Subversion Repositories planix.SVN

#if defined(V9) || defined(BSD4_2) || defined(plan9)
#define _BSD_EXTENSION

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>

char *
tempnam(char *dir, char *pfx)
{
        int pid;
        char *tnm;
        struct stat stb;
        static int seq = 0;

        if (dir == NULL)
                dir = ".";
#ifdef plan9
        /* our access emulation has a race when checking for write access */
        if (access(dir, R_OK|X_OK) == -1)
#else
        if (access(dir, R_OK|W_OK|X_OK) == -1)
#endif
                return NULL;
        pid = getpid();
        tnm = malloc(strlen(dir) + 1 + strlen(pfx) + 2*20 + 1);
        if (tnm == NULL)
                return NULL;
        do {
                sprintf(tnm, "%s/%s.%d.%d", dir, pfx, pid, seq++);
                errno = 0;
        } while (stat(tnm, &stb) >= 0 && seq < 256);
        return tnm;
}
#endif