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    Command:

    uselib

    
    
    

    SYNOPSIS

           #include <unistd.h>
    
           int uselib(const char *library);
    
    
    

    DESCRIPTION

           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 recog-
           nized binary format.
    
    
    

    RETURN VALUE

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

    ERRORS

           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_reso-
                  lution(7).)
    
           ENFILE The  system  limit  on  the  total number of open files has been
                  reached.
    
           ENOEXEC
                  The file specified by library is not an executable  of  a  known
                  type; for example, it does not have the correct magic numbers.
    
    
    

    CONFORMING TO

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

    NOTES

           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  tried.
    
           From  libc  4.4.4  on  only the library "/lib/ld.so" 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.
    
    
    

    SEE ALSO

           ar(1),  gcc(1),  ld(1),  ldd(1), mmap(2), open(2), dlopen(3), capabili-
    
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