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    The following form allows you to view linux man pages.

    Command:

    query_module

    
    
    

    SYNOPSIS

           #include <linux/module.h>
    
           int query_module(const char *name, int which, void *buf,
                            size_t bufsize, size_t *ret);
    
           Note: There is no glibc wrapper for this system call; see NOTES.
    
    
    

    DESCRIPTION

           Note: This system call is present only in kernels before Linux 2.6.
    
           query_module() requests information from the kernel about loadable mod-
           ules.  The returned information is placed in the buffer pointed  to  by
           buf.   The caller must specify the size of buf in bufsize.  The precise
           nature and format of the returned information depend on  the  operation
           specified  by  which.   Some operations require name to identify a cur-
           rently loaded module, some allow name to be NULL, indicating the kernel
           proper.
    
           The following values can be specified for which:
    
           0      Returns success, if the kernel supports query_module().  Used to
                  probe for availability of the system call.
    
           QM_MODULES
                  Returns the names of all loaded modules.   The  returned  buffer
                  consists of a sequence of null-terminated strings; ret is set to
                  the number of modules.
    
           QM_DEPS
                  Returns the names of all modules used by the  indicated  module.
                  The  returned  buffer  consists of a sequence of null-terminated
                  strings; ret is set to the number of modules.
    
           QM_REFS
                  Returns the names of all modules  using  the  indicated  module.
                  This is the inverse of QM_DEPS.  The returned buffer consists of
                  a sequence of null-terminated strings; ret is set to the  number
                  of modules.
    
           QM_SYMBOLS
                  Returns  the  symbols  and  values exported by the kernel or the
                  indicated module.  The returned buffer is an array of structures
                  of the following form
    
                      struct module_symbol {
                          unsigned long value;
                          unsigned long name;
                      };
    
                  followed  by  null-terminated strings.  The value of name is the
                  character offset of the string relative to the start of buf; ret
                  MOD_RUNNING, MOD_AUTOCLEAN, and so on, that indicates  the  cur-
                  rent  status  of  the  module  (see the Linux kernel source file
                  include/linux/module.h).  ret is set to the  size  of  the  mod-
                  ule_info structure.
    
    
    

    RETURN VALUE

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

    ERRORS

           EFAULT At least one of name, buf, or  ret  was  outside  the  program's
                  accessible address space.
    
           EINVAL Invalid  which;  or  name is NULL (indicating "the kernel"), but
                  this is not permitted with the specified value of which.
    
           ENOENT No module by that name exists.
    
           ENOSPC The buffer size provided was too small.  ret is set to the mini-
                  mum size needed.
    
           ENOSYS query_module()  is  not  supported in this version of the kernel
                  (e.g., the kernel is version 2.6 or later).
    
    
    

    VERSIONS

           This system call is present on Linux only up until kernel 2.4;  it  was
           removed in Linux 2.6.
    
    
    

    CONFORMING TO

           query_module() is Linux-specific.
    
    
    

    NOTES

           Some  of the information that was formerly available via query_module()
           can be obtained from /proc/modules, /proc/kallsyms, and the files under
           the directory /sys/module.
    
           Glibc  does not provide a wrapper for this system call; in the unlikely
           event that you need to use it on an old kernel, use syscall(2).
    
    
    

    SEE ALSO

           create_module(2), delete_module(2), get_kernel_syms(2), init_module(2),
           lsmod(8), modinfo(8)
    
    
    

    Linux 2013-01-27 QUERY_MODULE(2)

    
    
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