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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2014-09-18 20:03:23 +0000 |
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| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2014-09-18 20:03:23 +0000 |
| commit | f316a2ed52195135a35e32d7096e876357c48c69 (patch) | |
| tree | 5f4486b9a5a213a69e66ef574d6bc643a207981c /doc/fdblock.html | |
| download | execline-f316a2ed52195135a35e32d7096e876357c48c69.tar.xz | |
initial commit: rc for execline-2.0.0.0
Diffstat (limited to 'doc/fdblock.html')
| -rw-r--r-- | doc/fdblock.html | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/doc/fdblock.html b/doc/fdblock.html new file mode 100644 index 0000000..5b2bfa8 --- /dev/null +++ b/doc/fdblock.html @@ -0,0 +1,55 @@ +<html> + <head> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> + <meta http-equiv="Content-Language" content="en" /> + <title>execline: the fdblock program</title> + <meta name="Description" content="execline: the fdblock program" /> + <meta name="Keywords" content="execline command fdblock file descriptor blocking" /> + <!-- <link rel="stylesheet" type="text/css" href="http://skarnet.org/default.css" /> --> + </head> +<body> + +<p> +<a href="index.html">execline</a><br /> +<a href="http://skarnet.org/software/">Software</a><br /> +<a href="http://skarnet.org/">skarnet.org</a> +</p> + +<h1> The <tt>fdblock</tt> program </h1> + +<p> +<tt>fdblock</tt> sets or unsets the O_NONBLOCK flag on a given file descriptor +(which makes reading or writing non-blocking or blocking), then executes +a program. +</p> + +<h2> Interface </h2> + +<pre> + fdblock [ -n ] <em>fd</em> <em>prog...</em> +</pre> + +<p> +<tt>fdblock</tt> makes the file descriptor number <em>fd</em> blocking, +no matter what its previous state was. It then execs into <em>prog</em> +with its arguments. +</p> + +<h2> Options </h2> + +<ul> + <li> <tt>-n</tt> : non-blocking. Sets <em>fd</em> to non-blocking +mode instead of blocking mode. If used on stdin (0) or stdout (1), this +option will make a lot of command-line programs behave improperly, because +most simple command-line programs only support blocking stdin and stdout. +Make sure you know what you are doing. </li> +</ul> + +<h2> Notes </h2> + +<ul> + <li> <tt>fdblock</tt> has no portable shell equivalent. </li> +</ul> + +</body> +</html> |