static Thread*
idtotable(int id)
{
if(id >= 0)
return addpid(id, 1);
id = -(id+1);
if(id >= nthr)
return nil;
return &thr[id];
}
// Callback for exc_server below. Called when a thread we are
// watching has an exception like hitting a breakpoint.
kern_return_t
catch_exception_raise(mach_port_t eport, mach_port_t thread,
mach_port_t task, exception_type_t exception,
exception_data_t code, mach_msg_type_number_t ncode)
{
Thread *t;
int i;
t = nil;
for(i=0; i<nthr; i++){
if(thr[i].thread == thread){
t = &thr[i];
goto havet;
}
}
if(nthr > 0)
addpid(thr[0].pid, 1);
for(i=0; i<nthr; i++){
if(thr[i].thread == thread){
t = &thr[i];
goto havet;
}
}
fprint(2, "did not find thread in catch_exception_raise\n");
return KERN_SUCCESS; // let thread continue
havet:
t->exc = exception;
if(ncode > nelem(t->code))
ncode = nelem(t->code);
memmove(t->code, code, ncode*sizeof t->code[0]);
// Suspend thread, so that we can look at it & restart it later.
if(me(thread_suspend(thread)) < 0)
fprint(2, "catch_exception_raise thread_suspend: %r\n");
// Synchronize with waitstop below.
pthread_mutex_lock(&mu);
pthread_cond_broadcast(&cond);
pthread_mutex_unlock(&mu);
return KERN_SUCCESS;
}
// Return list of ids for threads in id.
int
procthreadpids(int id, int *out, int nout)
{
Thread *t;
int i, n, pid;
t = idtotable(id);
if(t == nil)
return -1;
pid = t->pid;
addpid(pid, 1); // force refresh of thread list
n = 0;
for(i=0; i<nthr; i++) {
if(thr[i].pid == pid) {
if(n < nout)
out[n] = -(i+1);
n++;
}
}
return n;
}
/**
*
* @brief
* Send a job over the network to some other server or MOM.
* @par
* Under Linux/Unix, this starts a child process to do the work.
* Connect to the destination host and port,
* and go through the protocol to transfer the job.
* Signals are blocked.
*
* @param[in] jobp - pointer to the job being sent.
* @param[in] hostaddr - the address of host to send job to, host byte order.
* @param[in] port - the destination port, host byte order
* @param[in] move_type - the type of move (e.g. MOVE_TYPE_exec)
* @param[in] post_func - the function to execute once the child process
* sending job completes (Linux/Unix only)
* @param[in] data - input data to 'post_func'
*
* @return int
* @retval 2 parent : success (child forked)
* @retval -1 parent : on failure (pbs_errno set to error number)
* @retval SEND_JOB_OK child : 0 success, job sent
* @retval SEND_JOB_FATAL child : 1 permenent failure or rejection,
* @retval SEND_JOB_RETRY child : 2 failed but try again
* @retval SEND_JOB_NODEDW child : 3 execution node down, retry different node
*/
int
send_job(job *jobp, pbs_net_t hostaddr, int port, int move_type,
void (*post_func)(struct work_task *), struct batch_request *preq)
{
#ifdef WIN32
char cmdline[80];
pio_handles pio;
char buf[4096];
struct work_task *ptask;
int newstate;
int newsub;
long tempval;
char script_name[MAXPATHLEN+1];
int gridproxy_cred = 0;
#ifdef PBS_CRED_GRIDPROXY
if (jobp->ji_extended.ji_ext.ji_credtype == PBS_CREDTYPE_GRIDPROXY)
gridproxy_cred = 1;
#endif
if (pbs_conf.pbs_use_tcp == 1 && move_type == MOVE_TYPE_Exec && gridproxy_cred == 0) {
return (send_job_exec(jobp, hostaddr, port, preq));
}
sprintf(cmdline, "%s/sbin/pbs_send_job", pbs_conf.pbs_exec_path);
if (win_popen(cmdline, "w", &pio, NULL) == 0) {
errno = GetLastError();
pbs_errno = errno;
(void)sprintf(log_buffer, "executing %s for job %s failed errno=%d", cmdline, jobp->ji_qs.ji_jobid, errno);
log_event(PBSEVENT_DEBUG, PBS_EVENTCLASS_JOB, LOG_ERR,
jobp->ji_qs.ji_jobid, log_buffer);
/* force re-eval of job state out of Transit */
svr_evaljobstate(jobp, &newstate, &newsub, 1);
svr_setjobstate(jobp, newstate, newsub);
win_pclose(&pio);
return (-1);
}
ptask = set_task(WORK_Deferred_Child, (long)pio.pi.hProcess, post_func, preq);
if (!ptask) {
log_err(errno, __func__, msg_err_malloc);
errno = ENOMEM;
pbs_errno = errno;
win_pclose(&pio);
/* force re-eval of job state out of Transit */
svr_evaljobstate(jobp, &newstate, &newsub, 1);
svr_setjobstate(jobp, newstate, newsub);
return (-1);
} else {
ptask->wt_parm2 = jobp;
append_link(&((job *)jobp)->ji_svrtask, &ptask->wt_linkobj, ptask);
}
script_name[0] = '\0';
/* if job has a script read it from database */
if (jobp->ji_qs.ji_svrflags & JOB_SVFLG_SCRIPT) {
/*
* copy the job script from database to a temp file
* PBSD_jscript works with a file
* delete it at the end of the send
*/
if (svr_create_tmp_jobscript(jobp, &script_name) != 0) {
pbs_errno = PBSE_SYSTEM;
snprintf(log_buffer, sizeof(log_buffer),
"Failed to create temporary job script for job %s",
jobp->ji_qs.ji_jobid);
log_err(pbs_errno, "send_job", log_buffer);
win_pclose2(&pio);
return (-1);
}
}
addpid(pio.pi.hProcess);
/* our job is to calc eligible time accurately and save it */
/* on new server, accrue type should be calc afresh */
/* Note: if job is being sent for execution on mom, then don't calc eligible time */
if ((jobp->ji_wattr[(int)JOB_ATR_accrue_type].at_val.at_long == JOB_ELIGIBLE) &&
(server.sv_attr[(int)SRV_ATR_EligibleTimeEnable].at_val.at_long == 1) &&
(move_type != MOVE_TYPE_Exec)) {
tempval = ((long)time_now - jobp->ji_wattr[(int)JOB_ATR_sample_starttime].at_val.at_long);
jobp->ji_wattr[(int)JOB_ATR_eligible_time].at_val.at_long += tempval;
jobp->ji_wattr[(int)JOB_ATR_eligible_time].at_flags |= ATR_VFLAG_MODCACHE;
}
/* in windows code, a child process "w32_send_job" handles the send
* This needs the job information, so we save using the filesystem
* This avoids the child process from having to "connect" to the database again
* The file is deleted by the send_job child process when it has done recovering the job
*/
job_save_fs(jobp, SAVEJOB_FULLFORCE); /* so the spawned process can get a fresh copy of job */
if (*jobp->ji_qs.ji_fileprefix != '\0')
sprintf(buf, "jobfile=%s%s\n", jobp->ji_qs.ji_fileprefix, JOB_FILE_SUFFIX);
else
sprintf(buf, "jobfile=%s%s\n", jobp->ji_qs.ji_jobid, JOB_FILE_SUFFIX);
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "destaddr=%ld\n", hostaddr);
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "destport=%d\n", port);
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "move_type=%d\n", move_type);
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "in_server=%d\n", is_linked(&svr_alljobs, &jobp->ji_alljobs));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "server_name=%s\n", (server_name?server_name:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "server_host=%s\n", (server_host?server_host:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "server_addr=%ld\n", pbs_server_addr);
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "server_port=%d\n", pbs_server_port_dis);
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "log_file=%s\n", (log_file?log_file:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "path_log=%s\n", (path_log?path_log:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "path_jobs=%s\n", (path_jobs?path_jobs:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "path_spool=%s\n", (path_spool?path_spool:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "path_rescdef=%s\n", (path_rescdef?path_rescdef:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "path_users=%s\n", (path_users?path_users:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "path_hooks_workdir=%s\n",
(path_hooks_workdir?path_hooks_workdir:""));
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "svr_history_enable=%ld\n", svr_history_enable);
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "svr_history_duration=%ld\n", svr_history_duration);
win_pwrite(&pio, buf, strlen(buf));
if ( (server.sv_attr[SRV_ATR_ssignon_enable].at_flags & \
ATR_VFLAG_SET) && \
(server.sv_attr[SRV_ATR_ssignon_enable].at_val.at_long == 1) )
strcpy(buf, "single_signon_password_enable=1\n");
else
strcpy(buf, "single_signon_password_enable=0\n");
win_pwrite(&pio, buf, strlen(buf));
sprintf(buf, "script_name=%s\n", script_name);
win_pwrite(&pio, buf, strlen(buf));
strcpy(buf, "quit\n");
win_pwrite(&pio, buf, strlen(buf));
win_pclose2(&pio); /* closes all handles except the process handle */
return (2);
#else
pbs_list_head attrl;
enum conn_type cntype = ToServerDIS;
int con;
char *credbuf = NULL;
size_t credlen = 0;
char *destin = jobp->ji_qs.ji_destin;
int encode_type;
int i;
char job_id[PBS_MAXSVRJOBID+1];
attribute *pattr;
pid_t pid;
struct attropl *pqjatr; /* list (single) of attropl for quejob */
char script_name[MAXPATHLEN+1];
struct work_task *ptask;
struct hostent *hp;
struct in_addr addr;
long tempval;
int gridproxy_cred = 0;
int rpp = 0;
#ifdef PBS_CRED_GRIDPROXY
if (jobp->ji_extended.ji_ext.ji_credtype == PBS_CREDTYPE_GRIDPROXY)
gridproxy_cred = 1;
#endif
if (pbs_conf.pbs_use_tcp == 1 && move_type == MOVE_TYPE_Exec && gridproxy_cred == 0) {
return (send_job_exec(jobp, hostaddr, port, preq));
}
script_name[0] = '\0';
/* if job has a script read it from database */
if (jobp->ji_qs.ji_svrflags & JOB_SVFLG_SCRIPT) {
/*
* copy the job script from database to a temp file
* PBSD_jscript works with a file
* delete it at the end of the send
*/
if (svr_create_tmp_jobscript(jobp, script_name) != 0) {
pbs_errno = PBSE_SYSTEM;
snprintf(log_buffer, sizeof(log_buffer),
"Failed to create temporary job script for job %s",
jobp->ji_qs.ji_jobid);
log_err(pbs_errno, "send_job", log_buffer);
return -1;
}
}
pid = fork();
if (pid == -1) { /* Error on fork */
log_err(errno, __func__, "fork failed\n");
pbs_errno = PBSE_SYSTEM;
return -1;
}
if (pid != 0) { /* The parent (main server) */
ptask = set_task(WORK_Deferred_Child, pid, post_func, preq);
if (!ptask) {
log_err(errno, __func__, msg_err_malloc);
return (-1);
} else {
ptask->wt_parm2 = jobp;
append_link(&((job *)jobp)->ji_svrtask,
&ptask->wt_linkobj, ptask);
}
return 2;
}
/*
* the child process
*
* set up signal cather for error return
*/
DBPRT(("%s: child started, sending to port %d\n", __func__, port))
rpp_terminate();
/* Unprotect child from being killed by kernel */
daemon_protect(0, PBS_DAEMON_PROTECT_OFF);
#ifdef WIN32
/* get host name */
/*
* If host address is loopback address then do not resolve with dns
* Use "localhost" as the host name.
*/
if ((htonl(hostaddr) == loopback_addr->sin_addr.s_addr)) {
(void)get_credential(LOCALHOST_SHORTNAME, jobp, PBS_GC_BATREQ,
&credbuf, &credlen);
} else {
#endif
addr.s_addr = htonl(hostaddr);
hp = gethostbyaddr((void *)&addr, sizeof(struct in_addr), AF_INET);
if (hp == NULL) {
sprintf(log_buffer, "%s: h_errno=%d",
inet_ntoa(addr), h_errno);
log_err(-1, __func__, log_buffer);
} else {
/* read any credential file */
(void)get_credential(hp->h_name, jobp, PBS_GC_BATREQ,
&credbuf, &credlen);
}
#ifdef WIN32
}
#endif
/* encode job attributes to be moved */
CLEAR_HEAD(attrl);
/* select attributes/resources to send based on move type */
if (move_type == MOVE_TYPE_Exec) {
resc_access_perm = ATR_DFLAG_MOM;
encode_type = ATR_ENCODE_MOM;
cntype = ToServerDIS;
} else {
resc_access_perm = ATR_DFLAG_USWR | ATR_DFLAG_OPWR |
ATR_DFLAG_MGWR | ATR_DFLAG_SvRD;
encode_type = ATR_ENCODE_SVR;
svr_dequejob(jobp); /* clears default resource settings */
}
/* our job is to calc eligible time accurately and save it */
/* on new server, accrue type should be calc afresh */
/* Note: if job is being sent for execution on mom, then don't calc eligible time */
if ((jobp->ji_wattr[(int)JOB_ATR_accrue_type].at_val.at_long == JOB_ELIGIBLE) &&
(server.sv_attr[(int)SRV_ATR_EligibleTimeEnable].at_val.at_long == 1) &&
(move_type != MOVE_TYPE_Exec)) {
tempval = ((long)time_now - jobp->ji_wattr[(int)JOB_ATR_sample_starttime].at_val.at_long);
jobp->ji_wattr[(int)JOB_ATR_eligible_time].at_val.at_long += tempval;
jobp->ji_wattr[(int)JOB_ATR_eligible_time].at_flags |= ATR_VFLAG_MODCACHE;
}
pattr = jobp->ji_wattr;
for (i=0; i < (int)JOB_ATR_LAST; i++) {
if ((job_attr_def+i)->at_flags & resc_access_perm) {
(void)(job_attr_def+i)->at_encode(pattr+i, &attrl,
(job_attr_def+i)->at_name, (char *)0,
encode_type, NULL);
}
}
attrl_fixlink(&attrl);
/* save the job id for when after we purge the job */
(void)strcpy(job_id, jobp->ji_qs.ji_jobid);
pbs_errno = 0;
con = -1;
for (i=0; i<RETRY; i++) {
/* connect to receiving server with retries */
if (i > 0) { /* recycle after an error */
if (con >= 0)
svr_disconnect(con);
if (should_retry_route(pbs_errno) == -1) {
/* delete the temp script file */
unlink(script_name);
exit(SEND_JOB_FATAL); /* fatal error, don't retry */
}
sleep(1<<i);
}
if ((con = svr_connect(hostaddr, port, 0, cntype, rpp)) ==
PBS_NET_RC_FATAL) {
(void)sprintf(log_buffer, "send_job failed to %lx port %d",
hostaddr, port);
log_err(pbs_errno, __func__, log_buffer);
/* delete the temp script file */
unlink(script_name);
if ((move_type == MOVE_TYPE_Exec) && (pbs_errno == PBSE_BADCRED))
exit(SEND_JOB_NODEDW);
exit(SEND_JOB_FATAL);
} else if (con == PBS_NET_RC_RETRY) {
pbs_errno = ECONNREFUSED; /* should retry */
continue;
}
/*
* if the job is substate JOB_SUBSTATE_TRNOUTCM which means
* we are recovering after being down or a late failure, we
* just want to send the commit"
*/
if (jobp->ji_qs.ji_substate != JOB_SUBSTATE_TRNOUTCM) {
if (jobp->ji_qs.ji_substate != JOB_SUBSTATE_TRNOUT) {
jobp->ji_qs.ji_substate = JOB_SUBSTATE_TRNOUT;
}
pqjatr = &((svrattrl *)GET_NEXT(attrl))->al_atopl;
if (PBSD_queuejob(con, jobp->ji_qs.ji_jobid, destin,
pqjatr, (char *)0, rpp, NULL) == 0) {
if (pbs_errno == PBSE_JOBEXIST &&
move_type == MOVE_TYPE_Exec) {
/* already running, mark it so */
log_event(PBSEVENT_ERROR, PBS_EVENTCLASS_JOB,
LOG_INFO, jobp->ji_qs.ji_jobid,
"Mom reports job already running");
exit(SEND_JOB_OK);
}
else if ((pbs_errno == PBSE_HOOKERROR) ||
(pbs_errno == PBSE_HOOK_REJECT) ||
(pbs_errno == PBSE_HOOK_REJECT_RERUNJOB) ||
(pbs_errno == PBSE_HOOK_REJECT_DELETEJOB)) {
char name_buf[MAXPATHLEN+1];
int rfd;
int len;
char *reject_msg;
int err;
err = pbs_errno;
reject_msg = pbs_geterrmsg(con);
(void)sprintf(log_buffer,
"send of job to %s failed error = %d reject_msg=%s",
destin, err,
reject_msg?reject_msg:"");
log_event(PBSEVENT_JOB, PBS_EVENTCLASS_JOB,
LOG_INFO, jobp->ji_qs.ji_jobid,
log_buffer);
(void)strcpy(name_buf, path_hooks_workdir);
(void)strcat(name_buf, jobp->ji_qs.ji_jobid);
(void)strcat(name_buf, HOOK_REJECT_SUFFIX);
if ((reject_msg != NULL) &&
(reject_msg[0] != '\0')) {
if ((rfd = open(name_buf,
O_RDWR|O_CREAT|O_TRUNC, 0600)) == -1) {
sprintf(log_buffer,
"open of reject file %s failed: errno %d",
name_buf, errno);
log_event(PBSEVENT_JOB,
PBS_EVENTCLASS_JOB,
LOG_INFO, jobp->ji_qs.ji_jobid,
log_buffer);
} else {
#ifdef WIN32
secure_file(name_buf, "Administrators",
READS_MASK|WRITES_MASK|STANDARD_RIGHTS_REQUIRED);
setmode(rfd, O_BINARY);
#endif
len = strlen(reject_msg)+1;
/* write also trailing null char */
if (write(rfd, reject_msg, len) != len) {
sprintf(log_buffer,
"write to file %s incomplete: errno %d", name_buf, errno);
log_event(PBSEVENT_JOB,
PBS_EVENTCLASS_JOB,
LOG_INFO, jobp->ji_qs.ji_jobid,
log_buffer);
}
close(rfd);
}
}
if (err == PBSE_HOOKERROR)
exit(SEND_JOB_HOOKERR);
if (err == PBSE_HOOK_REJECT)
exit(SEND_JOB_HOOK_REJECT);
if (err == PBSE_HOOK_REJECT_RERUNJOB)
exit(SEND_JOB_HOOK_REJECT_RERUNJOB);
if (err == PBSE_HOOK_REJECT_DELETEJOB)
exit(SEND_JOB_HOOK_REJECT_DELETEJOB);
}
else {
(void)sprintf(log_buffer,
"send of job to %s failed error = %d",
destin, pbs_errno);
log_event(PBSEVENT_JOB, PBS_EVENTCLASS_JOB,
LOG_INFO, jobp->ji_qs.ji_jobid,
log_buffer);
continue;
}
}
if (jobp->ji_qs.ji_svrflags & JOB_SVFLG_SCRIPT) {
if (PBSD_jscript(con, script_name, rpp, NULL) != 0)
continue;
}
if (credlen > 0) {
int ret;
ret = PBSD_jcred(con,
jobp->ji_extended.ji_ext.ji_credtype,
credbuf, credlen, rpp, NULL);
if ((ret == 0) || (i == (RETRY - 1)))
free(credbuf); /* free credbuf if cred info is sent successfully OR */
/* at the end of all retry attempts */
if (ret != 0)
continue;
}
if ((move_type == MOVE_TYPE_Exec) &&
(jobp->ji_qs.ji_svrflags & JOB_SVFLG_HASRUN) &&
(hostaddr != pbs_server_addr)) {
/* send files created on prior run */
if ((move_job_file(con, jobp, StdOut, rpp, NULL) != 0) ||
(move_job_file(con, jobp, StdErr, rpp, NULL) != 0) ||
(move_job_file(con, jobp, Chkpt, rpp, NULL) != 0))
continue;
}
jobp->ji_qs.ji_substate = JOB_SUBSTATE_TRNOUTCM;
}
if (PBSD_rdytocmt(con, job_id, rpp, NULL) != 0)
continue;
if (PBSD_commit(con, job_id, rpp, NULL) != 0) {
/* delete the temp script file */
unlink(script_name);
exit(SEND_JOB_FATAL);
}
svr_disconnect(con);
/* delete the temp script file */
unlink(script_name);
exit(SEND_JOB_OK); /* This child process is all done */
}
if (con >= 0)
svr_disconnect(con);
/*
* If connection is actively refused by the execution node(or mother superior) OR
* the execution node(or mother superior) is rejecting request with error
* PBSE_BADHOST(failing to authorize server host), the node should be marked down.
*/
if ((move_type == MOVE_TYPE_Exec) && (pbs_errno == ECONNREFUSED || pbs_errno == PBSE_BADHOST)) {
i = SEND_JOB_NODEDW;
} else if (should_retry_route(pbs_errno) == -1) {
i = SEND_JOB_FATAL;
} else {
i = SEND_JOB_RETRY;
}
(void)sprintf(log_buffer, "send_job failed with error %d", pbs_errno);
log_event(PBSEVENT_DEBUG, PBS_EVENTCLASS_JOB, LOG_NOTICE,
jobp->ji_qs.ji_jobid, log_buffer);
/* delete the temp script file */
unlink(script_name);
exit(i);
return -1; /* NOT REACHED */
#endif /* !WIN32 */
}
int ioctl(int fd, unsigned long int command, ...)
#endif
{
va_list ap;
char *data;
char *vdesock;
int pid;
int callerpid=getpid();
va_start(ap, command);
data = va_arg(ap, char *);
va_end(ap);
if (fd == tapfd[0]) {
if (command == TUNSETIFF) {
struct ifreq *ifr = (struct ifreq *) data;
char num[5];
char name[10];
char scallerpid[6];
ifr->ifr_name[IFNAMSIZ-1] = '\0';
if (ifr->ifr_name[0] == 0) {
if (ifr->ifr_flags & IFF_TAP)
sprintf(name,"tap%d",tapcount++);
else
sprintf(name,"tun%d",tuncount++);
strncpy(ifr->ifr_name,name,IFNAMSIZ);
}
else if (strchr(ifr->ifr_name, '%') != NULL) {
sprintf(name,ifr->ifr_name,tapcount++);
strncpy(ifr->ifr_name,name,IFNAMSIZ);
}
if ((ifr->ifr_flags & IFF_TAP) && (
/* from env: single interface or VDEALLTAP */
((vdesock=getenv(ifr->ifr_name)) != NULL) ||
(vdesock=getenv(VDEALLTAP)) != NULL)
){
if ((pid=fork()) < 0) {
close(tapfd[1]);
errno=EINVAL;
return -1;
} else if (pid > 0) { /*father*/
if((pid=addpid(pid)) < 0) {
close(tapfd[0]);
close(tapfd[1]);
return -1;
} else {
close(tapfd[1]);
return 0;
}
} else { /*son*/
plh=NULL;
close(tapfd[0]);
sprintf(num,"%d",tapfd[1]);
sprintf(scallerpid,"%d",callerpid);
return execlp(VDETAPEXEC,"-",num,vdesock,ifr->ifr_name,
scallerpid,
getvdeopt(ifr,"port"),
getvdeopt(ifr,"group"),
getvdeopt(ifr,"mode"),
(char *) 0);
}
}
else /*roll back to the native tuntap*/
{
int newfd;
int saverrno;
int resultioctl;
close(tapfd[1]);
if ((newfd=native_open(TUNTAPPATH, O_RDWR, 0)) < 0) {
saverrno=errno;
close(tapfd[0]);
errno=saverrno;
return -1;
} else
{
resultioctl=native_ioctl(fd, command, data);
if (resultioctl < 0) {
saverrno=errno;
close(tapfd[0]);
errno=saverrno;
return -1;
} else {
dup2(newfd,tapfd[0]);
return resultioctl;
}
}
}
} else
return 0;
} else
return (native_ioctl(fd, command, data));
}
int
ctlproc(int id, char *msg)
{
Thread *t;
int status;
// Hang/attached dance is for debugging newly exec'ed programs.
// After fork, the child does ctlproc("hang") before exec,
// and the parent does ctlproc("attached") and then waitstop.
// Using these requires the BSD ptrace interface, unlike everything
// else we do, which uses only the Mach interface. Our goal here
// is to do as little as possible using ptrace and then flip over to Mach.
if(strcmp(msg, "hang") == 0)
return ptrace(PT_TRACE_ME, 0, 0, 0);
if(strcmp(msg, "attached") == 0){
// The pid "id" has done a ctlproc "hang" and then
// exec, so we should find it stoppped just before exec
// of the new program.
#undef waitpid
if(waitpid(id, &status, WUNTRACED) < 0){
fprint(2, "ctlproc attached waitpid: %r\n");
return -1;
}
if(WIFEXITED(status) || !WIFSTOPPED(status)){
fprint(2, "ctlproc attached: bad process state\n");
return -1;
}
// Find Mach thread for pid and suspend it.
t = addpid(id, 1);
if(t == nil)
return -1;
if(me(thread_suspend(t->thread)) < 0){
fprint(2, "ctlproc attached: thread_suspend: %r\n");
return -1;
}
// Let ptrace tell the process to keep going:
// then ptrace is out of the way and we're back in Mach land.
return ptrace(PT_CONTINUE, id, (caddr_t)1, 0);
}
// All the other control messages require a Thread structure.
if((t = idtotable(id)) == nil){
werrstr("no such thread");
return -1;
}
if(strcmp(msg, "kill") == 0)
return ptrace(PT_KILL, t->pid, 0, 0);
if(strcmp(msg, "start") == 0)
return threadstart(t, 0);
if(strcmp(msg, "stop") == 0)
return threadstop(t);
if(strcmp(msg, "startstop") == 0){
if(threadstart(t, 0) < 0)
return -1;
return waitstop(t);
}
if(strcmp(msg, "step") == 0){
if(threadstart(t, 1) < 0)
return -1;
return waitstop(t);
}
if(strcmp(msg, "waitstop") == 0)
return waitstop(t);
// sysstop not available on OS X
werrstr("unknown control message");
return -1;
}
