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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,191 @@ | ||
| /* liblxcapi | ||
| * | ||
| * Copyright © 2021 Christian Brauner <christian.brauner@ubuntu.com>. | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License version 2, as | ||
| * published by the Free Software Foundation. | ||
| * | ||
| * This program 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 General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License along | ||
| * with this program; if not, write to the Free Software Foundation, Inc., | ||
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| */ | ||
|
|
||
| #include "config.h" | ||
|
|
||
| #include <errno.h> | ||
| #include <fcntl.h> | ||
| #include <inttypes.h> | ||
| #include <signal.h> | ||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
| #include <unistd.h> | ||
| #include <sys/stat.h> | ||
| #include <sys/types.h> | ||
| #include <sys/wait.h> | ||
|
|
||
| #include "lxccontainer.h" | ||
| #include "attach_options.h" | ||
|
|
||
| #include "caps.h" | ||
| #include "lxctest.h" | ||
| #include "utils.h" | ||
|
|
||
| #if HAVE_LIBCAP | ||
| static int capabilities_allow(void *payload) | ||
| { | ||
| int last_cap; | ||
|
|
||
| last_cap = lxc_caps_last_cap(); | ||
| for (int cap = 0; cap <= last_cap; cap++) { | ||
| bool bret; | ||
|
|
||
| if (cap == CAP_MKNOD) | ||
| bret = cap_get_bound(cap) == CAP_SET; | ||
| else | ||
| bret = cap_get_bound(cap) != CAP_SET; | ||
| if (!bret) { | ||
| lxc_error("Capability %d unexpectedly raised or lowered\n", cap); | ||
| return EXIT_FAILURE; | ||
| } | ||
| } | ||
|
|
||
| return EXIT_SUCCESS; | ||
| } | ||
|
|
||
| int main(int argc, char *argv[]) | ||
| { | ||
| __do_close int fd_log = -EBADF; | ||
| int fret = EXIT_FAILURE; | ||
| lxc_attach_options_t attach_options = LXC_ATTACH_OPTIONS_DEFAULT; | ||
| int ret; | ||
| pid_t pid; | ||
| struct lxc_container *c; | ||
| struct lxc_log log; | ||
| char template[sizeof(P_tmpdir"/capabilities_allow_XXXXXX")]; | ||
|
|
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| (void)strlcpy(template, P_tmpdir"/capabilities_allow_XXXXXX", sizeof(template)); | ||
|
|
||
| fd_log = lxc_make_tmpfile(template, false); | ||
| if (fd_log < 0) { | ||
| lxc_error("%s", "Failed to create temporary log file for container \"capabilities-allow\""); | ||
| exit(fret); | ||
| } | ||
|
|
||
| log.name = "capabilities-allow"; | ||
| log.file = template; | ||
| log.level = "TRACE"; | ||
| log.prefix = "capabilities"; | ||
| log.quiet = false; | ||
| log.lxcpath = NULL; | ||
|
|
||
| if (lxc_log_init(&log)) | ||
| exit(fret); | ||
|
|
||
| c = lxc_container_new("capabilities-allow", NULL); | ||
| if (!c) { | ||
| lxc_error("%s\n", "Failed to create container \"capabilities-allow\""); | ||
| exit(fret); | ||
| } | ||
|
|
||
| if (c->is_defined(c)) { | ||
| lxc_error("%s\n", "Container \"capabilities-allow\" is defined"); | ||
| goto on_error_put; | ||
| } | ||
|
|
||
| if (!c->createl(c, "busybox", NULL, NULL, 0, NULL)) { | ||
| lxc_error("%s\n", "Failed to create busybox container \"capabilities-allow\""); | ||
| goto on_error_put; | ||
| } | ||
|
|
||
| if (!c->is_defined(c)) { | ||
| lxc_error("%s\n", "Container \"capabilities-allow\" is not defined"); | ||
| goto on_error_destroy; | ||
| } | ||
|
|
||
| if (!c->clear_config_item(c, "lxc.cap.drop")) { | ||
| lxc_error("%s\n", "Failed to clear config item \"lxc.cap.drop\""); | ||
| goto on_error_destroy; | ||
| } | ||
|
|
||
| if (!c->clear_config_item(c, "lxc.cap.keep")) { | ||
| lxc_error("%s\n", "Failed to clear config item \"lxc.cap.drop\""); | ||
| goto on_error_destroy; | ||
| } | ||
|
|
||
| if (!c->set_config_item(c, "lxc.cap.keep", "mknod")) { | ||
| lxc_error("%s\n", "Failed to set config item \"lxc.cap.keep=mknod\""); | ||
| goto on_error_destroy; | ||
| } | ||
|
|
||
| if (!c->want_daemonize(c, true)) { | ||
| lxc_error("%s\n", "Failed to mark container \"capabilities-allow\" daemonized"); | ||
| goto on_error_destroy; | ||
| } | ||
|
|
||
| if (!c->startl(c, 0, NULL)) { | ||
| lxc_error("%s\n", "Failed to start container \"capabilities-allow\" daemonized"); | ||
| goto on_error_destroy; | ||
| } | ||
|
|
||
| ret = c->attach(c, capabilities_allow, NULL, &attach_options, &pid); | ||
| if (ret < 0) { | ||
| lxc_error("%s\n", "Failed to run function in container \"capabilities-allow\""); | ||
| goto on_error_stop; | ||
| } | ||
|
|
||
| ret = wait_for_pid(pid); | ||
| if (ret) { | ||
| lxc_error("%s\n", "Function \"capabilities-allow\" failed"); | ||
| goto on_error_stop; | ||
| } | ||
|
|
||
| fret = 0; | ||
|
|
||
| on_error_stop: | ||
| if (c->is_running(c) && !c->stop(c)) | ||
| lxc_error("%s\n", "Failed to stop container \"capabilities-allow\""); | ||
|
|
||
| on_error_destroy: | ||
| if (!c->destroy(c)) | ||
| lxc_error("%s\n", "Failed to destroy container \"capabilities-allow\""); | ||
|
|
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| on_error_put: | ||
| lxc_container_put(c); | ||
|
|
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| if (fret == EXIT_SUCCESS) { | ||
| lxc_debug("%s\n", "All capability allow tests passed"); | ||
| } else { | ||
| int fd; | ||
|
|
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| fd = open(template, O_RDONLY); | ||
| if (fd >= 0) { | ||
| char buf[4096]; | ||
| ssize_t buflen; | ||
| while ((buflen = read(fd, buf, 1024)) > 0) { | ||
| buflen = write(STDERR_FILENO, buf, buflen); | ||
| if (buflen <= 0) | ||
| break; | ||
| } | ||
| close(fd); | ||
| } | ||
| } | ||
| (void)unlink(template); | ||
|
|
||
| exit(fret); | ||
| } | ||
|
|
||
| #else /* !HAVE_LIBCAP */ | ||
|
|
||
| int main(int argc, char *argv[]) | ||
| { | ||
| lxc_debug("%s\n", "Capabilities not supported. Skipping."); | ||
| exit(EXIT_SUCCESS); | ||
| } | ||
| #endif |