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tree-wide: port various users over to connect_unix_path()

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Let's make use of our new helper, and thus allow longer paths.
This commit is contained in:
Lennart Poettering 2022-05-10 18:08:57 +02:00 committed by Yu Watanabe
parent 28ae8da972
commit 1861986a3b
9 changed files with 59 additions and 101 deletions
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30
src/basic/log.c
View File

@ -149,12 +149,6 @@ static int create_log_socket(int type) {
}
static int log_open_syslog(void) {
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/dev/log",
};
int r;
if (syslog_fd >= 0)
@ -166,22 +160,21 @@ static int log_open_syslog(void) {
goto fail;
}
if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
r = connect_unix_path(syslog_fd, AT_FDCWD, "/dev/log");
if (r < 0) {
safe_close(syslog_fd);
/* Some legacy syslog systems still use stream
* sockets. They really shouldn't. But what can we
* do... */
/* Some legacy syslog systems still use stream sockets. They really shouldn't. But what can
* we do... */
syslog_fd = create_log_socket(SOCK_STREAM);
if (syslog_fd < 0) {
r = syslog_fd;
goto fail;
}
if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
r = -errno;
r = connect_unix_path(syslog_fd, AT_FDCWD, "/dev/log");
if (r < 0)
goto fail;
}
syslog_is_stream = true;
} else
@ -199,12 +192,6 @@ static void log_close_journal(void) {
}
static int log_open_journal(void) {
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/systemd/journal/socket",
};
int r;
if (journal_fd >= 0)
@ -216,10 +203,9 @@ static int log_open_journal(void) {
goto fail;
}
if (connect(journal_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
r = -errno;
r = connect_unix_path(journal_fd, AT_FDCWD, "/run/systemd/journal/socket");
if (r < 0)
goto fail;
}
return 0;

29
src/core/execute.c
View File

@ -277,8 +277,6 @@ static int connect_journal_socket(
uid_t uid,
gid_t gid) {
union sockaddr_union sa;
socklen_t sa_len;
uid_t olduid = UID_INVALID;
gid_t oldgid = GID_INVALID;
const char *j;
@ -287,10 +285,6 @@ static int connect_journal_socket(
j = log_namespace ?
strjoina("/run/systemd/journal.", log_namespace, "/stdout") :
"/run/systemd/journal/stdout";
r = sockaddr_un_set_path(&sa.un, j);
if (r < 0)
return r;
sa_len = r;
if (gid_is_valid(gid)) {
oldgid = getgid();
@ -308,10 +302,10 @@ static int connect_journal_socket(
}
}
r = RET_NERRNO(connect(fd, &sa.sa, sa_len));
r = connect_unix_path(fd, AT_FDCWD, j);
/* If we fail to restore the uid or gid, things will likely
fail later on. This should only happen if an LSM interferes. */
/* If we fail to restore the uid or gid, things will likely fail later on. This should only happen if
an LSM interferes. */
if (uid_is_valid(uid))
(void) seteuid(olduid);
@ -389,8 +383,6 @@ static int open_terminal_as(const char *path, int flags, int nfd) {
}
static int acquire_path(const char *path, int flags, mode_t mode) {
union sockaddr_union sa;
socklen_t sa_len;
_cleanup_close_ int fd = -1;
int r;
@ -408,18 +400,17 @@ static int acquire_path(const char *path, int flags, mode_t mode) {
/* So, it appears the specified path could be an AF_UNIX socket. Let's see if we can connect to it. */
r = sockaddr_un_set_path(&sa.un, path);
if (r < 0)
return r == -EINVAL ? -ENXIO : r;
sa_len = r;
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd < 0)
return -errno;
if (connect(fd, &sa.sa, sa_len) < 0)
return errno == EINVAL ? -ENXIO : -errno; /* Propagate initial error if we get EINVAL, i.e. we have
* indication that this wasn't an AF_UNIX socket after all */
r = connect_unix_path(fd, AT_FDCWD, path);
if (IN_SET(r, -ENOTSOCK, -EINVAL))
/* Propagate initial error if we get ENOTSOCK or EINVAL, i.e. we have indication that this
* wasn't an AF_UNIX socket after all */
return -ENXIO;
if (r < 0)
return r;
if ((flags & O_ACCMODE) == O_RDONLY)
r = shutdown(fd, SHUT_WR);

10
src/coredump/coredump.c
View File

@ -1055,11 +1055,6 @@ finish:
}
static int send_iovec(const struct iovec_wrapper *iovw, int input_fd) {
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/systemd/coredump",
};
_cleanup_close_ int fd = -1;
int r;
@ -1070,8 +1065,9 @@ static int send_iovec(const struct iovec_wrapper *iovw, int input_fd) {
if (fd < 0)
return log_error_errno(errno, "Failed to create coredump socket: %m");
if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0)
return log_error_errno(errno, "Failed to connect to coredump service: %m");
r = connect_unix_path(fd, AT_FDCWD, "/run/systemd/coredump");
if (r < 0)
return log_error_errno(r, "Failed to connect to coredump service: %m");
for (size_t i = 0; i < iovw->count; i++) {
struct msghdr mh = {

13
src/fsck/fsck.c
View File

@ -226,20 +226,17 @@ static int process_progress(int fd, FILE* console) {
}
static int fsck_progress_socket(void) {
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/systemd/fsck.progress",
};
_cleanup_close_ int fd = -1;
int r;
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd < 0)
return log_warning_errno(errno, "socket(): %m");
if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0)
return log_full_errno(IN_SET(errno, ECONNREFUSED, ENOENT) ? LOG_DEBUG : LOG_WARNING,
errno, "Failed to connect to progress socket %s, ignoring: %m", sa.un.sun_path);
r = connect_unix_path(fd, AT_FDCWD, "/run/systemd/fsck.progress");
if (r < 0)
return log_full_errno(IN_SET(r, -ECONNREFUSED, -ENOENT) ? LOG_DEBUG : LOG_WARNING,
r, "Failed to connect to progress socket, ignoring: %m");
return TAKE_FD(fd);
}

8
src/libsystemd/sd-journal/journal-send.c
View File

@ -408,10 +408,6 @@ _public_ int sd_journal_perror(const char *message) {
}
_public_ int sd_journal_stream_fd(const char *identifier, int priority, int level_prefix) {
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/systemd/journal/stdout",
};
_cleanup_close_ int fd = -1;
char *header;
size_t l;
@ -424,9 +420,9 @@ _public_ int sd_journal_stream_fd(const char *identifier, int priority, int leve
if (fd < 0)
return -errno;
r = connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
r = connect_unix_path(fd, AT_FDCWD, "/run/systemd/journal/stdout");
if (r < 0)
return -errno;
return r;
if (shutdown(fd, SHUT_RD) < 0)
return -errno;

14
src/nspawn/nspawn.c
View File

@ -5387,12 +5387,6 @@ static int initialize_rlimits(void) {
}
static int cant_be_in_netns(void) {
union sockaddr_union sa = {
.un = {
.sun_family = AF_UNIX,
.sun_path = "/run/udev/control",
},
};
char udev_path[STRLEN("/proc//ns/net") + DECIMAL_STR_MAX(pid_t)];
_cleanup_free_ char *udev_ns = NULL, *our_ns = NULL;
_cleanup_close_ int fd = -1;
@ -5410,13 +5404,13 @@ static int cant_be_in_netns(void) {
if (fd < 0)
return log_error_errno(errno, "Failed to allocate udev control socket: %m");
if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
if (errno == ENOENT || ERRNO_IS_DISCONNECT(errno))
r = connect_unix_path(fd, AT_FDCWD, "/run/udev/control");
if (r < 0) {
if (r == -ENOENT || ERRNO_IS_DISCONNECT(r))
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"Sorry, but --image= requires access to the host's /run/ hierarchy, since we need access to udev.");
return log_error_errno(errno, "Failed to connect socket to udev control socket: %m");
return log_error_errno(r, "Failed to connect socket to udev control socket: %m");
}
r = getpeercred(fd, &ucred);

20
src/shared/nscd-flush.c
View File

@ -1,4 +1,6 @@
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <fcntl.h>
#include <poll.h>
#include "fd-util.h"
@ -18,17 +20,12 @@ struct nscdInvalidateRequest {
char dbname[];
};
static const union sockaddr_union nscd_sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/nscd/socket",
};
static int nscd_flush_cache_one(const char *database, usec_t end) {
size_t req_size, has_written = 0, has_read = 0, l;
struct nscdInvalidateRequest *req;
_cleanup_close_ int fd = -1;
int32_t resp;
int events;
int events, r;
assert(database);
@ -60,11 +57,12 @@ static int nscd_flush_cache_one(const char *database, usec_t end) {
* nice way to connect() to a server synchronously with a time limit that would also cover dealing with the
* backlog limit. After all SO_RCVTIMEO and SR_SNDTIMEO don't apply to connect(), and alarm() is frickin' ugly
* and not really reasonably usable from threads-aware code.) */
if (connect(fd, &nscd_sa.sa, SOCKADDR_UN_LEN(nscd_sa.un)) < 0) {
if (errno == EAGAIN)
return log_debug_errno(errno, "nscd is overloaded (backlog limit reached) and refuses to take further connections: %m");
if (errno != EINPROGRESS)
return log_debug_errno(errno, "Failed to connect to nscd socket: %m");
r = connect_unix_path(fd, AT_FDCWD, "/run/nscd/socket");
if (r < 0) {
if (r == -EAGAIN)
return log_debug_errno(r, "nscd is overloaded (backlog limit reached) and refuses to take further connections: %m");
if (r != -EINPROGRESS)
return log_debug_errno(r, "Failed to connect to nscd socket: %m");
/* Continue in case of EINPROGRESS, but don't bother with send() or recv() until being notified that
* establishing the connection is complete. */

24
src/shared/varlink.c
View File

@ -271,17 +271,11 @@ static int varlink_new(Varlink **ret) {
int varlink_connect_address(Varlink **ret, const char *address) {
_cleanup_(varlink_unrefp) Varlink *v = NULL;
union sockaddr_union sockaddr;
socklen_t sockaddr_len;
int r;
assert_return(ret, -EINVAL);
assert_return(address, -EINVAL);
r = sockaddr_un_set_path(&sockaddr.un, address);
if (r < 0)
return log_debug_errno(r, "Failed to set socket address '%s': %m", address);
sockaddr_len = r;
r = varlink_new(&v);
if (r < 0)
return log_debug_errno(r, "Failed to create varlink object: %m");
@ -292,9 +286,21 @@ int varlink_connect_address(Varlink **ret, const char *address) {
v->fd = fd_move_above_stdio(v->fd);
if (connect(v->fd, &sockaddr.sa, sockaddr_len) < 0) {
if (!IN_SET(errno, EAGAIN, EINPROGRESS))
return log_debug_errno(errno, "Failed to connect to %s: %m", address);
r = sockaddr_un_set_path(&sockaddr.un, address);
if (r < 0) {
if (r != -ENAMETOOLONG)
return log_debug_errno(r, "Failed to set socket address '%s': %m", address);
/* This is a file system path, and too long to fit into sockaddr_un. Let's connect via O_PATH
* to this socket. */
r = connect_unix_path(v->fd, AT_FDCWD, address);
} else
r = RET_NERRNO(connect(v->fd, &sockaddr.sa, r));
if (r < 0) {
if (!IN_SET(r, -EAGAIN, -EINPROGRESS))
return log_debug_errno(r, "Failed to connect to %s: %m", address);
v->connecting = true; /* We are asynchronously connecting, i.e. the connect() is being
* processed in the background. As long as that's the case the socket

12
src/userdb/userdbctl.c
View File

@ -942,25 +942,19 @@ static int display_services(int argc, char *argv[], void *userdata) {
FOREACH_DIRENT(de, d, return -errno) {
_cleanup_free_ char *j = NULL, *no = NULL;
union sockaddr_union sockaddr;
socklen_t sockaddr_len;
_cleanup_close_ int fd = -1;
j = path_join("/run/systemd/userdb/", de->d_name);
if (!j)
return log_oom();
r = sockaddr_un_set_path(&sockaddr.un, j);
if (r < 0)
return log_error_errno(r, "Path %s does not fit in AF_UNIX socket address: %m", j);
sockaddr_len = r;
fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (fd < 0)
return log_error_errno(errno, "Failed to allocate AF_UNIX/SOCK_STREAM socket: %m");
if (connect(fd, &sockaddr.sa, sockaddr_len) < 0) {
no = strjoin("No (", errno_to_name(errno), ")");
r = connect_unix_path(fd, dirfd(d), de->d_name);
if (r < 0) {
no = strjoin("No (", errno_to_name(r), ")");
if (!no)
return log_oom();
}