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/* loglevel.c - routines to modify kernel console loglevel
*
* Released under GPL v2.
* (c) 2007 Tim Dijkstra
*/
#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mount.h>
static FILE *printk_file;
static int proc_mounted = 0;
inline void open_printk(void)
{
struct stat stat_buf;
char *procname = "/proc/sys/kernel/printk";
if (stat(procname, &stat_buf) && errno == ENOENT) {
if (mount("none", "/proc", "proc", 0, NULL)) {
fprintf(stderr, "resume: Could not mount proc\n");
return;
} else
proc_mounted = 1;
}
printk_file = fopen(procname, "r+");
}
inline int get_kernel_console_loglevel(void)
{
int level = -1;
if (printk_file) {
rewind(printk_file);
fscanf(printk_file, "%d", &level);
}
return level;
}
inline void set_kernel_console_loglevel(int level)
{
if (printk_file) {
rewind(printk_file);
fprintf(printk_file, "%d\n", level);
fflush(printk_file);
}
}
inline void close_printk(void)
{
if (printk_file)
fclose(printk_file);
if (proc_mounted)
umount("/proc");
}
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