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      1 /*
      2  *
      3  *   Copyright (c) International Business Machines  Corp., 2001
      4  *
      5  *   This program is free software;  you can redistribute it and/or modify
      6  *   it under the terms of the GNU General Public License as published by
      7  *   the Free Software Foundation; either version 2 of the License, or
      8  *   (at your option) any later version.
      9  *
     10  *   This program is distributed in the hope that it will be useful,
     11  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
     12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
     13  *   the GNU General Public License for more details.
     14  *
     15  *   You should have received a copy of the GNU General Public License
     16  *   along with this program;  if not, write to the Free Software
     17  *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     18  */
     19 
     20 /*
     21  * Test Name: getresgid01
     22  *
     23  * Test Description:
     24  *  Verify that getresgid() will be successful to get the real, effective
     25  *  and saved user id of the calling process.
     26  *
     27  * Expected Result:
     28  *  getresgid() should return with 0 value and the real/effective/saved
     29  *  user ids should be equal to that of calling process.
     30  *
     31  * Algorithm:
     32  *  Setup:
     33  *   Setup signal handling.
     34  *   Pause for SIGUSR1 if option specified.
     35  *
     36  *  Test:
     37  *   Loop if the proper options are given.
     38  *   Execute system call
     39  *   Check return code, if system call failed (return=-1)
     40  *	Log the errno and Issue a FAIL message.
     41  *   Otherwise,
     42  *	Verify the Functionality of system call
     43  *      if successful,
     44  *		Issue Functionality-Pass message.
     45  *      Otherwise,
     46  *		Issue Functionality-Fail message.
     47  *  Cleanup:
     48  *   Print errno log and/or timing stats if options given
     49  *
     50  * Usage:  <for command-line>
     51  *  getresgid01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
     52  *     where,  -c n : Run n copies concurrently.
     53  *             -f   : Turn off functionality Testing.
     54  *	       -i n : Execute test n times.
     55  *	       -I x : Execute test for x seconds.
     56  *	       -P x : Pause for x seconds between iterations.
     57  *	       -t   : Turn on syscall timing.
     58  *
     59  * HISTORY
     60  *	07/2001 Ported by Wayne Boyer
     61  *
     62  * RESTRICTIONS:
     63  *  None.
     64  *
     65  */
     66 
     67 #include <stdio.h>
     68 #include <unistd.h>
     69 #include <sys/types.h>
     70 #include <errno.h>
     71 #include <fcntl.h>
     72 #include <string.h>
     73 #include <signal.h>
     74 
     75 #include "test.h"
     76 
     77 extern int getresgid(gid_t *, gid_t *, gid_t *);
     78 
     79 char *TCID = "getresgid01";
     80 int TST_TOTAL = 1;
     81 gid_t pr_gid, pe_gid, ps_gid;	/* calling process real/effective/saved gid */
     82 
     83 void setup();			/* Main setup function of test */
     84 void cleanup();			/* cleanup function for the test */
     85 
     86 int main(int ac, char **av)
     87 {
     88 	int lc;
     89 	gid_t real_gid,		/* real/eff./saved user id from getresgid() */
     90 	 eff_gid, sav_gid;
     91 
     92 	tst_parse_opts(ac, av, NULL, NULL);
     93 
     94 	setup();
     95 
     96 	for (lc = 0; TEST_LOOPING(lc); lc++) {
     97 
     98 		tst_count = 0;
     99 
    100 		/*
    101 		 * Call getresgid() to get the real/effective/saved
    102 		 * user id's of the calling process.
    103 		 */
    104 		TEST(getresgid(&real_gid, &eff_gid, &sav_gid));
    105 
    106 		if (TEST_RETURN == -1) {
    107 			tst_resm(TFAIL, "getresgid() Failed, errno=%d : %s",
    108 				 TEST_ERRNO, strerror(TEST_ERRNO));
    109 			continue;
    110 		}
    111 		/*
    112 		 * Verify the real/effective/saved gid values returned
    113 		 * by getresgid with the expected values.
    114 		 */
    115 		if ((real_gid != pr_gid) || (eff_gid != pe_gid) ||
    116 		    (sav_gid != ps_gid)) {
    117 			tst_resm(TFAIL, "real:%d, effective:%d, "
    118 				 "saved-user:%d ids differ",
    119 				 real_gid, eff_gid, sav_gid);
    120 		} else {
    121 			tst_resm(TPASS, "Functionality of getresgid() "
    122 				 "successful");
    123 		}
    124 	}
    125 
    126 	cleanup();
    127 	tst_exit();
    128 }
    129 
    130 /*
    131  * setup() - performs all ONE TIME setup for this test.
    132  *	     Get the real/effective/saved user id of the calling process.
    133  */
    134 void setup(void)
    135 {
    136 
    137 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
    138 
    139 	TEST_PAUSE;
    140 
    141 	/* Real user-id of the calling process */
    142 	pr_gid = getgid();
    143 
    144 	/* Effective user-id of the calling process */
    145 	pe_gid = getegid();
    146 
    147 	/* Saved user-id of the calling process */
    148 	ps_gid = getegid();
    149 
    150 }
    151 
    152 /*
    153  * cleanup() - performs all ONE TIME cleanup for this test at
    154  *             completion or premature exit.
    155  */
    156 void cleanup(void)
    157 {
    158 
    159 }
    160