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tmpnam.c
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1993-08-29
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3KB
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/* This is file TMPNAM.C */
/* This file may have been modified by DJ Delorie (Jan 1991). If so,
** these modifications are Coyright (C) 1993 DJ Delorie, 24 Kirsten Ave,
** Rochester NH, 03867-2954, USA.
*/
/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)tmpnam.c 4.8 (Berkeley) 6/22/90";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/types.h>
#include <stdio.h>
#ifndef P_tmpdir
#define P_tmpdir "/usr/tmp"
#endif
typedef struct FILE_a {
char *name;
struct FILE_a *next;
} FILE_a;
static int close_registered=0;
static FILE_a *file_a=0;
static void tmp_close()
{
while (file_a)
{
FILE_a *n = file_a->next;
unlink(file_a->name);
free(file_a->name);
free(file_a);
file_a = n;
}
}
FILE *
tmpfile()
{
FILE *fp;
FILE_a *filea;
char *f, *tmpnam();
if (!(f = tmpnam((char *)NULL)) || !(fp = fopen(f, "w+"))) {
fprintf(stderr, "tmpfile: cannot open %s.\n", f);
return(NULL);
}
if (close_registered == 0)
{
atexit(tmp_close);
close_registered = 1;
}
filea = (FILE_a *)malloc(sizeof(FILE_a));
if (filea)
{
filea->name = strdup(f);
filea->next = file_a;
file_a = filea;
}
return(fp);
}
static char *tmpnam_buf;
char *
tmpnam(s)
char *s;
{
char *malloc(), *mktemp();
if (!s)
{
if (tmpnam_buf == 0)
tmpnam_buf = malloc((u_int)MAXPATHLEN);
if (tmpnam_buf == 0)
return(NULL);
s = tmpnam_buf;
}
(void)sprintf(s, "%s/XXXXXX", P_tmpdir);
return(mktemp(s));
}
char *
tempnam(dir, pfx)
char *dir, *pfx;
{
char *f, *name, *getenv(), *malloc(), *mktemp();
if (!(name = malloc((u_int)MAXPATHLEN)))
return(NULL);
if (f = getenv("TMPDIR")) {
(void)sprintf(name, "%s/%sXXXXXX", f, pfx ? pfx : "");
if (f = mktemp(name))
return(f);
}
if (dir) {
(void)sprintf(name, "%s/%sXXXXXX", dir, pfx ? pfx : "");
if (f = mktemp(name))
return(f);
}
(void)sprintf(name, "%s/%sXXXXXX", P_tmpdir, pfx ? pfx : "");
if (f = mktemp(name))
return(f);
(void)sprintf(name, "/tmp/%sXXXXXX", pfx ? pfx : "");
if (!(f = mktemp(name)))
(void)free(name);
return(f);
}