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lib: don't give back the same temporary filenames even if removed.

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workaround for what seems to be a clang/llvm bug/assumption.
This commit is contained in:
Ben Gras 2010-07-14 15:18:50 +00:00
parent 4fcd34137c
commit 8d24932c80
1 changed files with 23 additions and 10 deletions
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33
lib/libc/stdio/mktemp.c
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@ -71,6 +71,8 @@ _gettemp(path, doopen)
register char *start, *trv;
struct stat sbuf;
u_int pid;
static int lastnames = 0;
int names = 0;
pid = getpid();
for (trv = path; *trv; ++trv); /* extra X's get set to 0's */
@ -100,16 +102,6 @@ _gettemp(path, doopen)
}
for (;;) {
if (doopen) {
if ((*doopen =
open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
return(1);
if (errno != EEXIST)
return(0);
}
else if (stat(path, &sbuf))
return(errno == ENOENT ? 1 : 0);
/* tricky little algorithm for backward compatibility */
for (trv = start;;) {
if (!*trv)
@ -124,6 +116,27 @@ _gettemp(path, doopen)
break;
}
}
names++;
if(names <= lastnames)
continue;
lastnames = names;
if (doopen) {
if ((*doopen =
open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) {
return(1);
}
if (errno != EEXIST) {
return(0);
}
}
else if (stat(path, &sbuf)) {
return(errno == ENOENT ? 1 : 0);
}
}
/*NOTREACHED*/
}