARN ((0, 0, _("This volume is out of sequence")));
+ volno--;
+ global_volno--;
+ goto try_volume;
+ }
+ cursor++;
}
-}
+ current_block = cursor;
+ records_read++;
+ return;
+ }
+ else if (status == SAFE_READ_ERROR)
+ {
+ archive_read_error ();
+ goto error_loop; /* try again */
+ }
+ short_read (status);
+}
-/*
- * Flush the current buffer to/from the archive.
- */
+/* Flush the current buffer to/from the archive. */
void
-flush_archive()
+flush_archive (void)
{
- int c;
-
- baserec += ar_last - ar_block; /* Keep track of block #s */
- ar_record = ar_block; /* Restore pointer to start */
- ar_last = ar_block + blocking; /* Restore pointer to end */
-
- if (ar_reading) {
- if(time_to_start_writing) {
- time_to_start_writing=0;
- ar_reading=0;
-
- if(file_to_switch_to>=0) {
- if((c=rmtclose(archive))<0)
- msg_perror("Warning: can't close %s(%d,%d)",ar_files[cur_ar_file],archive,c);
-
- archive=file_to_switch_to;
- } else
- (void)backspace_output();
- fl_write();
- } else
- fl_read();
- } else {
- fl_write();
- }
+ record_start_block += record_end - record_start;
+ current_block = record_start;
+ record_end = record_start + blocking_factor;
+
+ if (access_mode == ACCESS_READ && time_to_start_writing)
+ {
+ access_mode = ACCESS_WRITE;
+ time_to_start_writing = false;
+ backspace_output ();
+ }
+
+ switch (access_mode)
+ {
+ case ACCESS_READ:
+ flush_read ();
+ break;
+
+ case ACCESS_WRITE:
+ flush_write ();
+ break;
+
+ case ACCESS_UPDATE:
+ abort ();
+ }
}
-/* Backspace the archive descriptor by one blocks worth.
- If its a tape, MTIOCTOP will work. If its something else,
- we try to seek on it. If we can't seek, we lose! */
-int
-backspace_output()
+/* Backspace the archive descriptor by one record worth. If it's a
+ tape, MTIOCTOP will work. If it's something else, try to seek on
+ it. If we can't seek, we lose! */
+static void
+backspace_output (void)
{
- long cur;
- /* int er; */
- extern char *output_start;
-
#ifdef MTIOCTOP
- struct mtop t;
-
- t.mt_op = MTBSR;
- t.mt_count = 1;
- if((rmtioctl(archive,MTIOCTOP,&t))>=0)
- return 1;
- if(errno==EIO && (rmtioctl(archive,MTIOCTOP,&t))>=0)
- return 1;
+ {
+ struct mtop operation;
+
+ operation.mt_op = MTBSR;
+ operation.mt_count = 1;
+ if (rmtioctl (archive, MTIOCTOP, (char *) &operation) >= 0)
+ return;
+ if (errno == EIO && rmtioctl (archive, MTIOCTOP, (char *) &operation) >= 0)
+ return;
+ }
#endif
- cur=rmtlseek(archive,0L,1);
- cur-=blocksize;
- /* Seek back to the beginning of this block and
- start writing there. */
-
- if(rmtlseek(archive,cur,0)!=cur) {
- /* Lseek failed. Try a different method */
- msg("Couldn't backspace archive file. It may be unreadable without -i.");
- /* Replace the first part of the block with nulls */
- if(ar_block->charptr!=output_start)
- bzero(ar_block->charptr,output_start-ar_block->charptr);
- return 2;
- }
- return 3;
-}
+ {
+ off_t position = rmtlseek (archive, (off_t) 0, SEEK_CUR);
+ /* Seek back to the beginning of this record and start writing there. */
-/*
- * Close the archive file.
- */
-void
-close_archive()
-{
- int child;
- int status;
- int c;
-
- if (time_to_start_writing || !ar_reading)
- flush_archive();
- if(cmd_mode==CMD_DELETE) {
- off_t pos;
-
- pos = rmtlseek(archive,0L,1);
-#ifndef __MSDOS__
- (void) ftruncate(archive,pos);
-#else
- (void)rmtwrite(archive,"",0);
-#endif
- }
- if(f_verify)
- verify_volume();
-
- if((c=rmtclose(archive))<0)
- msg_perror("Warning: can't close %s(%d,%d)",ar_files[cur_ar_file],archive,c);
-
-#ifndef __MSDOS__
- if (childpid) {
- /*
- * Loop waiting for the right child to die, or for
- * no more kids.
- */
- while (((child = wait(&status)) != childpid) && child != -1)
- ;
-
- if (child != -1) {
- switch (WTERMSIG(status)) {
- case 0:
- /* Child voluntarily terminated -- but why? */
- if (WEXITSTATUS(status) == MAGIC_STAT) {
- exit(EX_SYSTEM);/* Child had trouble */
- }
- if (WEXITSTATUS(status) == (SIGPIPE + 128)) {
- /*
- * /bin/sh returns this if its child
- * dies with SIGPIPE. 'Sok.
- */
- break;
- } else if (WEXITSTATUS(status))
- msg("child returned status %d",
- WEXITSTATUS(status));
- case SIGPIPE:
- break; /* This is OK. */
-
- default:
- msg("child died with signal %d%s",
- WTERMSIG(status),
- WIFCOREDUMPED(status)? " (core dumped)": "");
- }
- }
- }
-#endif /* __MSDOS__ */
+ position -= record_size;
+ if (position < 0)
+ position = 0;
+ if (rmtlseek (archive, position, SEEK_SET) != position)
+ {
+ /* Lseek failed. Try a different method. */
+
+ WARN ((0, 0,
+ _("Cannot backspace archive file; it may be unreadable without -i")));
+
+ /* Replace the first part of the record with NULs. */
+
+ if (record_start->buffer != output_start)
+ memset (record_start->buffer, 0,
+ output_start - record_start->buffer);
+ }
+ }
}
+off_t
+seek_archive (off_t size)
+{
+ off_t start = current_block_ordinal ();
+ off_t offset;
+ off_t nrec, nblk;
+ off_t skipped = (blocking_factor - (current_block - record_start));
+
+ size -= skipped * BLOCKSIZE;
+
+ if (size < record_size)
+ return 0;
+ /* FIXME: flush? */
+
+ /* Compute number of records to skip */
+ nrec = size / record_size;
+ offset = rmtlseek (archive, nrec * record_size, SEEK_CUR);
+ if (offset < 0)
+ return offset;
+
+ if (offset % record_size)
+ FATAL_ERROR ((0, 0, _("rmtlseek not stopped at a record boundary")));
-#ifdef DONTDEF
-/*
- * Message management.
- *
- * anno writes a message prefix on stream (eg stdout, stderr).
- *
- * The specified prefix is normally output followed by a colon and a space.
- * However, if other command line options are set, more output can come
- * out, such as the record # within the archive.
- *
- * If the specified prefix is NULL, no output is produced unless the
- * command line option(s) are set.
- *
- * If the third argument is 1, the "saved" record # is used; if 0, the
- * "current" record # is used.
- */
+ /* Convert to number of records */
+ offset /= BLOCKSIZE;
+ /* Compute number of skipped blocks */
+ nblk = offset - start;
+
+ /* Update buffering info */
+ records_read += nblk / blocking_factor;
+ record_start_block = offset - blocking_factor;
+ current_block = record_end;
+
+ return nblk;
+}
+
+/* Close the archive file. */
void
-anno(stream, prefix, savedp)
- FILE *stream;
- char *prefix;
- int savedp;
+close_archive (void)
{
-# define MAXANNO 50
- char buffer[MAXANNO]; /* Holds annorecment */
-# define ANNOWIDTH 13
- int space;
- long offset;
- int save_e;
-
- save_e=errno;
- /* Make sure previous output gets out in sequence */
- if (stream == stderr)
- fflush(stdout);
- if (f_sayblock) {
- if (prefix) {
- fputs(prefix, stream);
- putc(' ', stream);
- }
- offset = ar_record - ar_block;
- (void) sprintf(buffer, "rec %d: ",
- savedp? saved_recno:
- baserec + offset);
- fputs(buffer, stream);
- space = ANNOWIDTH - strlen(buffer);
- if (space > 0) {
- fprintf(stream, "%*s", space, "");
- }
- } else if (prefix) {
- fputs(prefix, stream);
- fputs(": ", stream);
- }
- errno=save_e;
+ if (time_to_start_writing || access_mode == ACCESS_WRITE)
+ flush_archive ();
+
+ sys_drain_input_pipe ();
+
+ compute_duration ();
+ if (verify_option)
+ verify_volume ();
+
+ if (rmtclose (archive) != 0)
+ close_warn (*archive_name_cursor);
+
+ sys_wait_for_child (child_pid);
+
+ tar_stat_destroy (¤t_stat_info);
+ if (save_name)
+ free (save_name);
+ if (real_s_name)
+ free (real_s_name);
+ free (record_buffer);
}
-#endif
-/* Called to initialize the global volume number. */
-int
-init_volume_number ()
+/* Called to initialize the global volume number. */
+void
+init_volume_number (void)
{
- FILE *vf;
-
- vf = fopen (f_volno_file, "r");
- if (!vf && errno != ENOENT)
- msg_perror ("%s", f_volno_file);
-
- if (vf)
+ FILE *file = fopen (volno_file_option, "r");
+
+ if (file)
{
- fscanf (vf, "%d", &global_volno);
- fclose (vf);
+ if (fscanf (file, "%d", &global_volno) != 1
+ || global_volno < 0)
+ FATAL_ERROR ((0, 0, _("%s: contains invalid volume number"),
+ quotearg_colon (volno_file_option)));
+ if (ferror (file))
+ read_error (volno_file_option);
+ if (fclose (file) != 0)
+ close_error (volno_file_option);
}
+ else if (errno != ENOENT)
+ open_error (volno_file_option);
}
-/* Called to write out the closing global volume number. */
-int
-closeout_volume_number ()
+/* Called to write out the closing global volume number. */
+void
+closeout_volume_number (void)
{
- FILE *vf;
-
- vf = fopen (f_volno_file, "w");
- if (!vf)
- msg_perror ("%s", f_volno_file);
- else
+ FILE *file = fopen (volno_file_option, "w");
+
+ if (file)
{
- fprintf (vf, "%d\n", global_volno);
- fclose (vf);
+ fprintf (file, "%d\n", global_volno);
+ if (ferror (file))
+ write_error (volno_file_option);
+ if (fclose (file) != 0)
+ close_error (volno_file_option);
}
+ else
+ open_error (volno_file_option);
}
-
-/* We've hit the end of the old volume. Close it and open the next one */
-/* Values for type: 0: writing 1: reading 2: updating */
-int
-new_volume(type)
-int type;
+
+/* We've hit the end of the old volume. Close it and open the next one.
+ Return nonzero on success.
+*/
+static bool
+new_volume (enum access_mode mode)
{
- int c;
- char inbuf[80];
- char *p;
- static FILE *read_file = 0;
- extern int now_verifying;
- extern char TTY_NAME[];
- static int looped = 0;
-
- if(!read_file && !f_run_script_at_end)
- read_file = (archive==0) ? fopen(TTY_NAME, "r") : stdin;
-
- if(now_verifying)
- return -1;
- if(f_verify)
- verify_volume();
- if((c=rmtclose(archive))<0)
- msg_perror("Warning: can't close %s(%d,%d)",ar_files[cur_ar_file],archive,c);
-
- global_volno++;
- volno++;
- cur_ar_file++;
- if (cur_ar_file == n_ar_files)
- {
- cur_ar_file = 0;
- looped = 1;
- }
-
+ static FILE *read_file;
+ static int looped;
+
+ if (!read_file && !info_script_option)
+ /* FIXME: if fopen is used, it will never be closed. */
+ read_file = archive == STDIN_FILENO ? fopen (TTY_NAME, "r") : stdin;
+
+ if (now_verifying)
+ return false;
+ if (verify_option)
+ verify_volume ();
+
+ if (rmtclose (archive) != 0)
+ close_warn (*archive_name_cursor);
+
+ global_volno++;
+ if (global_volno < 0)
+ FATAL_ERROR ((0, 0, _("Volume number overflow")));
+ volno++;
+ archive_name_cursor++;
+ if (archive_name_cursor == archive_name_array + archive_names)
+ {
+ archive_name_cursor = archive_name_array;
+ looped = 1;
+ }
+
tryagain:
- if (looped)
+ if (looped)
+ {
+ /* We have to prompt from now on. */
+
+ if (info_script_option)
+ {
+ if (volno_file_option)
+ closeout_volume_number ();
+ if (system (info_script_option) != 0)
+ FATAL_ERROR ((0, 0, _("%s command failed"),
+ quote (info_script_option)));
+ }
+ else
+ while (1)
{
- /* We have to prompt from now on. */
- if (f_run_script_at_end)
- system(info_script);
- else for(;;) {
- fprintf(msg_file,"\007Prepare volume #%d for %s and hit return: ",global_volno, ar_files[cur_ar_file]);
- fflush(msg_file);
- if(fgets(inbuf,sizeof(inbuf),read_file)==0) {
- fprintf(msg_file,"EOF? What does that mean?");
- if(cmd_mode!=CMD_EXTRACT && cmd_mode!=CMD_LIST && cmd_mode!=CMD_DIFF)
- msg("Warning: Archive is INCOMPLETE!");
- exit(EX_BADARCH);
- }
- if(inbuf[0]=='\n' || inbuf[0]=='y' || inbuf[0]=='Y')
- break;
-
- switch(inbuf[0]) {
- case '?':
- {
- fprintf(msg_file,"\
- n [name] Give a new filename for the next (and subsequent) volume(s)\n\
+ char input_buffer[80];
+
+ fputc ('\007', stderr);
+ fprintf (stderr,
+ _("Prepare volume #%d for %s and hit return: "),
+ global_volno, quote (*archive_name_cursor));
+ fflush (stderr);
+
+ if (fgets (input_buffer, sizeof input_buffer, read_file) == 0)
+ {
+ WARN ((0, 0, _("EOF where user reply was expected")));
+
+ if (subcommand_option != EXTRACT_SUBCOMMAND
+ && subcommand_option != LIST_SUBCOMMAND
+ && subcommand_option != DIFF_SUBCOMMAND)
+ WARN ((0, 0, _("WARNING: Archive is incomplete")));
+
+ fatal_exit ();
+ }
+ if (input_buffer[0] == '\n'
+ || input_buffer[0] == 'y'
+ || input_buffer[0] == 'Y')
+ break;
+
+ switch (input_buffer[0])
+ {
+ case '?':
+ {
+ /* FIXME: Might it be useful to disable the '!' command? */
+ fprintf (stderr, _("\
+ n [name] Give a new file name for the next (and subsequent) volume(s)\n\
q Abort tar\n\
! Spawn a subshell\n\
- ? Print this list\n");
- }
- break;
-
- case 'q': /* Quit */
- fprintf(msg_file,"No new volume; exiting.\n");
- if(cmd_mode!=CMD_EXTRACT && cmd_mode!=CMD_LIST && cmd_mode!=CMD_DIFF)
- msg("Warning: Archive is INCOMPLETE!");
- exit(EX_BADARCH);
-
- case 'n': /* Get new file name */
- {
- char *q,*r;
- static char *old_name;
-
- for(q= &inbuf[1];*q==' ' || *q=='\t';q++)
- ;
- for(r=q;*r;r++)
- if(*r=='\n')
- *r='\0';
- old_name=p=(char *)malloc((unsigned)(strlen(q)+2));
- if(p==0) {
- msg("Can't allocate memory for name");
- exit(EX_SYSTEM);
- }
- (void) strcpy(p,q);
- ar_files[cur_ar_file]=p;
- }
- break;
-
- case '!':
-#ifdef __MSDOS__
- spawnl(P_WAIT,getenv("COMSPEC"),"-",0);
-#else
- /* JF this needs work! */
- switch(fork()) {
- case -1:
- msg_perror("can't fork!");
- break;
- case 0:
- p=getenv("SHELL");
- if(p==0) p="/bin/sh";
- execlp(p,"-sh","-i",0);
- msg_perror("can't exec a shell %s",p);
- _exit(55);
- default:
- wait(0);
- break;
- }
-#endif
- break;
- }
- }
- }
-
-
- if(type==2 || f_verify)
- archive=rmtopen(ar_files[cur_ar_file],O_RDWR|O_CREAT,0666);
- else if(type==1)
- archive=rmtopen(ar_files[cur_ar_file],O_RDONLY,0666);
- else if(type==0)
- archive=rmtcreat(ar_files[cur_ar_file],0666);
- else
- archive= -1;
-
- if(archive<0) {
- msg_perror("can't open %s",ar_files[cur_ar_file]);
- goto tryagain;
- }
-#ifdef __MSDOS__
- setmode(archive,O_BINARY);
-#endif
- return 0;
-}
+ ? Print this list\n"));
+ }
+ break;
-/* this is a useless function that takes a buffer returned by wantbytes
- and does nothing with it. If the function called by wantbytes returns
- an error indicator (non-zero), this function is called for the rest of
- the file.
- */
-int
-no_op(size,data)
-int size;
-char *data;
-{
- return 0;
-}
+ case 'q':
+ /* Quit. */
-/* Some other routine wants SIZE bytes in the archive. For each chunk of
- the archive, call FUNC with the size of the chunk, and the address of
- the chunk it can work with.
- */
-int
-wantbytes(size,func)
-long size;
-int (*func)();
-{
- char *data;
- long data_size;
-
- while(size) {
- data = findrec()->charptr;
- if (data == NULL) { /* Check it... */
- msg("Unexpected EOF on archive file");
- return -1;
+ WARN ((0, 0, _("No new volume; exiting.\n")));
+
+ if (subcommand_option != EXTRACT_SUBCOMMAND
+ && subcommand_option != LIST_SUBCOMMAND
+ && subcommand_option != DIFF_SUBCOMMAND)
+ WARN ((0, 0, _("WARNING: Archive is incomplete")));
+
+ fatal_exit ();
+
+ case 'n':
+ /* Get new file name. */
+
+ {
+ char *name = &input_buffer[1];
+ char *cursor;
+
+ for (name = input_buffer + 1;
+ *name == ' ' || *name == '\t';
+ name++)
+ ;
+
+ for (cursor = name; *cursor && *cursor != '\n'; cursor++)
+ ;
+ *cursor = '\0';
+
+ /* FIXME: the following allocation is never reclaimed. */
+ *archive_name_cursor = xstrdup (name);
}
- data_size = endofrecs()->charptr - data;
- if(data_size>size)
- data_size=size;
- if((*func)(data_size,data))
- func=no_op;
- userec((union record *)(data + data_size - 1));
- size-=data_size;
- }
- return 0;
+ break;
+
+ case '!':
+ sys_spawn_shell ();
+ break;
+ }
+ }
+ }
+
+ if (strcmp (archive_name_cursor[0], "-") == 0)
+ {
+ read_full_records = true;
+ archive = STDIN_FILENO;
+ }
+ else if (verify_option)
+ archive = rmtopen (*archive_name_cursor, O_RDWR | O_CREAT, MODE_RW,
+ rsh_command_option);
+ else
+ switch (mode)
+ {
+ case ACCESS_READ:
+ archive = rmtopen (*archive_name_cursor, O_RDONLY, MODE_RW,
+ rsh_command_option);
+ break;
+
+ case ACCESS_WRITE:
+ if (backup_option)
+ maybe_backup_file (*archive_name_cursor, 1);
+ archive = rmtcreat (*archive_name_cursor, MODE_RW,
+ rsh_command_option);
+ break;
+
+ case ACCESS_UPDATE:
+ archive = rmtopen (*archive_name_cursor, O_RDWR | O_CREAT, MODE_RW,
+ rsh_command_option);
+ break;
+ }
+
+ if (archive < 0)
+ {
+ open_warn (*archive_name_cursor);
+ if (!verify_option && mode == ACCESS_WRITE && backup_option)
+ undo_last_backup ();
+ goto tryagain;
+ }
+
+ SET_BINARY_MODE (archive);
+
+ return true;
}
projects / chaz / tar / blobdiff