sponge.c

FILE *open_tmpfile (void) {
        struct cs_status cs;
        int tmpfd;
        FILE *tmpfile;
        mode_t mask;
        char *tmpdir;
        char const * const template="%s/sponge.XXXXXX";

        trapsignals();
        cs = cs_enter();
        tmpdir = getenv("TMPDIR");
        if (tmpdir == NULL)
                tmpdir = "/tmp";
        /* Subtract 2 for `%s' and add 1 for the trailing NULL. */
        tmpname=malloc(strlen(tmpdir) + strlen(template) - 2 + 1);