/usr/include/x86_64-linux-musl/sys/sendfile.h is in musl-dev 0.9.15-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | #ifndef _SYS_SENDFILE_H
#define _SYS_SENDFILE_H
#ifdef __cplusplus
extern "C" {
#endif
#include <features.h>
#include <unistd.h>
ssize_t sendfile(int, int, off_t *, size_t);
#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
#define sendfile64 sendfile
#define off64_t off_t
#endif
#ifdef __cplusplus
}
#endif
#endif
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