diff options
Diffstat (limited to 'src/login/logind-acl.c')
-rw-r--r-- | src/login/logind-acl.c | 292 |
1 files changed, 0 insertions, 292 deletions
diff --git a/src/login/logind-acl.c b/src/login/logind-acl.c deleted file mode 100644 index 0cef88a82d..0000000000 --- a/src/login/logind-acl.c +++ /dev/null @@ -1,292 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2011 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 <errno.h> -#include <string.h> - -#include "acl-util.h" -#include "alloc-util.h" -#include "dirent-util.h" -#include "escape.h" -#include "fd-util.h" -#include "formats-util.h" -#include "logind-acl.h" -#include "set.h" -#include "string-util.h" -#include "udev-util.h" -#include "util.h" - -static int flush_acl(acl_t acl) { - acl_entry_t i; - int found; - bool changed = false; - - assert(acl); - - for (found = acl_get_entry(acl, ACL_FIRST_ENTRY, &i); - found > 0; - found = acl_get_entry(acl, ACL_NEXT_ENTRY, &i)) { - - acl_tag_t tag; - - if (acl_get_tag_type(i, &tag) < 0) - return -errno; - - if (tag != ACL_USER) - continue; - - if (acl_delete_entry(acl, i) < 0) - return -errno; - - changed = true; - } - - if (found < 0) - return -errno; - - return changed; -} - -int devnode_acl(const char *path, - bool flush, - bool del, uid_t old_uid, - bool add, uid_t new_uid) { - - acl_t acl; - int r = 0; - bool changed = false; - - assert(path); - - acl = acl_get_file(path, ACL_TYPE_ACCESS); - if (!acl) - return -errno; - - if (flush) { - - r = flush_acl(acl); - if (r < 0) - goto finish; - if (r > 0) - changed = true; - - } else if (del && old_uid > 0) { - acl_entry_t entry; - - r = acl_find_uid(acl, old_uid, &entry); - if (r < 0) - goto finish; - - if (r > 0) { - if (acl_delete_entry(acl, entry) < 0) { - r = -errno; - goto finish; - } - - changed = true; - } - } - - if (add && new_uid > 0) { - acl_entry_t entry; - acl_permset_t permset; - int rd, wt; - - r = acl_find_uid(acl, new_uid, &entry); - if (r < 0) - goto finish; - - if (r == 0) { - if (acl_create_entry(&acl, &entry) < 0) { - r = -errno; - goto finish; - } - - if (acl_set_tag_type(entry, ACL_USER) < 0 || - acl_set_qualifier(entry, &new_uid) < 0) { - r = -errno; - goto finish; - } - } - - if (acl_get_permset(entry, &permset) < 0) { - r = -errno; - goto finish; - } - - rd = acl_get_perm(permset, ACL_READ); - if (rd < 0) { - r = -errno; - goto finish; - } - - wt = acl_get_perm(permset, ACL_WRITE); - if (wt < 0) { - r = -errno; - goto finish; - } - - if (!rd || !wt) { - - if (acl_add_perm(permset, ACL_READ|ACL_WRITE) < 0) { - r = -errno; - goto finish; - } - - changed = true; - } - } - - if (!changed) - goto finish; - - if (acl_calc_mask(&acl) < 0) { - r = -errno; - goto finish; - } - - if (acl_set_file(path, ACL_TYPE_ACCESS, acl) < 0) { - r = -errno; - goto finish; - } - - r = 0; - -finish: - acl_free(acl); - - return r; -} - -int devnode_acl_all(struct udev *udev, - const char *seat, - bool flush, - bool del, uid_t old_uid, - bool add, uid_t new_uid) { - - _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; - struct udev_list_entry *item = NULL, *first = NULL; - _cleanup_set_free_free_ Set *nodes = NULL; - _cleanup_closedir_ DIR *dir = NULL; - struct dirent *dent; - Iterator i; - char *n; - int r; - - assert(udev); - - nodes = set_new(&string_hash_ops); - if (!nodes) - return -ENOMEM; - - e = udev_enumerate_new(udev); - if (!e) - return -ENOMEM; - - if (isempty(seat)) - seat = "seat0"; - - /* We can only match by one tag in libudev. We choose - * "uaccess" for that. If we could match for two tags here we - * could add the seat name as second match tag, but this would - * be hardly optimizable in libudev, and hence checking the - * second tag manually in our loop is a good solution. */ - r = udev_enumerate_add_match_tag(e, "uaccess"); - if (r < 0) - return r; - - r = udev_enumerate_add_match_is_initialized(e); - if (r < 0) - return r; - - r = udev_enumerate_scan_devices(e); - if (r < 0) - return r; - - first = udev_enumerate_get_list_entry(e); - udev_list_entry_foreach(item, first) { - _cleanup_udev_device_unref_ struct udev_device *d = NULL; - const char *node, *sn; - - d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); - if (!d) - return -ENOMEM; - - sn = udev_device_get_property_value(d, "ID_SEAT"); - if (isempty(sn)) - sn = "seat0"; - - if (!streq(seat, sn)) - continue; - - node = udev_device_get_devnode(d); - /* In case people mistag devices with nodes, we need to ignore this */ - if (!node) - continue; - - n = strdup(node); - if (!n) - return -ENOMEM; - - log_debug("Found udev node %s for seat %s", n, seat); - r = set_consume(nodes, n); - if (r < 0) - return r; - } - - /* udev exports "dead" device nodes to allow module on-demand loading, - * these devices are not known to the kernel at this moment */ - dir = opendir("/run/udev/static_node-tags/uaccess"); - if (dir) { - FOREACH_DIRENT(dent, dir, return -errno) { - _cleanup_free_ char *unescaped_devname = NULL; - - if (cunescape(dent->d_name, UNESCAPE_RELAX, &unescaped_devname) < 0) - return -ENOMEM; - - n = strappend("/dev/", unescaped_devname); - if (!n) - return -ENOMEM; - - log_debug("Found static node %s for seat %s", n, seat); - r = set_consume(nodes, n); - if (r == -EEXIST) - continue; - if (r < 0) - return r; - } - } - - r = 0; - SET_FOREACH(n, nodes, i) { - int k; - - log_debug("Changing ACLs at %s for seat %s (uid "UID_FMT"→"UID_FMT"%s%s)", - n, seat, old_uid, new_uid, - del ? " del" : "", add ? " add" : ""); - - k = devnode_acl(n, flush, del, old_uid, add, new_uid); - if (k == -ENOENT) - log_debug("Device %s disappeared while setting ACLs", n); - else if (k < 0 && r == 0) - r = k; - } - - return r; -} |