diff options
Diffstat (limited to 'lib/ccdbg-io.c')
| -rw-r--r-- | lib/ccdbg-io.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/ccdbg-io.c b/lib/ccdbg-io.c index acd44f10..9c6693cd 100644 --- a/lib/ccdbg-io.c +++ b/lib/ccdbg-io.c @@ -21,18 +21,20 @@ #include "cc-usb.h" #include "cc-bitbang.h" - struct ccdbg * ccdbg_open(void) { struct ccdbg *dbg; + char *tty; dbg = calloc(sizeof (struct ccdbg), 1); if (!dbg) { perror("calloc"); return NULL; } - dbg->usb = cc_usb_open(); + tty = getenv("CCDBG_TTY"); + if (!tty || tty[0] == '/') + dbg->usb = cc_usb_open(tty); if (!dbg->usb) { dbg->bb = cc_bitbang_open(); if (!dbg->bb) { |