-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- 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 <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <netinet/in.h>
-#include <stdlib.h>
#include <errno.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stddef.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 "util.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 "process-util.h"
#include "socket-util.h"
-#include "sd-daemon.h"
+#include "strv.h"
+#include "util.h"
+
+/// Additional includes needed by elogind
+#include "process-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;
- unsigned n;
- int r, fd;
+ int n, r, fd;
pid_t pid;
e = getenv("LISTEN_PID");
goto finish;
/* Is this for us? */
- if (getpid() != pid) {
+ if (getpid_cached() != pid) {
r = 0;
goto finish;
}
goto finish;
}
- r = safe_atou(e, &n);
+ r = safe_atoi(e, &n);
if (r < 0)
goto finish;
- for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) n; fd ++) {
+ 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 = (int) n;
+ r = n;
finish:
- if (unset_environment) {
- unsetenv("LISTEN_PID");
- unsetenv("LISTEN_FDS");
+ 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;
}
- return r;
+ *names = TAKE_PTR(l);
+
+ return n_fds;
}
_public_ int sd_is_fifo(int fd, const char *path) {
struct stat st_fd;
- assert_return(fd >= 0, -EINVAL);
+ assert_return(fd >= 0, -EBADF);
if (fstat(fd, &st_fd) < 0)
return -errno;
if (stat(path, &st_path) < 0) {
- if (errno == ENOENT || errno == ENOTDIR)
+ if (IN_SET(errno, ENOENT, ENOTDIR))
return 0;
return -errno;
_public_ int sd_is_special(int fd, const char *path) {
struct stat st_fd;
- assert_return(fd >= 0, -EINVAL);
+ assert_return(fd >= 0, -EBADF);
if (fstat(fd, &st_fd) < 0)
return -errno;
if (stat(path, &st_path) < 0) {
- if (errno == ENOENT || errno == ENOTDIR)
+ if (IN_SET(errno, ENOENT, ENOTDIR))
return 0;
return -errno;
static int sd_is_socket_internal(int fd, int type, int listening) {
struct stat st_fd;
- assert_return(fd >= 0, -EINVAL);
+ assert_return(fd >= 0, -EBADF);
assert_return(type >= 0, -EINVAL);
if (fstat(fd, &st_fd) < 0)
_public_ int sd_is_socket(int fd, int family, int type, int listening) {
int r;
- assert_return(fd >= 0, -EINVAL);
+ assert_return(fd >= 0, -EBADF);
assert_return(family >= 0, -EINVAL);
r = sd_is_socket_internal(fd, type, listening);
socklen_t l = sizeof(sockaddr);
int r;
- assert_return(fd >= 0, -EINVAL);
+ 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 (l < sizeof(sa_family_t))
return -EINVAL;
- if (sockaddr.sa.sa_family != AF_INET &&
- sockaddr.sa.sa_family != AF_INET6)
+ if (!IN_SET(sockaddr.sa.sa_family, AF_INET, AF_INET6))
return 0;
if (family != 0)
return 0;
if (port > 0) {
- if (sockaddr.sa.sa_family == AF_INET) {
- if (l < sizeof(struct sockaddr_in))
- return -EINVAL;
+ unsigned sa_port;
- return htons(port) == sockaddr.in.sin_port;
- } else {
- if (l < sizeof(struct sockaddr_in6))
- return -EINVAL;
+ r = sockaddr_port(&sockaddr.sa, &sa_port);
+ if (r < 0)
+ return r;
- return htons(port) == sockaddr.in6.sin6_port;
- }
+ return port == sa_port;
}
return 1;
}
+_public_ int sd_is_socket_sockaddr(int fd, int type, const struct sockaddr* addr, unsigned addr_len, int listening) {
+ union sockaddr_union sockaddr = {};
+ socklen_t l = sizeof(sockaddr);
+ int r;
+
+ assert_return(fd >= 0, -EBADF);
+ assert_return(addr, -EINVAL);
+ assert_return(addr_len >= sizeof(sa_family_t), -ENOBUFS);
+ assert_return(IN_SET(addr->sa_family, AF_INET, AF_INET6), -EPFNOSUPPORT);
+
+ 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 != addr->sa_family)
+ return 0;
+
+ if (sockaddr.sa.sa_family == AF_INET) {
+ const struct sockaddr_in *in = (const struct sockaddr_in *) addr;
+
+ if (l < sizeof(struct sockaddr_in) || addr_len < sizeof(struct sockaddr_in))
+ return -EINVAL;
+
+ if (in->sin_port != 0 &&
+ sockaddr.in.sin_port != in->sin_port)
+ return false;
+
+ return sockaddr.in.sin_addr.s_addr == in->sin_addr.s_addr;
+
+ } else {
+ const struct sockaddr_in6 *in = (const struct sockaddr_in6 *) addr;
+
+ if (l < sizeof(struct sockaddr_in6) || addr_len < sizeof(struct sockaddr_in6))
+ return -EINVAL;
+
+ if (in->sin6_port != 0 &&
+ sockaddr.in6.sin6_port != in->sin6_port)
+ return false;
+
+ if (in->sin6_flowinfo != 0 &&
+ sockaddr.in6.sin6_flowinfo != in->sin6_flowinfo)
+ return false;
+
+ if (in->sin6_scope_id != 0 &&
+ sockaddr.in6.sin6_scope_id != in->sin6_scope_id)
+ return false;
+
+ return memcmp(sockaddr.in6.sin6_addr.s6_addr, in->sin6_addr.s6_addr,
+ sizeof(in->sin6_addr.s6_addr)) == 0;
+ }
+}
+
_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, -EINVAL);
+ assert_return(fd >= 0, -EBADF);
r = sd_is_socket_internal(fd, type, listening);
if (r <= 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) {
+#if 0 /// UNNEEDED by elogind
+_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;
+}
+#endif // 0
+
+_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,
};
_cleanup_close_ int fd = -1;
struct cmsghdr *cmsg = NULL;
const char *e;
- bool have_pid;
+ bool send_ucred;
int r;
if (!state) {
return 0;
/* Must be an abstract socket, or an absolute path */
- if ((e[0] != '@' && e[0] != '/') || e[1] == 0) {
+ if (!IN_SET(e[0], '@', '/') || e[1] == 0) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if (strlen(e) > sizeof(sockaddr.un.sun_path)) {
r = -EINVAL;
goto finish;
}
goto finish;
}
+ (void) 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 = offsetof(struct sockaddr_un, sun_path) + strlen(e);
- if (msghdr.msg_namelen > sizeof(struct sockaddr_un))
- msghdr.msg_namelen = sizeof(struct sockaddr_un);
+ msghdr.msg_namelen = SOCKADDR_UN_LEN(sockaddr.un);
+
+ send_ucred =
+ (pid != 0 && pid != getpid_cached()) ||
+ getuid() != geteuid() ||
+ getgid() != getegid();
- have_pid = pid != 0 && pid != getpid();
+ if (n_fds > 0 || send_ucred) {
+ /* 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) +
+ (send_ucred ? CMSG_SPACE(sizeof(struct ucred)) : 0);
- if (n_fds > 0 || have_pid) {
- msghdr.msg_controllen = CMSG_SPACE(sizeof(int) * n_fds) +
- CMSG_SPACE(sizeof(struct ucred) * have_pid);
- msghdr.msg_control = alloca(msghdr.msg_controllen);
+ msghdr.msg_control = alloca0(msghdr.msg_controllen);
cmsg = CMSG_FIRSTHDR(&msghdr);
if (n_fds > 0) {
memcpy(CMSG_DATA(cmsg), fds, sizeof(int) * n_fds);
- if (have_pid)
+ if (send_ucred)
assert_se(cmsg = CMSG_NXTHDR(&msghdr, cmsg));
}
- if (have_pid) {
+ if (send_ucred) {
struct ucred *ucred;
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
ucred = (struct ucred*) CMSG_DATA(cmsg);
- ucred->pid = pid;
+ ucred->pid = pid != 0 ? pid : getpid_cached();
ucred->uid = getuid();
ucred->gid = getgid();
}
}
/* If that failed, try with our own ucred instead */
- if (have_pid) {
+ if (send_ucred) {
msghdr.msg_controllen -= CMSG_SPACE(sizeof(struct ucred));
if (msghdr.msg_controllen == 0)
msghdr.msg_control = NULL;
}
_public_ int sd_booted(void) {
- struct stat st;
-
/* 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. */
- if (lstat("/run/systemd/system/", &st) < 0)
- return 0;
-
- return !!S_ISDIR(st.st_mode);
+#if 0 /// elogind is always used without systemd running the show. (Well, it should...)
+ return laccess("/run/systemd/system/", F_OK) >= 0;
+#else
+ return 0;
+#endif // 0
}
_public_ int sd_watchdog_enabled(int unset_environment, uint64_t *usec) {
r = safe_atou64(s, &u);
if (r < 0)
goto finish;
- if (u <= 0) {
+ if (u <= 0 || u >= USEC_INFINITY) {
r = -EINVAL;
goto finish;
}
goto finish;
/* Is this for us? */
- if (getpid() != pid) {
+ if (getpid_cached() != pid) {
r = 0;
goto finish;
}
~ianmdlvl / elogind.git / blobdiff