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(tar_read_header): minor optimization. 

Calculate length of file and link name if that is really needed.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
This commit is contained in:
Andrew Borodin 2022-04-23 20:03:59 +03:00
parent d4ded63724
commit d4d0fe6019
1 changed files with 12 additions and 5 deletions
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17
src/vfs/tar/tar.c
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@ -903,9 +903,6 @@ tar_read_header (struct vfs_class *me, struct vfs_s_super *archive, size_t * h_s
recent_long_link =
next_long_link != NULL ? next_long_link : g_strndup (header->header.linkname,
sizeof (header->header.linkname));
len = strlen (recent_long_link);
if (len > 1 && IS_PATH_SEP (recent_long_link[len - 1]))
recent_long_link[len - 1] = '\0';
recent_long_name = NULL;
switch (arch->type)
@ -952,13 +949,13 @@ tar_read_header (struct vfs_class *me, struct vfs_s_super *archive, size_t * h_s
}
canonicalize_pathname (recent_long_name);
len = strlen (recent_long_name);
data_position = current_tar_position;
p = strrchr (recent_long_name, PATH_SEP);
if (p == NULL)
{
len = strlen (recent_long_name);
p = recent_long_name;
q = recent_long_name + len; /* "" */
}
@ -977,7 +974,17 @@ tar_read_header (struct vfs_class *me, struct vfs_s_super *archive, size_t * h_s
if (header->header.typeflag == LNKTYPE)
{
inode = vfs_s_find_inode (me, archive, recent_long_link, LINK_NO_FOLLOW, FL_NONE);
if (*recent_long_link == '\0')
inode = NULL;
else
{
len = strlen (recent_long_link);
if (IS_PATH_SEP (recent_long_link[len - 1]))
recent_long_link[len - 1] = '\0';
inode = vfs_s_find_inode (me, archive, recent_long_link, LINK_NO_FOLLOW, FL_NONE);
}
if (inode == NULL)
message (D_ERROR, MSG_ERROR, _("Inconsistent tar archive"));
else