.TH unistd.h "" "" "Header File"
.PC "Define constants for file-handling routines"
.B "#include <unistd.h>"
.PP
The header file
.B unistd.h
defines standard routines used by the \*(UN and \*(UN-like operating systems.
It prototypes many commonly used functions, and declares
manifest constants used when
checking file access, setting the seek pointer, and locking files.
.SH "See Also"
.Xr "access()," access
.Xr "fseek()," fseek
.Xr "header files," header_fi
.Xr "lockf()" lockf
.br
\*(PX Standard, \(sc2.9
