PROC_DOSTRING(9)                       The proc filesystem                       PROC_DOSTRING(9)



NAME
       proc_dostring - read a string sysctl

SYNOPSIS
       int proc_dostring(struct ctl_table * table, int write, void __user * buffer,
                         size_t * lenp, loff_t * ppos);

ARGUMENTS
       table
           the sysctl table

       write
           TRUE if this is a write to the sysctl file

       buffer
           the user buffer

       lenp
           the size of the user buffer

       ppos
           file position

DESCRIPTION
       Reads/writes a string from/to the user buffer. If the kernel buffer provided is not large
       enough to hold the string, the string is truncated. The copied string is NULL-terminated.
       If the string is being read by the user process, it is copied and a newline '\n' is added.
       It is truncated if the buffer is not large enough.

       Returns 0 on success.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                          PROC_DOSTRING(9)