dbus: the changes array might actually be NULL when ti is empty

[elogind.git] / src / sd-daemon.c

diff --git a/src/sd-daemon.c b/src/sd-daemon.c
index e12fb0483abfb8c4d690ffc62ee51622daa245fb..e68b70875c749a22dcbbfc6d7338d2c848f3a317 100644 (file)
--- a/src/sd-daemon.c
+++ b/src/sd-daemon.c
@@ -41,10 +41,27 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stddef.h>
+#include <limits.h>
+
+#if defined(__linux__)
+#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;
@@ -125,7 +142,7 @@ 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)
@@ -158,6 +175,42 @@ 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;
 
@@ -209,7 +262,7 @@ 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)
@@ -228,7 +281,7 @@ int sd_is_socket(int fd, int family, int type, int listening) {
                 if (getsockname(fd, &sockaddr.sa, &l) < 0)
                         return -errno;
 
-                if (l < offsetof(struct sockaddr_un, sun_path))
+                if (l < sizeof(sa_family_t))
                         return -EINVAL;
 
                 return sockaddr.sa.sa_family == family;
@@ -237,7 +290,7 @@ 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) {
+_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;
         int r;
@@ -254,7 +307,7 @@ int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port
         if (getsockname(fd, &sockaddr.sa, &l) < 0)
                 return -errno;
 
-        if (l < offsetof(struct sockaddr_un, sun_path))
+        if (l < sizeof(sa_family_t))
                 return -EINVAL;
 
         if (sockaddr.sa.sa_family != AF_INET &&
@@ -282,7 +335,7 @@ 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) {
+_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;
         int r;
@@ -296,7 +349,7 @@ int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t
         if (getsockname(fd, &sockaddr.sa, &l) < 0)
                 return -errno;
 
-        if (l < offsetof(struct sockaddr_un, sun_path))
+        if (l < sizeof(sa_family_t))
                 return -EINVAL;
 
         if (sockaddr.sa.sa_family != AF_UNIX)
@@ -325,7 +378,44 @@ int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t
         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__)
+        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
@@ -393,7 +483,7 @@ 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
@@ -415,7 +505,7 @@ 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