mirror of
https://github.com/fluencelabs/musl
synced 2025-05-21 11:41:29 +00:00
32 lines
664 B
C
32 lines
664 B
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
#include "libc.h"
|
|
#include "syscall.h"
|
|
#include "atomic.h"
|
|
|
|
#define MAXTRIES 100
|
|
|
|
char *tmpnam(char *s)
|
|
{
|
|
static int index;
|
|
static char s2[L_tmpnam];
|
|
struct timespec ts;
|
|
int try = 0;
|
|
unsigned n;
|
|
|
|
if (!s) s = s2;
|
|
|
|
if (__syscall(SYS_access, P_tmpdir, R_OK|W_OK|X_OK) != 0)
|
|
return NULL;
|
|
|
|
do {
|
|
__syscall(SYS_clock_gettime, CLOCK_REALTIME, &ts, 0);
|
|
n = ts.tv_nsec ^ (uintptr_t)&s ^ (uintptr_t)s;
|
|
snprintf(s, L_tmpnam, "/tmp/t%x-%x", a_fetch_add(&index, 1), n);
|
|
} while (!__syscall(SYS_access, s, F_OK) && try++<MAXTRIES);
|
|
return try>=MAXTRIES ? 0 : s;
|
|
}
|