Function cmdline_subst

tinyemu/machine.c:129–172

currently only for "TZ" */

/* currently only for "TZ" */
static char *cmdline_subst(const char *cmdline)
{
    DynBuf dbuf;
    const char *p;
    char var_name[32], *q, buf[32];
    
    dbuf_init(&dbuf);
    p = cmdline;
    while (*p != '\0') {
        if (p[0] == '$' && p[1] == '{') {
            p += 2;
            q = var_name;
            while (*p != '\0' && *p != '}') {
                if ((q - var_name) < sizeof(var_name) - 1)
                    *q++ = *p;
                p++;
            }
            *q = '\0';
            if (*p == '}')
                p++;
            if (!strcmp(var_name, "TZ")) {
                time_t ti;
                struct tm tm;
                int n, sg;
                /* get the offset to UTC */
                time(&ti);
                localtime_r(&ti, &tm);
                n = tm.tm_gmtoff / 60;
                sg = '-';
                if (n < 0) {
                    sg = '+';
                    n = -n;
                }
                snprintf(buf, sizeof(buf), "UTC%c%02d:%02d",
                         sg, n / 60, n % 60);
                dbuf_putstr(&dbuf, buf);
            }
        } else {
            dbuf_putc(&dbuf, *p++);
        }
    }
    dbuf_putc(&dbuf, 0);
    return (char *)dbuf.buf;
}

static BOOL find_name(const char *name, const char *name_list)
{