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diff --git a/man/man3/pipe.html b/man/man3/pipe.html new file mode 100644 index 00000000..b087ae8b --- /dev/null +++ b/man/man3/pipe.html @@ -0,0 +1,111 @@ +<head> +<title>pipe(3) - Plan 9 from User Space</title> +<meta content="text/html; charset=utf-8" http-equiv=Content-Type> +</head> +<body bgcolor=#ffffff> +<table border=0 cellpadding=0 cellspacing=0 width=100%> +<tr height=10><td> +<tr><td width=20><td> +<tr><td width=20><td><b>PIPE(3)</b><td align=right><b>PIPE(3)</b> +<tr><td width=20><td colspan=2> + <br> +<p><font size=+1><b>NAME </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + pipe – create an interprocess channel<br> + +</table> +<p><font size=+1><b>SYNOPSIS </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>#include <u.h><br> + #include <libc.h> + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + </font></tt> + <tt><font size=+1>int pipe(int fd[2])<br> + </font></tt> +</table> +<p><font size=+1><b>DESCRIPTION </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <i>Pipe</i> creates a buffered channel for interprocess I/O communication. + Two file descriptors are returned in <i>fd</i>. Data written to <tt><font size=+1>fd[1]</font></tt> + is available for reading from <tt><font size=+1>fd[0]</font></tt> and data written to <tt><font size=+1>fd[0]</font></tt> + is available for reading from <tt><font size=+1>fd[1]</font></tt>. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + After the pipe has been established, cooperating processes created + by subsequent <a href="../man2/fork.html"><i>fork</i>(2)</a> calls may pass data through the pipe with + <i>read</i> and <i>write</i> calls. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + When all the data has been read from a pipe and the writer has + closed the pipe or exited, <a href="../man3/read.html"><i>read</i>(3)</a> will return 0 bytes. Writes + to a pipe with no reader will generate a note <tt><font size=+1>sys: write on closed + pipe</font></tt>.<br> + +</table> +<p><font size=+1><b>SOURCE </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>/usr/local/plan9/src/lib9/pipe.c<br> + </font></tt> +</table> +<p><font size=+1><b>SEE ALSO </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <a href="../man3/intro.html"><i>intro</i>(3)</a>, <a href="../man3/read.html"><i>read</i>(3)</a><br> + +</table> +<p><font size=+1><b>DIAGNOSTICS </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Sets <i>errstr</i>.<br> + +</table> +<p><font size=+1><b>BUGS </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + If a read or a write of a pipe is interrupted, some unknown number + of bytes may have been transferred. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <i>Pipe</i> is a macro defined as <i>p9pipe</i> to avoid name conflicts with + Unix’s <i>pipe</i> system call. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + Unix pipes are not guaranteed to be bidirectional. In order to + ensure a bidirectional channel, <i>p9pipe</i> creates Unix domain sockets + via the <a href="../man2/socketpair.html"><i>socketpair</i>(2)</a> instead of Unix pipes. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + The implementation of pipes as Unix domain sockets causes problems + with some Unix implementations of <tt><font size=+1>/dev/fd</font></tt>, Unix’s dup device. + If a Unix domain socket is open as file descriptor 0, some implementations + disallow the opening of <tt><font size=+1>/dev/fd/0</font></tt>; instead one must <a href="../man2/connect.html"><i>connect</i>(2)</a> + to it. If this functionality is important + (as it is for <a href="../man1/rc.html"><i>rc</i>(1)</a>), one must <tt><font size=+1>#undef pipe</font></tt> and fall back on the + (possibly unidirectional) Unix pipes.<br> + +</table> + +<td width=20> +<tr height=20><td> +</table> +<!-- TRAILER --> +<table border=0 cellpadding=0 cellspacing=0 width=100%> +<tr height=15><td width=10><td><td width=10> +<tr><td><td> +<center> +<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a> +</center> +</table> +<!-- TRAILER --> +</body></html> |