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36 lines
974 B
Go
36 lines
974 B
Go
package debugger
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import (
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"fmt"
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sys "golang.org/x/sys/unix"
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"io/ioutil"
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"os"
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"syscall"
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)
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func attachErrorMessage(pid int, err error) error {
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fallbackerr := fmt.Errorf("could not attach to pid %d: %s", pid, err)
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if serr, ok := err.(syscall.Errno); ok {
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switch serr {
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case syscall.EPERM:
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bs, err := ioutil.ReadFile("/proc/sys/kernel/yama/ptrace_scope")
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if err == nil && len(bs) >= 1 && bs[0] != '0' {
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// Yama documentation: https://www.kernel.org/doc/Documentation/security/Yama.txt
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return fmt.Errorf("Could not attach to pid %d: set /proc/sys/kernel/yama/ptrace_scope to 0", pid)
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}
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fi, err := os.Stat(fmt.Sprintf("/proc/%d", pid))
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if err != nil {
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return fallbackerr
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}
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if fi.Sys().(*syscall.Stat_t).Uid != uint32(os.Getuid()) {
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return fmt.Errorf("Could not attach to pid %d: current user does not own the process", pid)
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}
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}
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}
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return fallbackerr
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}
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func stopProcess(pid int) error {
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return sys.Kill(pid, sys.SIGSTOP)
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}
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