/* 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; }