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-rw-r--r--lib/libalpm/conflict.c225
1 files changed, 123 insertions, 102 deletions
diff --git a/lib/libalpm/conflict.c b/lib/libalpm/conflict.c
index 27558565..bdaa0035 100644
--- a/lib/libalpm/conflict.c
+++ b/lib/libalpm/conflict.c
@@ -247,14 +247,74 @@ static alpm_list_t *chk_fileconflicts(alpm_list_t *filesA, alpm_list_t *filesB)
return(ret);
}
-alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root, alpm_list_t **skip_list)
+/* Returns a alpm_list_t* of files that are in filesA but *NOT* in filesB
+ * This is an 'A minus B' set operation
+ * Pre-condition: both lists are sorted!
+ */
+static alpm_list_t *chk_filedifference(alpm_list_t *filesA, alpm_list_t *filesB)
+{
+ alpm_list_t *ret = NULL;
+ alpm_list_t *pA = filesA, *pB = filesB;
+
+ while(pA && pB) {
+ const char *strA = pA->data;
+ const char *strB = pB->data;
+ /* skip directories, we don't care about dir conflicts */
+ if(strA[strlen(strA)-1] == '/') {
+ pA = pA->next;
+ } else if(strB[strlen(strB)-1] == '/') {
+ pB = pB->next;
+ } else {
+ int cmp = strcmp(strA, strB);
+ if(cmp < 0) {
+ /* item only in filesA, record it */
+ ret = alpm_list_add(ret, strdup(strA));
+ pA = pA->next;
+ } else if(cmp > 0) {
+ /* item only in fileB, but this means nothing */
+ pB = pB->next;
+ } else {
+ /* item in both, ignore it */
+ pA = pA->next;
+ pB = pB->next;
+ }
+ }
+ }
+ for(alpm_list_t *i = ret; i; i = i->next) {
+ _alpm_log(PM_LOG_DEBUG, "found conflict = %s", i->data);
+ }
+ return(ret);
+}
+
+/* Adds a PM_CONFLICT_TYPE_FILE to a conflicts list.
+ * Pass the conflicts list, package name, and a file string of the conflict.
+ */
+static alpm_list_t *add_fileconflict(alpm_list_t *conflicts, char *name,
+ char *filestr)
+{
+ pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
+ if(conflict == NULL) {
+ _alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
+ sizeof(pmconflict_t));
+ return(conflicts);
+ }
+ conflict->type = PM_CONFLICT_TYPE_FILE;
+ STRNCPY(conflict->target, name, PKG_NAME_LEN);
+ STRNCPY(conflict->file, filestr, CONFLICT_FILE_LEN);
+ conflict->ctarget[0] = 0;
+ conflicts = alpm_list_add(conflicts, conflict);
+
+ return(conflicts);
+}
+
+alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root,
+ alpm_list_t **skip_list)
{
alpm_list_t *i, *j, *k;
- char *filestr = NULL;
- char path[PATH_MAX+1];
- struct stat buf, buf2;
alpm_list_t *conflicts = NULL;
+ alpm_list_t *tmpfiles = NULL;
alpm_list_t *targets = trans->packages;
+ int numtargs = alpm_list_count(targets);
double percent;
ALPM_LOG_FUNC;
@@ -262,17 +322,25 @@ alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root, a
if(db == NULL || targets == NULL || root == NULL) {
return(NULL);
}
- /* CHECK 1: check every target against every target */
+
for(i = targets; i; i = i->next) {
- pmpkg_t *p1 = (pmpkg_t*)i->data;
- percent = (double)(alpm_list_count(targets) - alpm_list_count(i) + 1) / alpm_list_count(targets);
- PROGRESS(trans, PM_TRANS_PROGRESS_CONFLICTS_START, "", (percent * 100), alpm_list_count(targets), (alpm_list_count(targets) - alpm_list_count(i) +1));
+ pmpkg_t *p1, *p2, *dbpkg;
+ char *filestr = NULL;
+ char path[PATH_MAX+1];
+ struct stat buf;
+
+ p1 = (pmpkg_t*)i->data;
+ percent = (double)(alpm_list_count(targets) - alpm_list_count(i) + 1)
+ / alpm_list_count(targets);
+ PROGRESS(trans, PM_TRANS_PROGRESS_CONFLICTS_START, "", (percent * 100),
+ numtargs, (numtargs - alpm_list_count(i) +1));
+ /* CHECK 1: check every target against every target */
for(j = i->next; j; j = j->next) {
- pmpkg_t *p2 = (pmpkg_t*)j->data;
- alpm_list_t *conffiles = chk_fileconflicts(p1->files, p2->files);
+ p2 = (pmpkg_t*)j->data;
+ tmpfiles = chk_fileconflicts(p1->files, p2->files);
- if(conffiles) {
- for(k = conffiles; k; k = k->next) {
+ if(tmpfiles) {
+ for(k = tmpfiles; k; k = k->next) {
pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
if(conflict == NULL) {
_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
@@ -285,104 +353,57 @@ alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root, a
STRNCPY(conflict->ctarget, p2->name, PKG_NAME_LEN);
conflicts = alpm_list_add(conflicts, conflict);
}
+ alpm_list_free_inner(tmpfiles, &free);
+ alpm_list_free(tmpfiles);
}
}
/* CHECK 2: check every target against the filesystem */
- 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);
- /* 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;
- /* 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;
- } else {
- if(dbpkg == NULL) {
- dbpkg = _alpm_db_get_pkgfromcache(db, p->name);
- }
- if(dbpkg && !(dbpkg->infolevel & INFRQ_FILES)) {
- _alpm_log(PM_LOG_DEBUG, _("loading FILES info for '%s'"), dbpkg->name);
- _alpm_db_read(db, INFRQ_FILES, dbpkg);
- }
- if(dbpkg && alpm_list_find_str(dbpkg->files, j->data)) {
- 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;
- }
- }
- }
- /* 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 = _alpm_db_get_pkgfromcache(db, p1->name);
- if(dbpkg2 && !(dbpkg2->infolevel & INFRQ_FILES)) {
- _alpm_log(PM_LOG_DEBUG, _("loading FILES info for '%s'"), dbpkg2->name);
- _alpm_db_read(db, INFRQ_FILES, dbpkg2);
- }
- /* If it used to exist in there, but doesn't anymore */
- if(dbpkg2 && !alpm_list_find_str(p1->files, filestr)
- && alpm_list_find_str(dbpkg2->files, filestr)) {
- 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 = alpm_list_add(*skip_list, strdup(filestr));
- }
+ dbpkg = _alpm_db_get_pkgfromcache(db, p1->name);
+
+ /* Do two different checks here. f the package is currently installed,
+ * then only check files that are new in the new package. If the package
+ * is not currently installed, then simply stat the whole filelist */
+ if(dbpkg) {
+ /* older ver of package currently installed */
+ tmpfiles = chk_filedifference(p1->files, alpm_pkg_get_files(dbpkg));
+ for(j = tmpfiles; j; j = j->next) {
+ filestr = j->data;
+
+ snprintf(path, PATH_MAX, "%s%s", root, filestr);
+
+ /* stat the file - if it exists and is not a dir, do some checks */
+ if(lstat(path, &buf) == 0 && !S_ISDIR(buf.st_mode)) {
+ /* Look at all the targets to see if file has changed hands */
+ for(k = targets; k; k = k->next) {
+ pmpkg_t *p2 = (pmpkg_t *)k->data;
+ /* Ensure we aren't looking at current package */
+ if(strcmp(p2->name, p1->name)) {
+ pmpkg_t *localp2 = _alpm_db_get_pkgfromcache(db, p2->name);
+ /* Check if it used to exist in a package, but doesn't anymore */
+ if(localp2 && !alpm_list_find_str(alpm_pkg_get_files(p2), filestr)
+ && alpm_list_find_str(alpm_pkg_get_files(localp2), filestr)) {
+ *skip_list = alpm_list_add(*skip_list, strdup(filestr));
+ } else {
+ conflicts = add_fileconflict(conflicts, p1->name, filestr);
+ break;
}
}
}
}
- if(!ok) {
- pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
- if(conflict == NULL) {
- _alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
- sizeof(pmconflict_t));
- continue;
- }
- conflict->type = PM_CONFLICT_TYPE_FILE;
- STRNCPY(conflict->target, p->name, PKG_NAME_LEN);
- STRNCPY(conflict->file, filestr, CONFLICT_FILE_LEN);
- conflict->ctarget[0] = 0;
- conflicts = alpm_list_add(conflicts, conflict);
+ }
+ alpm_list_free_inner(tmpfiles, &free);
+ alpm_list_free(tmpfiles);
+ } else {
+ /* no version of package currently installed */
+ for(j = p1->files; j; j = j->next) {
+ filestr = j->data;
+
+ snprintf(path, PATH_MAX, "%s%s", root, filestr);
+
+ /* stat the file - if it exists and is not a dir, report a conflict */
+ if(lstat(path, &buf) == 0 && !S_ISDIR(buf.st_mode)) {
+ conflicts = add_fileconflict(conflicts, p1->name, filestr);
}
}
}

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