// XXX: update when JVMP_ShmRequest changed
static int JVMP_MarshallShmReq(JVMP_ShmRequest* req,
char* *res, int *plen)
{
#define ADD_VAL(val) \
size = sizeof(val); \
if (pos+size >= len) { len = pos+size+step; buf = realloc(buf, len); } \
memcpy(buf+pos, &val, size); \
pos += size; argc++;
#define ADD_REF(ref, size) \
if (pos+size >= len) { len = pos+size+step; buf = realloc(buf, len); } \
memcpy(buf+pos, ref, size); \
pos += size; argc++;
int len=0, pos=0, size, step=20, argc=0;
char* buf = NULL;
if (!req) return 0;
ADD_VAL(req->rid);
ADD_VAL(req->msg_id);
ADD_VAL(req->func_no);
ADD_VAL(req->retval);
ADD_VAL(req->argc);
ADD_REF(req->argt, strlen(req->argt)+1);
ADD_VAL(req->nullmask);
ADD_VAL(req->length);
ADD_REF(req->data, req->length);
ADD_VAL(req->shmlen);
ADD_VAL(req->shmid);
ADD_VAL(req->caps);
// there's no ADD_REF(req->shmdata, req->length); as it's SHARED
*res = buf;
*plen = pos;
return 1;
}
int rpmsqEnable(int signum, rpmsqAction_t handler)
{
int tblsignum = (signum >= 0 ? signum : -signum);
struct sigaction sa;
rpmsig tbl;
int ret = -1;
for (tbl = rpmsigTbl; tbl->signum >= 0; tbl++) {
if (tblsignum != tbl->signum)
continue;
if (signum >= 0) { /* Enable. */
if (ADD_REF(tbl) <= 0) {
(void) sigdelset(&rpmsqCaught, tbl->signum);
/* XXX Don't set a signal handler if already SIG_IGN */
(void) sigaction(tbl->signum, NULL, &tbl->oact);
if (tbl->oact.sa_handler == SIG_IGN)
continue;
(void) sigemptyset (&sa.sa_mask);
#ifdef SA_SIGINFO
sa.sa_flags = SA_SIGINFO;
#else
sa.sa_flags = 0;
#endif
sa.sa_sigaction = (handler != NULL ? handler : tbl->handler);
if (sigaction(tbl->signum, &sa, &tbl->oact) < 0) {
SUB_REF(tbl);
break;
}
tbl->active = 1; /* XXX just in case */
if (handler != NULL)
tbl->handler = handler;
}
} else { /* Disable. */
if (SUB_REF(tbl) <= 0) {
if (sigaction(tbl->signum, &tbl->oact, NULL) < 0)
break;
tbl->active = 0; /* XXX just in case */
tbl->handler = (handler != NULL ? handler : rpmsqAction);
}
}
ret = tbl->active;
break;
}
return ret;
}
/* Execute LINE as a shell command, returning its status. */
static int
do_system (const char *line)
{
int status, save;
pid_t pid;
struct sigaction sa;
#ifndef _LIBC_REENTRANT
struct sigaction intr, quit;
#endif
sigset_t omask;
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
__sigemptyset (&sa.sa_mask);
DO_LOCK ();
if (ADD_REF () == 0)
{
if (__sigaction (SIGINT, &sa, &intr) < 0)
{
(void) SUB_REF ();
goto out;
}
if (__sigaction (SIGQUIT, &sa, &quit) < 0)
{
save = errno;
(void) SUB_REF ();
goto out_restore_sigint;
}
}
DO_UNLOCK ();
/* We reuse the bitmap in the 'sa' structure. */
__sigaddset (&sa.sa_mask, SIGCHLD);
save = errno;
if (__sigprocmask (SIG_BLOCK, &sa.sa_mask, &omask) < 0)
{
#ifndef _LIBC
if (errno == ENOSYS)
__set_errno (save);
else
#endif
{
DO_LOCK ();
if (SUB_REF () == 0)
{
save = errno;
(void) __sigaction (SIGQUIT, &quit, (struct sigaction *) NULL);
out_restore_sigint:
(void) __sigaction (SIGINT, &intr, (struct sigaction *) NULL);
__set_errno (save);
}
out:
DO_UNLOCK ();
return -1;
}
}
#ifdef CLEANUP_HANDLER
CLEANUP_HANDLER;
#endif
#ifdef FORK
pid = FORK ();
#else
pid = __fork ();
#endif
if (pid == (pid_t) 0)
{
/* Child side. */
const char *new_argv[4];
new_argv[0] = SHELL_NAME;
new_argv[1] = "-c";
new_argv[2] = line;
new_argv[3] = NULL;
/* Restore the signals. */
(void) __sigaction (SIGINT, &intr, (struct sigaction *) NULL);
(void) __sigaction (SIGQUIT, &quit, (struct sigaction *) NULL);
(void) __sigprocmask (SIG_SETMASK, &omask, (sigset_t *) NULL);
INIT_LOCK ();
/* Exec the shell. */
(void) __execve (SHELL_PATH, (char *const *) new_argv, __environ);
_exit (127);
}
else if (pid < (pid_t) 0)
/* The fork failed. */
status = -1;
else
/* Parent side. */
{
/* Note the system() is a cancellation point. But since we call
waitpid() which itself is a cancellation point we do not
have to do anything here. */
if (TEMP_FAILURE_RETRY (__waitpid (pid, &status, 0)) != pid)
status = -1;
}
#ifdef CLEANUP_HANDLER
CLEANUP_RESET;
#endif
save = errno;
DO_LOCK ();
if ((SUB_REF () == 0
&& (__sigaction (SIGINT, &intr, (struct sigaction *) NULL)
| __sigaction (SIGQUIT, &quit, (struct sigaction *) NULL)) != 0)
|| __sigprocmask (SIG_SETMASK, &omask, (sigset_t *) NULL) != 0)
{
#ifndef _LIBC
/* glibc cannot be used on systems without waitpid. */
if (errno == ENOSYS)
__set_errno (save);
else
#endif
status = -1;
}
DO_UNLOCK ();
return status;
}
/* Execute LINE as a shell command, returning its status. */
static int
do_system (const char *line)
{
int status, save;
pid_t pid;
struct sigaction sa;
sigset_t omask;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_IGN;
/*sa.sa_flags = 0; - done by memset */
/*__sigemptyset (&sa.sa_mask); - done by memset */
DO_LOCK ();
if (ADD_REF () == 0)
{
if (sigaction (SIGINT, &sa, &intr) < 0)
{
SUB_REF ();
goto out;
}
if (sigaction (SIGQUIT, &sa, &quit) < 0)
{
save = errno;
SUB_REF ();
goto out_restore_sigint;
}
}
DO_UNLOCK ();
/* We reuse the bitmap in the 'sa' structure. */
__sigaddset (&sa.sa_mask, SIGCHLD);
save = errno;
if (sigprocmask (SIG_BLOCK, &sa.sa_mask, &omask) < 0)
{
{
DO_LOCK ();
if (SUB_REF () == 0)
{
save = errno;
(void) sigaction (SIGQUIT, &quit, (struct sigaction *) NULL);
out_restore_sigint:
(void) sigaction (SIGINT, &intr, (struct sigaction *) NULL);
__set_errno (save);
}
out:
DO_UNLOCK ();
return -1;
}
}
CLEANUP_HANDLER;
pid = FORK ();
if (pid == (pid_t) 0)
{
/* Child side. */
const char *new_argv[4];
new_argv[0] = "/bin/sh";
new_argv[1] = "-c";
new_argv[2] = line;
new_argv[3] = NULL;
/* Restore the signals. */
(void) sigaction (SIGINT, &intr, (struct sigaction *) NULL);
(void) sigaction (SIGQUIT, &quit, (struct sigaction *) NULL);
(void) sigprocmask (SIG_SETMASK, &omask, (sigset_t *) NULL);
INIT_LOCK ();
/* Exec the shell. */
(void) execve ("/bin/sh", (char *const *) new_argv, __environ);
_exit (127);
}
else if (pid < (pid_t) 0)
/* The fork failed. */
status = -1;
else
/* Parent side. */
{
/* Note the system() is a cancellation point. But since we call
waitpid() which itself is a cancellation point we do not
have to do anything here. */
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
status = -1;
}
CLEANUP_RESET;
save = errno;
DO_LOCK ();
if ((SUB_REF () == 0
&& (sigaction (SIGINT, &intr, (struct sigaction *) NULL)
| sigaction (SIGQUIT, &quit, (struct sigaction *) NULL)) != 0)
|| sigprocmask (SIG_SETMASK, &omask, (sigset_t *) NULL) != 0)
{
status = -1;
}
DO_UNLOCK ();
return status;
}