diff options
Diffstat (limited to 'src/import/import-util.c')
| -rw-r--r-- | src/import/import-util.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/import/import-util.c b/src/import/import-util.c new file mode 100644 index 0000000000..24c8ac1d13 --- /dev/null +++ b/src/import/import-util.c @@ -0,0 +1,201 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2015 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "util.h" +#include "strv.h" +#include "copy.h" +#include "btrfs-util.h" +#include "import-util.h" + +#define FILENAME_ESCAPE "/.#\"\'" + +bool http_etag_is_valid(const char *etag) { + if (!endswith(etag, "\"")) + return false; + + if (!startswith(etag, "\"") && !startswith(etag, "W/\"")) + return false; + + return true; +} + +int import_find_old_etags(const char *url, const char *image_root, int dt, const char *prefix, const char *suffix, char ***etags) { + _cleanup_free_ char *escaped_url = NULL; + _cleanup_closedir_ DIR *d = NULL; + _cleanup_strv_free_ char **l = NULL; + struct dirent *de; + int r; + + assert(url); + assert(etags); + + if (!image_root) + image_root = "/var/lib/machines"; + + escaped_url = xescape(url, FILENAME_ESCAPE); + if (!escaped_url) + return -ENOMEM; + + d = opendir(image_root); + if (!d) { + if (errno == ENOENT) { + *etags = NULL; + return 0; + } + + return -errno; + } + + FOREACH_DIRENT_ALL(de, d, return -errno) { + const char *a, *b; + char *u; + + if (de->d_type != DT_UNKNOWN && + de->d_type != dt) + continue; + + if (prefix) { + a = startswith(de->d_name, prefix); + if (!a) + continue; + } else + a = de->d_name; + + a = startswith(a, escaped_url); + if (!a) + continue; + + a = startswith(a, "."); + if (!a) + continue; + + if (suffix) { + b = endswith(de->d_name, suffix); + if (!b) + continue; + } else + b = strchr(de->d_name, 0); + + if (a >= b) + continue; + + u = cunescape_length(a, b - a); + if (!u) + return -ENOMEM; + + if (!http_etag_is_valid(u)) { + free(u); + continue; + } + + r = strv_consume(&l, u); + if (r < 0) + return r; + } + + *etags = l; + l = NULL; + + return 0; +} + +int import_make_local_copy(const char *final, const char *image_root, const char *local, bool force_local) { + const char *p; + int r; + + assert(final); + assert(local); + + if (!image_root) + image_root = "/var/lib/machines"; + + p = strappenda(image_root, "/", local); + + if (force_local) { + (void) btrfs_subvol_remove(p); + (void) rm_rf_dangerous(p, false, true, false); + } + + r = btrfs_subvol_snapshot(final, p, false, false); + if (r == -ENOTTY) { + r = copy_tree(final, p, false); + if (r < 0) + return log_error_errno(r, "Failed to copy image: %m"); + } else if (r < 0) + return log_error_errno(r, "Failed to create local image: %m"); + + log_info("Created new local image '%s'.", local); + + return 0; +} + +int import_make_read_only(const char *path) { + int r; + + r = btrfs_subvol_set_read_only(path, true); + if (r == -ENOTTY) { + struct stat st; + + r = stat(path, &st); + if (r < 0) + return log_error_errno(errno, "Failed to stat temporary image: %m"); + + if (chmod(path, st.st_mode & 0755) < 0) + return log_error_errno(errno, "Failed to chmod() final image: %m"); + + return 0; + } + if (r < 0) + return log_error_errno(r, "Failed to mark final image read-only: %m"); + + return 0; +} + +int import_make_path(const char *url, const char *etag, const char *image_root, const char *prefix, const char *suffix, char **ret) { + _cleanup_free_ char *escaped_url = NULL; + char *path; + + assert(url); + assert(ret); + + if (!image_root) + image_root = "/var/lib/machines"; + + escaped_url = xescape(url, FILENAME_ESCAPE); + if (!escaped_url) + return -ENOMEM; + + if (etag) { + _cleanup_free_ char *escaped_etag = NULL; + + escaped_etag = xescape(etag, FILENAME_ESCAPE); + if (!escaped_etag) + return -ENOMEM; + + path = strjoin(image_root, "/", strempty(prefix), escaped_url, ".", escaped_etag, strempty(suffix), NULL); + } else + path = strjoin(image_root, "/", strempty(prefix), escaped_url, strempty(suffix), NULL); + if (!path) + return -ENOMEM; + + *ret = path; + return 0; +} |