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authorLennart Poettering <lennart@poettering.net>2016-05-05 22:24:36 +0200
committerLennart Poettering <lennart@poettering.net>2016-05-05 22:24:36 +0200
commitfc2fffe7706ef269005bf4eef56570346c9ca3da (patch)
tree9e89ac76ee15de498d97b0d03ed7d764b61874ce /src/journal
parentd8fdc62037b5b0a9fd603ad5efd6b49f956f86b5 (diff)
tree-wide: introduce new SOCKADDR_UN_LEN() macro, and use it everywhere
The macro determines the right length of a AF_UNIX "struct sockaddr_un" to pass to connect() or bind(). It automatically figures out if the socket refers to an abstract namespace socket, or a socket in the file system, and properly handles the full length of the path field. This macro is not only safer, but also simpler to use, than the usual offsetof() + strlen() logic.
Diffstat (limited to 'src/journal')
-rw-r--r--src/journal/journal-send.c14
-rw-r--r--src/journal/journald-native.c14
-rw-r--r--src/journal/journald-server.c2
-rw-r--r--src/journal/journald-stream.c13
-rw-r--r--src/journal/journald-syslog.c18
5 files changed, 30 insertions, 31 deletions
diff --git a/src/journal/journal-send.c b/src/journal/journal-send.c
index f0959b6237..5e8a3e3200 100644
--- a/src/journal/journal-send.c
+++ b/src/journal/journal-send.c
@@ -208,13 +208,13 @@ _public_ int sd_journal_sendv(const struct iovec *iov, int n) {
struct iovec *w;
uint64_t *l;
int i, j = 0;
- struct sockaddr_un sa = {
- .sun_family = AF_UNIX,
- .sun_path = "/run/systemd/journal/socket",
+ static const union sockaddr_union sa = {
+ .un.sun_family = AF_UNIX,
+ .un.sun_path = "/run/systemd/journal/socket",
};
struct msghdr mh = {
- .msg_name = &sa,
- .msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(sa.sun_path),
+ .msg_name = (struct sockaddr*) &sa.sa,
+ .msg_namelen = SOCKADDR_UN_LEN(sa.un),
};
ssize_t k;
bool have_syslog_identifier = false;
@@ -392,7 +392,7 @@ _public_ int sd_journal_perror(const char *message) {
}
_public_ int sd_journal_stream_fd(const char *identifier, int priority, int level_prefix) {
- union sockaddr_union sa = {
+ static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/systemd/journal/stdout",
};
@@ -408,7 +408,7 @@ _public_ int sd_journal_stream_fd(const char *identifier, int priority, int leve
if (fd < 0)
return -errno;
- r = connect(fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
+ r = connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
if (r < 0)
return -errno;
diff --git a/src/journal/journald-native.c b/src/journal/journald-native.c
index a445291a5e..0a1ce205c2 100644
--- a/src/journal/journald-native.c
+++ b/src/journal/journald-native.c
@@ -448,24 +448,24 @@ void server_process_native_file(
}
int server_open_native_socket(Server*s) {
+
+ static const union sockaddr_union sa = {
+ .un.sun_family = AF_UNIX,
+ .un.sun_path = "/run/systemd/journal/socket",
+ };
static const int one = 1;
int r;
assert(s);
if (s->native_fd < 0) {
- union sockaddr_union sa = {
- .un.sun_family = AF_UNIX,
- .un.sun_path = "/run/systemd/journal/socket",
- };
-
s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (s->native_fd < 0)
return log_error_errno(errno, "socket() failed: %m");
- unlink(sa.un.sun_path);
+ (void) unlink(sa.un.sun_path);
- r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
+ r = bind(s->native_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
if (r < 0)
return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c
index e14d0ad980..8f82d2a838 100644
--- a/src/journal/journald-server.c
+++ b/src/journal/journald-server.c
@@ -1696,7 +1696,7 @@ static int server_connect_notify(Server *s) {
if (sa.un.sun_path[0] == '@')
sa.un.sun_path[0] = 0;
- r = connect(s->notify_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(e));
+ r = connect(s->notify_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
if (r < 0)
return log_error_errno(errno, "Failed to connect to notify socket: %m");
diff --git a/src/journal/journald-stream.c b/src/journal/journald-stream.c
index 59352bcb3f..4ad16ee41c 100644
--- a/src/journal/journald-stream.c
+++ b/src/journal/journald-stream.c
@@ -700,23 +700,22 @@ fail:
}
int server_open_stdout_socket(Server *s) {
+ static const union sockaddr_union sa = {
+ .un.sun_family = AF_UNIX,
+ .un.sun_path = "/run/systemd/journal/stdout",
+ };
int r;
assert(s);
if (s->stdout_fd < 0) {
- union sockaddr_union sa = {
- .un.sun_family = AF_UNIX,
- .un.sun_path = "/run/systemd/journal/stdout",
- };
-
s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (s->stdout_fd < 0)
return log_error_errno(errno, "socket() failed: %m");
- unlink(sa.un.sun_path);
+ (void) unlink(sa.un.sun_path);
- r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
+ r = bind(s->stdout_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
if (r < 0)
return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
diff --git a/src/journal/journald-syslog.c b/src/journal/journald-syslog.c
index 5153fd0cce..ead47887d8 100644
--- a/src/journal/journald-syslog.c
+++ b/src/journal/journald-syslog.c
@@ -52,8 +52,7 @@ static void forward_syslog_iovec(Server *s, const struct iovec *iovec, unsigned
.msg_iov = (struct iovec *) iovec,
.msg_iovlen = n_iovec,
.msg_name = (struct sockaddr*) &sa.sa,
- .msg_namelen = offsetof(union sockaddr_union, un.sun_path)
- + strlen("/run/systemd/journal/syslog"),
+ .msg_namelen = SOCKADDR_UN_LEN(sa.un),
};
struct cmsghdr *cmsg;
union {
@@ -383,24 +382,24 @@ void server_process_syslog_message(
}
int server_open_syslog_socket(Server *s) {
+
+ static const union sockaddr_union sa = {
+ .un.sun_family = AF_UNIX,
+ .un.sun_path = "/run/systemd/journal/dev-log",
+ };
static const int one = 1;
int r;
assert(s);
if (s->syslog_fd < 0) {
- static const union sockaddr_union sa = {
- .un.sun_family = AF_UNIX,
- .un.sun_path = "/run/systemd/journal/dev-log",
- };
-
s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (s->syslog_fd < 0)
return log_error_errno(errno, "socket() failed: %m");
- unlink(sa.un.sun_path);
+ (void) unlink(sa.un.sun_path);
- r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
+ r = bind(s->syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
if (r < 0)
return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
@@ -437,6 +436,7 @@ int server_open_syslog_socket(Server *s) {
void server_maybe_warn_forward_syslog_missed(Server *s) {
usec_t n;
+
assert(s);
if (s->n_forward_syslog_missed <= 0)