/usr/include/skalibs/selfpipe.h is in skalibs-dev 0.47-1.
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 | /* Public domain. */
#ifndef SELFPIPE_H
#define SELFPIPE_H
extern int selfpipe_init (void) ; /* returns -1 or fd to select on */
extern int selfpipe_trap (int) ;
extern int selfpipe_read (void) ;
extern void selfpipe_finish (void) ;
#endif
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