From 68f2cd344eadfbced42da3f28c6b1a6f2d1e8752 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Wed, 25 Jul 2007 10:39:57 +0000
Subject: For bug #186386, pass stdin directly to spawned processes (even when
 their output goes through a pty) so that Ctrl+Z works as on would expect.)

svn path=/main/trunk/; revision=7394
---
 pym/portage/__init__.py | 50 +++++--------------------------------------------
 pym/portage/process.py  | 10 ----------
 2 files changed, 5 insertions(+), 55 deletions(-)

(limited to 'pym')

diff --git a/pym/portage/__init__.py b/pym/portage/__init__.py
index 54ef005a4..ef437a3da 100644
--- a/pym/portage/__init__.py
+++ b/pym/portage/__init__.py
@@ -2380,7 +2380,6 @@ def spawn(mystring, mysettings, debug=0, free=0, droppriv=0, sesandbox=0, fakero
 	mypids = []
 	master_fd = None
 	slave_fd = None
-	stdin_termios = None
 	fd_pipes_orig = None
 	if logfile:
 		del keywords["logfile"]
@@ -2395,39 +2394,10 @@ def spawn(mystring, mysettings, debug=0, free=0, droppriv=0, sesandbox=0, fakero
 		fd_pipes_orig = fd_pipes.copy()
 		stdin_fd = fd_pipes[0]
 		if os.isatty(stdin_fd):
-			# Copy the termios attributes from stdin_fd to the slave_fd and put
-			# the stdin_fd into raw mode with ECHO disabled.  The stdin
-			# termios attributes are reverted before returning, or via the
-			# atexit hook in portage.process when killed by a signal.
-			import termios, tty
-			stdin_termios = termios.tcgetattr(stdin_fd)
-			tty.setraw(stdin_fd)
-			term_attr = termios.tcgetattr(stdin_fd)
-			term_attr[3] &= ~termios.ECHO
-			termios.tcsetattr(stdin_fd, termios.TCSAFLUSH, term_attr)
-			termios.tcsetattr(slave_fd, termios.TCSAFLUSH, stdin_termios)
 			from output import get_term_size, set_term_size
 			rows, columns = get_term_size()
 			set_term_size(rows, columns, slave_fd)
-			pre_exec = keywords.get("pre_exec")
-			def setup_ctty():
-				os.setsid()
-				# Make it into the "controlling terminal".
-				import termios
-				if hasattr(termios, "TIOCSCTTY"):
-					# BSD 4.3 approach
-					import fcntl
-					fcntl.ioctl(0, termios.TIOCSCTTY)
-				else:
-					# SVR4 approach
-					fd = os.open(os.ttyname(0), os.O_RDWR)
-					for x in 0, 1, 2:
-						os.dup2(fd, x)
-					os.close(fd)
-				if pre_exec:
-					pre_exec()
-			keywords["pre_exec"] = setup_ctty
-		fd_pipes[0] = slave_fd
+		fd_pipes[0] = fd_pipes_orig[0]
 		fd_pipes[1] = slave_fd
 		fd_pipes[2] = slave_fd
 		keywords["fd_pipes"] = fd_pipes
@@ -2477,10 +2447,9 @@ def spawn(mystring, mysettings, debug=0, free=0, droppriv=0, sesandbox=0, fakero
 
 	if logfile:
 		log_file = open(logfile, 'a')
-		stdin_file = os.fdopen(os.dup(fd_pipes_orig[0]), 'r')
 		stdout_file = os.fdopen(os.dup(fd_pipes_orig[1]), 'w')
 		master_file = os.fdopen(master_fd, 'w+')
-		iwtd = [stdin_file, master_file]
+		iwtd = [master_file]
 		owtd = []
 		ewtd = []
 		import array, fcntl, select
@@ -2507,26 +2476,17 @@ def spawn(mystring, mysettings, debug=0, free=0, droppriv=0, sesandbox=0, fakero
 					break
 				# Use blocking mode for writes since we'd rather block than
 				# trigger a EWOULDBLOCK error.
-				if f is stdin_file:
-					buf.tofile(master_file)
-					master_file.flush()
-				else:
+				if f is master_file:
 					buf.tofile(stdout_file)
 					stdout_file.flush()
 					buf.tofile(log_file)
 					log_file.flush()
 		log_file.close()
-		stdin_file.close()
 		stdout_file.close()
 		master_file.close()
 	pid = mypids[-1]
-	try:
-		retval = os.waitpid(pid, 0)[1]
-		portage.process.spawned_pids.remove(pid)
-	finally:
-		if stdin_termios:
-			termios.tcsetattr(fd_pipes_orig[0],
-				termios.TCSAFLUSH, stdin_termios)
+	retval = os.waitpid(pid, 0)[1]
+	portage.process.spawned_pids.remove(pid)
 	if retval != os.EX_OK:
 		if retval & 0xff:
 			return (retval & 0xff) << 8
diff --git a/pym/portage/process.py b/pym/portage/process.py
index 8b9ab30e2..fcec7588c 100644
--- a/pym/portage/process.py
+++ b/pym/portage/process.py
@@ -132,16 +132,6 @@ def cleanup():
 
 atexit_register(cleanup)
 
-# Make sure the original terminal attributes are reverted at exit.
-if hasattr(sys.stdin, "isatty") and sys.stdin.isatty():
-	import termios
-	_stdin_termios = termios.tcgetattr(sys.stdin.fileno())
-	def _reset_stdin_termios(stdin_termios):
-		import termios
-		termios.tcsetattr(sys.stdin.fileno(), termios.TCSAFLUSH, stdin_termios)
-	atexit_register(_reset_stdin_termios, _stdin_termios)
-	del termios, _stdin_termios, _reset_stdin_termios
-
 def spawn(mycommand, env={}, opt_name=None, fd_pipes=None, returnpid=False,
           uid=None, gid=None, groups=None, umask=None, logfile=None,
           path_lookup=True, pre_exec=None):
-- 
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