48 lines
1.0 KiB
Diff
48 lines
1.0 KiB
Diff
From 1f10b4e3364de54f108bc42e4f789893afd44c9a Mon Sep 17 00:00:00 2001
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From: Mickael GARDET <m.gardet@overkiz.com>
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Date: Thu, 1 Sep 2016 17:12:03 +0200
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Subject: [PATCH] Serial POSIX: Check if tty is already opened by another
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stm32flash
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---
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serial_posix.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/serial_posix.c b/serial_posix.c
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index 46b8a94..020e796 100644
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--- a/serial_posix.c
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+++ b/serial_posix.c
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@@ -25,6 +25,7 @@
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#include <termios.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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+#include <sys/file.h>
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#include "serial.h"
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#include "port.h"
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@@ -45,6 +46,13 @@ static serial_t *serial_open(const char *device)
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free(h);
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return NULL;
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}
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+
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+ if(lockf(h->fd,F_TLOCK,0) != 0)
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+ {
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+ fprintf(stderr, "Error: %s is already open\n", device);
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+ free(h);
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+ return NULL;
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+ }
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fcntl(h->fd, F_SETFL, 0);
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tcgetattr(h->fd, &h->oldtio);
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@@ -62,6 +70,7 @@ static void serial_close(serial_t *h)
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{
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serial_flush(h);
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tcsetattr(h->fd, TCSANOW, &h->oldtio);
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+ lockf(h->fd, F_ULOCK, 0);
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close(h->fd);
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free(h);
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}
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--
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2.17.1
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