diff options
author | Anthony G. Basile <blueness@gentoo.org> | 2012-11-15 10:33:16 -0500 |
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committer | Anthony G. Basile <blueness@gentoo.org> | 2012-11-15 10:33:16 -0500 |
commit | 7d4a62f8c1404ed426500b97af03d4ef8d034a71 (patch) | |
tree | 2436cd4f0460a3a3d589875d4ffba55556f3c582 /src/shared/label.c | |
parent | 2944f347d087ff24ec808e4b70fe104a772a97a0 (diff) |
Isolation of udev code from remaining systemd
This commit is a first attempt to isolate the udev code from the
remaining code base. It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed. This is a sweeping commit which may easily have
missed needed code. Files can be retrieved by doing a checkout
from the previous commit:
git checkout 2944f347d0 -- <filename>
Diffstat (limited to 'src/shared/label.c')
-rw-r--r-- | src/shared/label.c | 382 |
1 files changed, 0 insertions, 382 deletions
diff --git a/src/shared/label.c b/src/shared/label.c deleted file mode 100644 index d353da57ec..0000000000 --- a/src/shared/label.c +++ /dev/null @@ -1,382 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2010 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 <sys/stat.h> -#include <unistd.h> -#include <malloc.h> -#include <sys/socket.h> -#include <sys/un.h> - -#include "label.h" -#include "util.h" -#include "path-util.h" - -#ifdef HAVE_SELINUX -#include "selinux-util.h" -#include <selinux/selinux.h> -#include <selinux/label.h> - -static struct selabel_handle *label_hnd = NULL; - -#endif - -int label_init(const char *prefix) { - int r = 0; - -#ifdef HAVE_SELINUX - usec_t before_timestamp, after_timestamp; - struct mallinfo before_mallinfo, after_mallinfo; - - if (!use_selinux()) - return 0; - - if (label_hnd) - return 0; - - before_mallinfo = mallinfo(); - before_timestamp = now(CLOCK_MONOTONIC); - - if (prefix) { - struct selinux_opt options[] = { - { .type = SELABEL_OPT_SUBSET, .value = prefix }, - }; - - label_hnd = selabel_open(SELABEL_CTX_FILE, options, ELEMENTSOF(options)); - } else - label_hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0); - - if (!label_hnd) { - log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG, - "Failed to initialize SELinux context: %m"); - r = security_getenforce() == 1 ? -errno : 0; - } else { - char timespan[FORMAT_TIMESPAN_MAX]; - int l; - - after_timestamp = now(CLOCK_MONOTONIC); - after_mallinfo = mallinfo(); - - l = after_mallinfo.uordblks > before_mallinfo.uordblks ? after_mallinfo.uordblks - before_mallinfo.uordblks : 0; - - log_debug("Successfully loaded SELinux database in %s, size on heap is %iK.", - format_timespan(timespan, sizeof(timespan), after_timestamp - before_timestamp), - (l+1023)/1024); - } -#endif - - return r; -} - -int label_fix(const char *path, bool ignore_enoent, bool ignore_erofs) { - int r = 0; - -#ifdef HAVE_SELINUX - struct stat st; - security_context_t fcon; - - if (!use_selinux() || !label_hnd) - return 0; - - r = lstat(path, &st); - if (r == 0) { - r = selabel_lookup_raw(label_hnd, &fcon, path, st.st_mode); - - /* If there's no label to set, then exit without warning */ - if (r < 0 && errno == ENOENT) - return 0; - - if (r == 0) { - r = lsetfilecon(path, fcon); - freecon(fcon); - - /* If the FS doesn't support labels, then exit without warning */ - if (r < 0 && errno == ENOTSUP) - return 0; - } - } - - if (r < 0) { - /* Ignore ENOENT in some cases */ - if (ignore_enoent && errno == ENOENT) - return 0; - - if (ignore_erofs && errno == EROFS) - return 0; - - log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG, - "Unable to fix label of %s: %m", path); - r = security_getenforce() == 1 ? -errno : 0; - } -#endif - - return r; -} - -void label_finish(void) { - -#ifdef HAVE_SELINUX - if (use_selinux() && label_hnd) - selabel_close(label_hnd); -#endif -} - -int label_get_create_label_from_exe(const char *exe, char **label) { - - int r = 0; - -#ifdef HAVE_SELINUX - security_context_t mycon = NULL, fcon = NULL; - security_class_t sclass; - - if (!use_selinux()) { - *label = NULL; - return 0; - } - - r = getcon(&mycon); - if (r < 0) - goto fail; - - r = getfilecon(exe, &fcon); - if (r < 0) - goto fail; - - sclass = string_to_security_class("process"); - r = security_compute_create(mycon, fcon, sclass, (security_context_t *) label); - if (r == 0) - log_debug("SELinux Socket context for %s will be set to %s", exe, *label); - -fail: - if (r < 0 && security_getenforce() == 1) - r = -errno; - - freecon(mycon); - freecon(fcon); -#endif - - return r; -} - -int label_context_set(const char *path, mode_t mode) { - int r = 0; - -#ifdef HAVE_SELINUX - security_context_t filecon = NULL; - - if (!use_selinux() || !label_hnd) - return 0; - - r = selabel_lookup_raw(label_hnd, &filecon, path, mode); - if (r < 0 && errno != ENOENT) - r = -errno; - else if (r == 0) { - r = setfscreatecon(filecon); - if (r < 0) { - log_error("Failed to set SELinux file context on %s: %m", path); - r = -errno; - } - - freecon(filecon); - } - - if (r < 0 && security_getenforce() == 0) - r = 0; -#endif - - return r; -} - -int label_socket_set(const char *label) { - -#ifdef HAVE_SELINUX - if (!use_selinux()) - return 0; - - if (setsockcreatecon((security_context_t) label) < 0) { - log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG, - "Failed to set SELinux context (%s) on socket: %m", label); - - if (security_getenforce() == 1) - return -errno; - } -#endif - - return 0; -} - -void label_context_clear(void) { - -#ifdef HAVE_SELINUX - if (!use_selinux()) - return; - - setfscreatecon(NULL); -#endif -} - -void label_socket_clear(void) { - -#ifdef HAVE_SELINUX - if (!use_selinux()) - return; - - setsockcreatecon(NULL); -#endif -} - -void label_free(const char *label) { - -#ifdef HAVE_SELINUX - if (!use_selinux()) - return; - - freecon((security_context_t) label); -#endif -} - -int label_mkdir(const char *path, mode_t mode, bool apply) { - - /* Creates a directory and labels it according to the SELinux policy */ -#ifdef HAVE_SELINUX - int r; - security_context_t fcon = NULL; - - if (!apply || !use_selinux() || !label_hnd) - goto skipped; - - if (path_is_absolute(path)) - r = selabel_lookup_raw(label_hnd, &fcon, path, S_IFDIR); - else { - char *newpath; - - newpath = path_make_absolute_cwd(path); - if (!newpath) - return -ENOMEM; - - r = selabel_lookup_raw(label_hnd, &fcon, newpath, S_IFDIR); - free(newpath); - } - - if (r == 0) - r = setfscreatecon(fcon); - - if (r < 0 && errno != ENOENT) { - log_error("Failed to set security context %s for %s: %m", fcon, path); - - if (security_getenforce() == 1) { - r = -errno; - goto finish; - } - } - - r = mkdir(path, mode); - if (r < 0) - r = -errno; - -finish: - setfscreatecon(NULL); - freecon(fcon); - - return r; - -skipped: -#endif - return mkdir(path, mode) < 0 ? -errno : 0; -} - -int label_bind(int fd, const struct sockaddr *addr, socklen_t addrlen) { - - /* Binds a socket and label its file system object according to the SELinux policy */ - -#ifdef HAVE_SELINUX - int r; - security_context_t fcon = NULL; - const struct sockaddr_un *un; - char *path = NULL; - - assert(fd >= 0); - assert(addr); - assert(addrlen >= sizeof(sa_family_t)); - - if (!use_selinux() || !label_hnd) - goto skipped; - - /* Filter out non-local sockets */ - if (addr->sa_family != AF_UNIX) - goto skipped; - - /* Filter out anonymous sockets */ - if (addrlen < sizeof(sa_family_t) + 1) - goto skipped; - - /* Filter out abstract namespace sockets */ - un = (const struct sockaddr_un*) addr; - if (un->sun_path[0] == 0) - goto skipped; - - path = strndup(un->sun_path, addrlen - offsetof(struct sockaddr_un, sun_path)); - if (!path) - return -ENOMEM; - - if (path_is_absolute(path)) - r = selabel_lookup_raw(label_hnd, &fcon, path, S_IFSOCK); - else { - char *newpath; - - newpath = path_make_absolute_cwd(path); - - if (!newpath) { - free(path); - return -ENOMEM; - } - - r = selabel_lookup_raw(label_hnd, &fcon, newpath, S_IFSOCK); - free(newpath); - } - - if (r == 0) - r = setfscreatecon(fcon); - - if (r < 0 && errno != ENOENT) { - log_error("Failed to set security context %s for %s: %m", fcon, path); - - if (security_getenforce() == 1) { - r = -errno; - goto finish; - } - } - - r = bind(fd, addr, addrlen); - if (r < 0) - r = -errno; - -finish: - setfscreatecon(NULL); - freecon(fcon); - free(path); - - return r; - -skipped: -#endif - return bind(fd, addr, addrlen) < 0 ? -errno : 0; -} |