1/*
2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
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
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35#if 0
36static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93";
37#endif
38static const char rcsid[] =
| 1/*
2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
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
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35#if 0
36static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93";
37#endif
38static const char rcsid[] =
|
39 "$FreeBSD: head/lib/libc/stdio/mktemp.c 55837 2000-01-12 09:23:48Z jasone $";
| 39 "$FreeBSD: head/lib/libc/stdio/mktemp.c 56698 2000-01-27 23:07:25Z jasone $";
|
40#endif /* LIBC_SCCS and not lint */
41
42#include <sys/types.h>
43#include <sys/stat.h>
44#include <fcntl.h>
45#include <errno.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <ctype.h>
49#include <unistd.h>
50
51char *_mktemp __P((char *));
52
53static int _gettemp __P((char *, int *, int, int));
54
55int
56mkstemps(path, slen)
57 char *path;
58 int slen;
59{
60 int fd;
61
62 return (_gettemp(path, &fd, 0, slen) ? fd : -1);
63}
64
65int
66mkstemp(path)
67 char *path;
68{
69 int fd;
70
71 return (_gettemp(path, &fd, 0, 0) ? fd : -1);
72}
73
74char *
75mkdtemp(path)
76 char *path;
77{
78 return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);
79}
80
81char *
82_mktemp(path)
83 char *path;
84{
85 return(_gettemp(path, (int *)NULL, 0, 0) ? path : (char *)NULL);
86}
87
88__warn_references(mktemp,
89 "warning: mktemp() possibly used unsafely; consider using mkstemp()");
90
91char *
92mktemp(path)
93 char *path;
94{
95 return(_mktemp(path));
96}
97
98static int
99_gettemp(path, doopen, domkdir, slen)
100 char *path;
101 register int *doopen;
102 int domkdir;
103 int slen;
104{
105 register char *start, *trv, *suffp;
106 struct stat sbuf;
107 int pid, rval;
108
109 if (doopen && domkdir) {
110 errno = EINVAL;
111 return(0);
112 }
113
114 for (trv = path; *trv; ++trv)
115 ;
116 trv -= slen;
117 suffp = trv;
118 --trv;
119 if (trv < path) {
120 errno = EINVAL;
121 return (0);
122 }
123 pid = getpid();
124 while (*trv == 'X' && pid != 0) {
125 *trv-- = (pid % 10) + '0';
126 pid /= 10;
127 }
128 while (*trv == 'X') {
129 char c;
130
131 pid = (arc4random() & 0xffff) % (26+26);
132 if (pid < 26)
133 c = pid + 'A';
134 else
135 c = (pid - 26) + 'a';
136 *trv-- = c;
137 }
138 start = trv + 1;
139
140 /*
141 * check the target directory; if you have six X's and it
142 * doesn't exist this runs for a *very* long time.
143 */
144 if (doopen || domkdir) {
145 for (;; --trv) {
146 if (trv <= path)
147 break;
148 if (*trv == '/') {
149 *trv = '\0';
150 rval = stat(path, &sbuf);
151 *trv = '/';
152 if (rval != 0)
153 return(0);
154 if (!S_ISDIR(sbuf.st_mode)) {
155 errno = ENOTDIR;
156 return(0);
157 }
158 break;
159 }
160 }
161 }
162
163 for (;;) {
164 if (doopen) {
165 if ((*doopen =
| 40#endif /* LIBC_SCCS and not lint */
41
42#include <sys/types.h>
43#include <sys/stat.h>
44#include <fcntl.h>
45#include <errno.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <ctype.h>
49#include <unistd.h>
50
51char *_mktemp __P((char *));
52
53static int _gettemp __P((char *, int *, int, int));
54
55int
56mkstemps(path, slen)
57 char *path;
58 int slen;
59{
60 int fd;
61
62 return (_gettemp(path, &fd, 0, slen) ? fd : -1);
63}
64
65int
66mkstemp(path)
67 char *path;
68{
69 int fd;
70
71 return (_gettemp(path, &fd, 0, 0) ? fd : -1);
72}
73
74char *
75mkdtemp(path)
76 char *path;
77{
78 return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);
79}
80
81char *
82_mktemp(path)
83 char *path;
84{
85 return(_gettemp(path, (int *)NULL, 0, 0) ? path : (char *)NULL);
86}
87
88__warn_references(mktemp,
89 "warning: mktemp() possibly used unsafely; consider using mkstemp()");
90
91char *
92mktemp(path)
93 char *path;
94{
95 return(_mktemp(path));
96}
97
98static int
99_gettemp(path, doopen, domkdir, slen)
100 char *path;
101 register int *doopen;
102 int domkdir;
103 int slen;
104{
105 register char *start, *trv, *suffp;
106 struct stat sbuf;
107 int pid, rval;
108
109 if (doopen && domkdir) {
110 errno = EINVAL;
111 return(0);
112 }
113
114 for (trv = path; *trv; ++trv)
115 ;
116 trv -= slen;
117 suffp = trv;
118 --trv;
119 if (trv < path) {
120 errno = EINVAL;
121 return (0);
122 }
123 pid = getpid();
124 while (*trv == 'X' && pid != 0) {
125 *trv-- = (pid % 10) + '0';
126 pid /= 10;
127 }
128 while (*trv == 'X') {
129 char c;
130
131 pid = (arc4random() & 0xffff) % (26+26);
132 if (pid < 26)
133 c = pid + 'A';
134 else
135 c = (pid - 26) + 'a';
136 *trv-- = c;
137 }
138 start = trv + 1;
139
140 /*
141 * check the target directory; if you have six X's and it
142 * doesn't exist this runs for a *very* long time.
143 */
144 if (doopen || domkdir) {
145 for (;; --trv) {
146 if (trv <= path)
147 break;
148 if (*trv == '/') {
149 *trv = '\0';
150 rval = stat(path, &sbuf);
151 *trv = '/';
152 if (rval != 0)
153 return(0);
154 if (!S_ISDIR(sbuf.st_mode)) {
155 errno = ENOTDIR;
156 return(0);
157 }
158 break;
159 }
160 }
161 }
162
163 for (;;) {
164 if (doopen) {
165 if ((*doopen =
|
166 _libc_open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
| 166 _open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
|
167 return(1);
168 if (errno != EEXIST)
169 return(0);
170 } else if (domkdir) {
171 if (mkdir(path, 0700) == 0)
172 return(1);
173 if (errno != EEXIST)
174 return(0);
175 } else if (lstat(path, &sbuf))
176 return(errno == ENOENT ? 1 : 0);
177
178 /* tricky little algorithm for backward compatibility */
179 for (trv = start;;) {
180 if (*trv == '\0' || trv == suffp)
181 return(0);
182 if (*trv == 'Z')
183 *trv++ = 'a';
184 else {
185 if (isdigit((unsigned char)*trv))
186 *trv = 'a';
187 else if (*trv == 'z') /* inc from z to A */
188 *trv = 'A';
189 else
190 ++*trv;
191 break;
192 }
193 }
194 }
195 /*NOTREACHED*/
196}
| 167 return(1);
168 if (errno != EEXIST)
169 return(0);
170 } else if (domkdir) {
171 if (mkdir(path, 0700) == 0)
172 return(1);
173 if (errno != EEXIST)
174 return(0);
175 } else if (lstat(path, &sbuf))
176 return(errno == ENOENT ? 1 : 0);
177
178 /* tricky little algorithm for backward compatibility */
179 for (trv = start;;) {
180 if (*trv == '\0' || trv == suffp)
181 return(0);
182 if (*trv == 'Z')
183 *trv++ = 'a';
184 else {
185 if (isdigit((unsigned char)*trv))
186 *trv = 'a';
187 else if (*trv == 'z') /* inc from z to A */
188 *trv = 'A';
189 else
190 ++*trv;
191 break;
192 }
193 }
194 }
195 /*NOTREACHED*/
196}
|