1 /* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */
2 /* Changes: Removed mktemp */
5 * Copyright (c) 1987, 1993
6 * The Regents of the University of California. All rights reserved.
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17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
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21 * may be used to endorse or promote products derived from this software
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41 #if defined(LIBC_SCCS) && !defined(lint)
42 static char rcsid[] = "$OpenBSD: mktemp.c,v 1.13 1998/06/30 23:03:13 deraadt Exp $";
43 #endif /* LIBC_SCCS and not lint */
45 #include <sys/types.h>
55 #include "bsd-arc4random.h"
57 static int _gettemp(char *, int *, int, int);
66 return (_gettemp(path, &fd, 0, slen) ? fd : -1);
75 return (_gettemp(path, &fd, 0, 0) ? fd : -1);
82 return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);
86 _gettemp(path, doopen, domkdir, slen)
92 register char *start, *trv, *suffp;
96 if (doopen && domkdir) {
101 for (trv = path; *trv; ++trv)
111 while (*trv == 'X' && pid != 0) {
112 *trv-- = (pid % 10) + '0';
115 while (*trv == 'X') {
118 pid = (arc4random() & 0xffff) % (26+26);
122 c = (pid - 26) + 'a';
128 * check the target directory; if you have six X's and it
129 * doesn't exist this runs for a *very* long time.
131 if (doopen || domkdir) {
137 rval = stat(path, &sbuf);
141 if (!S_ISDIR(sbuf.st_mode)) {
153 open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
157 } else if (domkdir) {
158 if (mkdir(path, 0700) == 0)
162 } else if (lstat(path, &sbuf))
163 return(errno == ENOENT ? 1 : 0);
165 /* tricky little algorithm for backward compatibility */
166 for (trv = start;;) {
176 else if (*trv == 'z') /* inc from z to A */
190 #endif /* !HAVE_MKDTEMP */