diff options
Diffstat (limited to 'termios')
| -rw-r--r-- | termios/Makefile | 2 | ||||
| -rw-r--r-- | termios/tcgetsid.c | 64 | ||||
| -rw-r--r-- | termios/termios.h | 14 |
3 files changed, 79 insertions, 1 deletions
diff --git a/termios/Makefile b/termios/Makefile index b637633e52..7d13928f88 100644 --- a/termios/Makefile +++ b/termios/Makefile @@ -25,6 +25,6 @@ headers := termios.h bits/termios.h sys/ttydefaults.h sys/termios.h \ sys/ttychars.h routines := speed cfsetspeed tcsetattr tcgetattr tcgetpgrp tcsetpgrp \ - tcdrain tcflow tcflush tcsendbrk cfmakeraw + tcdrain tcflow tcflush tcsendbrk cfmakeraw tcgetsid include ../Rules diff --git a/termios/tcgetsid.c b/termios/tcgetsid.c new file mode 100644 index 0000000000..b83858f420 --- /dev/null +++ b/termios/tcgetsid.c @@ -0,0 +1,64 @@ +/* Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <termios.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <unistd.h> + +/* Return the session ID of FD. */ +pid_t +tcgetsid (fd) + int fd; +{ + pid_t pgrp; + pid_t sid; +#ifdef TIOCGSID + static int tiocgsid_works = 1; + + if (tiocgsid_works) + { + int serrno = errno; + int sid; + + if (__ioctl (fd, TIOCGSID, &sid) < 0) + { + if (errno == EINVAL) + { + tiocgsid_works = 0; + __set_errno (serrno); + } + else + return (pid_t) -1; + } + else + return (pid_t) sid; + } +#endif + + pgrp = tcgetpgrp (fd); + if (pgrp == -1) + return (pid_t) -1; + + sid = getsid (pgrp); + if (sid == -1 && errno == ESRCH) + __set_errno (ENOTTY); + + return sid; +} diff --git a/termios/termios.h b/termios/termios.h index 3c8d16eed8..0b06f09587 100644 --- a/termios/termios.h +++ b/termios/termios.h @@ -24,6 +24,14 @@ #define _TERMIOS_H 1 #include <features.h> +#ifdef __USE_UNIX98 +/* We need `pid_t'. */ +# include <bits/types.h> +# ifndef pid_t +typedef __pid_t pid_t; +# define pid_t pid_t +# endif +#endif __BEGIN_DECLS @@ -85,6 +93,12 @@ extern int tcflush __P ((int __fd, int __queue_selector)); extern int tcflow __P ((int __fd, int __action)); +#ifdef __USE_UNIX98 +/* Get process group ID for session leader for controlling terminal FD. */ +extern __pid_t tcgetsid __P ((int __fd)); +#endif + + #ifdef __USE_BSD # include <sys/ttydefaults.h> #endif |