我想运行一个bash脚本来从BMP280传感器获取值。Errno 13权限被拒绝bash脚本和apache2
#!/bin/bash
echo "Content-type: text/html"
echo ""
read_bme280 --i2c-address 0x76
该网页是空白,在error.log中我得到:
[Tue Mar 29 07:20:40.579423 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: Traceback (most recent call last):
[Tue Mar 29 07:20:40.580102 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: File "/usr/local/bin/read_bme280", line 9, in <module>
[Tue Mar 29 07:20:40.580589 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215:
[Tue Mar 29 07:20:40.581016 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: load_entry_point('bme280==0.2', 'console_scripts', 'read_bme280')()
[Tue Mar 29 07:20:40.581669 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: File "/usr/local/lib/python2.7/dist-packages/bme280/bme280.py", line 210, in main
[Tue Mar 29 07:20:40.582426 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215:
[Tue Mar 29 07:20:40.582811 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: bme280_i2c.set_default_bus(int(args.i2c_bus))
[Tue Mar 29 07:20:40.583487 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: File "/usr/local/lib/python2.7/dist-packages/bme280/bme280_i2c.py", line 22, in set_default_bus
[Tue Mar 29 07:20:40.583991 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215:
[Tue Mar 29 07:20:40.584345 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: default_bus = smbus.SMBus(bus_number)
[Tue Mar 29 07:20:40.584836 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: IOError
[Tue Mar 29 07:20:40.587657 2016] [cgi:error] [pid 1280] [client 10.20.30.127:34334] AH01215: : [Errno 13] Permission denied
从CLI,脚本运行就好了。 找不到“权限被拒绝”问题。
你不能直接从Apache服务器运行bash脚本。看看这个答案 - http://stackoverflow.com/a/8378332/1075324。 tl; dr,在apache中配置cgi-bin并从那里运行脚本。 –
根据回溯,'www-data'用户没有权限调用smbus.SMBus()'? – tripleee
用户www-data被添加到组i2c: #groups www-data www-data:www-data i2c – basante