Difference between revisions of "Ldd"
From Linuxintro
imported>ThorstenStaerk |
imported>ThorstenStaerk |
||
| Line 1: | Line 1: | ||
| − | [[ldd]] shows which libraries are used by an executable file. | + | [[ldd]] is a [[command]] that shows which libraries are used by an executable file. |
;Example | ;Example | ||
Revision as of 09:55, 24 May 2009
ldd is a command that shows which libraries are used by an executable file.
- Example
itchy:~ # ldd /usr/local/bin/ktimetracker
linux-vdso.so.1 => (0x00007fffdb7ff000)
libkutils.so.4 => /usr/local/lib64/libkutils.so.4 (0x00007feed334b000)
libkparts.so.4 => /usr/local/lib64/libkparts.so.4 (0x00007feed30fa000)
libkcal.so.4 => /usr/local/lib64/libkcal.so.4 (0x00007feed2dd7000)
[...]
In this case, libkutils is loaded from /usr/local/lib64/libkutils.so.4 to memory address 0x00007feed334b000.
ldd uses the LD_LIBRARY_PATH variable to find out where to search for libraries:
tweedleburg:~/jail # ldd ktimetracker
linux-vdso.so.1 => (0x00007fffa7dff000)
libkutils.so.4 => /usr/lib64/libkutils.so.4 (0x00007fa69f8e1000)
libkparts.so.4 => /usr/lib64/libkparts.so.4 (0x00007fa69f69f000)
tweedleburg:~/jail # export LD_LIBRARY_PATH=.
tweedleburg:~/jail # ldd ktimetracker
linux-vdso.so.1 => (0x00007fff65fff000)
libkutils.so.4 => ./libkutils.so.4 (0x00007f595da82000)
libkparts.so.4 => ./libkparts.so.4 (0x00007f595d831000)
Usage
To find out all files that an executable file depends on:
ldd /usr/local/bin/ktimetracker | sed "s/^.* => //" | sed "s/ (0x.*//"
