proc_dostring (9) - Linux Man Pages

proc_dostring: read a string sysctl

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.

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