[unix-history] / lib / libc / db / PORT / clib / mktemp.c

/*
 * Copyright (c) 1987, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)mktemp.c	8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <ctype.h>

static int _gettemp();

mkstemp(path)
	char *path;
{
	int fd;

	return (_gettemp(path, &fd) ? fd : -1);
}

char *
mktemp(path)
	char *path;
{
	return(_gettemp(path, (int *)NULL) ? path : (char *)NULL);
}

static
_gettemp(path, doopen)
	char *path;
	register int *doopen;
{
	extern int errno;
	register char *start, *trv;
	struct stat sbuf;
	u_int pid;

	pid = getpid();
	for (trv = path; *trv; ++trv);		/* extra X's get set to 0's */
	while (*--trv == 'X') {
		*trv = (pid % 10) + '0';
		pid /= 10;
	}

	/*
	 * check the target directory; if you have six X's and it
	 * doesn't exist this runs for a *very* long time.
	 */
	for (start = trv + 1;; --trv) {
		if (trv <= path)
			break;
		if (*trv == '/') {
			*trv = '\0';
			if (stat(path, &sbuf))
				return(0);
			if (!S_ISDIR(sbuf.st_mode)) {
				errno = ENOTDIR;
				return(0);
			}
			*trv = '/';
			break;
		}
	}

	for (;;) {
		if (doopen) {
			if ((*doopen =
			    open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
				return(1);
			if (errno != EEXIST)
				return(0);
		}
		else if (stat(path, &sbuf))
			return(errno == ENOENT ? 1 : 0);

		/* tricky little algorithm for backward compatibility */
		for (trv = start;;) {
			if (!*trv)
				return(0);
			if (*trv == 'z')
				*trv++ = 'a';
			else {
				if (isdigit(*trv))
					*trv = 'a';
				else
					++*trv;
				break;
			}
		}
	}
	/*NOTREACHED*/
}
Commit	Line	Data
fdeaf90b RG	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	static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93";
	36	#endif /* LIBC_SCCS and not lint */
	37
	38	#include <sys/types.h>
	39	#include <sys/stat.h>
	40	#include <fcntl.h>
	41	#include <errno.h>
	42	#include <stdio.h>
	43	#include <ctype.h>
	44
	45	static int _gettemp();
	46
	47	mkstemp(path)
	48	char *path;
	49	{
	50	int fd;
	51
	52	return (_gettemp(path, &fd) ? fd : -1);
	53	}
	54
	55	char *
	56	mktemp(path)
	57	char *path;
	58	{
	59	return(_gettemp(path, (int )NULL) ? path : (char )NULL);
	60	}
	61
	62	static
	63	_gettemp(path, doopen)
	64	char *path;
65	register int *doopen;
66	{
67	extern int errno;
68	register char start, trv;
69	struct stat sbuf;
70	u_int pid;
71
72	pid = getpid();
73	for (trv = path; trv; ++trv); / extra X's get set to 0's */
74	while (*--trv == 'X') {
75	*trv = (pid % 10) + '0';
76	pid /= 10;
77	}
78
79	/*
80	* check the target directory; if you have six X's and it
81	* doesn't exist this runs for a very long time.
82	*/
83	for (start = trv + 1;; --trv) {
84	if (trv <= path)
85	break;
86	if (*trv == '/') {
87	*trv = '\0';
88	if (stat(path, &sbuf))
89	return(0);
90	if (!S_ISDIR(sbuf.st_mode)) {
91	errno = ENOTDIR;
92	return(0);
93	}
94	*trv = '/';
95	break;
96	}
97	}
98
99	for (;;) {
100	if (doopen) {
101	if ((*doopen =
102	open(path, O_CREAT\|O_EXCL\|O_RDWR, 0600)) >= 0)
103	return(1);
104	if (errno != EEXIST)
105	return(0);
106	}
107	else if (stat(path, &sbuf))
108	return(errno == ENOENT ? 1 : 0);
109
110	/* tricky little algorithm for backward compatibility */
111	for (trv = start;;) {
112	if (!*trv)
113	return(0);
114	if (*trv == 'z')
115	*trv++ = 'a';
116	else {
117	if (isdigit(*trv))
118	*trv = 'a';
119	else
120	++*trv;
121	break;
122	}
123	}
124	}
125	/NOTREACHED/
126	}