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Use mkstemp rather than mktemp to prevent races.

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Obtained from: OpenBSD
This commit is contained in:
Warner Losh 1997-03-24 05:45:29 +00:00
parent 722ceb3f84
commit e38b50134c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=24181
1 changed files with 8 additions and 4 deletions
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12
bin/ed/buf.c
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@ -25,7 +25,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: buf.c,v 1.10 1997/02/22 14:03:11 peter Exp $
*/
#ifndef lint
static char * const rcsid = "@(#)buf.c,v 1.4 1994/02/01 00:34:35 alm Exp";
@ -198,14 +198,18 @@ char sfn[15] = ""; /* scratch file name */
int
open_sbuf()
{
int fd = -1;
int u;
isbinary = newline_added = 0;
u = umask(077);
strcpy(sfn, "/tmp/ed.XXXXXX");
if (mktemp(sfn) == NULL || (sfp = fopen(sfn, "w+")) == NULL) {
fprintf(stderr, "%s: %s\n", sfn, strerror(errno));
sprintf(errmsg, "cannot open temp file");
if ((fd = mkstemp(sfn)) == -1 ||
(sfp = fdopen(fd, "w+")) == NULL) {
if (fd != -1)
close(fd);
perror(sfn);
strcpy(errmsg, "cannot open temp file");
umask(u);
return ERR;
}