c7302b61ef
Files with no license use the default 3-clauses BSD license. The copyright were mostly not recorded; they were updated according to the Changelog. "Julianne Frances Haugh and contributors" changed to "copyright holders and contributors".
197 lines
4.9 KiB
C
197 lines
4.9 KiB
C
/*
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* Copyright (c) 1991 - 1993, Julianne Frances Haugh
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* Copyright (c) 1996 - 2000, Marek Michałkiewicz
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* Copyright (c) 2001 - 2006, Tomasz Kłoczko
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* Copyright (c) 2007 - 2008, Nicolas François
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#ident "$Id$"
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include "defines.h"
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#include "prototypes.h"
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/*
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* Global variables
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*/
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static char *Prog;
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/* local function prototypes */
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static void print_groups (const char *);
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/*
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* print_groups - print the groups which the named user is a member of
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*
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* print_groups() scans the groups file for the list of groups which
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* the user is listed as being a member of.
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*/
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static void print_groups (const char *member)
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{
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int groups = 0;
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struct group *grp;
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struct passwd *pwd;
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int flag = 0;
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/* local, no need for xgetpwnam */
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if ((pwd = getpwnam (member)) == 0) {
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fprintf (stderr, _("%s: unknown user %s\n"), Prog, member);
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exit (1);
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}
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setgrent ();
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while ((grp = getgrent ())) {
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if (is_on_list (grp->gr_mem, member)) {
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if (groups++)
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putchar (' ');
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printf ("%s", grp->gr_name);
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if (grp->gr_gid == pwd->pw_gid)
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flag = 1;
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}
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}
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endgrent ();
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/* local, no need for xgetgrgid */
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if (!flag && (grp = getgrgid (pwd->pw_gid))) {
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if (groups++)
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putchar (' ');
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printf ("%s", grp->gr_name);
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}
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if (groups)
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putchar ('\n');
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}
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/*
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* groups - print out the groups a process is a member of
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*/
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int main (int argc, char **argv)
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{
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long sys_ngroups;
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#ifdef HAVE_GETGROUPS
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int ngroups;
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GETGROUPS_T *groups;
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int pri_grp;
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int i;
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#else
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char *logname;
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char *getlogin ();
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#endif
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sys_ngroups = sysconf (_SC_NGROUPS_MAX);
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#ifdef HAVE_GETGROUPS
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groups = (GETGROUPS_T *) malloc (sys_ngroups * sizeof (GETGROUPS_T));
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#endif
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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/*
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* Get the program name so that error messages can use it.
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*/
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Prog = Basename (argv[0]);
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if (argc == 1) {
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/*
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* Called with no arguments - give the group set for the
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* current user.
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*/
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#ifdef HAVE_GETGROUPS
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/*
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* This system supports concurrent group sets, so I can ask
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* the system to tell me which groups are currently set for
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* this process.
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*/
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ngroups = getgroups (sys_ngroups, groups);
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if (ngroups < 0) {
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perror ("getgroups");
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exit (1);
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}
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/*
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* The groupset includes the primary group as well.
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*/
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pri_grp = getegid ();
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for (i = 0; i < ngroups; i++)
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if (pri_grp == (int) groups[i])
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break;
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if (i != ngroups)
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pri_grp = -1;
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/*
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* Print out the name of every group in the current group
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* set. Unknown groups are printed as their decimal group ID
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* values.
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*/
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if (pri_grp != -1) {
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struct group *gr;
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/* local, no need for xgetgrgid */
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if ((gr = getgrgid (pri_grp)))
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printf ("%s", gr->gr_name);
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else
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printf ("%d", pri_grp);
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}
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for (i = 0; i < ngroups; i++) {
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struct group *gr;
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if (i || pri_grp != -1)
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putchar (' ');
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/* local, no need for xgetgrgid */
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if ((gr = getgrgid (groups[i])))
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printf ("%s", gr->gr_name);
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else
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printf ("%ld", (long) groups[i]);
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}
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putchar ('\n');
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#else
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/*
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* This system does not have the getgroups() system call, so
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* I must check the groups file directly.
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*/
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if ((logname = getlogin ()))
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print_groups (logname);
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else
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exit (1);
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#endif
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} else {
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/*
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* The invoker wanted to know about some other user. Use
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* that name to look up the groups instead.
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*/
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print_groups (argv[1]);
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}
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exit (0);
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}
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