dyld-851.27.tar.gz

[apple/dyld.git] / doc / man / man3 / dlopen.3

diff --git a/doc/man/man3/dlopen.3 b/doc/man/man3/dlopen.3
index 8f88c472915e29ad569e7d0de00cb721ebde7651..1da4927ae0baabb16c212d8d2cc45f7113ad747e 100644 (file)
--- a/doc/man/man3/dlopen.3
+++ b/doc/man/man3/dlopen.3
@@ -1,4 +1,4 @@
-.Dd Nov 6, 2006
+.Dd Aug 7, 2012
 .Os
 .Dt DLOPEN 3
 .Sh NAME
@@ -121,36 +121,54 @@ returned will only search the main executable.
 .Fn dlopen
 searches for a compatible Mach-O file in the directories specified by a set of environment variables and 
 the process's current working directory.
-When set, the environment variables must contain a colon-separated list of directory paths, 
-which can be absolute or relative to the current working directory. The environment variables 
-are LD_LIBRARY_PATH, DYLD_LIBRARY_PATH, and DYLD_FALLBACK_LIBRARY_PATH. 
-The first two variables have no default value. The default value of DYLD_FALLBACK_LIBRARY_PATH
-is $HOME/lib;/usr/local/lib;/usr/lib. 
-.Fn dlopen 
-searches the directories specified in the environment variables in the order they are listed. 
+When set, the environment variables contain a colon-separated list of directory paths, 
+which can be absolute or relative to the current working directory. 
 .Pp
 When 
 .Fa path
-doesn't contain a slash character (i.e. it is just a leaf name), 
+does not contain a slash character (i.e. it is just a leaf name), 
 .Fn dlopen
-searches the following the following until it finds a compatible Mach-O file: $LD_LIBRARY_PATH, 
+searches the following until it finds a compatible Mach-O file: $LD_LIBRARY_PATH, 
 $DYLD_LIBRARY_PATH, current working directory, $DYLD_FALLBACK_LIBRARY_PATH.
 .Pp
 When 
 .Fa path 
-contains a slash (i.e. a full path or a partial path)
+looks like a framework path (e.g. /stuff/foo.framework/foo), 
 .Fn dlopen
-searches the following the following until it finds a compatible Mach-O file: 
-$DYLD_LIBRARY_PATH (with leaf name from 
+searches the following until it finds a compatible Mach-O file: 
+$DYLD_FRAMEWORK_PATH (with framework partial path from 
 .Fa path
-), current working directory (for partial paths), $DYLD_FALLBACK_LIBRARY_PATH
-(with leaf name from 
+), then the supplied 
+.Fa path 
+(using current working directory for relative paths), then 
+$DYLD_FALLBACK_FRAMEWORK_PATH (with framework partial path from 
 .Fa path
 ).
 .Pp
+When 
+.Fa path 
+contains a slash but is not a framework path (i.e. a full path or a partial path to a dylib), 
+.Fn dlopen
+searches the following until it finds a compatible Mach-O file: 
+$DYLD_LIBRARY_PATH (with leaf name from 
+.Fa path 
+), then the supplied 
+.Fa path 
+(using current working directory for relative paths), then 
+$DYLD_FALLBACK_LIBRARY_PATH (with leaf name from  
+.Fa path 
+).
+.Pp
+Note: If DYLD_FALLBACK_LIBRARY_PATH is not set, dlopen operates as if 
+DYLD_FALLBACK_LIBRARY_PATH was set to $HOME/lib:/usr/local/lib:/usr/lib.
+.Pp
+Note: If DYLD_FALLBACK_FRAMEWORK_PATH is not set, dlopen operates as if 
+DYLD_FALLBACK_FRAMEWORK_PATH was set to $HOME/Library/Frameworks:/Library/Frameworks:/Network/Library/Frameworks:/System/Library/Frameworks. 
+.Pp
 Note: There are no configuration files to control dlopen searching.  
 .Pp
-Note: If the main executable is a set[ug]id binary, then all environment variables are ignored, and only a full path can be used. 
+Note: If the main executable is a set[ug]id binary or codesigned with entitlements, 
+then all environment variables are ignored, and only a full path can be used. 
 .Pp
 Note: Mac OS X uses "universal" files to combine 32-bit and 64-bit libraries.  This means there are no separate 32-bit and 64-bit search paths.
 .Pp
@@ -159,16 +177,11 @@ If
 .Fn dlopen
 fails, it returns a null pointer, and sets an error condition which may be interrogated with 
 .Fn dlerror .
-.Sh AUTHORS
-Mac OS X 10.3 incorporated the dlcompat package written by Jorge Acereda <jacereda@users.sourceforge.net>
-and Peter O'Gorman <ogorman@users.sourceforge.net>.
-.Pp
-In Mac OS X 10.4, dlopen was rewritten to be a native part of dyld.
 .Pp
 .Sh SEE ALSO
 .Xr dlopen_preflight 3
 .Xr dlclose 3
 .Xr dlsym 3
 .Xr dlerror 3
-.Xr dyld 3
+.Xr dyld 1
 .Xr ld 1