2 * Copyright (c) 1987, 1993
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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 1.2 2003/06/17 04:26:46 dillon Exp $
38 #include <sys/types.h>
48 char *_mktemp __P((char *));
50 static int _gettemp __P((char *, int *, int, int));
52 static const unsigned char padchar[] =
53 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
62 return (_gettemp(path, &fd, 0, slen) ? fd : -1);
71 return (_gettemp(path, &fd, 0, 0) ? fd : -1);
78 return (_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);
85 return (_gettemp(path, (int *)NULL, 0, 0) ? path : (char *)NULL);
88 __warn_references(mktemp,
89 "warning: mktemp() possibly used unsafely; consider using mkstemp()");
95 return (_mktemp(path));
99 _gettemp(path, doopen, domkdir, slen)
101 register int *doopen;
105 register char *start, *trv, *suffp;
111 if (doopen != NULL && domkdir) {
116 for (trv = path; *trv != '\0'; ++trv)
126 /* Fill space with random characters */
127 while (trv >= path && *trv == 'X') {
128 rand = arc4random() % (sizeof(padchar) - 1);
129 *trv-- = padchar[rand];
134 * check the target directory.
136 if (doopen != NULL || domkdir) {
137 for (; trv > path; --trv) {
140 rval = stat(path, &sbuf);
144 if (!S_ISDIR(sbuf.st_mode)) {
156 _open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
160 } else if (domkdir) {
161 if (mkdir(path, 0700) == 0)
165 } else if (lstat(path, &sbuf))
166 return (errno == ENOENT);
168 /* If we have a collision, cycle through the space of filenames */
169 for (trv = start;;) {
170 if (*trv == '\0' || trv == suffp)
172 pad = strchr(padchar, *trv);
173 if (pad == NULL || *++pad == '\0')