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| 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¶
struct ctl_table * table
the sysctl table
int write
TRUE if this is a write to the sysctl file
void __user * buffer
the user buffer
size_t * lenp
the size of the user buffer
loff_t * 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¶
| June 2017 | Kernel Hackers Manual 4.11 |