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/usr/include/asm-generic/sockios.h is in linux-libc-dev 4.15.0-20.21.

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __ASM_GENERIC_SOCKIOS_H
#define __ASM_GENERIC_SOCKIOS_H

/* Socket-level I/O control calls. */
#define FIOSETOWN	0x8901
#define SIOCSPGRP	0x8902
#define FIOGETOWN	0x8903
#define SIOCGPGRP	0x8904
#define SIOCATMARK	0x8905
#define SIOCGSTAMP	0x8906		/* Get stamp (timeval) */
#define SIOCGSTAMPNS	0x8907		/* Get stamp (timespec) */

#endif /* __ASM_GENERIC_SOCKIOS_H */