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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include "libc.h"
char *tempnam(const char *dir, const char *pfx)
{
static int lock;
static int index;
char *s;
int pid = getpid();
int l;
if (!dir) dir = P_tmpdir;
if (!pfx) pfx = "temp";
if (access(dir, R_OK|W_OK|X_OK) != 0)
return NULL;
l = strlen(dir) + 1 + strlen(pfx) + 2 + sizeof(int)*3*2 + 1;
s = malloc(l);
if (!s) {
errno = ENOMEM;
return NULL;
}
LOCK(&lock);
for (; index < TMP_MAX; index++) {
snprintf(s, l, "%s/%s-%d-%d", dir, pfx, pid, index);
if (access(s, F_OK) != 0) {
UNLOCK(&lock);
return s;
}
}
UNLOCK(&lock);
free(s);
return NULL;
}
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