diff options
Diffstat (limited to '')
| -rw-r--r-- | setup.py | 95 |
1 files changed, 94 insertions, 1 deletions
@@ -16,13 +16,106 @@ from distutils.core import setup, Extension from portato.constants import FRONTENDS, VERSION, DATA_DIR, ICON_DIR, PLUGIN_DIR, TEMPLATE_DIR ### copied from shm's setup.py ### + +import popen2 +import tempfile + +# shm makes use of the ipc_perm structure defined in include/sys/ipc.h (or include/bits/ipc.h +# on some systems). That structure includes an element called key, _key or __key depending +# on the OS. Here's the variations I've been able to find with OS version numbers where +# possible. +# key: FreeBSD 6, AIX, Solaris, OS X 10.3, OS X 10.4 (conditionally) +# _key: NetBSD, OS X 10.4 (conditionally) +# __key: Debian 4 (Etch), Ubuntu 7, RH 3.3 & 3.4 + +# OS X side note: OS X 10.4's ipc.h (see /Developer/SDKs/MacOSX10.4u.sdk/usr/include/sys/ipc.h) +# defines structs called __ipc_perm_old (which uses key) and __ipc_perm_new (which uses _key). +# Use of __ipc_perm_new is inside this: +# #if defined(__POSIX_C_SOURCE) || defined(kernel) || defined(__LP64__) +# Obviously __ipc_perm_new is the preferred version. This code doesn't use that yet but +# will probably do so in some future version when compiled on OS X >= 10.4. + +# Trying to enumerate all of the variations is a fool's errand so instead I figure it out +# on the fly using the function CountKeyUnderscores() below. + +# Lots of systems use the unadorned "key" so that's the default when I'm forced to guess. +COUNT_KEY_UNDERSCORES_DEFAULT = 0 + +def CountKeyUnderscores(): + """ Uses trial-and-error with the system's C compiler to figure out the number of + underscores preceding key in the ipc_perm structure. Returns 0, 1 or 2. In case of + error, it makes a guess and hopes for the best. + """ + UnderscoresCount = COUNT_KEY_UNDERSCORES_DEFAULT + + underscores = { } + + # mktemp isn't secure, but I don't care since I use it only for compiling this dummy code. + # Using mktemp() allows me to keep this code compatible with Python < 2.3. + path = tempfile.mktemp(dir='.') + os.mkdir(path) + if path[-1] != "/": path += '/' + + # Here I compile three mini-programs with key, _key and __key. Theoretically, + # two should fail and one should succeed, and that will tell me how this platform names + # ipc_perm.key. If the number of successes != 1, something's gone wrong. + # I use popen2.Popen4() in order to trap (and discard) stderr so that the user doesn't + # see the compiler errors I'm deliberately generating here. + src = """ +#include <sys/ipc.h> +int main(void) { struct ipc_perm foo; foo.%skey = 42; } + +""" + for i in range(0, 3): + # I'd prefer to feed the C source to the compiler via stdin so as to entirely avoid + # using files and directories, but I had trouble on Ubuntu getting echo to cooperate. + filename = "%d.c" % i + file(path + filename, "w").write(src % ('_' * i)) + + cmd = ["cc", "-c", "-o", "/dev/null", "%s" % path + filename] + + po = popen2.Popen4(cmd) + if not po.wait(): underscores[i] = True + + # Clean up + os.remove(path + filename) + + os.rmdir(path) + + KeyCount = len(underscores.keys()) + + if KeyCount == 1: + UnderscoresCount = underscores.keys()[0] + else: + print """ +********************************************************************* +* I was unable to detect the structure of ipc_perm on your system. * +* I'll make my best guess, but compiling might fail anyway. Please * +* email this message, the error code of %d, and the name of your OS * +* to the contact at http://NikitaTheSpider.com/python/shm/. * +********************************************************************* +""" % KeyCount + + return UnderscoresCount + + MacrosAndDefines = [ ] # HAVE_UNION_SEMUN needs to be #defined on FreeBSD and OS X and must *not* be #defined # on Linux. On other systems, I'm not sure. Please let me know if you find that you # need to make changes for your platform. -if ("bsd" in sys.platform) or ("darwin" in sys.platform): +if (sys.platform.find("bsd") != -1) or (sys.platform.find("darwin") != -1): MacrosAndDefines.append( ('HAVE_UNION_SEMUN', None) ) + +KeyUnderscores = CountKeyUnderscores() + +if KeyUnderscores == 2: + MacrosAndDefines.append( ('TWO_UNDERSCORE_KEY', None) ) +elif KeyUnderscores == 1: + MacrosAndDefines.append( ('ONE_UNDERSCORE_KEY', None) ) +else: + MacrosAndDefines.append( ('ZERO_UNDERSCORE_KEY', None) ) + ### end copy ### def plugin_list (*args): |