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Instead of using stat(2) to see if the admin flag file exists and

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creating it if not, just try to create the file and treat EEXIST
as a non-error.  Coverity CID 104121.
This commit is contained in:
Todd C. Miller
2016-05-06 14:12:08 -06:00
parent bb12328064
commit 151e03fb5b
1 changed files with 7 additions and 9 deletions
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16
plugins/sudoers/sudoers.c
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@@ -1262,9 +1262,8 @@ find_editor(int nfiles, char **files, int *argc_out, char ***argv_out)
static int
create_admin_success_flag(void)
{
struct stat statbuf;
char flagfile[PATH_MAX];
int len, fd = -1;
int len, rval = -1;
debug_decl(create_admin_success_flag, SUDOERS_DEBUG_PLUGIN)
/* Check whether the user is in the admin group. */
@@ -1279,15 +1278,14 @@ create_admin_success_flag(void)
/* Create admin flag file if it doesn't already exist. */
if (set_perms(PERM_USER)) {
if (stat(flagfile, &statbuf) != 0) {
fd = open(flagfile, O_CREAT|O_WRONLY|O_EXCL, 0644);
if (fd != -1)
close(fd);
}
int fd = open(flagfile, O_CREAT|O_WRONLY|O_NONBLOCK|O_EXCL, 0644);
rval = fd != -1 || errno == EEXIST;
if (fd != -1)
close(fd);
if (!restore_perms())
debug_return_int(-1);
rval = -1;
}
debug_return_int(fd != -1);
debug_return_int(rval);
}
#else /* !USE_ADMIN_FLAG */
static int