2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
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33 * @(#)mktemp.c 8.1 (Berkeley) 6/4/93
34 * $FreeBSD: src/lib/libc/stdio/mktemp.c,v 1.19.2.3 2002/06/18 09:53:07 robert Exp $
35 * $DragonFly: src/lib/libc/stdio/mktemp.c,v 1.7 2005/11/20 11:07:30 swildner Exp $
38 /* #include "namespace.h" */
39 #include <sys/types.h>
48 /* #include "un-namespace.h" */
50 char *_mktemp (char *);
52 static int _gettemp (char *, int *, int, int);
54 static const unsigned char padchar[] =
55 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
58 mkstemps(char *path, int slen)
62 return (_gettemp(path, &fd, 0, slen) ? fd : -1);
70 return (_gettemp(path, &fd, 0, 0) ? fd : -1);
76 return (_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);
82 return (_gettemp(path, (int *)NULL, 0, 0) ? path : (char *)NULL);
85 __warn_references(mktemp,
86 "warning: mktemp() possibly used unsafely; consider using mkstemp()");
91 return (_mktemp(path));
95 _gettemp(char *path, int *doopen, int domkdir, int slen)
97 char *start, *trv, *suffp;
103 if (doopen != NULL && domkdir) {
108 for (trv = path; *trv != '\0'; ++trv)
118 /* Fill space with random characters */
119 while (trv >= path && *trv == 'X') {
120 psrand = arc4random() % (sizeof(padchar) - 1);
121 *trv-- = padchar[psrand];
126 * check the target directory.
128 if (doopen != NULL || domkdir) {
129 for (; trv > path; --trv) {
132 rval = stat(path, &sbuf);
136 if (!S_ISDIR(sbuf.st_mode)) {
148 _open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
152 } else if (domkdir) {
153 if (mkdir(path, 0700) == 0)
157 } else if (lstat(path, &sbuf))
158 return (errno == ENOENT);
160 /* If we have a collision, cycle through the space of filenames */
161 for (trv = start;;) {
162 if (*trv == '\0' || trv == suffp)
164 pad = strchr(padchar, *trv);
165 if (pad == NULL || *++pad == '\0')