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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/shared/ask-password-api.c
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/shared/ask-password-api.c')
-rw-r--r--src/shared/ask-password-api.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/shared/ask-password-api.c b/src/shared/ask-password-api.c
index 6805873f9e..4a4bd8d3b8 100644
--- a/src/shared/ask-password-api.c
+++ b/src/shared/ask-password-api.c
@@ -431,7 +431,7 @@ static int create_socket(char **name) {
snprintf(sa.un.sun_path, sizeof(sa.un.sun_path)-1, "/run/systemd/ask-password/sck.%" PRIx64, random_u64());
RUN_WITH_UMASK(0177) {
- if (bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0)
+ if (bind(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0)
return -errno;
}