NAME

       uselib - load shared library

SYNOPSIS

       #include <unistd.h>

       [[deprecated]] 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 to indicate the error.

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-wide 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.

STANDARDS

       Linux.

HISTORY

       This  obsolete  system call is not supported by glibc.  No declaration is provided in glibc headers, but,
       through a quirk of history, glibc before glibc 2.23 did export an ABI for this system  call.   Therefore,
       in  order  to  employ this system call, it was sufficient to manually declare the interface in your code;
       alternatively, you could invoke the system call using syscall(2).

       In ancient libc versions (before glibc 2.0), uselib() was used to load the shared  libraries  with  names
       found in an array of names in the binary.

       Since Linux 3.15, this system call is available only when the kernel is configured with the CONFIG_USELIB
       option.

SEE ALSO

       ar(1), gcc(1), ld(1), ldd(1), mmap(2), open(2), dlopen(3), capabilities(7), ld.so(8)