diff options
Diffstat (limited to 'libc/stdio/tmpnam.c')
| -rw-r--r-- | libc/stdio/tmpnam.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/libc/stdio/tmpnam.c b/libc/stdio/tmpnam.c new file mode 100644 index 000000000..3a3ef67ca --- /dev/null +++ b/libc/stdio/tmpnam.c @@ -0,0 +1,68 @@ +/* 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; +} + |