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# Copyright (C) 2011  Internet Systems Consortium. 

# 

# Permission to use, copy, modify, and distribute this software for any 

# purpose with or without fee is hereby granted, provided that the above 

# copyright notice and this permission notice appear in all copies. 

# 

# THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SYSTEMS CONSORTIUM 

# DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL 

# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL 

# INTERNET SYSTEMS CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, 

# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING 

# FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, 

# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 

# WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 

 

"""Various functions for working with files and directories.""" 

 

from os.path import exists, join 

 

def path_search(filename, paths): 

    """ 

    Searches list of paths to find filename in one of them. The found one will 

    be returned or IOError will be returned if it isn't found. 

    """ 

    for p in paths: 

        f = join(p, filename) 

        if exists(f): 

            return f 

    raise IOError("'" + filename + "' not found in " + str(paths))