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-rw-r--r--src/basic/util.c808
1 files changed, 0 insertions, 808 deletions
diff --git a/src/basic/util.c b/src/basic/util.c
deleted file mode 100644
index 756c663be4..0000000000
--- a/src/basic/util.c
+++ /dev/null
@@ -1,808 +0,0 @@
-/***
- 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 <alloca.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <sched.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-#include <sys/statfs.h>
-#include <sys/sysmacros.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "alloc-util.h"
-#include "build.h"
-#include "def.h"
-#include "dirent-util.h"
-#include "fd-util.h"
-#include "fileio.h"
-#include "formats-util.h"
-#include "hashmap.h"
-#include "hostname-util.h"
-#include "log.h"
-#include "macro.h"
-#include "missing.h"
-#include "parse-util.h"
-#include "path-util.h"
-#include "process-util.h"
-#include "set.h"
-#include "signal-util.h"
-#include "stat-util.h"
-#include "string-util.h"
-#include "strv.h"
-#include "time-util.h"
-#include "umask-util.h"
-#include "user-util.h"
-#include "util.h"
-
-/* Put this test here for a lack of better place */
-assert_cc(EAGAIN == EWOULDBLOCK);
-
-int saved_argc = 0;
-char **saved_argv = NULL;
-
-size_t page_size(void) {
- static thread_local size_t pgsz = 0;
- long r;
-
- if (_likely_(pgsz > 0))
- return pgsz;
-
- r = sysconf(_SC_PAGESIZE);
- assert(r > 0);
-
- pgsz = (size_t) r;
- return pgsz;
-}
-
-static int do_execute(char **directories, usec_t timeout, char *argv[]) {
- _cleanup_hashmap_free_free_ Hashmap *pids = NULL;
- _cleanup_set_free_free_ Set *seen = NULL;
- char **directory;
-
- /* We fork this all off from a child process so that we can
- * somewhat cleanly make use of SIGALRM to set a time limit */
-
- (void) reset_all_signal_handlers();
- (void) reset_signal_mask();
-
- assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
- pids = hashmap_new(NULL);
- if (!pids)
- return log_oom();
-
- seen = set_new(&string_hash_ops);
- if (!seen)
- return log_oom();
-
- STRV_FOREACH(directory, directories) {
- _cleanup_closedir_ DIR *d;
- struct dirent *de;
-
- d = opendir(*directory);
- if (!d) {
- if (errno == ENOENT)
- continue;
-
- return log_error_errno(errno, "Failed to open directory %s: %m", *directory);
- }
-
- FOREACH_DIRENT(de, d, break) {
- _cleanup_free_ char *path = NULL;
- pid_t pid;
- int r;
-
- if (!dirent_is_file(de))
- continue;
-
- if (set_contains(seen, de->d_name)) {
- log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name);
- continue;
- }
-
- r = set_put_strdup(seen, de->d_name);
- if (r < 0)
- return log_oom();
-
- path = strjoin(*directory, "/", de->d_name, NULL);
- if (!path)
- return log_oom();
-
- if (null_or_empty_path(path)) {
- log_debug("%s is empty (a mask).", path);
- continue;
- }
-
- pid = fork();
- if (pid < 0) {
- log_error_errno(errno, "Failed to fork: %m");
- continue;
- } else if (pid == 0) {
- char *_argv[2];
-
- assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
- if (!argv) {
- _argv[0] = path;
- _argv[1] = NULL;
- argv = _argv;
- } else
- argv[0] = path;
-
- execv(path, argv);
- return log_error_errno(errno, "Failed to execute %s: %m", path);
- }
-
- log_debug("Spawned %s as " PID_FMT ".", path, pid);
-
- r = hashmap_put(pids, PID_TO_PTR(pid), path);
- if (r < 0)
- return log_oom();
- path = NULL;
- }
- }
-
- /* Abort execution of this process after the timout. We simply
- * rely on SIGALRM as default action terminating the process,
- * and turn on alarm(). */
-
- if (timeout != USEC_INFINITY)
- alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC);
-
- while (!hashmap_isempty(pids)) {
- _cleanup_free_ char *path = NULL;
- pid_t pid;
-
- pid = PTR_TO_PID(hashmap_first_key(pids));
- assert(pid > 0);
-
- path = hashmap_remove(pids, PID_TO_PTR(pid));
- assert(path);
-
- wait_for_terminate_and_warn(path, pid, true);
- }
-
- return 0;
-}
-
-void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) {
- pid_t executor_pid;
- int r;
- char *name;
- char **dirs = (char**) directories;
-
- assert(!strv_isempty(dirs));
-
- name = basename(dirs[0]);
- assert(!isempty(name));
-
- /* Executes all binaries in the directories in parallel and waits
- * for them to finish. Optionally a timeout is applied. If a file
- * with the same name exists in more than one directory, the
- * earliest one wins. */
-
- executor_pid = fork();
- if (executor_pid < 0) {
- log_error_errno(errno, "Failed to fork: %m");
- return;
-
- } else if (executor_pid == 0) {
- r = do_execute(dirs, timeout, argv);
- _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
- }
-
- wait_for_terminate_and_warn(name, executor_pid, true);
-}
-
-bool plymouth_running(void) {
- return access("/run/plymouth/pid", F_OK) >= 0;
-}
-
-bool display_is_local(const char *display) {
- assert(display);
-
- return
- display[0] == ':' &&
- display[1] >= '0' &&
- display[1] <= '9';
-}
-
-int socket_from_display(const char *display, char **path) {
- size_t k;
- char *f, *c;
-
- assert(display);
- assert(path);
-
- if (!display_is_local(display))
- return -EINVAL;
-
- k = strspn(display+1, "0123456789");
-
- f = new(char, strlen("/tmp/.X11-unix/X") + k + 1);
- if (!f)
- return -ENOMEM;
-
- c = stpcpy(f, "/tmp/.X11-unix/X");
- memcpy(c, display+1, k);
- c[k] = 0;
-
- *path = f;
-
- return 0;
-}
-
-int block_get_whole_disk(dev_t d, dev_t *ret) {
- char *p, *s;
- int r;
- unsigned n, m;
-
- assert(ret);
-
- /* If it has a queue this is good enough for us */
- if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
- return -ENOMEM;
-
- r = access(p, F_OK);
- free(p);
-
- if (r >= 0) {
- *ret = d;
- return 0;
- }
-
- /* If it is a partition find the originating device */
- if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
- return -ENOMEM;
-
- r = access(p, F_OK);
- free(p);
-
- if (r < 0)
- return -ENOENT;
-
- /* Get parent dev_t */
- if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
- return -ENOMEM;
-
- r = read_one_line_file(p, &s);
- free(p);
-
- if (r < 0)
- return r;
-
- r = sscanf(s, "%u:%u", &m, &n);
- free(s);
-
- if (r != 2)
- return -EINVAL;
-
- /* Only return this if it is really good enough for us. */
- if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
- return -ENOMEM;
-
- r = access(p, F_OK);
- free(p);
-
- if (r >= 0) {
- *ret = makedev(m, n);
- return 0;
- }
-
- return -ENOENT;
-}
-
-bool kexec_loaded(void) {
- bool loaded = false;
- char *s;
-
- if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
- if (s[0] == '1')
- loaded = true;
- free(s);
- }
- return loaded;
-}
-
-int prot_from_flags(int flags) {
-
- switch (flags & O_ACCMODE) {
-
- case O_RDONLY:
- return PROT_READ;
-
- case O_WRONLY:
- return PROT_WRITE;
-
- case O_RDWR:
- return PROT_READ|PROT_WRITE;
-
- default:
- return -EINVAL;
- }
-}
-
-int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) {
- bool stdout_is_tty, stderr_is_tty;
- pid_t parent_pid, agent_pid;
- sigset_t ss, saved_ss;
- unsigned n, i;
- va_list ap;
- char **l;
-
- assert(pid);
- assert(path);
-
- /* Spawns a temporary TTY agent, making sure it goes away when
- * we go away */
-
- parent_pid = getpid();
-
- /* First we temporarily block all signals, so that the new
- * child has them blocked initially. This way, we can be sure
- * that SIGTERMs are not lost we might send to the agent. */
- assert_se(sigfillset(&ss) >= 0);
- assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0);
-
- agent_pid = fork();
- if (agent_pid < 0) {
- assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
- return -errno;
- }
-
- if (agent_pid != 0) {
- assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
- *pid = agent_pid;
- return 0;
- }
-
- /* In the child:
- *
- * Make sure the agent goes away when the parent dies */
- if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
- _exit(EXIT_FAILURE);
-
- /* Make sure we actually can kill the agent, if we need to, in
- * case somebody invoked us from a shell script that trapped
- * SIGTERM or so... */
- (void) reset_all_signal_handlers();
- (void) reset_signal_mask();
-
- /* Check whether our parent died before we were able
- * to set the death signal and unblock the signals */
- if (getppid() != parent_pid)
- _exit(EXIT_SUCCESS);
-
- /* Don't leak fds to the agent */
- close_all_fds(except, n_except);
-
- stdout_is_tty = isatty(STDOUT_FILENO);
- stderr_is_tty = isatty(STDERR_FILENO);
-
- if (!stdout_is_tty || !stderr_is_tty) {
- int fd;
-
- /* Detach from stdout/stderr. and reopen
- * /dev/tty for them. This is important to
- * ensure that when systemctl is started via
- * popen() or a similar call that expects to
- * read EOF we actually do generate EOF and
- * not delay this indefinitely by because we
- * keep an unused copy of stdin around. */
- fd = open("/dev/tty", O_WRONLY);
- if (fd < 0) {
- log_error_errno(errno, "Failed to open /dev/tty: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (!stdout_is_tty && dup2(fd, STDOUT_FILENO) < 0) {
- log_error_errno(errno, "Failed to dup2 /dev/tty: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (!stderr_is_tty && dup2(fd, STDERR_FILENO) < 0) {
- log_error_errno(errno, "Failed to dup2 /dev/tty: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (fd > STDERR_FILENO)
- close(fd);
- }
-
- /* Count arguments */
- va_start(ap, path);
- for (n = 0; va_arg(ap, char*); n++)
- ;
- va_end(ap);
-
- /* Allocate strv */
- l = alloca(sizeof(char *) * (n + 1));
-
- /* Fill in arguments */
- va_start(ap, path);
- for (i = 0; i <= n; i++)
- l[i] = va_arg(ap, char*);
- va_end(ap);
-
- execv(path, l);
- _exit(EXIT_FAILURE);
-}
-
-bool in_initrd(void) {
- static int saved = -1;
- struct statfs s;
-
- if (saved >= 0)
- return saved;
-
- /* We make two checks here:
- *
- * 1. the flag file /etc/initrd-release must exist
- * 2. the root file system must be a memory file system
- *
- * The second check is extra paranoia, since misdetecting an
- * initrd can have bad bad consequences due the initrd
- * emptying when transititioning to the main systemd.
- */
-
- saved = access("/etc/initrd-release", F_OK) >= 0 &&
- statfs("/", &s) >= 0 &&
- is_temporary_fs(&s);
-
- return saved;
-}
-
-/* hey glibc, APIs with callbacks without a user pointer are so useless */
-void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
- int (*compar) (const void *, const void *, void *), void *arg) {
- size_t l, u, idx;
- const void *p;
- int comparison;
-
- l = 0;
- u = nmemb;
- while (l < u) {
- idx = (l + u) / 2;
- p = (void *)(((const char *) base) + (idx * size));
- comparison = compar(key, p, arg);
- if (comparison < 0)
- u = idx;
- else if (comparison > 0)
- l = idx + 1;
- else
- return (void *)p;
- }
- return NULL;
-}
-
-int on_ac_power(void) {
- bool found_offline = false, found_online = false;
- _cleanup_closedir_ DIR *d = NULL;
-
- d = opendir("/sys/class/power_supply");
- if (!d)
- return errno == ENOENT ? true : -errno;
-
- for (;;) {
- struct dirent *de;
- _cleanup_close_ int fd = -1, device = -1;
- char contents[6];
- ssize_t n;
-
- errno = 0;
- de = readdir(d);
- if (!de && errno > 0)
- return -errno;
-
- if (!de)
- break;
-
- if (hidden_or_backup_file(de->d_name))
- continue;
-
- device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (device < 0) {
- if (errno == ENOENT || errno == ENOTDIR)
- continue;
-
- return -errno;
- }
-
- fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0) {
- if (errno == ENOENT)
- continue;
-
- return -errno;
- }
-
- n = read(fd, contents, sizeof(contents));
- if (n < 0)
- return -errno;
-
- if (n != 6 || memcmp(contents, "Mains\n", 6))
- continue;
-
- safe_close(fd);
- fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0) {
- if (errno == ENOENT)
- continue;
-
- return -errno;
- }
-
- n = read(fd, contents, sizeof(contents));
- if (n < 0)
- return -errno;
-
- if (n != 2 || contents[1] != '\n')
- return -EIO;
-
- if (contents[0] == '1') {
- found_online = true;
- break;
- } else if (contents[0] == '0')
- found_offline = true;
- else
- return -EIO;
- }
-
- return found_online || !found_offline;
-}
-
-bool id128_is_valid(const char *s) {
- size_t i, l;
-
- l = strlen(s);
- if (l == 32) {
-
- /* Simple formatted 128bit hex string */
-
- for (i = 0; i < l; i++) {
- char c = s[i];
-
- if (!(c >= '0' && c <= '9') &&
- !(c >= 'a' && c <= 'z') &&
- !(c >= 'A' && c <= 'Z'))
- return false;
- }
-
- } else if (l == 36) {
-
- /* Formatted UUID */
-
- for (i = 0; i < l; i++) {
- char c = s[i];
-
- if ((i == 8 || i == 13 || i == 18 || i == 23)) {
- if (c != '-')
- return false;
- } else {
- if (!(c >= '0' && c <= '9') &&
- !(c >= 'a' && c <= 'z') &&
- !(c >= 'A' && c <= 'Z'))
- return false;
- }
- }
-
- } else
- return false;
-
- return true;
-}
-
-int container_get_leader(const char *machine, pid_t *pid) {
- _cleanup_free_ char *s = NULL, *class = NULL;
- const char *p;
- pid_t leader;
- int r;
-
- assert(machine);
- assert(pid);
-
- if (!machine_name_is_valid(machine))
- return -EINVAL;
-
- p = strjoina("/run/systemd/machines/", machine);
- r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
- if (r == -ENOENT)
- return -EHOSTDOWN;
- if (r < 0)
- return r;
- if (!s)
- return -EIO;
-
- if (!streq_ptr(class, "container"))
- return -EIO;
-
- r = parse_pid(s, &leader);
- if (r < 0)
- return r;
- if (leader <= 1)
- return -EIO;
-
- *pid = leader;
- return 0;
-}
-
-int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) {
- _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1;
- int rfd = -1;
-
- assert(pid >= 0);
-
- if (mntns_fd) {
- const char *mntns;
-
- mntns = procfs_file_alloca(pid, "ns/mnt");
- mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
- if (mntnsfd < 0)
- return -errno;
- }
-
- if (pidns_fd) {
- const char *pidns;
-
- pidns = procfs_file_alloca(pid, "ns/pid");
- pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
- if (pidnsfd < 0)
- return -errno;
- }
-
- if (netns_fd) {
- const char *netns;
-
- netns = procfs_file_alloca(pid, "ns/net");
- netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
- if (netnsfd < 0)
- return -errno;
- }
-
- if (userns_fd) {
- const char *userns;
-
- userns = procfs_file_alloca(pid, "ns/user");
- usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
- if (usernsfd < 0 && errno != ENOENT)
- return -errno;
- }
-
- if (root_fd) {
- const char *root;
-
- root = procfs_file_alloca(pid, "root");
- rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
- if (rfd < 0)
- return -errno;
- }
-
- if (pidns_fd)
- *pidns_fd = pidnsfd;
-
- if (mntns_fd)
- *mntns_fd = mntnsfd;
-
- if (netns_fd)
- *netns_fd = netnsfd;
-
- if (userns_fd)
- *userns_fd = usernsfd;
-
- if (root_fd)
- *root_fd = rfd;
-
- pidnsfd = mntnsfd = netnsfd = usernsfd = -1;
-
- return 0;
-}
-
-int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) {
- if (userns_fd >= 0) {
- /* Can't setns to your own userns, since then you could
- * escalate from non-root to root in your own namespace, so
- * check if namespaces equal before attempting to enter. */
- _cleanup_free_ char *userns_fd_path = NULL;
- int r;
- if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0)
- return -ENOMEM;
-
- r = files_same(userns_fd_path, "/proc/self/ns/user");
- if (r < 0)
- return r;
- if (r)
- userns_fd = -1;
- }
-
- if (pidns_fd >= 0)
- if (setns(pidns_fd, CLONE_NEWPID) < 0)
- return -errno;
-
- if (mntns_fd >= 0)
- if (setns(mntns_fd, CLONE_NEWNS) < 0)
- return -errno;
-
- if (netns_fd >= 0)
- if (setns(netns_fd, CLONE_NEWNET) < 0)
- return -errno;
-
- if (userns_fd >= 0)
- if (setns(userns_fd, CLONE_NEWUSER) < 0)
- return -errno;
-
- if (root_fd >= 0) {
- if (fchdir(root_fd) < 0)
- return -errno;
-
- if (chroot(".") < 0)
- return -errno;
- }
-
- return reset_uid_gid();
-}
-
-uint64_t physical_memory(void) {
- long mem;
-
- /* We return this as uint64_t in case we are running as 32bit
- * process on a 64bit kernel with huge amounts of memory */
-
- mem = sysconf(_SC_PHYS_PAGES);
- assert(mem > 0);
-
- return (uint64_t) mem * (uint64_t) page_size();
-}
-
-int update_reboot_parameter_and_warn(const char *param) {
- int r;
-
- if (isempty(param)) {
- if (unlink("/run/systemd/reboot-param") < 0) {
- if (errno == ENOENT)
- return 0;
-
- return log_warning_errno(errno, "Failed to unlink reboot parameter file: %m");
- }
-
- return 0;
- }
-
- RUN_WITH_UMASK(0022) {
- r = write_string_file("/run/systemd/reboot-param", param, WRITE_STRING_FILE_CREATE);
- if (r < 0)
- return log_warning_errno(r, "Failed to write reboot parameter file: %m");
- }
-
- return 0;
-}
-
-int version(void) {
- puts(PACKAGE_STRING "\n"
- SYSTEMD_FEATURES);
- return 0;
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-14 06:48:58 +0000