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Diffstat (limited to 'lib/libc/gen/getgrouplist.3')
-rw-r--r-- | lib/libc/gen/getgrouplist.3 | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/lib/libc/gen/getgrouplist.3 b/lib/libc/gen/getgrouplist.3 new file mode 100644 index 0000000..7878574 --- /dev/null +++ b/lib/libc/gen/getgrouplist.3 @@ -0,0 +1,92 @@ +.\" Copyright (c) 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)getgrouplist.3 8.1 (Berkeley) 6/9/93 +.\" +.Dd June 9, 1993 +.Dt GETGROUPLIST 3 +.Os +.Sh NAME +.Nm getgrouplist +.Nd calculate group access list +.Sh SYNOPSIS +.Fd #include <unistd.h> +.Ft int +.Fn getgrouplist "const char *name" "int basegid" "int *groups" "int *ngroups" +.Sh DESCRIPTION +The +.Fn getgrouplist +function reads through the group file and calculates +the group access list for the user specified in +.Fa name . +The +.Fa basegid +is automatically included in the groups list. +Typically this value is given as +the group number from the password file. +.Pp +The resulting group list is returned in the integer array pointed to by +.Fa groups . +The caller specifies the size of the +.Fa groups +array in the integer pointed to by +.Fa ngroups ; +the actual number of groups found is returned in +.Fa ngroups . +.Sh RETURN VALUES +The +.Fn getgrouplist +function +returns \-1 if the size of the group list is too small to +hold all the user's groups. +Here, the group array will be filled with as many groups as will fit. +.Sh FILES +.Bl -tag -width /etc/group -compact +.It Pa /etc/group +group membership list +.El +.Sh SEE ALSO +.Xr setgroups 2 , +.Xr initgroups 3 +.Sh HISTORY +The +.Fn getgrouplist +function first appeared in 4.4BSD. +.Sh BUGS +The +.Fn getgrouplist +function +uses the routines based on +.Xr getgrent 3 . +If the invoking program uses any of these routines, +the group structure will +be overwritten in the call to +.Fn getgrouplist . |