[英]IIO: can't open file /sys/bus/iio/devices/iio\:device1/in_voltage_1
I'm trying to use the raw value from an ADC channel. 我试图从一个ADC通道使用原始值。 In my application I do:
在我的应用程序中,我这样做:
open("/sys/bus/iio/devices/iio\:device1/in_voltage_1", O_RDONLY);
That returns errno 2 "No such file or directory", the file is there though since if I do: 返回错误2“没有这样的文件或目录”,该文件是存在的,虽然,因为如果我这样做:
$> cat /sys/bus/iio/devices/iio\:device1/in_voltage_1
I get the value I expect. 我得到了我期望的价值。
It also works if I make a soft link: 如果我进行软链接也可以:
/etc/mylink -> /sys/bus/iio/devices/iio\:device1/in_voltage_1
And opens that link instead. 并改为打开该链接。 The link has the same permissions as the original file.
链接具有与原始文件相同的权限。
What am I missing? 我想念什么?
I'll leave this up despite of my shame, it may help someone. 尽管我感到羞耻,我还是不要管它,它可能会对某人有所帮助。
It's obviously the backslash in the string argument to open. 显然是要打开的string参数中的反斜杠。 The path is actually:
路径实际上是:
/sys/bus/iio/devices/iio:device1/in_voltage_1
but the backslash is needed as an escape in the shell. 但是反斜杠是外壳程序中的转义符。
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