--- /dev/null
+"""SCons.Platform.posix
+
+Platform-specific initialization for POSIX (Linux, UNIX, etc.) systems.
+
+There normally shouldn't be any need to import this module directly. It
+will usually be imported through the generic SCons.Platform.Platform()
+selection method.
+"""
+
+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 The SCons Foundation
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__revision__ = "src/engine/SCons/Platform/posix.py 5023 2010/06/14 22:05:46 scons"
+
+import errno
+import os
+import os.path
+import subprocess
+import sys
+import select
+
+import SCons.Util
+from SCons.Platform import TempFileMunge
+
+exitvalmap = {
+ 2 : 127,
+ 13 : 126,
+}
+
+def escape(arg):
+ "escape shell special characters"
+ slash = '\\'
+ special = '"$()'
+
+ arg = arg.replace(slash, slash+slash)
+ for c in special:
+ arg = arg.replace(c, slash+c)
+
+ return '"' + arg + '"'
+
+def exec_system(l, env):
+ stat = os.system(' '.join(l))
+ if stat & 0xff:
+ return stat | 0x80
+ return stat >> 8
+
+def exec_spawnvpe(l, env):
+ stat = os.spawnvpe(os.P_WAIT, l[0], l, env)
+ # os.spawnvpe() returns the actual exit code, not the encoding
+ # returned by os.waitpid() or os.system().
+ return stat
+
+def exec_fork(l, env):
+ pid = os.fork()
+ if not pid:
+ # Child process.
+ exitval = 127
+ try:
+ os.execvpe(l[0], l, env)
+ except OSError, e:
+ exitval = exitvalmap.get(e[0], e[0])
+ sys.stderr.write("scons: %s: %s\n" % (l[0], e[1]))
+ os._exit(exitval)
+ else:
+ # Parent process.
+ pid, stat = os.waitpid(pid, 0)
+ if stat & 0xff:
+ return stat | 0x80
+ return stat >> 8
+
+def _get_env_command(sh, escape, cmd, args, env):
+ s = ' '.join(args)
+ if env:
+ l = ['env', '-'] + \
+ [escape(t[0])+'='+escape(t[1]) for t in env.items()] + \
+ [sh, '-c', escape(s)]
+ s = ' '.join(l)
+ return s
+
+def env_spawn(sh, escape, cmd, args, env):
+ return exec_system([_get_env_command( sh, escape, cmd, args, env)], env)
+
+def spawnvpe_spawn(sh, escape, cmd, args, env):
+ return exec_spawnvpe([sh, '-c', ' '.join(args)], env)
+
+def fork_spawn(sh, escape, cmd, args, env):
+ return exec_fork([sh, '-c', ' '.join(args)], env)
+
+def process_cmd_output(cmd_stdout, cmd_stderr, stdout, stderr):
+ stdout_eof = stderr_eof = 0
+ while not (stdout_eof and stderr_eof):
+ try:
+ (i,o,e) = select.select([cmd_stdout, cmd_stderr], [], [])
+ if cmd_stdout in i:
+ str = cmd_stdout.read()
+ if len(str) == 0:
+ stdout_eof = 1
+ elif stdout is not None:
+ stdout.write(str)
+ if cmd_stderr in i:
+ str = cmd_stderr.read()
+ if len(str) == 0:
+ #sys.__stderr__.write( "stderr_eof=1\n" )
+ stderr_eof = 1
+ else:
+ #sys.__stderr__.write( "str(stderr) = %s\n" % str )
+ stderr.write(str)
+ except select.error, (_errno, _strerror):
+ if _errno != errno.EINTR:
+ raise
+
+def exec_popen3(l, env, stdout, stderr):
+ proc = subprocess.Popen(' '.join(l),
+ stdout=stdout,
+ stderr=stderr,
+ shell=True)
+ stat = proc.wait()
+ if stat & 0xff:
+ return stat | 0x80
+ return stat >> 8
+
+def exec_piped_fork(l, env, stdout, stderr):
+ # spawn using fork / exec and providing a pipe for the command's
+ # stdout / stderr stream
+ if stdout != stderr:
+ (rFdOut, wFdOut) = os.pipe()
+ (rFdErr, wFdErr) = os.pipe()
+ else:
+ (rFdOut, wFdOut) = os.pipe()
+ rFdErr = rFdOut
+ wFdErr = wFdOut
+ # do the fork
+ pid = os.fork()
+ if not pid:
+ # Child process
+ os.close( rFdOut )
+ if rFdOut != rFdErr:
+ os.close( rFdErr )
+ os.dup2( wFdOut, 1 ) # is there some symbolic way to do that ?
+ os.dup2( wFdErr, 2 )
+ os.close( wFdOut )
+ if stdout != stderr:
+ os.close( wFdErr )
+ exitval = 127
+ try:
+ os.execvpe(l[0], l, env)
+ except OSError, e:
+ exitval = exitvalmap.get(e[0], e[0])
+ stderr.write("scons: %s: %s\n" % (l[0], e[1]))
+ os._exit(exitval)
+ else:
+ # Parent process
+ pid, stat = os.waitpid(pid, 0)
+ os.close( wFdOut )
+ if stdout != stderr:
+ os.close( wFdErr )
+ childOut = os.fdopen( rFdOut )
+ if stdout != stderr:
+ childErr = os.fdopen( rFdErr )
+ else:
+ childErr = childOut
+ process_cmd_output(childOut, childErr, stdout, stderr)
+ os.close( rFdOut )
+ if stdout != stderr:
+ os.close( rFdErr )
+ if stat & 0xff:
+ return stat | 0x80
+ return stat >> 8
+
+def piped_env_spawn(sh, escape, cmd, args, env, stdout, stderr):
+ # spawn using Popen3 combined with the env command
+ # the command name and the command's stdout is written to stdout
+ # the command's stderr is written to stderr
+ return exec_popen3([_get_env_command(sh, escape, cmd, args, env)],
+ env, stdout, stderr)
+
+def piped_fork_spawn(sh, escape, cmd, args, env, stdout, stderr):
+ # spawn using fork / exec and providing a pipe for the command's
+ # stdout / stderr stream
+ return exec_piped_fork([sh, '-c', ' '.join(args)],
+ env, stdout, stderr)
+
+
+
+def generate(env):
+ # If os.spawnvpe() exists, we use it to spawn commands. Otherwise
+ # if the env utility exists, we use os.system() to spawn commands,
+ # finally we fall back on os.fork()/os.exec().
+ #
+ # os.spawnvpe() is prefered because it is the most efficient. But
+ # for Python versions without it, os.system() is prefered because it
+ # is claimed that it works better with threads (i.e. -j) and is more
+ # efficient than forking Python.
+ #
+ # NB: Other people on the scons-users mailing list have claimed that
+ # os.fork()/os.exec() works better than os.system(). There may just
+ # not be a default that works best for all users.
+
+ if 'spawnvpe' in os.__dict__:
+ spawn = spawnvpe_spawn
+ elif env.Detect('env'):
+ spawn = env_spawn
+ else:
+ spawn = fork_spawn
+
+ if env.Detect('env'):
+ pspawn = piped_env_spawn
+ else:
+ pspawn = piped_fork_spawn
+
+ if 'ENV' not in env:
+ env['ENV'] = {}
+ env['ENV']['PATH'] = '/usr/local/bin:/opt/bin:/bin:/usr/bin'
+ env['OBJPREFIX'] = ''
+ env['OBJSUFFIX'] = '.o'
+ env['SHOBJPREFIX'] = '$OBJPREFIX'
+ env['SHOBJSUFFIX'] = '$OBJSUFFIX'
+ env['PROGPREFIX'] = ''
+ env['PROGSUFFIX'] = ''
+ env['LIBPREFIX'] = 'lib'
+ env['LIBSUFFIX'] = '.a'
+ env['SHLIBPREFIX'] = '$LIBPREFIX'
+ env['SHLIBSUFFIX'] = '.so'
+ env['LIBPREFIXES'] = [ '$LIBPREFIX' ]
+ env['LIBSUFFIXES'] = [ '$LIBSUFFIX', '$SHLIBSUFFIX' ]
+ env['PSPAWN'] = pspawn
+ env['SPAWN'] = spawn
+ env['SHELL'] = 'sh'
+ env['ESCAPE'] = escape
+ env['TEMPFILE'] = TempFileMunge
+ env['TEMPFILEPREFIX'] = '@'
+ #Based on LINUX: ARG_MAX=ARG_MAX=131072 - 3000 for environment expansion
+ #Note: specific platforms might rise or lower this value
+ env['MAXLINELENGTH'] = 128072
+
+ # This platform supports RPATH specifications.
+ env['__RPATH'] = '$_RPATH'
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4:
projects / zxing.git / blobdiff