开放原子开发者工作坊

有时使用yum install时会出现如下错误，导致软件无法安装。

Loaded plugins: fastestmirror
Cleaning repos: base epel extras mysql-connectors-community mysql-tools-community
: mysql56-community updates
14 metadata files removed
0 sqlite files removed
0 metadata files removed
Loaded plugins: fastestmirror
base | 3.6 kB 00:00:00
epel | 4.7 kB 00:00:00
extras | 3.4 kB 00:00:00
mysql-connectors-community | 2.5 kB 00:00:00
mysql-tools-community | 2.5 kB 00:00:00
mysql56-community | 2.5 kB 00:00:00
updates | 3.4 kB 00:00:00
File "/usr/libexec/urlgrabber-ext-down", line 28
except OSError, e:
^
SyntaxError: invalid syntax
File "/usr/libexec/urlgrabber-ext-down", line 28
except OSError, e:
^
SyntaxError: invalid syntax
File "/usr/libexec/urlgrabber-ext-down", line 28
except OSError, e:
^
SyntaxError: invalid syntax
File "/usr/libexec/urlgrabber-ext-down", line 28
except OSError, e:
^
SyntaxError: invalid syntax
File "/usr/libexec/urlgrabber-ext-down", line 28
except OSError, e:
^
SyntaxError: invalid syntax

Exiting on user cancel

这个yum的一个bug，解决的办法是修改/usr/lib/python2.7/site-packages/urlgrabber/grabber.py文件。

elif errcode == 42:
　　# this is probably wrong but ultimately this is what happens
　　# we have a legit http code and a pycurl 'writer failed' code
　　# which almost always means something aborted it from outside
　　# since we cannot know what it is -I'm banking on it being
　　# a ctrl-c. XXXX - if there's a way of going back two raises to
　　# figure out what aborted the pycurl process FIXME
　　raise KeyboardInterrupt

修改后：

#elif errcode == 42:
　　# this is probably wrong but ultimately this is what happens
　　# we have a legit http code and a pycurl 'writer failed' code
　　# which almost always means something aborted it from outside
　　# since we cannot know what it is -I'm banking on it being
　　# a ctrl-c. XXXX - if there's a way of going back two raises to
　　# figure out what aborted the pycurl process FIXME
　　#raise KeyboardInterrupt

然后切换到root用户，执行以下命令：

yum clean metadata

yum clean all

yum upgrade

执行完后，重新执行安装命令，大多数人应该都解决了，但是博主运气较差，并没有解决。

后来各种鼓捣，又修改了/usr/bin/yum文件，将第一行修改为如下内容：

#!/usr/bin/python2

但是新问题又来了：

[root@iz2ze3g36wzfbgvzqas89uz conf]# yum -y install php
  File "/usr/bin/yum", line 30
    except KeyboardInterrupt, e:
                                            ^
SyntaxError: invalid syntax

解决方法就是，修改/usr/libexec/urlgrabber-ext-down文件，将第一行修改为如下内容：

#! /usr/bin/python2

至此，终于可以愉快的安装软件了。