gllvm/shared/filetypes.go

//
// OCCAM
//
// Copyright (c) 2017, SRI International
//
//  All rights reserved.
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// modification, are permitted provided that the following conditions are met:
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//   list of conditions and the following disclaimer.
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//   this list of conditions and the following disclaimer in the documentation
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package shared

import (
	"os/exec"
	"strings"
)

const (
	// File types
	fileTypeUNDEFINED = iota
	fileTypeELFEXECUTABLE
	fileTypeELFOBJECT
	fileTypeELFSHARED
	fileTypeMACHEXECUTABLE
	fileTypeMACHOBJECT
	fileTypeMACHSHARED
	fileTypeARCHIVE
	fileTypeTHINARCHIVE

	fileTypeERROR
)

//iam:
// this is not that robust, because it depends on the file utility "file" which is
// often  missing on docker images (the klee doker file had this problem)
func getFileType(realPath string) (fileType int) {
	// We need the file command to guess the file type
	cmd := exec.Command("file", realPath)
	out, err := cmd.Output()
	if err != nil {
		LogError("There was an error getting the type of %s. Make sure that the 'file' command is installed.", realPath)
		fileType = fileTypeERROR
		return
	}

	fo := string(out)

	if strings.Contains(fo, "ELF") {

		if strings.Contains(fo, "executable") {
			fileType = fileTypeELFEXECUTABLE
		} else if strings.Contains(fo, "shared") {
			fileType = fileTypeELFSHARED
		} else if strings.Contains(fo, "relocatable") {
			fileType = fileTypeELFOBJECT
		} else {
			fileType = fileTypeUNDEFINED
		}

	} else if strings.Contains(fo, "Mach-O") {

		if strings.Contains(fo, "executable") {
			fileType = fileTypeMACHEXECUTABLE
		} else if strings.Contains(fo, "dynamically linked shared") {
			fileType = fileTypeMACHSHARED
		} else if strings.Contains(fo, "object") {
			fileType = fileTypeMACHOBJECT
		} else {
			fileType = fileTypeUNDEFINED
		}

	} else if strings.Contains(fo, "current ar archive") {
		fileType = fileTypeARCHIVE
	} else if strings.Contains(fo, "thin archive") {
		fileType = fileTypeTHINARCHIVE
	} else {
		fileType = fileTypeUNDEFINED
	}
	return
}