#include <stdio.h>
-#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
#include <string.h>
-#include <limits.h>
-#include <unistd.h>
-#include "libc.h"
-
-char *tmpnam(char *s)
-{
- static int lock;
- static int index;
- static char *s2;
- int pid = getpid();
- char *dir = getenv("TMPDIR");
-
- if (!s) {
- if (!s2) s2 = malloc(L_tmpnam);
- s = s2;
- }
-
- /* this interface is insecure anyway but at least we can try.. */
- if (!dir || strlen(dir) > L_tmpnam-32)
- dir = P_tmpdir;
+#include <stdlib.h>
+#include "syscall.h"
- if (access(dir, R_OK|W_OK|X_OK) != 0)
- return NULL;
+#define MAXTRIES 100
- LOCK(&lock);
- for (index++; index < TMP_MAX; index++) {
- snprintf(s, L_tmpnam, "%s/temp%d-%d", dir, pid, index);
- if (access(s, F_OK) != 0) {
- UNLOCK(&lock);
- return s;
- }
+char *tmpnam(char *buf)
+{
+ static char internal[L_tmpnam];
+ char s[] = "/tmp/tmpnam_XXXXXX";
+ int try;
+ int r;
+ for (try=0; try<MAXTRIES; try++) {
+ __randname(s+12);
+#ifdef SYS_readlink
+ r = __syscall(SYS_readlink, s, (char[1]){0}, 1);
+#else
+ r = __syscall(SYS_readlinkat, AT_FDCWD, s, (char[1]){0}, 1);
+#endif
+ if (r == -ENOENT) return strcpy(buf ? buf : internal, s);
}
- UNLOCK(&lock);
- return NULL;
+ return 0;
}