1 /* $OpenBSD: mktemp.c,v 1.2 2024年01月19日 19:45:02 millert Exp $ */ 2 /* 3 * Copyright (c) 2024 Todd C. Miller 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18#include <sys/stat.h> 19#include <errno.h> 20#include <stdlib.h> 21 22 static int 23 mktemp_cb(const char *path, int flags) 24{ 25 struct stat sb; 26 27 if (lstat(path, &sb) == 0) 28 errno = EEXIST; 29 return (errno == ENOENT ? 0 : -1); 30} 31 32 /* Also called via tmpnam(3) and tempnam(3). */ 33 char * 34 _mktemp(char *path) 35{ 36 if (__mktemp4(path, 0, 0, mktemp_cb) == 0) 37 return path; 38 return NULL; 39} 40 41 __warn_references(mktemp, 42 "mktemp() possibly used unsafely; consider using mkstemp()"); 43 44 char * 45 mktemp(char *path) 46{ 47 return _mktemp(path); 48} 49