Difference between revisions of "Ldd"
From Linuxintro
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In this case, libkutils is loaded from /usr/local/lib64/libkutils.so.4 to memory address 0x00007feed334b000. | 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 = | = Usage = |
Revision as of 09:43, 24 May 2009
ldd 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.*//"