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tools:iio:iio_event_monitor: save right errno 

Move up error handling code to preserve the errno coming from ioctl(),
before it may be changed by close().

Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
hifive-unleashed-5.1
Hartmut Knaack 2015-05-31 14:39:49 +02:00 committed by Jonathan Cameron
parent 2b6a6e67af
commit 5fdb8c6127
1 changed files with 5 additions and 3 deletions
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8
tools/iio/iio_event_monitor.c
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@ -275,15 +275,17 @@ int main(int argc, char **argv)
}
ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
close(fd);
if (ret == -1 || event_fd == -1) {
ret = -errno;
fprintf(stdout, "Failed to retrieve event fd\n");
if (close(fd) == -1)
perror("Failed to close character device file");
goto error_free_chrdev_name;
}
close(fd);
while (true) {
ret = read(event_fd, &event, sizeof(event));
if (ret == -1) {