flag parameters: dup2

[cascardo/linux.git] / fs / fcntl.c

diff --git a/fs/fcntl.c b/fs/fcntl.c
index 330a7d7..9679fcb 100644 (file)
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -125,13 +125,16 @@ static int dupfd(struct file *file, unsigned int start, int cloexec)
        return fd;
 }
 
-asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
+asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags)
 {
        int err = -EBADF;
        struct file * file, *tofree;
        struct files_struct * files = current->files;
        struct fdtable *fdt;
 
+       if ((flags & ~O_CLOEXEC) != 0)
+               return -EINVAL;
+
        spin_lock(&files->file_lock);
        if (!(file = fcheck(oldfd)))
                goto out_unlock;
@@ -163,7 +166,10 @@ asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
 
        rcu_assign_pointer(fdt->fd[newfd], file);
        FD_SET(newfd, fdt->open_fds);
-       FD_CLR(newfd, fdt->close_on_exec);
+       if (flags & O_CLOEXEC)
+               FD_SET(newfd, fdt->close_on_exec);
+       else
+               FD_CLR(newfd, fdt->close_on_exec);
        spin_unlock(&files->file_lock);
 
        if (tofree)
@@ -181,6 +187,11 @@ out_fput:
        goto out;
 }
 
+asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
+{
+       return sys_dup3(oldfd, newfd, 0);
+}
+
 asmlinkage long sys_dup(unsigned int fildes)
 {
        int ret = -EBADF;