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package debugger
import (
"fmt"
"os"
"syscall"
)
func init() {
attachErrorMessage = attachErrorMessageLinux
}
//lint:file-ignore ST1005 errors here can be capitalized
func attachErrorMessageLinux(pid int, err error) error {
fallbackerr := fmt.Errorf("could not attach to pid %d: %s", pid, err)
if serr, ok := err.(syscall.Errno); ok {
switch serr {
case syscall.EPERM:
bs, err := os.ReadFile("/proc/sys/kernel/yama/ptrace_scope")
if err == nil && len(bs) >= 1 && bs[0] != '0' {
// Yama documentation: https://www.kernel.org/doc/Documentation/security/Yama.txt
return fmt.Errorf("Could not attach to pid %d: this could be caused by a kernel security setting, try writing \"0\" to /proc/sys/kernel/yama/ptrace_scope", pid)
}
fi, err := os.Stat(fmt.Sprintf("/proc/%d", pid))
if err != nil {
return fallbackerr
}
if fi.Sys().(*syscall.Stat_t).Uid != uint32(os.Getuid()) {
return fmt.Errorf("Could not attach to pid %d: current user does not own the process", pid)
}
}
}
return fallbackerr
}
|
