add prototype for dn_skipname

[musl] / src / fcntl / fcntl.c

diff --git a/src/fcntl/fcntl.c b/src/fcntl/fcntl.c
index 2c9fb6f..390ef75 100644 (file)
--- a/src/fcntl/fcntl.c
+++ b/src/fcntl/fcntl.c
@@ -1,6 +1,8 @@
+#define _GNU_SOURCE
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdarg.h>
+#include <errno.h>
 #include "syscall.h"
 #include "libc.h"
 
@@ -13,7 +15,28 @@ int fcntl(int fd, int cmd, ...)
        va_end(ap);
        if (cmd == F_SETFL) arg |= O_LARGEFILE;
        if (cmd == F_SETLKW) return syscall_cp(SYS_fcntl, fd, cmd, arg);
+       if (cmd == F_GETOWN) {
+               struct f_owner_ex ex;
+               int ret = __syscall(SYS_fcntl, fd, F_GETOWN_EX, &ex);
+               if (ret == -EINVAL) return __syscall(SYS_fcntl, fd, cmd, arg);
+               if (ret) return __syscall_ret(ret);
+               return ex.type == F_OWNER_PGRP ? -ex.pid : ex.pid;
+       }
+       if (cmd == F_DUPFD_CLOEXEC) {
+               int ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, arg);
+               if (ret != -EINVAL) {
+                       if (ret >= 0)
+                               __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
+                       return __syscall_ret(ret);
+               }
+               ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, 0);
+               if (ret != -EINVAL) {
+                       if (ret >= 0) __syscall(SYS_close, ret);
+                       return __syscall_ret(-EINVAL);
+               }
+               ret = __syscall(SYS_fcntl, fd, F_DUPFD, arg);
+               if (ret >= 0) __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
+               return __syscall_ret(ret);
+       }
        return syscall(SYS_fcntl, fd, cmd, arg);
 }
-
-LFS64(fcntl);