NAME

       uselib - load shared library

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
       recognized 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_resolution(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 known type, e.g., 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), capabilities(7), ld.so(8)

COLOPHON

       This  page  is  part  of  release 3.54 of the Linux man-pages project.  A description of the project, and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.