| 1 | #!/usr/bin/env python
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| 2 | #
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| 3 | # Copyright (c) 2008 Martin Decky
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| 4 | # All rights reserved.
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| 5 | #
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| 6 | # Redistribution and use in source and binary forms, with or without
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| 7 | # modification, are permitted provided that the following conditions
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| 8 | # are met:
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| 9 | #
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| 10 | # - Redistributions of source code must retain the above copyright
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| 11 | # notice, this list of conditions and the following disclaimer.
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| 12 | # - Redistributions in binary form must reproduce the above copyright
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| 13 | # notice, this list of conditions and the following disclaimer in the
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| 14 | # documentation and/or other materials provided with the distribution.
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| 15 | # - The name of the author may not be used to endorse or promote products
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| 16 | # derived from this software without specific prior written permission.
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| 17 | #
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| 18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | #
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| 29 |
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| 30 | """
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| 31 | TMPFS creator
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| 32 | """
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| 33 |
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| 34 | import sys
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| 35 | import os
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| 36 | import xstruct
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| 37 |
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| 38 | exclude_names = set(['.svn', '.bzr'])
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| 39 |
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| 40 | HEADER = """little:
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| 41 | char tag[5] /* 'TMPFS' */
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| 42 | """
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| 43 |
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| 44 | DENTRY_NONE = """little:
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| 45 | uint8_t kind /* NONE */
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| 46 | uint32_t fname_len /* 0 */
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| 47 | """
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| 48 |
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| 49 | DENTRY_FILE = """little:
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| 50 | uint8_t kind /* FILE */
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| 51 | uint32_t fname_len /* filename length */
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| 52 | char fname[%d] /* filename */
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| 53 | uint32_t flen /* file length */
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| 54 | """
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| 55 |
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| 56 | DENTRY_DIRECTORY = """little:
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| 57 | uint8_t kind /* DIRECTORY */
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| 58 | uint32_t fname_len /* filename length */
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| 59 | char fname[%d] /* filename */
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| 60 | """
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| 61 |
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| 62 | TMPFS_NONE = 0
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| 63 | TMPFS_FILE = 1
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| 64 | TMPFS_DIRECTORY = 2
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| 65 |
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| 66 | def usage(prname):
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| 67 | "Print usage syntax"
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| 68 | print(prname + " <PATH> <IMAGE>")
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| 69 |
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| 70 | def recursion(root, outf):
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| 71 | "Recursive directory walk"
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| 72 |
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| 73 | for name in os.listdir(root):
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| 74 | canon = os.path.join(root, name)
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| 75 |
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| 76 | if (os.path.isfile(canon) and (not name in exclude_names)):
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| 77 | size = os.path.getsize(canon)
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| 78 |
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| 79 | dentry = xstruct.create(DENTRY_FILE % len(name))
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| 80 | dentry.kind = TMPFS_FILE
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| 81 | dentry.fname_len = len(name)
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| 82 | dentry.fname = name.encode('ascii')
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| 83 | dentry.flen = size
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| 84 |
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| 85 | outf.write(dentry.pack())
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| 86 |
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| 87 | inf = open(canon, "rb")
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| 88 | rd = 0;
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| 89 | while (rd < size):
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| 90 | data = inf.read(4096);
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| 91 | outf.write(data)
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| 92 | rd += len(data)
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| 93 | inf.close()
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| 94 |
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| 95 | if (os.path.isdir(canon) and (not name in exclude_names)):
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| 96 | dentry = xstruct.create(DENTRY_DIRECTORY % len(name))
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| 97 | dentry.kind = TMPFS_DIRECTORY
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| 98 | dentry.fname_len = len(name)
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| 99 | dentry.fname = name.encode('ascii')
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| 100 |
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| 101 | outf.write(dentry.pack())
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| 102 |
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| 103 | recursion(canon, outf)
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| 104 |
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| 105 | dentry = xstruct.create(DENTRY_NONE)
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| 106 | dentry.kind = TMPFS_NONE
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| 107 | dentry.fname_len = 0
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| 108 |
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| 109 | outf.write(dentry.pack())
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| 110 |
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| 111 | def main():
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| 112 | if (len(sys.argv) < 3):
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| 113 | usage(sys.argv[0])
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| 114 | return
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| 115 |
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| 116 | path = os.path.abspath(sys.argv[1])
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| 117 | if (not os.path.isdir(path)):
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| 118 | print("<PATH> must be a directory")
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| 119 | return
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| 120 |
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| 121 | outf = open(sys.argv[2], "wb")
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| 122 |
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| 123 | header = xstruct.create(HEADER)
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| 124 | header.tag = b"TMPFS"
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| 125 |
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| 126 | outf.write(header.pack())
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| 127 |
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| 128 | recursion(path, outf)
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| 129 |
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| 130 | dentry = xstruct.create(DENTRY_NONE)
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| 131 | dentry.kind = TMPFS_NONE
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| 132 | dentry.fname_len = 0
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| 133 |
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| 134 | outf.write(dentry.pack())
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| 135 |
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| 136 | outf.close()
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| 137 |
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| 138 | if __name__ == '__main__':
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| 139 | main()
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