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/* vi: set sw=4 ts=4: */
/*
* tmpnam for uClibc
*
* Copyright (C) 2000 by David Whedon <dwhedon@gordian.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
* for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Modified by Erik Andersen <anderse@debian.org> to be reentrant for
* the case when S != NULL...
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
static char tmpnam_buffer[L_tmpnam];
/* Generate a unique filename in /tmp */
char * tmpnam (char *s)
{
int num __attribute__ ((unused)); /* UNINITIALIZED, so we get whatever crap
happens to be in memory, producing (in theory)
pseudo-random tmpname results... */
int n2;
char buf[L_tmpnam], *ptr;
struct stat statbuf;
unsigned char l, i;
ptr=s ? s : buf;
l = snprintf(ptr, L_tmpnam, "%s/tmp.", P_tmpdir);
again:
n2 = num;
for (i = l ; i < l + 6; i++) {
ptr[i] = '0' + n2 % 10;
n2 /= 10;
}
if (stat (ptr, &statbuf) == 0){
num++;
goto again;
}
if (s == NULL)
return (char *) memcpy (tmpnam_buffer, ptr, L_tmpnam);
return ptr;
}
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