/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#pragma weak _tempnam = tempnam
#include "lint.h"
#include <mtlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <thread.h>
#include <synch.h>
#include <unistd.h>
#include <sys/stat.h>
#define max(A, B) (((A) < (B))?(B):(A))
static char *pcopy(char *, const char *);
static char seed[] = "AAA";
static mutex_t seed_lk = DEFAULTMUTEX;
char *
tempnam(const char *dir, /* use this directory please (if non-NULL) */
const char *pfx) /* use this (if non-NULL) as filename prefix */
{
char *p, *q, *tdir;
size_t x = 0, y = 0, z;
struct stat64 statbuf;
z = sizeof (P_tmpdir) - 1;
if ((tdir = getenv("TMPDIR")) != NULL) {
x = strlen(tdir);
}
if (dir != NULL) {
if (stat64(dir, &statbuf) == 0 && S_ISDIR(statbuf.st_mode))
y = strlen(dir);
}
if ((p = malloc(max(max(x, y), z)+16)) == NULL)
return (NULL);
if (x > 0 && access(pcopy(p, tdir), (W_OK | X_OK)) == 0)
goto OK;
if (y > 0 && access(pcopy(p, dir), (W_OK | X_OK)) == 0)
goto OK;
if (access(pcopy(p, P_tmpdir), (W_OK | X_OK)) == 0)
goto OK;
if (access(pcopy(p, "/tmp"), (W_OK | X_OK)) != 0) {
free(p);
return (NULL);
}
OK:
(void) strcat(p, "/");
if (pfx) {
*(p+strlen(p)+5) = '\0';
(void) strncat(p, pfx, 5);
}
lmutex_lock(&seed_lk);
(void) strcat(p, seed);
(void) strcat(p, "XXXXXX");
q = seed;
while (*q == 'Z')
*q++ = 'A';
if (*q != '\0')
++*q;
lmutex_unlock(&seed_lk);
if (*mktemp(p) == '\0') {
free(p);
return (NULL);
}
return (p);
}
static char *
pcopy(char *space, const char *arg)
{
char *p;
if (arg) {
(void) strcpy(space, arg);
p = space-1+strlen(space);
while ((p >= space) && (*p == '/'))
*p-- = '\0';
}
return (space);
}