1 /* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12 /* 13 * Copyright 2020 Robert Mustacchi 14 */ 15 16 /* 17 * In a c99/xpg6 environment freopen(3C) allows you to specify a NULL path to 18 * try and change the fopen() flags. Verify that the memstream functions do not 19 * allow this. Note, freopen(3C) is defined to try and close the stream, hence 20 * you won't see anything here. 21 */ 22 23 #include <stdio.h> 24 #include <stdio.h> 25 #include <wchar.h> 26 #include <err.h> 27 #include <stdlib.h> 28 #include <errno.h> 29 30 const char * 31 _umem_debug_init(void) 32 { 33 return ("default,verbose"); 34 } 35 36 const char * 37 _umem_logging_init(void) 38 { 39 return ("fail,contents"); 40 } 41 42 static void 43 check_reopen(FILE *f, const char *variant) 44 { 45 FILE *new = freopen(NULL, "r", f); 46 if (new != NULL) { 47 errx(EXIT_FAILURE, "TEST FAILED: was able to freopen %s", 48 variant); 49 } 50 51 if (errno != EBADF) { 52 errx(EXIT_FAILURE, "TEST FAILED: found wrong errno for %s: " 53 "expected %d, found %d", variant, EBADF, errno); 54 } 55 56 (void) printf("TEST PASSED: %s\n", variant); 57 } 58 59 int 60 main(void) 61 { 62 FILE *f; 63 char *c; 64 wchar_t *wc; 65 size_t sz; 66 67 f = fmemopen(NULL, 16, "a+"); 68 if (f == NULL) { 69 err(EXIT_FAILURE, "failed to create fmemopen() stream"); 70 } 71 check_reopen(f, "fmemopen()"); 72 73 f = open_memstream(&c, &sz); 74 if (f == NULL) { 75 err(EXIT_FAILURE, "failed to create open_memstream() stream"); 76 } 77 check_reopen(f, "open_memstream()"); 78 free(c); 79 80 f = open_wmemstream(&wc, &sz); 81 if (f == NULL) { 82 err(EXIT_FAILURE, "failed to create open_wmemstream() stream"); 83 } 84 check_reopen(f, "open_wmemstream()"); 85 free(wc); 86 87 return (0); 88 } 89