cgroup: don't trim a cgroup we create, we might just take it over from somebody else

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

diff --git a/src/sd-daemon.c b/src/sd-daemon.c
index b30db5d5b33ab259a4649108b049798b78424930..a2ec74cceb59a744f9bec7486972832896cdb2ff 100644 (file)
--- a/src/sd-daemon.c
+++ b/src/sd-daemon.c
@@ -49,7 +49,13 @@
 
 #include "sd-daemon.h"
 
-int sd_listen_fds(int unset_environment) {
+#if (__GNUC__ >= 4) && !defined(SD_EXPORT_SYMBOLS)
+#define _sd_hidden_ __attribute__ ((visibility("hidden")))
+#else
+#define _sd_hidden_
+#endif
+
+_sd_hidden_ int sd_listen_fds(int unset_environment) {
 
 #if defined(DISABLE_SYSTEMD) || !defined(__linux__)
         return 0;
@@ -130,7 +136,7 @@ finish:
 #endif
 }
 
-int sd_is_fifo(int fd, const char *path) {
+_sd_hidden_ int sd_is_fifo(int fd, const char *path) {
         struct stat st_fd;
 
         if (fd < 0)
@@ -163,6 +169,42 @@ int sd_is_fifo(int fd, const char *path) {
         return 1;
 }
 
+_sd_hidden_ 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;
 
@@ -214,7 +256,7 @@ union sockaddr_union {
         struct sockaddr_storage storage;
 };
 
-int sd_is_socket(int fd, int family, int type, int listening) {
+_sd_hidden_ int sd_is_socket(int fd, int family, int type, int listening) {
         int r;
 
         if (family < 0)
@@ -242,7 +284,7 @@ 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_hidden_ 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;
@@ -287,7 +329,7 @@ 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_hidden_ 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;
@@ -330,7 +372,7 @@ int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t
         return 1;
 }
 
-int sd_is_mq(int fd, const char *path) {
+_sd_hidden_ int sd_is_mq(int fd, const char *path) {
 #if !defined(__linux__)
         return 0;
 #else
@@ -367,7 +409,7 @@ int sd_is_mq(int fd, const char *path) {
 #endif
 }
 
-int sd_notify(int unset_environment, const char *state) {
+_sd_hidden_ int sd_notify(int unset_environment, const char *state) {
 #if defined(DISABLE_SYSTEMD) || !defined(__linux__) || !defined(SOCK_CLOEXEC)
         return 0;
 #else
@@ -435,7 +477,7 @@ finish:
 #endif
 }
 
-int sd_notifyf(int unset_environment, const char *format, ...) {
+_sd_hidden_ int sd_notifyf(int unset_environment, const char *format, ...) {
 #if defined(DISABLE_SYSTEMD) || !defined(__linux__)
         return 0;
 #else
@@ -457,7 +499,7 @@ int sd_notifyf(int unset_environment, const char *format, ...) {
 #endif
 }
 
-int sd_booted(void) {
+_sd_hidden_ int sd_booted(void) {
 #if defined(DISABLE_SYSTEMD) || !defined(__linux__)
         return 0;
 #else