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Other cleanups and documentation.

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Do the checks, then build the filenames. Do not mix both.
This commit is contained in:
nekral-guest 2007-12-28 00:23:33 +00:00
parent 523392dc0b
commit 9a9a9c0414
1 changed files with 27 additions and 30 deletions
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57
libmisc/copydir.c
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@ -109,7 +109,7 @@ static int selinux_file_context (const char *dst_name)
#endif #endif
/* /*
* remove_link - delete a link from the link list * remove_link - delete a link from the linked list
*/ */
static void remove_link (struct link_name *ln) static void remove_link (struct link_name *ln)
{ {
@ -218,38 +218,33 @@ int copy_tree (const char *src_root, const char *dst_root, uid_t uid, gid_t gid)
set_orig++; set_orig++;
} }
while ((0 == err) && (ent = readdir (dir)) != NULL) { while ((0 == err) && (ent = readdir (dir)) != NULL) {
/* /*
* Skip the "." and ".." entries * Skip the "." and ".." entries
*/ */
if ((strcmp (ent->d_name, ".") != 0) &&
(strcmp (ent->d_name, "..") != 0)) {
/*
* Make sure the resulting source and destination
* filenames will fit in their buffers.
*/
if ( (strlen (src_root) + strlen (ent->d_name) + 2 >
sizeof src_name)
|| (strlen (dst_root) + strlen (ent->d_name) + 2 >
sizeof dst_name)) {
err = -1;
} else {
/*
* Build the filename for both the source and
* the destination files.
*/
snprintf (src_name, sizeof src_name, "%s/%s",
src_root, ent->d_name);
snprintf (dst_name, sizeof dst_name, "%s/%s",
dst_root, ent->d_name);
if (strcmp (ent->d_name, ".") == 0 || err = copy_entry (src_name, dst_name, uid, gid);
strcmp (ent->d_name, "..") == 0) { }
continue;
} }
/*
* Make the filename for both the source and the
* destination files.
*/
if (strlen (src_root) + strlen (ent->d_name) + 2 >
sizeof src_name) {
err = -1;
break;
}
snprintf (src_name, sizeof src_name, "%s/%s", src_root,
ent->d_name);
if (strlen (dst_root) + strlen (ent->d_name) + 2 >
sizeof dst_name) {
err = -1;
break;
}
snprintf (dst_name, sizeof dst_name, "%s/%s", dst_root,
ent->d_name);
err = copy_entry (src_name, dst_name, uid, gid);
} }
closedir (dir); closedir (dir);
@ -389,8 +384,8 @@ static int copy_symlink (const char *src, const char *dst,
#endif #endif
if ( (symlink (oldlink, dst) != 0) if ( (symlink (oldlink, dst) != 0)
|| (lchown (dst, || (lchown (dst,
uid == (uid_t) - 1 ? statp->st_uid : uid, (uid == (uid_t) - 1) ? statp->st_uid : uid,
gid == (gid_t) - 1 ? statp->st_gid : gid) != 0)) { (gid == (gid_t) - 1) ? statp->st_gid : gid) != 0)) {
return -1; return -1;
} }
@ -417,6 +412,8 @@ static int copy_hardlink (const char *src, const char *dst,
return -1; return -1;
} }
/* If the file could be unlinked, decrement the links counter,
* and delete the file if it was the last reference */
lp->ln_count--; lp->ln_count--;
if (lp->ln_count <= 0) { if (lp->ln_count <= 0) {
remove_link (lp); remove_link (lp);