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* process.c (Fsignal_process): Check for process-ids out of pid_t range rather than relying on undefined behavior.

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This commit is contained in:
Paul Eggert 2011-10-13 00:00:35 -07:00
parent 3f4eabd192
commit d83cf4ccb9
2 changed files with 4 additions and 18 deletions
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4
src/ChangeLog
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@ -562,8 +562,8 @@
(sigchld_handler):
Check that fixnums are in proper range for system types.
(Fsignal_process): Simplify by avoiding a goto.
Treat out-of-range process numbers just like invalid numbers
that fit into the pid_t range, and return -1.
Check for process-ids out of pid_t range rather than relying on
undefined behavior.
(Fformat_network_address, read_process_output, send_process)
(Fprocess_send_region, status_notify):
Use ptrdiff_t, not EMACS_INT, where ptrdiff_t is wide enough.

18
src/process.c
View file

@ -5976,22 +5976,8 @@ SIGCODE may be an integer, or a symbol whose name is a signal name. */)
if (NILP (process))
return process;
if (INTEGERP (process))
{
EMACS_INT v = XINT (process);
if (! (TYPE_MINIMUM (pid_t) <= v && v <= TYPE_MAXIMUM (pid_t)))
return make_number (-1);
pid = v;
}
else if (FLOATP (process))
{
double v = XFLOAT_DATA (process);
if (! (TYPE_MINIMUM (pid_t) <= v && v < TYPE_MAXIMUM (pid_t) + 1.0))
return make_number (-1);
pid = v;
if (pid != v)
return make_number (-1);
}
if (NUMBERP (process))
CONS_TO_INTEGER (process, pid_t, pid);
else
{
CHECK_PROCESS (process);