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Add 'udevcookies' command for dmsetup.

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This commit is contained in:
Peter Rajnoha 2009-08-06 15:05:10 +00:00
parent f9ff23dffe
commit e637f732ed
1 changed files with 41 additions and 0 deletions
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41
tools/dmsetup.c
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@ -36,6 +36,7 @@
#include <sys/param.h>
#include <locale.h>
#include <langinfo.h>
#include <time.h>
#include <fcntl.h>
#include <sys/stat.h>
@ -853,6 +854,45 @@ static int _udevcomplete_all(int argc __attribute((unused)), char **argv __attri
}
#endif
static int _udevcookies(int argc __attribute((unused)), char **argv __attribute((unused)), void *data __attribute((unused)))
{
int max_id, id, sid;
struct seminfo sinfo;
struct semid_ds sdata;
int val;
char *time_str;
if ((max_id = semctl(0, 0, SEM_INFO, &sinfo)) < 0) {
log_sys_error("sem_ctl", "SEM_INFO");
return 0;
}
printf("cookie semid value last_semop_time\n");
for (id = 0; id <= max_id; id++) {
if ((sid = semctl(id, 0, SEM_STAT, &sdata)) < 0)
continue;
if (sdata.sem_perm.__key >> 16 == DM_COOKIE_MAGIC) {
if ((val = semctl(sid, 0, GETVAL)) < 0) {
log_error("semid %d: sem_ctl failed for "
"cookie 0x%" PRIx32 ": %s",
sid, sdata.sem_perm.__key,
strerror(errno));
continue;
}
time_str = ctime((const time_t *) &sdata.sem_otime);
printf("0x%-10x %-10d %-10d %s", sdata.sem_perm.__key,
sid, val, time_str ? time_str : "unknown");
}
}
return 1;
}
static int _version(int argc __attribute((unused)), char **argv __attribute((unused)), void *data __attribute((unused)))
{
char version[80];
@ -2385,6 +2425,7 @@ static struct command _commands[] = {
{"mknodes", "[<device>]", 0, 1, _mknodes},
{"udevcomplete", "<cookie>", 1, 1, _udevcomplete},
{"udevcomplete_all", "", 0, 0, _udevcomplete_all},
{"udevcookies", "", 0, 0, _udevcookies},
{"targets", "", 0, 0, _targets},
{"version", "", 0, 0, _version},
{"setgeometry", "<device> <cyl> <head> <sect> <start>", 5, 5, _setgeometry},