3a42ca252d
- Add ExclusiveLock struct with JSON marshaling and validation - Implement IsProcessAlive() with EPERM fail-safe behavior - Add ShouldSkipDatabase() with stale lock cleanup - Integrate lock checking into daemon sync cycle - Return holder name on stale removal for better logging - Case-insensitive hostname comparison - Comprehensive unit tests (89.3% coverage) - Documentation updates (ADVANCED.md, AGENTS.md) - Add .beads/.exclusive-lock to .gitignore Closes bd-115, bd-116, bd-117, bd-118, bd-119, bd-120, bd-121, bd-122 Amp-Thread-ID: https://ampcode.com/threads/T-0b835739-0d79-4ef9-aa62-8446a368c42d Co-authored-by: Amp <amp@ampcode.com>
48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
package types
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
"strings"
|
|
"syscall"
|
|
)
|
|
|
|
// IsProcessAlive checks if a process with the given PID is alive on the given hostname.
|
|
// If hostname doesn't match the current host, it returns true (cannot verify remote, assume alive).
|
|
// If hostname matches the current host, it checks if the PID exists.
|
|
// Permission errors are treated as "alive" (fail-safe: better to skip than wrongly remove a lock).
|
|
func IsProcessAlive(pid int, hostname string) bool {
|
|
currentHost, err := os.Hostname()
|
|
if err != nil {
|
|
// Can't determine current hostname, assume process is alive (fail-safe)
|
|
return true
|
|
}
|
|
|
|
// Case-insensitive hostname comparison to handle FQDN vs short name differences
|
|
if !strings.EqualFold(hostname, currentHost) {
|
|
return true
|
|
}
|
|
|
|
// Check if process exists on local host
|
|
process, err := os.FindProcess(pid)
|
|
if err != nil {
|
|
// On Unix, FindProcess always succeeds, so this is unlikely
|
|
return false
|
|
}
|
|
|
|
// Send signal 0 to check if process exists without actually sending a signal
|
|
err = process.Signal(syscall.Signal(0))
|
|
if err == nil {
|
|
return true
|
|
}
|
|
|
|
// Only mark as dead on ESRCH (no such process)
|
|
// EPERM (permission denied) and other errors => assume alive (fail-safe)
|
|
var errno syscall.Errno
|
|
if errors.As(err, &errno) && errno == syscall.ESRCH {
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|