/* * * Copyright (c) International Business Machines Corp., 2001 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* * DESCRIPTION * Testcase to check open(2) sets errno to EACCES correctly. * * ALGORITHM * Create a file owned by root with no read permission for other users. * Attempt to open it as ltpuser(1). The attempt should fail with EACCES. * RESTRICTION * Must run test as root. */ #include #include #include #include #include #include #include "test.h" #include "safe_macros.h" char *TCID = "open05"; int TST_TOTAL = 1; static char fname[20]; static int fd; static uid_t nobody_uid; static void cleanup(void); static void setup(void); int main(int ac, char **av) { int lc; int e_code, status, retval = 0; pid_t pid; tst_parse_opts(ac, av, NULL, NULL); setup(); for (lc = 0; TEST_LOOPING(lc); lc++) { /* reset tst_count in case we are looping */ tst_count = 0; pid = FORK_OR_VFORK(); if (pid == -1) tst_brkm(TBROK, cleanup, "fork() failed"); if (pid == 0) { if (seteuid(nobody_uid) == -1) { tst_resm(TWARN, "seteuid() failed, errno: %d", errno); } TEST(open(fname, O_RDWR)); if (TEST_RETURN != -1) { tst_resm(TFAIL, "open succeeded unexpectedly"); continue; } if (TEST_ERRNO != EACCES) { retval = 1; tst_resm(TFAIL, "Expected EACCES got %d", TEST_ERRNO); } else { tst_resm(TPASS, "open returned expected " "EACCES error"); } /* set the id back to root */ if (seteuid(0) == -1) tst_resm(TWARN, "seteuid(0) failed"); exit(retval); } else { /* wait for the child to finish */ wait(&status); /* make sure the child returned a good exit status */ e_code = status >> 8; if ((e_code != 0) || (retval != 0)) tst_resm(TFAIL, "Failures reported above"); close(fd); cleanup(); } } tst_exit(); } static void setup(void) { struct passwd *pw; tst_require_root(); pw = SAFE_GETPWNAM(NULL, "nobody"); nobody_uid = pw->pw_uid; tst_sig(FORK, DEF_HANDLER, cleanup); TEST_PAUSE; /* make a temporary directory and cd to it */ tst_tmpdir(); sprintf(fname, "file.%d", getpid()); fd = SAFE_OPEN(cleanup, fname, O_RDWR | O_CREAT, 0700); } static void cleanup(void) { unlink(fname); /* delete the test directory created in setup() */ tst_rmdir(); }