Name

proc_dostring — read a string sysctl

Synopsis

int proc_dostring (struct ctl_table *  table,
 int  write,
 struct file *  filp,
 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

filp

the file structure

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.