gitlab.com/Raven-IO/raven-delve@v1.22.4/service/debugger/debugger_linux.go (about)

     1  package debugger
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"syscall"
     7  )
     8  
     9  func init() {
    10  	attachErrorMessage = attachErrorMessageLinux
    11  }
    12  
    13  //lint:file-ignore ST1005 errors here can be capitalized
    14  
    15  func attachErrorMessageLinux(pid int, err error) error {
    16  	fallbackerr := fmt.Errorf("could not attach to pid %d: %s", pid, err)
    17  	if serr, ok := err.(syscall.Errno); ok {
    18  		switch serr {
    19  		case syscall.EPERM:
    20  			bs, err := os.ReadFile("/proc/sys/kernel/yama/ptrace_scope")
    21  			if err == nil && len(bs) >= 1 && bs[0] != '0' {
    22  				// Yama documentation: https://www.kernel.org/doc/Documentation/security/Yama.txt
    23  				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)
    24  			}
    25  			fi, err := os.Stat(fmt.Sprintf("/proc/%d", pid))
    26  			if err != nil {
    27  				return fallbackerr
    28  			}
    29  			if fi.Sys().(*syscall.Stat_t).Uid != uint32(os.Getuid()) {
    30  				return fmt.Errorf("Could not attach to pid %d: current user does not own the process", pid)
    31  			}
    32  		}
    33  	}
    34  	return fallbackerr
    35  }