From 48be206fbfd81aa56056d7327fa8295e27011e5f Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Fri, 31 Oct 1997 00:58:55 +0000 Subject: [PATCH] (to_oct): Now static. Value arg is now uintmax_t. Accept new args giving name of type of octal field, for error messages. Report an error if the value is too large to fit in the field. (gid_to_oct, major_to_oct, minor_to_oct, mode_to_oct, off_to_oct, size_to_oct, time_to_oct, uid_to_oct, uintmax_to_oct): New functions. (write_eot, write_long, finish_header, deal_with_sparse, finish_sparse_file, dump_file): Use dev_t, off_t, ssize_t, size_t when appropriate. Remove now-useless casts. Use unsigned long to print *_t types, except use STRINGIFY_BIGINT for off_t. (find_new_file_size): 1st arg is now off_t*. (finish_sparse_file): Args now use off_t, not long. Check for lseek error. (create_archive, dump_file): Cast -1 to dev_t when necessary. (dump_file): Device arg is now dev_t. Avoid overflow when testing whether file has holes by using the new ST_NBLOCKSIZE macro. --- src/create.c | 281 ++++++++++++++++++++++++++++++++------------------- 1 file changed, 176 insertions(+), 105 deletions(-) diff --git a/src/create.c b/src/create.c index 114688f..d5c8c92 100644 --- a/src/create.c +++ b/src/create.c @@ -57,35 +57,89 @@ struct link *linklist = NULL; /* points to first link in list */ /*------------------------------------------------------------------------. -| Converts long VALUE into a DIGS-digit field at WHERE, including a | -| trailing space and room for a NUL. For example, 3 for DIGS 3 means one | -| digit, a space, and room for a NUL. | +| Convert VALUE into a size-SIZE field at WHERE, including a | +| trailing space. For example, 3 for SIZE means two digits and a space. | | | | We assume the trailing NUL is already there and don't fill it in. This | | fact is used by start_header and finish_header, so don't change it! | `------------------------------------------------------------------------*/ -/* This should be equivalent to: sprintf (WHERE, "%*lo ", DIGS - 2, VALUE); +/* This should be equivalent to: sprintf (WHERE, "%*lo ", SIZE - 1, VALUE); + except that we don't assume VALUE fits in an unsigned long, and except that sprintf fills in the trailing NUL and we don't. */ -void -to_oct (long value, int digs, char *where) +static void +to_oct (uintmax_t value, char *where, size_t size, const char *type) { - --digs; /* Trailing null slot is left alone */ - where[--digs] = ' '; /* put in the space, though */ + uintmax_t v = value; + size_t i = size; + where[--i] = ' '; /* put in the space, though */ /* Produce the digits -- at least one. */ do { - where[--digs] = '0' + (char) (value & 7); /* one octal digit */ - value >>= 3; + where[--i] = '0' + (int) (v & 7); /* one octal digit */ + v >>= 3; } - while (digs > 0 && value != 0); + while (i != 0 && v != 0); /* Leading spaces, if necessary. */ - while (digs > 0) - where[--digs] = ' '; + while (i != 0) + where[--i] = ' '; + + if (v != 0) + { + char buf[UINTMAX_STRSIZE_BOUND]; + ERROR ((0, 0, _("%s value %s is too large to fit in a %u-bit field"), + type, STRINGIFY_BIGINT (value, buf), + (unsigned) ((size - 1) * 3))); + } +} +void +gid_to_oct (gid_t v, char *p, size_t s) +{ + to_oct (v, p, s, "gid_t"); +} +void +major_to_oct (major_t v, char *p, size_t s) +{ + to_oct (v, p, s, "major_t"); +} +void +minor_to_oct (minor_t v, char *p, size_t s) +{ + to_oct (v, p, s, "minor_t"); +} +void +mode_to_oct (mode_t v, char *p, size_t s) +{ + to_oct (v, p, s, "mode_t"); +} +void +off_to_oct (off_t v, char *p, size_t s) +{ + to_oct (v, p, s, "off_t"); +} +void +size_to_oct (size_t v, char *p, size_t s) +{ + to_oct (v, p, s, "size_t"); +} +void +time_to_oct (time_t v, char *p, size_t s) +{ + to_oct (v, p, s, "time_t"); +} +void +uid_to_oct (uid_t v, char *p, size_t s) +{ + to_oct (v, p, s, "uid_t"); +} +void +uintmax_to_oct (uintmax_t v, char *p, size_t s) +{ + to_oct (v, p, s, "uintmax_t"); } /* Writing routines. */ @@ -114,9 +168,9 @@ write_eot (void) if (pointer) { - int space = available_space_after (pointer); + size_t space = available_space_after (pointer); - memset (pointer->buffer, 0, (size_t) space); + memset (pointer->buffer, 0, space); set_next_block_after (pointer); } } @@ -132,8 +186,8 @@ static union block *start_header PARAMS ((const char *, struct stat *)); static void write_long (const char *p, char type) { - int size = strlen (p) + 1; - int bufsize; + size_t size = strlen (p) + 1; + size_t bufsize; union block *header; struct stat foo; @@ -150,15 +204,15 @@ write_long (const char *p, char type) while (bufsize < size) { - memcpy (header->buffer, p, (size_t) bufsize); + memcpy (header->buffer, p, bufsize); p += bufsize; size -= bufsize; set_next_block_after (header + (bufsize - 1) / BLOCKSIZE); header = find_next_block (); bufsize = available_space_after (header); } - memcpy (header->buffer, p, (size_t) size); - memset (header->buffer + size, 0, (size_t) (bufsize - size)); + memcpy (header->buffer, p, size); + memset (header->buffer + size, 0, bufsize - size); set_next_block_after (header + (size - 1) / BLOCKSIZE); } @@ -248,20 +302,20 @@ Removing leading `/' from absolute path names in the archive"))); acceptor for Paul's test. */ if (archive_format == V7_FORMAT) - to_oct ((long) st->st_mode & 07777, 8, header->header.mode); + MODE_TO_OCT (st->st_mode & 07777, header->header.mode); else - to_oct ((long) st->st_mode, 8, header->header.mode); + MODE_TO_OCT (st->st_mode, header->header.mode); - to_oct ((long) st->st_uid, 8, header->header.uid); - to_oct ((long) st->st_gid, 8, header->header.gid); - to_oct ((long) st->st_size, 1 + 12, header->header.size); - to_oct ((long) st->st_mtime, 1 + 12, header->header.mtime); + UID_TO_OCT (st->st_uid, header->header.uid); + GID_TO_OCT (st->st_gid, header->header.gid); + OFF_TO_OCT (st->st_size, header->header.size); + TIME_TO_OCT (st->st_mtime, header->header.mtime); if (incremental_option) if (archive_format == OLDGNU_FORMAT) { - to_oct ((long) st->st_atime, 1 + 12, header->oldgnu_header.atime); - to_oct ((long) st->st_ctime, 1 + 12, header->oldgnu_header.ctime); + TIME_TO_OCT (st->st_atime, header->oldgnu_header.atime); + TIME_TO_OCT (st->st_ctime, header->oldgnu_header.ctime); } header->header.typeflag = archive_format == V7_FORMAT ? AREGTYPE : REGTYPE; @@ -305,14 +359,15 @@ Removing leading `/' from absolute path names in the archive"))); void finish_header (union block *header) { - int i, sum; + size_t i; + int sum; char *p; memcpy (header->header.chksum, CHKBLANKS, sizeof (header->header.chksum)); sum = 0; p = header->buffer; - for (i = sizeof (*header); --i >= 0; ) + for (i = sizeof (*header); i-- != 0; ) /* We can't use unsigned char here because of old compilers, e.g. V7. */ sum += 0xFF & *p++; @@ -326,7 +381,7 @@ finish_header (union block *header) sprintf(header->header.chksum, "%6o", sum); */ - to_oct ((long) sum, 8, header->header.chksum); + UINTMAX_TO_OCT ((uintmax_t) sum, header->header.chksum); header->header.chksum[6] = '\0'; /* zap the space */ set_next_block_after (header); @@ -390,7 +445,7 @@ init_sparsearray (void) `---*/ static void -find_new_file_size (int *filesize, int highest_index) +find_new_file_size (off_t *filesize, int highest_index) { int counter; @@ -417,11 +472,11 @@ find_new_file_size (int *filesize, int highest_index) static int deal_with_sparse (char *name, union block *header) { - long numbytes = 0; - long offset = 0; + size_t numbytes = 0; + off_t offset = 0; int file; int sparse_index = 0; - int count; + ssize_t count; char buffer[BLOCKSIZE]; if (archive_format == OLDGNU_FORMAT) @@ -511,14 +566,12 @@ deal_with_sparse (char *name, union block *header) `---*/ static int -finish_sparse_file (int file, long *sizeleft, long fullsize, char *name) +finish_sparse_file (int file, off_t *sizeleft, off_t fullsize, char *name) { union block *start; - int bufsize; + size_t bufsize; int sparse_index = 0; - int count; - long pos; - long nwritten = 0; + ssize_t count; while (*sizeleft > 0) { @@ -528,12 +581,24 @@ finish_sparse_file (int file, long *sizeleft, long fullsize, char *name) if (!bufsize) { /* We blew it, maybe. */ + char buf1[UINTMAX_STRSIZE_BOUND]; + char buf2[UINTMAX_STRSIZE_BOUND]; + + ERROR ((0, 0, _("Wrote %s of %s bytes to file %s"), + STRINGIFY_BIGINT (fullsize - *sizeleft, buf1), + STRINGIFY_BIGINT (fullsize, buf2), + name)); + break; + } - ERROR ((0, 0, _("Wrote %ld of %ld bytes to file %s"), - fullsize - *sizeleft, fullsize, name)); + if (lseek (file, sparsearray[sparse_index++].offset, 0) < 0) + { + char buf[UINTMAX_STRSIZE_BOUND]; + ERROR ((0, errno, _("lseek error at byte %s in file %s"), + STRINGIFY_BIGINT (sparsearray[sparse_index - 1].offset, buf), + name)); break; } - pos = lseek (file, sparsearray[sparse_index++].offset, 0); /* If the number of bytes to be written here exceeds the size of the temporary buffer, do it in steps. */ @@ -557,15 +622,16 @@ finish_sparse_file (int file, long *sizeleft, long fullsize, char *name) count = read (file, start->buffer, BLOCKSIZE); if (count < 0) { + char buf[UINTMAX_STRSIZE_BOUND]; ERROR ((0, errno, _("\ -Read error at byte %ld, reading %d bytes, in file %s"), - fullsize - *sizeleft, bufsize, name)); +Read error at byte %s, reading %lu bytes, in file %s"), + STRINGIFY_BIGINT (fullsize - *sizeleft, buf), + (unsigned long) bufsize, name)); return 1; } bufsize -= count; *sizeleft -= count; set_next_block_after (start); - nwritten += BLOCKSIZE; /* FIXME: ??? */ start = find_next_block (); memset (start->buffer, 0, BLOCKSIZE); } @@ -574,15 +640,18 @@ Read error at byte %ld, reading %d bytes, in file %s"), char buffer[BLOCKSIZE]; clear_buffer (buffer); - count = read (file, buffer, (size_t) bufsize); + count = read (file, buffer, bufsize); memcpy (start->buffer, buffer, BLOCKSIZE); } if (count < 0) { + char buf[UINTMAX_STRSIZE_BOUND]; + ERROR ((0, errno, - _("Read error at byte %ld, reading %d bytes, in file %s"), - fullsize - *sizeleft, bufsize, name)); + _("Read error at byte %s, reading %lu bytes, in file %s"), + STRINGIFY_BIGINT (fullsize - *sizeleft, buf), + (unsigned long) bufsize, name)); return 1; } #if 0 @@ -593,8 +662,8 @@ Read error at byte %ld, reading %d bytes, in file %s"), if (count != bufsize) { ERROR ((0, 0, - _("File %s shrunk by %d bytes, padding with zeros"), - name, sizeleft)); + _("File %s shrunk, padding with zeros"), + name)); return 1; } start = find_next_block (); @@ -602,14 +671,12 @@ Read error at byte %ld, reading %d bytes, in file %s"), else amount_read += bufsize; #endif - nwritten += count; /* FIXME: ??? */ *sizeleft -= count; set_next_block_after (start); } free (sparsearray); #if 0 - printf (_("Amount actually written is (I hope) %d.\n"), nwritten); set_next_block_after (start + (count - 1) / BLOCKSIZE); #endif return 0; @@ -631,12 +698,13 @@ create_archive (void) if (incremental_option) { char *buffer = xmalloc (PATH_MAX); - char *q, *bufp; + const char *q; + char *bufp; collect_and_sort_names (); while (p = name_from_list (), p) - dump_file (p, -1, 1); + dump_file (p, (dev_t) -1, 1); blank_name_list (); while (p = name_from_list (), p) @@ -652,7 +720,7 @@ create_archive (void) if (*q == 'Y') { strcpy (bufp, q + 1); - dump_file (buffer, -1, 1); + dump_file (buffer, (dev_t) -1, 1); } } } @@ -661,7 +729,7 @@ create_archive (void) else { while (p = name_next (1), p) - dump_file (p, -1, 1); + dump_file (p, (dev_t) -1, 1); } write_eot (); @@ -683,7 +751,7 @@ create_archive (void) exit_status to failure, a clear diagnostic has been issued. */ void -dump_file (char *p, int parent_device, int top_level) +dump_file (char *p, dev_t parent_device, int top_level) { union block *header; char type; @@ -738,7 +806,7 @@ dump_file (char *p, int parent_device, int top_level) && current_stat.st_mtime < newer_mtime_option && (!after_date_option || current_stat.st_ctime < newer_ctime_option)) { - if (parent_device == -1) + if (parent_device == (dev_t) -1) WARN ((0, 0, _("%s: is unchanged; not dumped"), p)); /* FIXME: recheck this return. */ return; @@ -850,8 +918,9 @@ Removing leading `/' from absolute links"))); ) { int f; /* file descriptor */ - long bufsize, count; - long sizeleft; + size_t bufsize; + ssize_t count; + off_t sizeleft; union block *start; int header_moved; char isextended = 0; @@ -873,10 +942,6 @@ Removing leading `/' from absolute links"))); files not having more hole blocks than indirect blocks, the sparseness will go undetected. */ - /* tar.h defines ST_NBLOCKS in term of 512 byte sectors, even - for HP-UX's which count in 1024 byte units and AIX's which - count in 4096 byte units. So this should work... */ - /* Bruno Haible sent me these statistics for Linux. It seems that some filesystems count indirect blocks in st_blocks, while others do not seem to: @@ -899,9 +964,11 @@ Removing leading `/' from absolute links"))); st_blocks, so `du' and `ls -s' give wrong results. So, the --sparse option would not work on a minix filesystem. */ - if (current_stat.st_size > ST_NBLOCKS (current_stat) * BLOCKSIZE) + if (ST_NBLOCKS (current_stat) + < (current_stat.st_size / ST_NBLOCKSIZE + + (current_stat.st_size % ST_NBLOCKSIZE != 0))) { - int filesize = current_stat.st_size; + off_t filesize = current_stat.st_size; int counter; header = start_header (p, ¤t_stat); @@ -930,8 +997,8 @@ Removing leading `/' from absolute links"))); . It might be kind of disconcerting if the shrunken file size was the one that showed up. */ - to_oct ((long) current_stat.st_size, 1 + 12, - header->oldgnu_header.realsize); + OFF_TO_OCT (current_stat.st_size, + header->oldgnu_header.realsize); /* This will be the new "size" of the file, i.e., the size of the file minus the blocks of holes that we're @@ -939,17 +1006,17 @@ Removing leading `/' from absolute links"))); find_new_file_size (&filesize, upperbound); current_stat.st_size = filesize; - to_oct ((long) filesize, 1 + 12, header->header.size); + OFF_TO_OCT (filesize, header->header.size); for (counter = 0; counter < SPARSES_IN_OLDGNU_HEADER; counter++) { if (!sparsearray[counter].numbytes) break; - to_oct (sparsearray[counter].offset, 1 + 12, - header->oldgnu_header.sp[counter].offset); - to_oct (sparsearray[counter].numbytes, 1 + 12, - header->oldgnu_header.sp[counter].numbytes); + OFF_TO_OCT (sparsearray[counter].offset, + header->oldgnu_header.sp[counter].offset); + SIZE_TO_OCT (sparsearray[counter].numbytes, + header->oldgnu_header.sp[counter].numbytes); } } @@ -1025,12 +1092,10 @@ Removing leading `/' from absolute links"))); if (counter + index_offset > upperbound) break; - to_oct ((long) sparsearray[counter + index_offset].numbytes, - 1 + 12, - exhdr->sparse_header.sp[counter].numbytes); - to_oct ((long) sparsearray[counter + index_offset].offset, - 1 + 12, - exhdr->sparse_header.sp[counter].offset); + SIZE_TO_OCT (sparsearray[counter + index_offset].numbytes, + exhdr->sparse_header.sp[counter].numbytes); + OFF_TO_OCT (sparsearray[counter + index_offset].offset, + exhdr->sparse_header.sp[counter].offset); } set_next_block_after (exhdr); #if 0 @@ -1068,7 +1133,7 @@ Removing leading `/' from absolute links"))); { /* Last read -- zero out area beyond. */ - bufsize = (int) sizeleft; + bufsize = sizeleft; count = bufsize % BLOCKSIZE; if (count) memset (start->buffer + sizeleft, 0, @@ -1077,12 +1142,15 @@ Removing leading `/' from absolute links"))); if (f < 0) count = bufsize; else - count = read (f, start->buffer, (size_t) bufsize); + count = read (f, start->buffer, bufsize); if (count < 0) { + char buf[UINTMAX_STRSIZE_BOUND]; ERROR ((0, errno, _("\ -Read error at byte %ld, reading %d bytes, in file %s"), - (long) (current_stat.st_size - sizeleft), bufsize, p)); +Read error at byte %s, reading %lu bytes, in file %s"), + STRINGIFY_BIGINT (current_stat.st_size - sizeleft, + buf), + (unsigned long) bufsize, p)); goto padit; } sizeleft -= count; @@ -1093,9 +1161,14 @@ Read error at byte %ld, reading %d bytes, in file %s"), if (count == bufsize) continue; - ERROR ((0, 0, _("File %s shrunk by %d bytes, padding with zeros"), - p, sizeleft)); - goto padit; /* short read */ + else + { + char buf[UINTMAX_STRSIZE_BOUND]; + ERROR ((0, 0, + _("File %s shrunk by %s bytes, padding with zeros"), + p, STRINGIFY_BIGINT (sizeleft, buf))); + goto padit; /* short read */ + } } if (multi_volume_option) @@ -1181,9 +1254,9 @@ Read error at byte %ld, reading %d bytes, in file %s"), DIR *directory; struct dirent *entry; char *namebuf; - int buflen; - int len; - int our_device = current_stat.st_dev; + size_t buflen; + size_t len; + dev_t our_device = current_stat.st_dev; /* If this tar program is installed suid root, like for Amanda, the access might look like denied, while it is not really. @@ -1204,8 +1277,8 @@ Read error at byte %ld, reading %d bytes, in file %s"), len = strlen (p); buflen = len + NAME_FIELD_SIZE; - namebuf = xmalloc ((size_t) (buflen + 1)); - strncpy (namebuf, p, (size_t) buflen); + namebuf = xmalloc (buflen + 1); + strncpy (namebuf, p, buflen); while (len >= 1 && namebuf[len - 1] == '/') len--; namebuf[len++] = '/'; @@ -1254,25 +1327,25 @@ Read error at byte %ld, reading %d bytes, in file %s"), if (incremental_option && gnu_list_name->dir_contents) { - int sizeleft; - int totsize; - int bufsize; + off_t sizeleft; + off_t totsize; + size_t bufsize; union block *start; - int count; - char *buffer, *p_buffer; + ssize_t count; + const char *buffer, *p_buffer; buffer = gnu_list_name->dir_contents; /* FOO */ totsize = 0; for (p_buffer = buffer; p_buffer && *p_buffer;) { - int tmp; + size_t tmp; tmp = strlen (p_buffer) + 1; totsize += tmp; p_buffer += tmp; } totsize++; - to_oct ((long) totsize, 1 + 12, header->header.size); + OFF_TO_OCT (totsize, header->header.size); finish_header (header); p_buffer = buffer; sizeleft = totsize; @@ -1294,7 +1367,7 @@ Read error at byte %ld, reading %d bytes, in file %s"), memset (start->buffer + sizeleft, 0, (size_t) (BLOCKSIZE - count)); } - memcpy (start->buffer, p_buffer, (size_t) bufsize); + memcpy (start->buffer, p_buffer, bufsize); sizeleft -= bufsize; p_buffer += bufsize; set_next_block_after (start + (bufsize - 1) / BLOCKSIZE); @@ -1351,7 +1424,7 @@ Read error at byte %ld, reading %d bytes, in file %s"), if ((int) NAMLEN (entry) + len >= buflen) { buflen = len + NAMLEN (entry); - namebuf = (char *) xrealloc (namebuf, (size_t) (buflen + 1)); + namebuf = (char *) xrealloc (namebuf, buflen + 1); #if 0 namebuf[len] = '\0'; ERROR ((0, 0, _("File name %s%s too long"), @@ -1413,10 +1486,8 @@ Read error at byte %ld, reading %d bytes, in file %s"), #if defined(S_IFBLK) || defined(S_IFCHR) if (type != FIFOTYPE) { - to_oct ((long) major (current_stat.st_rdev), 8, - header->header.devmajor); - to_oct ((long) minor (current_stat.st_rdev), 8, - header->header.devminor); + MAJOR_TO_OCT (major (current_stat.st_rdev), header->header.devmajor); + MINOR_TO_OCT (minor (current_stat.st_rdev), header->header.devminor); } #endif -- 2.44.0