63 lines
1.1 KiB
Go
63 lines
1.1 KiB
Go
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package fat
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import (
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"fmt"
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"io"
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"os"
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"strings"
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)
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// Split a Fat binary into multiple Mach-O binaries
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// @ifile: path to Fat binary
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// returns a list of file path of splited Mach-O binaries
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func CreateMachosFromFat(ifile string) ([]string, error) {
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f, err := os.OpenFile(ifile, os.O_RDONLY, 0644)
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if err != nil {
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fmt.Println("Cannot open file")
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return []string{}, err
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}
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var fc FatContext
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fc.ParseFile(f)
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var r []string
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for _, arch := range fc.Machos() {
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offset := arch.Offset
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size := arch.Size
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buf := make([]byte, size)
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filename := fmt.Sprintf(
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"%s_%x",
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strings.ReplaceAll(ifile, " ", "_"),
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offset,
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)
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var err error
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_, err = f.Seek(int64(offset), io.SeekStart)
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if err != nil {
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return r, err
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}
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_, err = f.Read(buf)
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if err != nil {
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return r, err
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}
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outfile, err := os.OpenFile(
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filename,
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os.O_CREATE|os.O_WRONLY,
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0777,
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)
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if err != nil {
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return r, err
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}
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_, err = outfile.Write(buf)
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if err != nil {
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return r, err
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}
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r = append(r, filename) // everything is find, append new file path
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}
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return r, nil
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}
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