/* * This file and its contents are supplied under the terms of the * Common Development and Distribution License ("CDDL"), version 1.0. * You may only use this file in accordance with the terms of version * 1.0 of the CDDL. * * A full copy of the text of the CDDL should have accompanied this * source. A copy of the CDDL is also available via the Internet at * http://www.illumos.org/license/CDDL. */ /* * Copyright 2020 Robert Mustacchi */ /* * In a c99/xpg6 environment freopen(3C) allows you to specify a NULL path to * try and change the fopen() flags. Verify that the memstream functions do not * allow this. Note, freopen(3C) is defined to try and close the stream, hence * you won't see anything here. */ #include #include #include #include #include #include const char * _umem_debug_init(void) { return ("default,verbose"); } const char * _umem_logging_init(void) { return ("fail,contents"); } static void check_reopen(FILE *f, const char *variant) { FILE *new = freopen(NULL, "r", f); if (new != NULL) { errx(EXIT_FAILURE, "TEST FAILED: was able to freopen %s", variant); } if (errno != EBADF) { errx(EXIT_FAILURE, "TEST FAILED: found wrong errno for %s: " "expected %d, found %d", EBADF, errno); } (void) printf("TEST PASSED: %s\n", variant); } int main(void) { FILE *f; char *c; wchar_t *wc; size_t sz; f = fmemopen(NULL, 16, "a+"); if (f == NULL) { err(EXIT_FAILURE, "failed to create fmemopen() stream"); } check_reopen(f, "fmemopen()"); f = open_memstream(&c, &sz); if (f == NULL) { err(EXIT_FAILURE, "failed to create open_memstream() stream"); } check_reopen(f, "open_memstream()"); free(c); f = open_wmemstream(&wc, &sz); if (f == NULL) { err(EXIT_FAILURE, "failed to create open_wmemstream() stream"); } check_reopen(f, "open_wmemstream()"); free(wc); return (0); }