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-rw-r--r--lib/libalpm/conflict.c138
1 files changed, 71 insertions, 67 deletions
diff --git a/lib/libalpm/conflict.c b/lib/libalpm/conflict.c
index 3408c676..1c9cd309 100644
--- a/lib/libalpm/conflict.c
+++ b/lib/libalpm/conflict.c
@@ -31,7 +31,7 @@
#include "util.h"
#include "conflict.h"
-PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root)
+PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root, PMList **skip_list)
{
PMList *i, *j, *k;
char *filestr = NULL;
@@ -44,41 +44,7 @@ PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root)
return(NULL);
}
- /* CHECK 1: check every db package against every target package */
- /* XXX: I've disabled the database-against-targets check for now, as the
- * many many strcmp() calls slow it down heavily and most of the
- * checking is redundant to the targets-against-filesystem check.
- * This will be re-enabled if I can improve performance significantly.
- *
- pmpkg_t *info = NULL;
- char *dbstr = NULL;
- db_rewind(db);
- while((info = db_scan(db, NULL, INFRQ_DESC | INFRQ_FILES)) != NULL) {
- for(i = info->files; i; i = i->next) {
- if(i->data == NULL) continue;
- dbstr = (char*)i->data;
- for(j = targets; j; j = j->next) {
- pmpkg_t *targ = (pmpkg_t*)j->data;
- if(strcmp(info->name, targ->name)) {
- for(k = targ->files; k; k = k->next) {
- filestr = (char*)k->data;
- if(!strcmp(dbstr, filestr)) {
- if(rindex(k->data, '/') == filestr+strlen(filestr)-1) {
- continue;
- }
- MALLOC(str, 512);
- snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (installed)", dbstr,
- targ->name, info->name);
- conflicts = pm_list_add(conflicts, str);
- }
- }
- }
- }
- }
- FREEPKG(info);
- }*/
-
- /* CHECK 2: check every target against every target */
+ /* CHECK 1: check every target against every target */
for(i = targets; i; i = i->next) {
pmpkg_t *p1 = (pmpkg_t*)i->data;
for(j = i; j; j = j->next) {
@@ -104,52 +70,90 @@ PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root)
}
}
- /* CHECK 3: check every target against the filesystem */
+ /* CHECK 2: check every target against the filesystem */
for(i = targets; i; i = i->next) {
pmpkg_t *p = (pmpkg_t*)i->data;
pmpkg_t *dbpkg = NULL;
for(j = p->files; j; j = j->next) {
+ int isdir = 0;
filestr = (char*)j->data;
snprintf(path, PATH_MAX, "%s%s", root, filestr);
- if(!stat(path, &buf) && !S_ISDIR(buf.st_mode)) {
+ /* is this target a file or directory? */
+ if(path[strlen(path)-1] == '/') {
+ isdir = 1;
+ path[strlen(path)-1] = '\0';
+ }
+ if(!lstat(path, &buf)) {
int ok = 0;
- if(dbpkg == NULL) {
- dbpkg = db_scan(db, p->name, INFRQ_DESC | INFRQ_FILES);
+ if(!S_ISLNK(buf.st_mode) && ((isdir && !S_ISDIR(buf.st_mode)) || (!isdir && S_ISDIR(buf.st_mode)))) {
+ /* if the package target is a directory, and the filesystem target
+ * is not (or vice versa) then it's a conflict
+ */
+ ok = 0;
+ goto donecheck;
}
- if(dbpkg && pm_list_is_strin(j->data, dbpkg->files)) {
+ /* re-fetch with stat() instead of lstat() */
+ stat(path, &buf);
+ if(S_ISDIR(buf.st_mode)) {
+ /* if it's a directory, then we have no conflict */
ok = 1;
- }
- /* Make sure that the supposedly-conflicting file is not actually just
- * a symlink that points to a path that used to exist in the package.
- */
- /* Check if any part of the conflicting file's path is a symlink */
- if(dbpkg && !ok) {
- char str[PATH_MAX];
- for(k = dbpkg->files; k; k = k->next) {
- snprintf(str, PATH_MAX, "%s%s", root, (char*)k->data);
- stat(str, &buf2);
- if(buf.st_ino == buf2.st_ino) {
- ok = 1;
- }
+ } else {
+ if(dbpkg == NULL) {
+ dbpkg = db_scan(db, p->name, INFRQ_DESC | INFRQ_FILES);
}
- }
- /* Check if the conflicting file has been moved to another package/target */
- if(!ok) {
- /* Look at all the targets */
- for(k = targets; k && !ok; k = k->next) {
- pmpkg_t *p1 = (pmpkg_t *)k->data;
- /* As long as they're not the current package */
- if(strcmp(p1->name, p->name)) {
- pmpkg_t *dbpkg2 = NULL;
- dbpkg2 = db_scan(db, p1->name, INFRQ_DESC | INFRQ_FILES);
- /* If it used to exist in there, but doesn't anymore */
- if(dbpkg2 && !pm_list_is_strin(filestr, p1->files) && pm_list_is_strin(filestr, dbpkg2->files)) {
+ if(dbpkg && pm_list_is_strin(j->data, dbpkg->files)) {
+ ok = 1;
+ }
+ /* Make sure that the supposedly-conflicting file is not actually just
+ * a symlink that points to a path that used to exist in the package.
+ */
+ /* Check if any part of the conflicting file's path is a symlink */
+ if(dbpkg && !ok) {
+ char str[PATH_MAX];
+ for(k = dbpkg->files; k; k = k->next) {
+ snprintf(str, PATH_MAX, "%s%s", root, (char*)k->data);
+ stat(str, &buf2);
+ if(buf.st_ino == buf2.st_ino) {
ok = 1;
}
- FREEPKG(dbpkg2);
+ }
+ }
+ /* Check if the conflicting file has been moved to another package/target */
+ if(!ok) {
+ /* Look at all the targets */
+ for(k = targets; k && !ok; k = k->next) {
+ pmpkg_t *p1 = (pmpkg_t *)k->data;
+ /* As long as they're not the current package */
+ if(strcmp(p1->name, p->name)) {
+ pmpkg_t *dbpkg2 = NULL;
+ dbpkg2 = db_scan(db, p1->name, INFRQ_DESC | INFRQ_FILES);
+ /* If it used to exist in there, but doesn't anymore */
+ if(dbpkg2 && !pm_list_is_strin(filestr, p1->files) && pm_list_is_strin(filestr, dbpkg2->files)) {
+ ok = 1;
+ /* Add to the "skip list" of files that we shouldn't remove during an upgrade.
+ *
+ * This is a workaround for the following scenario:
+ *
+ * - the old package A provides file X
+ * - the new package A does not
+ * - the new package B provides file X
+ * - package A depends on B, so B is upgraded first
+ *
+ * Package B is upgraded, so file X is installed. Then package A
+ * is upgraded, and it *removes* file X, since it no longer exists
+ * in package A.
+ *
+ * Our workaround is to scan through all "old" packages and all "new"
+ * ones, looking for files that jump to different packages.
+ */
+ *skip_list = pm_list_add(*skip_list, filestr);
+ }
+ FREEPKG(dbpkg2);
+ }
}
}
}
+donecheck:
if(!ok) {
MALLOC(str, 512);
snprintf(str, 512, "%s: %s: exists in filesystem", p->name, path);
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-06-02 02:03:21 +0200