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author | ficus <ficus@robocracy.org> | 2012-09-15 22:50:14 +0200 |
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committer | ficus <ficus@robocracy.org> | 2012-09-15 22:50:14 +0200 |
commit | ced83335a5a338cb9c24956b96da526465d94df8 (patch) | |
tree | b345cd21dfcbb9e660aceb2433c92bd50848938f /torouterui/util.py | |
parent | 57a1e70dee45f5cd9493d6d23f8fc7b6435d5388 (diff) | |
download | tui-ced83335a5a338cb9c24956b96da526465d94df8.tar.gz tui-ced83335a5a338cb9c24956b96da526465d94df8.zip |
refactor to distributable format
Diffstat (limited to 'torouterui/util.py')
-rw-r--r-- | torouterui/util.py | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/torouterui/util.py b/torouterui/util.py new file mode 100644 index 0000000..dc3b6c0 --- /dev/null +++ b/torouterui/util.py @@ -0,0 +1,28 @@ +""" +Utility functions used by helper code to crudely grab the output of simple UNIX +command line programs, plus a couple misc other functions. +""" + +import os + +def cli_read(cmd): + p = os.popen(cmd) + return ''.join(p.readlines()) + +def cli_read_lines(cmd): + p = os.popen(cmd) + return p.readlines() + +def fs_read(path): + with open(path, 'r') as f: + return ''.join(f.readlines()) + +def prefix_to_ipv4_mask(prefixlen): + assert(prefixlen >= 0) + assert(prefixlen <= 32) + mask = (0xFFFFFFFF & (0xFFFFFFFF << (32 - prefixlen))) + a = (0xFF000000 & mask) >> 24 + b = (0x00FF0000 & mask) >> 16 + c = (0x0000FF00 & mask) >> 8 + d = (0x000000FF & mask) + return '%d.%d.%d.%d' % (a, b, c, d) |