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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <grp.h>
#include <pwd.h>
#include <limits.h>
#include <sys/types.h>
static void
DEFUN(print_grpname, (id, parens),
gid_t id AND int parens)
{
CONST struct group *CONST g = getgrgid(id);
if (g == NULL)
{
if (parens)
return;
else
{
fprintf(stderr, "Couldn't find name for group %d\n", id);
exit(EXIT_FAILURE);
}
}
if (parens)
printf("(%s)", g->gr_name);
else
puts(g->gr_name);
}
static void
DEFUN(print_pwdname, (id, parens),
uid_t id AND int parens)
{
CONST struct passwd *CONST p = getpwuid(id);
if (p == NULL)
{
if (parens)
return;
else
{
fprintf(stderr, "Couldn't find name for user %d\n", (int) id);
exit(EXIT_FAILURE);
}
}
if (parens)
printf("(%s)", p->pw_name);
else
puts(p->pw_name);
}
int
DEFUN(main, (argc, argv), int argc AND char **argv)
{
int print_gid = 1, print_uid = 1;
int real = 0, name = 0;
int error = 0;
register int c;
uid_t ruid = getuid(), euid = geteuid();
gid_t rgid = getgid(), egid = getegid();
while ((c = getopt(argc, argv, "gurn")) != -1)
switch (c)
{
default:
error = 1;
break;
case 'g':
print_gid = 1;
print_uid = 0;
break;
case 'u':
print_uid = 1;
print_gid = 0;
break;
case 'r':
real = 1;
break;
case 'n':
name = 1;
break;
}
if (error || argc != optind)
{
fputs("Usage: id [-gurn]\n", stderr);
exit(EXIT_FAILURE);
}
if (print_uid && !print_gid)
{
CONST uid_t uid = real ? ruid : euid;
if (name)
print_pwdname(uid, 0);
else
printf("%d\n", (int) uid);
}
else if (print_gid && !print_uid)
{
CONST gid_t gid = real ? rgid : egid;
if (name)
print_grpname(gid, 0);
else
printf("%d\n", (int) gid);
}
else
{
#if NGROUPS_MAX > 0
gid_t groups[NGROUPS_MAX];
int ngroups;
ngroups = getgroups(NGROUPS_MAX, groups);
#endif
printf("uid=%d", (int) ruid);
print_pwdname(ruid, 1);
printf(" gid=%d", (int) rgid);
print_grpname(rgid, 1);
if (euid != ruid)
{
printf(" euid=%d", (int) euid);
print_pwdname(euid, 1);
}
if (egid != rgid)
{
printf(" egid=%d", (int) egid);
print_grpname(egid, 1);
}
#if NGROUPS > 0
if (ngroups > 0)
{
register size_t i;
printf(" groups=%d", (int) groups[0]);
print_grpname(groups[0], 1);
for (i = 1; i < ngroups; ++i)
{
printf(", %d", (int) groups[i]);
print_grpname(groups[i], 1);
}
}
#endif
putchar('\n');
}
exit(EXIT_SUCCESS);
}
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