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The C and C++ Include Header Files

/usr/include/linux/close_range.h


$ cat -n /usr/include/linux/close_range.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _LINUX_CLOSE_RANGE_H
     3	#define _LINUX_CLOSE_RANGE_H
     4	
     5	/* Unshare the file descriptor table before closing file descriptors. */
     6	#define CLOSE_RANGE_UNSHARE	(1U << 1)
     7	
     8	/* Set the FD_CLOEXEC bit instead of closing the file descriptor. */
     9	#define CLOSE_RANGE_CLOEXEC	(1U << 2)
    10	
    11	#endif /* _LINUX_CLOSE_RANGE_H */
    12