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Diffstat (limited to 'src/libsystemd/sd-daemon/sd-daemon.c')
-rw-r--r--src/libsystemd/sd-daemon/sd-daemon.c622
1 files changed, 0 insertions, 622 deletions
diff --git a/src/libsystemd/sd-daemon/sd-daemon.c b/src/libsystemd/sd-daemon/sd-daemon.c
deleted file mode 100644
index b20a7ebb4c..0000000000
--- a/src/libsystemd/sd-daemon/sd-daemon.c
+++ /dev/null
@@ -1,622 +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 <errno.h>
-#include <limits.h>
-#include <mqueue.h>
-#include <netinet/in.h>
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/un.h>
-#include <unistd.h>
-
-#include "sd-daemon.h"
-
-#include "alloc-util.h"
-#include "fd-util.h"
-#include "fs-util.h"
-#include "parse-util.h"
-#include "path-util.h"
-#include "socket-util.h"
-#include "strv.h"
-#include "util.h"
-
-#define SNDBUF_SIZE (8*1024*1024)
-
-static void unsetenv_all(bool unset_environment) {
-
- if (!unset_environment)
- return;
-
- unsetenv("LISTEN_PID");
- unsetenv("LISTEN_FDS");
- unsetenv("LISTEN_FDNAMES");
-}
-
-_public_ int sd_listen_fds(int unset_environment) {
- const char *e;
- int n, r, fd;
- pid_t pid;
-
- e = getenv("LISTEN_PID");
- if (!e) {
- r = 0;
- goto finish;
- }
-
- r = parse_pid(e, &pid);
- if (r < 0)
- goto finish;
-
- /* Is this for us? */
- if (getpid() != pid) {
- r = 0;
- goto finish;
- }
-
- e = getenv("LISTEN_FDS");
- if (!e) {
- r = 0;
- goto finish;
- }
-
- r = safe_atoi(e, &n);
- if (r < 0)
- goto finish;
-
- assert_cc(SD_LISTEN_FDS_START < INT_MAX);
- if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START) {
- r = -EINVAL;
- goto finish;
- }
-
- for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
- r = fd_cloexec(fd, true);
- if (r < 0)
- goto finish;
- }
-
- r = n;
-
-finish:
- unsetenv_all(unset_environment);
- return r;
-}
-
-_public_ int sd_listen_fds_with_names(int unset_environment, char ***names) {
- _cleanup_strv_free_ char **l = NULL;
- bool have_names;
- int n_names = 0, n_fds;
- const char *e;
- int r;
-
- if (!names)
- return sd_listen_fds(unset_environment);
-
- e = getenv("LISTEN_FDNAMES");
- if (e) {
- n_names = strv_split_extract(&l, e, ":", EXTRACT_DONT_COALESCE_SEPARATORS);
- if (n_names < 0) {
- unsetenv_all(unset_environment);
- return n_names;
- }
-
- have_names = true;
- } else
- have_names = false;
-
- n_fds = sd_listen_fds(unset_environment);
- if (n_fds <= 0)
- return n_fds;
-
- if (have_names) {
- if (n_names != n_fds)
- return -EINVAL;
- } else {
- r = strv_extend_n(&l, "unknown", n_fds);
- if (r < 0)
- return r;
- }
-
- *names = l;
- l = NULL;
-
- return n_fds;
-}
-
-_public_ int sd_is_fifo(int fd, const char *path) {
- struct stat st_fd;
-
- assert_return(fd >= 0, -EBADF);
-
- if (fstat(fd, &st_fd) < 0)
- return -errno;
-
- if (!S_ISFIFO(st_fd.st_mode))
- return 0;
-
- if (path) {
- struct stat st_path;
-
- if (stat(path, &st_path) < 0) {
-
- if (errno == ENOENT || errno == ENOTDIR)
- return 0;
-
- return -errno;
- }
-
- return
- st_path.st_dev == st_fd.st_dev &&
- st_path.st_ino == st_fd.st_ino;
- }
-
- return 1;
-}
-
-_public_ int sd_is_special(int fd, const char *path) {
- struct stat st_fd;
-
- assert_return(fd >= 0, -EBADF);
-
- if (fstat(fd, &st_fd) < 0)
- return -errno;
-
- if (!S_ISREG(st_fd.st_mode) && !S_ISCHR(st_fd.st_mode))
- return 0;
-
- if (path) {
- struct stat st_path;
-
- if (stat(path, &st_path) < 0) {
-
- if (errno == ENOENT || errno == ENOTDIR)
- return 0;
-
- return -errno;
- }
-
- if (S_ISREG(st_fd.st_mode) && S_ISREG(st_path.st_mode))
- return
- st_path.st_dev == st_fd.st_dev &&
- st_path.st_ino == st_fd.st_ino;
- else if (S_ISCHR(st_fd.st_mode) && S_ISCHR(st_path.st_mode))
- return st_path.st_rdev == st_fd.st_rdev;
- else
- return 0;
- }
-
- return 1;
-}
-
-static int sd_is_socket_internal(int fd, int type, int listening) {
- struct stat st_fd;
-
- assert_return(fd >= 0, -EBADF);
- assert_return(type >= 0, -EINVAL);
-
- if (fstat(fd, &st_fd) < 0)
- return -errno;
-
- if (!S_ISSOCK(st_fd.st_mode))
- return 0;
-
- if (type != 0) {
- int other_type = 0;
- socklen_t l = sizeof(other_type);
-
- if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &other_type, &l) < 0)
- return -errno;
-
- if (l != sizeof(other_type))
- return -EINVAL;
-
- if (other_type != type)
- return 0;
- }
-
- if (listening >= 0) {
- int accepting = 0;
- socklen_t l = sizeof(accepting);
-
- if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &accepting, &l) < 0)
- return -errno;
-
- if (l != sizeof(accepting))
- return -EINVAL;
-
- if (!accepting != !listening)
- return 0;
- }
-
- return 1;
-}
-
-_public_ int sd_is_socket(int fd, int family, int type, int listening) {
- int r;
-
- assert_return(fd >= 0, -EBADF);
- assert_return(family >= 0, -EINVAL);
-
- r = sd_is_socket_internal(fd, type, listening);
- if (r <= 0)
- return r;
-
- if (family > 0) {
- union sockaddr_union sockaddr = {};
- socklen_t l = sizeof(sockaddr);
-
- if (getsockname(fd, &sockaddr.sa, &l) < 0)
- return -errno;
-
- if (l < sizeof(sa_family_t))
- return -EINVAL;
-
- return sockaddr.sa.sa_family == family;
- }
-
- return 1;
-}
-
-_public_ int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) {
- union sockaddr_union sockaddr = {};
- socklen_t l = sizeof(sockaddr);
- int r;
-
- assert_return(fd >= 0, -EBADF);
- assert_return(IN_SET(family, 0, AF_INET, AF_INET6), -EINVAL);
-
- r = sd_is_socket_internal(fd, type, listening);
- if (r <= 0)
- return r;
-
- if (getsockname(fd, &sockaddr.sa, &l) < 0)
- return -errno;
-
- if (l < sizeof(sa_family_t))
- return -EINVAL;
-
- if (sockaddr.sa.sa_family != AF_INET &&
- sockaddr.sa.sa_family != AF_INET6)
- return 0;
-
- if (family != 0)
- if (sockaddr.sa.sa_family != family)
- return 0;
-
- if (port > 0) {
- if (sockaddr.sa.sa_family == AF_INET) {
- if (l < sizeof(struct sockaddr_in))
- return -EINVAL;
-
- return htobe16(port) == sockaddr.in.sin_port;
- } else {
- if (l < sizeof(struct sockaddr_in6))
- return -EINVAL;
-
- return htobe16(port) == sockaddr.in6.sin6_port;
- }
- }
-
- return 1;
-}
-
-_public_ int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
- union sockaddr_union sockaddr = {};
- socklen_t l = sizeof(sockaddr);
- int r;
-
- assert_return(fd >= 0, -EBADF);
-
- r = sd_is_socket_internal(fd, type, listening);
- if (r <= 0)
- return r;
-
- if (getsockname(fd, &sockaddr.sa, &l) < 0)
- return -errno;
-
- if (l < sizeof(sa_family_t))
- return -EINVAL;
-
- if (sockaddr.sa.sa_family != AF_UNIX)
- return 0;
-
- if (path) {
- if (length == 0)
- length = strlen(path);
-
- if (length == 0)
- /* Unnamed socket */
- return l == offsetof(struct sockaddr_un, sun_path);
-
- if (path[0])
- /* Normal path socket */
- return
- (l >= offsetof(struct sockaddr_un, sun_path) + length + 1) &&
- memcmp(path, sockaddr.un.sun_path, length+1) == 0;
- else
- /* Abstract namespace socket */
- return
- (l == offsetof(struct sockaddr_un, sun_path) + length) &&
- memcmp(path, sockaddr.un.sun_path, length) == 0;
- }
-
- return 1;
-}
-
-_public_ int sd_is_mq(int fd, const char *path) {
- struct mq_attr attr;
-
- /* Check that the fd is valid */
- assert_return(fcntl(fd, F_GETFD) >= 0, -errno);
-
- if (mq_getattr(fd, &attr) < 0) {
- if (errno == EBADF)
- /* A non-mq fd (or an invalid one, but we ruled that out above) */
- return 0;
- return -errno;
- }
-
- if (path) {
- char fpath[PATH_MAX];
- struct stat a, b;
-
- assert_return(path_is_absolute(path), -EINVAL);
-
- if (fstat(fd, &a) < 0)
- return -errno;
-
- strncpy(stpcpy(fpath, "/dev/mqueue"), path, sizeof(fpath) - 12);
- fpath[sizeof(fpath)-1] = 0;
-
- if (stat(fpath, &b) < 0)
- return -errno;
-
- if (a.st_dev != b.st_dev ||
- a.st_ino != b.st_ino)
- return 0;
- }
-
- return 1;
-}
-
-_public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char *state, const int *fds, unsigned n_fds) {
- union sockaddr_union sockaddr = {
- .sa.sa_family = AF_UNIX,
- };
- struct iovec iovec = {
- .iov_base = (char*) state,
- };
- struct msghdr msghdr = {
- .msg_iov = &iovec,
- .msg_iovlen = 1,
- .msg_name = &sockaddr,
- };
- _cleanup_close_ int fd = -1;
- struct cmsghdr *cmsg = NULL;
- const char *e;
- bool have_pid;
- int r;
-
- if (!state) {
- r = -EINVAL;
- goto finish;
- }
-
- if (n_fds > 0 && !fds) {
- r = -EINVAL;
- goto finish;
- }
-
- e = getenv("NOTIFY_SOCKET");
- if (!e)
- return 0;
-
- /* Must be an abstract socket, or an absolute path */
- if ((e[0] != '@' && e[0] != '/') || e[1] == 0) {
- r = -EINVAL;
- goto finish;
- }
-
- if (strlen(e) > sizeof(sockaddr.un.sun_path)) {
- r = -EINVAL;
- goto finish;
- }
-
- fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
- if (fd < 0) {
- r = -errno;
- goto finish;
- }
-
- fd_inc_sndbuf(fd, SNDBUF_SIZE);
-
- iovec.iov_len = strlen(state);
-
- strncpy(sockaddr.un.sun_path, e, sizeof(sockaddr.un.sun_path));
- if (sockaddr.un.sun_path[0] == '@')
- sockaddr.un.sun_path[0] = 0;
-
- msghdr.msg_namelen = SOCKADDR_UN_LEN(sockaddr.un);
-
- have_pid = pid != 0 && pid != getpid();
-
- if (n_fds > 0 || have_pid) {
- /* CMSG_SPACE(0) may return value different than zero, which results in miscalculated controllen. */
- msghdr.msg_controllen =
- (n_fds > 0 ? CMSG_SPACE(sizeof(int) * n_fds) : 0) +
- (have_pid ? CMSG_SPACE(sizeof(struct ucred)) : 0);
-
- msghdr.msg_control = alloca0(msghdr.msg_controllen);
-
- cmsg = CMSG_FIRSTHDR(&msghdr);
- if (n_fds > 0) {
- cmsg->cmsg_level = SOL_SOCKET;
- cmsg->cmsg_type = SCM_RIGHTS;
- cmsg->cmsg_len = CMSG_LEN(sizeof(int) * n_fds);
-
- memcpy(CMSG_DATA(cmsg), fds, sizeof(int) * n_fds);
-
- if (have_pid)
- assert_se(cmsg = CMSG_NXTHDR(&msghdr, cmsg));
- }
-
- if (have_pid) {
- struct ucred *ucred;
-
- cmsg->cmsg_level = SOL_SOCKET;
- cmsg->cmsg_type = SCM_CREDENTIALS;
- cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
-
- ucred = (struct ucred*) CMSG_DATA(cmsg);
- ucred->pid = pid;
- ucred->uid = getuid();
- ucred->gid = getgid();
- }
- }
-
- /* First try with fake ucred data, as requested */
- if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) >= 0) {
- r = 1;
- goto finish;
- }
-
- /* If that failed, try with our own ucred instead */
- if (have_pid) {
- msghdr.msg_controllen -= CMSG_SPACE(sizeof(struct ucred));
- if (msghdr.msg_controllen == 0)
- msghdr.msg_control = NULL;
-
- if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) >= 0) {
- r = 1;
- goto finish;
- }
- }
-
- r = -errno;
-
-finish:
- if (unset_environment)
- unsetenv("NOTIFY_SOCKET");
-
- return r;
-}
-
-_public_ int sd_pid_notify(pid_t pid, int unset_environment, const char *state) {
- return sd_pid_notify_with_fds(pid, unset_environment, state, NULL, 0);
-}
-
-_public_ int sd_notify(int unset_environment, const char *state) {
- return sd_pid_notify_with_fds(0, unset_environment, state, NULL, 0);
-}
-
-_public_ int sd_pid_notifyf(pid_t pid, int unset_environment, const char *format, ...) {
- _cleanup_free_ char *p = NULL;
- int r;
-
- if (format) {
- va_list ap;
-
- va_start(ap, format);
- r = vasprintf(&p, format, ap);
- va_end(ap);
-
- if (r < 0 || !p)
- return -ENOMEM;
- }
-
- return sd_pid_notify(pid, unset_environment, p);
-}
-
-_public_ int sd_notifyf(int unset_environment, const char *format, ...) {
- _cleanup_free_ char *p = NULL;
- int r;
-
- if (format) {
- va_list ap;
-
- va_start(ap, format);
- r = vasprintf(&p, format, ap);
- va_end(ap);
-
- if (r < 0 || !p)
- return -ENOMEM;
- }
-
- return sd_pid_notify(0, unset_environment, p);
-}
-
-_public_ int sd_booted(void) {
- /* We test whether the runtime unit file directory has been
- * created. This takes place in mount-setup.c, so is
- * guaranteed to happen very early during boot. */
-
- return laccess("/run/systemd/system/", F_OK) >= 0;
-}
-
-_public_ int sd_watchdog_enabled(int unset_environment, uint64_t *usec) {
- const char *s, *p = ""; /* p is set to dummy value to do unsetting */
- uint64_t u;
- int r = 0;
-
- s = getenv("WATCHDOG_USEC");
- if (!s)
- goto finish;
-
- r = safe_atou64(s, &u);
- if (r < 0)
- goto finish;
- if (u <= 0 || u >= USEC_INFINITY) {
- r = -EINVAL;
- goto finish;
- }
-
- p = getenv("WATCHDOG_PID");
- if (p) {
- pid_t pid;
-
- r = parse_pid(p, &pid);
- if (r < 0)
- goto finish;
-
- /* Is this for us? */
- if (getpid() != pid) {
- r = 0;
- goto finish;
- }
- }
-
- if (usec)
- *usec = u;
-
- r = 1;
-
-finish:
- if (unset_environment && s)
- unsetenv("WATCHDOG_USEC");
- if (unset_environment && p)
- unsetenv("WATCHDOG_PID");
-
- return r;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 13:06:38 +0000