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LibCore+LibFileSystem: Move resolve_executable_from_environment to Core
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3 changed files with 39 additions and 26 deletions
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@ -1655,4 +1655,39 @@ ErrorOr<void> posix_fallocate(int fd, off_t offset, off_t length)
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}
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#endif
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// This constant is copied from LibFileSystem. We cannot use or even include it directly,
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// because that would cause a dependency of LibCore on LibFileSystem, effectively rendering
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// the distinction between these libraries moot.
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static constexpr StringView INTERNAL_DEFAULT_PATH_SV = "/usr/local/sbin:/usr/local/bin:/usr/bin:/bin"sv;
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ErrorOr<String> resolve_executable_from_environment(StringView filename, int flags)
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{
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if (filename.is_empty())
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return Error::from_errno(ENOENT);
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// Paths that aren't just a file name generally count as already resolved.
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if (filename.contains('/')) {
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TRY(Core::System::access(filename, X_OK, flags));
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return TRY(String::from_utf8(filename));
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}
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auto const* path_str = ::getenv("PATH");
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StringView path;
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if (path_str)
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path = { path_str, strlen(path_str) };
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if (path.is_empty())
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path = INTERNAL_DEFAULT_PATH_SV;
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auto directories = path.split_view(':');
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for (auto directory : directories) {
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auto file = TRY(String::formatted("{}/{}", directory, filename));
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if (!Core::System::access(file, X_OK, flags).is_error())
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return file;
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}
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return Error::from_errno(ENOENT);
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}
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}
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