/*
Write exit information to 'exitFile'
*/
func (be *BdsExec) updateExitFile(exitStr string) {
if (be.exitFile != "") && (be.exitFile != "-") {
if DEBUG {
log.Printf("Debug: Writing exit status '%s' to exit file '%s'\n", exitStr, be.exitFile)
}
fileutil.WriteFile(be.exitFile, exitStr)
}
}
/*
Execute a command enforcing a timeout and writing exit status to 'exitFile'
*/
func (be *BdsExec) executeCommandTimeout(osSignal chan os.Signal) int {
if DEBUG {
log.Printf("Debug, executeCommandTimeout\n")
}
// Wait for execution to finish or timeout
exitStr := ""
if be.timeSecs <= 0 {
be.timeSecs = 31536000 // Default: One year
}
// Create a timeout process
// References: http://blog.golang.org/2010/09/go-concurrency-patterns-timing-out-and.html
exitCode := make(chan string, 1)
go execute(be.cmd, exitCode)
// Wait until executions ends, timeout or OS signal
kill := false
run := true
for run {
select {
case exitStr = <-exitCode:
kill = false
run = false
if DEBUG {
log.Printf("Debug, executeCommandTimeout: Execution finished (%s)\n", exitStr)
}
case <-time.After(time.Duration(be.timeSecs) * time.Second):
run = false
kill = true
exitStr = "Time out"
if DEBUG {
log.Printf("Debug, executeCommandTimeout: Timeout!\n")
}
case sig := <-osSignal:
// Ignore some signals (e.g. "window changed")
sigStr := sig.String()
if sigStr != "window changed" && sigStr != "child exited" && sigStr != "window size changes" {
if VERBOSE || DEBUG {
log.Printf("bds: Received OS signal '%s'\n", sigStr)
}
kill = true
exitStr = "Signal received"
run = false
}
}
}
// Write exitCode to file
if (be.exitFile != "") && (be.exitFile != "-") {
if DEBUG {
log.Printf("Info: Writing exit status '%s' to exit file '%s'\n", exitStr, be.exitFile)
}
fileutil.WriteFile(be.exitFile, exitStr)
}
// Should we kill child process?
if kill {
if DEBUG {
log.Printf("Info: Killing process\n")
}
be.cmd.Process.Kill()
be.cmd.Process.Wait() // Reap their souls
}
if kill {
// Should we kill all process groups from taskLoggerFile?
if be.taskLoggerFile != "" {
be.taskLoggerCleanUpAll()
}
// Send a SIGKILL to the process group (just in case any child process is still executing)
if DEBUG {
log.Printf("Info: Killing process group: kill(0, SIGHUP)\n")
}
syscall.Kill(0, syscall.SIGHUP)
}
// OK? exit value should be zero
if exitStr == "0" {
return EXITCODE_OK
}
// Timeout?
if exitStr == "Time out" {
return EXITCODE_TIMEOUT
}
return EXITCODE_ERROR
}