tree-wide: introduce PIPE_EBADF macro

[thirdparty/systemd.git] / src / basic / fd-util.h

diff --git a/src/basic/fd-util.h b/src/basic/fd-util.h
index dd5207bd88a8c84fd851fae5c96c0543b81b023a..1faefe6a0e6b1682f404971183c37ebc1a6f1923 100644 (file)
--- a/src/basic/fd-util.h
+++ b/src/basic/fd-util.h
@@ -15,6 +15,7 @@
 /* Make sure we can distinguish fd 0 and NULL */
 #define FD_TO_PTR(fd) INT_TO_PTR((fd)+1)
 #define PTR_TO_FD(p) (PTR_TO_INT(p)-1)
+#define PIPE_EBADF { -EBADF, -EBADF }
 
 int close_nointr(int fd);
 int safe_close(int fd);
@@ -56,6 +57,7 @@ DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(DIR*, closedir, NULL);
 
 int fd_nonblock(int fd, bool nonblock);
 int fd_cloexec(int fd, bool cloexec);
+int fd_cloexec_many(const int fds[], size_t n_fds, bool cloexec);
 
 int get_max_fd(void);
 
@@ -91,13 +93,14 @@ static inline int make_null_stdio(void) {
 /* Like TAKE_PTR() but for file descriptors, resetting them to -1 */
 #define TAKE_FD(fd)                             \
         ({                                      \
-                int _fd_ = (fd);                \
-                (fd) = -1;                      \
-                _fd_;                           \
+                int *_fd_ = &(fd);              \
+                int _ret_ = *_fd_;              \
+                *_fd_ = -EBADF;                 \
+                _ret_;                          \
         })
 
 /* Like free_and_replace(), but for file descriptors */
-#define CLOSE_AND_REPLACE(a, b)                 \
+#define close_and_replace(a, b)                 \
         ({                                      \
                 int *_fdp_ = &(a);              \
                 safe_close(*_fdp_);             \
@@ -106,8 +109,9 @@ static inline int make_null_stdio(void) {
         })
 
 int fd_reopen(int fd, int flags);
+int fd_reopen_condition(int fd, int flags, int mask, int *ret_new_fd);
 int read_nr_open(void);
-int btrfs_defrag_fd(int fd);
+int fd_get_diskseq(int fd, uint64_t *ret);
 
 /* The maximum length a buffer for a /proc/self/fd/<fd> path needs */
 #define PROC_FD_PATH_MAX \