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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2018-06-26 00:25:28 +0000 |
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| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2018-06-26 00:25:28 +0000 |
| commit | 633445be1a9be37ae727c044417f5607706cf4ae (patch) | |
| tree | 3c037459f5249e5c18ee5b9e41802c5964364f95 /doc/libnsss/index.html | |
| download | nsss-633445be1a9be37ae727c044417f5607706cf4ae.tar.xz | |
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diff --git a/doc/libnsss/index.html b/doc/libnsss/index.html new file mode 100644 index 0000000..0307725 --- /dev/null +++ b/doc/libnsss/index.html @@ -0,0 +1,97 @@ +<html> + <head> + <meta name="viewport" content="width=device-width, initial-scale=1.0" /> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> + <meta http-equiv="Content-Language" content="en" /> + <title>nsss: the nsss library interface</title> + <meta name="Description" content="nsss: the nsss library interface" /> + <meta name="Keywords" content="NSS pwd group shadow library libnsss skarnet" /> + <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> --> + </head> +<body> + +<p> +<a href="../">nsss</a><br /> +<a href="//skarnet.org/software/">Software</a><br /> +<a href="//skarnet.org/">skarnet.org</a> +</p> + +<h1> The <tt>nsss</tt> library interface </h1> + +<h2> General information </h2> + +<p> + <tt>libnsss</tt> is a client library meant to be used by client +programs needing utmp functionality. It interacts with various +server-side daemons such as +<a href="../nsssd-unix.html">nsssd-unix</a>. +</p> + +<p> + Application programs can use it directly, but most existing programs +simply use the standard +<a href="http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/pwd.h.html">pwd.h</a>, +<a href="http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/grp.h.html">grp.h</a> or +<a href="http://man7.org/linux/man-pages/man3/getspnam.3.html">shadow.h</a> +interfaces, which in nsss are implemented as a series of thin wrappers +around the nsss library. +</p> + +<h2> Compiling </h2> + +<ul> + <li> Make sure the nsss headers, as well as the skalibs headers, +are visible in your header search path. </li> + <li> Use <tt>#include <nsss/nsss.h></tt> </li> + <li> To use the standard <tt>pwd.h</tt> interface, you can +just <tt>#include <pwd.h></tt>, which will work as long +as the <tt>nsss/pwd.h</tt> header is accessible in your header +search path. </li> + <li> Same thing for <tt>grp.h</tt> and <tt>shadow.h</tt>. </li> +</ul> + +<h2> Linking </h2> + +<ul> + <li> Make sure the nsss library, as well as the skalibs library, +are visible in your library search path. </li> + <li> Link against <tt>-lnsss</tt>, <tt>-lskarnet</tt>, </li> +<tt>`cat $SYSDEPS/socket.lib`</tt> and +<tt>`cat $SYSDEPS/tainnow.lib`</tt>, $SYSDEPS being your skalibs +sysdeps directory. </li> +</ul> + +<h2> Programming </h2> + +<p> + The <tt>nsss/nsss.h</tt> header is actually a collection of headers: +</p> + +<ul> + <li> <tt>nsss/nsss-unix.h</tt> implements basic access to the +<tt>/etc/passwd</tt>, <tt>/etc/group</tt> and <tt>/etc/shadow</tt> +database. </li> + <li> <tt>nsss/nsss-switch.h</tt> implements connection via a Unix +domain socket to a listening <tt>nsssd</tt> daemon, implementing an +authentication backend based on what implementation of +the daemon is listening. </li> + <li> <tt>nsss/nsss-all.h</tt> implements a safe policy: first a +connection via <tt>nsss-switch</tt> is attempted, and if no daemon +is listening, the safe <tt>nsss-unix</tt> backend is used. </li> +</ul> + +<p> + By default, the <tt>getpwnam()</tt> et al. functions are aliased +to their <tt>nsss-all</tt> implementations. You can disable the +<tt>nsss-unix</tt> fallback by compiling with the NSSS_DISABLE_UNIX +macro defined (-DNSSS_DISABLE_UNIX). Or you can disable any +attempt to connect to a daemon by compiling with the +NSSS_DISABLE_SWITCH macro defined (-DNSSS_DISABLE_SWITCH). +</p> + +<p> + (To be completed.) +</p> + +</body> +</html> |