[svn-upgrade] Integrating new upstream version, shadow (19990709)
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nekral-guest
188
src/id.c
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188
src/id.c
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/*
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* Copyright 1991 - 1994, Julianne Frances Haugh
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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. Neither the name of Julianne F. Haugh nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* id - print current process user identification information
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*
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* Print the current process identifiers. This includes the
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* UID, GID, effective-UID and effective-GID. Optionally print
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* the concurrent group set if the current system supports it.
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*/
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#include <config.h>
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#include "rcsid.h"
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RCSID(PKG_VER "$Id: id.c,v 1.5 1999/06/07 16:40:45 marekm Exp $")
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#include <sys/types.h>
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#include <stdio.h>
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#include <grp.h>
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#include <pwd.h>
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#include "defines.h"
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/* local function prototypes */
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static void usage P_((void));
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int main P_((int, char **));
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static void
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usage(void)
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{
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#ifdef HAVE_GETGROUPS
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fprintf(stderr, _("usage: id [ -a ]\n"));
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#else
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fprintf(stderr, _("usage: id\n"));
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#endif
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exit(1);
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}
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/*ARGSUSED*/
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int
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main(int argc, char **argv)
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{
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uid_t ruid, euid;
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gid_t rgid, egid;
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int i;
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/*
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* This block of declarations is particularly strained because of several
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* different ways of doing concurrent groups. Old BSD systems used int
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* for gid's, but short for the type passed to getgroups(). Newer systems
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* use gid_t for everything. Some systems have a small and fixed NGROUPS,
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* usually about 16 or 32. Others use bigger values.
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*/
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#ifdef HAVE_GETGROUPS
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GETGROUPS_T groups[NGROUPS_MAX];
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int ngroups;
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int aflg = 0;
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#endif
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struct passwd *pw;
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struct group *gr;
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setlocale(LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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#ifdef HAVE_GETGROUPS
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/*
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* See if the -a flag has been given to print out the
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* concurrent group set.
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*/
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if (argc > 1) {
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if (argc > 2 || strcmp (argv[1], "-a"))
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usage();
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else
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aflg = 1;
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}
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#else
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if (argc > 1)
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usage();
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#endif
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ruid = getuid();
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euid = geteuid();
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rgid = getgid();
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egid = getegid();
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/*
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* Print out the real user ID and group ID. If the user or
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* group does not exist, just give the numerical value.
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*/
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pw = getpwuid(ruid);
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if (pw)
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printf(_("uid=%d(%s)"), (int) ruid, pw->pw_name);
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else
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printf(_("uid=%d"), (int) ruid);
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gr = getgrgid(rgid);
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if (gr)
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printf(_(" gid=%d(%s)"), (int) rgid, gr->gr_name);
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else
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printf(_(" gid=%d"), (int) rgid);
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/*
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* Print out the effective user ID and group ID if they are
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* different from the real values.
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*/
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if (ruid != euid) {
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pw = getpwuid(euid);
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if (pw)
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printf(_(" euid=%d(%s)"), (int) euid, pw->pw_name);
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else
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printf(_(" euid=%d"), (int) euid);
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}
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if (rgid != egid) {
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gr = getgrgid(egid);
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if (gr)
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printf(_(" egid=%d(%s)"), (int) egid, gr->gr_name);
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else
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printf(_(" egid=%d"), (int) egid);
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}
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#ifdef HAVE_GETGROUPS
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/*
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* Print out the concurrent group set if the user has requested
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* it. The group numbers will be printed followed by their
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* names.
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*/
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if (aflg && (ngroups = getgroups (NGROUPS_MAX, groups)) != -1) {
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/*
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* Start off the group message. It will be of the format
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*
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* groups=###(aaa),###(aaa),###(aaa)
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*
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* where "###" is a numerical value and "aaa" is the
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* corresponding name for each respective numerical value.
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*/
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printf(_(" groups="));
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for (i = 0; i < ngroups; i++) {
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if (i)
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putchar(',');
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gr = getgrgid(groups[i]);
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if (gr)
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printf("%d(%s)", (int) groups[i], gr->gr_name);
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else
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printf("%d", (int) groups[i]);
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}
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}
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#endif
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/*
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* Finish off the line.
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*/
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putchar('\n');
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exit(0);
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/*NOTREACHED*/
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}
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