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path: root/dbus/sd-daemon.c
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Diffstat (limited to 'dbus/sd-daemon.c')
-rw-r--r--dbus/sd-daemon.c193
1 files changed, 139 insertions, 54 deletions
diff --git a/dbus/sd-daemon.c b/dbus/sd-daemon.c
index 9c23b917..485b3010 100644
--- a/dbus/sd-daemon.c
+++ b/dbus/sd-daemon.c
@@ -25,14 +25,14 @@
***/
#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
+# define _GNU_SOURCE
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
-#include <sys/fcntl.h>
+#include <fcntl.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <errno.h>
@@ -40,10 +40,28 @@
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
+#include <stddef.h>
+#include <limits.h>
+
+#if defined(__linux__) && !defined(SD_DAEMON_DISABLE_MQ)
+# include <mqueue.h>
+#endif
#include "sd-daemon.h"
-int sd_listen_fds(int unset_environment) {
+#if (__GNUC__ >= 4)
+# ifdef SD_EXPORT_SYMBOLS
+/* Export symbols */
+# define _sd_export_ __attribute__ ((visibility("default")))
+# else
+/* Don't export the symbols */
+# define _sd_export_ __attribute__ ((visibility("hidden")))
+# endif
+#else
+# define _sd_export_
+#endif
+
+_sd_export_ int sd_listen_fds(int unset_environment) {
#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
return 0;
@@ -53,7 +71,8 @@ int sd_listen_fds(int unset_environment) {
char *p = NULL;
unsigned long l;
- if (!(e = getenv("LISTEN_PID"))) {
+ e = getenv("LISTEN_PID");
+ if (!e) {
r = 0;
goto finish;
}
@@ -61,12 +80,12 @@ int sd_listen_fds(int unset_environment) {
errno = 0;
l = strtoul(e, &p, 10);
- if (errno != 0) {
+ if (errno > 0) {
r = -errno;
goto finish;
}
- if (!p || *p || l <= 0) {
+ if (!p || p == e || *p || l <= 0) {
r = -EINVAL;
goto finish;
}
@@ -77,7 +96,8 @@ int sd_listen_fds(int unset_environment) {
goto finish;
}
- if (!(e = getenv("LISTEN_FDS"))) {
+ e = getenv("LISTEN_FDS");
+ if (!e) {
r = 0;
goto finish;
}
@@ -85,12 +105,12 @@ int sd_listen_fds(int unset_environment) {
errno = 0;
l = strtoul(e, &p, 10);
- if (errno != 0) {
+ if (errno > 0) {
r = -errno;
goto finish;
}
- if (!p || *p) {
+ if (!p || p == e || *p) {
r = -EINVAL;
goto finish;
}
@@ -98,7 +118,8 @@ int sd_listen_fds(int unset_environment) {
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) l; fd ++) {
int flags;
- if ((flags = fcntl(fd, F_GETFD)) < 0) {
+ flags = fcntl(fd, F_GETFD);
+ if (flags < 0) {
r = -errno;
goto finish;
}
@@ -124,13 +145,12 @@ finish:
#endif
}
-int sd_is_fifo(int fd, const char *path) {
+_sd_export_ int sd_is_fifo(int fd, const char *path) {
struct stat st_fd;
if (fd < 0)
return -EINVAL;
- memset(&st_fd, 0, sizeof(st_fd));
if (fstat(fd, &st_fd) < 0)
return -errno;
@@ -140,7 +160,6 @@ int sd_is_fifo(int fd, const char *path) {
if (path) {
struct stat st_path;
- memset(&st_path, 0, sizeof(st_path));
if (stat(path, &st_path) < 0) {
if (errno == ENOENT || errno == ENOTDIR)
@@ -157,6 +176,42 @@ int sd_is_fifo(int fd, const char *path) {
return 1;
}
+_sd_export_ int sd_is_special(int fd, const char *path) {
+ struct stat st_fd;
+
+ if (fd < 0)
+ return -EINVAL;
+
+ 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;
@@ -208,21 +263,19 @@ union sockaddr_union {
struct sockaddr_storage storage;
};
-int sd_is_socket(int fd, int family, int type, int listening) {
+_sd_export_ int sd_is_socket(int fd, int family, int type, int listening) {
int r;
if (family < 0)
return -EINVAL;
- if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ r = sd_is_socket_internal(fd, type, listening);
+ if (r <= 0)
return r;
if (family > 0) {
- union sockaddr_union sockaddr;
- socklen_t l;
-
- memset(&sockaddr, 0, sizeof(sockaddr));
- l = sizeof(sockaddr);
+ union sockaddr_union sockaddr = {};
+ socklen_t l = sizeof(sockaddr);
if (getsockname(fd, &sockaddr.sa, &l) < 0)
return -errno;
@@ -236,20 +289,18 @@ int sd_is_socket(int fd, int family, int type, int listening) {
return 1;
}
-int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) {
- union sockaddr_union sockaddr;
- socklen_t l;
+_sd_export_ 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;
if (family != 0 && family != AF_INET && family != AF_INET6)
return -EINVAL;
- if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ r = sd_is_socket_internal(fd, type, listening);
+ if (r <= 0)
return r;
- memset(&sockaddr, 0, sizeof(sockaddr));
- l = sizeof(sockaddr);
-
if (getsockname(fd, &sockaddr.sa, &l) < 0)
return -errno;
@@ -281,17 +332,15 @@ int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port
return 1;
}
-int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
- union sockaddr_union sockaddr;
- socklen_t l;
+_sd_export_ 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;
- if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ r = sd_is_socket_internal(fd, type, listening);
+ if (r <= 0)
return r;
- memset(&sockaddr, 0, sizeof(sockaddr));
- l = sizeof(sockaddr);
-
if (getsockname(fd, &sockaddr.sa, &l) < 0)
return -errno;
@@ -302,29 +351,66 @@ int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t
return 0;
if (path) {
- if (length <= 0)
+ if (length == 0)
length = strlen(path);
- if (length <= 0)
+ if (length == 0)
/* Unnamed socket */
- return l == sizeof(sa_family_t);
+ return l == offsetof(struct sockaddr_un, sun_path);
if (path[0])
/* Normal path socket */
return
- (l >= sizeof(sa_family_t) + length + 1) &&
+ (l >= offsetof(struct sockaddr_un, sun_path) + length + 1) &&
memcmp(path, sockaddr.un.sun_path, length+1) == 0;
else
/* Abstract namespace socket */
return
- (l == sizeof(sa_family_t) + length) &&
+ (l == offsetof(struct sockaddr_un, sun_path) + length) &&
memcmp(path, sockaddr.un.sun_path, length) == 0;
}
return 1;
}
-int sd_notify(int unset_environment, const char *state) {
+_sd_export_ int sd_is_mq(int fd, const char *path) {
+#if !defined(__linux__) || defined(SD_DAEMON_DISABLE_MQ)
+ return 0;
+#else
+ struct mq_attr attr;
+
+ if (fd < 0)
+ return -EINVAL;
+
+ if (mq_getattr(fd, &attr) < 0)
+ return -errno;
+
+ if (path) {
+ char fpath[PATH_MAX];
+ struct stat a, b;
+
+ if (path[0] != '/')
+ return -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
+}
+
+_sd_export_ int sd_notify(int unset_environment, const char *state) {
#if defined(DISABLE_SYSTEMD) || !defined(__linux__) || !defined(SOCK_CLOEXEC)
return 0;
#else
@@ -339,7 +425,8 @@ int sd_notify(int unset_environment, const char *state) {
goto finish;
}
- if (!(e = getenv("NOTIFY_SOCKET")))
+ e = getenv("NOTIFY_SOCKET");
+ if (!e)
return 0;
/* Must be an abstract socket, or an absolute path */
@@ -348,7 +435,8 @@ int sd_notify(int unset_environment, const char *state) {
goto finish;
}
- if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) {
+ fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ if (fd < 0) {
r = -errno;
goto finish;
}
@@ -366,7 +454,7 @@ int sd_notify(int unset_environment, const char *state) {
memset(&msghdr, 0, sizeof(msghdr));
msghdr.msg_name = &sockaddr;
- msghdr.msg_namelen = sizeof(sa_family_t) + strlen(e);
+ 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);
@@ -392,7 +480,7 @@ finish:
#endif
}
-int sd_notifyf(int unset_environment, const char *format, ...) {
+_sd_export_ int sd_notifyf(int unset_environment, const char *format, ...) {
#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
return 0;
#else
@@ -414,22 +502,19 @@ int sd_notifyf(int unset_environment, const char *format, ...) {
#endif
}
-int sd_booted(void) {
+_sd_export_ int sd_booted(void) {
#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
return 0;
#else
+ struct stat st;
- struct stat a, b;
-
- /* We simply test whether the systemd cgroup hierarchy is
- * mounted */
-
- if (lstat("/sys/fs/cgroup", &a) < 0)
- return 0;
+ /* 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("/sys/fs/cgroup/systemd", &b) < 0)
+ if (lstat("/run/systemd/system/", &st) < 0)
return 0;
- return a.st_dev != b.st_dev;
+ return !!S_ISDIR(st.st_mode);
#endif
}
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