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$FreeBSD: head/share/man/man5/libmap.conf.5 130582 2004-06-16 08:33:57Z ru $
.Dd January 31, 2004 .Dt LIBMAP.CONF 5 .Os .Sh NAME .Nm libmap.conf .Nd "configuration file for dynamic object dependency mapping" .Sh DESCRIPTION The .Nm libmap functionality of .Xr ld-elf.so.1 1 allows dynamic object dependencies to be mapped to arbitrary names.
p The configuration file consists of two whitespace separated columns; the left hand side containing the mapping candidate and the right hand side containing the mapping. Dependencies are matched against candidates and replaced with the mappings.
p Constrained mappings may be specified by enclosing the name of the executable or library in brackets. All mappings following a constraint will only be evaluated for that constraint. Constraints can be one of three types: l -tag -width indent t Exact The constraint is matched literally so that only an executable with an identical fully qualified pathname will match the constraint. This means that the executable
a /usr/bin/foo will not match a constraint for
a /usr/bin/./foo and vice-versa. This is the default constraint type. t Basename A constraint with no path is matched against the basename of the executable.
a foo will match
a /usr/local/sbin/foo , or any other executable named
a foo , no matter what its path is. t Directory A constraint with a trailing slash is prefix-matched against the full pathname of the executable.
a /usr/bin/ will match any executable with a path starting with /usr/bin. .El
p Note that the executable path matched against is the .Fa path parameter in an .Fn exec* function call. The Directory or Exact constraints can only match when the executable is called with a full pathname. Most programs executed from a shell are run without a full path, via .Fn exec*p , so the Basename constraint type is the most useful.
p WARNING! Constrained mappings must never appear first in the configuration file. While there is a way to specify the .Dq default constraint, its use is not recommended.
p The most common use at the date of writing is for allowing multiple .Tn POSIX threading libraries to be used on a system without relinking or changing symlinks. .Sh EXAMPLES d -literal # /etc/libmap.conf # # candidate mapping # libpthread.so.1 libpthread.so.1 # Everything uses 'libpthread' libpthread.so libpthread.so libc_r.so.5 libpthread.so.1 # Everything that uses 'libc_r' libc_r.so libpthread.so # now uses 'libpthread' [/tmp/mplayer] # Test version of mplayer uses libc_r libpthread.so.1 libc_r.so.5 libpthread.so libc_r.so [mplayer] # All other mplayers use libpthread libpthread.so.1 libpthread.so.1 libpthread.so libpthread.so [/usr/local/jdk1.4.1/] # All Java 1.4.1 programs use libthr # This works because "javavms" executes # programs with the full pathname libpthread.so.1 libthr.so.1 libpthread.so libthr.so .Ed .Sh FILES l -tag -width ".Pa /etc/libmap.conf" -compact t Pa /etc/libmap.conf The libmap configuration file. .El .Sh SEE ALSO .Xr ldd 1 , .Xr rtld 1 .Sh HISTORY The .Nm manual page and .Nm libmap functionality first appeared in .Fx 5.1 . .Sh AUTHORS This manual page was written by .An Matthew N. Dodd Aq winter@jurai.net .