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+.TH IREAD 3
+.SH NAME
+iread \- insistent read
+.SH SYNOPSIS
+.B read(fildes, buf, n)
+.B char *buf;
+.SH DESCRIPTION
+.I Iread,
+like
+.IR read (1),
+reads
+.I n
+bytes from the file associated with the given file descriptor
+into the block of store beginning at
+.I buf.
+.I Iread,
+however, always places exactly
+.I n
+bytes in
+.I buf,
+unless 
+.I read
+would return 0.
+.PP
+.I Iread
+returns the number of bytes placed in
+.I buf,
+which is an integer in the range 
+.RI 0- n.
+.SH DIAGNOSTICS
+.I Iread
+returns \-1 for an error; see
+.IR read (1).
+.SH SEE ALSO
+read(2)