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rpm: use "create+rename" method of replacing existing files

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Users were reporting getting errors like
"ls: error while loading shared libraries: libc.so.6: ELF load command past end of file"
while rpm was unpacking glibc tarball.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2013-02-20 15:58:42 +01:00
parent 10f5f9b10d
commit 2aec773688
3 changed files with 19 additions and 3 deletions
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15
archival/libarchive/data_extract_all.c
View File

@ -106,15 +106,28 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
switch (file_header->mode & S_IFMT) {
case S_IFREG: {
/* Regular file */
char *dst_name;
int flags = O_WRONLY | O_CREAT | O_EXCL;
if (archive_handle->ah_flags & ARCHIVE_O_TRUNC)
flags = O_WRONLY | O_CREAT | O_TRUNC;
dst_fd = xopen3(file_header->name,
dst_name = file_header->name;
#ifdef ARCHIVE_REPLACE_VIA_RENAME
if (archive_handle->ah_flags & ARCHIVE_REPLACE_VIA_RENAME)
/* rpm-style temp file name */
dst_name = xasprintf("%s;%x", dst_name, (int)getpid());
#endif
dst_fd = xopen3(dst_name,
flags,
file_header->mode
);
bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);
close(dst_fd);
#ifdef ARCHIVE_REPLACE_VIA_RENAME
if (archive_handle->ah_flags & ARCHIVE_REPLACE_VIA_RENAME) {
xrename(dst_name, file_header->name);
free(dst_name);
}
#endif
break;
}
case S_IFDIR:

4
archival/rpm.c
View File

@ -242,8 +242,8 @@ static void extract_cpio(int fd, const char *source_rpm)
/* compat: overwrite existing files.
* try "rpm -i foo.src.rpm" few times in a row -
* standard rpm will not complain.
* (TODO? real rpm creates "file;1234" and then renames it) */
| ARCHIVE_UNLINK_OLD;
*/
| ARCHIVE_REPLACE_VIA_RENAME;
archive_handle->src_fd = fd;
/*archive_handle->offset = 0; - init_handle() did it */

3
include/bb_archive.h
View File

@ -122,6 +122,9 @@ typedef struct archive_handle_t {
#define ARCHIVE_NUMERIC_OWNER (1 << 7)
#define ARCHIVE_O_TRUNC (1 << 8)
#define ARCHIVE_REMEMBER_NAMES (1 << 9)
#if ENABLE_RPM
#define ARCHIVE_REPLACE_VIA_RENAME (1 << 10)
#endif
/* POSIX tar Header Block, from POSIX 1003.1-1990 */