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      1 /* $NetBSD: h_fileactions.c,v 1.2 2021/11/07 15:46:20 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles Zhang <charles (at) NetBSD.org> and
      9  * Martin Husemann <martin (at) NetBSD.org>.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 #include <sys/cdefs.h>
     33 __RCSID("$NetBSD: h_fileactions.c,v 1.2 2021/11/07 15:46:20 christos Exp $");
     34 
     35 #include <stdio.h>
     36 #include <stdlib.h>
     37 #include <string.h>
     38 #include <unistd.h>
     39 #include <errno.h>
     40 #include <sys/stat.h>
     41 
     42 #define BUFSIZE	16
     43 
     44 /*
     45  * This checks (hardcoded) the assumptions that are setup from the
     46  * main test program via posix spawn file actions.
     47  * Program exits with EXIT_SUCCESS or EXIT_FAILURE accordingly
     48  * (and does some stderr diagnostics in case of errors).
     49  */
     50 int
     51 main(int argc, char **argv)
     52 {
     53 	int res = EXIT_SUCCESS;
     54 	char buf[BUFSIZE];
     55 	struct stat sb0, sb1;
     56 
     57 	strcpy(buf, "test...");
     58 	/* file desc 3 should be closed via addclose */
     59 	if (read(3, buf, BUFSIZE) != -1 || errno != EBADF) {
     60 		fprintf(stderr, "%s: filedesc 3 is not closed\n",
     61 		    getprogname());
     62 		res = EXIT_FAILURE;
     63 	}
     64 	/* file desc 4 should be closed via closeonexec */
     65 	if (read(4, buf, BUFSIZE) != -1 || errno != EBADF) {
     66 		fprintf(stderr, "%s: filedesc 4 is not closed\n",
     67 		    getprogname());
     68 		res = EXIT_FAILURE;
     69 	}
     70 	/* file desc 5 remains open */
     71 	if (write(5, buf, BUFSIZE) <= 0) {
     72 		fprintf(stderr, "%s: could not write to filedesc 5\n",
     73 		    getprogname());
     74 		res = EXIT_FAILURE;
     75 	}
     76 	/* file desc 6 should be open (via addopen) */
     77 	if (write(6, buf, BUFSIZE) <= 0) {
     78 		fprintf(stderr, "%s: could not write to filedesc 6\n",
     79 		    getprogname());
     80 		res = EXIT_FAILURE;
     81 	}
     82 	/* file desc 7 should refer to stdout */
     83 	fflush(stdout);
     84 	if (fstat(fileno(stdout), &sb0) != 0) {
     85 		fprintf(stderr, "%s: could not fstat stdout\n",
     86 		    getprogname());
     87 		res = EXIT_FAILURE;
     88 	}
     89 	if (fstat(7, &sb1) != 0) {
     90 		fprintf(stderr, "%s: could not fstat filedesc 7\n",
     91 		    getprogname());
     92 		res = EXIT_FAILURE;
     93 	}
     94 	if (write(7, buf, strlen(buf)) <= 0) {
     95 		fprintf(stderr, "%s: could not write to filedesc 7\n",
     96 		    getprogname());
     97 		res = EXIT_FAILURE;
     98 	}
     99 	if (memcmp(&sb0, &sb1, sizeof sb0) != 0) {
    100 		fprintf(stderr, "%s: stat results differ\n", getprogname());
    101 		res = EXIT_FAILURE;
    102 	}
    103 
    104 	return res;
    105 }
    106 
    107