free seems to touch errno on windows...?
Signed-off-by: Stefan Tauner <[email protected]>
---
serial.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/serial.c b/serial.c
index 7e47dcc..11a749c 100644
--- a/serial.c
+++ b/serial.c
@@ -109,6 +109,7 @@ fdtype sp_openserport(char *dev, unsigned int baud)
#ifdef _WIN32
HANDLE fd;
char *dev2 = dev;
+ int err;
if ((strlen(dev) > 3) && (tolower((unsigned char)dev[0]) == 'c') &&
(tolower((unsigned char)dev[1]) == 'o') &&
(tolower((unsigned char)dev[2]) == 'm')) {
@@ -122,10 +123,11 @@ fdtype sp_openserport(char *dev, unsigned int baud)
}
fd = CreateFile(dev2, GENERIC_READ | GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, 0, NULL);
+ err = errno; // free may change errno
if (dev2 != dev)
free(dev2);
if (fd == INVALID_HANDLE_VALUE) {
- msg_perr("Error: cannot open serial port: %s\n",
strerror(errno));
+ msg_perr("Error: cannot open serial port: %s\n", strerror(err));
return SER_INV_FD;
}
DCB dcb;
--
Kind regards, Stefan Tauner
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