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authorTobias Klauser <tklauser@distanz.ch>2008-01-27 11:37:44 +0100
committerTobias Klauser <tklauser@xenon.tklauser.home>2008-01-27 11:37:44 +0100
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+<TITLE>getgroups</TITLE>
+<body bgcolor="#ffffcc">
+<hr>
+<pre>
+
+
+
+<h3>GETGROUPS(2) Linux Programmer's Manual GETGROUPS(2)
+</h3>
+
+<h3>NAME
+</h3> getgroups, setgroups - get/set group access list
+
+<h3>SYNOPSIS
+</h3> #include &lt;unistd.h&gt;
+
+ int getgroups(int size, gid_t list[]);
+
+
+ #define __USE_BSD
+ #include &lt;grp.h&gt;
+
+ int setgroups(size_t size, const gid_t *list);
+
+<h3>DESCRIPTION
+</h3> getgroups
+ Up to size supplemental groups are returned in
+ list. If size is zero, list is not modified, but
+ the total number of supplemental groups for the
+ process is returned.
+
+ setgroups
+ Sets the supplemental groups for the process. Only
+ the super-user may use this function.
+
+<h3>RETURN VALUE
+</h3> getgroups
+ On success, the number of groups stored in list is
+ returned (if size is zero, however, the number of
+ supplemental group IDs associated with the process
+ is returned). On error, -1 is returned, and errno
+ is set appropriately.
+
+ setgroups
+ On success, zero is returned. On error, -1 is
+ returned, and errno is set appropriately.
+
+<h3>ERRORS
+</h3> EFAULT list has an invalid address.
+
+ EPERM For setgroups, the user is not the super-user.
+
+ EINVAL For setgroups, gidsetsize is greater than NGROUPS
+ (32 for Linux 0.99.11).
+
+<h3>CONFORMING TO
+</h3> getgroups conforms to POSIX.1 (and is present in BSD 4.3).
+ Since setgroups requires privilege, it is not covered
+ under POSIX.1.
+
+<h3>BUGS
+</h3> The __USE_BSD flag probably shouldn't be required for set-
+ groups.
+
+
+
+
+<h3>Linux 0.99.11 23 July 1993 1
+</h3>
+
+
+
+
+<h3>GETGROUPS(2) Linux Programmer's Manual GETGROUPS(2)
+</h3>
+
+</pre>
+<hr>
+<h3>SEE ALSO
+</h3><p>
+<a href=initgroups.htm>initgroups</a>,
+<pre>
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+<h3>Linux 0.99.11 23 July 1993 2
+</h3>
+
+ </pre>
+<P>
+<hr>
+<p>
+<center>
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+
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