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* perthread.h (vfork_save): Add ctty, sid, pgid, exitval fields.

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(vfork_save::restore_pid): New method.
(vfork_save::restore_exit): New method.
* fork.cc (vfork): Save ctty, sid, pgid and restore them when returning to
"parent".  Use exitval field if exiting but never created a new process.
* syscalls.cc (setsid): Detect when in "vfork" and force an actual fork so that
pid will be allocated (UGLY!).
(getsid): New function.
* dcrt0.cc (do_exit): Use vfork_save::restore_exit method for returning from a
vfork.
* spawn.cc (spawnve): Use vfork_save::{restore_pid,restore_exit} methods for
returning from vfork.
* cygwin.din: Export getsid.
* include/cygwin/version.h: Bump api minor number.
* malloc.cc: #ifdef sYSTRIm for when MORECORE_CANNOT_TRIM is true.
This commit is contained in:
Christopher Faylor
2002-08-18 05:49:26 +00:00
parent d17ba05c1c
commit 8dca9e2302
9 changed files with 99 additions and 19 deletions
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20
winsup/cygwin/perthread.h
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@ -48,14 +48,30 @@ public:
};
#if defined (NEED_VFORK)
struct vfork_save
class vfork_save
{
int pid;
jmp_buf j;
int exitval;
public:
int pid;
DWORD frame[100];
char **vfork_ebp;
char **vfork_esp;
int ctty;
pid_t sid;
pid_t pgid;
int is_active () { return pid < 0; }
void restore_pid (int val)
{
pid = val;
longjmp (j, 1);
}
void restore_exit (int val)
{
exitval = val;
longjmp (j, 1);
}
friend int vfork ();
};
class per_thread_vfork : public per_thread