tree-wide: port things over to FORMAT_PROC_FD_PATH()

src/basic/fd-util.c

@@ -433,11 +433,9 @@ bool fdname_is_valid(const char *s) {
 }
 
 int fd_get_path(int fd, char **ret) {
-        char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
         int r;
 
-        xsprintf(procfs_path, "/proc/self/fd/%i", fd);
-        r = readlink_malloc(procfs_path, ret);
+        r = readlink_malloc(FORMAT_PROC_FD_PATH(fd), ret);
         if (r == -ENOENT) {
                 /* ENOENT can mean two things: that the fd does not exist or that /proc is not mounted. Let's make
                  * things debuggable and distinguish the two. */
@@ -647,7 +645,6 @@ finish:
 }
 
 int fd_reopen(int fd, int flags) {
-        char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
         int new_fd;
 
         /* Reopens the specified fd with new flags. This is useful for convert an O_PATH fd into a regular one, or to
@@ -657,8 +654,7 @@ int fd_reopen(int fd, int flags) {
          *
          * This implicitly resets the file read index to 0. */
 
-        xsprintf(procfs_path, "/proc/self/fd/%i", fd);
-        new_fd = open(procfs_path, flags);
+        new_fd = open(FORMAT_PROC_FD_PATH(fd), flags);
         if (new_fd < 0) {
                 if (errno != ENOENT)
                         return -errno;