FILE *f;
int fd;
int flags;
- int plus = !!strchr(mode, '+');
/* Check for valid initial mode character */
if (!strchr("rwa", *mode)) {
}
/* Compute the flags to pass to open() */
- if (plus) flags = O_RDWR;
+ if (strchr(mode, '+')) flags = O_RDWR;
else if (*mode == 'r') flags = O_RDONLY;
else flags = O_WRONLY;
+ if (strchr(mode, 'x')) flags |= O_EXCL;
if (*mode != 'r') flags |= O_CREAT;
if (*mode == 'w') flags |= O_TRUNC;
if (*mode == 'a') flags |= O_APPEND;