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.TH io_readfile 3
io_readfile \- open a file for reading
.B #include <io.h>
int \fBio_readfile\fP(int64* d,const char* s);
io_readfile sets d to the number of a new descriptor reading from the
disk file named \fIs\fR, and returns 1.
If something goes wrong, io_readfile sets \fIerrno\fR to indicate the error, and
returns 0; it does not create a new descriptor, and it does not touch d.
io_createfilefile(3), io_appendfile(3), io_readwritefile(3)