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597a4d6704
- policy/ renamed to scripts/ - By default BROPATH now contains: - scripts/ - scripts/policy - scripts/site - *Nearly* all tests pass. - All of scripts/base/ is loaded by main.cc - Can be disabled by setting $BRO_NO_BASE_SCRIPTS - Scripts in scripts/base/ don't use relative path loading to ease use of BRO_NO_BASE_SCRIPTS (to copy and paste that script). - The scripts in scripts/base/protocols/ only (or soon will only) do logging and state building. - The scripts in scripts/base/frameworks/ add functionality without causing any additional overhead. - All "detection" activity happens through scripts in scripts/policy/. - Communications framework modified temporarily to need an environment variable to actually enable (ENABLE_COMMUNICATION=1) - This is so the communications framework can be loaded as part of the base without causing trouble when it's not needed. - This will be removed once a resolution to ticket #540 is reached.
74 lines
2.3 KiB
Text
74 lines
2.3 KiB
Text
##! Functions to parse and manipulate UNIX style paths and directories.
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const absolute_path_pat = /(\/|[A-Za-z]:[\\\/]).*/;
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## Given an arbitrary string, extracts a single, absolute path (directory
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## with filename).
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## TODO: Make this work on Window's style directories.
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## input: a string that may contain an absolute path
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## Returns: the first absolute path found in input string, else an empty string
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function extract_path(input: string): string
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{
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const dir_pattern = /(\/|[A-Za-z]:[\\\/])([^\"\ ]|(\\\ ))*/;
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local parts = split_all(input, dir_pattern);
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if ( |parts| < 3 )
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return "";
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return parts[2];
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}
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## Compresses a given path by removing '..'s and the parent directory it
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## references and also removing '/'s.
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## dir: a path string, either relative or absolute
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## Returns: a compressed version of the input path
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function compress_path(dir: string): string
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{
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const cdup_sep = /((\/)*([^\/]|\\\/)+)?((\/)+\.\.(\/)*)/;
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local parts = split_n(dir, cdup_sep, T, 1);
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if ( length(parts) > 1 )
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{
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# reaching a point with two parent dir references back-to-back means
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# we don't know about anything higher in the tree to pop off
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if ( parts[2] == "../.." )
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return cat_string_array(parts);
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if ( sub_bytes(parts[2], 0, 1) == "/" )
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parts[2] = "/";
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else
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parts[2] = "";
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dir = cat_string_array(parts);
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return compress_path(dir);
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}
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const multislash_sep = /(\/){2,}/;
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parts = split_all(dir, multislash_sep);
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for ( i in parts )
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if ( i % 2 == 0 )
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parts[i] = "/";
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dir = cat_string_array(parts);
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# remove trailing slashes from path
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if ( |dir| > 1 && sub_bytes(dir, |dir|, 1) == "/" )
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dir = sub_bytes(dir, 0, |dir| - 1);
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return dir;
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}
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## Constructs a path to a file given a directory and a file name.
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## dir: the directory in which the file lives
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## file_name: the name of the file
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## Returns: the concatenation of the directory path and file name, or just
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## the file name if it's already an absolute path
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function build_path(dir: string, file_name: string): string
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{
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return (file_name == absolute_path_pat) ?
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file_name : cat(dir, "/", file_name);
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}
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## Returns a compressed path to a file given a directory and file name.
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## See :bro:id`build_path` and :bro:id:`compress_path`.
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function build_path_compressed(dir: string, file_name: string): string
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{
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return compress_path(build_path(dir, file_name));
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}
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