Provided by: manpages-dev_4.04-2_all bug


       uselib - load shared library


       #include <unistd.h>

       int uselib(const char *library);


       The  system  call  uselib()  serves  to  load  a  shared library to be used by the calling
       process.  It is given a pathname.  The address where to  load  is  found  in  the  library
       itself.  The library can have any recognized binary format.


       On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.


       In  addition  to all of the error codes returned by open(2) and mmap(2), the following may
       also be returned:

       EACCES The library specified by library does not have read or execute permission,  or  the
              caller  does  not  have  search  permission  for one of the directories in the path
              prefix.  (See also path_resolution(7).)

       ENFILE The system-wide limit on the total number of open files has been reached.

              The file specified by library is not an executable of a known type; for example, it
              does not have the correct magic numbers.


       uselib() is Linux-specific, and should not be used in programs intended to be portable.


       uselib() was used by early libc startup code to load the shared libraries with names found
       in an array of names in the binary.

       Since libc 4.3.2, startup code tries to prefix these names with "/usr/lib", "/lib" and  ""
       before  giving  up.  In libc 4.3.4 and later these names are looked for in the directories
       found in LD_LIBRARY_PATH, and if not found there, prefixes "/usr/lib", "/lib" and "/"  are

       From  libc  4.4.4 on only the library "/lib/" is loaded, so that this dynamic library
       can load the remaining libraries needed (again using this call).  This is also  the  state
       of affairs in libc5.

       glibc2 does not use this call.


       ar(1), gcc(1), ld(1), ldd(1), mmap(2), open(2), dlopen(3), capabilities(7),


       This  page  is  part of release 4.04 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at