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      1 /*
      2  * Copyright (c) International Business Machines  Corp., 2001
      3  * Copyright (c) 2015 Cyril Hrubis <chrubis (at) suse.cz>
      4  *
      5  *  07/2001 Ported by Wayne Boyer
      6  *  04/2008 Roy Lee <roylee (at) andestech.com>
      7  *
      8  * This program is free software;  you can redistribute it and/or modify
      9  * it under the terms of the GNU General Public License as published by
     10  * the Free Software Foundation; either version 2 of the License, or
     11  * (at your option) any later version.
     12  *
     13  * This program is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY;  without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
     16  * the GNU General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU General Public License
     19  * along with this program;  if not, write to the Free Software Foundation,
     20  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     21  */
     22 
     23 /*
     24  * Attempt to execve(2) a file which is being opened by another process for
     25  * writing fails with ETXTBSY.
     26  */
     27 
     28 #ifndef _GNU_SOURCE
     29 #define _GNU_SOURCE
     30 #endif
     31 #include <sys/types.h>
     32 #include <sys/wait.h>
     33 #include <errno.h>
     34 #include <fcntl.h>
     35 #include <libgen.h>
     36 #include <stdio.h>
     37 
     38 #include "test.h"
     39 #include "safe_macros.h"
     40 
     41 #define TEST_APP "execve_child"
     42 
     43 char *TCID = "execve04";
     44 int TST_TOTAL = 1;
     45 
     46 static void setup(void);
     47 static void cleanup(void);
     48 static void do_child(void);
     49 
     50 int main(int ac, char **av)
     51 {
     52 	int lc;
     53 	pid_t pid;
     54 	char *argv[2] = {TEST_APP, NULL};
     55 	char *env[1] = {NULL};
     56 
     57 	tst_parse_opts(ac, av, NULL, NULL);
     58 
     59 #ifdef UCLINUX
     60 	maybe_run_child(&do_child, "");
     61 #endif
     62 
     63 	setup();
     64 
     65 	for (lc = 0; TEST_LOOPING(lc); lc++) {
     66 		if ((pid = FORK_OR_VFORK()) == -1) {
     67 			tst_brkm(TBROK, cleanup, "fork failed");
     68 		} else if (pid == 0) {
     69 #ifdef UCLINUX
     70 			if (self_exec(av[0], "") < 0)
     71 				tst_brkm(TBROK, cleanup, "self_exec failed");
     72 #else
     73 			do_child();
     74 #endif
     75 		}
     76 
     77 		TST_SAFE_CHECKPOINT_WAIT(cleanup, 0);
     78 
     79 		TEST(execve(TEST_APP, argv, env));
     80 
     81 		if (TEST_ERRNO != ETXTBSY)
     82 			tst_resm(TFAIL | TTERRNO, "execve succeeded, expected failure");
     83 		else
     84 			tst_resm(TPASS | TTERRNO, "execve failed as expected");
     85 
     86 		TST_SAFE_CHECKPOINT_WAKE(cleanup, 0);
     87 		SAFE_WAIT(cleanup, NULL);
     88 	}
     89 
     90 	cleanup();
     91 	tst_exit();
     92 }
     93 
     94 void setup(void)
     95 {
     96 	char path[PATH_MAX];
     97 
     98 	if (tst_get_path(TEST_APP, path, sizeof(path))) {
     99 		tst_brkm(TBROK, NULL,
    100 		         "Couldn't found "TEST_APP" binary in $PATH");
    101 	}
    102 
    103 	tst_tmpdir();
    104 
    105 	TST_CHECKPOINT_INIT(tst_rmdir);
    106 
    107 	SAFE_CP(tst_rmdir, path, ".");
    108 }
    109 
    110 static void cleanup(void)
    111 {
    112 	tst_rmdir();
    113 }
    114 
    115 static void do_child(void)
    116 {
    117 	int fd;
    118 
    119 #ifdef UCLINUX
    120 	TST_CHECKPOINT_INIT(NULL);
    121 #endif
    122 
    123 	if ((fd = open(TEST_APP, O_WRONLY)) == -1) {
    124 		perror("open failed");
    125 		exit(1);
    126 	}
    127 
    128 	TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(NULL, 0);
    129 
    130 	exit(0);
    131 }
    132