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      1 /*
      2  * Copyright (c) International Business Machines  Corp., 2001
      3  *  07/2001 Ported by John George
      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 would 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 the Free Software Foundation,
     17  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
     18  */
     19 
     20 /*
     21  * umask(2) sets the mask from 0000 to 0777 while we create files,
     22  * the previous value of the mask should be returned correctly,
     23  * and the file mode should be correct for each creation mask.
     24  */
     25 
     26 #include <errno.h>
     27 #include <stdio.h>
     28 #include <sys/types.h>
     29 #include <sys/stat.h>
     30 #include "tst_test.h"
     31 
     32 static void verify_umask(void)
     33 {
     34 	struct stat statbuf;
     35 	int mskval;
     36 	int fd;
     37 	int failflag = 0;
     38 	unsigned low9mode;
     39 
     40 	for (mskval = 0000; mskval < 01000; mskval++) {
     41 		TEST(umask(mskval));
     42 		if (TST_RET < 0 || TST_RET > 0777) {
     43 			tst_brk(TFAIL, "umask(%o) result outside range %ld",
     44 				mskval, TST_RET);
     45 		}
     46 
     47 		if (mskval > 0000 && TST_RET != mskval - 1) {
     48 			failflag = 1;
     49 			tst_res(TFAIL, "umask(%o) returned %ld, expected %d",
     50 				mskval, TST_RET, mskval - 1);
     51 		}
     52 
     53 		fd = SAFE_CREAT("testfile", 0777);
     54 		SAFE_CLOSE(fd);
     55 
     56 		SAFE_STAT("testfile", &statbuf);
     57 
     58 		low9mode = statbuf.st_mode & 0777;
     59 
     60 		if (low9mode != (~mskval & 0777)) {
     61 			failflag = 1;
     62 			tst_res(TFAIL, "File mode got %o, expected %o",
     63 				low9mode, ~mskval & 0777);
     64 		}
     65 
     66 		SAFE_UNLINK("testfile");
     67 	}
     68 
     69 	if (!failflag)
     70 		tst_res(TPASS, "All files created with correct mode");
     71 }
     72 
     73 static struct tst_test test = {
     74 	.test_all = verify_umask,
     75 	.needs_tmpdir = 1,
     76 };
     77