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dpkg: fix handling of names with leading dots. Closes bug 783

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-01-08 18:07:33 +01:00
parent 866710a056
commit 6fd42b3d00
1 changed files with 12 additions and 1 deletions
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13
archival/dpkg.c
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@ -1493,7 +1493,18 @@ static void FAST_FUNC data_extract_all_prefix(archive_handle_t *archive_handle)
{ {
char *name_ptr = archive_handle->file_header->name; char *name_ptr = archive_handle->file_header->name;
name_ptr += strspn(name_ptr, "./"); /* Skip all leading "/" */
while (*name_ptr == '/')
name_ptr++;
/* Skip all leading "./" and "../" */
while (name_ptr[0] == '.') {
if (name_ptr[1] == '.' && name_ptr[2] == '/')
name_ptr++;
if (name_ptr[1] != '/')
break;
name_ptr += 2;
}
if (name_ptr[0] != '\0') { if (name_ptr[0] != '\0') {
archive_handle->file_header->name = xasprintf("%s%s", archive_handle->dpkg__buffer, name_ptr); archive_handle->file_header->name = xasprintf("%s%s", archive_handle->dpkg__buffer, name_ptr);
data_extract_all(archive_handle); data_extract_all(archive_handle);