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Fix temp file race in unused file. If someone wanted to clean the

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tree a little, many files here are likely ripe for removal...
This commit is contained in:
Warner Losh 1998-07-29 03:23:18 +00:00
parent 545f583c55
commit 90bc3b2e4b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=37933
1 changed files with 3 additions and 13 deletions
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16
usr.sbin/amd/config/mtab_file.c
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@ -37,7 +37,7 @@
*
* @(#)mtab_file.c 8.1 (Berkeley) 6/6/93
*
* $Id$
* $Id: mtab_file.c,v 1.4 1997/02/22 16:02:27 peter Exp $
*
*/
@ -271,7 +271,7 @@ mntlist *mp;
* directory as the target mount table
* so that rename() will work.
*/
char tmpname[64];
char tmpname[MAXPATHLEN + 1];
int retries;
int tmpfd;
char *cp;
@ -285,17 +285,7 @@ mntlist *mp;
tmpname[0] = '.'; tmpname[1] = '\0';
}
strcat(tmpname, "/mtabXXXXXX");
mktemp(tmpname);
retries = 0;
enfile1:
if ((tmpfd = open(tmpname, O_RDWR|O_CREAT|O_TRUNC, 0644)) < 0) {
if (errno == ENFILE && retries++ < NFILE_RETRIES) {
sleep(1);
goto enfile1;
}
plog(XLOG_ERROR, "%s: open: %m", tmpname);
return;
}
tmpfd = mktemp(tmpname);
if (close(tmpfd) < 0)
plog(XLOG_ERROR, "Couldn't close tmp file descriptor: %m");