home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
rtsi.com
/
2014.01.www.rtsi.com.tar
/
www.rtsi.com
/
OS9
/
OSK
/
NETWORK
/
ISP
/
bind.4.8.3.lzh
/
BIND483
/
RES
/
mktemp.c
< prev
next >
Wrap
Text File
|
1994-09-23
|
3KB
|
118 lines
/*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)mktemp.c 5.8 (Berkeley - modified) 10/16/89";
#endif /* LIBC_SCCS and not lint */
#ifdef OSK
#include <types.h>
#include <file.h>
#include <stat.h>
#else
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <ctype.h>
#ifndef S_ISDIR
#define S_ISDIR(m) ((m & 0170000) == 0040000)
#endif
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*/
}