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authorAndrew Gregory <andrew.gregory.8@gmail.com>2013-03-10 15:34:52 -0400
committerAllan McRae <allan@archlinux.org>2013-06-03 13:33:47 +1000
commitbc3e73fc8f7890d82c78c2ea54a63da440bac147 (patch)
tree5fcb15434014940c09b4828aae0aae5d91b6fde8 /lib
parentc91d9484868f35e17dccc447d8c29cbb7978fb4f (diff)
extract_single_file: consolidate symlink cases
Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/libalpm/add.c56
1 files changed, 17 insertions, 39 deletions
diff --git a/lib/libalpm/add.c b/lib/libalpm/add.c
index 9cbf7670..c20e7c61 100644
--- a/lib/libalpm/add.c
+++ b/lib/libalpm/add.c
@@ -197,30 +197,25 @@ static int extract_single_file(alpm_handle_t *handle, struct archive *archive,
* to get 'right'. Here are the possibilities, with the filesystem
* on the left and the package on the top:
* (F=file, N=node, S=symlink, D=dir)
- * | F/N | S | D
- * non-existent | 1 | 2 | 3
- * F/N | 4 | 5 | 6
- * S | 7 | 8 | 9
- * D | 10 | 11 | 12
+ * | F/N | D
+ * non-existent | 1 | 2
+ * F/N | 3 | 4
+ * D | 5 | 6
*
- * 1,2,3- extract, no magic necessary. lstat (_alpm_lstat) will fail here.
- * 4,5,6,7,8- conflict checks should have caught this. either overwrite
+ * 1,2- extract, no magic necessary. lstat (_alpm_lstat) will fail here.
+ * 3,4- conflict checks should have caught this. either overwrite
* or backup the file.
- * 9- follow the symlink, hopefully it is a directory, check it.
- * 10- file replacing directory- don't allow it.
- * 11- don't extract symlink- a dir exists here. we don't want links to
- * links, etc.
- * 12- skip extraction, dir already exists.
+ * 5- file replacing directory- don't allow it.
+ * 6- skip extraction, dir already exists.
*/
- /* do both a lstat and a stat, so we can see what symlinks point to */
- struct stat lsbuf, sbuf;
- if(_alpm_lstat(filename, &lsbuf) != 0 || stat(filename, &sbuf) != 0) {
- /* cases 1,2,3: couldn't stat an existing file, skip all backup checks */
+ struct stat lsbuf;
+ if(_alpm_lstat(filename, &lsbuf) != 0) {
+ /* cases 1,2: file doesn't exist, skip all backup checks */
} else {
if(S_ISDIR(lsbuf.st_mode)) {
if(S_ISDIR(entrymode)) {
- /* case 12: existing dir, ignore it */
+ /* case 6: existing dir, ignore it */
if(lsbuf.st_mode != entrymode) {
/* if filesystem perms are different than pkg perms, warn user */
mode_t mask = 07777;
@@ -237,33 +232,18 @@ static int extract_single_file(alpm_handle_t *handle, struct archive *archive,
archive_read_data_skip(archive);
return 0;
} else {
- /* case 10/11: trying to overwrite dir with file/symlink, don't allow it */
+ /* case 5: trying to overwrite dir with file, don't allow it */
_alpm_log(handle, ALPM_LOG_ERROR, _("extract: not overwriting dir with file %s\n"),
filename);
archive_read_data_skip(archive);
return 1;
}
- } else if(S_ISLNK(lsbuf.st_mode) && S_ISDIR(entrymode)) {
- /* case 9: existing symlink, dir in package */
- if(S_ISDIR(sbuf.st_mode)) {
- /* the symlink on FS is to a directory, so we'll use it */
- _alpm_log(handle, ALPM_LOG_DEBUG, "extract: skipping symlink overwrite of %s\n",
- filename);
- archive_read_data_skip(archive);
- return 0;
- } else {
- /* this is BAD. symlink was not to a directory */
- _alpm_log(handle, ALPM_LOG_ERROR, _("extract: symlink %s does not point to dir\n"),
- filename);
- archive_read_data_skip(archive);
- return 1;
- }
- } else if(S_ISREG(lsbuf.st_mode) && S_ISDIR(entrymode)) {
- /* case 6: trying to overwrite file with dir */
+ } else if(S_ISDIR(entrymode)) {
+ /* case 4: trying to overwrite file with dir */
_alpm_log(handle, ALPM_LOG_DEBUG, "extract: overwriting file with dir %s\n",
filename);
- } else if(S_ISREG(entrymode)) {
- /* case 4,7: */
+ } else {
+ /* case 3: */
/* if file is in NoUpgrade, don't touch it */
if(alpm_list_find(handle->noupgrade, entryname, _alpm_fnmatch)) {
notouch = 1;
@@ -286,8 +266,6 @@ static int extract_single_file(alpm_handle_t *handle, struct archive *archive,
}
}
}
- /* else if(S_ISLNK(entrymode)) */
- /* case 5,8: don't need to do anything special */
}
/* we need access to the original entryname later after calls to