sd-daemon: rework documentation a little

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

diff --git a/src/sd-daemon.c b/src/sd-daemon.c
index ad2bfa82e72f4e76e9d46edb069a35c14459b9ec..29bd20468001a012417ba7e3e686512b4454c803 100644 (file)
--- a/src/sd-daemon.c
+++ b/src/sd-daemon.c
@@ -28,6 +28,7 @@
 #include <sys/stat.h>
 #include <sys/socket.h>
 #include <sys/un.h>
+#include <sys/fcntl.h>
 #include <netinet/in.h>
 #include <stdlib.h>
 #include <errno.h>
@@ -41,7 +42,7 @@ int sd_listen_fds(int unset_environment) {
 #ifdef DISABLE_SYSTEMD
         return 0;
 #else
-        int r;
+        int r, fd;
         const char *e;
         char *p = NULL;
         unsigned long l;
@@ -88,6 +89,23 @@ int sd_listen_fds(int unset_environment) {
                 goto finish;
         }
 
+        for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) l; fd ++) {
+                int flags;
+
+                if ((flags = fcntl(fd, F_GETFD)) < 0) {
+                        r = -errno;
+                        goto finish;
+                }
+
+                if (flags & FD_CLOEXEC)
+                        continue;
+
+                if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
+                        r = -errno;
+                        goto finish;
+                }
+        }
+
         r = (int) l;
 
 finish:
@@ -133,7 +151,7 @@ int sd_is_fifo(int fd, const char *path) {
         return 1;
 }
 
-int sd_is_socket(int fd, int type, int listening) {
+static int sd_is_socket_internal(int fd, int type, int listening) {
         struct stat st_fd;
 
         if (fd < 0 || type < 0)
@@ -176,18 +194,51 @@ int sd_is_socket(int fd, int type, int listening) {
         return 1;
 }
 
-int sd_is_socket_inet(int fd, int type, int listening, uint16_t port) {
-        union {
-                struct sockaddr sa;
-                struct sockaddr_in in4;
-                struct sockaddr_in6 in6;
-                struct sockaddr_un un;
-                struct sockaddr_storage storage;
-        } sockaddr;
+union sockaddr_union {
+        struct sockaddr sa;
+        struct sockaddr_in in4;
+        struct sockaddr_in6 in6;
+        struct sockaddr_un un;
+        struct sockaddr_storage storage;
+};
+
+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)
+                return r;
+
+        if (family > 0) {
+                union sockaddr_union sockaddr;
+                socklen_t l;
+
+                memset(&sockaddr, 0, sizeof(sockaddr));
+                l = sizeof(sockaddr);
+
+                if (getsockname(fd, &sockaddr.sa, &l) < 0)
+                        return -errno;
+
+                if (l < sizeof(sa_family_t))
+                        return -EINVAL;
+
+                return sockaddr.sa.sa_family == family;
+        }
+
+        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;
         int r;
 
-        if ((r = sd_is_socket(fd, type, listening)) <= 0)
+        if (family != 0 && family != AF_INET && family != AF_INET6)
+                return -EINVAL;
+
+        if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
                 return r;
 
         memset(&sockaddr, 0, sizeof(sockaddr));
@@ -196,13 +247,17 @@ int sd_is_socket_inet(int fd, int type, int listening, uint16_t port) {
         if (getsockname(fd, &sockaddr.sa, &l) < 0)
                 return -errno;
 
-        if (l < sizeof(struct sockaddr))
+        if (l < sizeof(sa_family_t))
                 return -EINVAL;
 
         if (sockaddr.sa.sa_family != AF_INET &&
             sockaddr.sa.sa_family != AF_INET6)
                 return 0;
 
+        if (family > 0)
+                if (sockaddr.sa.sa_family != family)
+                        return 0;
+
         if (port > 0) {
                 if (sockaddr.sa.sa_family == AF_INET) {
                         if (l < sizeof(struct sockaddr_in))
@@ -221,17 +276,11 @@ int sd_is_socket_inet(int fd, int type, int listening, uint16_t port) {
 }
 
 int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
-        union {
-                struct sockaddr sa;
-                struct sockaddr_in in4;
-                struct sockaddr_in6 in6;
-                struct sockaddr_un un;
-                struct sockaddr_storage storage;
-        } sockaddr;
+        union sockaddr_union sockaddr;
         socklen_t l;
         int r;
 
-        if ((r = sd_is_socket(fd, type, listening)) <= 0)
+        if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
                 return r;
 
         memset(&sockaddr, 0, sizeof(sockaddr));