diff options
Diffstat (limited to 'winsup/cygwin/syscalls.cc')
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 45 |
1 files changed, 41 insertions, 4 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index 31eed42b2e8..f047cbd1cb8 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -36,6 +36,9 @@ details. */ #include <unistd.h> #include "shared_info.h" #include "cygheap.h" +#define NEED_VFORK +#include <setjmp.h> +#include "perthread.h" SYSTEM_INFO system_info; @@ -265,11 +268,24 @@ getppid () extern "C" pid_t setsid (void) { - if (myself->pgid != _getpid ()) + vfork_save *vf = vfork_storage.val (); + /* This is a horrible, horrible kludge */ + if (vf && vf->pid < 0) { - if (myself->ctty == TTY_CONSOLE && - !cygheap->fdtab.has_console_fds () && - !check_pty_fds ()) + pid_t pid = fork (); + if (pid > 0) + { + syscall_printf ("longjmping due to vfork"); + vf->restore_pid (pid); + } + /* assuming that fork was successful */ + } + + if (myself->pgid != myself->pid) + { + if (myself->ctty == TTY_CONSOLE + && !cygheap->fdtab.has_console_fds () + && !check_pty_fds ()) FreeConsole (); myself->ctty = -1; myself->sid = _getpid (); @@ -277,10 +293,31 @@ setsid (void) syscall_printf ("sid %d, pgid %d, ctty %d", myself->sid, myself->pgid, myself->ctty); return myself->sid; } + set_errno (EPERM); return -1; } +extern "C" pid_t +getsid (pid_t pid) +{ + pid_t res; + if (!pid) + res = myself->sid; + else + { + pinfo p (pid); + if (p) + res = p->sid; + else + { + set_errno (ESRCH); + res = -1; + } + } + return res; +} + extern "C" ssize_t _read (int fd, void *ptr, size_t len) { |