grep: defined-S_ISSOCK.diff

[Dimitar Zhekov]

 Testing for DJGPP is not enough to determine if S_ISSOCK is
 supported - no MSDOS or WIN32 is guaranteed to support it. For
 example, MINGW doesn't support it by default, but may do so if
 using a msys posix emulation library. So, perhaps the most fair
 test is if the target system has S_ISSOCK defined: according to
 posix it's a macro, and I don't know of any system where it's
 a function. Maybe a STAT_MACROS_BROKEN / defined S_IFSOCK test
 such as in isdir.c should also be done, don't know about that.

--- grep-2.5.orig/src/grep.c    2002-03-13 14:49:52.000000000 +0000
+++ grep-2.5/src/grep.c 2003-04-08 10:29:42.000000000 +0000
@@ -262,7 +262,7 @@
     }
   if (directories == SKIP_DIRECTORIES && S_ISDIR (stats->stat.st_mode))
     return 0;
-#ifndef DJGPP
+#ifdef S_ISSOCK
   if (devices == SKIP_DEVICES && (S_ISCHR(stats->stat.st_mode) || 
S_ISBLK(stats->stat.st_mode) || S_ISSOCK(stats->stat.st_mode)))
 #else
   if (devices == SKIP_DEVICES && (S_ISCHR(stats->stat.st_mode) || 
S_ISBLK(stats->stat.st_mode)))