File paths are resolved if necessary during inter-package conflict checks so that packages carrying the same effective file due to directory symlinks on the filesystem are flagged as conflicting.
Signed-off-by: Allan McRae <al...@archlinux.org> --- Prepare for some ugly... lib/libalpm/conflict.c | 180 ++++++++++++++++++++++++++++++++++- test/pacman/tests/fileconflict001.py | 2 - test/pacman/tests/fileconflict016.py | 2 - test/pacman/tests/fileconflict017.py | 26 +++++ 4 files changed, 204 insertions(+), 6 deletions(-) create mode 100644 test/pacman/tests/fileconflict017.py diff --git a/lib/libalpm/conflict.c b/lib/libalpm/conflict.c index adb4b37..faee7bd 100644 --- a/lib/libalpm/conflict.c +++ b/lib/libalpm/conflict.c @@ -213,6 +213,166 @@ alpm_list_t SYMEXPORT *alpm_checkconflicts(alpm_handle_t *handle, return _alpm_innerconflicts(handle, pkglist); } + +/* Takes a file list and resolves all directory paths + * Pre-condition: list must be sorted! + * If the filelist has no resolving needed, the original list is returned. + * Otherwise the list and will need freed */ +static alpm_filelist_t *resolved_filelist(alpm_handle_t *handle, + alpm_filelist_t *filelist) +{ + size_t i; + struct stat sbuf; + char path[PATH_MAX]; + alpm_filelist_t *resolved; + int list_resolved = 1; + + const char *root = handle->root; + + for(i = 0; i < filelist->count; i++) { + const char *filename = filelist->files[i].name; + + if(filename[strlen(filename)-1] != '/') { + continue; + } + + snprintf(path, PATH_MAX, "%s%s", root, filename); + + if(_alpm_lstat(path, &sbuf) != 0) { + continue; + } + + if(S_ISLNK(sbuf.st_mode)) { + list_resolved = 0; + + resolved = malloc(sizeof(alpm_filelist_t)); + resolved->files = malloc(sizeof(alpm_file_t) * filelist->count); + resolved->count = i; + + break; + } + } + + if(list_resolved == 1) { + return filelist; + } + + /* generate the resolved list */ + char *resolved_root, *resolved_path, *causal_dir, *current_dir; + char resolved_dir[PATH_MAX]; + int resolving = 0, resolved_dir_len; + + for(i = 0; i < resolved->count; i++) { + alpm_file_t *current_file = filelist->files + i; + alpm_file_t *resolved_file = resolved->files + i; + + resolved_file->name = strdup(current_file->name); + resolved_file->size = current_file->size; + resolved_file->mode = current_file->mode; + } + + resolved_root = realpath(root, NULL); + + causal_dir = filelist->files[resolved->count].name; + current_dir = strdup(causal_dir); + snprintf(path, PATH_MAX, "%s%s", root, causal_dir); + resolved_path = realpath(path, NULL); + snprintf(resolved_dir, PATH_MAX, "%s/", resolved_path + strlen(resolved_root) + 1); + resolved->files[resolved->count].name = strdup(resolved_dir); + resolved_dir_len = strlen(resolved_dir); + free(resolved_path); + resolving = 1; + + for(i = resolved->count + 1; i < filelist->count; i++) { + alpm_file_t *current_file = filelist->files + i; + alpm_file_t *resolved_file = resolved->files + i; + char *filename = current_file->name; + + resolved_file->size = current_file->size; + resolved_file->mode = current_file->mode; + + if(filename[strlen(filename) - 1] == '/') { + if(strncmp(filename, causal_dir, strlen(causal_dir)) == 0) { + char *c = filename + strlen(causal_dir) + 1; + // we must resolve path + while((c = strchr(c, '/')) != NULL) { + *c = '\0'; + snprintf(path, PATH_MAX, "%s%s", root, filename); + if(_alpm_lstat(path, &sbuf) != 0) { + *c = '/'; + *(c + 1) = '\0'; + snprintf(path, PATH_MAX, "%s%s", root, current_dir); + break; + } + free(current_dir); + current_dir = strdup(filename); + *c = '/'; + } + resolved_path = realpath(path, NULL); + snprintf(resolved_dir, PATH_MAX, "%s/", resolved_path + strlen(resolved_root) + 1); + resolved->files[resolved->count].name = strdup(resolved_dir); + resolved_dir_len = strlen(resolved_dir); + free(resolved_path); + resolved_file->name = strdup(filename); + continue; + } else { + // test if path needs resolved + snprintf(path, PATH_MAX, "%s%s", root, filename); + if(_alpm_lstat(path, &sbuf) != 0 || !S_ISLNK(sbuf.st_mode)) { + resolved_file->name = strdup(filename); + resolving = 0; + if(current_dir) { + free(current_dir); + current_dir = NULL; + } + resolved_file->name = strdup(filename); + continue; + } + + causal_dir = filename; + current_dir = strdup(causal_dir); + snprintf(path, PATH_MAX, "%s%s", root, causal_dir); + resolved_path = realpath(path, NULL); + snprintf(resolved_dir, PATH_MAX, "%s/", resolved_path + strlen(resolved_root) + 1); + resolved_file->name = strdup(resolved_dir); + resolved_dir_len = strlen(resolved_dir); + free(resolved_path); + resolving = 1; + continue; + } + } + + if(resolving == 0) { + resolved_file->name = strdup(filename); + } else { + size_t len; + filename = filename + strlen(current_dir); + len = resolved_dir_len + strlen(filename) + 1; + resolved_file->name = malloc(len); + snprintf(resolved_file->name, len, "%s%s", resolved_dir, filename); + } + } + + resolved->count = filelist->count; + + if(current_dir) { + free(current_dir); + } + + _alpm_files_msort(resolved->files, resolved->count); + return resolved; +} + +static void free_filelist(alpm_filelist_t *fl) +{ + size_t i; + for(i = 0; i < fl->count; i++) { + free(fl->files[i].name); + } + free(fl->files); + free(fl); +} + /* Returns the difference of the provided two lists of files. * Pre-condition: both lists are sorted! * When done, free the list but NOT the contained data. @@ -481,6 +641,8 @@ alpm_list_t *_alpm_db_find_fileconflicts(alpm_handle_t *handle, alpm_pkg_t *dbpkg; size_t filenum; + alpm_filelist_t *p1_filelist = resolved_filelist(handle, alpm_pkg_get_files(p1)); + int percent = (current * 100) / numtargs; PROGRESS(handle, ALPM_PROGRESS_CONFLICTS_START, "", percent, numtargs, current); @@ -490,8 +652,8 @@ alpm_list_t *_alpm_db_find_fileconflicts(alpm_handle_t *handle, for(j = i->next; j; j = j->next) { alpm_list_t *common_files; alpm_pkg_t *p2 = j->data; - common_files = filelist_intersection(alpm_pkg_get_files(p1), - alpm_pkg_get_files(p2)); + alpm_filelist_t *p2_filelist = resolved_filelist(handle, alpm_pkg_get_files(p2)); + common_files = filelist_intersection(p1_filelist, p2_filelist); if(common_files) { alpm_list_t *k; @@ -503,11 +665,25 @@ alpm_list_t *_alpm_db_find_fileconflicts(alpm_handle_t *handle, if(handle->pm_errno == ALPM_ERR_MEMORY) { FREELIST(conflicts); FREELIST(common_files); + if(p1_filelist != alpm_pkg_get_files(p1)) { + free_filelist(p1_filelist); + } + if(p2_filelist != alpm_pkg_get_files(p2)) { + free_filelist(p2_filelist); + } return NULL; } } alpm_list_free(common_files); } + + if(p2_filelist != alpm_pkg_get_files(p2)) { + free_filelist(p2_filelist); + } + } + + if(p1_filelist != alpm_pkg_get_files(p1)) { + free_filelist(p1_filelist); } /* CHECK 2: check every target against the filesystem */ diff --git a/test/pacman/tests/fileconflict001.py b/test/pacman/tests/fileconflict001.py index e1371f8..b1ad5e1 100644 --- a/test/pacman/tests/fileconflict001.py +++ b/test/pacman/tests/fileconflict001.py @@ -25,5 +25,3 @@ self.addrule("!PKG_EXIST=pkg2") self.addrule("FILE_EXIST=dir/realdir/realfile") self.addrule("!FILE_EXIST=dir/realdir/file") - -self.expectfailure = True diff --git a/test/pacman/tests/fileconflict016.py b/test/pacman/tests/fileconflict016.py index 5625984..c5daf48 100644 --- a/test/pacman/tests/fileconflict016.py +++ b/test/pacman/tests/fileconflict016.py @@ -22,5 +22,3 @@ self.addrule("PACMAN_RETCODE=1") self.addrule("!PKG_EXIST=pkg1") self.addrule("!PKG_EXIST=pkg2") - -self.expectfailure = True diff --git a/test/pacman/tests/fileconflict017.py b/test/pacman/tests/fileconflict017.py new file mode 100644 index 0000000..2df7865 --- /dev/null +++ b/test/pacman/tests/fileconflict017.py @@ -0,0 +1,26 @@ +self.description = "file conflict with same effective path across packages (directory symlink - deep)" + +lp1 = pmpkg("filesystem", "1.0-1") +lp1.files = ["usr/", + "usr/lib/", + "lib -> usr/lib/"] +self.addpkg2db("local", lp1) + +p1 = pmpkg("pkg1") +p1.files = ["lib/", + "lib/foo/", + "lib/foo/bar"] +self.addpkg2db("sync", p1) + +p2 = pmpkg("pkg2") +p2.files = ["usr/", + "usr/lib/", + "usr/lib/foo/", + "usr/lib/foo/bar"] +self.addpkg2db("sync", p2) + +self.args = "-S pkg1 pkg2" + +self.addrule("PACMAN_RETCODE=1") +self.addrule("!PKG_EXIST=pkg1") +self.addrule("!PKG_EXIST=pkg2") -- 1.7.11.2