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tar et al: die if bb_copyfd_size copies less than asked for.

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(we have bb_copyfd_exact_size now for that kind of usage)
This commit is contained in:
Denis Vlasenko 2006-12-22 00:21:07 +00:00
parent 0a8a774179
commit 714701c890
13 changed files with 84 additions and 65 deletions
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2
archival/libunarchive/data_extract_all.c
View File

@ -67,7 +67,7 @@ void data_extract_all(archive_handle_t *archive_handle)
/* Regular file */
dst_fd = xopen3(file_header->name, O_WRONLY | O_CREAT | O_EXCL,
file_header->mode);
bb_copyfd_size(archive_handle->src_fd, dst_fd, file_header->size);
bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);
close(dst_fd);
break;
}

3
archival/libunarchive/data_extract_to_buffer.c
View File

@ -10,9 +10,8 @@
void data_extract_to_buffer(archive_handle_t *archive_handle)
{
const unsigned int size = archive_handle->file_header->size;
unsigned int size = archive_handle->file_header->size;
archive_handle->buffer = xzalloc(size + 1);
xread(archive_handle->src_fd, archive_handle->buffer, size);
}

6
archival/libunarchive/data_extract_to_stdout.c
View File

@ -4,9 +4,11 @@
*/
#include "unarchive.h"
#include <unistd.h>
//#include <unistd.h>
void data_extract_to_stdout(archive_handle_t *archive_handle)
{
bb_copyfd_size(archive_handle->src_fd, STDOUT_FILENO, archive_handle->file_header->size);
bb_copyfd_exact_size(archive_handle->src_fd,
STDOUT_FILENO,
archive_handle->file_header->size);
}

3
archival/libunarchive/get_header_ar.c
View File

@ -96,7 +96,8 @@ char get_header_ar(archive_handle_t *archive_handle)
if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) {
archive_handle->action_header(typed);
if (archive_handle->sub_archive) {
while (archive_handle->action_data_subarchive(archive_handle->sub_archive) == EXIT_SUCCESS);
while (archive_handle->action_data_subarchive(archive_handle->sub_archive) == EXIT_SUCCESS)
/* repeat */;
} else {
archive_handle->action_data(archive_handle);
}

2
archival/libunarchive/get_header_tar.c
View File

@ -251,7 +251,7 @@ char get_header_tar(archive_handle_t *archive_handle)
}
/* Strip trailing '/' in directories */
/* Must be done after mode is set as '/' is used to check if its a directory */
/* Must be done after mode is set as '/' is used to check if it's a directory */
cp = last_char_is(file_header->name, '/');
if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) {

5
archival/libunarchive/seek_by_read.c
View File

@ -13,7 +13,6 @@
*/
void seek_by_read(const archive_handle_t *archive_handle, const unsigned int jump_size)
{
if (jump_size) {
bb_copyfd_size(archive_handle->src_fd, -1, jump_size);
}
if (jump_size)
bb_copyfd_exact_size(archive_handle->src_fd, -1, jump_size);
}

26
archival/tar.c
View File

@ -452,26 +452,28 @@ static int writeFileToTarball(const char *fileName, struct stat *statbuf,
/* If it was a regular file, write out the body */
if (inputFileFd >= 0) {
off_t readSize = 0;
/* write the file to the archive */
readSize = bb_copyfd_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
/* readSize < 0 means that error was already reported */
if (readSize != statbuf->st_size && readSize >= 0) {
/* Deadly. We record size into header first, */
size_t readSize;
/* Wwrite the file to the archive. */
/* We record size into header first, */
/* and then write out file. If file shrinks in between, */
/* tar will be corrupted. So bail out. */
/* tar will be corrupted. So we don't allow for that. */
/* NB: GNU tar 1.16 warns and pads with zeroes */
/* or even seeks back and updates header */
bb_error_msg_and_die("short read from %s, aborting", fileName);
}
bb_copyfd_exact_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
////off_t readSize;
////readSize = bb_copyfd_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
////if (readSize != statbuf->st_size && readSize >= 0) {
//// bb_error_msg_and_die("short read from %s, aborting", fileName);
////}
/* Check that file did not grow in between? */
/* if (safe_read(inputFileFd,1) == 1) warn but continue? */
/* if (safe_read(inputFileFd, 1) == 1) warn but continue? */
close(inputFileFd);
/* Pad the file up to the tar block size */
/* (a few tricks here in the name of code size) */
readSize = (-(int)readSize) & (TAR_BLOCK_SIZE-1);
readSize = (-(int)statbuf->st_size) & (TAR_BLOCK_SIZE-1);
memset(bb_common_bufsiz1, 0, readSize);
xwrite(tbInfo->tarFd, bb_common_bufsiz1, readSize);
}

19
archival/unzip.c
View File

@ -54,9 +54,9 @@ typedef union {
static void unzip_skip(int fd, off_t skip)
{
if (lseek(fd, skip, SEEK_CUR) == (off_t)-1) {
if ((errno != ESPIPE) || (bb_copyfd_size(fd, -1, skip) != skip)) {
if (errno != ESPIPE)
bb_error_msg_and_die("seek failure");
}
bb_copyfd_exact_size(fd, -1, skip);
}
}
@ -75,10 +75,8 @@ static int unzip_extract(zip_header_t *zip_header, int src_fd, int dst_fd)
if (zip_header->formatted.method == 0) {
/* Method 0 - stored (not compressed) */
off_t size = zip_header->formatted.ucmpsize;
if (size && (bb_copyfd_size(src_fd, dst_fd, size) != size)) {
bb_error_msg_and_die("cannot complete extraction");
}
if (size)
bb_copyfd_exact_size(src_fd, dst_fd, size);
} else {
/* Method 8 - inflate */
inflate_init(zip_header->formatted.cmpsize);
@ -249,8 +247,8 @@ int unzip_main(int argc, char **argv)
unzip_skip(src_fd, zip_header.formatted.extra_len);
if ((verbosity == v_list) && !list_header_done){
printf(" Length Date Time Name\n"
" -------- ---- ---- ----\n");
puts(" Length Date Time Name\n"
" -------- ---- ---- ----");
list_header_done = 1;
}
@ -274,10 +272,8 @@ int unzip_main(int argc, char **argv)
dst_fn);
total_entries++;
i = 'n';
} else if (dst_fd == STDOUT_FILENO) { /* Extracting to STDOUT */
i = -1;
} else if (last_char_is(dst_fn, '/')) { /* Extract directory */
if (stat(dst_fn, &stat_buf) == -1) {
if (errno != ENOENT) {
@ -304,11 +300,9 @@ int unzip_main(int argc, char **argv)
bb_perror_msg_and_die("cannot stat '%s'",dst_fn);
}
i = 'y';
} else { /* File already exists */
if (overwrite == o_never) {
i = 'n';
} else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
if (overwrite == o_always) {
i = 'y';
@ -319,7 +313,6 @@ int unzip_main(int argc, char **argv)
}
i = key_buf[0];
}
} else { /* File is not regular file */
bb_error_msg_and_die("'%s' exists but is not regular file",dst_fn);
}

3
coreutils/cat.c
View File

@ -25,10 +25,9 @@ int bb_cat(char **argv)
if (f) {
off_t r = bb_copyfd_eof(fileno(f), STDOUT_FILENO);
fclose_if_not_stdin(f);
if (r >= 0) {
if (r >= 0)
continue;
}
}
retval = EXIT_FAILURE;
} while (*++argv);

7
include/libbb.h
View File

@ -203,8 +203,13 @@ extern int recursive_action(const char *fileName, int recurse,
extern int device_open(const char *device, int mode);
extern int get_console_fd(void);
extern char *find_block_device(char *path);
extern off_t bb_copyfd_size(int fd1, int fd2, off_t size);
/* bb_copyfd_XX print read/write errors and return -1 if they occur */
extern off_t bb_copyfd_eof(int fd1, int fd2);
extern off_t bb_copyfd_size(int fd1, int fd2, off_t size);
extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size);
/* "short" copy can be detected by return value < size */
/* this helper yells "short read!" if param is not -1 */
extern void complain_copyfd_and_die(off_t sz) ATTRIBUTE_NORETURN;
extern char bb_process_escape_sequence(const char **ptr);
extern char *bb_get_last_path_component(char *path);
extern int ndelay_on(int fd);

2
include/unarchive.h
View File

@ -24,7 +24,7 @@ typedef struct file_headers_s {
} file_header_t;
typedef struct archive_handle_s {
/* define if the header and data component should processed */
/* define if the header and data component should be processed */
char (*filter)(struct archive_handle_s *);
llist_t *accept;
/* List of files that have been rejected */

30
libbb/copyfd.c
View File

@ -39,7 +39,7 @@ static off_t bb_full_fd_action(int src_fd, int dst_fd, off_t size)
rd = safe_read(src_fd, buffer, size > BUFSIZ ? BUFSIZ : size);
if (!rd) { /* eof - all done. */
if (!rd) { /* eof - all done */
status = 0;
break;
}
@ -56,22 +56,31 @@ static off_t bb_full_fd_action(int src_fd, int dst_fd, off_t size)
}
}
total += rd;
if (status < 0) {
if (status < 0) { /* if we aren't copying till EOF... */
size -= rd;
if (!size) {
/* 'size' bytes copied - all done */
status = 0;
break;
}
}
}
out:
out:
RELEASE_CONFIG_BUFFER(buffer);
return status ? -1 : total;
}
#if 0
void complain_copyfd_and_die(off_t sz)
{
if (sz != -1)
bb_error_msg_and_die("short read");
/* if sz == -1, bb_copyfd_XX already complained */
exit(xfunc_error_retval);
}
#endif
off_t bb_copyfd_size(int fd1, int fd2, off_t size)
{
if (size) {
@ -80,6 +89,17 @@ off_t bb_copyfd_size(int fd1, int fd2, off_t size)
return 0;
}
void bb_copyfd_exact_size(int fd1, int fd2, off_t size)
{
off_t sz = bb_copyfd_size(fd1, fd2, size);
if (sz == size)
return;
if (sz != -1)
bb_error_msg_and_die("short read");
/* if sz == -1, bb_copyfd_XX already complained */
exit(xfunc_error_retval);
}
off_t bb_copyfd_eof(int fd1, int fd2)
{
return bb_full_fd_action(fd1, fd2, 0);

29
networking/ftpgetput.c
View File

@ -22,8 +22,8 @@ typedef struct ftp_host_info_s {
struct sockaddr_in *s_in;
} ftp_host_info_t;
static char verbose_flag = 0;
static char do_continue = 0;
static char verbose_flag;
static char do_continue;
static int ftpcmd(const char *s1, const char *s2, FILE *stream, char *buf)
{
@ -112,7 +112,9 @@ int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
const char *local_path, char *server_path)
{
char buf[512];
off_t filesize = 0;
/* I think 'filesize' usage here is bogus. Let's see... */
//off_t filesize = -1;
#define filesize ((off_t)-1)
int fd_data;
int fd_local = -1;
off_t beg_range = 0;
@ -124,11 +126,10 @@ int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
fd_data = xconnect_ftpdata(server, buf);
if (ftpcmd("SIZE ", server_path, control_stream, buf) == 213) {
filesize = BB_STRTOOFF(buf + 4, NULL, 10);
if (errno || filesize < 0)
bb_error_msg_and_die("SIZE error: %s", buf + 4);
//filesize = BB_STRTOOFF(buf + 4, NULL, 10);
//if (errno || filesize < 0)
// bb_error_msg_and_die("SIZE error: %s", buf + 4);
} else {
filesize = -1;
do_continue = 0;
}
@ -154,7 +155,8 @@ int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
if (ftpcmd(buf, NULL, control_stream, buf) != 350) {
do_continue = 0;
} else {
filesize -= beg_range;
//if (filesize != -1)
// filesize -= beg_range;
}
}
@ -173,11 +175,11 @@ int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
/* Copy the file */
if (filesize != -1) {
if (-1 == bb_copyfd_size(fd_data, fd_local, filesize))
exit(EXIT_FAILURE);
if (bb_copyfd_size(fd_data, fd_local, filesize) == -1)
return EXIT_FAILURE;
} else {
if (-1 == bb_copyfd_eof(fd_data, fd_local))
exit(EXIT_FAILURE);
if (bb_copyfd_eof(fd_data, fd_local) == -1)
return EXIT_FAILURE;
}
/* close it all down */
@ -277,14 +279,11 @@ int ftpgetput_main(int argc, char **argv)
/* content-length of the file */
unsigned opt;
char *port = "ftp";
/* socket to ftp server */
FILE *control_stream;
struct sockaddr_in s_in;
/* continue a prev transfer (-c) */
ftp_host_info_t *server;
int (*ftp_action)(ftp_host_info_t *, FILE *, const char *, char *) = NULL;
/* Check to see if the command is ftpget or ftput */